Water heater

Abstract

The utility model 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, 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 utility model relates to the technical field of heat exchange equipment, 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, which affects the overall life of the electric control board. Utility Model Content

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

[0004] To achieve the above-mentioned purpose, the water heater proposed in the present invention 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 enclose an air inlet and outlet channel;

[0006] a combustion and heat exchange system, disposed in the housing, the combustion and 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 channel 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 electrical 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 that 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 distance 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 in the box body; the box body has a accommodating cavity, an air outlet and a ventilation port, the air outlet, the accommodating cavity and the ventilation port 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 port is located on the end surface of the box body close to the fan, and the air outlet is provided on a side of the box body away from the burner.

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

[0018] In one embodiment, the guide member is made of 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 is to place the electronic control box in the air inlet channel of the water heater, so that the heat generated by the electronic 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 flow speed is faster, and the heat transfer efficiency is higher, thereby improving the heat dissipation efficiency of the electronic 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 following briefly introduces the drawings required for use in the embodiments or the description of the prior art. 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 any creative work.

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

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

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

[0024] Figure 4 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 and 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 embodiments described 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 making creative efforts shall fall 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 indications 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 for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. 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 mutually contradictory or cannot be implemented, it should be deemed that such a 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 a 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 utility model, the water heater 1 includes a shell 10, a combustion and heat exchange system 20 and an electrical control box 30. The shell 10 is provided with an air inlet channel 11. The combustion and heat exchange system 20 is arranged in the shell 10. The combustion and heat exchange system 20 includes a burner 21 and a fan 22. The fan 22 is arranged below the burner 21; the electrical control box 30 is arranged in the air inlet channel 11 and is arranged close to the fan 22.

[0033] Among them, the shell 10 mainly includes an outer shell 100 and an inner shell 200. The outer shell 100 mainly provides structural support and stabilizes the internal components of the gas water heater 1. The inner shell 200 is arranged in the outer shell 100. The inner shell 200 mainly encloses the combustion area and isolates 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 is located between the outer shell 100 and the inner shell 200.

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

[0035] The flow guide piece 300 mainly guides the airflow, and the flow guide piece 300 enables more external airflow to flow through the electric control box 30, thereby improving the heat dissipation efficiency of the electric control box 30; compared with the case without the flow guide piece 300, the air flow in the water heater 1 is more organized, and the cooling efficiency is higher.

[0036] In the technical scheme of the utility model, the electric control box 30 is arranged in the air inlet channel 11 formed by the outer shell 100, the inner shell 200 and the flow guide piece 300, and 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 through convection. The heat dissipation efficiency of this forced convection is much higher than that of natural convection, 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 structure of the water heater 1 shown in Figs. Figure 1 and Figure 2 will be introduced below.

[0038] Generally, the outer shell 100 comprises a detachable back shell and a face cover, and an installation cavity is formed between the back shell and the face cover. The back shell usually comprises 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, and the top plate 110 and the bottom plate are respectively bent and connected with the back plate 120. The face cover usually comprises a face plate and mounting plates arranged on the left and right sides of the face plate. In the embodiment, the face plate is arranged opposite to the back plate 120, and the face plate is usually provided with a temperature adjusting button or knob, so that the user can set the required water temperature by adjusting. Alternatively, the electronic face plate is usually provided with a liquid crystal display screen or a touch button, 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 fixation 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 outlet of the water heater 1 is usually arranged on the top surface of the outer shell 100, so as to facilitate the discharge of flue gas. In order to facilitate the 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 outer 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 described above is used as an example. The housing 100 includes a top plate 110, a left side plate, and a right side plate. When the electrical control box 30 is disposed between the left side plate and the inner housing 200, the air inlet 12 is disposed on the top plate 100. The air guide 300 is disposed to direct most of the airflow to the left side, thereby allowing external airflow to flow more efficiently through the electrical control box 30 and improving heat dissipation efficiency. Conversely, when the electrical control box 30 is disposed between the right side plate and the inner housing 200, the air guide 300 is disposed to direct most of the airflow to the right side, thereby allowing external airflow to flow more efficiently through the electrical control box 30 and improving 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 example, 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. 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 that 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 shape, 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 inner shell 200 is provided with a smoke exhaust port connected to the smoke exhaust pipe 400. 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. Since both the air inlet 12 and the smoke exhaust port of the water heater 1 need to be connected to the outdoors, the smoke exhaust pipe 400 is sleeved within the air inlet pipe to facilitate after-sales installation. Preferably, the air inlet pipe and the smoke exhaust pipe 400 are coaxially arranged.

[0048] In this embodiment, the deflector plate 310 is configured to have a guide cavity with an opening on one side. The air inlet 12, the guide cavity, and the opening are sequentially connected, effectively guiding air from the air inlet 12 to the area where the electronic control box is located. Furthermore, the guide cavity formed within the deflector plate 310 ensures that the airflow flowing in from the air inlet 12 maintains a high flow rate and flow direction stability as it passes through the guide cavity, thereby improving the diversion effect. Secondly, the deflector plate 310 is located between the top plate 110 and the inner shell 200, forming a specific diversion channel. The shape and position of the deflector plate 310 effectively guide the airflow, making the air flow more orderly, reducing the formation of vortices and fluid resistance, and thus improving 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 part 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. There is a distance between the guide plate 310 and the top plate 110. It should be understood that among the first guide part 311, the second guide part 312 and the third guide part 313, at least one 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 figure 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 having 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 tightly fitted 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 electronic control box 30 includes a box body 31 and an electronic control board 32 arranged on the box body 31; the box body 31 has a accommodating cavity 31a, an air outlet 31b and a ventilation port 31c, and the air outlet 31b, the accommodating cavity 31a and the ventilation port 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 electronic control box 30, and the heat dissipation channel is connected to the air inlet channel 11. This arrangement allows air to quickly enter and leave the interior of the electronic control box 30, reducing the residence time of heat in the box. The continuous airflow quickly carries away the generated heat, thereby reducing the temperature of the electronic control board 32 and other components.

[0058] In one embodiment, the vent 31c is located on an end surface of the box body 31 near the fan 22. In this embodiment, by locating the vent 31c near the fan 22, the suction force of the fan 22 can be utilized to draw hot air out of the electrical control box 30, thereby reducing the circulation of hot air back into the box and improving heat dissipation efficiency.

[0059] In another embodiment, the air vent 31b is located on the side of the box body 31 facing away from the burner 21. In this embodiment, positioning the air vent 31b on the side facing away from the burner 21 prevents the heat generated by the burner 21 from directly affecting the heat dissipation of the electrical control box 30. This design helps maintain a stable internal temperature of the electrical control box 30, preventing temperature increases caused by heat from the burner 21, and improving the reliability and lifespan of the electronic components.

[0060] In another embodiment, the air vent 31b is configured in an elongated strip shape and extends along the width of the box body 31. In this embodiment, the elongated air vent 31b design promotes natural convection, utilizing the principle that hot air rises and cold air sinks, allowing air flow to remove heat generated by internal components, thereby improving the heat dissipation capacity of the electronic control box. The air vent 31b extends along the width of the box body, promoting air circulation within the box body, allowing hot air to be discharged more easily and cold air to enter more 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 circular, square, or oval, or other irregular shapes.

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

[0062] The number of air vents 31b can be two, three, four, five, six, seven, eight, nine, ten, or more. In this embodiment, multiple air vents 31b extend along the width of the box body 31. The staggered arrangement of the multiple air vents ensures adequate air circulation in different areas within the electrical control box, preventing excessive heat accumulation in a single area and ensuring more uniform heat dissipation. Furthermore, the rational layout of the air vents 31b enhances natural convection to achieve more efficient passive heat dissipation.

[0063] In another embodiment, in order to avoid water entering the electric control box 30 from the smoke exhaust pipe 400, the electric control box 30 is provided with a protruding part 33 at the periphery of the air passage 31b.

[0064] The protruding part 33 can be a ring around the air passage 31b, or a long strip-shaped protruding part 33 arranged above the air passage 31b. In this way, the protruding part 33 can effectively block the water flow and prevent it from entering the electric control box 30 through the air passage 31b, thereby protecting the electrical components in the electric control box 30 from water damage. Specifically, the protruding part 33 is arranged above the air passage 31b, which can form a physical barrier. Even if water enters the housing 10 from the smoke exhaust pipe 400, it will be blocked by the protruding part 33 and play a waterproof role. In addition, the protruding part 33 can be designed to have a drainage function to guide water to other parts of the housing, thereby avoiding water entering the electric control box 30.

[0065] In an embodiment, the flow guide 300 is made of stainless steel plate or galvanized sheet. Stainless steel has excellent corrosion resistance and can be used in humid and corrosive environments for a long time without rusting, prolonging the service life of the flow guide 300. In addition, stainless steel has high strength and good mechanical properties, can withstand large pressure and impact, and can prevent the flow guide 300 from deforming or being damaged during long-term use. The galvanized sheet has a zinc coating on the surface, which provides good oxidation resistance and corrosion resistance, and is suitable for outdoor or harsh environments, making the water heater 1 more widely applicable. In addition, stainless steel plate or galvanized sheet is relatively easy to process and can be cut, welded, and bent, making it easy to manufacture flow guides 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 for the box body 31 of the electric control box 30 can significantly improve its fireproof performance and reduce the risk of fire in the electric control box 30 under high temperature or electrical fault conditions, ensuring the safety of equipment and personnel. ABS plastic has good electrical insulation properties, which can effectively prevent electrical short circuit and leakage, improving the safety and reliability of the electric control box 30.

[0067] The above description is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation or direct / indirect application in other related technical fields within the technical concept of the present application is included in the patent protection scope of the present application.

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 enclose an air inlet and outlet channel; a combustion and heat exchange system, disposed in the housing, the combustion and 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 channel and close to the fan.

2. The water heater according to claim 1, wherein 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.

3. The water heater according to claim 2, wherein: 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 surface of the water heater. The electric control box is also arranged between the back plate and the panel.

4. The water heater according to claim 3, wherein: 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.

5. The water heater according to claim 4, wherein: The guide plate includes a first guide portion, a second guide portion and a third guide portion that 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. The third guide portion is located on the side of the second guide portion close to the panel.

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

7. The water heater according to claim 5, wherein: There is a distance between the guide plate and the top plate.

8. The water heater according to claim 7, wherein: 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 ventilation port, the air outlet, the accommodating cavity and the ventilation port 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, wherein The ventilation opening is located on 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, wherein: The air vents are arranged in a long 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.

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