Gas water heater

Abstract

The utility model provides a gas water heater which comprises a box body, a fan gas-collecting hood assembly, a combustion box and a mute cover, the fan gas-collecting hood assembly, the combustion box and the mute cover are all arranged in the box body, the box body is provided with an air inlet communicated with the outside, the combustion box is provided with a combustion box air inlet communicated with the air inlet, the mute cover is fixed in the box body, and the fan gas-collecting hood assembly is arranged in the box body. An inner cavity is defined by the mute cover and the back plate of the box body, the fan gas-collecting hood assembly is arranged in the inner cavity, the air inlet is formed in the back plate of the box body and communicated with the inner cavity, and the mute cover is further provided with an air outlet communicated with the inner cavity. The gas water heater further comprises a noise reduction channel, and the noise reduction channel sequentially passes through the combustion box air inlet, the air outlet, the inner cavity and the air inlet. The mute cover covers the outer side of the fan gas-collecting hood assembly, so that noise transmitted to the outside by the gas water heater can be reduced, and the user experience is improved.

Description

Technical Field

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

[0002] For gas water heaters, the top-extraction type on the market can be divided into two main categories based on whether they are quiet or not: one is a product that meets the national first-level quietness standard, and the other is a regular gas water heater. Currently, most quiet gas water heaters use noise reduction treatment at the air inlet of the gas water heater to achieve a noise reduction effect. The disadvantages of this method are high manufacturing cost, complex assembly, and difficulty in guaranteeing consistent results. Often, the actual performance of the machine purchased by the user does not reach the laboratory effect, resulting in greater noise and a poor user experience. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the defect of poor user experience caused by the high noise of gas water heaters in the prior art, and to provide a gas water heater.

[0004] The present invention solves the above-mentioned technical problems through the following technical solution:

[0005] A gas water heater includes a housing, a fan hood assembly, and a combustion box. The fan hood assembly and the combustion box are disposed in the housing. The housing has an air inlet communicating with the outside, and the combustion box has a combustion box air inlet communicating with the air inlet.

[0006] The gas water heater also includes a soundproof cover, which is fixed inside the housing. The soundproof cover and the back panel of the housing form an inner cavity. The fan gas collection cover assembly is disposed in the inner cavity. The air inlet is disposed on the back panel of the housing and communicates with the inner cavity. The soundproof cover is provided with an air outlet that communicates with the inner cavity.

[0007] The gas water heater also includes a noise reduction path, which passes sequentially through the combustion box air inlet, the air outlet, the inner cavity, and the air inlet.

[0008] In this technical solution, by installing a soundproof cover on the outside of the fan gas collection hood assembly, the noise transmitted from the gas water heater to the outside can be reduced, thus improving the user experience.

[0009] Specifically, the noise from a gas water heater is mainly transmitted to the outside of the gas water heater through the air intake channel entering the combustion chamber in the opposite direction. The noise reduction principle of a gas water heater is as follows: Regarding the noise generated by the fan hood assembly, on the one hand, the soundproof cover placed outside the fan hood assembly can block the fan noise generated by the fan hood assembly. After being blocked by the soundproof cover, part of the fan noise generated by the fan hood assembly can be dissipated, that is, noise reduction is achieved through physical blocking. On the other hand, for the fan noise that still remains after being blocked by the soundproof cover, as it is transmitted to the outside of the housing through the air intake in the noise reduction path, the fan noise is further reduced by extending the noise propagation path.

[0010] Meanwhile, the combustion noise generated inside the combustion chamber needs to enter the inner cavity of the soundproof enclosure through the combustion chamber's air inlet and outlet in the noise reduction path. After being blocked by the soundproof enclosure, a portion of the noise is dissipated, which means that the combustion noise is reduced through physical blocking. The remaining portion of the combustion noise that remains after being blocked in the soundproof enclosure needs to be transmitted to the outside of the soundproof enclosure through the air inlet in the noise reduction path, and then to the outside of the enclosure through the enclosure's air inlet. In this process, the transmission path of the combustion noise is the entire noise reduction path, and the combustion noise is further reduced by extending the noise propagation path.

[0011] The air inlet, inner cavity, air outlet, and combustion box air inlet are sequentially connected to form the air intake channel of the combustion box. In other words, the opposite direction of the noise reduction path is the air intake channel of the combustion box. Air flows into the combustion box through the opposite direction of this noise reduction path, thus preventing the soundproof cover from affecting the combustion effect of the gas inside the burner box.

[0012] Preferably, there is a first flow gap between the soundproof cover and the housing, and the first flow gap connects the air outlet and the air inlet of the combustion box.

[0013] In this technical solution, by setting a first flow gap between the soundproof cover and the housing to connect the air outlet and the air inlet of the combustion box, there is no need to set up additional components such as pipes, making the structure of the gas water heater simpler.

[0014] Preferably, the soundproof enclosure includes a front panel, which is disposed opposite to the back panel of the enclosure. The air outlet is disposed on the front panel of the soundproof enclosure, and the first flow gap is formed between the outer surface of the front panel of the soundproof enclosure and the inner surface of the panel of the enclosure.

[0015] This technical solution provides a specific structural design that allows air to enter the combustion chamber through an air inlet, inner cavity, air outlet, flow gap, and combustion chamber air inlet. By leaving a flow gap between the front panel of the soundproof cover and the panel of the housing, air enters the housing from the air inlet, flows through the air outlet to the flow gap, and then flows into the combustion chamber. Combustion noise enters the inner cavity through the combustion chamber air inlet, the first flow gap, and the air outlet, where it is blocked and reduced by the soundproof cover.

[0016] Preferably, the air inlet of the combustion box is located at the bottom of the combustion box, and the bottom of the front side panel of the noise-reducing cover is bent to form a first bent portion of the front side panel, and the lower surface of the first bent portion of the front side panel abuts against the upper surface of the combustion box.

[0017] In this technical solution, by setting the first bend in the front side plate, the amount of air escaping during the process of flowing from the flow gap into the combustion chamber can be reduced, allowing more air to quickly reach the combustion chamber through the air intake channel, thereby improving combustion efficiency.

[0018] Preferably, there is a second flow gap between the front side panel of the combustion box and the panel of the housing, and the first flow gap is connected to the air inlet of the combustion box through the second flow gap.

[0019] In this technical solution, by setting a second flow gap between the burner panel and the housing panel to connect the first flow gap and the air inlet of the combustion box, and by placing both the first and second flow gaps near the front of the housing, airflow is more facilitated.

[0020] Preferably, the soundproof enclosure further includes a side panel, which is connected to the front side panel of the soundproof enclosure and the back panel of the housing. The side panel is bent upward along the height direction to form a first bent portion of the side panel, and the inner surface of the first bent portion of the side panel abuts against the top of the fan air collection hood assembly.

[0021] Preferably, the side panel is bent at the rear side near the back panel of the housing to form a second bent portion of the side panel, and the outer surface of the second bent portion of the side panel abuts against the back panel of the housing.

[0022] Preferably, the front side of the first bend of the side panel is bent to form the third bend of the side panel, and the front side panel of the soundproof cover is bent upward along the height direction to form the second bend of the front side panel. The outer surface of the third bend of the side panel abuts against the inner surface of the second bend of the front side panel.

[0023] Preferably, along the air flow direction, an air inlet guide plate is provided on the inner side of the air inlet. Along the height direction, one end of the air inlet guide plate is connected to the back plate of the housing and located below the air inlet, while the other end is bent upward to a point higher than the lowest point of the air inlet, and there is a gap between it and the back plate of the housing.

[0024] Preferably, along the direction of air flow, an air outlet guide plate is provided on the outer side of the air outlet. Along the height direction, one end of the air outlet guide plate is connected to the front side panel of the soundproof cover and is located above the air outlet, while the other end is bent downward to below the highest point of the air outlet and has a gap with the front side panel of the soundproof cover.

[0025] Preferably, along the height direction, the highest point of the air inlet guide plate is set at a lower height than the highest point of the air inlet.

[0026] Preferably, along the height direction, the lowest point of the air outlet guide plate is set at a higher height than the lowest point of the air outlet.

[0027] Preferably, the fan gas collection hood assembly includes a gas collection hood, the soundproof hood has a soundproof hood connection hole, the fan gas collection hood has a gas collection hood connection hole, the positions of the soundproof hood connection hole and the gas collection hood connection hole correspond to each other, the gas water heater includes fasteners, the fasteners are inserted into the soundproof hood connection hole and the gas collection hood connection hole to connect the soundproof hood and the gas collection hood.

[0028] Preferably, the soundproof cover is integrally formed.

[0029] In this technical solution, by setting the side panels of the soundproof enclosure, excluding the back panel, as a whole and then fixing them to the enclosure with fasteners, a good noise reduction effect can be achieved without the need for additional sealing gaskets, etc., making installation more convenient and the structure more reliable.

[0030] The positive and progressive effects of this utility model are as follows: by covering the outside of the fan gas collection hood assembly with a soundproof cover, the noise transmitted from the gas water heater to the outside can be reduced, thus improving the user experience. Attached Figure Description

[0031] Figure 1A This is a partial structural diagram (I) of a gas water heater according to an embodiment of the present invention.

[0032] Figure 1B This is a schematic diagram of the noise reduction path according to an embodiment of the present invention.

[0033] Figure 1C This is a schematic diagram of the air inlet channel according to an embodiment of the present invention.

[0034] Figure 2 This is a partial structural diagram (II) of a gas water heater according to an embodiment of the present invention.

[0035] Figure 3 This is a partial structural diagram (III) of a gas water heater according to an embodiment of the present invention.

[0036] Figure 4 This is a partial structural diagram (four) of a gas water heater according to an embodiment of the present invention.

[0037] Figure 5 This is a partial structural diagram (V) of a gas water heater according to an embodiment of the present invention.

[0038] Figure 6 This is a partial structural diagram (VI) of a gas water heater according to an embodiment of the present invention.

[0039] Figure 7 This is a schematic diagram (I) of the structure of the noise-reducing cover and fan air collection cover assembly according to an embodiment of the present invention.

[0040] Figure 8 This is a schematic diagram (II) of the structure of the noise-reducing cover and fan air collection cover assembly according to an embodiment of the present invention.

[0041] Figure 9 This is a schematic diagram (III) of the structure of the noise-reducing cover and fan air collection cover assembly according to an embodiment of the present invention.

[0042] Figure 10 This is a schematic diagram of the structure of a soundproof cover according to an embodiment of the present invention (I).

[0043] Figure 11 This is a schematic diagram (II) of the structure of a soundproof cover according to an embodiment of the present invention.

[0044] Figure 12 This is a schematic diagram (I) of the structure of a fan air collection hood assembly according to an embodiment of the present invention.

[0045] Figure 13 This is a schematic diagram (II) of the structure of a fan air collection hood assembly according to an embodiment of the present invention.

[0046] Figure 14 This is a schematic diagram (III) of the structure of a fan gas collection hood assembly according to an embodiment of the present invention.

[0047] Explanation of reference numerals in the attached figures:

[0048] Backplate 1

[0049] Air Inlet 101

[0050] Air inlet guide plate 12

[0051] Fan air collection hood assembly 2

[0052] Fan 21

[0053] Gas collection hood 22

[0054] Combustion Box 3

[0055] Combustion box air inlet 301

[0056] Front side panel 31 of the combustion box

[0057] Silent enclosure 4

[0058] Inner cavity 401

[0059] Front panel 41 of the soundproof enclosure

[0060] 411 First bend of the front side panel

[0061] 412, second bend of front side panel

[0062] Side panel 42

[0063] 421 First bend of side panel

[0064] 422, second bend of side panel

[0065] 423 Third bend of side panel

[0066] Air vent 402

[0067] Air outlet guide plate 43 Detailed Implementation

[0068] The present invention will be described more clearly and completely below with reference to the accompanying drawings, using a preferred embodiment.

[0069] like Figures 1A-14 As shown, this embodiment provides a gas water heater, which includes a housing, a fan hood assembly 2, a combustion chamber 3, and a soundproof enclosure 4. The fan hood assembly 2, the combustion chamber 3, and the soundproof enclosure 4 are all housed within the housing. As shown... Figures 1A-6As shown, the soundproof cover 4 is fixed inside the housing. The housing has an air inlet 101 that communicates with the outside. The air inlet 101 is located on the back plate 1 of the housing. The soundproof cover 4 and the back plate 1 of the housing form an inner cavity 401. The fan gas collection hood assembly 2 is located in the inner cavity 401. The air inlet 101 communicates with the inner cavity 401. The soundproof cover 4 also has an air outlet 402 that communicates with the inner cavity 401. The combustion box 3 has a combustion box air inlet 301 that communicates with the air inlet 101. The combustion box air inlet 301 communicates with the air inlet 101 through the air outlet 402 and the inner cavity 401. The gas water heater also includes a noise reduction path, which passes through the combustion box air inlet 301, the air outlet 402, the inner cavity 401, and the air inlet 101 in sequence. By covering the outside of the fan gas collection hood assembly 2 with the soundproof cover 4, the noise transmitted from the gas water heater to the outside can be reduced, improving the user experience.

[0070] Specifically, the noise of the gas water heater is mainly transmitted to the outside of the gas water heater through the air inlet channel entering the combustion box 3 in the opposite direction. The noise reduction principle of the gas water heater is as follows: Regarding the noise generated by the fan gas collection hood assembly 2, on the one hand, the soundproof cover 4 is placed on the outside of the fan gas collection hood assembly 2, which can block the fan noise generated by the fan gas collection hood assembly 2. After the fan noise generated by the fan gas collection hood assembly 2 is blocked by the soundproof cover 4, a part of it can be dissipated, that is, noise reduction is achieved through physical blocking. On the other hand, for the part of fan noise that still exists after being blocked by the soundproof cover 4, the fan noise is further reduced by extending the noise propagation path during the process of being transmitted to the outside of the box through the air inlet 101 in the noise reduction path.

[0071] Meanwhile, the combustion noise generated inside the combustion box 3 needs to enter the inner cavity 401 of the soundproof cover 4 through the combustion box air inlet 301 and air outlet 402 in the noise reduction path. After being blocked by the soundproof cover 4 in the inner cavity 401, part of the combustion noise is dissipated. In other words, the combustion noise is reduced by physical blocking. The part of the combustion noise that still exists after being transmitted to the soundproof cover 4 and blocked needs to be transmitted to the outside of the soundproof cover 4 through the air inlet 101 in the noise reduction path, and then to the outside of the box through the box air inlet 101. In this process, the transmission path of the combustion noise is the entire noise reduction path. The combustion noise is further reduced by extending the propagation path of the noise.

[0072] The air inlet 101, inner cavity 401, air outlet 402 and combustion box air inlet 301 are connected in sequence to form the air inlet channel of combustion box 3. In other words, the opposite direction of the noise reduction path is the air inlet channel of combustion box 3. Air flows into combustion box 3 through the opposite direction of the noise reduction path, so as to avoid the setting of the soundproof cover 4 from affecting the combustion effect of gas in the burner box.

[0073] like Figure 1B and Figure 1C As shown, Figure 1B The direction indicated by the middle arrow is the direction of the noise reduction path. The direction in which the fan noise of the fan hood assembly 2 is transmitted to the outside through the noise reduction path is the same as the propagation path of the combustion noise, starting from the inner cavity 401. Figure 1C The direction indicated by the middle arrow is the direction of the air intake channel.

[0074] In this embodiment, a first flow gap (not shown in the figure) is provided between the soundproof cover 4 and the housing, and the first flow gap connects the air outlet 402 and the combustion chamber air inlet 301. By providing a first flow gap between the soundproof cover 4 and the housing to connect the air outlet 402 and the combustion chamber air inlet 301, no additional components such as pipes are required, making the structure of the gas water heater simpler.

[0075] Specifically, the soundproof enclosure 4 includes a front panel 41, which is positioned opposite to the back panel 1 of the housing. An air outlet 402 is located on the front panel 41, and a first flow gap is formed between the outer surface of the front panel 41 and the inner surface of the housing panel (not shown in the figure). In other words, there is a gap between the outer surface of the front panel 41 and the housing panel; they do not abut against each other. By creating this flow gap between the front panel 41 and the housing panel, air enters the housing from the air inlet 101 and flows through the air outlet 402 into the flow gap, thus flowing into the combustion chamber 3. Combustion noise enters the inner cavity 401 through the combustion chamber air inlet 301, the first flow gap, and the air outlet 402, where it is blocked and reduced by the soundproof enclosure 4, improving the noise reduction effect of the gas water heater.

[0076] In this embodiment, the combustion box 3 is located below the fan air collection hood assembly 2 and the noise muffler 4. The combustion box air inlet 301 is located at the bottom of the combustion box 3. Corresponding to the first flow gap, there is a second flow gap (not shown in the figure) between the front side plate 31 of the combustion box and the panel of the housing. The first flow gap communicates with the combustion box air inlet 301 through the second flow gap. That is, there is a gap between the outer surface of the front side plate 31 of the combustion box and the panel of the housing, and the outer surface of the front side plate 31 of the combustion box and the panel of the housing do not abut against each other. By providing a second flow gap between the burner panel and the housing panel that connects the first flow gap and the combustion box air inlet 301, and by having both the first and second flow gaps located near the front of the housing, airflow is more facilitated.

[0077] Of course, in other embodiments, the air outlet 402 of the soundproof cover 4 and the air outlet 402 of the combustion box 3 can also be connected by setting up a pipeline, which will not be described in detail here.

[0078] In this embodiment, as Figures 7-11 As shown, in addition to the front side panel 42, the soundproof cover 4 also includes two side panels 42. Each side panel 42 is connected to the front side panel 41 and the back panel 1 of the soundproof cover, so that the back panel 1 and the soundproof cover 4 of the enclosure form an inner cavity 401. In this configuration, along the height direction, the bottom of the front side panel 41 of the soundproof enclosure is bent to form a first bent portion 411, and the lower surface of the first bent portion 411 abuts against the upper surface of the combustion chamber 3; the upper side of the side panel 42 is bent to form a first bent portion 421, and the inner surface of the first bent portion 421 abuts against the top of the fan hood assembly 2; the rear side of the side panel 42 near the back panel 1 of the housing is bent to form a second bent portion 422, and the outer surface of the second bent portion 422 abuts against the back panel 1 of the housing; the front side of the first bent portion 421 is bent to form a third bent portion 423, and the front side panel 41 of the soundproof enclosure is bent along the height direction to form a second bent portion 412, and the outer surface of the third bent portion 423 abuts against the inner surface of the second bent portion 412. By setting multiple bends on the soundproof cover 4, the soundproof cover 4 fits more closely with the fan air collection cover assembly 2, the soundproof cover 4 with the combustion box 3, and the soundproof cover 4 with the housing. This reduces the amount of air escaping during the flow from the gap into the combustion box 3, allowing more air to quickly reach the combustion box 3 through the air intake channel, thus improving combustion efficiency.

[0079] Meanwhile, in this embodiment, the soundproof enclosure 4 is integrally molded. By making the soundproof enclosure 4 a single unit and fixing it to the enclosure with fasteners, a good noise reduction effect can be achieved without the need for additional sealing gaskets, making installation more convenient and structural reliability higher.

[0080] In this embodiment, along the direction of air flow, such as Figures 1C-5 As shown, an air inlet guide plate 12 is provided on the inner side of the air inlet 101. Along the height direction, one end of the air inlet guide plate 12 is connected to the back panel 1 of the housing and located below the air inlet 101, while the other end bends upwards to a point higher than the lowest point of the air inlet 101, with a gap between it and the back panel 1 of the housing. An air outlet guide plate 43 is provided on the outer side of the air outlet 402. Along the height direction, one end of the air outlet guide plate 43 is connected to the front panel 41 of the soundproof enclosure and located above the air outlet 402, while the other end bends downwards to a point lower than the highest point of the air outlet 402, with a gap between it and the front panel 41 of the soundproof enclosure. By providing the air inlet guide plate 12 and the air outlet guide plate 43, noise transmission is further blocked by the air inlet guide plate 12 and the air outlet guide plate 43, and the noise reduction path is also extended, thereby further reducing the noise emitted by the gas water heater.

[0081] In this embodiment, the higher the highest point of the air inlet guide plate 12 is set and the lower the lowest point of the air outlet guide plate 43 is set along the height direction, the longer the noise reduction path and the better the noise reduction effect. However, the air intake channel is also longer, and the air intake efficiency is lower. Specifically, in this embodiment, the highest point of the air inlet guide plate 12 is set lower than the highest point of the air inlet 101, and the lowest point of the air outlet guide plate 43 is set higher than the lowest point of the air outlet 402 along the height direction. This achieves a good balance between extending the noise propagation path and facilitating airflow into the combustion box 3.

[0082] like Figure 1C As shown in the figure, the direction indicated by the arrow is the propagation path of combustion noise to the outside through the noise reduction path. The direction of the fan noise of the fan hood assembly 2 to the outside through the noise reduction path is the same as the propagation path of combustion noise, starting from the inner cavity 401.

[0083] Of course, in other embodiments, the air inlet guide plate 12 and the air outlet guide plate 43 may not be provided, or the highest point of the air inlet guide plate 12 may be set to be higher than or level with the air inlet 101, and the lowest point of the air outlet guide plate 43 may be set to be lower than or level with the lowest point of the air outlet 402. These details will not be elaborated here.

[0084] In this embodiment, as Figures 5-14 As shown, the fan and gas collection hood assembly 2 includes a fan 21 and a gas collection hood 22. The soundproof cover 4 has a connection hole, and the fan and gas collection hood assembly also has a connection hole for the gas collection hood 22 (not shown in the figure). The connection holes for the soundproof cover 4 and the gas collection hood 22 are positioned correspondingly. The gas water heater includes fasteners (not shown in the figure) that pass through the connection holes for the soundproof cover 4 and the gas collection hood 22 to connect them. Specifically, in this embodiment, the fasteners are screws.

[0085] Meanwhile, the soundproof cover 4 is also directly fixed to the back panel 1 of the enclosure via connectors, thereby improving the reliability of the connection of the soundproof cover 4.

[0086] While specific embodiments of this utility model have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of this utility model is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of this utility model, but all such changes and modifications fall within the scope of protection of this utility model.

Claims

1. A gas water heater comprising a cabinet, a fan cover assembly and a combustion box, the fan cover assembly and the combustion box being arranged in the cabinet, the cabinet having an air inlet communicating with the outside, the combustion box having a combustion box air inlet communicating with the air inlet, characterized in that: the gas water heater further comprises a silencer cover, the silencer cover being fixed in the cabinet, the silencer cover and a back panel of the cabinet surrounding an inner cavity, the fan cover assembly being arranged in the inner cavity, the air inlet being arranged on the back panel of the cabinet, the air inlet communicating with the inner cavity, the silencer cover being provided with an air outlet communicating with the inner cavity; the gas water heater further comprises a noise reduction path, the noise reduction path sequentially passing through the combustion box air inlet, the air outlet, the inner cavity and the air inlet. The first flow gap is formed between the silencer cover and the cabinet, and the first flow gap communicates the air outlet and the combustion box air inlet. The silencer cover comprises a front side plate of the silencer cover, the front side plate of the silencer cover being arranged opposite to the back panel of the cabinet, the air outlet being arranged on the front side plate of the silencer cover, and the first flow gap being formed between the outer side surface of the front side plate of the silencer cover and the inner side surface of the panel of the cabinet.

2. The gas water heater of claim 1, wherein, The combustion box air inlet is arranged at the bottom of the combustion box, the bottom of the front side plate of the silencer cover is bent to form a first bending portion of the front side plate, and the lower surface of the first bending portion of the front side plate abuts against the upper surface of the combustion box.

3. The gas water heater of claim 2, wherein the gas burner is positioned in the combustion chamber such that the flame is directed toward the heat exchanger. The second flow gap is formed between the front side plate of the combustion box and the panel of the cabinet, and the first flow gap communicates with the combustion box air inlet through the second flow gap.

4. The gas water heater of claim 3, wherein the gas burner is positioned in the combustion chamber such that the flame is directed toward the heat exchanger. The silencer cover further comprises a side plate connected to the front side plate of the silencer cover and the back panel of the cabinet, the upper side of the side plate in the height direction is bent to form a first bending portion of the side plate, and the inner surface of the first bending portion of the side plate abuts against the top of the fan cover assembly.

5. The gas water heater of claim 4, wherein the gas burner is positioned in the combustion chamber such that the flame is directed toward the heat exchanger. The rear side of the side plate close to the back panel of the cabinet is bent to form a second bending portion of the side plate, and the outer surface of the second bending portion of the side plate abuts against the back panel of the cabinet.

6. The gas water heater according to any one of claims 1 to 5, wherein the gas burner is arranged to be ignited by the pilot burner. The front side of the first bending portion of the side plate is bent to form a third bending portion of the side plate, the upper side of the front side plate of the silencer cover in the height direction is bent to form a second bending portion of the front side plate, and the outer surface of the third bending portion of the side plate abuts against the inner surface of the second bending portion of the front side plate. In the flow direction of air, the inner side of the air inlet is provided with an air inlet guide plate, one end of the air inlet guide plate is connected to the back panel of the cabinet and located below the air inlet in the height direction, the other end is bent upward to be higher than the lowest point of the air inlet, and there is a gap between the back panel of the cabinet.

7. A gas water heater as claimed in claim 6 wherein, In the flow direction of air, the outer side of the air outlet is provided with an air outlet guide plate, one end of the air outlet guide plate is connected to the front side plate of the silencer cover and located above the air outlet in the height direction, the other end is bent downward to be lower than the highest point of the air outlet, and there is a gap between the front side plate of the silencer cover.

8. The gas water heater of claim 1, wherein, ​ ​ 9. A gas water heater as claimed in claim 8 wherein, In the height direction, the highest part of the air inlet baffle is arranged at a height lower than the highest part of the air inlet; In the height direction, the lowest part of the air outlet baffle is arranged at a height higher than the lowest part of the air outlet.

10. The gas water heater of claim 1, wherein, The fan air collecting cover assembly comprises an air collecting cover, the soundproof cover is provided with a soundproof cover connecting hole, the fan air collecting cover is provided with an air collecting cover connecting hole, the positions of the soundproof cover connecting hole and the air collecting cover connecting hole correspond to each other, the gas water heater comprises a fastener, the fastener is arranged to pass through the soundproof cover connecting hole and the air collecting cover connecting hole to connect the soundproof cover and the air collecting cover. In addition, the soundproof cover is integrally formed.

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