Heat exchange structure and water heater

Abstract

The present invention discloses a heat exchange structure and a water heater, the heat exchange structure comprises a mounting shell, a blocking member and a heat exchange pipe, the mounting shell is provided with a heat channel, the heat channel comprises a first heat outlet and a heat inlet; the blocking member is fixedly mounted on the inner wall of the heat channel, the blocking member is provided with a blocking portion, and the blocking portion and the conveying direction of the heat channel are arranged at a first angle to form a heat concentration portion for collecting part of the heat; part of the heat exchange pipe is connected to the outer wall of the mounting shell and is arranged close to the heat concentration portion to exchange heat with the heat collected in the heat concentration portion. The heat exchange structure and the water heater have high heat exchange efficiency when in use.

Description

Technical Field

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

[0002] A water heater generally includes a heat exchanger, a coil and a gas burner. The function of the heat exchanger is to absorb the heat released by the burner and then transfer the heat to the water in the coil to achieve heat conversion. Part of the coil is wrapped around the outer wall of the heat exchanger, and the rest passes through the fins in the heat exchanger. The fins absorb the heat and then transfer it to the coil.

[0003] However, when the conventional water heater is in use, the utilization rate of the heat released by the burner is not high, resulting in low heat exchange efficiency. Summary of the invention

[0004] Based on this, in order to solve the problem that the conventional water heater has low utilization rate of the heat released by the burner during use, resulting in low heat exchange efficiency, a heat exchange structure and a water heater are proposed, which have high heat exchange efficiency during use.

[0005] The specific technical solutions are as follows:

[0006] On the one hand, the present application relates to a heat exchange structure, including a mounting shell, a blocking member and a heat exchange tube, the mounting shell being provided with a heat channel, the heat channel comprising a first heat outlet and a heat inlet; the blocking member being fixedly mounted on the inner wall of the heat channel, the blocking member being provided with a blocking portion, and the blocking portion being arranged at a first angle with the conveying direction of the heat channel to form a heat concentration portion for gathering part of the heat; part of the heat exchange tube is connected to the outer wall of the mounting shell and is arranged close to the heat concentration portion to exchange heat with the heat gathered in the heat concentration portion.

[0007] When the above-mentioned heat exchange structure is in use, heat can enter the heat channel along the heat inlet and be transmitted in the heat channel. Since the blocking portion is arranged at a first angle with the conveying direction of the heat channel to form a heat concentration portion for collecting part of the heat, and part of the heat exchange tubes are connected to the outer wall of the mounting shell and are arranged close to the heat concentration portion, the part of the heat collected in the heat concentration portion will exchange heat with part of the heat exchange tubes arranged on the outer wall of the mounting shell to heat the water in the part of the heat exchange tubes, thereby making full use of the heat conveyed to the heat channel, improving the heat exchange efficiency and heat utilization rate, and avoiding energy waste.

[0008] The technical solution is further described below:

[0009] In one embodiment, the blocking portion is provided with a second heat outlet for heat to pass through, and the second heat outlet is connected to the heat channel. In this way, the heat at the heat concentration portion can also be discharged along the second heat outlet, avoiding the heat from being concentrated in the heat concentration portion and affecting the heat transfer.

[0010] In one of the embodiments, a heat exchange position is provided on the outer wall of the mounting shell, the heat exchange position is arranged close to the heat concentration portion, and part of the heat exchange tubes are in contact with and cooperate with the heat exchange position.

[0011] In one embodiment, the blocking member includes a mounting body and a blocking portion, the mounting body is fixed to the inner wall of the heat channel, the mounting body is provided with a third heat outlet, the third heat outlet is provided in the heat concentration portion so that the heat in the heat concentration portion is transferred to the heat exchange position along the third heat outlet, and the blocking portion and the portion of the mounting body provided with the third heat outlet are arranged at a second angle to gather heat. In this way, the heat gathered in the heat concentration portion can be transferred to the inner wall of the mounting shell through the third heat outlet and then can be exchanged with the heat exchange tube to heat the water in the heat exchange tube, thereby making full use of the heat transported to the heat channel, improving the heat exchange efficiency and heat utilization rate, and avoiding energy waste.

[0012] In one embodiment, the heat exchange structure also includes a heat exchange element, which is arranged in the heat channel; the heat exchange tube includes a first section and a second section connected to the first section, the first section is connected to the outer wall of the mounting shell and is arranged close to the heat concentration part to exchange heat with the heat accumulated in the heat concentration part, and the second section passes through the mounting shell and is inserted into the heat exchange element.

[0013] In one embodiment, the first section is wrapped around the outer wall of the mounting housing.

[0014] On the other hand, the present application also relates to a water heater, comprising the heat exchange structure in any of the above embodiments.

[0015] When the above-mentioned water heater is in use, heat can enter the heat channel along the heat inlet and be transmitted in the heat channel. Since the blocking portion is arranged at a first angle with the conveying direction of the heat channel to form a heat concentrating portion for collecting part of the heat, and part of the heat exchange tubes are connected to the outer wall of the mounting shell and arranged close to the heat concentrating portion, the part of the heat collected in the heat concentrating portion will exchange heat with part of the heat exchange tubes arranged on the outer wall of the mounting shell to heat the water in the part of the heat exchange tubes, thereby making full use of the heat conveyed to the heat channel, improving the heat exchange efficiency and heat utilization rate, and avoiding energy waste.

[0016] In one of the embodiments, the water heater further comprises a water inlet pipe and a water outlet pipe, wherein the water inlet pipe is connected to the water inlet of the heat exchange tube, and the water outlet pipe is connected to the water outlet of the heat exchange tube.

[0017] In one embodiment, the water heater further comprises a burner, and a heat transfer portion of the burner is in communication with the heat inlet.

[0018] In one embodiment, the water heater further comprises a fan, and an air suction portion of the fan is connected to the first heat outlet.

[0019] In one embodiment, the water heater also includes a grille, which is arranged at the first heat outlet, and the grille is provided with a first through hole, a second through hole and a third through hole, all of which are connected to the heat channel, the second through hole is arranged between the first through hole and the third through hole, the area of ​​the second through hole is smaller than the area of ​​the third through hole and the area of ​​the first through hole, the suction part of the fan is provided with an air suction cavity and an air suction port connected to the air suction cavity, the fan is arranged on the grille through the air suction cavity cover, the area of ​​the air suction port is smaller than the sum of the areas of the first through hole, the second through hole and the third through hole, and the air suction port faces the second through hole. In this way, when the air intake port is sucking air, it faces the second through hole. When the area of ​​the second through hole is equal to the area of ​​the third through hole and the area of ​​the first through hole, then under normal circumstances, the air output of the second through hole is greater than the air output of the first through hole and the air output of the third through hole. In this way, the heat near the second through hole will be greater than the heat near the first through hole and the third through hole, resulting in uneven heat exchange in the heat exchange part and low heat exchange efficiency. For this reason, the area of ​​the second through hole is set to be smaller than the area of ​​the third through hole and the area of ​​the first through hole, so that the heat exchange part can be heated evenly and the heat exchange efficiency can be improved.

[0020] In one embodiment, the inner wall of the suction chamber is provided with a first suction zone, a second suction zone and a third suction zone, the second suction zone is arranged between the first suction zone and the third suction zone, the second suction zone is provided with the suction port, the first suction zone faces the first through hole, the suction port faces the second through hole, and the third suction zone faces the third through hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The drawings constituting a part of this application are used to provide a further understanding of the present invention. The schematic embodiments of the present invention and the description thereof are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings used in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0023] In addition, the drawings are not drawn to a 1:1 scale, and the relative sizes of various elements are drawn only as examples in the drawings and are not necessarily drawn according to the true scale.

[0024] Figure 1 is a schematic structural diagram of a water heater in one embodiment;

[0025] Figure 2 is a schematic structural diagram of a water heater in another embodiment;

[0026] Figure 3 for Figure 2 A is a partial enlarged schematic diagram;

[0027] Figure 4 It is a schematic diagram of the structure of the blocking member.

[0028] Description of reference numerals:

[0029] 10. Water heater; 100. Mounting shell; 110. Heat channel; 112. First heat outlet; 114. Heat inlet; 116. Heat exchange position; 200. Heat exchange element; 300. Heat exchange tube; 310. First section; 320. Second section; 400. Blocking element; 410. Blocking part; 412. Second heat outlet; 420. Mounting body; 422. Third heat outlet; 430. Heat concentration part; 500. Water inlet pipe; 600. Water outlet pipe. DETAILED DESCRIPTION

[0030] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0033] Please refer to Figures 1 to 3 The water heater 10 in one embodiment includes a heat exchange structure, which includes a mounting shell 100, a blocking member 400 and a heat exchange tube 300. The mounting shell 100 is provided with a heat channel 110, and the heat channel 110 includes a first heat outlet 112 and a heat inlet 114. The blocking member 400 is fixed to the inner wall of the heat channel 110. The blocking member 400 is provided with a blocking portion 410, and the blocking portion 410 is arranged at a first angle with the conveying direction of the heat channel 110 to form a heat concentration portion 430 for collecting part of the heat; part of the heat exchange tube 300 is connected to the outer wall of the mounting shell 100 and is arranged close to the heat concentration portion 430 to exchange heat with the heat collected in the heat concentration portion 430.

[0034] When the above-mentioned heat exchange structure and heat exchanger are in use, heat can enter the heat channel 110 along the heat inlet 114 and be transmitted in the heat channel 110. Since the blocking portion 410 and the conveying direction of the heat channel 110 are arranged at a first angle to form a heat concentrating portion 430 for collecting part of the heat, and part of the heat exchange tubes 300 are connected to the outer wall of the installation shell 100 and are arranged close to the heat concentrating portion 430, the part of the heat collected in the heat concentrating portion 430 will exchange heat with part of the heat exchange tubes 300 arranged on the outer wall of the installation shell 100 to heat the water in the part of the heat exchange tubes 300, thereby making full use of the heat conveyed to the heat channel 110, improving the heat exchange efficiency and heat utilization rate, and avoiding energy waste.

[0035] For further information, please refer to Figure 1 to Figure 2The water heater 10 further includes a burner, a water inlet pipe 500 and a water outlet pipe 600. The heat exchange structure further includes a heat exchange element 200. The heat exchange element 200 is disposed in the heat channel 110. The heat exchange tube 300 includes a first section 310 and a second section 320 communicating with the first section 310. The water inlet pipe 500 is communicated with the water inlet of the first section 310. The water outlet pipe 600 is communicated with the water outlet of the second section 320. The first section 310 is disposed on the outer wall of the installation shell 100 and is disposed close to the heat concentration portion 430 to exchange heat with the heat accumulated in the heat concentration portion 430. The second section 320 passes through the installation shell 100 and is inserted in Heat exchange element 200; in this way, the heat generated by the combustion of the burner enters the heat channel 110, and the heat gathered in the heat concentration portion 430 will exchange heat with the first section 310 arranged on the outer wall of the mounting shell 100 to heat the water in the first section 310, and then the water will continue to enter the second section 320, and the heat in the heat channel 110 will exchange heat with the heat exchange element 200, and then the heat exchange element 200 will exchange heat with the second section 320 to increase the temperature of the water in the second section 320, thereby making full use of the heat transported to the heat channel 110, thereby improving the heat exchange efficiency and heat utilization rate and avoiding energy waste.

[0036] Please refer to Figure 1 In this embodiment, the heat exchange element 200 is disposed between the heat concentration portion 430 and the first heat outlet 112. In this way, the water that enters the first section 310 and the second section 320 in sequence along the water inlet pipe 500 can be gradually heated, thereby improving the heat exchange efficiency and preventing the temperature of the water from dropping when it is discharged from the water outlet of the second section 320.

[0037] Specifically, the first angle is A1, wherein 45°≤A1≤60°. Optionally, A1 can be 45°, 50°, 55°, or 60°.

[0038] Please refer to Figure 3 The outer wall of the mounting housing 100 is provided with a heat exchange position 116, which is arranged close to the heat concentration part 430, and part of the heat exchange tube 300 is in contact with the heat exchange position 116. Preferably, the heat exchange position 116 is arranged opposite to the heat concentration part 430, so that the heat exchange effect can be improved.

[0039] Please refer to Figure 3 The first section 310 is wound around the heat exchange position 116 , and the second section 320 passes through the mounting shell 100 and is inserted into the heat exchange element 200 .

[0040] Please refer to Figure 3The blocking member 400 includes a mounting body 420 and a blocking portion 410. The mounting body 420 is fixed to the inner wall of the heat channel 110. The mounting body 420 is provided with a third heat outlet 422. The third heat outlet 422 is provided in the heat concentration portion 430 so that the heat in the heat concentration portion 430 is transferred to the heat exchange position 116 along the third heat outlet 422. The blocking portion 410 and the portion of the mounting body 420 provided with the third heat outlet 422 are arranged at a second angle to gather heat. In this way, the heat gathered in the heat concentration portion 430 can be transferred to the inner wall of the mounting shell 100 through the third heat outlet 422 and can then exchange heat with the first section 310 to heat the water in the heat exchange tube 300 provided at the heat exchange position 116, thereby making full use of the heat transported to the heat channel 110, improving the heat exchange efficiency and heat utilization rate, and avoiding energy waste.

[0041] Please refer to Figure 3 Furthermore, the blocking portion 410 is provided with a second heat outlet 412 for heat to pass through, and the second heat outlet 412 is connected to the heat channel 110. In this way, the heat at the heat concentration portion 430 can also be discharged along the second heat outlet 412, avoiding the heat from being concentrated in the heat concentration portion 430 and affecting the heat transfer.

[0042] Please refer to Figure 1 and Figure 3 Since the heat exchange element 200 is arranged between the heat concentration part 430 and the first heat outlet 112, and the second section 320 is inserted into the heat exchange element 200, by opening the second heat outlet 412 in the blocking part 410, it can also avoid that heat is crowded in the heat concentration part 430 and affects the heat exchange effect on the water in the second section 320.

[0043] Further, the blocking portion 410 is close to the third heat outlet 422, and the blocking portion 410 and the portion of the mounting body 420 where the third heat outlet 422 is provided form a second angle. Specifically, the second angle is A2, wherein 45°≤A2≤60°. Optionally, A2 may be 45°, 50°, 55°, or 60°.

[0044] Specifically, the blocking member 400 is a copper plate.

[0045] Please refer to Figure 2 and Figure 4 In one embodiment, the number of heat exchange positions 116, blocking portions 410 and third heat outlets 422 are all multiple, and the heat exchange positions 116, blocking portions 410 and third heat outlets 422 correspond one to one, and the third heat outlets 422 are arranged in an array, and the blocking portions 410 are also arranged in an array. In this way, more heat can be discharged to exchange heat with the first section 310.

[0046] Please continue to refer to Figure 2 and Figure 4 The blocking parts 410 and the third heat outlets 422 are arranged in an array, one heat exchange position 116 corresponds to a row of third heat outlets 422 and a row of blocking parts 410, and the spacing value between two adjacent circles of heat exchange tubes 300 located on the heat exchange position 116 is equal to the spacing value between two adjacent rows of third heat outlets 422.

[0047] Based on any of the above embodiments, the water heater 10 also includes a fan, the air suction part of the fan is connected to the first heat outlet 112, the fan is arranged at the first heat outlet 112, and the burner is arranged at the heat inlet 114. When in use, the fan runs, and under the action of the fan, the high-temperature flue gas enters the heat channel 110 along the heat inlet 114. Part of the heat in the heat channel 110 is exchanged with the heat exchange element 200, and the other part of the heat is discharged along the seventh heat outlet under the blocking effect of the blocking element 400 to exchange heat with the first section 310 pipeline.

[0048] Specifically, the fan may be an exhaust fan.

[0049] Furthermore, in one embodiment, the water heater 10 also includes a grille, which is arranged at the first heat outlet 112. The grille is provided with a first through hole, a second through hole and a third through hole, all of which are connected to the heat channel 110. The second through hole is arranged between the first through hole and the third through hole. In this way, the high-temperature flue gas discharged along the first heat outlet 112 can be discharged along the first through hole, the second through hole and the third through hole.

[0050] Furthermore, the area of ​​the second through hole is smaller than the area of ​​the third through hole and the area of ​​the first through hole. The air suction part of the fan is provided with an air suction cavity and an air suction port connected to the air suction cavity. The fan is provided on the grille through the air suction cavity cover. The area of ​​the air suction port is smaller than the sum of the areas of the first through hole, the second through hole and the third through hole, and the air suction port faces the second through hole. In this way, when the air suction port is sucking air, it faces the second through hole. When the area of ​​the second through hole is equal to the area of ​​the third through hole and the area of ​​the first through hole, then under normal circumstances, the air output of the second through hole is greater than the air output of the first through hole and the air output of the third through hole. In this way, the heat near the second through hole will be greater than the heat near the first through hole and the third through hole, thereby causing uneven heat exchange in the heat exchange part and low heat exchange efficiency. For this reason, the area of ​​the second through hole is set to be smaller than the area of ​​the third through hole and the area of ​​the first through hole, so that the heat exchange part can be heated evenly and the heat exchange efficiency can be improved.

[0051] Optionally, the first through hole, the second through hole and the third through hole can be square holes, round holes or other irregular holes, as long as the area of ​​the second through hole is smaller than the area of ​​the third through hole and the area of ​​the first through hole; in this embodiment, the first through hole, the second through hole and the third through hole are all square holes, and the areas of the first through hole and the third through hole are larger than the area of ​​the second through hole.

[0052] Furthermore, the inner wall of the suction cavity is provided with a first suction area, a second suction area and a third suction area, the second suction area is arranged between the first suction area and the third suction area, the second suction area is provided with a suction port, the first suction area faces the first through hole, the suction port faces the second through hole, and the third suction area faces the third through hole.

[0053] Specifically, in one embodiment, the water heater 10 further includes a connection cover, which is a hollow structure with two openings at both ends, one end of the connection cover is covered on the grille, and the other end of the connection cover extends into the air suction chamber and is connected to the air suction part of the fan, and the air suction port is connected to the first through hole, the second through hole and the third through hole through the connection cover. In this way, under the action of the fan, the airflow discharged along the first through hole, the second through hole and the third through hole flows to the air suction chamber through the connection cover. In addition, the connection cover can also collect high-temperature flue gas, so that the flue gas is concentrated and flows to the fan.

[0054] In one embodiment, the other end of the connecting cover is clamped with the inner wall of the air suction chamber, so as to facilitate the installation between the connecting cover and the fan, and also facilitate the disassembly of the connecting cover and the fan.

[0055] Furthermore, in this embodiment, the outer wall of the connection cover is provided with a card slot, and the inner wall of the smoking chamber is provided with a card protrusion that is engaged with the card slot, so that the connection cover and the fan are installed by the cooperation of the card slot and the card protrusion. In other embodiments, the outer wall of the connection cover is provided with a card protrusion, and the inner wall of the smoking chamber is provided with a card slot that is engaged with the card protrusion.

[0056] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0057] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0058] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0059] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0060] The above embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for those of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A heat exchange structure, characterized in that: include: An installation shell is provided with a heat channel, and the heat channel includes a first heat outlet and a heat inlet; A blocking member, the blocking member is fixedly mounted on the inner wall of the heat channel, the blocking member is provided with a blocking portion, and the blocking portion is arranged at a first angle with the conveying direction of the heat channel to form a heat concentrating portion for collecting part of the heat; and Heat exchange tubes, some of which are connected to the outer wall of the mounting shell and are arranged close to the heat concentration portion to exchange heat with the heat accumulated in the heat concentration portion; The blocking portion is provided with a second heat outlet for heat to pass through, and the second heat outlet is communicated with the heat channel; The outer wall of the installation shell is provided with a heat exchange position, the heat exchange position is arranged close to the heat concentration part, and part of the heat exchange tubes are in contact with the heat exchange position; The blocking member includes a mounting body and the blocking portion, the mounting body is fixedly mounted on the inner wall of the heat channel, the mounting body is provided with a third heat outlet, the third heat outlet is arranged in the heat concentrating portion so that the heat in the heat concentrating portion is transferred to the heat exchange position along the third heat outlet, and the blocking portion is arranged at a second angle with a portion of the mounting body provided with the third heat outlet to gather heat.

2. The heat exchange structure according to any one of claim 1, characterized in that: It also includes a heat exchange component, which is arranged in the heat channel; the heat exchange tube includes a first section and a second section connected to the first section, the first section is connected to the outer wall of the installation shell and is arranged close to the heat concentration part to exchange heat with the heat accumulated in the heat concentration part, and the second section passes through the installation shell and is inserted into the heat exchange component.

3. The heat exchange structure according to claim 2, characterized in that: The first section is wound around the outer wall of the mounting shell.

4. A water heater, characterized in that: The heat exchange structure comprises the heat exchange structure according to any one of claims 1 to 3.

5. The water heater according to claim 4, characterized in that: It also includes a water inlet pipe and a water outlet pipe, wherein the water inlet pipe is communicated with the water inlet of the heat exchange tube, and the water outlet pipe is communicated with the water outlet of the heat exchange tube.

6. The water heater according to claim 4, characterized in that: A burner is also included, and a heat delivery portion of the burner is communicated with the heat inlet.

7. The water heater according to claim 4, characterized in that: It also includes a fan, and the air suction part of the fan is connected to the first heat outlet.

8. The water heater according to claim 7, characterized in that: It also includes a grille, which is arranged at the first heat outlet, and the grille is provided with a first through hole, a second through hole and a third through hole, all of which are connected to the heat channel, the second through hole is arranged between the first through hole and the third through hole, the area of ​​the second through hole is smaller than the area of ​​the third through hole and the area of ​​the first through hole, the air suction part of the fan is provided with an air suction cavity and an air suction port connected to the air suction cavity, the fan is arranged on the grille through the air suction cavity cover, the area of ​​the air suction port is smaller than the sum of the areas of the first through hole, the second through hole and the third through hole, and the air suction port faces the second through hole.

9. The water heater according to claim 8, characterized in that: The inner wall of the suction cavity is provided with a first suction area, a second suction area and a third suction area, the second suction area is arranged between the first suction area and the third suction area, the second suction area is provided with the suction port, the first suction area faces the first through hole, the suction port faces the second through hole, and the third suction area faces the third through hole.

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