Class / Patent application number | Description | Number of patent applications / Date published |
122180300 | Fire tube or flue surrounded by water containing chamber | 41 |
20080216772 | HIGH EFFICIENCY WATER HEATER - A collector assembly is provided for directing products of combustion between segments of a flue of a water heater. The assembly includes an insulator at least partially defining a chamber configured to direct products of combustion between the flue segments. The assembly also includes a cover configured to at least partially surround the insulator. The cover is also configured to be coupled to a water tank of the water heater. The insulator in an uncompressed state is dimensioned to extend outwardly from the cover when the insulator is positioned in the cover. The insulator in a compressed state is dimensioned to permit coupling of the cover to the water tank. | 09-11-2008 |
20080251035 | Burner Flashback Detection and System Shutdown Apparatus - A fuel-fired water heater is provided with a premixing type main burner and an associated pilot burner for igniting it. A specially designed protective system is operative to detect a flame flashback burning condition in the main burner and responsively shut down the water heater. In one embodiment thereof, the protective system uses main burner body heat to melt a portion of a fuel supply line connected to the pilot burner during a flame flashback condition in the main burner. Such melting responsively causes an associated fuel supply valve to close and terminate water heater operation. In a second protective system embodiment a normally closed pressure switch is opened, thereby shutting down the water heater, when the switch detects a pressure indicative of a flame flashback condition in the main burner. | 10-16-2008 |
20080264356 | WATER HEATER - To provide a water heater capable of suppressing an increase of combustion air temperature and suppressing to generate nitrogen oxide with an easy structure. In a water heater, a burner provided in a combustion chamber provided below a hot water storage chamber is an all primary air burner taking in air required for combustion, where the air is mostly primary air. Further, the burner is provided with a supporting plate in the combustion chamber at the height that a part of a burner head is protruded into a space covered by a lower mirror plate. | 10-30-2008 |
20090151653 | Water Heater with Condensing Flue - A water heater has a burner positioned below a vertical centrally located flue with heat exchange capacity enhanced by a multiplicity of rectangular metal fins which are welded on the inside of the vertical central flue. The central flue extends upwardly within a water tank. The central flue transitions to a smaller diameter downwardly draining helically coiled condensing flue. Approximately 80% of the heat from the combustion gases is transferred to the water within the water tank through the wall of the central flue without condensation. An additional 10% or more of the combustion heat is transferred to the water accompanied by condensation of water in the coiled flue. A fan draws the combustion gases through the central flue and the coiled condensing flue and supplies the combustion gases to an exterior vent. | 06-18-2009 |
20090165733 | Inwardly firing burner and uses thereof - An inwardly firing burner design is shown which can be used in a variety of heating applications. A water heater apparatus is also shown which includes a water heating tank having generally cylindrical sidewalls with upper and lower ends, each of which is closed by a transverse wall section to define a closed tank interior. The tank also has a water inlet and a water outlet. A plurality of vertically arranged fire tubes are connected between the upper and lower transverse wall sections, each fire tube having an open interior for conducting products of combustion. A burner assembly is mounted on the tank which features the inwardly firing construction that eliminates the need for an external combustion chamber. | 07-02-2009 |
20090211540 | FUEL-FIRED, POWER VENTED HIGH EFFICIENCY WATER HEATER APPARATUS - A fuel-fired water heater has a draft inducer fan assembly with a housing having an inlet for receiving hot combustion gases discharged from the water heater, and an outlet for discharging the combustion gases. A normally closed damper member within the housing is openable by fluid pressure force created by operation of a draft inducer fan portion of the assembly. With the damper in its open position the fan exhausts the received combustion gases through a housing outlet. When the damper closes it prevents convective outflow through the housing outlet of flue-heated air. In alternate embodiments of the assembly the fan is operative to also draw in dilution air that cools the fan motor and the discharged combustion gases, with the assembly having an internal configuration preventing convective outflow of flue-heated air through the housing dilution air inlet during standby periods of the water heater. | 08-27-2009 |
20090241858 | WATER HEATER WITH HIGH EFFICIENCY BAFFLES - A water heater for exchanging heat between hot gasses and water within the water heater. The water heater includes a water tank, a conduit for allowing flow of the gasses therethrough, the conduit extending through the tank and promoting heat exchange between the gasses and water in the tank, and a baffle extending within the conduit for affecting the flow of the gasses. The baffle includes a sheet bent in a zig-zag manner and having a number of plate sections. Each plate section has a through-flow portion allowing the gasses to flow therethrough. The sheet also has a number of first bends and a number of second bends, the first bends alternating with the second bends such that each plate section is defined between one first bend and one second bend. | 10-01-2009 |
20090308333 | REMOVABLE HEAT EXCHANGER FOR A GAS FIRED WATER HEATER - A water heater. The water heater includes a water tank having a tank wall defining an interior space and adapted to contain water to be heated, a tank extension having an extension wall detachably mounted to the tank wall, the extension wall defining extension space communicating with the interior space, and defining an extension axis, an air inlet at least partially in the extension space extending through the extension wall at a radial angle to extension axis of tank extension, a combustor at least partially in the extension space and in fluid communication with the air inlet, and a plurality of heat exchange tubes configured to receive products of combustion from combustor and extending into interior space of the water tank. The extension space is configured to be flooded with water from the water tank. | 12-17-2009 |
20100043728 | WATER HEATER - A storage-type water heater includes a tank enclosing a volume of water, the tank having an upper portion and a lower portion, a chamber adjacent the lower portion of the tank and adapted to at least partially enclose a source of a heated fluid, and a helical tube heat exchanger at least partially enclosed within the tank and fluidly connected to the chamber. The helical tube directs the heated fluid from the lower portion to the upper portion of the tank and promotes heat exchange between the water in the tank and the heated fluid flowing therethrough. | 02-25-2010 |
20100269766 | WATER HEATER WITH ENHANCED THERMAL EFFICIENCY - A water heater with enhanced thermal efficiency includes a heat exchange tank, a water tank that houses the heat exchange tank and shields and isolates the heat exchange tank with a surrounding curtain of water flowing therethrough, a burner, and a blower. The burners is connected to a combustible gas outlet opening of the blower and extends from a central base of the heat exchange tank up into the heat exchange tank to form a combustion chamber within an internal cavity of the heat exchange tank. A plurality of radially arranged flame tubes extends downward from a top corner of the internal cavity and is enclosed by the water flowing inside the water tank. The flame tubes are extended to communicate an exhaust gas discharge tube set circumferentially of and separated from the base for discharging gas. Water inlet and outlet are respectively provided to the water tank. | 10-28-2010 |
20100282186 | HEAT EXCHANGER ELEMENT WITH A COMBUSTION CHAMBER FOR A LOW CO AND NOX EMISSION COMBUSTOR - The present invention provides a new heat exchanger element comprising a premix burner with an outward curved or ridged burner surface. The heat exchanger element further comprises a combustion chamber. The combustion chamber is bound on one side by the burner and is further made up of water cooled metal walls which, starting from the burner and in downstream direction, first widen and thereafter narrow down to the width of a customary heat exchanger element. This creates enough space for a proper combustion, avoiding dead angles and recirculation or too early ending of the combustion reaction, thereby reaching low emissions of NOx and CO. | 11-11-2010 |
20110146594 | Fire Tube Heater - A fire tube heater apparatus includes a shell, with a tube bundle received in the shell and a burner section communicated with the tube bundle. The tubes in the tube bundle have circular inlet and outlet end portions with a flattened, serpentine intermediate portion. The intermediate portion has a width greater than the inlet outside diameter and a tube thickness transverse to the width less than the inlet outside diameter. | 06-23-2011 |
20120291719 | Water Heater with Multiple Heat Exchanging Stacks - A water heater has a tank having an upper and a lower domes which are penetrated by tubular flues in a 1-1-5 arrangement of a first flue connected to a second flue which in turn is connected to tertiary condensing flues. A gas-fired burner on the upper dome fires into the first flue. Both the first and second flue have heat exchange capacity enhanced by a multiplicity of rectangular metal fins welded in a helical arrangement. Some or all of the fins in the first flue may be stainless steel, while the remaining fins may be a different material, such as mild steel. The first and second flues are arranged to remove approximately 82-89 percent of the heat generated by the burner with minimal or no formation of condensate. Approximately 5.5-9 percent of the heat generated by combustion in the burner is removed in third flues where condensation takes place. | 11-22-2012 |
20140033994 | CONDENSING GAS WATER HEATER - A condensing gas water heating device includes a frame, a main heat exchanger and a condensing heat exchanger. The frame, main heat exchanger, and a condensing heat exchanger all are made of stainless steel. The main heat exchanger and the condensing heat exchanger are integrally welded with the flue of the frame along the flue gas flow path to form a heat exchanger assembly. A condensed water collector is arranged between the main heat exchanger and the condensing heat exchanger. By welding the frame, main heat exchanger and condensing heat exchanger, which are made of stainless steel, into the integrally structured heat exchanger assembly, the present invention simplifies the structure and processing technology of the heat exchanger assembly, saves the installation space and materials of the heat exchanger assembly, and improves the corrosion resistance of the heat exchanger assembly. | 02-06-2014 |
20140053791 | Downfired High Efficiency Gas-Fired Water Heater - A high efficiency downfired gas water heater is provided which has a tank for storing water to be heated, a combustion chamber extending downwardly through a top end of the tank, and a gas burner operative to create hot combustion products within the combustion chamber. At the bottom end of the tank is a transfer chamber coupled to an external discharge conduit and to a single pass heat exchanger, in the form of multiple flue tubes. extending vertically through the tank and connected to the combustion chamber. In one embodiment of the water heater the burner is a power burner which forces the combustion products sequentially through the combustion chamber, heat exchanger, transfer chamber and discharge conduit. In another embodiment of the water heater a draft inducer fan is used to draw the combustion products through this path from the combustion chamber. | 02-27-2014 |
20140137813 | WASTE HEAT CAPTURE FROM A DUAL FUEL GAS AND ELECTRIC WATER HEATER - A dual fuel—gas fuel and electric heat pump—water heater is provided that captures waste heat from the exhaust flue of the gas fuel heating system and utilizes it in the evaporator of the electric heat pump. Multiple mechanisms are disclosed for the transfer of heat from the exhaust flue gases to the evaporator. Heat from the exhaust gas that would otherwise be lost is used to help heat refrigerant in the evaporator to improve the efficiency of the system. This heat can also be used to prevent or remove frozen condensate on the evaporator. | 05-22-2014 |
20140245971 | WATER HEATER - An apparatus for heating water comprises a tank formed by a tank wall and having a water inlet and a water outlet and a water collection pan in a bottom portion thereof and a burner located through a wall of the tank so as to position a flame originating therefrom above a surface of water located in the collection pan. The apparatus further includes an exhaust pipe extending from the tank, at least one water distribution manifold sized to be located in the exhaust pipe of the water heater in fluidic communication with a water supply and having a plurality of ports therein to distributed water therethrough and at least one permeable layer supported below the at least one water distribution manifold. | 09-04-2014 |
20140245972 | Heat Exchanger for an Oil Storage Tank - A heating assembly for heating a liquid storage tank includes a heat exchanger tank supported in one wall of the storage tank to extend into the storage tank in contact with liquid stored therein. The heat exchanger tank contains a heat exchanger fluid therein which is heated by a heating apparatus extending through the heat exchanger tank whereby heat is only transferred to the liquid in the storage tank through the heat exchanger fluid. The heating apparatus extending through the heat exchanger tank may be a burner tube or an electrical resistance-type heating element according to different embodiments of the invention. | 09-04-2014 |
20140290590 | CONDENSING TYPE HOT WATER BOILER - A condensing type hot water boiler comprises: a firebox casing that formulates a firebox in which fuel is combusted; a burner that ignites fuel furnished in the upper part of said firebox casing; a ventilator that supplies air to said firebox; a heat exchange casing, wherein heat is exchanged between hot water and the flame and combustion gas flowing in from said firebox, located at the lower part of said firebox casing; and a hot water coil formed to cover the inner wall of said firebox casing and in which hot water is received in the interior from said heat exchange casing for heat exchange with flame and combustion gas of the interior of said firebox. | 10-02-2014 |
20150007779 | SPIRAL FINNED COIL CONDENSING HEAT EXCHANGER - A heat exchanger for supplying heat includes a housing, a bundle of helical fin-coil tubes, and a flue channel. The housing includes a burner, a water inlet, a water outlet and a flue gas outlet. The burner is disposed on a top portion of the housing and connected to an air/gas mixture unit. The bundle of helical fin-tube coils is disposed tightly, circularly, and coaxially around the burner. The flue channel is disposed below the burner and is formed by a plurality of helical fin-tube coils. A flow of flue gas vents from the flue channel to the flue gas outlet. The water inlet is connected to the plurality of helical fin-tube coils which forms the flue channel below the burner. The plurality of helical fin-tube coils below the burner are connected to the bundle of helical fin-tube coils. The bundle of helical fin-tube coils are connected to the water outlet. | 01-08-2015 |
20150007780 | COIL AND SERPENTINE BENT FIN TUBE CONDENSING HEAT EXCHANGER - A heat exchanger for supplying heat includes a housing, a bundle of helical fin-coil tubes, and a flue channel. The housing includes a burner, a water inlet, a water outlet and a flue gas outlet. The burner is disposed on a top portion of the housing and connected to an air/gas mixture unit. The bundle of helical fin-tube coils is disposed tightly, circularly, and coaxially around the burner. The flue channel is disposed below the burner and is formed by a plurality of serpentine bent fin-tube coils. A flow of flue gas vents from the flue channel to the flue gas outlet. The water inlet is connected to the plurality of serpentine bent fin-tube coils which forms the flue channel below the burner. The plurality of serpentine bent fin-tube coils below the burner are connected to the bundle of helical fin-tube coils. The bundle of helical fin-tube coils are connected to the water outlet. | 01-08-2015 |
20150144075 | WATER HEATER HAVING A DOWN FIRED COMBUSTION ASSEMBLY - Disclosed is a water heater that has a water storage tank, a first pass flue tube extending from a top of the water storage tank to a bottom of the water storage tank, a down-fired burner assembly positioned to direct combustion gases into the first pass flue tube, a plurality of second pass flue tubes extending from the bottom of the water storage tank to a top of the water storage tank, and an expansion chamber positioned below the bottom of the water storage tank. The expansion chamber receives the combustion gases from the first pass flue tube and delivers the combustion gases to the second pass flue tubes. The water heater operates with a non-positive vent static pressure and with a vent gas temperature that avoids or reduces excessive condensate production in an exhaust vent connected to receive combustion gases from the water heater | 05-28-2015 |
20150323222 | Heat Exchanger Device and System Technologies - A disclosed heat exchanger device for a heat exchanging fluid comprises a continuous conduit arranged in an Nth pass plurality of descending rows and columns interconnected at at least one transitional point(s). The transitional point(s) are arranged in a pattern of parallel U-tubes which in any two adjacent rows slope in the same direction wherein an end view of the first transitional points resembles a herringbone pattern. A heat exchanger system disclosed comprises a continuous conduit or a plurality of fluid channeling conduits arranged in a lattice of rows and columns, wherein an outside cross section of the conduit is polygonal, especially square but having an inner circumference, a.k.a. Square Pipe™. An outside shell for the conduit is adapted to contain and to channel a fluid therein. A plurality of heat deflectors and flow channeling baffles are arranged adjacent the conduits in a free-floating relationship to the conduits. | 11-12-2015 |
20150369516 | FACILITY FOR PRODUCING A HOT LIQUID, IN PARTICULAR HOT WATER - A facility for producing a hot liquid comprising a primary exchanger extending into a vessel, said primary exchanger being formed by a substantially cylindrical inner wall and a substantially outer wall, at least one of which having at least two circular ribs. | 12-24-2015 |
20160097561 | MOBILE WATER HEATING APPARATUS - Mobile water heating systems for producing hot water are disclosed herein. In one embodiment, a mobile water heating system includes a water heater having an oval-cylindrical shape. The water heater includes a shell, a lid and a water reservoir having a screen. A first heating coil and a second heating coil can extend between the screen and a first cone and a second cone, respectively. A first burner and a second burner can be configured to mix and combust fuel and air and direct the resulting flames through the heating coils. Pall rings can at least partially fill an interior volume of the water heater and the combustion of the fuel and air can heat the heating coils and the pall rings. Water can be heated by being directed through the heating coils and through a water manifold positioned to spray water on the pall rings. | 04-07-2016 |
122180310 | Penetrates one side of water chamber to another | 16 |
20110214621 | HIGH EFFICIENCY GAS-FIRED WATER HEATER - The efficiencies of illustrative embodiments of vertical center flue type fuel-fired base water heaters are improved by installing in the water heaters variously configured tubular condensing type secondary heat exchangers of smaller diameters than the associated center flues. The efficiency increases are achieved with components and manufacturing processes similar to those utilized in the base water heaters and secondary heat exchanger materials similar to those in the tank portions of the base water heaters. | 09-08-2011 |
20120180737 | GAS-FIRED WATER HEATER WITH AN EXHAUST ASSEMBLY - An exhaust assembly for use with a gas-fired water heater that includes a hood for receiving exhaust gas from the gas-fired water heater, a housing, and a fan positioned in the housing to move exhaust gas from the hood out of the exhaust outlet. The hood includes a first hood mounting location and a second hood mounting location. The housing includes an exhaust outlet and a housing mounting location. In a first configuration, the exhaust outlet faces a first direction and the housing mounting location is aligned with and secured at the first hood mounting location. In a second configuration, the exhaust outlet faces a second direction different than the first direction and the housing mounting location is aligned with and secured at the second hood mounting location. | 07-19-2012 |
20130019816 | FUEL-FIRED WATER HEATER WITH AIR DRAFT INDUCER AND FLUE HEAT EXCHANGER - A fuel-fired water heater has a tank which holds a reserve of water to be heated by a burner located in a sealed combustion chamber disposed under a bottom heat transfer wall of the tank. A combustion gas exhaust flue extends vertically through the center of the tank in contact with the water therein. A restrictive baffle is secured inside the gas exhaust flue to retard hot gases rising in the flue from the combustion chamber whereby to increase heat transfer from the hot gases to the water in contact with the exhaust flue. A draft inducing blower is secured in a top end of the exhaust flue above the top wall of the tank. A heat exchanger is in communication with a heat exchange section of the flue above the top end of the exhaust flue to extract further heat from residual hot gases in the exhaust flue. | 01-24-2013 |
20140261239 | Water Heater Having Upstream and Downstream Manifolds - A water heater system comprises a water tank, a burner plenum, a flue, a blower, a combustion air passageway, a dilution air passageway, an upstream manifold, and a downstream manifold. The upstream manifold divides air from the blower so that some air flows through the combustion air passageway to the burner plenum and some air flows through the dilution air passageway to the downstream manifold. The downstream manifold combines the air from the dilution air passageway with combustion products from the flue. | 09-18-2014 |
20140261240 | Water Heater System Having Venturi Draw System - A water heater system comprises a water tank, a burner plenum, a flue, and a dilution air blower system. The dilution air blower system comprises a blower, a dilution air passageway, and a venturi system. Air from the blower is forced through the dilution air passageway and discharged toward the venturi system. When the dilution air blower system is attached to the water heater system, air discharged from the dilution air discharge passage via the blower passes through a converging region, throat region, diverging region and exit passage of the venturi system and draws combustion products through the flue and out the venturi system. | 09-18-2014 |
20140261241 | HEAT EXCHANGER AND BODY THEREFORE, AND A METHOD FOR FORMING A HEAT EXCHANGER BODY - Heat exchanger, comprising a heat exchanger body made of light metal or light metal alloy, wherein the body comprises at least a flue duct and a flame receiving space, wherein the body comprises two parts at opposite sides of the flue duct and flame receiving space, said two parts substantially defining said flue duct and flame receiving space, wherein the flue duct and flame receiving space define a main flow direction for flue gas between an entry side of the flame receiving space and an outlet of the flue duct, wherein each of said parts comprises a first series of ribs extending into the space between said two parts and having a length direction substantially perpendicular to the main flow direction for flue gas, thus defining a meandering flow path of flue gasses between said flame receiving space and said outlet and a second series of ribs extending in said flame receiving space, wherein between the ribs of said second series of opposite parts an open space is provided. | 09-18-2014 |
20140261242 | CORRUGATED INDIRECT WATER HEATER COIL - A corrugated indirect heating coil is disclosed. The heating coil includes an intake and an exhaust. Tubing connects the intake and exhaust together in fluid communication. The tubing includes a plurality of corrugations formed thereon to maximize surface area for heat exchange. The tubing is preferably wound into coils and supported by a frame. | 09-18-2014 |
20140305385 | Conversion of Single-Pass Boiler to Multi-Pass Operation - Modifications convert an existing single-pass boiler to operate with a multi-pass combustion gas flow through the flue passages of the heat exchanger of the boiler. A diverting target wall is arranged partway along the length of the original combustion chamber, and an upper draft diverter is arranged in a flue collector chamber above the flue passages, to divert some or all of the combustion gas into a multi-pass flow pattern through several flue passages of the heat exchanger in series. The modifications may further include changing the nozzle oil delivery rate and cone angle, the oil supply pressure, the draft conditions, and others. Heat extraction from the hot combustion gas to the boiler water is increased, exhaust gas temperature is decreased, and overall efficiency is increased, to result in a fuel and cost savings. | 10-16-2014 |
20150298900 | Catalytic Heating Assembly for an Oil Storage Tank - In an oil storage tank having an interior oil storage chamber and a tank opening in one of the boundary walls, a heating assembly is supported to extend into the interior oil storage chamber from the tank opening. The assembly includes a casing of walls surrounding with a casing mounting flange mountable in sealing engagement relative to a tank mounting flange about the full perimeter of the tank opening such that the casing protrudes into the interior oil storage chamber of the oil storage tank. The heating chamber is suitable sized and configured to operably receive a catalytic heater therein. The heating chamber further accommodates entry of combustion air and combustion fuel into the heating chamber and exhaust of emissions therefrom. | 10-22-2015 |
20160061487 | APPARATUS AND METHOD FOR CLEANING FLUE GAS - A multi-stage exhaust apparatus to reduce the emission of pollutants from a fossil fuel furnace and to achieve greater efficiency in the energy consumption by such furnace. The multi-stage exhaust may include a vacuum chamber boiler, a submerged pump vacuum chamber, a bath scrubber, and a clean air tower. The system may further include a secondary submerged vacuum chamber and a secondary bath scrubber. | 03-03-2016 |
20160091222 | Domestic gas-fired water heater condensing flue system - A domestic gas-fired water heater condensing flue system wherein in one embodiment a blower is secured at the outlet end of the flue pipe to direct the hot flue gases through an external heat exchange flue conduit. The external heat exchange flue conduit has a sealed water channel surrounding a narrow flue gas internal passage. Water from the bottom end of the tank is circulated in the external heat exchange flue conduit and release in the top part of the tank. In a further embodiment, an inverted U-shaped flue pipe is supported vertically in the water tank and the domestic water supply for the tank is disposed in a downward section of the flue pipe to pre-heat the water supply to the tank and cool the flue gases before being released to atmosphere. The water in the tank is heated by the upward and downward sections of the U-shaped flue pie | 03-31-2016 |
20160138827 | Condensing water heater with dielectrically insulated secondary flue - A high efficiency condensing flue gas-fired water heater is provided with a secondary tubular flue mounted inside the water tank and secured thereto by dielectric connectors to electrically isolate the secondary tubular flue from the tank. The secondary tubular flue has an intermediate helical section and opposed connecting end sections which each form a part of the dielectricconnectors. The connectors do not require any welding for its installation to the tank and a compression nut and dielectric insulators provide for a leak proof and electrically isolated connection. The method of securing the secondary tubular flue is also described. | 05-19-2016 |
20160146500 | EXCHANGER FOR HEATING BOILERS - An exchanger for heating boilers is formed of an external prismatic framework, a burner and an exhaust duct, characterized in that it includes a block of tubes formed of a plurality of tube sections positioned against one another horizontally and vertically, separated at equal distances from one another and integrated in a prismatic housing creating between them a closed circuit of water, leaving the tube sections free, forming different levels separated by deflectors in order to control the inflow and outflow of the gases produced by combustion, directing the gases as desired through the different levels, capturing the heat along the path of the gases in order to quickly heat the water in the circuit without losing calories and reducing fuel consumption as much as possible. | 05-26-2016 |
20160161144 | SECTIONAL HEAT EXCHANGER FOR USE IN A HEAT CELL - A sectional heat exchanger for a heat cell. The sectional heat exchanger having two end segments and one or more intermediate segment(s) provided between the two end segments which are assembled in the heat exchanger. A combustion chamber is provided in the sectional heat exchanger, perpendicular to the one or more intermediate segment(s), each of the one or more intermediate segments having at least one flow channel for a fluid to be heated. In between each two consecutive segments at least one flow channel for flue gas is present. The total width of the sectional heat exchanger decreases over at least part of the length in the direction away from the combustion chamber. The depth of the flow channels for flue gas decreases in the direction away from the combustion chamber. The distance between the two walls delimiting the intermediate segment increases in the direction away from the combustion chamber | 06-09-2016 |
20160201944 | HEAT TRANSFER BAFFLE ARRANGEMENT FOR FUEL-BURNING WATER HEATER | 07-14-2016 |
20160377319 | HEAT EXCHANGER - The present invention relates to a heat exchanger comprising: a burner for combusting a mixture of air and fuel; and a heat exchange unit in which heat is exchanged between combustion gas caused by the combustion of the burner and a heating medium, wherein the heat exchange unit includes a plurality of unit plates stacked on each other, and a sensible-heat exchange unit and a latent-heat exchange unit coaxially disposed around the burner are integrally formed with the unit plates. | 12-29-2016 |