A water heater

Abstract

The utility model discloses a water heater, comprising, shell, be provided with installation cavity in the shell, thermostatic assembly, thermostatic assembly sets up in the installation cavity, and thermostatic assembly includes hot water storehouse and cold water storehouse, and hot water storehouse sets up in the cold water storehouse, to make the water in the cold water storehouse and the water in the hot water storehouse produce heat exchange, and hot water storehouse is provided with hot water inlet pipe and hot water outlet pipe, and the both sides of cold water storehouse are provided with cold water inlet pipe and cold water outlet pipe, heat exchanger, heat exchanger sets up in the installation cavity, and heat exchanger is provided with first water inlet end and first water outlet end, and first water outlet end with hot water inlet pipe conduction, and first water inlet end with cold water outlet pipe conduction, heater, heater sets up in the installation cavity, and heater exchanges heat with heat exchanger, the utility model discloses thermostatic assembly including cold water storehouse and hot water storehouse, hot water storehouse is located in the cold water storehouse, and the cold water and hot water in thermostatic assembly produce heat exchange after user's water stop, and the cooling efficiency is higher, and the water stop temperature rise effect is good.

Description

Technical Field

[0001] This utility model relates to the field of hot water equipment technology, and in particular to a water heater. Background Technology

[0002] Water heaters are common household appliances, suitable for homes, factories, restaurants, and other places. Water heaters can be divided into gas water heaters and electric water heaters. Gas water heaters typically consist of an outer casing and components such as a heat exchanger, burner, and thermostatic chamber housed within it. These components work together to directly heat the water, providing instantaneous heating, which makes gas water heaters popular in homes.

[0003] Current gas water heaters typically have a single-compartment thermostatic chamber structure without an active heat exchange cooling design. They can only cool down through air heat radiation, resulting in low cooling efficiency. When the water supply is interrupted, the residual heat from other components causes the water temperature to continue to rise. When the water is turned on again, hot water flows out, indicating poor temperature rise during water outages. Utility Model Content

[0004] In order to overcome at least one of the defects of the prior art, the present invention provides a water heater in which the thermostatic component includes a cold water chamber and a hot water chamber, the hot water chamber being located inside the cold water chamber. After the user stops the water supply, the cold water and hot water in the thermostatic component exchange heat, resulting in high cooling efficiency and good temperature rise effect after water supply is interrupted.

[0005] The technical solution adopted by this utility model to solve its problem is: A water heater, comprising, The outer casing has a mounting cavity inside it; A thermostatic component is disposed within the mounting cavity. The thermostatic component includes a hot water chamber and a cold water chamber. The hot water chamber is disposed within the cold water chamber to allow heat exchange between the water in the cold water chamber and the water in the hot water chamber. The hot water chamber is provided with a hot water inlet pipe and a hot water outlet pipe, both of which pass through the cold water chamber. Cold water inlet pipes and cold water outlet pipes are provided on both sides of the cold water chamber. The hot water outlet pipe and the cold water inlet pipe both pass through the outer shell. A heat exchanger is disposed in the mounting cavity. The heat exchanger is provided with a first water inlet and a first water outlet. The first water outlet is connected to the hot water inlet pipe, and the first water inlet is connected to the cold water outlet pipe. A heater is disposed within the mounting cavity and exchanges heat with the heat exchanger.

[0006] As an optional implementation, the hot water chamber is provided with a first shell, the first shell being provided with a first inlet and a first outlet, the first inlet being located at the top of the first shell and the first outlet being located at the bottom of the first shell, the first inlet being connected to the hot water inlet pipe and the first outlet being connected to the hot water outlet pipe; the cold water chamber is provided with a second shell, the second shell being provided with a second inlet and a second outlet, the second inlet being located at the bottom of the second shell and the second outlet being located at the top of the second shell, the second outlet being connected to the cold water outlet pipe and the second inlet being connected to the cold water inlet pipe.

[0007] As an optional implementation, the second housing is provided with a first opening and a second opening, the first opening corresponding to the first water inlet and the second opening corresponding to the first water outlet, the hot water inlet pipe passing through the first opening and communicating with the first water inlet, and the hot water outlet pipe passing through the second opening and communicating with the first water outlet.

[0008] As an optional implementation, the cold water inlet pipe extends into the second housing with an inlet extension pipe, and the cold water outlet pipe extends into the second housing with an outlet extension pipe.

[0009] As an optional implementation, the housing includes a top plate, a side plate, and a bottom plate, which together form the mounting cavity. A door panel is provided on one side of the side plate, and the door panel is detachably connected to the top plate and the bottom plate. The top plate is connected to the top of the side plate, and the bottom plate is connected to the bottom of the side plate. The hot water outlet pipe and the cold water inlet pipe both pass through the bottom plate.

[0010] As an optional implementation, the side panel has multiple heat dissipation holes on the side away from the door panel.

[0011] As an optional implementation, the heater is a burner, and the heat exchanger includes a heat exchange shell and a heat exchange tube. The heat exchange shell exchanges heat with the burner and is located above the burner. The first water inlet and the first water outlet are respectively located at both ends of the heat exchange tube.

[0012] As an optional implementation, the mounting cavity is also provided with a fan and a smoke hood. The air inlet of the fan is connected to the smoke hood. The smoke hood covers the top of the heat exchange shell and is connected to the heat exchange shell.

[0013] As an optional implementation, the top plate is provided with a smoke exhaust pipe, and the air outlet of the fan is connected to the smoke exhaust pipe.

[0014] As an optional implementation, the mounting cavity is also provided with a gas proportional valve and a gas connector. The gas proportional valve is located at the bottom end of the burner, and the gas connector is located on the base plate. The gas proportional valve is connected to the burner through a gas pipe and is in communication with the gas connector.

[0015] In summary, the water heater provided by this utility model has the following technical effects: a constant temperature component is set in the installation cavity, which includes a cold water chamber and a hot water chamber, and the hot water chamber is set in the cold water chamber. Therefore, when the user stops the water supply, the cold water and hot water in the constant temperature component will exchange heat, thereby reducing the outlet water temperature when the water is turned on again, and the water temperature rise effect during water outage is excellent. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ; Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ; Figure 3 This is a schematic cross-sectional view of the structure of this utility model; Figure 4 This is a schematic diagram of the structure of the constant temperature component of this utility model; Figure 5 This is a cross-sectional view of the structure of the constant temperature component of this utility model.

[0018] The meanings of the reference numerals in the attached drawings are as follows: 1. Outer shell; 11. Top plate; 12. Side plate; 121. Door plate; 13. Bottom plate; 2. Thermostatic component; 21. Hot water chamber; 211. Hot water inlet pipe; 212. Hot water outlet pipe; 213. First shell; 214. First inlet; 215. First outlet; 22. Cold water chamber; 221. Cold water inlet pipe; 2211. Inlet extension pipe; 222. Cold water outlet pipe; 2221. Outlet extension pipe; 223. Second shell; 2231. First opening; 2232. Second opening; 224. Second inlet; 225. Second outlet; 3. Heat exchanger; 31. First inlet end; 32. First outlet end; 4. Heater; 5. Fan; 6. Smoke hood; 7. Exhaust pipe; 8. Gas proportional valve; 9. Gas connector. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] In this invention, the terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," "middle," "vertical," "horizontal," "lateral," and "longitudinal" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0021] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0022] Furthermore, the terms "installation," "setup," "equipped with," "connection," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this utility model based on the specific circumstances.

[0023] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0024] The technical solution of this utility model will be further described below with reference to the embodiments and accompanying drawings.

[0025] See Figures 1 to 5 This utility model discloses a water heater, including a shell 1, a thermostatic component 2, a heat exchanger 3 and a heater 4. The shell 1 is provided with an installation cavity, and the thermostatic component 2, the heat exchanger 3 and the heater 4 are all arranged in the installation cavity.

[0026] The specific thermostatic component 2 includes a cold water tank 22 and a hot water tank 21 disposed within the cold water tank 22, so that the cold water in the cold water tank 22 and the hot water in the hot water tank 21 can exchange heat. The hot water tank 21 is provided with a hot water inlet pipe 211 and a hot water outlet pipe 212, both of which pass through the cold water tank 22. The hot water inlet pipe 211 is located at the top of the hot water tank 21, and the hot water outlet pipe 212 is located at the bottom of the hot water tank 21. Therefore, the flow direction of hot water in the hot water tank 21 is from top to bottom. The cold water tank 22 is provided with a cold water inlet pipe 221 and a cold water outlet pipe 222. The cold water inlet pipe 221 is located at the bottom of the cold water tank 22, and the cold water outlet pipe 222 is located at the top of the cold water tank 22. Therefore, the flow direction of cold water in the cold water tank 22 is from bottom to top. Therefore, during use, cold water flows from the cold water connector into the cold water chamber 22 from bottom to top, while hot water flows from the hot water chamber 21 from top to bottom to the hot water connector, realizing the flow of cold and hot water between the thermostat and the outside world.

[0027] In addition, both the hot water outlet pipe 212 and the cold water inlet pipe 221 are installed at the bottom of the outer casing 1. The bottom of the outer casing 1 is provided with a cold water connector and a hot water connector. The cold water connector is connected to the cold water inlet pipe 221, and the hot water connector is connected to the hot water inlet pipe 211, so as to introduce cold water into the cold water chamber and export hot water to the hot water chamber.

[0028] The heat exchanger 3 is provided with a first inlet end 31 and a first outlet end 32. The first inlet end 31 is connected to the cold water outlet pipe 222, and the first outlet end 32 is connected to the hot water inlet pipe 211. In use, the cold water in the cold water tank 22 flows into the heat exchanger 3 through the cold water outlet pipe 222 and the first inlet end 31. After heat exchange with the heater 4, the heat exchanger 3 obtains heat, heats the cold water in it to hot water, and flows out from the first outlet end 32. It then flows into the hot water tank 21 through the hot water inlet pipe 211. The whole process is smooth and short. After the hot water is heated, it flows directly into the hot water tank 21, and heat loss is not easy.

[0029] Based on the above structure, when the user continuously uses the water heater of this utility model with hot water, cold water flows into the cold water chamber 22 through the cold water connector, then flows out from the cold water outlet pipe 222, and then flows into the heat exchanger 3 through the first water inlet 31. The heat exchanger 3 and the heater 4 fully exchange heat, thereby heating the cold water in the heat exchanger 3 to hot water. The hot water flows out of the heat exchanger 3 through the first water outlet 32, flows into the hot water chamber 21 through the hot water inlet pipe 211, then flows out of the hot water chamber 21 through the hot water outlet pipe 212, and finally flows out of the water heater through the hot water connector. At this time, the water in the cold water chamber 22 and the hot water chamber 21 has a short residence time and a very low heat exchange efficiency, and the impact on the outlet water temperature is negligible.

[0030] When the water supply is interrupted, the residual heat in heat exchanger 3 causes the water temperature inside to continue to rise. Simultaneously, the water in cold water tank 22 and hot water tank 21 remains stagnant, increasing the residence time and prolonging the heat exchange time between the cold and hot water. The cold water absorbs heat from the hot water, causing the temperature of the hot water in hot water tank 21 to decrease. Therefore, when the user turns the water back on, although the hot water in heat exchanger 3 immediately flows into hot water tank 21, the cooled water in hot water tank 21 will first cool the hot water before it flows out, thus reducing the temperature rise during the water outage and preventing the hot water from affecting the outlet water temperature. Furthermore, the cold water in cold water tank 22 absorbs heat from the hot water during the water outage, reducing the heat required for the cold water to heat in heat exchanger 3 when the water is turned back on, thus reducing energy consumption and heating time.

[0031] Compared to existing technologies, the thermostatic component 2 is often a single compartment that only holds hot water. Cold water flows in from the cold water inlet and goes directly to the heat exchanger 3, where it is heated before flowing back to the thermostatic component 2 and then out of the water heater from the hot water inlet. As a result, when the water supply is interrupted, the hot water in the thermostatic component 2 can only cool down through air radiation, which is inefficient. Furthermore, the residual heat in the heat exchanger 3 causes the water temperature inside to continue to rise. Therefore, when the user turns the water back on, the hot water in the heat exchanger 3 will first flow into the thermostatic component 2, raising the temperature before flowing out of the water heater. This results in poor temperature rise during water outages, and the heat lost through air radiation also causes a small amount of heat loss.

[0032] Therefore, in this embodiment, the constant temperature component 2 is set as a cold water tank 22 and a hot water tank 21, with the hot water tank 21 located inside the cold water tank 22. When the user stops the water supply, the water in the hot water tank 21 and the cold water tank 22 can exchange heat. When the user turns the water back on, the cooled hot water in the hot water tank 21 mixes with the high-temperature water heated by the residual heat in the heat exchanger 3, reducing the outlet water temperature. The water temperature rise effect during water outage is good, and the cold water in the cold water tank 22 is still heating up when the water supply is stopped. After the water is turned on, the heat and time required for heating in the heat exchanger 3 are less, thus reducing energy consumption.

[0033] Furthermore, the hot water chamber 21 is provided with a first housing 213, on which a first inlet 214 and a first outlet 215 are provided. The first inlet 214 is located at the top of the first housing 213, and the first outlet 215 is located at the bottom of the first housing 213. The hot water inlet pipe 211 passes through the cold water chamber 22 and is connected to the first inlet 214, and the hot water outlet pipe 212 passes through the cold water chamber 22 and is connected to the first outlet 215. Correspondingly, the cold water chamber 22 is also provided with a second housing 223, on which a second inlet 224 and a second outlet 225 are provided. The second inlet 224 is located at the bottom of the second housing 223, and the second outlet 225 is located at the top of the second housing 223. The second inlet 224 is connected to the cold water inlet pipe 221, and the second outlet 225 is connected to the cold water outlet pipe 222. Since the water in the hot water tank 21 and the cold water tank 22 needs to exchange heat when the user stops the water supply, in order to improve the efficiency of heat exchange, the first housing 213 and the second housing 223 are arranged alternately to increase the contact area between the cold water and the first housing 213.

[0034] Since the first housing 213 is located inside the second housing 223, both the hot water inlet pipe 211 and the hot water outlet pipe 212 need to pass through the second housing 223 to connect with the first housing 213. Therefore, the second housing 223 is also provided with a first opening 2231 and a second opening 2232. The first opening 2231 is located at the top of the second housing 223, and the second opening 2232 is located at the bottom of the second housing 223. The first opening 2231 is corresponding to the first water inlet 214, and the hot water inlet pipe 211 passes through the first opening 2231 and is connected to the first water inlet 214. The second opening 2232 is corresponding to the first water outlet 215, and the hot water outlet pipe 212 passes through the second opening 2232 and is connected to the first water outlet 215. In this way, when the user continuously turns on the water, the hot water flows through the hot water inlet pipe 211, the second opening 2232, the first inlet 214, the first housing 213, the first outlet 215, the first opening 2231, and the hot water outlet pipe 212, while the cold water flows through the cold water inlet pipe 221, the second inlet 224, the second housing 223, the second outlet 225, and the cold water outlet pipe 222. The flow paths of the hot and cold water do not interfere with each other, resulting in high water transmission efficiency.

[0035] In addition, both the cold water inlet pipe 221 and the cold water outlet pipe 222 extend straight into the second housing 223 with inlet extension pipe 2211 and outlet extension pipe 2221, respectively. This prevents the cold water from entering the second housing 223 from the second inlet 224 and flowing directly to the second outlet 225 along the inner wall of the second housing 223 due to the pipe openings being flush with the surface of the second housing 223. This would reduce the flow rate of the cold water in the middle of the second housing 223, causing it to exchange heat with the outer wall of the first housing 213 for a long time, resulting in a higher temperature of the cold water inside the second housing 223. As a result, when the user stops the water supply, the temperature difference between the cold and hot water will decrease, and the effect of temperature rise during water outage will be weakened. With the inlet extension pipe 2211 and the outlet extension pipe 2221 installed, cold water is directly flushed from the inlet extension pipe 2211 to the middle of the second housing 223, dispersing the cold water on the outer wall of the second housing 223 and increasing the overall flow rate of cold water inside the second housing 223. Meanwhile, the outlet extension pipe 2221 first draws away the cold water in the middle of the second housing 223, reducing the contact time between the cold water in the middle and the outer wall of the first housing 213, thus stabilizing the temperature of the cold water inside the second housing 223 and ensuring that the temperature difference between the cold water and hot water remains large, thereby improving the stability of the temperature rise effect during water outages.

[0036] Specifically, the outer casing 1 includes a top plate 11, a side plate 12, and a bottom plate 13. A door panel 121 is mounted on the side plate 12. The top plate 11, side plate 12, bottom plate 13, and door panel 121 form an installation cavity. The door panel 121 is detachably connected to both the top plate 11 and the bottom plate 13. The top plate 11 is connected to the top of the side plate 12, and the bottom plate 13 is connected to the bottom of the side plate 12. Both hot and cold water connectors are located on the bottom plate 13. For maintenance, the door panel 121 can be easily removed.

[0037] In addition, multiple heat dissipation holes are provided on the side 12 away from the door panel 121. When the water heater is in use, the heat generated by each component can be dissipated through the heat dissipation holes to prevent safety hazards caused by excessive internal temperature.

[0038] Specifically, the heater 4 is a burner, the water heater is a gas water heater, and the heat exchanger 3 includes a heat exchange shell and heat exchange tubes. The heat exchange tubes are arranged in a convoluted manner inside the heat exchange shell. The heat exchange shell exchanges heat with the burner and is located above the burner. The first water inlet 31 and the first water outlet 32 ​​are respectively located at the two ends of the heat exchange tubes. In use, the high-temperature flue gas generated by the burner enters the heat exchange shell, and cold water flows into the heat exchange tubes from the first water inlet 31. After fully contacting the heat in the heat exchange shell and heating up, it flows out from the first water outlet 32 ​​to the hot water chamber 21. The heating speed is fast and the immediacy is high.

[0039] Correspondingly, a fan 5 and a smoke hood 6 are installed inside the mounting cavity. The air inlet of the fan 5 is connected to the smoke hood 6, which is positioned over the top of the heat exchange shell and is also connected to it. During operation, the fan 5 runs, creating a negative pressure inside the smoke hood 6. This allows the cooled flue gas inside the heat exchange shell to enter the smoke hood 6, preventing the pressure inside the heat exchange shell from rising due to untimely flue gas discharge. This would prevent the high-temperature flue gas generated by the burner from entering the heat exchange shell, thus affecting the heating effect of the cold water.

[0040] Since the flue gas inside the fume hood 6 needs to be discharged from the water heater, a flue pipe 7 is installed on the top plate 11, which is connected to the air outlet of the fan 5. During use, the fan 5 operates, drawing the flue gas from the fume hood 6 through the air inlet, then through the air outlet into the flue pipe 7, and finally through the flue pipe 7 to the outside, so that the cooled flue gas can be discharged to the outside in a timely manner, maintaining the normal operation of all components.

[0041] Furthermore, a gas proportional valve 8 and a gas connector 9 are installed within the mounting cavity. The gas proportional valve 8 is located at the bottom end of the burner, and the gas connector 9 is located on the base plate 13. The gas proportional valve 8 is connected to the burner via a gas pipe and is in communication with the gas connector 9. In use, gas enters the gas proportional valve 8 from the gas connector 9, and after being regulated by the gas proportional valve 8, it enters the burner through the gas pipe. High-temperature flue gas is formed inside the burner and then enters the heat exchange shell to heat the cold water in the heat exchange tubes. The specific structures and operating principles of the heat exchanger 3, burner, fan 5, smoke hood 6, exhaust pipe 7, and gas proportional valve 8 are all existing technologies and will not be described in detail here.

[0042] The technical means disclosed in this utility model are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of this utility model, and these improvements and modifications are also considered within the scope of protection of this utility model.

Claims

1. A water heater, characterized in that: The outer casing has a mounting cavity inside it; A thermostatic component is disposed within the mounting cavity. The thermostatic component includes a hot water chamber and a cold water chamber. The hot water chamber is disposed within the cold water chamber to allow heat exchange between the water in the cold water chamber and the water in the hot water chamber. The hot water chamber is provided with a hot water inlet pipe and a hot water outlet pipe, both of which pass through the cold water chamber. Cold water inlet pipes and cold water outlet pipes are provided on both sides of the cold water chamber. The hot water outlet pipe and the cold water inlet pipe both pass through the outer shell. A heat exchanger is disposed in the mounting cavity. The heat exchanger is provided with a first water inlet and a first water outlet. The first water outlet is connected to the hot water inlet pipe, and the first water inlet is connected to the cold water outlet pipe. A heater is disposed within the mounting cavity and exchanges heat with the heat exchanger.

2. A water heater according to claim 1, characterized in that: The hot water chamber is provided with a first shell, the first shell having a first inlet and a first outlet. The first inlet is located at the top of the first shell, and the first outlet is located at the bottom of the first shell. The first inlet is connected to the hot water inlet pipe, and the first outlet is connected to the hot water outlet pipe. The cold water chamber is provided with a second shell, the second shell having a second inlet and a second outlet. The second inlet is located at the bottom of the second shell, and the second outlet is located at the top of the second shell. The second outlet is connected to the cold water outlet pipe, and the second inlet is connected to the cold water inlet pipe.

3. A water heater according to claim 2, characterized in that: The second housing is provided with a first opening and a second opening. The first opening corresponds to the first water inlet, and the second opening corresponds to the first water outlet. The hot water inlet pipe passes through the first opening and is connected to the first water inlet, and the hot water outlet pipe passes through the second opening and is connected to the first water outlet.

4. A water heater as claimed in claim 2 wherein: The cold water inlet pipe extends into the second housing as an inlet extension pipe, and the cold water outlet pipe extends into the second housing as an outlet extension pipe.

5. A water heater according to claim 1, characterized in that: The outer casing includes a top plate, a side plate, and a bottom plate. The top plate, the side plate, and the bottom plate enclose the mounting cavity. A door panel is provided on one side of the side plate. The door panel is detachably connected to the top plate and the bottom plate. The top plate is connected to the top of the side plate, and the bottom plate is connected to the bottom of the side plate. The hot water outlet pipe and the cold water inlet pipe both pass through the bottom plate.

6. A water heater according to claim 5, characterized in that: The side panel away from the door panel has multiple heat dissipation holes.

7. A water heater according to claim 5, characterized in that: The heater is a burner, and the heat exchanger includes a heat exchange shell and a heat exchange tube. The heat exchange shell exchanges heat with the burner and is located above the burner. The first water inlet and the first water outlet are respectively located at the two ends of the heat exchange tube.

8. A water heater according to claim 7, characterized in that: The installation cavity is also equipped with a fan and a smoke hood. The air inlet of the fan is connected to the smoke hood. The smoke hood covers the top of the heat exchange shell and is connected to the heat exchange shell.

9. A water heater according to claim 8, characterized in that: The top plate is equipped with a smoke exhaust pipe, and the air outlet of the fan is connected to the smoke exhaust pipe.

10. A water heater according to claim 7, characterized in that: The installation cavity is also equipped with a gas proportional valve and a gas connector. The gas proportional valve is located at the bottom end of the burner, and the gas connector is located on the base plate. The gas proportional valve is connected to the burner through a gas pipe and is in communication with the gas connector.

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