| Class / Patent application number | Description | Number of patent applications / Date published |
|---|
| 126099000 | HOT-AIR FURNACES | 68 |
| 20080314378 | HEAT EXCHANGER - A furnace or other heat exchanger application for heating, ventilation, air conditioning and refrigeration systems having condensate control. Specifically, the disclosure includes condensate control for secondary heat exchangers for use with high efficiency furnaces, particularly for small tonnage systems, such as residential or unitary systems. The application provides condensate management to permit a plurality of furnace orientations while providing resistance to corrosion due to liquid condensate, while providing a furnace system that utilizes less expensive materials and is easily fabricated. | 12-25-2008 |
| 20080257336 | Furnace with Integrated Blower Housing and Heat Exchanger - A combustion furnace includes a blower housing with a centrifugal blower impeller disposed therein and plural heat exchanger tubes disposed substantially around a major portion of the periphery of the impeller. The heat exchanger tubes receive combustion gasses from plural burner nozzles and discharge combustion gasses to a plenum in communication with a motor driven inducer gas pump. The integrated blower housing and heat exchanger may be disposed in a cabinet including support structure for a fuel delivery manifold, associated burner nozzles and forming air inlet and outlet openings for air being circulated by the blower. | 10-23-2008 |
| 20090293867 | COMBUSTION BLOWER CONTROL FOR MODULATING FURNACE - A furnace includes a combustion blower and one or more pressure switches. In some cases, the one or more pressure switches may be used to calculate one or more operating points for the combustion blower. Additional operating points may be calculated by interpolation and/or extrapolation, as appropriate. The furnace may temporarily alter these operating points as necessary to keep the furnace safely operating in response to minor and/or transient changes in the operating conditions of the furnace. | 12-03-2009 |
| 20120055465 | CONDENSATE PAN WITH CONDENSATE TRAP - A condensate pan for a condensing furnace includes a main chamber to receive exhaust gases, a condensate trap separate from the main chamber and internal the condensate pan and a main drain. | 03-08-2012 |
| 20090056705 | COMBUSTION SYSTEM - A combustion system includes: a furnace housing defining a combustion chamber therein and having a gas outlet in fluid communication with the combustion chamber; a plenum housing surrounding and cooperating with the furnace housing to define a plenum chamber therebetween, and having an air inlet and an air outlet which are in fluid communication with the plenum chamber; and a heat exchanger housing disposed outwardly of the plenum housing and having an air inlet in fluid communication with the air outlet of the plenum housing, an air outlet, a gas inlet in fluid communication with the gas outlet of the furnace housing, and a gas outlet. | 03-05-2009 |
| 20080283047 | Radiant heater assembly - A radiant tube heater assembly includes a housing containing a blower and a burner, which is aligned with an opening in the housing through which a flame and products of combustion flow into a U-shaped burner tube. The closed downstream end of the burner tube is in close proximity to the housing. In order to prevent or reduce the likelihood of the products of combustion entering the blower, an exhaust tube is mounted in a downstream leg of the burner tube and extends outwardly through the U-shaped outer end of the tube remote from the housing. | 11-20-2008 |
| 126110000 | Compressed air | 11 |
| 20120090590 | INDUCER FAN ASSEMBLY FOR A GAS FURNACE SYSTEM - An inducer fan assembly including an inducer fan housing having a flue vent connection member configured and disposed to be connected to an exhaust gas flue vent. The flue vent connection member includes a flue gas outlet and a flue vent condensate inlet. | 04-19-2012 |
| 20110174289 | CONDENSATE TRAP FOR HEATING-COOLING SYSTEMS - A condensation trap comprising an inlet chamber, a vent chamber and an outlet chamber. The inlet chamber is configured to receive condensate fluid through an external opening therein. The vent chamber is in fluid communication with the inlet chamber via a first passageway that includes an internal opening of the inlet chamber. The internal opening is located substantially at an opposite end of the vent chamber as the external opening. The outlet chamber is in fluid communication with the vent chamber via a second passageway that includes an internal opening in a sidewall of the vent chamber and an interior opening in an end of the outlet chamber. The outlet chamber is configured to transmit the condensate fluid through an exterior opening located at an opposite end of the outlet chamber. A vent volume portion is greater than a total volume of an internal space of the inlet chamber. | 07-21-2011 |
| 20090114205 | High Efficiency Furnace Having a Blower Housing with an Enlarged Air Outlet Opening - An air distribution blower housing for a furnace is designed with an enlarged air outlet opening that slows down and spreads out the air flow from the blower housing over a greater area of the furnace heat exchanger. The blower housing thereby enables less air pressure drop through the heat exchanger, which increases the efficiency of the blower motor operation. The design of the blower housing also efficiently turns the velocity head of the air flow through the housing to usable static air pressure at the housing air outlet. The enlarged air outlet opening of the blower housing is achieved without increasing the exterior diameter dimensions of the blower housing by utilizing a volute outer wall of the blower housing that has an exponentially increasing expansion angle in the direction of air flow through the blower housing. | 05-07-2009 |
| 20090114206 | Furnace Air Handler Blower Housing with an Enlarged Air Outlet Opening - An air distribution blower housing for an air handler such as a residential furnace is designed with an enlarged air outlet opening that slows down and spreads out the air flow from the blower housing over a greater area of the furnace heat exchanger. The blower housing thereby enables less air pressure drop through the heat exchanger, which increases the efficiency of the blower motor operation. The design of the blower housing also efficiently turns the velocity head of the air flow through the housing to usable static air pressure at the housing air outlet. The enlarged air outlet opening of the blower housing is achieved without increasing the exterior diameter dimensions of the blower housing whereby the blower housing is used in a compact enclosure for residential use. This is accomplished by utilizing a volute outer wall of the blower housing that has an exponentially increasing expansion angle in the direction of air flow through the blower housing. | 05-07-2009 |
| 20110174290 | HEAT EXCHANGER WITH FASTENER - A clamshell heat exchanger includes a first clamshell half and a second clamshell half. The first and second clamshell halves each include a through-hole therein. The first and second clamshell halves form a passageway, with a seal region located between portions of the passageway. A fastener is located within the first and second through-holes within the seal region. The fastener is configured to rigidly join the first clamshell half to the second clamshell half while allowing relative lateral motion between said first and said second clamshell halves. | 07-21-2011 |
| 20120279484 | Fuel Oil Supply System from a Remote Source Including Recirculated Heating of Fuel Oil and Supplemented Supply Pressure - A fuel oil supply system for a portable fuel oil consuming device, representatively a portable oil fired construction heater includes supply and return fuel lines in communication with a remote fuel container in an anti-siphon configuration. One or more electrical heaters heat the fuel lines adjacent an integral pump of the consuming device. The fuel lines communicate with a partitioned volume of fuel within the container which is heated relative to a remaining volume as the fuel circulates. The pump and a combustion air blower of the device are located together with the heaters within an enclosure on the device such that air is drawn into the enclosure over the heaters and heat conducting surfaces of the pump by the blower for directing heated air through a combustion air duct of the blower which surrounds the burner and a main fuel line from the pump to the burner. | 11-08-2012 |
| 20130014740 | HEAT EXCHANGER FOR A HIGH EFFICIENCY HOT AIR HEATING APPLIANCE AND HEATING APPLIANCE EQUIPPED THEREWITH - Heat exchanger for a high efficiency hot air heating appliance ( | 01-17-2013 |
| 20080283033 | FORCED AIR FURNACE - A forced air furnace comprises an enclosure, an adjusting mechanism, an interface, an electric heating element and a fan. The enclosure has an air inlet and an air outlet. The adjusting mechanism is operative to adjust the air outlet between an open position and a partially closed position. The interface is located proximate to the air outlet and is used to connect the air outlet to a duct. The fan is powered by an electric motor. Both the fan and the electric heating element are located inside the enclosure. There is also described a method of installing a forced air furnace. The method comprises the step of adjusting a size of an exhaust area of an air outlet of the forced air furnace in order to produce a desired exhaust airflow through the exhaust area when the forced air furnace is connected to a ductwork. | 11-20-2008 |
| 20130092144 | GAS-FIRED HEATER WITH CARBON DIOXIDE DETECTOR - A portable gas-fired heater comprising a housing, a burner assembly, and a carbon dioxide detector system. The housing is adapted to at least partially enclose a fuel source. The burner assembly is enclosed by the housing. | 04-18-2013 |
| 20100024794 | Direct-fired ductable heater - A direct-fired heater suitable for connection to duct work is disclosed. The heater comprises an outer shell comprising an inlet for allowing inlet of air to be heated and an outlet for exhausting heated air. A fan blade is operatively connected to a fan motor for operating the fan blade. The heater also comprises a combustion chamber defined by a combustion chamber wall, a burner plate at one end proximate the fan blade and an exhaust plate at an opposite end, the burner plate having openings therein for allowing airflow into the combustion chamber and the exhaust plate have an opening therein for allowing exit of heated exhaust from the combustion chamber, the combustion chamber wall extending past the burner plate. A first airflow zone exists between the outer shell and the combustion chamber allowing airflow between the fan blade and the outlet in the outer shell. An injector for injecting gas into the combustion chamber in proximity to the openings in the burner plate is used. The heater also comprises a nose cone between the outlet in the outer shell and the exhaust plate, the nose cone positioned to allow airflow through the exhaust plate and out of the outlet. The burner plate is located in a position proximate the fan blade suitable to cause recirculation of air blown by the fan blade to cool the injector and burner plate during operation of the heater. | 02-04-2010 |
| 20080302351 | Gas-Fired Portable Heater - A portable gas fired heater includes a combustion chamber having an air inlet and an air outlet. A low DC voltage (optionally AC voltage) fan or blower directs air through the combustion chamber so that the air is heated. Preferably, a vortex generator is located between the fan or blower and the combustion chamber such that air entering the combustion chamber swirls. The heater is designed to have a low center of gravity and thus difficult to tip-over. Nevertheless, several safety features are provided including a tip-over switch, thermal coupler, temperature limit switch, and a manual shutoff. | 12-11-2008 |
| 126110000 | Blower and air damper | 1 |
| 20120090590 | INDUCER FAN ASSEMBLY FOR A GAS FURNACE SYSTEM - An inducer fan assembly including an inducer fan housing having a flue vent connection member configured and disposed to be connected to an exhaust gas flue vent. The flue vent connection member includes a flue gas outlet and a flue vent condensate inlet. | 04-19-2012 |
| 20110174289 | CONDENSATE TRAP FOR HEATING-COOLING SYSTEMS - A condensation trap comprising an inlet chamber, a vent chamber and an outlet chamber. The inlet chamber is configured to receive condensate fluid through an external opening therein. The vent chamber is in fluid communication with the inlet chamber via a first passageway that includes an internal opening of the inlet chamber. The internal opening is located substantially at an opposite end of the vent chamber as the external opening. The outlet chamber is in fluid communication with the vent chamber via a second passageway that includes an internal opening in a sidewall of the vent chamber and an interior opening in an end of the outlet chamber. The outlet chamber is configured to transmit the condensate fluid through an exterior opening located at an opposite end of the outlet chamber. A vent volume portion is greater than a total volume of an internal space of the inlet chamber. | 07-21-2011 |
| 20090114205 | High Efficiency Furnace Having a Blower Housing with an Enlarged Air Outlet Opening - An air distribution blower housing for a furnace is designed with an enlarged air outlet opening that slows down and spreads out the air flow from the blower housing over a greater area of the furnace heat exchanger. The blower housing thereby enables less air pressure drop through the heat exchanger, which increases the efficiency of the blower motor operation. The design of the blower housing also efficiently turns the velocity head of the air flow through the housing to usable static air pressure at the housing air outlet. The enlarged air outlet opening of the blower housing is achieved without increasing the exterior diameter dimensions of the blower housing by utilizing a volute outer wall of the blower housing that has an exponentially increasing expansion angle in the direction of air flow through the blower housing. | 05-07-2009 |
| 20090114206 | Furnace Air Handler Blower Housing with an Enlarged Air Outlet Opening - An air distribution blower housing for an air handler such as a residential furnace is designed with an enlarged air outlet opening that slows down and spreads out the air flow from the blower housing over a greater area of the furnace heat exchanger. The blower housing thereby enables less air pressure drop through the heat exchanger, which increases the efficiency of the blower motor operation. The design of the blower housing also efficiently turns the velocity head of the air flow through the housing to usable static air pressure at the housing air outlet. The enlarged air outlet opening of the blower housing is achieved without increasing the exterior diameter dimensions of the blower housing whereby the blower housing is used in a compact enclosure for residential use. This is accomplished by utilizing a volute outer wall of the blower housing that has an exponentially increasing expansion angle in the direction of air flow through the blower housing. | 05-07-2009 |
| 20110174290 | HEAT EXCHANGER WITH FASTENER - A clamshell heat exchanger includes a first clamshell half and a second clamshell half. The first and second clamshell halves each include a through-hole therein. The first and second clamshell halves form a passageway, with a seal region located between portions of the passageway. A fastener is located within the first and second through-holes within the seal region. The fastener is configured to rigidly join the first clamshell half to the second clamshell half while allowing relative lateral motion between said first and said second clamshell halves. | 07-21-2011 |
| 20120279484 | Fuel Oil Supply System from a Remote Source Including Recirculated Heating of Fuel Oil and Supplemented Supply Pressure - A fuel oil supply system for a portable fuel oil consuming device, representatively a portable oil fired construction heater includes supply and return fuel lines in communication with a remote fuel container in an anti-siphon configuration. One or more electrical heaters heat the fuel lines adjacent an integral pump of the consuming device. The fuel lines communicate with a partitioned volume of fuel within the container which is heated relative to a remaining volume as the fuel circulates. The pump and a combustion air blower of the device are located together with the heaters within an enclosure on the device such that air is drawn into the enclosure over the heaters and heat conducting surfaces of the pump by the blower for directing heated air through a combustion air duct of the blower which surrounds the burner and a main fuel line from the pump to the burner. | 11-08-2012 |
| 20130014740 | HEAT EXCHANGER FOR A HIGH EFFICIENCY HOT AIR HEATING APPLIANCE AND HEATING APPLIANCE EQUIPPED THEREWITH - Heat exchanger for a high efficiency hot air heating appliance ( | 01-17-2013 |
| 20080283033 | FORCED AIR FURNACE - A forced air furnace comprises an enclosure, an adjusting mechanism, an interface, an electric heating element and a fan. The enclosure has an air inlet and an air outlet. The adjusting mechanism is operative to adjust the air outlet between an open position and a partially closed position. The interface is located proximate to the air outlet and is used to connect the air outlet to a duct. The fan is powered by an electric motor. Both the fan and the electric heating element are located inside the enclosure. There is also described a method of installing a forced air furnace. The method comprises the step of adjusting a size of an exhaust area of an air outlet of the forced air furnace in order to produce a desired exhaust airflow through the exhaust area when the forced air furnace is connected to a ductwork. | 11-20-2008 |
| 20130092144 | GAS-FIRED HEATER WITH CARBON DIOXIDE DETECTOR - A portable gas-fired heater comprising a housing, a burner assembly, and a carbon dioxide detector system. The housing is adapted to at least partially enclose a fuel source. The burner assembly is enclosed by the housing. | 04-18-2013 |
| 20100024794 | Direct-fired ductable heater - A direct-fired heater suitable for connection to duct work is disclosed. The heater comprises an outer shell comprising an inlet for allowing inlet of air to be heated and an outlet for exhausting heated air. A fan blade is operatively connected to a fan motor for operating the fan blade. The heater also comprises a combustion chamber defined by a combustion chamber wall, a burner plate at one end proximate the fan blade and an exhaust plate at an opposite end, the burner plate having openings therein for allowing airflow into the combustion chamber and the exhaust plate have an opening therein for allowing exit of heated exhaust from the combustion chamber, the combustion chamber wall extending past the burner plate. A first airflow zone exists between the outer shell and the combustion chamber allowing airflow between the fan blade and the outlet in the outer shell. An injector for injecting gas into the combustion chamber in proximity to the openings in the burner plate is used. The heater also comprises a nose cone between the outlet in the outer shell and the exhaust plate, the nose cone positioned to allow airflow through the exhaust plate and out of the outlet. The burner plate is located in a position proximate the fan blade suitable to cause recirculation of air blown by the fan blade to cool the injector and burner plate during operation of the heater. | 02-04-2010 |
| 20080302351 | Gas-Fired Portable Heater - A portable gas fired heater includes a combustion chamber having an air inlet and an air outlet. A low DC voltage (optionally AC voltage) fan or blower directs air through the combustion chamber so that the air is heated. Preferably, a vortex generator is located between the fan or blower and the combustion chamber such that air entering the combustion chamber swirls. The heater is designed to have a low center of gravity and thus difficult to tip-over. Nevertheless, several safety features are provided including a tip-over switch, thermal coupler, temperature limit switch, and a manual shutoff. | 12-11-2008 |
| 126110000 | Unit heaters | 2 |
| 20120090590 | INDUCER FAN ASSEMBLY FOR A GAS FURNACE SYSTEM - An inducer fan assembly including an inducer fan housing having a flue vent connection member configured and disposed to be connected to an exhaust gas flue vent. The flue vent connection member includes a flue gas outlet and a flue vent condensate inlet. | 04-19-2012 |
| 20110174289 | CONDENSATE TRAP FOR HEATING-COOLING SYSTEMS - A condensation trap comprising an inlet chamber, a vent chamber and an outlet chamber. The inlet chamber is configured to receive condensate fluid through an external opening therein. The vent chamber is in fluid communication with the inlet chamber via a first passageway that includes an internal opening of the inlet chamber. The internal opening is located substantially at an opposite end of the vent chamber as the external opening. The outlet chamber is in fluid communication with the vent chamber via a second passageway that includes an internal opening in a sidewall of the vent chamber and an interior opening in an end of the outlet chamber. The outlet chamber is configured to transmit the condensate fluid through an exterior opening located at an opposite end of the outlet chamber. A vent volume portion is greater than a total volume of an internal space of the inlet chamber. | 07-21-2011 |
| 20090114205 | High Efficiency Furnace Having a Blower Housing with an Enlarged Air Outlet Opening - An air distribution blower housing for a furnace is designed with an enlarged air outlet opening that slows down and spreads out the air flow from the blower housing over a greater area of the furnace heat exchanger. The blower housing thereby enables less air pressure drop through the heat exchanger, which increases the efficiency of the blower motor operation. The design of the blower housing also efficiently turns the velocity head of the air flow through the housing to usable static air pressure at the housing air outlet. The enlarged air outlet opening of the blower housing is achieved without increasing the exterior diameter dimensions of the blower housing by utilizing a volute outer wall of the blower housing that has an exponentially increasing expansion angle in the direction of air flow through the blower housing. | 05-07-2009 |
| 20090114206 | Furnace Air Handler Blower Housing with an Enlarged Air Outlet Opening - An air distribution blower housing for an air handler such as a residential furnace is designed with an enlarged air outlet opening that slows down and spreads out the air flow from the blower housing over a greater area of the furnace heat exchanger. The blower housing thereby enables less air pressure drop through the heat exchanger, which increases the efficiency of the blower motor operation. The design of the blower housing also efficiently turns the velocity head of the air flow through the housing to usable static air pressure at the housing air outlet. The enlarged air outlet opening of the blower housing is achieved without increasing the exterior diameter dimensions of the blower housing whereby the blower housing is used in a compact enclosure for residential use. This is accomplished by utilizing a volute outer wall of the blower housing that has an exponentially increasing expansion angle in the direction of air flow through the blower housing. | 05-07-2009 |
| 20110174290 | HEAT EXCHANGER WITH FASTENER - A clamshell heat exchanger includes a first clamshell half and a second clamshell half. The first and second clamshell halves each include a through-hole therein. The first and second clamshell halves form a passageway, with a seal region located between portions of the passageway. A fastener is located within the first and second through-holes within the seal region. The fastener is configured to rigidly join the first clamshell half to the second clamshell half while allowing relative lateral motion between said first and said second clamshell halves. | 07-21-2011 |
| 20120279484 | Fuel Oil Supply System from a Remote Source Including Recirculated Heating of Fuel Oil and Supplemented Supply Pressure - A fuel oil supply system for a portable fuel oil consuming device, representatively a portable oil fired construction heater includes supply and return fuel lines in communication with a remote fuel container in an anti-siphon configuration. One or more electrical heaters heat the fuel lines adjacent an integral pump of the consuming device. The fuel lines communicate with a partitioned volume of fuel within the container which is heated relative to a remaining volume as the fuel circulates. The pump and a combustion air blower of the device are located together with the heaters within an enclosure on the device such that air is drawn into the enclosure over the heaters and heat conducting surfaces of the pump by the blower for directing heated air through a combustion air duct of the blower which surrounds the burner and a main fuel line from the pump to the burner. | 11-08-2012 |
| 20130014740 | HEAT EXCHANGER FOR A HIGH EFFICIENCY HOT AIR HEATING APPLIANCE AND HEATING APPLIANCE EQUIPPED THEREWITH - Heat exchanger for a high efficiency hot air heating appliance ( | 01-17-2013 |
| 20080283033 | FORCED AIR FURNACE - A forced air furnace comprises an enclosure, an adjusting mechanism, an interface, an electric heating element and a fan. The enclosure has an air inlet and an air outlet. The adjusting mechanism is operative to adjust the air outlet between an open position and a partially closed position. The interface is located proximate to the air outlet and is used to connect the air outlet to a duct. The fan is powered by an electric motor. Both the fan and the electric heating element are located inside the enclosure. There is also described a method of installing a forced air furnace. The method comprises the step of adjusting a size of an exhaust area of an air outlet of the forced air furnace in order to produce a desired exhaust airflow through the exhaust area when the forced air furnace is connected to a ductwork. | 11-20-2008 |
| 20130092144 | GAS-FIRED HEATER WITH CARBON DIOXIDE DETECTOR - A portable gas-fired heater comprising a housing, a burner assembly, and a carbon dioxide detector system. The housing is adapted to at least partially enclose a fuel source. The burner assembly is enclosed by the housing. | 04-18-2013 |
| 20100024794 | Direct-fired ductable heater - A direct-fired heater suitable for connection to duct work is disclosed. The heater comprises an outer shell comprising an inlet for allowing inlet of air to be heated and an outlet for exhausting heated air. A fan blade is operatively connected to a fan motor for operating the fan blade. The heater also comprises a combustion chamber defined by a combustion chamber wall, a burner plate at one end proximate the fan blade and an exhaust plate at an opposite end, the burner plate having openings therein for allowing airflow into the combustion chamber and the exhaust plate have an opening therein for allowing exit of heated exhaust from the combustion chamber, the combustion chamber wall extending past the burner plate. A first airflow zone exists between the outer shell and the combustion chamber allowing airflow between the fan blade and the outlet in the outer shell. An injector for injecting gas into the combustion chamber in proximity to the openings in the burner plate is used. The heater also comprises a nose cone between the outlet in the outer shell and the exhaust plate, the nose cone positioned to allow airflow through the exhaust plate and out of the outlet. The burner plate is located in a position proximate the fan blade suitable to cause recirculation of air blown by the fan blade to cool the injector and burner plate during operation of the heater. | 02-04-2010 |
| 20080302351 | Gas-Fired Portable Heater - A portable gas fired heater includes a combustion chamber having an air inlet and an air outlet. A low DC voltage (optionally AC voltage) fan or blower directs air through the combustion chamber so that the air is heated. Preferably, a vortex generator is located between the fan or blower and the combustion chamber such that air entering the combustion chamber swirls. The heater is designed to have a low center of gravity and thus difficult to tip-over. Nevertheless, several safety features are provided including a tip-over switch, thermal coupler, temperature limit switch, and a manual shutoff. | 12-11-2008 |
| 126110000 | Unitary fan and heater | 1 |
| 20120090590 | INDUCER FAN ASSEMBLY FOR A GAS FURNACE SYSTEM - An inducer fan assembly including an inducer fan housing having a flue vent connection member configured and disposed to be connected to an exhaust gas flue vent. The flue vent connection member includes a flue gas outlet and a flue vent condensate inlet. | 04-19-2012 |
| 20110174289 | CONDENSATE TRAP FOR HEATING-COOLING SYSTEMS - A condensation trap comprising an inlet chamber, a vent chamber and an outlet chamber. The inlet chamber is configured to receive condensate fluid through an external opening therein. The vent chamber is in fluid communication with the inlet chamber via a first passageway that includes an internal opening of the inlet chamber. The internal opening is located substantially at an opposite end of the vent chamber as the external opening. The outlet chamber is in fluid communication with the vent chamber via a second passageway that includes an internal opening in a sidewall of the vent chamber and an interior opening in an end of the outlet chamber. The outlet chamber is configured to transmit the condensate fluid through an exterior opening located at an opposite end of the outlet chamber. A vent volume portion is greater than a total volume of an internal space of the inlet chamber. | 07-21-2011 |
| 20090114205 | High Efficiency Furnace Having a Blower Housing with an Enlarged Air Outlet Opening - An air distribution blower housing for a furnace is designed with an enlarged air outlet opening that slows down and spreads out the air flow from the blower housing over a greater area of the furnace heat exchanger. The blower housing thereby enables less air pressure drop through the heat exchanger, which increases the efficiency of the blower motor operation. The design of the blower housing also efficiently turns the velocity head of the air flow through the housing to usable static air pressure at the housing air outlet. The enlarged air outlet opening of the blower housing is achieved without increasing the exterior diameter dimensions of the blower housing by utilizing a volute outer wall of the blower housing that has an exponentially increasing expansion angle in the direction of air flow through the blower housing. | 05-07-2009 |
| 20090114206 | Furnace Air Handler Blower Housing with an Enlarged Air Outlet Opening - An air distribution blower housing for an air handler such as a residential furnace is designed with an enlarged air outlet opening that slows down and spreads out the air flow from the blower housing over a greater area of the furnace heat exchanger. The blower housing thereby enables less air pressure drop through the heat exchanger, which increases the efficiency of the blower motor operation. The design of the blower housing also efficiently turns the velocity head of the air flow through the housing to usable static air pressure at the housing air outlet. The enlarged air outlet opening of the blower housing is achieved without increasing the exterior diameter dimensions of the blower housing whereby the blower housing is used in a compact enclosure for residential use. This is accomplished by utilizing a volute outer wall of the blower housing that has an exponentially increasing expansion angle in the direction of air flow through the blower housing. | 05-07-2009 |
| 20110174290 | HEAT EXCHANGER WITH FASTENER - A clamshell heat exchanger includes a first clamshell half and a second clamshell half. The first and second clamshell halves each include a through-hole therein. The first and second clamshell halves form a passageway, with a seal region located between portions of the passageway. A fastener is located within the first and second through-holes within the seal region. The fastener is configured to rigidly join the first clamshell half to the second clamshell half while allowing relative lateral motion between said first and said second clamshell halves. | 07-21-2011 |
| 20120279484 | Fuel Oil Supply System from a Remote Source Including Recirculated Heating of Fuel Oil and Supplemented Supply Pressure - A fuel oil supply system for a portable fuel oil consuming device, representatively a portable oil fired construction heater includes supply and return fuel lines in communication with a remote fuel container in an anti-siphon configuration. One or more electrical heaters heat the fuel lines adjacent an integral pump of the consuming device. The fuel lines communicate with a partitioned volume of fuel within the container which is heated relative to a remaining volume as the fuel circulates. The pump and a combustion air blower of the device are located together with the heaters within an enclosure on the device such that air is drawn into the enclosure over the heaters and heat conducting surfaces of the pump by the blower for directing heated air through a combustion air duct of the blower which surrounds the burner and a main fuel line from the pump to the burner. | 11-08-2012 |
| 20130014740 | HEAT EXCHANGER FOR A HIGH EFFICIENCY HOT AIR HEATING APPLIANCE AND HEATING APPLIANCE EQUIPPED THEREWITH - Heat exchanger for a high efficiency hot air heating appliance ( | 01-17-2013 |
| 20080283033 | FORCED AIR FURNACE - A forced air furnace comprises an enclosure, an adjusting mechanism, an interface, an electric heating element and a fan. The enclosure has an air inlet and an air outlet. The adjusting mechanism is operative to adjust the air outlet between an open position and a partially closed position. The interface is located proximate to the air outlet and is used to connect the air outlet to a duct. The fan is powered by an electric motor. Both the fan and the electric heating element are located inside the enclosure. There is also described a method of installing a forced air furnace. The method comprises the step of adjusting a size of an exhaust area of an air outlet of the forced air furnace in order to produce a desired exhaust airflow through the exhaust area when the forced air furnace is connected to a ductwork. | 11-20-2008 |
| 20130092144 | GAS-FIRED HEATER WITH CARBON DIOXIDE DETECTOR - A portable gas-fired heater comprising a housing, a burner assembly, and a carbon dioxide detector system. The housing is adapted to at least partially enclose a fuel source. The burner assembly is enclosed by the housing. | 04-18-2013 |
| 20100024794 | Direct-fired ductable heater - A direct-fired heater suitable for connection to duct work is disclosed. The heater comprises an outer shell comprising an inlet for allowing inlet of air to be heated and an outlet for exhausting heated air. A fan blade is operatively connected to a fan motor for operating the fan blade. The heater also comprises a combustion chamber defined by a combustion chamber wall, a burner plate at one end proximate the fan blade and an exhaust plate at an opposite end, the burner plate having openings therein for allowing airflow into the combustion chamber and the exhaust plate have an opening therein for allowing exit of heated exhaust from the combustion chamber, the combustion chamber wall extending past the burner plate. A first airflow zone exists between the outer shell and the combustion chamber allowing airflow between the fan blade and the outlet in the outer shell. An injector for injecting gas into the combustion chamber in proximity to the openings in the burner plate is used. The heater also comprises a nose cone between the outlet in the outer shell and the exhaust plate, the nose cone positioned to allow airflow through the exhaust plate and out of the outlet. The burner plate is located in a position proximate the fan blade suitable to cause recirculation of air blown by the fan blade to cool the injector and burner plate during operation of the heater. | 02-04-2010 |
| 20080302351 | Gas-Fired Portable Heater - A portable gas fired heater includes a combustion chamber having an air inlet and an air outlet. A low DC voltage (optionally AC voltage) fan or blower directs air through the combustion chamber so that the air is heated. Preferably, a vortex generator is located between the fan or blower and the combustion chamber such that air entering the combustion chamber swirls. The heater is designed to have a low center of gravity and thus difficult to tip-over. Nevertheless, several safety features are provided including a tip-over switch, thermal coupler, temperature limit switch, and a manual shutoff. | 12-11-2008 |
| 126116000 | Liquid or gaseous fuel | 32 |
| 20080314375 | CONDENSATE PAN WITH CONDENSATE TRAP - A condensate pan for a condensing furnace includes a main chamber to receive exhaust gases, a condensate trap separate from the main chamber and internal the condensate pan and a main drain. | 12-25-2008 |
| 20130037013 | BURNER FOR HEATING SYSTEM - A burner for a furnace includes an inner wall defining a central burner chamber. The inner wall includes a plurality of inner wall openings to admit a fuel flow into the central burner chamber. The burner further includes an outer wall which, defines an annulus for the fuel flow to the plurality of inner wall openings. An igniter is located in the central chamber. A furnace includes a heat exchanger and one or more burners disposed at and aligned with one or more burner openings of the heat exchanger. The one or more burners include an inner wall defining a central burner chamber. The inner wall includes a plurality of inner wall openings to admit a fuel flow into the central burner chamber. The one or more burners further include an outer wall defining an annulus for the fuel flow to the plurality of inner wall openings. | 02-14-2013 |
| 20100095945 | DUAL FUEL VENT FREE GAS HEATER - A dual fuel vent free gas heater having at least one gas burner with a plurality of gas outlet ports in an upper surface thereof. The gas outlet ports are in flow communication with at least one pilot flame burner. An adjustable fuel injector or at least two fuel injectors feed fuel to the burner providing for introduction of more than one fuel to the burner. Optionally, an oxygen detection system, manual fuel selection control valve, and/or temperature shut off control system may be incorporated into the dual fuel vent free heater. | 04-22-2010 |
| 20130037014 | HEATER CONFIGURED TO OPERATE WITH A FIRST OR SECOND FUEL - A heater can be configured to operate with either a first fuel at a first pressure or a second fuel at a second pressure. In some embodiments, a pressure regulator unit is configured to regulate the pressure of either the first fuel or the second fuel and to direct either the first fuel or the second fuel towards a combustion chamber. A nozzle assembly can be configured to inject the fuel into the combustion chamber. | 02-14-2013 |
| 20120180774 | MIXING DEVICE FOR MIXING FUEL AND AIR AND FURNACE WITH A MIXING DEVICE - Mixing devices for mixing fuel and air for a premix burner or furnace and furnaces (e.g., premix) with mixing devices. Furnaces may be for heating an occupied space, and may produce lower NOx emissions. A mixing device may be located within an inlet tube, may have a surface that is perpendicular to the direction of fuel flow or that forms a circle, or may have two surfaces held at substantially opposite angles to induce swirl. A portion of the mixing device may extend over an orifice of the fuel injector. A mixing device may be attached to the fuel injector, may be made from a piece of sheet metal, and may have a hole for attachment to the fuel injector. Mixing devices may have a center, two arms, and two ends, which may be separated by bends. A burner plate may be sandwiched between surfaces to allow for expansion. | 07-19-2012 |
| 20130098350 | LOW EMISSIONS DIRECT FIRED AIR HEATER - Method of combusting hydrocarbon fuel to form combustion products low in nitrogen dioxide (NO2) and carbon monoxide (CO) and mixing the combustion products with additional air to provide a heated air stream suitable for heating enclosed spaces includes the following steps: (a) delivering a fuel stream to a burner assembly; (b) delivering a combustion air stream to the burner assembly; (c) combining the fuel and air streams within a combustion chamber and heat exchanger wherein the mixture is ignited, completely combusted, and the temperature of the products of combustion are reduced; (d) providing tempering air to the external side of the combustion chamber and heat exchanger to transfer heat away from the combustion gases to tempering air; (e) combining the partially heated tempering air and cooled combustion products low in NO2 and CO; and (f) discharging the mixture into a space to be heated. | 04-25-2013 |
| 20110283987 | OUTDOOR GAS HEATER - An outdoor gas heater used in the field is provided. The outdoor gas heater includes a primary combustion net having a dual net structure. A wind-proof cover is provided to protect a thermocouple. Fuel gas is concentrated into a fuel gas discharge hole formed in the wind-proof cover so that an initial ignition performance is improved. A support is provided to support the outdoor gas heater from the top surface of a gas container. A fuel gas inlet tube is vertically installed between a head unit and a safety valve while being spaced apart from an adjustment handle, and a fire extinguishing safety device is provided behind the fuel gas inlet tube, so that the fire extinguishing safety device is hidden by the fuel gas inlet tube, thereby minimizing a volume of the gas heater without degrading aesthetic appearance of the gas heater. | 11-24-2011 |
| 20080245354 | Furnace with integrated blower housing and heat exchanger - A combustion furnace includes a blower housing with a centrifugal blower impeller disposed therein and plural heat exchanger tubes disposed substantially around a major portion of the periphery of the impeller. The heat exchanger tubes receive combustion gasses from plural burner nozzles and discharge combustion gasses to a plenum in communication with a motor driven inducer gas pump. The integrated blower housing and heat exchanger may be disposed in a cabinet including support structure for a fuel delivery manifold, associated burner nozzles and forming air inlet and outlet openings for air being circulated by the blower. | 10-09-2008 |
| 20110056476 | BURNING SYSTEM - The present invention refers to an improved burning system for industrial furnace burners (16), more specifically for tunnel type furnaces for firing ceramic materials, to improve the thermal efficiency and reduce the consumption by these furnaces in the process of firing load (10) such as floor tiles, tiles, sanitary material, refractories, porcelain, insulators, grindstone, tableware ceramic, red ceramic and ceramic in general, by a using flame rotation system, providing a radiant flame surface by dividing the flame into smaller intermittent flames. | 03-10-2011 |
| 20120240917 | HEATING APPLIANCE FOR AIR HEATING - A heating appliance including a burner and a heat exchanger including a bundle of heat conducting elements that form the primary channels through which the hot flue gases from the burner are guided via inputs that are opposite the burner, and which are connected together to close off the secondary channels that are formed between the aforementioned elements and through which the air to be heated can be guided. The burner is a premix burner that is positioned opposite the inputs of the primary channels, whereby the burner has a supply for a mixture of fuel and a sufficient quantity of air for the essentially complete combustion of the fuel, and whereby between the burner and the inputs of the primary channels there is a heat shield of a heat-resistant material with a passage opposite each of the aforementioned inputs. | 09-27-2012 |
| 20110247603 | Furnace Vent with Water-Permeable Inner Pipe - A vent system for improving the efficiency and/or reducing emissions of a combustion device is disclosed. The vent system may include an outer pipe and an inner pipe having a longitudinal section that is permeable to water or water vapor and is longitudinally disposed within the outer pipe. The inner pipe defines a first passageway and the outer and inner pipes define a second passageway therebetween. As the moisture and/or heat are transferred from the flue gas to the intake air through the longitudinal section of the inner pipe, the efficiency of the furnace may be improved and the NOx emission of the furnace may be reduced. | 10-13-2011 |
| 20100294257 | Direct-fired heating system - A direct gas-fired heating unit is provided which uses an axial-bladed fan for generating a main air flow through a burner unit. The burner unit has a dedicated combustion air blower supplying combustion air to the burner separate from a main air flow generated by the main fan. The burner unit includes a dedicated blower which draws a small volume of outside air as combustion air. Further, the burner unit may include bypass ports which allows for discharge of bypass air from the burner unit. | 11-25-2010 |
| 20100000508 | OIL-FIRED FRAC WATER HEATER - The present invention overcomes many of the disadvantages of prior art mobile oil field heat exchange systems by providing an oil-fired heat exchange system. The present invention is a self-contained unit which is easily transported to remote locations. The present invention includes a single-pass tubular coil heat exchanger contained within a closed-bottom firebox having a forced-air combustion and cooling system. The rig also includes integral fuel tanks, hydraulic and pneumatic systems for operating the rig at remote operations in ail weather environments. In a preferred embodiment, the oil-fired heat exchanger system is used to heat water on-the-fly (i.e., directly from the supply source to the well head) to complete hydraulic fracturing operations. The present invention also includes systems for regulating and adjusting the fuel/air mixture within the firebox to maximize the combustion efficiency. The system includes a novel hood opening mechanism attached to the exhaust stack of the firebox. | 01-07-2010 |
| 20090145419 | FURNACE HEAT EXCHANGER - The present invention provides an alternative single burner heat exchanger combination for a gas-fired furnace for hot air generation to be used to heat spaces in residential and commercial settings. The fuel fired furnace is compiled of the known set-up of a plurality of spaced heat exchangers wherein each heat exchanger has an inlet port for receipt therein of combustion gases. The single burner is a premix burner providing an excellent combustion of the gas-air mixture. The burner is in fluid communication with each port of each heat exchanger through a dilution zone and a distributor. Preferably, these are all airtight connected to each other as can be seen in FIG. | 06-11-2009 |
| 20120125311 | PREMIX AIR HEATER - A gas-fired heater includes a gas supply line, an air supply line, a valve coupled to the gas supply line and a controller coupled to the valve. The controller is configured to control the valve to control a gas-air mixture. The gas-fired heater also includes a burner configured to receive the gas-air mixture and burn the gas-air mixture, and a heat exchanger coupled to the burner. The heat exchanger is configured to perform a heat exchange process and output heated air. The gas-fired heater further includes a combustion fan located downstream of the heat exchanger, the combustion fan being configured to pull or draw flue gases through the heat exchanger. | 05-24-2012 |
| 20120247444 | Gas-Fired Furnace and Intake Manifold for Low NOx Applications - A gas-fired air conditioning furnace comprises a monolithic intake manifold including an inlet at a first end and a plurality of outlets at a second end opposite the first end. In addition, the furnace comprises a burner assembly including a plurality of burners, each burner is configured to combust an air-fuel mixture at least partially within an interior space of the burner. Further, each burner extends into one of the outlets of the intake manifold. | 10-04-2012 |
| 20120227727 | Hot air heater and blower assembly - A gas-fired heater assembly for use in conjunction with a shrink wrap chamber or tunnel, including a gas-fired heater assembly, said gas-fired heater assembly incorporating an air intake, and having a gas port for injection of combustive gas into the heat chamber for combustion, the heated air combustion directed into the length of an associated heat box, said heat box having a designed opening for uniform dissemination of heated air into a hot air envelop, said hot air envelop being operatively associated with an air circulating blower, said air circulating blower directing air through the regions of the heat box for mixing of the circulating air with the heated air, and directing said mixture of heated air out of the hot air envelop and into the shrink wrap chamber or tunnel for shrinking polymer film about packaged goods for shipment and/or storage. | 09-13-2012 |
| 20120272945 | Auxiliary Heating Duct for an Indirect Fired Heater - An auxiliary duct is supported on the housing of an indirect fired heater of the type having separate heated air and combustion air passages. The auxiliary duct extends between an inlet end at the heated air discharge to an outlet end adjacent a burner assembly at the combustion air inlet so as to be arranged to direct a portion of the flow of air heated by the heater towards components of the burner assembly including fuel lines, a fuel pump, a fuel filter and a combustion air intake blower for heating the burner assembly and associated components to improve the operation thereof in colder climates. | 11-01-2012 |
| 20120080024 | HEATER CONFIGURED TO OPERATE WITH A FIRST OR SECOND FUEL - A heater can be configured to operate with either a first fuel at a first pressure or a second fuel at a second pressure and can include a fluid flow controller. In some embodiments, the fluid flow controller is configured to permit flow of fuel to a first passageway and to direct a first fuel to a first oxygen depletion sensor line when the controller is in a first position and permit the flow of fuel to a second passageway and to direct a second fuel to a second oxygen depletion sensor line when the controller is in a second position. | 04-05-2012 |
| 20120090591 | GAS FURNACE CONDENSATE COLLECTOR BOX - A condensate collector box includes a furnace mounting plate having a first edge portion, a second edge portion that extends from the first edge portion, at least one vent drain channel that extends along one of the first and second edge portions, and a heat exchanger condensate collection area. The condensate collector box also includes an inducer fan mounting member having a first surface and opposing second surface arranged upon the furnace mounting plate to form a condensate collection zone. The inducer fan mounting member includes at least one inducer fan drain passage that is fluidly connected to the at least one vent drain channel | 04-19-2012 |
| 20110146652 | DIRECT FIRED HEATERS WITH IN-SHOT BURNERS, TUBULAR COMBUSTION CHAMBERS, AND/OR VARIABLE VENTURI - Exemplary embodiments of the present disclosure include direct fired heaters and methods relating to the operation of direct fired heaters. An exemplary embodiment of a direct fired heater generally includes one or more in-shot burners and one or more combustion tubes configured to receive combustion air emanating from the one or more in-shot burners. The direct fired heater includes a passageway having an inlet configured to receive or intake a circulating air flow. The passageway may include a venturi portion downstream of the inlet in fluid communication with the exit ends of the combustion tubes. The flow of circulating air through the venturi portion may induce flow of combustion air through the one or more combustion tubes. | 06-23-2011 |
| 20090044794 | Inducer speed control method for combustion furnace - In a multistage combustion furnace having a motor driven inducer blower and a pressure sensing device or set of switches for sensing pressure in the combustion gas flowpath through the furnace, a high firing rate blower speed and low firing rate blower speed are set based on the blower speed setting required for a medium firing rate. Each particular furnace, having its own pressures and combustion gas resistance to flow characteristics, may be provided with a database of inducer blower motor speeds required to achieve predetermined pressures in the combustion gas flowpath for a variety of combustion gas venting systems generating such resistance. | 02-19-2009 |
| 20090308372 | SELECTABLE EFFICIENCY VERSUS COMFORT FOR MODULATING FURNACE - A furnace controller for a modulating furnace that helps provide a balance between energy efficiency and occupant comfort across various burner firing rates and/or across various circulating blower speeds. In some cases, the furnace controller can be configured to permit a user to customize operation of the furnace in accordance with their particular needs and/or desires with respect to efficiency and comfort. A selection may be made between an energy efficiency setting and a user comfort setting. Then, a plenum parameter such as a discharge air temperature (DAT) or discharge air flow (DAF) may be regulated in accordance with the selected setting. | 12-17-2009 |
| 20110290229 | Dual Fuel Vent Free Gas Heater - A dual fuel vent free gas heater having at least one gas burner with a plurality of gas outlet ports in an upper surface thereof. The gas outlet ports are in flow communication with at least one pilot flame burner. An adjustable fuel injector or at least two fuel injectors feed fuel to the burner providing for introduction of more than one fuel to the burner. Optionally, an oxygen detection system, manual fuel selection control valve, and/or temperature shut off control system may be incorporated into the dual fuel vent free heater. | 12-01-2011 |
| 20110290228 | WARM AIR FURNACE - A warm air furnace prevents household articles from freezing in the case where combustion is discontinued due to lack of gas during combustion operation when a house is emptied. The warm air furnace is equipped with a retry operation controller | 12-01-2011 |
| 20110100349 | Modulating Gas Furnace - A method controls a modulating gas furnace by monitoring a differential pressure associated with the modulating gas furnace, learning an intermediate value associated with an intermediate capacity between a minimum output capacity of the gas furnace and a maximum output capacity of the gas furnace, learning one of a high value associated with the maximum output capacity and a low value associated with a minimum output capacity, establishing an estimated operating curve using either the intermediate value and the low value or using the intermediate value and the high value, and operating the gas furnace in accordance with the estimated operating curve. | 05-05-2011 |
| 20090314275 | WARM AIR FURNACE - A warm air furnace capable of reliably carry out the fuel consumption conserving operation notwithstanding the condition such as the heating load is provided. The warm air furnace is equipped with an ecology operation setting unit | 12-24-2009 |
| 20110108015 | Gas-Fired Heater with Carbon Dioxide Detector - A portable gas-fired heater comprising a housing, a burner assembly, and a carbon dioxide detector system. The housing is adapted to at least partially enclose a fuel source. The burner assembly is enclosed by the housing. | 05-12-2011 |
| 20100037884 | DUAL FUEL HEATER - A dual fuel heater can couple with one of two fuel sources operating at different pressures. The dual fuel heater can have a first fuel line, a second fuel line, a fluid flow controller, and a combustion chamber. The fluid flow controller can selectively permit flow of a first fuel to either the first fuel line or flow of a second fuel to the second fuel line. The first fuel line can be in communication with a first oxygen depletion sensor orifice and the second fuel line can be in communication with a second oxygen depletion sensor orifice. | 02-18-2010 |
| 20110146651 | Altitude Adjustment for Heating, Ventilating and Air Conditioning Systems - HVAC systems and methods are shown which use volumetric air flow and static pressure calculations that correct for different air densities encountered at different altitudes. With respect to the volumetric airflow rate, the systems and methods disclosed herein adjust the calculation of airflow rate to better match the BTU content of de-rated natural gas used at higher elevations, and therefore they are usable in HVAC systems that combust natural gas. The adjusted static pressure calculations may be used in any type of HVAC system. | 06-23-2011 |
| 20080236561 | Combination gas-fired furnace and gas-powered electrical generator - A combination gas-fired furnace and gas-powered electrical generator. The combination includes a furnace and an electrical generator. The furnace is gas-fired and has electrical components necessary to operate the furnace. The electrical generator is gas-powered, is electrically connected to the furnace, and activates automatically when normal electrical power to the furnace is interrupted so as to allow the electrical components of the furnace to operate when the normal electrical power to the furnace is interrupted thereby allowing the furnace to operate when the normal electrical power to the furnace is interrupted. | 10-02-2008 |
| 20130008423 | FORCED AIR HEATER INCLUDING ON-BOARD SOURCE OF ELECTRIC ENERGY - A forced-air heater having a self-contained on-board electric-power supply, a fuel tank, a support, a housing, a combustion chamber, and a motorized fan. The self-contained on-board electric-power supply may have a generator, a photovoltaic component, or some combination thereof. The fuel tank may be adapted to store a first fuel. The combustion chamber may be adapted to generate heat by combusting the first fuel with air. The motorized fan may be adapted to draw in ambient air through an air intake and force the air into the combustion chamber. | 01-10-2013 |
| 126116000 | Automatic control | 9 |
| 20080314375 | CONDENSATE PAN WITH CONDENSATE TRAP - A condensate pan for a condensing furnace includes a main chamber to receive exhaust gases, a condensate trap separate from the main chamber and internal the condensate pan and a main drain. | 12-25-2008 |
| 20130037013 | BURNER FOR HEATING SYSTEM - A burner for a furnace includes an inner wall defining a central burner chamber. The inner wall includes a plurality of inner wall openings to admit a fuel flow into the central burner chamber. The burner further includes an outer wall which, defines an annulus for the fuel flow to the plurality of inner wall openings. An igniter is located in the central chamber. A furnace includes a heat exchanger and one or more burners disposed at and aligned with one or more burner openings of the heat exchanger. The one or more burners include an inner wall defining a central burner chamber. The inner wall includes a plurality of inner wall openings to admit a fuel flow into the central burner chamber. The one or more burners further include an outer wall defining an annulus for the fuel flow to the plurality of inner wall openings. | 02-14-2013 |
| 20100095945 | DUAL FUEL VENT FREE GAS HEATER - A dual fuel vent free gas heater having at least one gas burner with a plurality of gas outlet ports in an upper surface thereof. The gas outlet ports are in flow communication with at least one pilot flame burner. An adjustable fuel injector or at least two fuel injectors feed fuel to the burner providing for introduction of more than one fuel to the burner. Optionally, an oxygen detection system, manual fuel selection control valve, and/or temperature shut off control system may be incorporated into the dual fuel vent free heater. | 04-22-2010 |
| 20130037014 | HEATER CONFIGURED TO OPERATE WITH A FIRST OR SECOND FUEL - A heater can be configured to operate with either a first fuel at a first pressure or a second fuel at a second pressure. In some embodiments, a pressure regulator unit is configured to regulate the pressure of either the first fuel or the second fuel and to direct either the first fuel or the second fuel towards a combustion chamber. A nozzle assembly can be configured to inject the fuel into the combustion chamber. | 02-14-2013 |
| 20120180774 | MIXING DEVICE FOR MIXING FUEL AND AIR AND FURNACE WITH A MIXING DEVICE - Mixing devices for mixing fuel and air for a premix burner or furnace and furnaces (e.g., premix) with mixing devices. Furnaces may be for heating an occupied space, and may produce lower NOx emissions. A mixing device may be located within an inlet tube, may have a surface that is perpendicular to the direction of fuel flow or that forms a circle, or may have two surfaces held at substantially opposite angles to induce swirl. A portion of the mixing device may extend over an orifice of the fuel injector. A mixing device may be attached to the fuel injector, may be made from a piece of sheet metal, and may have a hole for attachment to the fuel injector. Mixing devices may have a center, two arms, and two ends, which may be separated by bends. A burner plate may be sandwiched between surfaces to allow for expansion. | 07-19-2012 |
| 20130098350 | LOW EMISSIONS DIRECT FIRED AIR HEATER - Method of combusting hydrocarbon fuel to form combustion products low in nitrogen dioxide (NO2) and carbon monoxide (CO) and mixing the combustion products with additional air to provide a heated air stream suitable for heating enclosed spaces includes the following steps: (a) delivering a fuel stream to a burner assembly; (b) delivering a combustion air stream to the burner assembly; (c) combining the fuel and air streams within a combustion chamber and heat exchanger wherein the mixture is ignited, completely combusted, and the temperature of the products of combustion are reduced; (d) providing tempering air to the external side of the combustion chamber and heat exchanger to transfer heat away from the combustion gases to tempering air; (e) combining the partially heated tempering air and cooled combustion products low in NO2 and CO; and (f) discharging the mixture into a space to be heated. | 04-25-2013 |
| 20110283987 | OUTDOOR GAS HEATER - An outdoor gas heater used in the field is provided. The outdoor gas heater includes a primary combustion net having a dual net structure. A wind-proof cover is provided to protect a thermocouple. Fuel gas is concentrated into a fuel gas discharge hole formed in the wind-proof cover so that an initial ignition performance is improved. A support is provided to support the outdoor gas heater from the top surface of a gas container. A fuel gas inlet tube is vertically installed between a head unit and a safety valve while being spaced apart from an adjustment handle, and a fire extinguishing safety device is provided behind the fuel gas inlet tube, so that the fire extinguishing safety device is hidden by the fuel gas inlet tube, thereby minimizing a volume of the gas heater without degrading aesthetic appearance of the gas heater. | 11-24-2011 |
| 20080245354 | Furnace with integrated blower housing and heat exchanger - A combustion furnace includes a blower housing with a centrifugal blower impeller disposed therein and plural heat exchanger tubes disposed substantially around a major portion of the periphery of the impeller. The heat exchanger tubes receive combustion gasses from plural burner nozzles and discharge combustion gasses to a plenum in communication with a motor driven inducer gas pump. The integrated blower housing and heat exchanger may be disposed in a cabinet including support structure for a fuel delivery manifold, associated burner nozzles and forming air inlet and outlet openings for air being circulated by the blower. | 10-09-2008 |
| 20110056476 | BURNING SYSTEM - The present invention refers to an improved burning system for industrial furnace burners (16), more specifically for tunnel type furnaces for firing ceramic materials, to improve the thermal efficiency and reduce the consumption by these furnaces in the process of firing load (10) such as floor tiles, tiles, sanitary material, refractories, porcelain, insulators, grindstone, tableware ceramic, red ceramic and ceramic in general, by a using flame rotation system, providing a radiant flame surface by dividing the flame into smaller intermittent flames. | 03-10-2011 |
| 20120240917 | HEATING APPLIANCE FOR AIR HEATING - A heating appliance including a burner and a heat exchanger including a bundle of heat conducting elements that form the primary channels through which the hot flue gases from the burner are guided via inputs that are opposite the burner, and which are connected together to close off the secondary channels that are formed between the aforementioned elements and through which the air to be heated can be guided. The burner is a premix burner that is positioned opposite the inputs of the primary channels, whereby the burner has a supply for a mixture of fuel and a sufficient quantity of air for the essentially complete combustion of the fuel, and whereby between the burner and the inputs of the primary channels there is a heat shield of a heat-resistant material with a passage opposite each of the aforementioned inputs. | 09-27-2012 |
| 20110247603 | Furnace Vent with Water-Permeable Inner Pipe - A vent system for improving the efficiency and/or reducing emissions of a combustion device is disclosed. The vent system may include an outer pipe and an inner pipe having a longitudinal section that is permeable to water or water vapor and is longitudinally disposed within the outer pipe. The inner pipe defines a first passageway and the outer and inner pipes define a second passageway therebetween. As the moisture and/or heat are transferred from the flue gas to the intake air through the longitudinal section of the inner pipe, the efficiency of the furnace may be improved and the NOx emission of the furnace may be reduced. | 10-13-2011 |
| 20100294257 | Direct-fired heating system - A direct gas-fired heating unit is provided which uses an axial-bladed fan for generating a main air flow through a burner unit. The burner unit has a dedicated combustion air blower supplying combustion air to the burner separate from a main air flow generated by the main fan. The burner unit includes a dedicated blower which draws a small volume of outside air as combustion air. Further, the burner unit may include bypass ports which allows for discharge of bypass air from the burner unit. | 11-25-2010 |
| 20100000508 | OIL-FIRED FRAC WATER HEATER - The present invention overcomes many of the disadvantages of prior art mobile oil field heat exchange systems by providing an oil-fired heat exchange system. The present invention is a self-contained unit which is easily transported to remote locations. The present invention includes a single-pass tubular coil heat exchanger contained within a closed-bottom firebox having a forced-air combustion and cooling system. The rig also includes integral fuel tanks, hydraulic and pneumatic systems for operating the rig at remote operations in ail weather environments. In a preferred embodiment, the oil-fired heat exchanger system is used to heat water on-the-fly (i.e., directly from the supply source to the well head) to complete hydraulic fracturing operations. The present invention also includes systems for regulating and adjusting the fuel/air mixture within the firebox to maximize the combustion efficiency. The system includes a novel hood opening mechanism attached to the exhaust stack of the firebox. | 01-07-2010 |
| 20090145419 | FURNACE HEAT EXCHANGER - The present invention provides an alternative single burner heat exchanger combination for a gas-fired furnace for hot air generation to be used to heat spaces in residential and commercial settings. The fuel fired furnace is compiled of the known set-up of a plurality of spaced heat exchangers wherein each heat exchanger has an inlet port for receipt therein of combustion gases. The single burner is a premix burner providing an excellent combustion of the gas-air mixture. The burner is in fluid communication with each port of each heat exchanger through a dilution zone and a distributor. Preferably, these are all airtight connected to each other as can be seen in FIG. | 06-11-2009 |
| 20120125311 | PREMIX AIR HEATER - A gas-fired heater includes a gas supply line, an air supply line, a valve coupled to the gas supply line and a controller coupled to the valve. The controller is configured to control the valve to control a gas-air mixture. The gas-fired heater also includes a burner configured to receive the gas-air mixture and burn the gas-air mixture, and a heat exchanger coupled to the burner. The heat exchanger is configured to perform a heat exchange process and output heated air. The gas-fired heater further includes a combustion fan located downstream of the heat exchanger, the combustion fan being configured to pull or draw flue gases through the heat exchanger. | 05-24-2012 |
| 20120247444 | Gas-Fired Furnace and Intake Manifold for Low NOx Applications - A gas-fired air conditioning furnace comprises a monolithic intake manifold including an inlet at a first end and a plurality of outlets at a second end opposite the first end. In addition, the furnace comprises a burner assembly including a plurality of burners, each burner is configured to combust an air-fuel mixture at least partially within an interior space of the burner. Further, each burner extends into one of the outlets of the intake manifold. | 10-04-2012 |
| 20120227727 | Hot air heater and blower assembly - A gas-fired heater assembly for use in conjunction with a shrink wrap chamber or tunnel, including a gas-fired heater assembly, said gas-fired heater assembly incorporating an air intake, and having a gas port for injection of combustive gas into the heat chamber for combustion, the heated air combustion directed into the length of an associated heat box, said heat box having a designed opening for uniform dissemination of heated air into a hot air envelop, said hot air envelop being operatively associated with an air circulating blower, said air circulating blower directing air through the regions of the heat box for mixing of the circulating air with the heated air, and directing said mixture of heated air out of the hot air envelop and into the shrink wrap chamber or tunnel for shrinking polymer film about packaged goods for shipment and/or storage. | 09-13-2012 |
| 20120272945 | Auxiliary Heating Duct for an Indirect Fired Heater - An auxiliary duct is supported on the housing of an indirect fired heater of the type having separate heated air and combustion air passages. The auxiliary duct extends between an inlet end at the heated air discharge to an outlet end adjacent a burner assembly at the combustion air inlet so as to be arranged to direct a portion of the flow of air heated by the heater towards components of the burner assembly including fuel lines, a fuel pump, a fuel filter and a combustion air intake blower for heating the burner assembly and associated components to improve the operation thereof in colder climates. | 11-01-2012 |
| 20120080024 | HEATER CONFIGURED TO OPERATE WITH A FIRST OR SECOND FUEL - A heater can be configured to operate with either a first fuel at a first pressure or a second fuel at a second pressure and can include a fluid flow controller. In some embodiments, the fluid flow controller is configured to permit flow of fuel to a first passageway and to direct a first fuel to a first oxygen depletion sensor line when the controller is in a first position and permit the flow of fuel to a second passageway and to direct a second fuel to a second oxygen depletion sensor line when the controller is in a second position. | 04-05-2012 |
| 20120090591 | GAS FURNACE CONDENSATE COLLECTOR BOX - A condensate collector box includes a furnace mounting plate having a first edge portion, a second edge portion that extends from the first edge portion, at least one vent drain channel that extends along one of the first and second edge portions, and a heat exchanger condensate collection area. The condensate collector box also includes an inducer fan mounting member having a first surface and opposing second surface arranged upon the furnace mounting plate to form a condensate collection zone. The inducer fan mounting member includes at least one inducer fan drain passage that is fluidly connected to the at least one vent drain channel | 04-19-2012 |
| 20110146652 | DIRECT FIRED HEATERS WITH IN-SHOT BURNERS, TUBULAR COMBUSTION CHAMBERS, AND/OR VARIABLE VENTURI - Exemplary embodiments of the present disclosure include direct fired heaters and methods relating to the operation of direct fired heaters. An exemplary embodiment of a direct fired heater generally includes one or more in-shot burners and one or more combustion tubes configured to receive combustion air emanating from the one or more in-shot burners. The direct fired heater includes a passageway having an inlet configured to receive or intake a circulating air flow. The passageway may include a venturi portion downstream of the inlet in fluid communication with the exit ends of the combustion tubes. The flow of circulating air through the venturi portion may induce flow of combustion air through the one or more combustion tubes. | 06-23-2011 |
| 20090044794 | Inducer speed control method for combustion furnace - In a multistage combustion furnace having a motor driven inducer blower and a pressure sensing device or set of switches for sensing pressure in the combustion gas flowpath through the furnace, a high firing rate blower speed and low firing rate blower speed are set based on the blower speed setting required for a medium firing rate. Each particular furnace, having its own pressures and combustion gas resistance to flow characteristics, may be provided with a database of inducer blower motor speeds required to achieve predetermined pressures in the combustion gas flowpath for a variety of combustion gas venting systems generating such resistance. | 02-19-2009 |
| 20090308372 | SELECTABLE EFFICIENCY VERSUS COMFORT FOR MODULATING FURNACE - A furnace controller for a modulating furnace that helps provide a balance between energy efficiency and occupant comfort across various burner firing rates and/or across various circulating blower speeds. In some cases, the furnace controller can be configured to permit a user to customize operation of the furnace in accordance with their particular needs and/or desires with respect to efficiency and comfort. A selection may be made between an energy efficiency setting and a user comfort setting. Then, a plenum parameter such as a discharge air temperature (DAT) or discharge air flow (DAF) may be regulated in accordance with the selected setting. | 12-17-2009 |
| 20110290229 | Dual Fuel Vent Free Gas Heater - A dual fuel vent free gas heater having at least one gas burner with a plurality of gas outlet ports in an upper surface thereof. The gas outlet ports are in flow communication with at least one pilot flame burner. An adjustable fuel injector or at least two fuel injectors feed fuel to the burner providing for introduction of more than one fuel to the burner. Optionally, an oxygen detection system, manual fuel selection control valve, and/or temperature shut off control system may be incorporated into the dual fuel vent free heater. | 12-01-2011 |
| 20110290228 | WARM AIR FURNACE - A warm air furnace prevents household articles from freezing in the case where combustion is discontinued due to lack of gas during combustion operation when a house is emptied. The warm air furnace is equipped with a retry operation controller | 12-01-2011 |
| 20110100349 | Modulating Gas Furnace - A method controls a modulating gas furnace by monitoring a differential pressure associated with the modulating gas furnace, learning an intermediate value associated with an intermediate capacity between a minimum output capacity of the gas furnace and a maximum output capacity of the gas furnace, learning one of a high value associated with the maximum output capacity and a low value associated with a minimum output capacity, establishing an estimated operating curve using either the intermediate value and the low value or using the intermediate value and the high value, and operating the gas furnace in accordance with the estimated operating curve. | 05-05-2011 |
| 20090314275 | WARM AIR FURNACE - A warm air furnace capable of reliably carry out the fuel consumption conserving operation notwithstanding the condition such as the heating load is provided. The warm air furnace is equipped with an ecology operation setting unit | 12-24-2009 |
| 20110108015 | Gas-Fired Heater with Carbon Dioxide Detector - A portable gas-fired heater comprising a housing, a burner assembly, and a carbon dioxide detector system. The housing is adapted to at least partially enclose a fuel source. The burner assembly is enclosed by the housing. | 05-12-2011 |
| 20100037884 | DUAL FUEL HEATER - A dual fuel heater can couple with one of two fuel sources operating at different pressures. The dual fuel heater can have a first fuel line, a second fuel line, a fluid flow controller, and a combustion chamber. The fluid flow controller can selectively permit flow of a first fuel to either the first fuel line or flow of a second fuel to the second fuel line. The first fuel line can be in communication with a first oxygen depletion sensor orifice and the second fuel line can be in communication with a second oxygen depletion sensor orifice. | 02-18-2010 |
| 20110146651 | Altitude Adjustment for Heating, Ventilating and Air Conditioning Systems - HVAC systems and methods are shown which use volumetric air flow and static pressure calculations that correct for different air densities encountered at different altitudes. With respect to the volumetric airflow rate, the systems and methods disclosed herein adjust the calculation of airflow rate to better match the BTU content of de-rated natural gas used at higher elevations, and therefore they are usable in HVAC systems that combust natural gas. The adjusted static pressure calculations may be used in any type of HVAC system. | 06-23-2011 |
| 20080236561 | Combination gas-fired furnace and gas-powered electrical generator - A combination gas-fired furnace and gas-powered electrical generator. The combination includes a furnace and an electrical generator. The furnace is gas-fired and has electrical components necessary to operate the furnace. The electrical generator is gas-powered, is electrically connected to the furnace, and activates automatically when normal electrical power to the furnace is interrupted so as to allow the electrical components of the furnace to operate when the normal electrical power to the furnace is interrupted thereby allowing the furnace to operate when the normal electrical power to the furnace is interrupted. | 10-02-2008 |
| 20130008423 | FORCED AIR HEATER INCLUDING ON-BOARD SOURCE OF ELECTRIC ENERGY - A forced-air heater having a self-contained on-board electric-power supply, a fuel tank, a support, a housing, a combustion chamber, and a motorized fan. The self-contained on-board electric-power supply may have a generator, a photovoltaic component, or some combination thereof. The fuel tank may be adapted to store a first fuel. The combustion chamber may be adapted to generate heat by combusting the first fuel with air. The motorized fan may be adapted to draw in ambient air through an air intake and force the air into the combustion chamber. | 01-10-2013 |
| 126116000 | Electric auxiliary | 2 |
| 20080314375 | CONDENSATE PAN WITH CONDENSATE TRAP - A condensate pan for a condensing furnace includes a main chamber to receive exhaust gases, a condensate trap separate from the main chamber and internal the condensate pan and a main drain. | 12-25-2008 |
| 20130037013 | BURNER FOR HEATING SYSTEM - A burner for a furnace includes an inner wall defining a central burner chamber. The inner wall includes a plurality of inner wall openings to admit a fuel flow into the central burner chamber. The burner further includes an outer wall which, defines an annulus for the fuel flow to the plurality of inner wall openings. An igniter is located in the central chamber. A furnace includes a heat exchanger and one or more burners disposed at and aligned with one or more burner openings of the heat exchanger. The one or more burners include an inner wall defining a central burner chamber. The inner wall includes a plurality of inner wall openings to admit a fuel flow into the central burner chamber. The one or more burners further include an outer wall defining an annulus for the fuel flow to the plurality of inner wall openings. | 02-14-2013 |
| 20100095945 | DUAL FUEL VENT FREE GAS HEATER - A dual fuel vent free gas heater having at least one gas burner with a plurality of gas outlet ports in an upper surface thereof. The gas outlet ports are in flow communication with at least one pilot flame burner. An adjustable fuel injector or at least two fuel injectors feed fuel to the burner providing for introduction of more than one fuel to the burner. Optionally, an oxygen detection system, manual fuel selection control valve, and/or temperature shut off control system may be incorporated into the dual fuel vent free heater. | 04-22-2010 |
| 20130037014 | HEATER CONFIGURED TO OPERATE WITH A FIRST OR SECOND FUEL - A heater can be configured to operate with either a first fuel at a first pressure or a second fuel at a second pressure. In some embodiments, a pressure regulator unit is configured to regulate the pressure of either the first fuel or the second fuel and to direct either the first fuel or the second fuel towards a combustion chamber. A nozzle assembly can be configured to inject the fuel into the combustion chamber. | 02-14-2013 |
| 20120180774 | MIXING DEVICE FOR MIXING FUEL AND AIR AND FURNACE WITH A MIXING DEVICE - Mixing devices for mixing fuel and air for a premix burner or furnace and furnaces (e.g., premix) with mixing devices. Furnaces may be for heating an occupied space, and may produce lower NOx emissions. A mixing device may be located within an inlet tube, may have a surface that is perpendicular to the direction of fuel flow or that forms a circle, or may have two surfaces held at substantially opposite angles to induce swirl. A portion of the mixing device may extend over an orifice of the fuel injector. A mixing device may be attached to the fuel injector, may be made from a piece of sheet metal, and may have a hole for attachment to the fuel injector. Mixing devices may have a center, two arms, and two ends, which may be separated by bends. A burner plate may be sandwiched between surfaces to allow for expansion. | 07-19-2012 |
| 20130098350 | LOW EMISSIONS DIRECT FIRED AIR HEATER - Method of combusting hydrocarbon fuel to form combustion products low in nitrogen dioxide (NO2) and carbon monoxide (CO) and mixing the combustion products with additional air to provide a heated air stream suitable for heating enclosed spaces includes the following steps: (a) delivering a fuel stream to a burner assembly; (b) delivering a combustion air stream to the burner assembly; (c) combining the fuel and air streams within a combustion chamber and heat exchanger wherein the mixture is ignited, completely combusted, and the temperature of the products of combustion are reduced; (d) providing tempering air to the external side of the combustion chamber and heat exchanger to transfer heat away from the combustion gases to tempering air; (e) combining the partially heated tempering air and cooled combustion products low in NO2 and CO; and (f) discharging the mixture into a space to be heated. | 04-25-2013 |
| 20110283987 | OUTDOOR GAS HEATER - An outdoor gas heater used in the field is provided. The outdoor gas heater includes a primary combustion net having a dual net structure. A wind-proof cover is provided to protect a thermocouple. Fuel gas is concentrated into a fuel gas discharge hole formed in the wind-proof cover so that an initial ignition performance is improved. A support is provided to support the outdoor gas heater from the top surface of a gas container. A fuel gas inlet tube is vertically installed between a head unit and a safety valve while being spaced apart from an adjustment handle, and a fire extinguishing safety device is provided behind the fuel gas inlet tube, so that the fire extinguishing safety device is hidden by the fuel gas inlet tube, thereby minimizing a volume of the gas heater without degrading aesthetic appearance of the gas heater. | 11-24-2011 |
| 20080245354 | Furnace with integrated blower housing and heat exchanger - A combustion furnace includes a blower housing with a centrifugal blower impeller disposed therein and plural heat exchanger tubes disposed substantially around a major portion of the periphery of the impeller. The heat exchanger tubes receive combustion gasses from plural burner nozzles and discharge combustion gasses to a plenum in communication with a motor driven inducer gas pump. The integrated blower housing and heat exchanger may be disposed in a cabinet including support structure for a fuel delivery manifold, associated burner nozzles and forming air inlet and outlet openings for air being circulated by the blower. | 10-09-2008 |
| 20110056476 | BURNING SYSTEM - The present invention refers to an improved burning system for industrial furnace burners (16), more specifically for tunnel type furnaces for firing ceramic materials, to improve the thermal efficiency and reduce the consumption by these furnaces in the process of firing load (10) such as floor tiles, tiles, sanitary material, refractories, porcelain, insulators, grindstone, tableware ceramic, red ceramic and ceramic in general, by a using flame rotation system, providing a radiant flame surface by dividing the flame into smaller intermittent flames. | 03-10-2011 |
| 20120240917 | HEATING APPLIANCE FOR AIR HEATING - A heating appliance including a burner and a heat exchanger including a bundle of heat conducting elements that form the primary channels through which the hot flue gases from the burner are guided via inputs that are opposite the burner, and which are connected together to close off the secondary channels that are formed between the aforementioned elements and through which the air to be heated can be guided. The burner is a premix burner that is positioned opposite the inputs of the primary channels, whereby the burner has a supply for a mixture of fuel and a sufficient quantity of air for the essentially complete combustion of the fuel, and whereby between the burner and the inputs of the primary channels there is a heat shield of a heat-resistant material with a passage opposite each of the aforementioned inputs. | 09-27-2012 |
| 20110247603 | Furnace Vent with Water-Permeable Inner Pipe - A vent system for improving the efficiency and/or reducing emissions of a combustion device is disclosed. The vent system may include an outer pipe and an inner pipe having a longitudinal section that is permeable to water or water vapor and is longitudinally disposed within the outer pipe. The inner pipe defines a first passageway and the outer and inner pipes define a second passageway therebetween. As the moisture and/or heat are transferred from the flue gas to the intake air through the longitudinal section of the inner pipe, the efficiency of the furnace may be improved and the NOx emission of the furnace may be reduced. | 10-13-2011 |
| 20100294257 | Direct-fired heating system - A direct gas-fired heating unit is provided which uses an axial-bladed fan for generating a main air flow through a burner unit. The burner unit has a dedicated combustion air blower supplying combustion air to the burner separate from a main air flow generated by the main fan. The burner unit includes a dedicated blower which draws a small volume of outside air as combustion air. Further, the burner unit may include bypass ports which allows for discharge of bypass air from the burner unit. | 11-25-2010 |
| 20100000508 | OIL-FIRED FRAC WATER HEATER - The present invention overcomes many of the disadvantages of prior art mobile oil field heat exchange systems by providing an oil-fired heat exchange system. The present invention is a self-contained unit which is easily transported to remote locations. The present invention includes a single-pass tubular coil heat exchanger contained within a closed-bottom firebox having a forced-air combustion and cooling system. The rig also includes integral fuel tanks, hydraulic and pneumatic systems for operating the rig at remote operations in ail weather environments. In a preferred embodiment, the oil-fired heat exchanger system is used to heat water on-the-fly (i.e., directly from the supply source to the well head) to complete hydraulic fracturing operations. The present invention also includes systems for regulating and adjusting the fuel/air mixture within the firebox to maximize the combustion efficiency. The system includes a novel hood opening mechanism attached to the exhaust stack of the firebox. | 01-07-2010 |
| 20090145419 | FURNACE HEAT EXCHANGER - The present invention provides an alternative single burner heat exchanger combination for a gas-fired furnace for hot air generation to be used to heat spaces in residential and commercial settings. The fuel fired furnace is compiled of the known set-up of a plurality of spaced heat exchangers wherein each heat exchanger has an inlet port for receipt therein of combustion gases. The single burner is a premix burner providing an excellent combustion of the gas-air mixture. The burner is in fluid communication with each port of each heat exchanger through a dilution zone and a distributor. Preferably, these are all airtight connected to each other as can be seen in FIG. | 06-11-2009 |
| 20120125311 | PREMIX AIR HEATER - A gas-fired heater includes a gas supply line, an air supply line, a valve coupled to the gas supply line and a controller coupled to the valve. The controller is configured to control the valve to control a gas-air mixture. The gas-fired heater also includes a burner configured to receive the gas-air mixture and burn the gas-air mixture, and a heat exchanger coupled to the burner. The heat exchanger is configured to perform a heat exchange process and output heated air. The gas-fired heater further includes a combustion fan located downstream of the heat exchanger, the combustion fan being configured to pull or draw flue gases through the heat exchanger. | 05-24-2012 |
| 20120247444 | Gas-Fired Furnace and Intake Manifold for Low NOx Applications - A gas-fired air conditioning furnace comprises a monolithic intake manifold including an inlet at a first end and a plurality of outlets at a second end opposite the first end. In addition, the furnace comprises a burner assembly including a plurality of burners, each burner is configured to combust an air-fuel mixture at least partially within an interior space of the burner. Further, each burner extends into one of the outlets of the intake manifold. | 10-04-2012 |
| 20120227727 | Hot air heater and blower assembly - A gas-fired heater assembly for use in conjunction with a shrink wrap chamber or tunnel, including a gas-fired heater assembly, said gas-fired heater assembly incorporating an air intake, and having a gas port for injection of combustive gas into the heat chamber for combustion, the heated air combustion directed into the length of an associated heat box, said heat box having a designed opening for uniform dissemination of heated air into a hot air envelop, said hot air envelop being operatively associated with an air circulating blower, said air circulating blower directing air through the regions of the heat box for mixing of the circulating air with the heated air, and directing said mixture of heated air out of the hot air envelop and into the shrink wrap chamber or tunnel for shrinking polymer film about packaged goods for shipment and/or storage. | 09-13-2012 |
| 20120272945 | Auxiliary Heating Duct for an Indirect Fired Heater - An auxiliary duct is supported on the housing of an indirect fired heater of the type having separate heated air and combustion air passages. The auxiliary duct extends between an inlet end at the heated air discharge to an outlet end adjacent a burner assembly at the combustion air inlet so as to be arranged to direct a portion of the flow of air heated by the heater towards components of the burner assembly including fuel lines, a fuel pump, a fuel filter and a combustion air intake blower for heating the burner assembly and associated components to improve the operation thereof in colder climates. | 11-01-2012 |
| 20120080024 | HEATER CONFIGURED TO OPERATE WITH A FIRST OR SECOND FUEL - A heater can be configured to operate with either a first fuel at a first pressure or a second fuel at a second pressure and can include a fluid flow controller. In some embodiments, the fluid flow controller is configured to permit flow of fuel to a first passageway and to direct a first fuel to a first oxygen depletion sensor line when the controller is in a first position and permit the flow of fuel to a second passageway and to direct a second fuel to a second oxygen depletion sensor line when the controller is in a second position. | 04-05-2012 |
| 20120090591 | GAS FURNACE CONDENSATE COLLECTOR BOX - A condensate collector box includes a furnace mounting plate having a first edge portion, a second edge portion that extends from the first edge portion, at least one vent drain channel that extends along one of the first and second edge portions, and a heat exchanger condensate collection area. The condensate collector box also includes an inducer fan mounting member having a first surface and opposing second surface arranged upon the furnace mounting plate to form a condensate collection zone. The inducer fan mounting member includes at least one inducer fan drain passage that is fluidly connected to the at least one vent drain channel | 04-19-2012 |
| 20110146652 | DIRECT FIRED HEATERS WITH IN-SHOT BURNERS, TUBULAR COMBUSTION CHAMBERS, AND/OR VARIABLE VENTURI - Exemplary embodiments of the present disclosure include direct fired heaters and methods relating to the operation of direct fired heaters. An exemplary embodiment of a direct fired heater generally includes one or more in-shot burners and one or more combustion tubes configured to receive combustion air emanating from the one or more in-shot burners. The direct fired heater includes a passageway having an inlet configured to receive or intake a circulating air flow. The passageway may include a venturi portion downstream of the inlet in fluid communication with the exit ends of the combustion tubes. The flow of circulating air through the venturi portion may induce flow of combustion air through the one or more combustion tubes. | 06-23-2011 |
| 20090044794 | Inducer speed control method for combustion furnace - In a multistage combustion furnace having a motor driven inducer blower and a pressure sensing device or set of switches for sensing pressure in the combustion gas flowpath through the furnace, a high firing rate blower speed and low firing rate blower speed are set based on the blower speed setting required for a medium firing rate. Each particular furnace, having its own pressures and combustion gas resistance to flow characteristics, may be provided with a database of inducer blower motor speeds required to achieve predetermined pressures in the combustion gas flowpath for a variety of combustion gas venting systems generating such resistance. | 02-19-2009 |
| 20090308372 | SELECTABLE EFFICIENCY VERSUS COMFORT FOR MODULATING FURNACE - A furnace controller for a modulating furnace that helps provide a balance between energy efficiency and occupant comfort across various burner firing rates and/or across various circulating blower speeds. In some cases, the furnace controller can be configured to permit a user to customize operation of the furnace in accordance with their particular needs and/or desires with respect to efficiency and comfort. A selection may be made between an energy efficiency setting and a user comfort setting. Then, a plenum parameter such as a discharge air temperature (DAT) or discharge air flow (DAF) may be regulated in accordance with the selected setting. | 12-17-2009 |
| 20110290229 | Dual Fuel Vent Free Gas Heater - A dual fuel vent free gas heater having at least one gas burner with a plurality of gas outlet ports in an upper surface thereof. The gas outlet ports are in flow communication with at least one pilot flame burner. An adjustable fuel injector or at least two fuel injectors feed fuel to the burner providing for introduction of more than one fuel to the burner. Optionally, an oxygen detection system, manual fuel selection control valve, and/or temperature shut off control system may be incorporated into the dual fuel vent free heater. | 12-01-2011 |
| 20110290228 | WARM AIR FURNACE - A warm air furnace prevents household articles from freezing in the case where combustion is discontinued due to lack of gas during combustion operation when a house is emptied. The warm air furnace is equipped with a retry operation controller | 12-01-2011 |
| 20110100349 | Modulating Gas Furnace - A method controls a modulating gas furnace by monitoring a differential pressure associated with the modulating gas furnace, learning an intermediate value associated with an intermediate capacity between a minimum output capacity of the gas furnace and a maximum output capacity of the gas furnace, learning one of a high value associated with the maximum output capacity and a low value associated with a minimum output capacity, establishing an estimated operating curve using either the intermediate value and the low value or using the intermediate value and the high value, and operating the gas furnace in accordance with the estimated operating curve. | 05-05-2011 |
| 20090314275 | WARM AIR FURNACE - A warm air furnace capable of reliably carry out the fuel consumption conserving operation notwithstanding the condition such as the heating load is provided. The warm air furnace is equipped with an ecology operation setting unit | 12-24-2009 |
| 20110108015 | Gas-Fired Heater with Carbon Dioxide Detector - A portable gas-fired heater comprising a housing, a burner assembly, and a carbon dioxide detector system. The housing is adapted to at least partially enclose a fuel source. The burner assembly is enclosed by the housing. | 05-12-2011 |
| 20100037884 | DUAL FUEL HEATER - A dual fuel heater can couple with one of two fuel sources operating at different pressures. The dual fuel heater can have a first fuel line, a second fuel line, a fluid flow controller, and a combustion chamber. The fluid flow controller can selectively permit flow of a first fuel to either the first fuel line or flow of a second fuel to the second fuel line. The first fuel line can be in communication with a first oxygen depletion sensor orifice and the second fuel line can be in communication with a second oxygen depletion sensor orifice. | 02-18-2010 |
| 20110146651 | Altitude Adjustment for Heating, Ventilating and Air Conditioning Systems - HVAC systems and methods are shown which use volumetric air flow and static pressure calculations that correct for different air densities encountered at different altitudes. With respect to the volumetric airflow rate, the systems and methods disclosed herein adjust the calculation of airflow rate to better match the BTU content of de-rated natural gas used at higher elevations, and therefore they are usable in HVAC systems that combust natural gas. The adjusted static pressure calculations may be used in any type of HVAC system. | 06-23-2011 |
| 20080236561 | Combination gas-fired furnace and gas-powered electrical generator - A combination gas-fired furnace and gas-powered electrical generator. The combination includes a furnace and an electrical generator. The furnace is gas-fired and has electrical components necessary to operate the furnace. The electrical generator is gas-powered, is electrically connected to the furnace, and activates automatically when normal electrical power to the furnace is interrupted so as to allow the electrical components of the furnace to operate when the normal electrical power to the furnace is interrupted thereby allowing the furnace to operate when the normal electrical power to the furnace is interrupted. | 10-02-2008 |
| 20130008423 | FORCED AIR HEATER INCLUDING ON-BOARD SOURCE OF ELECTRIC ENERGY - A forced-air heater having a self-contained on-board electric-power supply, a fuel tank, a support, a housing, a combustion chamber, and a motorized fan. The self-contained on-board electric-power supply may have a generator, a photovoltaic component, or some combination thereof. The fuel tank may be adapted to store a first fuel. The combustion chamber may be adapted to generate heat by combusting the first fuel with air. The motorized fan may be adapted to draw in ambient air through an air intake and force the air into the combustion chamber. | 01-10-2013 |
| 126117000 | Preliminary air heater | 1 |
| 20130019850 | ENHANCED RADIATIVE TRANSFER AND HEAT RECOVERY FOR COMBUSTION DEVICE - A stove includes a combustion chamber for producing heat, a thermoelectric device thermally coupled to a hot source and a cold source, a battery, a fan electrically connected to the thermoelectric device and the battery, and a controller configured to monitor the battery and thermoelectric device and configured to direct the fan be operated from power provided from the battery when power produced from the thermoelectric device is insufficient to power the fan. The stove can have an associated heating plate, and the walls of the combustion chamber can be configured to reflect heat onto the heating plate. | 01-24-2013 |
| 126109000 | Tubular air heater | 1 |
| 20120240916 | Multiple Barrel Forced Air Heater - A multiple barrel forced-air heater comprising a base, a first heater jacket, and a second heater jacket. The base may comprise a fuel tank adapted to accept a fuel. The first heater jacket may comprise a first device for producing a first air flow, a first Venturi adapted to mix fuel with the first air flow to form a first fuel-air mixture, and a first combustion site adapted to combust the first fuel-air mixture to generate a first amount of heat and a first amount of combustion products. The second heater jacket may comprise a second device for producing a first air flow, a second Venturi adapted to mix fuel with the second air flow to form a second fuel-air mixture, and a second combustion site adapted to combust the second fuel-air mixture to generate a second amount of heat and a second amount of combustion products. | 09-27-2012 |
| 126112000 | Feeding air | 15 |
| 20130042851 | Furnace Control System and Method - A method for operating a furnace system includes initiating a start sequence comprising starting an inducer fan operative to induce an air flow through a burner assembly, a heat exchanger portion and a collector portion, determining whether an air pressure in the collector portion is above a first threshold value, starting a furnace ignition sequence including providing fuel to the burner assembly, igniting a fuel and air mixture and starting an ignition timer responsive to determining that the air pressure in the collector portion is above the first threshold value, determining whether the ignition timer has expired, determining whether the air pressure in the collector portion is above a second threshold value responsive to determining that the ignition timer has expired, and stopping the provision of fuel to the burner assembly responsive to determining that the air pressure in the collector portion is not above the second threshold value. | 02-21-2013 |
| 20100175679 | Hot-Air Furnace Module and Hot-Air Furnace - The invention relates to a hot-air furnace module having a furnace space, which is at least partially delimited by walls and is assigned an air-delivery device for producing an airstream and a heat-transfer device for heating the airstream. According to the invention, an incoming-air channel is provided, which is formed between the air-feed device and the furnace space for guiding the airstream delivered by the air-feed device and which is provided with first and second throttle means, which are arranged at a distance from one another in the direction of flow and are intended to even out the airstream before it flows through the furnace space. Furthermore, according to the invention a hot-air furnace is formed from hot-air furnace modules which are rotated through 180 degrees with respect to one another and are in communication with one another. | 07-15-2010 |
| 20110283986 | Apparatus for Improved Efficiency of an Air Conversion Device - An apparatus includes a housing including a first side having a first opening and a second side having a second opening. At least one fan creates an airflow through the housing between the first opening and the second opening. A motor activates the at least one fan to create the airflow. A control mechanism controls the motor. A mounting for the housing enables the apparatus to direct the airflow about an air conversion device, thereby increasing an efficiency of the air conversion device. | 11-24-2011 |
| 20100126491 | BURNER FOR COMBUSTION OF FUEL IN PELLET OR GRANULAR FORM - A burner for fuel in pellet or granular form in which the fuel has a high ash content, for example grass or hay pellets in which the ash content is 5% or more. The burner has a combustion chamber with a grate at its lower end, into which fuel and air are fed, the combustion chamber having a hot gas outlet for exhausting combustion gases. The grate is provided with a rotary member having upstanding vanes which is adapted to continually move ash or clinker on the grate through outlet apertures spaced around the grate. The grate is a generally planar, horizontal surface which is imperforate apart from the outlet apertures; air inlet ports are arranged in a circumferential wall surrounding the grate. | 05-27-2010 |
| 20100212651 | Alternate intake apparatus - The present invention relates generally to 90% Annual Fuel Utilization Efficiency gas or oil burning devices that depend on external air for combustion. More particularly it discloses an alternate intake apparatus for air for combustion that opens automatically when the inlet air conduit from outside is blocked or severely restricted. | 08-26-2010 |
| 20120192849 | FURNACE WITH PRIMARY AND SECONDARY HEAT EXCHANGERS - A furnace that includes a heater configured to heat a fluid and discharge a heated fluid flow, a first heat exchanger at least partially positioned in a air duct and in fluid communication with the heater to receive the heated fluid flow, and a second heat exchanger at least partially positioned in the air duct and in fluid communication with the first heat exchanger so that the heated fluid flow flows through the second heat exchanger after flowing through the first heat exchanger. The first heat exchanger and the second heat exchanger are arranged in the air duct so that the flow of air travels through the first heat exchanger to transfer heat between the heated fluid flow and the flow of air, and then through the second heat exchanger after the first heat exchanger to transfer heat between the heated fluid flow and the flow of air. | 08-02-2012 |
| 20110174291 | CLAMSHELL HEAT EXCHANGER - A clamshell heat exchanger includes a first clamshell half and a second clamshell half. When joined, the first and second clamshell halves form a passageway having an inlet and an outlet. The passageway has a height and a depth. A ratio of the height to the depth is about 0.5 or less. The heat exchanger has an efficiency of at least about 70%. | 07-21-2011 |
| 20120199109 | Method And System For Variable Speed Blower Control - A method of controlling a blower motor in a furnace includes applying control signals to the blower motor; determining that a reference airflow through a portion of the furnace is present; determining a reference control signal at which the reference air flow is present; receiving a requested airflow; computing a requested control signal in response to the reference air flow, the reference control signal and the requested airflow; and using the requested control signal to control the blower motor. | 08-09-2012 |
| 20110297139 | WARM AIR FURNACE - A drain pipe | 12-08-2011 |
| 20110303211 | Efficient Forced Air Heater - Provided is a forced air heater. The forced air heater may comprise a housing defining a duct. The duct may be adapted for a flow of fluid therethrough. The heater may be adapted to provide a flow of fluid through the duct that is substantially laminar or transient. | 12-15-2011 |
| 20120304977 | Integrated Structure of Air Heater - An integrated structure of an air heater includes at least an air blowing unit, at least an air passage housing, a heating arrangement, and a overheat protection unit, which are fastened with each other to form the integrated structure, wherein the air blowing unit and the overheat protection unit are respectively fastened with the air passage housing, and the air passage housing is connected to the heating arrangement with screws. A simple and compact integrated structure for air heater is provided wherein its assembling method is easy and its manufacturing cost is low. | 12-06-2012 |
| 20120012092 | AUTO CURE VARIABLE FAN DRIVE CONTROL SYSTEM AND ASSOCIATED METHODS - Methods and systems for controlling air characteristics for storage facilities. A controller and temperature sensors can detect an external temperature and compare it to a reference temperature. Depending on the relationship between the external temperature and the reference temperature (e.g. warmer or colder) the controller can initiate a burner, open an air intake, and operate fans to achieve desirable conditions within the facility efficiently. | 01-19-2012 |
| 20110094492 | DEVICE FOR FEEDING WATER STEAM VIA A HEAT EXCHANGER IN A COMBUSTION CHAMBER AND A METHOD - The invention relates to a device for feeding heated water steam via a heat exchanger in a thermal engine and method for using said device. | 04-28-2011 |
| 20120080023 | Method And System For Controlling An Inducer In A Modulating Furnace - A furnace includes an induced draft blower; an inducer motor driving the induced draft blower; and a furnace control determining a modulation percentage, the furnace control controlling RPM of the inducer motor in response to the modulation percentage. | 04-05-2012 |
| 20100078007 | High Efficiency Furnace/Air Handler Blower Housing with a Side Wall Having an Exponentially Increasing Expansion Angle - An air distribution blower housing for an air handler such as a residential furnace is designed with a volute-shaped outer wall that has an exponentially increasing expansion angle in the direction of air flow through the blower housing for at least a portion of the volute-shaped outer wall length. This results in the blower housing having an enlarged air outlet opening that slows down and spreads out the air flow from the blower housing over a greater area of the furnace heat exchanger. The blower housing thereby enables less air pressure drop through the heat exchanger, which increases the efficiency of the blower motor operation. The design of the blower housing also efficiently turns the velocity head of the air flow through the housing to usable static air pressure at the housing air outlet. | 04-01-2010 |
| 126114000 | Casings | 2 |
| 20090044793 | FURNACE BURNER BOX - A burner box for a furnace. The burner box includes a housing attached to the furnace. The burner box further includes a module configured to align and support a burner within the housing. The module is detachable from the housing and removable from the furnace burners. The module is detachable from the housing without disassembly or detachment of the housing from the furnace. | 02-19-2009 |
| 20120085334 | FURNACE ASSEMBLY - A furnace includes a cabinet having a top plate and a blower located in the cabinet. A blower shelf is located in the cabinet and has a first side supportive of the blower and a second side including one or more canted slide rails. A heat exchanger is located in the cabinet between the blower and the top plate and is securable to the one or more canted slide rails. The one or more canted slide rails are configured to allow removal of the heat exchanger from the cabinet along the canted slide rails without removal of the top plate from the cabinet. | 04-12-2012 |
| 126099000 | Tubular heater | 2 |
| 20080314378 | HEAT EXCHANGER - A furnace or other heat exchanger application for heating, ventilation, air conditioning and refrigeration systems having condensate control. Specifically, the disclosure includes condensate control for secondary heat exchangers for use with high efficiency furnaces, particularly for small tonnage systems, such as residential or unitary systems. The application provides condensate management to permit a plurality of furnace orientations while providing resistance to corrosion due to liquid condensate, while providing a furnace system that utilizes less expensive materials and is easily fabricated. | 12-25-2008 |
| 20080257336 | Furnace with Integrated Blower Housing and Heat Exchanger - A combustion furnace includes a blower housing with a centrifugal blower impeller disposed therein and plural heat exchanger tubes disposed substantially around a major portion of the periphery of the impeller. The heat exchanger tubes receive combustion gasses from plural burner nozzles and discharge combustion gasses to a plenum in communication with a motor driven inducer gas pump. The integrated blower housing and heat exchanger may be disposed in a cabinet including support structure for a fuel delivery manifold, associated burner nozzles and forming air inlet and outlet openings for air being circulated by the blower. | 10-23-2008 |
| 20090293867 | COMBUSTION BLOWER CONTROL FOR MODULATING FURNACE - A furnace includes a combustion blower and one or more pressure switches. In some cases, the one or more pressure switches may be used to calculate one or more operating points for the combustion blower. Additional operating points may be calculated by interpolation and/or extrapolation, as appropriate. The furnace may temporarily alter these operating points as necessary to keep the furnace safely operating in response to minor and/or transient changes in the operating conditions of the furnace. | 12-03-2009 |
| 20120055465 | CONDENSATE PAN WITH CONDENSATE TRAP - A condensate pan for a condensing furnace includes a main chamber to receive exhaust gases, a condensate trap separate from the main chamber and internal the condensate pan and a main drain. | 03-08-2012 |
| 20090056705 | COMBUSTION SYSTEM - A combustion system includes: a furnace housing defining a combustion chamber therein and having a gas outlet in fluid communication with the combustion chamber; a plenum housing surrounding and cooperating with the furnace housing to define a plenum chamber therebetween, and having an air inlet and an air outlet which are in fluid communication with the plenum chamber; and a heat exchanger housing disposed outwardly of the plenum housing and having an air inlet in fluid communication with the air outlet of the plenum housing, an air outlet, a gas inlet in fluid communication with the gas outlet of the furnace housing, and a gas outlet. | 03-05-2009 |
| 20080283047 | Radiant heater assembly - A radiant tube heater assembly includes a housing containing a blower and a burner, which is aligned with an opening in the housing through which a flame and products of combustion flow into a U-shaped burner tube. The closed downstream end of the burner tube is in close proximity to the housing. In order to prevent or reduce the likelihood of the products of combustion entering the blower, an exhaust tube is mounted in a downstream leg of the burner tube and extends outwardly through the U-shaped outer end of the tube remote from the housing. | 11-20-2008 |
