KYUNGDONG NAVIEN CO., LTD. Patent applications |
Patent application number | Title | Published |
20160061445 | DUAL VENTURI FOR COMBUSTION DEVICE - A dual venturi for a combustion device that can control the quantities of gas and air supplied to the burner of a water heater and in which a motor is combined with a damper so as to simultaneously open and close the inlets for secondary air and gas and efficiently control the quantity of heat, in order to increase the turn-down ratio. The dual venturi includes: a housing having a discharge part coupled to a turbo fan; an air supply unit divided into first and second air supply units; a gas supply unit divided into first and second gas supply units communicating with the first and second air supply units; and an opening and closing unit that blocks the flow of secondary air and secondary gas when needing a low quantity of heat, and opens both the second air supply unit and the second opening when needing a high quantity of heat. | 03-03-2016 |
20150362214 | COMBUSTION APPARATUS HAVING INTAKE AIR/EXHAUST AIR HEAT EXCHANGER - The present invention relates to a combustion apparatus having an intake air/exhaust air heat exchanger. The combustion apparatus comprises: a burner for generating exhaust gas; a blower for supplying external air to the burner; a main heat exchanger for absorbing heat from the exhaust gas generated by the burner; an exhaust gas duct for discharging the exhaust gas having passed the main heat exchanger to the outside; an intake air duct for introducing external air to the blower; an intake air/exhaust air heat exchanger for exchanging heat between the external air introduced to the blower and the exhaust gas discharged through the exhaust gas duct using a thin film plate disposed therebetween; and an exhaust flue for discharging the exhaust gas having passed the intake air/exhaust air heat exchanger to the outside. | 12-17-2015 |
20150345787 | AIR PROPORTIONAL CONTROL TYPE COMBUSTION DEVICE AND METHOD FOR ADJUSTING HEAT AMOUNT THEREOF - Disclosed are an air proportional control type combustion device and a method for adjusting the heat amount thereof. The combustion device according to the present invention, which controls the output heat amount by controlling the RPM of a blower, is capable of compensating for an air flow rate with respect to external circumstances such as place of installation, blocking of a gas duct, and seasonal changes, or the RPM of the blower caused by such situational changes. In a case where there is a difference between air pressure (Act. APS) measured after the blower is driven at a reference RPM (Ref. RPM) in a state where gas supply is blocked and reference air pressure (Ref. RPM), the combustion device compensates for the difference while causing the RPM to vary and applies the varied RPM as a new reference RPM. | 12-03-2015 |
20150338127 | COMBUSTION APPARATUS HAVING AIR INTAKE PREHEATER - The present invention relates to a combustion apparatus capable of reducing the combustion load of a burner and improving the combustion efficiency thereof. The combustion apparatus includes: a premixing chamber for premixing external air, introduced through an air supply inlet, with a combustion gas; a blower for supplying a mixed air premixed in the premixing chamber toward a burner; a combustion chamber for burning the mixed air by ignition of the burner; a heat exchanger for heat exchange with room heating water by using the combustion heat of the combustion chamber; an exhaust gas discharging part for discharging an exhaust gas having passed through the heat exchanger; and a duct through which the exhaust gas having passed through the exhaust gas discharging part is discharged outside, wherein the combustion apparatus includes an air intake preheater for heat exchange between the exhaust gas discharged to the duct through the exhaust gas discharging part and the air supplied to the premixing chamber through the air supply inlet, the air intake preheater including a channel-forming member in which a plurality of unit plates are stacked with a predetermined interval therebetween to form an exhaust gas channel and an air intake channel therein that are separated from each other, are adjacent to each other, and are alternately arranged. | 11-26-2015 |
20150300661 | HOT WATER-CENTERED COMBINED HOT WATER AND HEATING BOILER - The objective of the present invention is to provide a hot water-centered hot water and heating combination boiler, in which heat exchange for a hot water supply is performed in a main heat exchanger and heat exchange for a heating water supply is performed in an auxiliary heat exchanger so that the hot water supply can be accelerated, energy can be saved, and the temperature of the hot water can be controlled with ease. To achieve the abovementioned objective, the boiler of the present invention includes: a cold water inflow tube through which cold water flows in; a main heat exchanger which heats the cold water flowing in through the cold water inflow tube by using the combustion heat of a burner; a hot water discharge tube which discharges the hot water heated in the main heat exchanger; an auxiliary heat exchanger which supplies heating water during a heating mode, in which heating consumption place, and causes heat exchange to occur between the heated water in the main heat exchanger and the lowered temperature returning water, in which the heating consumption place; and a control part which controls the combustion of the burner during a hot water mode and heating mode. | 10-22-2015 |
20150086931 | COMBUSTION DEVICE FOR IMPROVING TURNDOWN RATIO - The purpose of the present invention is to provide a combustion device for improving a turndown ratio, which is capable of stably implementing a combusted state in a low-output load region by improving a turndown ratio of a burner. To this end, the present invention provides the combustion device having a premixing chamber ( | 03-26-2015 |
20150056564 | DUAL VENTURI FOR COMBUSTION APPARATUS - The present invention relates to a dual venturi for a combustion apparatus, and more particularly, to a dual venturi for a combustion apparatus that is capable of effectively controlling calorific power since the amount of gas for a burner provided in a water heater and the amount of supplied air are controlled in two phases, and a motor and a damper are coupled to each other so that the damper opens or blocks inlets for secondary air and the gas at the same time that the damper is rotated by the driving of the motor. The present invention includes: a housing that is a cylindrical duct where a first passage and a second passage are formed therein partitioned by a partition wall, wherein a first gas inlet pipe is formed in one side portion of the first passage; a damper which is disposed in the second passage of the housing so as to open or block the flow of the secondary air according to the state of rotation, wherein a damper hole is formed in the damper; a secondary gas inlet pipe having one end portion coupled with the damper, wherein a secondary gas outlet is formed on the same circumference as the damper hole, a secondary gas flows into the other end portion, and the secondary gas outlet and the damper hole selectively communicate with each other according to the angle of rotation of the damper; and a motor for rotating in a coupled state with the damper which is disposed outside of the housing. | 02-26-2015 |
20150056563 | DUAL VENTURI FOR COMBUSTOR - The present invention relates to a dual venturi for a combustor and, more specifically, to a dual venturi for a combustor which can control, in two stages, the amount of gas and air supplied to a burner provided in a water heater, wherein a motor and a damper are combined in such a manner that the damper is rotated by the driving of the motor, and thus the damper simultaneously opens or closes the inlet for secondary air and gas, thereby efficiently controlling the quantity of heat. The dual venturi comprises: a housing which has a first gas inlet and a second gas inlet on one side of the upper part thereof, and which has an interior divided by a partition wall such that a first passage and a second passage are formed; and an opening and closing means which is disposed in the housing, has an upper part connected to the second gas inlet such that gas flows therein, and controls the flow of air and gas by closing or opening the second passage as a damper is rotated by a motor provided on the exterior of the housing. | 02-26-2015 |
20150050608 | GAS-AIR MIXING DEVICE FOR COMBUSTOR - Provided is a gas-air mixing device for a combustor which effectively controls the amount of gas and air supplied to a burner provided in a combustor, such as a boiler or a water heater, thus improving the turn-down ratio which leads to increased convenience for using hot water and heat and enhanced durability of the burner. The gas-air mixing device for a combustor comprises: a housing, connected on one side to a turbo fan; a discharge part disposed on one side of the housing and in contact with the turbo fan; first and second air supply parts, provided on the other side of the discharge part and separated by a first partition; first and second gas supply parts, separated by a second partition; and an opening/closing means for controlling the flow of gas and air by opening or blocking the second air supply part and the second gas supply part. | 02-19-2015 |
20140262176 | HOT WATER HEAT EXCHANGER - The present invention is directed to providing a hot water heat exchanger which has a simple piping structure and minimizes a flow passage length therein, thereby minimizing flow resistance. To this end, the hot water heat exchanger is characterized in that the first adaptor and the second adaptor are connected to the partition configured to define one side surface of the heat exchanging part, a first heating water circulation passage through which the heating water introduced from the inlet port of the first adaptor flows is formed at the space between the partition and the partition adjacent thereto, a first direct water circulation passage through which the direct water introduced from the inlet port of the second adaptor flows is formed at the space between the partition configured to define the other side surface of the heat exchanging part and the partition adjacent thereto, and a plurality of second heating water circulation passages through which the heating water passing through the first heating water circulation passage flows, and a plurality of second direct water circulation passages through which the direct water passing through the first direct water circulation passage flows are alternately formed between the first heating water circulation passage and the first direct water circulation passage. | 09-18-2014 |
20130291809 | DOMESTIC COMBINED HEAT AND POWER SYSTEM - The present invention relates to a domestic combined heat and power system, and the domestic combined heat and power system includes a power unit, a heat-storage tank which receives waste heat of the power unit and stores heat in direct water, and a main heat exchanger which is connected to the heat-storage tank and is heated by a burner so as to use the water as hot water or heating water, in which a waste-heat heat exchanger filled with a heat-transfer medium is installed between the power unit and the heat-storage tank such that a waste-heat pipe of the power unit is arranged in the form of a coil at one side inside the waste-heat heat exchanger, and a heat-storage pipe of the heat-storage tank is arranged in the form of a coil at the other side, so that waste heat of the power unit is indirectly heat exchanged to the heat-storage tank through the heat-transfer medium; in which hot-water piping coming out from the heat-storage tank is arranged so as to be indirectly heat exchanged via a hot-water heat exchanger, and heating piping coming out from the heat-storage tank is connected to the heating water-heat exchanger, and a part of the heating piping again comes out and is arranged so as to be indirectly heat exchanged via the hot-water heat exchanger. According to the present invention, since a heat-exchange method for the power unit and the heat-storage tank is changed into an indirect heat-exchange method, costs and waste of energy consumption are reduced, and there is sharing of functions that are duplicated across the heat-storage tank and a boiler such that efficient system design is possible, variability and compatibility are enhanced, and the system volume is reduced such that installation space may be more effectively used. | 11-07-2013 |
20130260325 | GAS BOILER INCLUDING OUTPUT ADJUSTING DEVICE, AND METHOD OF ADJUSTING OUTPUT OF GAS BOILER - A gas boiler and a method of adjusting output of the gas boiler by adjusting mixture ratio of air and gas for combustion in proportion to an output value of the boiler, and continuously changing the mixture regardless of the boiler output. The gas boiler includes a ventilator, a gas valve, a burner, a combustion chamber, a heat exchanger, and an exhaust gas hood. The inlet of the ventilator includes an output adjusting device having an air inlet; an air adjustment valve; a gas outlet; a gas adjustment valve that adjusts the gas passing through the gas outlet; and a valve driving unit that drives the air adjustment valve and the gas adjustment valve. Output of the burner is continuously adjusted by adjusting distance between the air adjustment valve and the gas adjustment valve, and distance between the air inlet and the gas outlet. | 10-03-2013 |
20130199318 | ACTUATOR ASSEMBLY - The present invention relates to an actuator assembly, and provides an actuator assembly comprising: an upper case; a lower case; an actuator interposed between the upper and the lower cases; a cam coupled to the actuator; and a shutter connected to the cam, in which the cam includes protrusions and recesses, which are alternately formed at an interval of 90°, a hook is provided of which one end is disposed so as to alternately come into contact with the protrusions and the recesses according to a rotation of the cam, the other end is coupled to a spring, a longitudinal middle protrudes so as to form a touch part, and a hook shaft is coupled to a portion between the touch part and the other end of the hook, and a single microswitch is further provided at an upper side of the cam in order to stop an operation of the actuator in accordance with contact with the touch part. | 08-08-2013 |
20130125838 | LATENT HEAT EXCHANGER IN CONDENSING BOILER - A latent heat exchanger of a condensing boiler, in which the condensing boiler includes a sensible heat exchanger absorbing combustion sensible heat generated by a burner, a latent heat exchanger absorbing latent heat of water vapor contained in a combustion product heat-exchanged by the sensible heat exchanger, an exhaust hood discharging the combustion product flowing through the latent heat exchanger, and a condensed water outlet discharging condensed water generated from the latent heat exchanger. In the latent heat exchanger the combustion product burnt by the burner flows through the sensible heat exchanger, is vertically raised toward the latent heat exchanger, is slantingly lowered in an outward direction at an acute angle from a horizontal plane, is heat-exchanged by the latent heat exchanger, is vertically raised, and is discharged to the exhaust hood. | 05-23-2013 |
20130062043 | HEAT EXCHANGER - A heat exchanger applied to a boiler that can improve heat transfer efficiency by reducing the distance between the heat exchange pipes while making a long heating water passage through heat exchange pipes, which can be easily manufactured. Additionally, the heat exchanger includes a heat exchange device, first and second subsidiary plates, and first and second end plates. The heat exchange device includes a plurality of heat exchange pipe units through which heating water passes and which are spaced apart from each other at regular intervals. The heat exchange pipe units are provided between a heating water inlet and a heating water outlet, and are formed of pipes having a rectangular cross-section of which a side coming in contact with the combustion gas has a width large than the height. | 03-14-2013 |
20130059258 | BOARD-PLANK PREMIXING BURNER PORT ARRANGEMENT - A board-plank premixing burner port arrangement which increases durability by preventing a large force from being applied to a burner-fixing structure despite accumulated thermal expansion caused by red heat on a burner surface. A burner body unit includes partially cut and stacked plates. The plates form a gas mixture passage and a burner port, are disposed such that cut parts of the neighboring plates intersect one another. The board-plank premixing burner port arrangement has increased combustion efficiency by reducing burner port deformation, and is easily manufactured at a low cost through a simplified installation structure of the burner port. | 03-07-2013 |
20120305105 | HOT-WATER SUPPLY HEAT EXCHANGER PROVIDED WITH A MIXING VALVE, AND ADAPTOR HAVING A BUILT-IN MIXING VALVE - A hot-water supply heat exchanger having a mixing valve and a mixing valve integrated adopter are provided to facilitate control of hot water temperature with a simplified pipe structure. A hot-water supply heat exchanger comprises a heat exchange part ( | 12-06-2012 |
20120244483 | FLAME HOLE UNIT STRUCTURE OF A GAS BURNER - A gas burner for simplifying assembling and manufacturing of a burner flame hole unit by overlapping plates. Portions of the plates are cut so that the cut portions communicate with each other. Flame holes and mixture channels for a mixture of gas and air pass through a gap between the cut portions. The cut portions overlap and communicate with each other between adjacent plates, thereby forming flame holes and channels for flow of the mixture of gas and air through gaps between the cut portions. | 09-27-2012 |
20120227681 | PIPE CONNECTING STRUCTURE OF WATER HEATER - A pipe connecting structure of a water heater. Individual parts in the water heater are integrally coupled with a pipe body, which is injection-molded, provides paths of tap water and hot water, reduces the number of pipes connecting the individual parts, and simplifies the connection structure of the pipes. The pipe connecting structure of the water heater includes a tap water inlet pipe connected from a tap water inlet to a heat exchanger; a hot water supply pipe connected from the heat exchanger to a hot water outlet; a flow sensor for measuring the flow rate of the tap water introduced via the tap water inlet; and a flow control valve for controlling the flow rate of the hot water discharged via the hot water outlet. The pipe body connects and is integral with the tap water inlet, the tap water inlet pipe, the hot water supply pipe, and the hot water outlet. | 09-13-2012 |
20120225393 | GAS BURNER - The present invention relates to a gas burner in which a burner body and a side plate are assembled together without a welding process, to thereby simplify manufacturing procedures and reduce manufacturing costs. To accomplish this, the gas burner of the present invention includes a plurality of burner units ( | 09-06-2012 |
20120178033 | LEAN-RICH BURNER - A lean-rich burner is provided, in which an air-rich flame and a fuel-rich flame are formed by a simple structure, thereby reducing the emission of noxious gas and enabling stable combustion. The lean-rich burner includes: a main flame part ( | 07-12-2012 |
20110114300 | HEAT EXCHANGER OF UPWARD COMBUSTION TYPE CONDENSING BOILER - A heat exchanger of an upward combustion condensing boiler maximizes latent-heat recovery efficiency by causing the flow direction of exhaust gas to coincide with the flow direction of condensed water in a latent heat exchange unit. The heat exchanger includes a sensible heat exchange unit that absorbs sensible heat generated from an upward combustion burner; a latent heat exchange unit that absorbs latent heat of vapor included in exhaust gas which has been heat-exchanged in the sensible heat exchange unit; and a condensed-water tray that discharges condensed water generated from the latent heat exchange unit. An upward flow of exhaust gas passed through the sensible heat exchange unit is converted into a downward flow that passes through the latent heat exchange unit, and the latent heat exchange unit is installed so that the flow direction of the exhaust gas passing through the latent heat exchange unit vertically coincides with the falling direction of condensed water generated by the latent heat exchange unit. | 05-19-2011 |
20110053105 | BUNSEN BURNER USING LEAN-RICH COMBUSTION TYPE - A Bunsen burner which reduces pollutant materials generated during combustion by adopting a lean combustion, enhancing combustion stability. The Bunsen burner includes burner bodies, each including: a venturi plate having a venturi hole through which a gas mixture is introduced, wherein air supplied from a fan is mixed with fuel jetted from a nozzle unit, a guide plate for guiding the gas mixture upward, an inclined portion having first flame holes for jetting the gas mixture at an oblique angle with respect to the vertical direction, a side portion that extends downward from a lower side of the inclined portion and includes through-holes through which some of the gas mixture passes, and a connection plate having opposed ends connected to the side portions of the burner bodies, respectively, and having second flame holes in which the gas mixture passing through the through-holes and secondary air, introduced by the fan and supplied along outer surfaces of the burner bodies, are mixed so that lean combustion occurs. | 03-03-2011 |
20110017152 | BOILER FOR SUPPLYING HEATING WATER AND HOT WATER SIMULTANEOUSLY - A boiler capable of simultaneously performing a heating operation and a hot water operation and readily controlling the temperature of the hot water. In the boiler primary heating water is heated by a burner in a main heat exchanger and is supplied to a place in need of heating to be used as heating water. Secondary heating water exchanges heat with the primary heating water in an instant heat exchanger and is supplied to a place in need of hot water to be used as hot water. The boiler includes a flow regulator so that the primary heating water is supplied to the place in need of heating after flowing through the flow regulator which regulates flow depending on heating load, and is subsequently supplied to the instant heat exchanger after regulation by the flow regulator depending on hot water load. | 01-27-2011 |
20110000444 | GAS BOILER HAVING CLOSED-TYPE CISTERN TANK - A gas boiler having a closed cistern tank with no diaphragm, in which the volume of the cistern tank can be reduced, the closed cistern tank storing returned heating water and absorbing pressure changes of the heating water. The cistern tank having no diaphragm has an internal space that is isolated from the atmosphere, and includes a heating water inlet through which the heating water is introduced, a heating water outlet through which the heating water is discharged toward a circulation pump, a water level detecting sensor which detects the water level of the heating water stored in the cistern tank, and a safety valve for maintaining the pressure of an internal space of the cistern tank to less than a predetermined value. | 01-06-2011 |
20100212604 | HOT WATER SUPPLYING SYSTEM - The present invention relates to a hot water supplying system that includes a preheating-circulating system, which heats water to maximally reduce the time to attain a temperature set by a user, and is designed to use a portion of preheating energy for heating, preventing pipelines from being frozen to burst in winter by preheating-circulating. In order to achieve the object, the invention provides a hot water supplying system that includes: a water tank for storing water flowing into an inlet; a heat exchanger for heating the water flowed therein; a controller that compares a temperature measured by a temperature sensor disposed at a predetermined position in a pipeline through which water flows, with a set preheating temperature, and controls the operation of the heat exchanger; and a pump that is disposed in a pipeline connecting a first node, which is disposed in a pipeline connecting the heat exchanger with an outlet, with a second node, which is disposed in a pipeline connecting the inlet with the water tank. According to a hot water supplying system of the invention, a water tank storing a predetermined amount of water is provided in the hot water supplying system, such that it is possible to supply hot water heated by a set temperature in the shortest time when a user wants to use the hot water, by preheating water stored in the water tank and remaining in the pipelines even when the hot water is not being used, and to prevent the pipelines from freezing and bursting during the winter. | 08-26-2010 |
20100047728 | COMBUSTION APPARATUS FOR A GAS BOILER - Disclosed is a combustion apparatus of a gas boiler. The combustion apparatus of the gas boiler includes a structure that can improve a TDR of a burner, and can increase an efficiency of a gas boiler by preventing oxygen concentration of exhaust gas from being rapidly increased in a low output area The combustion apparatus includes: an air blower for supplying air required for combustion; a proportion control valve for controlling a supply flow rate of gas; a nozzle part connected to the proportion control valve, the nozzle part supplying gas according to opening and closing of auxiliary valves and including a plurality of nozzles connected in parallel with one another; a mixing chamber for mixing the air supplied from the air blower and the gas passed through the nozzle part, and then supplying the mixed air and gas to a bumer surface; and a controller for controlling the number of rotations of the air blower according to opening and closing of the proportion control valve and the auxiliary valves, so as to supply only an amount of air as much as that required for combustion. | 02-25-2010 |
20090283057 | Hot-Water Supplying System of Boiler Equipped With Dual Pipe Heat Exchanger - Disclosed is a hot water supplying system of a boiler equipped with a double pipe heat exchanger, which can normally perform a heating operation in the boiler having the double pipe heat exchanger, in which an outer pipe used for a hot water pathway and an inner pipe used for a heating water pathway are installed, under a circumstance where water supply is stopped. The hot water supplying system includes: a double pipe heat exchanger including an outer pipe to which combustion heat is directly transferred from a burner of a combustion chamber; a cold water pipe for supplying water to the outer pipe of the heat exchanger; and a hot water supplying pipe through which water is discharged from the outer pipe of the heat exchanger, wherein a backflow cutoff valve and a pressure absorbing device are mounted on the cold water pipe. The hot water supplying system is provided with the backflow cutoff valve and the pressure absorbing device, thereby normally performing an operation of heating rooms under a circumstance where water supply is interrupted. | 11-19-2009 |
20090133861 | Heat Exchanger of Condensing Boiler for Heating and Hot-Water Supply - Disclosed is a heat exchanger for a condensing boiler supplying both heating water and hot water, which can use a double pipe as a sensible heat exchanger, instead of the use of an indirect heat exchanger. The heat exchanger includes: a sensible heat exchanger; and a latent heat exchanger made by connecting a plurality of unit heat exchangers to define exhaust gas pathway, each unit heat exchanger being manufactured in such a manner that three plates having a convexo-concave shape are stacked on one another to define a heating water pathway and a hot water pathway to be adjacent to each other in order to increase a heat transfer area. | 05-28-2009 |
20080277097 | Hot-Water Supply System Having Dual Pipe - Disclosed is a hot water supplying apparatus which has a dual pipe capable of transferring heat energy of hot water, which is heated by heat of combustion of a burner and flows in pipe of a heat exchanger, to an inner pipe in which cold water is introduced, thereby inhibiting the condensation of moisture so as to prevent the corrosion of parts in the hot water supplying apparatus. The hot water supplying apparatus, comprises: a burner for supplying heat; a water inlet pipe for supplying cold water; a heat exchanging pipe formed with a dual pipe including an outer pipe for directly receiving combustion heat of the burner, and an inner pipe formed in the outer pipe, for allowing the cold water, which is introduced through the water inlet pipe, to be heated while passing through the inner pipe; and a water outlet pipe for discharging the heated water from the heat exchanging pipe. | 11-13-2008 |
20080276884 | Hot-Water Supply System Having Supplementary Heat Exchanger - Disclosed is a hot water supplying apparatus having an auxiliary heat exchanger. The hot water supplying apparatus comprises: a heat exchanger including an inlet pipe for introducing heating water into the heat exchanger, and first, second, and third heat exchanging pipes connected to the inlet pipe and sequentially arranged; and an auxiliary heat exchanging device installed at an inlet port of the heat exchanger through which the heating water is introduced, the auxiliary heat exchanging device including a first auxiliary heat exchanging pipe connecting the inlet pipe to the first heat exchanging pipe, a second auxiliary heat exchanging pipe connecting the second heat exchanging pipe to the third heat exchanging pipe, and heat transfer fins for transferring heat energy from the second auxiliary heat exchanging pipe to the first auxiliary heat exchanging pipe. | 11-13-2008 |