WO2018058928A1

WO2018058928A1 - Gas water heater

Info

Publication number: WO2018058928A1
Application number: PCT/CN2017/079172
Authority: WO
Inventors: 寿利萍; 梁国荣; 梁泽锋; 薛承志
Original assignee: 芜湖美的厨卫电器制造有限公司
Priority date: 2016-09-30
Filing date: 2017-03-31
Publication date: 2018-04-05

Abstract

A gas water heater (A), comprising: a housing (200) in which an accommodating chamber (21), a water inlet port (22) and a water outlet port (23) are defined; a catalytic burner (100) provided in the accommodating chamber (21) and having a fan port (11a) and a gas port (11b) that are in communication with a premixing chamber, a preheating section being integrated on a catalyst (12) in the catalytic burner (100); a fan (300) in communication with the fan port (11a); a gas ratio valve (400) having an outlet in communication with the gas port (11b); and a heat exchanger (500) connected to the burner (100).

Description

Gas water heater

Technical field

The invention relates to the technical field of water heaters, and more particularly to a gas water heater.

Background technique

The main combustion mode adopted by the burner is flaming combustion, that is, the gas and air are not pre-mixed in the combustion device, but the gas and air are respectively sent into the combustion chamber, and the mixture is burned while being mixed, and the flame is generated by combustion. It is long and has a sharp outline. Due to the high activation energy of flaming combustion, the burning speed is slow and the combustion is incomplete, resulting in a decrease in thermal efficiency. In addition, the amount of gas radiation of the flame combustion flame is small, and the main heat transfer mode is convection heat transfer, which easily reduces the energy utilization rate.

Furthermore, due to the difference in contact between the different parts of the combustion and the air, it is easy to cause the completeness of the combustion and the temperature. In the high temperature zone, due to the higher temperature, it is easy to cause the formation of NOx pollutants; in the low temperature zone, due to the combustion Incomplete, it is easy to produce harmful substances such as carbon monoxide, hydrocarbons and tar.

Summary of the invention

The present invention aims to solve at least one of the technical problems in the related art to some extent.

To this end, the present invention provides a gas water heater, which has a simple structure, safe use, energy saving and environmental protection, and a good user experience.

A gas water heater according to an embodiment of the present invention includes: a housing defining a receiving chamber therein, the housing having a water inlet port and a water outlet interface; a catalytic burner, wherein the catalytic burner is disposed in the receiving chamber a catalytic premixing chamber is defined in the catalytic burner, the catalytic combustor has a fan interface and a gas interface that are electrically connected to the premixing chamber, and the catalytic combustor is provided with a catalytic converter, the catalytic converter Constructed to continue combustion when the temperature exceeds a predetermined temperature and there is a supply of gas and air and a preheating section is integrated on the catalyst; a fan that is in communication with the fan to conduct air to the premixing chamber a gas proportional valve, the outlet of the gas proportional valve is electrically connected to the gas interface to deliver gas to the premixing chamber; a heat exchanger, the heat exchanger being disposed in the housing and with the burner Connected to absorb heat generated by combustion of the burner, the heat exchanger having a water inlet and a water outlet, the water inlet is electrically connected to the water inlet, and the water outlet is electrically connected to the water outlet.

The gas water heater according to the embodiment of the invention has the advantages of simple and compact structure, reliable connection of various components, small volume, catalytic combustion of gas and air in the catalytic burner, and less content of carbon monoxide and nitrogen oxides in the flue gas after combustion. It is energy-saving and environmentally friendly, safe to use, and the combustion of gas and air is moderated, which is beneficial to reduce the working noise of gas water heaters. The gas water heater has a simple and compact structure, reliable connection of various components, convenient assembly and disassembly, low working noise, safe use, and section Environmentally friendly, user experience is good.

In addition, the gas water heater according to the embodiment of the present invention may further have the following additional technical features:

According to an embodiment of the present invention, a catalytic combustor includes: a combustor casing, the pre-mixing cavity is defined in the combustor casing, the combustor casing has the fan interface and a gas interface; a plurality of the distribution members are disposed in the premixing chamber spaced apart in the airflow direction, and each of the distribution members is provided with a plurality of distribution holes that are electrically connected to the premixing chamber; The gas separation rod is detachably disposed in the premixing chamber and defines a gas passage therein, the gas separation rod has a gas inlet and a gas outlet that are electrically connected to the gas passage, and the gas inlet and the gas The proportional valve is in communication, and the gas outlet is electrically connected to the premixing chamber.

According to an embodiment of the present invention, the gas separation rod defines a gas passage extending along a length thereof, the gas outlet includes a plurality of the gas outlets spaced apart along a length direction of the gas separation rod Arrangement.

According to an embodiment of the invention, the plurality of gas outlets are evenly and spaced apart along the length of the gas separation rod, the opening of each of the gas outlets facing the distribution member.

According to an embodiment of the invention, the gas separation rod forms a ring shape extending in a circumferential direction of the burner frame.

According to an embodiment of the invention, the fan interface is located directly below the gas separation rod and the orthographic projection of the fan interface in the plane of the gas separation rod is located in the annular region of the gas separation rod.

According to an embodiment of the present invention, the cross-sectional shape of the burner frame is formed into a rectangle, and the gas separation bar includes two oppositely disposed transverse bars and two oppositely disposed longitudinal bars, the transverse bars and the Longitudinal rod arc transition.

According to an embodiment of the invention, each of the distribution members forms a rectangular distribution network corresponding to the shape of the burner casing.

According to an embodiment of the present invention, the fan interface and the gas interface are respectively disposed at a bottom wall of the burner frame, and the gas separation rod is disposed inside a bottom wall of the burner frame On the surface.

According to an embodiment of the invention, the dispensing member forms a distribution network of uniform shape, a plurality of said distribution nets being spaced apart in an up and down direction and each of said distribution nets being connected to an inner side wall of said burner frame.

According to an embodiment of the present invention, the burner frame has an air outlet that is electrically connected to the premixing chamber, the catalyst is disposed at the air outlet, and the burner housing is adjacent to the outlet The position of the port is provided with an ignition needle or an induction needle.

According to an embodiment of the invention, the heat exchanger is arranged above the catalytic burner.

The additional aspects and advantages of the invention will be set forth in part in the description which follows.

DRAWINGS

1 is a schematic structural view of a gas water heater according to an embodiment of the present invention;

2 is a partial view of a gas water heater according to an embodiment of the present invention;

3 is a schematic view showing the internal structure of a burner at a viewing angle according to an embodiment of the present invention;

4 is a schematic view showing the internal structure of a burner at another viewing angle according to an embodiment of the present invention;

Figure 5 is an overall perspective view of a burner in accordance with an embodiment of the present invention;

Figure 6 is a front elevational view of a burner in accordance with an embodiment of the present invention;

Figure 7 is a side view of a burner in accordance with an embodiment of the present invention;

Figure 8 is a perspective view of a gas separation rod of a burner in accordance with an embodiment of the present invention.

Reference mark:

A: gas water heater;

100: catalytic burner;

11: burner frame; 11a: fan interface; 11b: gas interface;

12: catalytic converter;

13: gas separation rod; 13a: gas inlet; 13b: gas outlet;

14: distribution member; 141: first distribution member; 142: second distribution member; 143: third distribution member;

200: housing; 21: receiving chamber; 22: water inlet interface; 23: water outlet interface;

300: fan;

400: gas proportional valve;

500: heat exchanger;

600: smoke collecting hood; 61: exhaust vent.

detailed description

Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are intended to be illustrative of the invention and are not to be construed as limiting.

A gas water heater A according to an embodiment of the present invention will be specifically described below with reference to FIGS. 1 through 8.

As shown in FIGS. 1 and 2, the gas water heater A includes a casing 200, a catalytic burner 100, a fan 300, a gas proportional valve 400, and a heat exchanger 500.

Specifically, the housing 200 defines a receiving chamber 21 having a water inlet port 22 and a water outlet port 23. The catalytic burner 100 is disposed in the receiving chamber 21, and the catalytic burner 100 defines a premixing chamber for catalysis. The combustor 100 has a fan interface 11a and a gas port 11b that are electrically connected to the premixing chamber. The catalytic combustor 100 is provided with a catalyst 12 configured to continuously burn when the temperature exceeds a predetermined temperature and gas and air are supplied. And a preheating section (not shown) is integrated on the catalyst 12.

Further, the fan 300 is electrically connected to the fan interface 11a to deliver air to the premixing chamber, and the outlet of the gas proportional valve 400 The gas port 11b is electrically connected to deliver gas to the premixing chamber. The heat exchanger 500 is disposed above the catalytic combustor 100 and connected to the catalytic combustor 100 to absorb heat generated by the combustion of the catalytic combustor 100. The heat exchanger 500 has a heat. The water inlet and the water outlet, the water inlet and the water inlet port 22 are electrically connected, and the water outlet and the water outlet interface 23 are electrically connected.

Specifically, as shown in FIG. 1, the gas water heater A is mainly composed of a casing 200, a catalytic burner 100, a fan 300, a gas proportional valve 400, and a heat exchanger 500. Wherein, the housing 200 extends in a vertical direction (up and down direction as shown in FIG. 1), and the housing 200 defines a receiving cavity 21 extending along the length thereof. The bottom of the housing 200 is provided with a water inlet port 22 and a water outlet. The bottom portion of the accommodating chamber 21 is provided with a fan 300. The catalytic burner 100 is disposed above the fan 300. The fan interface 11a of the catalyzed burner 100 communicates with the outlet of the fan 300. The gas proportional valve 400 is disposed at one of the fan 300. The side is connected to the gas interface 11b, and the heat exchanger 500 is disposed above the catalytic burner 100 and connected to the catalytic burner 100. The heat exchanger 500 has a water inlet and a water outlet interface 23 that are electrically connected to the water inlet port 22. Pass the water outlet.

The fan 300 provides air, and the gas proportional valve 400 provides gas, and the air directly enters the premixing chamber. At the same time, the gas is uniformly supplied through the gas proportional valve 400, and uniformly mixed with the air in the premixing chamber, and then reaches the catalytic of the catalytic combustor 100. On the device 12, after the ignition of the ignition needle, the combustion is performed, and the high-temperature flue gas generated by the combustion exchanges heat with the heat exchanger 500, thereby heating the water in the heat exchanger 500, ensuring that the hot water flowing out of the gas water heater A is subjected to heat exchange. After the collected flue gas is collected by the collecting hood 600, it is discharged to the outside through the exhaust vent 61.

The catalyst 12 includes a substrate and a catalyst coated on the substrate. The catalyst 12 is integrated with a preheating section. After the gas and air are thoroughly mixed in the premixing chamber, the preheating section on the catalyst 12 is first passed. Under the action of the preheating section, the temperature of the catalyst is gradually increased, so that the catalyst reaches a preset temperature (lighting temperature), so that the catalyst fully exerts the catalytic effect and realizes the catalytic combustion of the gas.

Since the catalytic combustion flame is low or even flameless, the preheating section is integrated on the catalyst 12 compared with the gas water heater of the related art, the volume of the catalytic burner 100 can be reduced, and the combustion chamber height of the gas water heater A can be made. It can be lowered, thereby reducing the height of the whole machine, making the gas water heater A smaller and achieving the purpose of lightening the gas water heater A.

Furthermore, it is also ensured that the catalyst can reach the light-off temperature, so that the catalyst can exert catalytic effect and realize catalytic combustion of the gas. Compared with the flaming combustion method in the related art, the catalytic burner 100 adopts catalytic combustion mode, not only It can achieve low emission of carbon monoxide and nitrogen oxides, and has higher safety, and can reduce combustion noise, save energy and protect the environment, and have a good user experience.

Therefore, the gas water heater A according to the embodiment of the present invention has a simple and compact structure, reliable connection of various components, small volume, catalytic combustion of gas and air in the catalytic combustor 100, and oxidation of carbon monoxide and nitrogen in the flue gas after combustion. The content of the material is small, energy saving and environmental protection, safe use, and the combustion of the gas and air mixture is moderated, which is beneficial to reducing the working noise of the gas water heater A. The gas water heater A has a simple and compact structure, reliable connection of various components, convenient assembly and disassembly, low working noise, safe use, energy saving and environmental protection, and good user experience.

It should be noted here that due to the low catalytic combustion flame or even flameless combustion, the gas water heater in the related art In comparison, the combustion chamber height of the gas water heater A can be lowered, thereby reducing the height of the whole machine, and making the gas water heater A smaller.

Here, as shown in FIGS. 3 and 4, according to an embodiment of the present invention, the catalytic combustor 100 includes a combustor casing 11, a plurality of distribution members 14, and a distracting rod 13.

Specifically, a premixing chamber is defined in the combustor casing 11, and the combustor casing 11 has a fan interface 11a and a gas interface 11b that are electrically connected to the premixing chamber, and the plurality of distributing members 14 are spaced apart in the airflow direction. In the mixing chamber, each distribution member 14 is provided with a plurality of distribution holes (not shown) that are electrically connected to the premixing chamber, and the gas separation rod 13 is detachably disposed in the premixing chamber and defines a gas passage therein. The gas rod 13 has a gas inlet 13a and a gas outlet 13b that are in communication with the gas passage, and the gas inlet 11b is in communication with the gas proportional valve 400, and the gas outlet 13b is electrically connected to the premixing chamber.

In other words, the catalytic combustor 100 is mainly composed of a combustor casing 11, a plurality of distributing members 14 and a gas dividing rod 13, a premixing chamber is defined in the combustor casing 11, and a fan interface 11a is arranged on the combustor casing 11. And the gas interface 11b, a plurality of distribution members 14 are disposed in the premixing chamber, and the plurality of distribution members 14 are evenly spaced along the flow direction of the airflow, and each of the distribution members 14 is respectively arranged with a plurality of distribution holes, a plurality of distribution holes The gas separation rod 13 is detachably disposed in the premixing chamber and located under the plurality of distribution members 14. The gas separation channel 13 defines a gas passage, the gas passage and the gas separation rod 13 respectively. The upper gas inlet 13a and the gas outlet 13b are turned on, and the gas enters the gas passage of the gas separation rod 13 from the gas inlet 13a, and is discharged into the premixing chamber through the gas outlet 13b on the gas separation rod 13.

Specifically, a fan is connected to the fan interface 11a on the burner frame 11, and a gas pipe is connected at the gas interface 11b. The air enters the premixing chamber under the action of the fan 300, and at the same time, the gas passes through the gas inlet 13a through the gas pipe. It enters the gas passage defined by the gas separation rod 13 and is discharged into the premixing chamber through the plurality of gas outlets 13b, mixed with the air, and passes through a plurality of distribution holes which are filled on the plurality of distribution members 14, and the air and the gas are uniformly mixed.

Thus, the catalytic burner 100 eliminates the fire row structure of the related art by arranging a plurality of distribution members 14 in the premixing chamber of the burner casing 11, and detachably providing the points in the premixing chamber. The gas rod 13 enables the gas outlet 13b on the gas separation rod 13 to be electrically connected to the premixing chamber, so that the gas-air mixture entering the various regions of the catalytic burner 100 can be evenly distributed, thereby achieving complete combustion of the gas and reducing Waste of fuel reduces pollutants such as nitrogen oxides and emissions of harmful substances such as carbon monoxide, hydrocarbons and tar. Furthermore, the mixed gas of gas and air does not need to be supplemented with secondary air during combustion, thereby saving the space of the premixing chamber, thereby reducing the occupied space of the catalytic burner 100. The structure of the catalytic burner 100 is simple, processing and manufacturing cost. Low, high space utilization, high combustion efficiency and good user experience.

Alternatively, according to an embodiment of the present invention, the gas passage extends along the length direction of the gas separation rod 13, the gas outlet 13b includes a plurality, and the plurality of gas outlets 13b are spaced apart along the length direction of the gas separation rod 13. Thus, the gas enters the gas passage through the gas inlet 13a of the gas separation rod 13 and then flows along the length of the gas passage. During the flow, the gas in the gas passage is discharged to the pre-gas through the gas outlet 13b on the gas separation rod 13. The mixing chamber is thoroughly mixed with air to ensure the combustion effect of the gas in the catalytic burner 100.

For example, the gas separation rod 13 may have a substantially rectangular ring shape, and the gas separation rod 13 defines a gas passage therein, and the gas passage along the gas passage The gas distribution rod 13 extends in the longitudinal direction of the ring, and a plurality of gas outlets 13b are arranged on the gas separation rod 13, and a plurality of gas outlets 13b are evenly spaced on the upper surface of the gas separation rod 13, and the gas enters the gas from the gas inlet 13a. In the channel, it is discharged through a plurality of gas outlets 13b to ensure uniform gas supply, which provides a prerequisite for uniform mixing of air and gas.

Preferably, the plurality of gas outlets 13b are uniformly and spaced apart along the length direction of the gas separation rod 13, and the opening of each gas outlet 13b faces the distribution member 14.

That is to say, the plurality of distribution members 14 are respectively filled with a plurality of distribution holes in the longitudinal direction, and the plurality of distribution holes are evenly spaced apart on each of the distribution members 14, and correspondingly, the plurality of distribution bars 13 are provided with a plurality of distribution holes The gas outlets 13b are spaced apart and evenly arranged along their length, and the opening of each gas outlet 13b faces the distribution member 14.

Referring to Figures 3 and 4, a pre-mixing chamber is provided with a gas separation rod 13 and three distribution members 14, respectively a first distribution member 141, a second distribution member 142 and a third distribution member 143, wherein the first distribution member 141. The second distribution member 142 and the third distribution member 143 are spaced apart in the up and down direction, that is, the second distribution member 142 is located between the first distribution member 141 and the third distribution member 143, and the first distribution member 141 is located at the second position. Above the sub-assembly 142, the third distribution member 143 is located below the second distribution member 142, and the distracting rod 13 is disposed on the inner surface of the bottom wall of the burner housing 11 and below the third distribution member 143, a plurality of The gas outlet 13b is provided on the top wall of the gas separation rod 13 such that the opening of the gas outlet 13b faces the third distribution member 143.

Optionally, the distribution holes on the plurality of distribution members 14 gradually increase from above and below in the air flow direction, that is, the distribution holes on the first distribution member 141 located above are smaller in diameter than the second distribution members 142 and The diameter of the distribution hole on the three distribution member 143, the diameter of the distribution hole on the lower third distribution member 143 is larger than the diameter of the distribution hole on the second distribution member 142, that is, a plurality of bottom-up arrangements in the pre-mixing chamber The sub-assembly 14, the distribution hole diameter of the distribution member 14 disposed above is smaller than the distribution hole diameter of the distribution member 14 disposed below, thus ensuring uniform and complete mixing of air and gas.

In some embodiments of the invention, the gas separation rod 13 forms an annular shape extending in the circumferential direction of the burner casing 11. Specifically, as shown in FIG. 3 and FIG. 5, the gas separation rod 13 is disposed in the premixing chamber and below the distribution member 14, and the gas separation rod 13 has an annular distribution extending along the circumferential direction of the burner casing 11, when When the gas is discharged from the plurality of gas outlets 13b on the gas separation rod 13, it is evenly distributed around the bottom of the premixing chamber, which is favorable for thorough mixing with the air.

Preferably, the fan interface 11a is located directly below the gas separation rod 13 and the orthographic projection of the fan interface 11a in the plane of the gas separation rod 13 is located in the annular region of the gas separation rod 13.

3 and 4, the fan interface 11a is provided on the bottom wall of the combustor casing 11, and the distracting rod 13 is disposed on the inner surface of the bottom wall of the combustor casing 11 and is located at the fan interface 11a and the distribution member 14. Between the fan interface 11a is located directly below the gas separation rod 13, and the fan interface 11a is located in the annular region defined by the gas separation rod 13, that is, the fan interface 11a is disposed just in the middle of the annular region of the gas separation rod 13, through the fan interface 11a The incoming air diffuses from the middle to the periphery and is then initially mixed with the gas exiting through the plurality of gas outlets 13b, providing an advantage for further thorough mixing through the plurality of distribution members 14. In the present embodiment, the cross-sectional shape of the combustor casing 11 is formed into a rectangular shape, and the distracting rod 13 includes two oppositely disposed transverse rods and two oppositely disposed longitudinal rods, the transverse rods and the longitudinal rods arcuately transitioning.

Optionally, the combustor frame 11 has a rectangular cross section, and the distracting rod 13 is composed of two oppositely disposed transverse rods (not shown) and two oppositely disposed longitudinal rods (not shown), the transverse rods The length is greater than the length of the longitudinal rod, and the arc is transitioned at the joint of the transverse rod and the longitudinal rod, and the appearance is beautiful and the structure is simple.

Specifically, as shown in FIGS. 3 to 6 , the cross section of the combustor casing 11 has a rectangular shape, and the distracting rod 13 has a rectangular ring shape corresponding to the shape of the combustor casing 11 .

As shown in FIG. 8, the gas separation rod 13 is mainly composed of two oppositely disposed transverse rods and two oppositely disposed longitudinal rods. The length of the transverse rod is greater than the length of the longitudinal rod, and the joint between the transverse rod and the longitudinal rod is an arc. In the transition, the gas separation rod 13 defines an annular gas passage extending along the circumferential direction thereof, and the gas separation rod 13 is arranged with a plurality of gas outlets 13b, and the plurality of gas outlets 13b are evenly and spacedly arranged on the upper surface of the gas separation rod 13 The gas enters the gas passage from the gas inlet 13a and is discharged through the plurality of gas outlets 13b to ensure uniform gas supply, providing preconditions for uniform mixing of air and gas.

Therefore, the structure of the gas separation rod 13 is simple, the appearance is beautiful, and the gas separation rod 13 is formed into a rectangular ring shape corresponding to the shape of the burner frame 11, and the gas can be transported to various regions in the premixing chamber to ensure gas. Fully and evenly mixed with air to improve the combustion efficiency of the fuel.

Advantageously, each distribution member 14 forms a rectangular distribution network corresponding to the shape of the burner frame 11.

Referring to Figures 3 and 4, the cross section of the combustor casing 11 is substantially rectangular, and correspondingly, the plurality of distribution members 14 distributed in the premixing chamber form a distribution corresponding to the cross section of the combustor casing 11. The net, the plurality of distribution nets are kept parallel to the bottom wall surface of the burner frame 11, further ensuring that the air and the gas can be uniformly mixed.

In some embodiments of the present invention, the fan port 11a and the gas port 11b are respectively spaced apart from the bottom wall of the combustor casing 11, and the distracting rod 13 is disposed on the inner surface of the bottom wall of the combustor casing 11.

As shown in FIG. 3, a fan interface 11a and a gas interface 11b are disposed on the bottom wall of the burner frame 11, and the fan interface 11a and the gas interface 11b are spaced apart on the bottom wall, and the fan interface 11a and the fan pipe (not shown) The air is connected by the fan pipe through the fan interface 11a into the premixing chamber, the gas port 11b is connected to the gas pipe, the gas is passed from the gas pipe through the gas port 11b into the gas dividing rod 13, and the gas dividing rod 13 is detachably arranged On the inner surface of the bottom wall of the burner casing 11, when the inspection is required, the gas separation rod 13 can be detached from the bottom wall of the burner casing 11.

Preferably, the distribution member 14 forms a distribution network of uniform shape, the plurality of distribution nets being spaced apart in the up and down direction and each distribution net being connected to the inner side wall of the burner frame 11.

In other words, the shapes of the plurality of distribution members 14 are kept consistent, that is, the plurality of distribution members 14 respectively form rectangular distribution nets of equal size, and the plurality of distribution nets are arranged in the premixing chamber and are arranged at intervals in the up and down direction, and the outer circumferences of the plurality of distribution nets The inner wall of the burner frame 11 is fixedly connected to each other. For example, each of the distribution net and the inner wall of the burner frame 11 can be fixed by welding, screwing, or slotting, and the size of the distribution net can be adjusted according to actual conditions. The distance, the number of rows, and the like, the plurality of distribution nets are respectively parallel to the bottom wall surface of the catalytic burner 100, which is advantageous for better uniform mixing of air and gas.

Air and gas enter the premixing chamber separately for mixing, and then the gas and air mixture is sequentially distributed through multiple layers. The net, after being distributed through the distribution network, makes the mixing of the gas and air of the catalytic burner 100 more uniform, and the uniform mixed gas after passing through the multi-layer distribution net reaches the ignition end of the catalytic burner 100 for combustion.

Therefore, the catalytic combustor 100 of the gas water heater A of the embodiment of the present invention cancels the fire row structure in the related art, and adopts a plurality of distribution net structures and the annular gas splitting rod 13 to ensure uniform mixing of gas and air in each region. The pre-mixing of air and gas is realized, and the secondary air supply is not required, which can simplify the structure of the catalytic combustor 100, thereby reducing the volume of the catalytic combustor 100, realizing the weight reduction of the catalytic combustor 100, and improving the catalysis. The combustion efficiency of the gas in the combustor 100 reduces the emission of toxic gases.

Advantageously, the burner frame 11 has an air outlet that is electrically connected to the premixing chamber, and the catalyst 12 is disposed at the air outlet and an ignition needle or an induction needle (not shown) is disposed adjacent to the air outlet of the burner casing 11. .

Specifically, the catalyst 12 is disposed at an air outlet of the combustor casing 11, and the catalyst 12 is connected to an inner wall surface of the combustor casing 11, for example, the catalyst 12 may form a structure corresponding to the shape of the air outlet, and then The card is connected to the inner wall surface of the burner frame 11 to ensure a fixed connection between the catalyst 12 and the burner frame 11. The catalyst 12 can form a mesh-like or honeycomb structure, and the ignition needle or the induction needle can sense the catalyst 12 Whether the temperature exceeds the predetermined temperature, when the catalytic burner 100 is in operation, the air and the gas enter the premixing chamber through the fan interface 11a and the gas interface 11b, respectively, to be thoroughly mixed, and then pass through the catalyst 12 at the air outlet and preheat. Under the action of the catalyst 12, the combustion combustion of the gas and the air provides certain conditions for the combustion of the catalyst 12, thereby reducing the emission of carbon monoxide and nitrogen oxides. Furthermore, the combustion noise of the catalytic combustion is low and the safety is higher. .

Optionally, the heat exchanger is disposed above the catalytic combustor 100, and the high temperature flue gas generated by the catalytic combustion of the catalytic combustor 100 exchanges heat with the heat exchanger located above the catalytic combustor 100, and the cold water in the heat exchanger absorbs heat. It becomes hot water, and the hot water flows out from the water outlet for the user to use, which reduces the waste of energy and has high heat utilization rate.

The working process of the gas water heater A of the embodiment of the present invention will be specifically described below with reference to Figs.

Specifically, as shown in FIG. 1, the gas water heater A is mainly composed of a casing 200, a catalytic burner 100, a fan 300, a gas proportional valve 400, and a heat exchanger 500.

Wherein, the housing 200 extends in a vertical direction (up and down direction as shown in FIG. 1), and the housing 200 defines a receiving cavity 21 extending along the length thereof. The bottom of the housing 200 is provided with a water inlet port 22 and a water outlet. The bottom portion of the accommodating chamber 21 is provided with a fan 300. The catalytic burner 100 is disposed above the fan 300. The fan interface 11a of the catalyzed burner 100 communicates with the outlet of the fan 300. The gas proportional valve 400 is disposed at one of the fan 300. The side is connected to the gas interface 11b, and the heat exchanger 500 is disposed above the catalytic burner 100 and connected to the catalytic burner 100. The heat exchanger 500 has a water inlet and a water outlet interface 23 that are electrically connected to the water inlet port 22. Pass the water outlet.

The fan 300 provides air, the gas proportional valve 400 provides gas, the fan port 11a on the combustor casing 11 is connected to the fan 300, the gas proportional valve 400 is connected to the gas port 11b through the gas pipe, and the air is entered by the fan 300 through the fan port 11a. In the mixing chamber, at the same time, the gas is entered by the gas pipe through the gas inlet 13a into the combustion defined by the gas separation rod 13 In the gas passage, it is discharged into the premixing chamber through a plurality of gas outlets 13b, mixed with air, and passed through a plurality of distribution holes which are filled on the plurality of distribution members 14, and the air and the gas are uniformly mixed to reach the catalysis of the catalytic burner 100. On the device 12, after the ignition of the ignition needle, the combustion is performed, and the high-temperature flue gas generated by the combustion exchanges heat with the heat exchanger 500, thereby heating the water in the heat exchanger 500, ensuring that the hot water flowing out of the water heater is after the heat exchange. The smoke is collected by the collecting hood 600 and discharged to the outside through the exhaust vent 61.

Wherein, the combustion process of the mixture of gas and air on the catalyst 12 is: first, flaming combustion is performed after ignition, and the catalyst 12 is preheated, and the flow rate of the gas and the air is changed after the temperature of the catalyst 12 reaches a predetermined temperature. Switch the combustion mode to catalytic combustion.

Therefore, the gas water heater A has a simple and compact structure, reliable connection of various components, small volume, catalytic combustion of gas and air in the catalytic burner 100, and low content of carbon monoxide and nitrogen oxides in the flue gas after combustion. It is energy-saving and environmentally friendly, safe to use, and the combustion of gas and air is moderated, which is beneficial to reduce the working noise of gas water heater A. The gas water heater A has a simple and compact structure, reliable connection of various components, convenient assembly and disassembly, low working noise, safe use, energy saving and environmental protection, and good user experience.

Other configurations and operations of gas water heater A in accordance with embodiments of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", " After, "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inside", "Outside", "Clockwise", "Counterclockwise", "Axial", The orientation or positional relationship of the "radial", "circumferential" and the like is based on the orientation or positional relationship shown in the drawings, and is merely for convenience of description of the present invention and simplified description, and does not indicate or imply the indicated device or component. It must be constructed and operated in a particular orientation, and is not to be construed as limiting the invention.

Moreover, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, features defining "first" or "second" may include at least one of the features, either explicitly or implicitly. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless specifically defined otherwise.

In the present invention, the terms "installation", "connected", "connected", "fixed" and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless explicitly stated and defined otherwise. Or in one piece; it may be a mechanical connection, or it may be an electrical connection or a communication with each other; it may be directly connected or indirectly connected through an intermediate medium, and may be an internal connection of two elements or an interaction relationship between two elements. Unless otherwise expressly defined. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood on a case-by-case basis.

In the description of the present specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" and the like means a specific feature described in connection with the embodiment or example. A structure, material or feature is included in at least one embodiment or example of the invention. In this specification, the schematic representation of the above terms does not necessarily require a needle The same is true for the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. In addition, various embodiments or examples described in the specification, as well as features of various embodiments or examples, may be combined and combined.

Although the embodiments of the present invention have been shown and described, it is understood that the above-described embodiments are illustrative and are not to be construed as limiting the scope of the invention. The embodiments are subject to variations, modifications, substitutions and variations.

Claims

A gas water heater characterized by comprising:

a housing defining a receiving cavity therein, the housing having a water inlet interface and a water outlet interface;

a catalytic burner, the catalytic burner is disposed in the accommodating chamber, wherein the catalytic burner defines a premixing chamber, and the catalytic burner has a fan interface and a gas interface that are electrically connected to the premixing chamber, a catalytic converter is disposed in the catalytic burner, the catalytic converter is configured to continuously burn when the temperature exceeds a predetermined temperature and there is gas and air supply, and the preheating section is integrated on the catalytic converter;

a fan, the fan is in communication with the fan port to deliver air to the premixing chamber;

a gas proportional valve, the outlet of the gas proportional valve is electrically connected to the gas interface to deliver gas to the premixing chamber;

a heat exchanger, the heat exchanger being disposed in the casing and connected to the burner to absorb heat generated by combustion of the burner, the heat exchanger having a water inlet and a water outlet, the water inlet and the water inlet The water inlet port is electrically connected, and the water outlet is electrically connected to the water outlet.
The gas water heater of claim 1 wherein the catalytic burner comprises:

a burner frame, the pre-mixing cavity is defined in the burner frame, the burner frame has the fan interface and a gas interface;

a plurality of distribution members, a plurality of the distribution members are disposed in the premixing chamber spaced apart in the airflow direction, and each of the distribution members is provided with a plurality of distribution holes that are electrically connected to the premixing chamber;

a gas separation rod, the gas separation rod is detachably disposed in the premixing chamber and defines a gas passage therein, the gas separation rod has a gas inlet and a gas outlet that are electrically connected to the gas passage, the gas The inlet is in communication with the gas proportional valve, and the gas outlet is electrically connected to the premixing chamber.
A gas water heater according to claim 2, wherein said gas separation rod defines a gas passage extending along a length thereof, said gas outlet includes a plurality of said plurality of said gas outlets along said portion The length of the gas rod is spaced apart.
A gas water heater according to claim 3, wherein a plurality of said gas outlets are uniformly and spaced apart along a length direction of said gas separation rod, and an opening of each of said gas outlets faces said distribution member.
A gas water heater according to claim 2, wherein said gas separation rod forms an annular shape extending in a circumferential direction of said burner casing.
The gas water heater according to claim 5, wherein the fan interface is located directly below the gas separation rod and an orthographic projection of the fan interface in a plane of the gas separation rod is located in the gas separation Inside the annular area of the rod.
The gas water heater according to claim 5, wherein a cross-sectional shape of the burner frame is formed in a rectangular shape, and the gas separation rod includes two oppositely disposed transverse bars and two oppositely disposed longitudinal bars. The transverse rod and The longitudinal rod arc transitions.
A gas water heater according to claim 7, wherein each of said distribution members forms a rectangular distribution net corresponding to the shape of said burner casing.
The gas water heater according to claim 2, wherein said fan interface and said gas port are respectively spaced apart from a bottom wall of said combustor casing, and said distracting rod is disposed at said burner On the inner surface of the bottom wall of the frame.
A gas water heater according to claim 9, wherein said distribution member forms a distribution network of uniform shape, a plurality of said distribution nets are spaced apart in the up and down direction and each of said distribution nets and said burner The inner side walls of the frame are connected.
A gas water heater according to claim 2, wherein said burner casing has an air outlet that is electrically connected to said premixing chamber, said catalyst is provided at said air outlet and said burner An ignition needle or an induction needle is disposed at a position of the frame adjacent to the air outlet.
A gas water heater according to any one of claims 1 to 11, wherein the heat exchanger is disposed above the catalytic burner.