gas water heaters

Abstract

The present invention provides a gas water heater, comprising: a combustion chamber; a water tank disposed within the combustion chamber; and a first heat exchanger comprising a flue gas pipeline and a water inlet pipeline capable of heat exchange, the water inlet pipeline having a water inlet and a water outlet, the flue gas pipeline having a flue gas inlet and a flue gas outlet, the flue gas inlet communicating with the combustion chamber, and the water outlet connected to the water inlet; the water inlet being adapted to receive a water source, and the flue gas outlet being adapted to exhaust smoke. By arranging the first heat exchanger in the direction of flue gas exhaust, the heat of the flue gas can fully heat the water. Thus, after heat exchange with the flue gas, the water is preheated to a temperature higher than ambient temperature. The water tank only needs to heat the preheated water to a user-set temperature, thereby reducing the time required for heating.

Description

Technical Field

[0001] The present invention relates to the technical field of water heaters, and in particular to a gas water heater. Background Art

[0002] Gas water heaters have become an indispensable household appliance in our lives. During daily use, although the flames discharged by gas water heaters are cooled by fans, the exhaust temperature is still relatively high. At the same time, most of the heat in this part is discharged, and the heat after the gas combustion cannot be fully utilized, resulting in a certain amount of waste. In addition, the heat around the combustion chamber is still easy to dissipate and the heat cannot be fully utilized. Summary of the Invention

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the technical defect in the prior art that the heat after gas is consumed cannot be fully utilized, thereby providing a gas water heater that can fully utilize the waste heat.

[0004] In order to solve the above technical problems, the present invention provides a gas water heater, comprising: a combustion chamber; a water tank, arranged in the combustion chamber; a first heat exchanger, comprising a flue gas pipeline and a water inlet pipeline capable of heat exchange, the water inlet pipeline having a water inlet and a water outlet, the flue gas pipeline having a flue gas inlet and a flue gas outlet, the flue gas inlet being connected to the combustion chamber, and the water outlet being connected to the water inlet; wherein the water inlet is suitable for connecting to a water source, and the flue gas outlet is suitable for exhausting smoke.

[0005] Optionally, the gas water heater further comprises: a second heat exchanger, which is arranged around the water tank, and the second heat exchanger has a water inlet and a water outlet, the water inlet is connected to the water outlet, and the water outlet is connected to the water tank.

[0006] Optionally, the second heat exchanger includes a plurality of interconnected hot water exchange pipes, the extension direction of the hot water exchange pipes is the exhaust direction of the flue gas, and the water inlet and the water outlet are respectively arranged on the hot water exchange pipes.

[0007] Optionally, the gas water heater further comprises: a smoke gathering structure provided in the combustion chamber, wherein the smoke gathering structure is suitable for gathering the smoke in the combustion chamber in the exhaust direction of the smoke.

[0008] Optionally, the smoke gathering structure includes: an enclosure; a conical cover connected to the enclosure; a smoke guide port provided on the conical cover, and the smoke guide port connected to the smoke inlet.

[0009] Optionally, the first heat exchanger is a shell-and-tube heat exchanger, the tube side of the shell-and-tube heat exchanger is the flue gas pipeline, and the shell side of the shell-and-tube heat exchanger is the water inlet pipeline.

[0010] Optionally, the gas water heater further includes: an exhaust fan connected to the flue gas outlet of the first heat exchanger.

[0011] Optionally, the gas water heater also includes: a first temperature detection device, provided at the flue gas outlet, the first temperature detection device being suitable for detecting the temperature of the flue gas outlet and sending a first temperature signal; a controller, communicatively connected to the first temperature detection device, the controller being suitable for obtaining the first temperature signal sent by the first temperature detection device, and issuing an alarm signal when the first temperature signal shows that the temperature exceeds a first preset temperature; an alarm module, communicatively connected to the controller, the alarm module being suitable for obtaining the alarm signal issued by the controller, and issuing an alarm according to the alarm signal.

[0012] Optionally, the gas water heater further comprises: a gas distribution pipe; and a plurality of flamethrowers, each of which is provided on the gas distribution pipe.

[0013] Optionally, the gas water heater also includes: a flow valve, arranged at the air inlet of the gas distribution pipe; a second temperature detection device, suitable for detecting the water outlet temperature of the water tank and sending a second temperature signal; a controller, communicatively connected to the second temperature detection device, the controller being suitable for obtaining the second temperature signal sent by the second temperature detection device, and controlling the air intake of the flow valve according to the second temperature signal.

[0014] The technical solution of the present invention has the following advantages:

[0015] The atomization method of the gas water heater provided by the present invention is to arrange the first heat exchanger and the second heat exchanger in sequence in the exhaust direction of the flue gas. Therefore, the flow direction of water entering the water tank is opposite to the flow direction of the flue gas, so that the heat of the flue gas can fully heat the water. In this way, after heat exchange with the flue gas and heat exchange with the first heat exchanger in the combustion chamber, the water is completely preheated to a water temperature higher than normal temperature. The water tank only needs to heat the preheated water to the temperature set by the user, which greatly reduces the time required for heating. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0017] Figure 1 A schematic bottom view of the structure of a gas water heater provided in one embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the explosion structure of a gas water heater provided in one embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the main structure of a gas water heater provided in one embodiment of the present invention;

[0020] Figure 4 A schematic top view of a gas water heater according to an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the three-dimensional structure of a gas water heater provided in one embodiment of the present invention;

[0022] Figure 6 A schematic diagram of the explosion structure in the combustion chamber of a gas water heater provided in one embodiment of the present invention;

[0023] Figure 7 A schematic diagram of the three-dimensional structure of a gas distribution pipe of a gas water heater provided in one embodiment of the present invention;

[0024] Figure 8 A schematic diagram of the three-dimensional structure of a burner of a gas water heater provided in one embodiment of the present invention;

[0025] Figure 9 A schematic cross-sectional view of a burner of a gas water heater provided in one embodiment of the present invention;

[0026] Figure 10 A schematic top view of the burner of a gas water heater provided in one embodiment of the present invention;

[0027] Figure 11 A schematic diagram of the explosion structure of the second heat exchanger of a gas water heater provided in one embodiment of the present invention;

[0028] Figure 12 A schematic diagram of an exploded structure of the internal structure of a second heat exchanger of a gas water heater provided in one embodiment of the present invention;

[0029] Figure 13 A schematic diagram of the heat exchange process of a second heat exchanger of a gas water heater provided in one embodiment of the present invention;

[0030] Figure 14 A schematic diagram of the working process of a gas water heater provided in one embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1-shell; 2-water tank; 3-first water heater; 4-second water heater;

[0033] 5-gas distribution pipe; 6-smoke gathering structure; 7-exhaust fan; 8-first connecting pipe;

[0034] 9-second connecting pipe; 10-flow valve; 11-alarm module;

[0035] 101-combustion chamber;

[0036] 21-hot water outlet; 22-tank; 23-sealing plate 23;

[0037] 301-water inlet; 302-water outlet; 303-smoke inlet; 304-smoke outlet;

[0038] 31 - cylinder; 32 - first end plate; 33 - second end plate; 34 - heat exchange tube group; 35 - baffle; 36 - first end cap; 37 - second end cap;

[0039] 401-water outlet;

[0040] 51-flamethrower;

[0041] 511- vent;

[0042] 61-enclosure; 62-conical cover; 63-smoke outlet. DETAILED DESCRIPTION

[0043] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0044] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0045] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0046] In addition, the technical features involved in the different embodiments of the present invention described below are

[0047] There is no conflict between them and they can be combined.

[0048] Example 1

[0049] like Figure 1 and Figure 3 As shown, a gas water heater comprises: a combustion chamber 101, a water tank 2,

[0050] A heat exchanger 3 and a water tank 2 are disposed within the combustion chamber 101. The first heat exchanger 3 includes a flue gas pipeline and a water inlet pipeline for heat exchange. The flue gas pipeline has a flue gas inlet 303 and a flue gas outlet 304, while the water inlet pipeline has a water inlet 301 and a water outlet 302. The flue gas inlet 303 communicates with the combustion chamber 101, while the water outlet 302 is connected to the water inlet of the water tank. The water inlet is suitable for receiving a water source, while the flue gas outlet 304 is suitable for exhausting smoke.

[0051] The water inlet 301 of the first heat exchanger 3 can be fed with tap water, while the flue gas inlet 303 of the first heat exchanger 3 can be fed with flue gas from the combustion chamber 101. Therefore, the water undergoes initial heating within the first heat exchanger 3, becoming warm water at the water outlet 302, which then enters the water tank 2. The water tank 2 is heated by the combustion of gas within the combustion chamber 101. After heat exchange with the flue gas, the water is preheated to a temperature higher than ambient temperature. The water tank 2 only needs to heat the preheated water to the user-set temperature, significantly reducing the heating time.

[0052] In the exhaust direction of the flue gas, the second heat exchanger 4 and the first heat exchanger 3 are arranged in sequence. Therefore, the flow direction of the water entering the water tank 2 is opposite to the flow direction of the flue gas, so that the heat of the flue gas can fully heat the water. In this way, after heat exchange with the flue gas and heat exchange with the second heat exchanger 4 in the combustion chamber 101, the water is completely preheated and reaches a water temperature higher than normal temperature. The water tank 2 only needs to heat the preheated water to the temperature set by the user, which greatly reduces the time required for heating.

[0053] Furthermore, the gas water heater also includes: a second heat exchanger 4, which is arranged around the water tank 2, and has a water inlet and a water outlet, the water inlet is connected to the water outlet 302, and the water outlet is connected to the water tank 2.

[0054] The above-mentioned second heat exchanger 4 is connected to the water outlet 302 through the water inlet, so that the water preheated by the first heat exchanger 3 enters the second heat exchanger 4. The second heat exchanger 4 is arranged around the water tank 2, so that the heat of the water tank 2 after heating and the heat in the combustion chamber 101 can be heat exchanged with the second heat exchanger 4. Therefore, when water flows into the second heat exchanger 4, the water can be heated again, thereby achieving the purpose of fully utilizing the excess heat in the combustion chamber 101.

[0055] In the exhaust direction of the flue gas, the second heat exchanger 4 and the first heat exchanger 3 are arranged in sequence. Therefore, the flow direction of the water entering the water tank 2 is opposite to the flow direction of the flue gas, so that the heat of the flue gas can fully heat the water. In this way, after heat exchange with the flue gas and heat exchange with the second heat exchanger 4 in the combustion chamber 101, the water is completely preheated and reaches a water temperature higher than normal temperature. The water tank 2 only needs to heat the preheated water to the temperature set by the user, further reducing the time required for heating.

[0056] Furthermore, the second heat exchanger 4 includes a plurality of interconnected hot water exchange pipes, the extension direction of the hot water exchange pipes is the exhaust direction of the flue gas, and the water inlet and the water outlet are respectively arranged on the hot water exchange pipes.

[0057] The above-mentioned multiple hot water exchange pipes are folded up and down to enclose a space, and the water tank 2 is placed in the space enclosed by the second heat exchanger 4, so that the water entering the hot water exchange pipe through the water inlet can be fully heat-exchanged and then enter the water tank 2 through the water outlet, thereby achieving the purpose of fully utilizing the waste heat.

[0058] The water tank 2 includes a hot water outlet 21 , a tank body 22 , and a sealing plate 23 .

[0059] Furthermore, the gas water heater further comprises: a smoke gathering structure 6, which is provided in the combustion chamber 101, and the smoke gathering structure 6 is suitable for gathering the smoke in the combustion chamber 101 in the exhaust direction of the smoke.

[0060] A portion of the heat emitted by the combustion chamber 101 diffuses to the surrounding area. The flue gas that diffuses to the surrounding area is absorbed by the second heat exchanger 4. The remaining portion, collected by the flue gas gathering structure 6, enters the flue gas pipeline of the first heat exchanger 3. The horizontal projection of the flue gas gathering structure 6 can cover the horizontal projection of the first heat exchanger 3, allowing the flue gas gathering structure 6 to gather the flue gas as much as possible.

[0061] Furthermore, the smoke gathering structure 6 includes: an enclosure 61 , a conical cover 62 and a smoke guide port 63 . The conical cover 62 is connected to the enclosure 61 . The smoke guide port 63 is provided on the conical cover 62 . The smoke guide port 63 is connected to the smoke inlet 303 .

[0062] The above-mentioned enclosure 61 includes four side panels connected in sequence, and the four side panels enclose a cavity. The conical cover 62 is connected to the upper end of the enclosure 61, which can form a gathering effect on the smoke so as to facilitate the smoke to be discharged through the smoke guide port 63 and enter the smoke inlet 303.

[0063] Furthermore, the first heat exchanger 3 is a shell-and-tube heat exchanger, the tube side of the shell-and-tube heat exchanger is a flue gas pipeline, and the shell side of the shell-and-tube heat exchanger is a water inlet pipeline.

[0064] The above-mentioned first heat exchanger 3 mainly includes a cylinder 31, a first head 36, a second head 37, a first end plate 32, a second end plate 33, a baffle 35 and a heat exchange tube group 34. The first head 36 and the second head 37 are respectively arranged at the opposite ends of the cylinder 31, the flue gas outlet 304 is arranged at the first head 36, the flue gas inlet 303 is arranged at the second head 37, and the water inlet 301 and the water outlet 302 are respectively arranged on the cylinder 31. Therefore, the shell side of the first heat exchanger 3 forms a water inlet pipeline, and the tube side of the first heat exchanger 3 forms a flue gas pipeline. Gas combustion will produce CO2 and H2O, and carbon deposits will appear after long-term use. Compared with the outer wall of the heat exchange tube, the inner wall of the heat exchange tube can be cleaned by poking with a brush to clean the carbon deposits, which can be cleaned directly. The outer wall of the heat exchange tube belongs to the shell side and cannot be cleaned directly. If scale appears, it needs to be cleaned with the help of some descaling agents, or a magnesium rod can be set for descaling. Taking the above factors into consideration, the relatively clean medium, water, goes through the shell side, and the unclean medium, flue gas, goes through the tube side.

[0065] Water enters the cylinder 31 from the shell-side water inlet 301, filling the entire cylinder 31. The outer wall of the heat exchange tube is fully in contact with the water. The cylinder 31 is provided with a baffle 35 inside. The cylinder 31 is a circular cylinder 31. Therefore, the baffle 35 is a circular plate with a cutout portion, and there are many holes in the middle for passing the heat exchange tube. The outer diameter of the baffle 35 is equivalent to the inner diameter of the cylinder 31. Multiple baffles 35 are placed upside down and down in sequence to facilitate deflection. After the water is deflected by the baffle 35, the time it stays in the cylinder 31 is increased. Finally, the water flows out from the water outlet 302 of the tube side and flows into the second heat exchanger 4 through the second connecting pipe 9. The two fluids do not come into direct contact, preventing harmful gases from the combustion process from dissolving into the water.

[0066] The first heat exchanger 3 described above uses cold water for the shell side and flue gas for the tube side. Due to the presence of the tube bundle, the flue gas entering the heat exchanger is dispersed into many heat exchange tubes, greatly increasing the heat exchange area and further improving the heat exchange efficiency. The outer side of the heat exchange tube belongs to the shell side. After the water flows into the first heat exchanger 3, the turbulence of the water is further increased under the deflection effect of the baffle 35, and the distance the water flows becomes longer, which greatly improves the heat exchange efficiency of the heat exchanger. The flue gas in the tube side and the cold water in the shell side exchange heat, and the water is preheated to a certain extent. The first heat exchanger 3 adopts a shell-and-tube heat exchanger, which has the advantage of high heat exchange efficiency. The unique baffle 35 structure enables the cold water to fully cool the flue gas while achieving the purpose of heating the water, thus achieving the reuse of waste heat. The water flowing out of the first heat exchanger 3 will pass through the second heat exchanger 4 to exchange heat with the heat around the combustion chamber 101, and finally flow into the water tank 2 for thorough heating. After the first heat exchanger 3 and the second heat exchanger 4, the water is completely preheated to a temperature higher than normal temperature. The water tank 2 only needs to heat the preheated water to the temperature set by the user, which greatly reduces the time required for heating.

[0067] The gas water heater further comprises an exhaust fan 7 , which is connected to the flue gas outlet 304 of the first heat exchanger 3 .

[0068] In order to ensure that the smoke can be discharged quickly, an exhaust fan 7 is provided. The exhaust fan 7 has an air inlet and an air outlet. The air inlet can be connected to the smoke outlet 304 through a first connecting pipe 8, and the air outlet is used to discharge the smoke.

[0069] The gas water heater also includes: a first temperature detection device, a controller and an alarm module 11. The first temperature detection device is arranged at the flue gas outlet 304. The first temperature detection device is suitable for detecting the temperature of the flue gas outlet 304 and sending a first temperature signal. The controller is communicatively connected with the first temperature detection device. The controller is suitable for obtaining the first temperature signal sent by the first temperature detection device, and when the first temperature signal shows that it exceeds the first preset temperature, an alarm signal is issued; the alarm module 11 is communicatively connected with the controller. The alarm module 11 is suitable for obtaining the alarm signal issued by the controller and issuing an alarm according to the alarm signal.

[0070] The gas water heater is provided with a first temperature sensor, which stops heating and sends an alarm signal to the user when the exhaust temperature reaches a dangerous temperature, thereby ensuring the safety of the gas water heater during use.

[0071] The gas water heater further comprises: a gas distribution pipe 5 and a plurality of flamethrowers 51 , and the plurality of flamethrowers 51 are respectively arranged on the gas distribution pipe 5 .

[0072] A plurality of flamethrowers 51 are provided on the above-mentioned gas distribution pipe 5, and an air outlet 511 is provided on the side wall of the flamethrower 51, which is used to combine with oxygen in the air to generate flames. The gas distribution pipe 5 and the flamethrower 51 are arranged below the water tank 2, and are used to directly heat the water tank 2. Among them, the gas distribution pipe 5 is located in the combustion chamber 101. The high-temperature flames ejected by the multiple injectors directly heat the bottom of the water tank 2. The flames ejected are higher in temperature than the flames produced by natural combustion, and the heating effect is also more obvious. The flamethrower 51 is designed based on the Bernoulli principle, can produce a higher flame, and the heating efficiency is greatly improved, thereby improving the efficiency of the gas water heater.

[0073] The gas water heater also includes: a flow valve 10, a second temperature detection device and a controller. The flow valve 10 is arranged at the air inlet of the gas distribution pipe 5. The second temperature detection device is suitable for detecting the outlet water temperature of the water tank 2 and sending a second temperature signal. The controller is communicatively connected with the second temperature detection device. The controller is suitable for obtaining the second temperature signal sent by the second temperature detection device and controlling the air intake of the flow valve 10 according to the second temperature signal.

[0074] When the temperature is reached, the gas will be cut off or the flame will be reduced to maintain the temperature set by the user.

[0075] The gas water heater further comprises: a shell 1 forming a combustion chamber 101. The first heat exchanger 3 is arranged in the shell 1, making the overall structure more compact and saving space.

[0076] In the above-mentioned gas water heater, the flow direction of water is opposite to that of flue gas, which greatly increases the flue gas heat exchange efficiency and has a more obvious cooling effect on the entire combustion environment; the flame is sprayed out by a nozzle, which is quieter than traditional water heaters and greatly improves the water boiling speed. Tap water flows from top to bottom and is preheated after passing through the heat exchanger. After water of a certain temperature enters the water tank, the heating time of the water is greatly shortened, making full use of the waste heat. The gas water heater is also provided with a specific negative feedback control system to improve the heat absorption efficiency.

[0077] Those skilled in the art will appreciate that all or part of the processes in the above-described method embodiments can be implemented by instructing related hardware through a computer program. The program can be stored in a computer-readable storage medium, and when executed, the program can include the processes in the above-described method embodiments. The storage medium can be a magnetic disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory, a hard disk drive (HDD), or a solid-state drive (SSD). The storage medium can also include a combination of the above-mentioned types of memory.

[0078] Obviously, the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will readily appreciate that other variations or modifications based on the above descriptions are possible. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A gas water heater, characterized in that: include: a combustion chamber (101) adapted for combustion to produce flue gas; A water tank (2) is provided in the combustion chamber (101); A first heat exchanger (3) comprises a flue gas pipeline and a water inlet pipeline capable of performing heat exchange, the water inlet pipeline having a water inlet (301) and a water outlet (302), the flue gas pipeline having a flue gas inlet (303) and a flue gas outlet (304), the flue gas inlet (303) being in communication with the combustion chamber (101), and the water outlet (302) being in communication with the water tank (2); The water inlet (301) is suitable for connecting to a water source, and the smoke outlet (304) is suitable for exhausting smoke; The gas water heater further comprises: A smoke gathering structure (6) is provided in the combustion chamber (101); the projection of the smoke gathering structure (6) on a horizontal plane can cover the projection of the first heat exchanger (3) on a horizontal plane; the smoke gathering structure (6) is suitable for gathering the smoke from the combustion chamber (101) in the direction of smoke discharge; the smoke gathering structure (6) comprises: enclosure (61); A conical cover (62) connected to the enclosure (61); A smoke guide port (63) is provided on the conical cover (62), and the smoke guide port (63) is connected to the smoke inlet (303); The gas water heater further comprises: an exhaust fan (7) connected to the flue gas outlet (304) of the first heat exchanger (3).

2. The gas water heater according to claim 1, characterized in that: Also includes: The second heat exchanger (4) is arranged around the water tank (2), and the second heat exchanger (4) has a water inlet and a water outlet, the water inlet is connected to the water outlet (302), and the water outlet is connected to the water tank (2).

3. The gas water heater according to claim 2, characterized in that: The second heat exchanger (4) comprises a plurality of interconnected heat exchange pipes, the extension direction of the heat exchange pipes being the exhaust direction of the flue gas, and the water inlet and the water outlet being respectively arranged on the heat exchange pipes.

4. The gas water heater according to any one of claims 1 to 3, characterized in that: The first heat exchanger (3) is a shell-and-tube heat exchanger, the tube side of the shell-and-tube heat exchanger is the flue gas pipeline, and the shell side of the shell-and-tube heat exchanger is the water inlet pipeline.

5. The gas water heater according to any one of claims 1 to 3, characterized in that: Also includes: a first temperature detection device, provided at the smoke outlet (304), the first temperature detection device being suitable for detecting the temperature of the smoke outlet (304) and sending a first temperature signal; a controller, communicatively connected to the first temperature detection device, the controller being adapted to obtain the first temperature signal sent by the first temperature detection device and to issue an alarm signal when the first temperature signal indicates that the temperature exceeds a first preset temperature; An alarm module is communicatively connected to the controller, and is adapted to obtain the alarm signal sent by the controller and send out an alarm according to the alarm signal.

6. The gas water heater according to any one of claims 1 to 3, characterized in that: Also includes: Gas distribution tube (5); A plurality of flamethrowers (51) are respectively arranged on the gas distribution pipes (5).

7. The gas water heater according to claim 6, characterized in that: Also includes: A flow valve (10) is provided at the air inlet of the air distribution pipe (5); A second temperature detection device, adapted to detect the outlet water temperature of the water tank (2) and send a second temperature signal; A controller is communicatively connected to the second temperature detection device, and the controller is suitable for obtaining the second temperature signal sent by the second temperature detection device and controlling the air intake of the flow valve (10) according to the second temperature signal.

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