Water heater

Abstract

The invention discloses a water heater, and relates to the technical field of heat exchange equipment, the water heater comprises a shell, a combustion heat exchange system and an electric control box, and the shell is provided with an air inlet channel; the combustion heat exchange system is arranged on the shell, the combustion heat exchange system comprises a combustor and a fan, and the fan is arranged below the combustor; and the electric control box is arranged in the air inlet channel and is close to the fan. According to the technical scheme, the electric control box is arranged in the air inlet channel, heat generated by the electric control box is rapidly taken away by flowing air in a convection mode, the heat dissipation efficiency of forced convection is far higher than that of natural convection, the air flowing speed is higher, the heat transfer efficiency is higher, and therefore the heat dissipation efficiency of the electric control box is improved.

Description

Technical Field

[0001] The invention relates to the technical field of heat exchange equipment, and in particular to a water heater. Background Art

[0002] In the related prior art, during the continuous use of the gas water heater, there is a problem that the heat emitted by the electric control box cannot be removed in time, causing the ambient temperature to be too high, thus affecting the overall life of the electric control board. Summary of the invention

[0003] The main purpose of the present invention is to provide a water heater, aiming to improve the heat dissipation efficiency of an electric control box in the water heater.

[0004] In order to achieve the above object, the present invention provides a water heater, which comprises:

[0005] The housing comprises an outer shell, an inner shell and a flow guide, wherein the inner shell is arranged inside the outer shell; the flow guide is arranged between the outer shell and the inner shell, and the flow guide, the outer shell and the inner shell surround an air inlet and outlet passage;

[0006] a combustion heat exchange system, disposed in the housing, the combustion heat exchange system comprising a burner and a fan, the fan being disposed below the burner; and

[0007] The electric control box is arranged in the air inlet passage and close to the fan.

[0008] In one embodiment, the outer shell includes a top plate and two side plates arranged opposite to each other, the top plate is provided with an air inlet, and the air inlet is connected to the air inlet channel; the electric control box is arranged between one of the side plates and the inner shell, and the flow guide is arranged between the top plate and the inner shell.

[0009] In one embodiment, the housing further includes a back plate and a panel, the top plate is connected between the back plate and the panel at the top surface of the water heater, and the side plate is connected between the back plate and the panel at the side surface of the water heater.

[0010] In one embodiment, the guide member includes a guide plate and a connecting flange provided on the guide plate, the connecting flange is connected to the inner shell, the guide plate is located between the top plate and the inner shell, the guide plate has a guide cavity with an opening on one side, and the air inlet, the guide cavity and the opening are connected in sequence.

[0011] In one embodiment, the guide plate includes a first guide portion, a second guide portion and a third guide portion which are bent and connected in sequence, the second guide portion is arranged between the panel and the back panel, the first guide portion is located on the side of the second guide portion close to the back panel, and the third guide portion is located on the side of the second guide portion close to the panel.

[0012] In one embodiment, there is a gap between the guide member and the top plate.

[0013] In one embodiment, there is a gap between the guide plate and the top plate.

[0014] In one embodiment, there is a gap between the first air guide portion and the back plate, and / or there is a gap between the third air guide portion and the panel.

[0015] In one embodiment, the electrical control box includes a box body and an electrical control board arranged on the box body; the box body has a accommodating cavity, an air outlet and a vent, the air outlet, the accommodating cavity and the vent are connected in sequence to form a heat dissipation channel, and the heat dissipation channel is connected to the air inlet channel.

[0016] In one embodiment, the ventilation opening is located on an end surface of the box body close to the fan, and the air outlet is arranged on a side of the box body away from the burner.

[0017] In one embodiment, the air vents are arranged in a strip shape, and there are multiple air vents, which are arranged at intervals along the length direction of the box body; the electric control box is provided with a protrusion at the periphery of the air vents.

[0018] In one embodiment, the guide member is a stainless steel plate or a galvanized plate; and / or the box body is made of flame-retardant ABS.

[0019] The technical solution of the present invention arranges the electric control box in the air inlet channel of the water heater, and the heat generated by the electric control box is quickly carried away by the flowing air through convection. The heat dissipation efficiency of this forced convection is much higher than that of natural convection, the air flows faster, and the heat transfer efficiency is higher, thereby improving the heat dissipation efficiency of the electric control box. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0021] Figure 1 A schematic structural diagram of an embodiment of a water heater provided by the present invention;

[0022] Figure 2 for Figure 1 Schematic diagram of the installation structure of the middle guide piece;

[0023] Figure 3It is a cross-sectional view of the electric control box from one perspective;

[0024] Figure 4 The figure is a schematic diagram of an embodiment of the airflow direction in the electric control box.

[0025] Description of Figure Numbers:

[0026] 1. Water heater; 10. Shell; 100. Outer shell; 110. Top plate; 120. Back plate; 200. Inner shell; 300. Guide member; 310. Guide plate; 311. First guide part; 312. Second guide part; 313. Third guide part; 320. Connecting flange; 301. Opening; 302. Guide cavity; 400. Smoke exhaust pipe; 11. Air inlet channel; 12. Air inlet; 20. Combustion heat exchange system; 21. Burner; 22. Fan; 30. Electric control box; 31. Box body; 31a. Accommodating cavity; 31b. Air outlet; 31c. Ventilation port; 32. Electric control board; 33. Raised part.

[0027] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of the features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0031] The present invention proposes a water heater, which aims to improve the heat dissipation efficiency of the electric control box in the water heater. The water heater is usually a gas water heater, and the following description will take the gas water heater as an example. For ease of understanding and description, the following description of the present invention is attached. Figures 1 to 4 , solid arrows indicate spaces, openings, or holes.

[0032] See also Figures 1 to 3 In one embodiment of the present invention, the water heater 1 includes a shell 10, a combustion heat exchange system 20 and an electronic control box 30. The shell 10 is provided with an air inlet channel 11. The combustion heat exchange system 20 is arranged in the shell 10. The combustion heat exchange system 20 includes a burner 21 and a fan 22. The fan 22 is arranged below the burner 21; the electronic control box 30 is arranged in the air inlet channel 11 and is arranged close to the fan 22.

[0033] The housing 10 mainly includes an outer shell 100 and an inner shell 200. The outer shell 100 is mainly used to provide structural support and stabilize the internal components of the gas water heater 1. The inner shell 200 is arranged in the outer shell 100. The inner shell 200 is mainly used to enclose the combustion area and isolate the combustion area from other components of the water heater 1 to prevent heat leakage, reduce the high temperature impact of other components and the outer shell 100 during the operation of the water heater 1, and avoid the overall temperature of the equipment from being too high, thereby improving the service life. The burner 21 is arranged in the inner shell 200. The air outlet side of the fan 22 is connected to the air inlet of the burner 21, and the air inlet side of the fan 22 is connected to the air inlet channel 11. The fan 22 is arranged in the inner shell 200, and the fan 22 is located between the outer shell 100 and the inner shell 200.

[0034] In this embodiment, in order to improve the heat dissipation efficiency of the electric control box 30, the shell further includes a guide member 300, which is arranged between the outer shell 100 and the inner shell 200, and the guide member 300, the outer shell 100 and the inner shell 200 surround the air inlet channel 11.

[0035] Among them, the main function of the guide member 300 is to guide the airflow. The guide member 300 allows more external airflow to flow through the electrical control box 30 to dissipate heat from the electrical control box 30, thereby improving the heat dissipation efficiency. Compared with the case without the guide member 300, in this embodiment, the air flow in the water heater 1 is more organized and the cooling efficiency is higher.

[0036] In the technical solution of the present invention, the electric control box 30 is arranged in the air inlet channel 11 formed between the outer shell 100, the inner shell 200 and the air guide 300, and the electric control box 30 is arranged close to the fan 22. In this way, the heat generated by the electric control box 30 can be quickly taken away by the flowing air by convection. The heat dissipation efficiency of this forced convection is much higher than that of natural convection, and the air flow speed is faster and the heat transfer efficiency is higher, thereby improving the heat dissipation efficiency of the electric control box 30.

[0037] The following will Figure 1 and Figure 2 The structure of the water heater 1 shown is introduced.

[0038] Generally speaking, the housing 100 includes a detachably connected back shell and a face cover, and a mounting cavity is enclosed between the back shell and the face cover. The back shell usually includes a back plate 120 and a top plate 110 and a bottom plate arranged at the upper and lower ends of the back plate 120. The top plate 110 and the bottom plate are respectively bent and connected to the back plate 120. The face cover usually includes a panel and mounting plates arranged on the left and right sides of the panel. In this embodiment, the panel is arranged opposite to the back plate 120. The panel is usually equipped with a temperature adjustment button or knob, and the user can set the required water temperature by adjusting it. Alternatively, the electronic panel is usually equipped with a liquid crystal display or touch buttons, etc. The top plate 110 and the bottom plate are arranged at the upper and lower ends of the back plate 120, which can better disperse and bear the weight of the internal components and reduce the deformation or damage of the bottom shell; in addition, the top plate 110 and the bottom plate can be used as mounting points to facilitate the fixing and installation of the internal components of the water heater 1, such as the burner 21, the heat exchanger or the condensing heat exchanger, etc.

[0039] The smoke exhaust port of the water heater 1 is usually arranged on the top surface of the shell 100 to facilitate the exhaust of smoke. In order to facilitate after-sales installation and reduce the number of installation holes, the smoke exhaust pipe and the air inlet pipe are usually integrated, that is, the air inlet 12 is also arranged on the top surface of the shell.

[0040] Based on this, in one embodiment, the outer shell 100 includes a top plate 110 and two side plates arranged opposite to each other, the top plate 110 is provided with an air inlet 12, and the air inlet 12 is connected to the air inlet channel 11; the electric control box 30 is arranged between one of the side plates and the inner shell 200, and the guide member 300 is arranged between the top plate 110 and the inner shell 200.

[0041] For example, Figure 1 The embodiment is described as an example, the housing 100 includes a top plate 110, a left side plate and a right side plate. When the electric control box 30 is arranged between the left side plate and the inner housing 200, the air inlet 12 is arranged on the top plate 100, and the air guide 300 is arranged to guide most of the airflow to the left side, so that the external airflow can flow through the electric control box 30 more effectively, thereby improving the heat dissipation efficiency. Conversely, when the electric control box 30 is arranged between the right side plate and the inner housing 200, the air guide 300 is arranged to guide most of the airflow to the right side, so that the external airflow can flow through the electric control box 30 more effectively, thereby improving the heat dissipation efficiency.

[0042] Exemplarily, the housing 100 also includes a back panel 120 and a panel, the top panel 110 is connected between the back panel 120 and the panel on the top surface of the water heater 1, the side panel is connected between the back panel 120 and the panel on the side of the water heater 1, and the electrical control box 30 is also arranged between the back panel 120 and the panel.

[0043] Based on the previous embodiment, please refer to Figure 2 The guide member 300 includes a guide plate 310 and a connecting flange 320 provided on the guide plate 310, the connecting flange 320 is connected to the inner shell 200, the guide plate 310 is located between the top plate 110 and the inner shell 200, the guide plate 310 has a guide cavity 302 with an opening 301 on one side, and the air inlet 12, the guide cavity 302 and the opening 301 are connected in sequence.

[0044] Furthermore, the guide plate 310 includes a first guide portion 311, a second guide portion 312 and a third guide portion 313 which are bent and connected in sequence, the second guide portion 312 is arranged between the panel and the back panel 120, the first guide portion 311 is located on the side of the second guide portion 312 close to the back panel 120, and the third guide portion 313 is located on the side of the second guide portion 312 close to the panel.

[0045] In this embodiment, Figure 2As shown, the inner shell 200 and the outer shell 100 are arranged in a square body, and the first guide part 311, the second guide part 312 and the third guide part 313 enclose a guide cavity 302 set with a left opening 301, thereby guiding most of the airflow to the left side, so that the external airflow can flow through the electric control box 30 more effectively, thereby improving the heat dissipation efficiency.

[0046] In other embodiments, the guide plate 310 may have only the second guide portion 312 , or the guide member 300 may have only the first guide portion 311 and the second guide portion 312 , or the guide member 300 may have only the third guide portion 313 and the second guide portion 312 .

[0047] In another embodiment, the housing 10 further includes a smoke exhaust pipe 400, the housing 10 further includes a smoke exhaust pipe 400, the inner shell 200 is provided with a smoke exhaust port connected to the smoke exhaust pipe 400, and the smoke exhaust pipe 400 is sequentially arranged through the guide cavity and the air inlet 12. In this embodiment, the housing 10 further includes an air inlet pipe, and since the air inlet 12 and the smoke exhaust port of the water heater 1 need to be connected to the outdoors, in order to facilitate after-sales installation, the smoke exhaust pipe 400 is sleeved in the air inlet pipe, and preferably, the air inlet pipe and the smoke exhaust pipe 400 are coaxially arranged.

[0048] In this embodiment, the guide plate 310 is configured to have a guide cavity with an opening on one side, and the air inlet 12, the guide cavity and the opening are connected in sequence, which can effectively guide the air from the air inlet 12 to the area where the electric control box is located. In addition, the guide cavity formed in the guide plate 310 allows the airflow flowing in from the air inlet 12 to maintain a high flow rate and flow direction stability under the guidance of the guide cavity when passing through the guide cavity, thereby improving the guide effect. Secondly, the guide plate 310 is located between the top plate 110 and the inner shell 200, forming a specific guide channel. The shape and position of the guide plate 310 can effectively guide the airflow, make the air flow more orderly, reduce the formation of vortices and fluid resistance, and thus improve the efficiency of air flow.

[0049] In addition, it can be understood that, in one embodiment, the guide plate 310 and the connecting flange 320 are formed by a sheet metal through bending, cutting and other processes. In this way, by setting the connecting flange 320 to be connected to the inner shell 200, the overall structural stability of the guide member is enhanced, the vibration or displacement of the guide member during operation is reduced, and the airflow can flow smoothly along a predetermined path, reducing the turbulence and energy loss of the airflow.

[0050] In one embodiment, there is a gap between the guide plate 310 and the top plate 110, so that part of the airflow flowing in from the air inlet enters the space on the side between the inner shell and the outer shell that does not contain the electronic control box. In this way, the guide plate 310 will not be displaced or deformed during use due to excessive air pressure, squeezing during transportation, or other factors.

[0051] Among them, the guide plate 310 includes a first guide part 311, a second guide part 312 and a third guide part 313, and there is a distance between the guide plate 310 and the top plate 110. It should be understood that at least one of the first guide part 311, the second guide part 312 and the third guide part 313 has a distance from the top plate 110.

[0052] In order to make the electric control box 30 have a better heat dissipation effect, the spacing should not be too large. Preferably, the spacing is less than 5.0 mm. For example, the spacing can refer to Figure 1 The h in the spacing h can be 1.0mm, 2.0mm, 3.0mm, 4.0mm or 4.8mm, etc.

[0053] In one embodiment, there is a gap between the guide plate 310 and the top plate 110 , there is a gap between the first guide portion 311 and the back plate 120 , and / or there is a gap between the third guide portion 313 and the panel.

[0054] In this embodiment, at least the following schemes are included: there is a gap between the first guide part 311 and the back plate 120, or there is a gap between the third guide part 313 and the panel, or there is a gap between the first guide part 311 and the back plate 120, and there is a gap between the third guide part 313 and the panel.

[0055] Thus, in this embodiment, by providing a gap between the first guide portion 311 and the back plate 120, and / or a gap between the third guide portion 313 and the panel, the guide plate 310 has a larger tolerance space when subjected to thermal expansion, vibration or pressure changes; secondly, the setting of the gap also facilitates the modular installation of the guide plate 310, and the guide plate 310 does not need to be strictly and tightly matched with the panel and the back plate, which is conducive to assembly and disassembly and reduces maintenance costs.

[0056] Based on any of the above embodiments, the electric control box 30 includes a box body 31 and an electric control board 32 arranged on the box body 31; the box body 31 has a accommodating cavity 31a, an air outlet 31b and a vent 31c, and the air outlet 31b, the accommodating cavity 31a and the vent 31c are connected in sequence to form a heat dissipation channel, and the heat dissipation channel is connected to the air inlet channel 11.

[0057] In this embodiment, the air outlet 31b, the accommodating cavity 31a and the vent 31c form a heat dissipation channel inside the electric control box 30, and the heat dissipation channel is connected to the air inlet channel 11. Such a configuration allows air to quickly enter and leave the electric control box 30, reducing the residence time of heat in the box. The continuous airflow quickly takes away the generated heat, thereby reducing the temperature of the electric control board 32 and other components.

[0058] In one embodiment, the vent 31c is located at the end surface of the box body 31 close to the fan 22. In this embodiment, by arranging the vent 31c at a position close to the fan 22, the suction force of the fan 22 can be used to extract hot air from the electric control box 30, thereby reducing the circulation of hot air in the box and improving the heat dissipation efficiency.

[0059] In another embodiment, the air vent 31b is disposed on a side of the box body 31 away from the burner 21. In this embodiment, the air vent 31b is disposed on a side away from the burner 21 to prevent the heat generated by the burner 21 from directly affecting the heat dissipation of the electric control box 30. This design helps to maintain the internal temperature of the electric control box 30 stable, avoid the temperature rise caused by the heat of the burner 21, and improve the reliability and life of the electronic components.

[0060] In another embodiment, the air vent 31b is arranged in a long strip shape, and the air vent 31b is extended along the width direction of the box body 31. In this embodiment, the design of the long strip air vent 31b can promote natural convection, that is, using the principle of hot air rising and cold air sinking, the heat generated by the internal components is taken away by air flow, thereby improving the heat dissipation capacity of the electric control box; the air vent 31b extends along the width direction of the box body, which can promote the circulation of air in the box body, making it easier for hot air to be discharged and cold air to enter quickly, thereby effectively reducing the temperature inside the box body. Of course, in other embodiments, the air vent 31b can also be a regular shape such as a circle, a square, an ellipse, or other irregular shapes.

[0061] On the basis of the previous embodiment, there are multiple air outlets 31 b , and the multiple air outlets 31 b are arranged at intervals along the length direction of the box body 31 .

[0062] The number of the air vents 31b can be two, three, four, five, six, seven, eight, nine, ten or more. In this embodiment, the plurality of air vents 31b are extended along the width direction of the box body 31. The plurality of air vents are arranged at intervals, so that different areas inside the electric control box can get proper air circulation, avoiding excessive accumulation of heat in a certain local area, making the heat dissipation more uniform. Secondly, the reasonable layout of the air vents 31b can enhance the natural convection to achieve more efficient passive heat dissipation.

[0063] In another embodiment, in order to prevent water entering the housing 10 from the smoke exhaust pipe 400 from entering the electric control box 30 , the electric control box 30 is provided with a protrusion 33 at the periphery of the air outlet 31 b .

[0064] The raised portion 33 may be arranged in a circle around the air outlet 31b, or may be an elongated raised portion 33 arranged above the air outlet 31b. In this way, the raised portion 33 can effectively block the water flow and prevent it from entering the electric control box 30 through the air outlet 31b, thereby protecting the electrical components in the electric control box 30 from water damage. Specifically, the raised portion 33 is arranged above the air outlet 31b, so that a physical barrier can be formed. Even if water enters the shell 10 along the smoke exhaust pipe 400, it will be blocked outside by the raised portion 33, thereby playing a waterproof role. In addition, the raised portion 33 can be designed to have a drainage function, directing water to other parts of the shell, thereby preventing water from entering the electric control box 30.

[0065] In one embodiment, the guide member 300 is a stainless steel plate or a galvanized plate; stainless steel has excellent corrosion resistance and can be used for a long time in a humid and corrosive environment without rusting, thereby extending the service life of the guide member 300; in addition, stainless steel has high strength and good mechanical properties, and can withstand greater pressure and impact, so that the guide member 300 is not easily deformed or damaged during long-term use. The surface of the galvanized plate has a zinc coating, which provides good anti-oxidation and corrosion resistance, and is suitable for outdoor or harsh environments, which makes the application range of the water heater 1 wider. In addition, stainless steel plates or galvanized plates are relatively easy to process, and can be cut, welded, bent, etc., so that it is easy to manufacture guide members 300 of various shapes and sizes. At the same time, the surface is smooth and easy to clean and maintain.

[0066] In another embodiment, the material of the box body 31 is flame retardant ABS. The use of flame retardant ABS material in the box body 31 of the electric control box 30 can significantly improve its fire resistance, reduce the risk of fire in the electric control box 30 under high temperature or electrical fault conditions, and ensure the safety of equipment and personnel. ABS plastic has good electrical insulation properties, can effectively prevent electrical short circuits and leakage, and improve the safety and reliability of the electric control box 30.

[0067] The above description is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A water heater, characterized in that: include: The housing comprises an outer shell, an inner shell and a flow guide, wherein the inner shell is arranged inside the outer shell; the flow guide is arranged between the outer shell and the inner shell, and the flow guide, the outer shell and the inner shell surround an air inlet and outlet passage; a combustion heat exchange system, disposed in the housing, the combustion heat exchange system comprising a burner and a fan, the fan being disposed below the burner; and The electric control box is arranged in the air inlet passage and close to the fan.

2. The water heater according to claim 1, characterized in that: The outer shell includes a top plate and two side plates arranged opposite to each other, the top plate is provided with an air inlet, and the air inlet is communicated with the air inlet channel; the electric control box is arranged between one of the side plates and the inner shell, and the flow guide is arranged between the top plate and the inner shell.

3. The water heater according to claim 2, characterized in that: The shell also includes a back plate and a panel, the top plate is connected between the back plate and the panel at the top surface of the water heater, the side plate is connected between the back plate and the panel at the side of the water heater, and the electric control box is also arranged between the back plate and the panel.

4. The water heater according to claim 3, characterized in that: The guide member includes a guide plate and a connecting flange arranged on the guide plate, the connecting flange is connected to the inner shell, the guide plate is located between the top plate and the inner shell, the guide plate has a guide cavity with an opening on one side, and the air inlet, the guide cavity and the opening are connected in sequence.

5. The water heater according to claim 4, characterized in that The guide plate includes a first guide portion, a second guide portion and a third guide portion which are bent and connected in sequence, the second guide portion is arranged between the panel and the back panel, the first guide portion is located on a side of the second guide portion close to the back panel, and the third guide portion is located on a side of the second guide portion close to the panel.

6. The water heater according to claim 2, characterized in that: There is a distance between the guide member and the top plate.

7. The water heater according to claim 5, characterized in that There is a gap between the guide plate and the top plate.

8. The water heater according to claim 7, characterized in that There is a gap between the first air guide portion and the back plate, and / or there is a gap between the third air guide portion and the panel.

9. The water heater according to any one of claims 2 to 8, characterized in that: The electric control box includes a box body and an electric control board arranged on the box body; the box body has a accommodating cavity, an air outlet and a vent, the air outlet, the accommodating cavity and the vent are connected in sequence to form a heat dissipation channel, and the heat dissipation channel is connected to the air inlet channel.

10. The water heater according to claim 9, characterized in that The ventilation opening is located at the end surface of the box body close to the fan, and the air outlet is arranged on a side of the box body away from the burner.

11. The water heater according to claim 10, characterized in that The air vents are arranged in a strip shape, there are multiple air vents, and the multiple air vents are arranged at intervals along the length direction of the box body; the electric control box is provided with a protrusion at the periphery of the air vents.

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