Water heater and back shell assembly thereof

Abstract

The utility model relates to a water heater and a back shell assembly thereof. The back shell assembly comprises a back shell. The side portion of the back shell protrudes outwards to form an air inlet portion, and one or more air inlet holes are formed in the air inlet portion. The air inlet holes are obliquely arranged so that the air inlet directions of the air inlet holes can extend in the direction away from the center L of the back shell. When a fan, a combustor and other noise sources generate noise, a part of noise can be spread outwards through the air inlet part, and due to the fact that the air inlet hole obliquely extends in the air inlet direction f of the air inlet hole in the direction deviating from the center of the back shell, the air inlet hole cannot directly face the fan, the combustor and other noise sources. Therefore, the noise can be prevented from being directly transmitted to the outside of the shell through the air inlet hole. Therefore, the effect of effectively reducing noise can be achieved.

Description

Technical Field

[0001] The present application relates to the technical field of kitchen appliances, and in particular to a water heater and a back shell assembly thereof. Background Art

[0002] As living standards gradually improve, the performance of water heaters has gradually improved. The working noise of water heaters, as one of the important indicators to measure the performance of water heaters, has been widely concerned by major manufacturers and users. In related technologies, the noise of water heaters mainly comes from the vibrations generated by internal components when they are working. The vibration is transmitted in two main ways: one is through the air in the air inlet channel, and the other is that the components drive the shell to vibrate, causing the air near the machine to vibrate and then propagate to the outside of the water heater. Among them, the noise on the left side, right side and front side of the water heater can be directly felt by the user when it is working, and the back of the water heater is generally installed on the wall, so the noise on the back is often ignored. However, after testing, it is known that the noise reflected from the back increases the noise value of the front and two sides by more than 10%, which causes the water heater to produce a larger noise when it is working. Summary of the invention

[0003] The first technical problem solved by the present application is to provide a back shell assembly of a water heater, which can effectively reduce noise.

[0004] The second technical problem solved by the present application is to provide a water heater which can effectively reduce noise.

[0005] The first technical problem mentioned above is solved by the following technical solution:

[0006] A back shell assembly of a water heater, the back shell assembly of the water heater comprising:

[0007] The back shell has a side portion protruding outward to form an air inlet portion, and the air inlet portion is formed with one or more air inlet holes; the air inlet holes are inclined so that the air inlet direction extends in a direction away from the center L of the back shell.

[0008] The back shell assembly of the water heater described in this application has the following beneficial effects compared with the background technology:

[0009] When noise sources such as fans and burners generate noise, part of the noise will propagate outward through the air inlet. Since the air inlet is tilted and extended in the direction away from the center L of the back shell along the air inlet direction f of the air inlet, that is, it will not face the noise sources such as fans and burners, on the one hand, it can prevent the noise from being directly transmitted to the outside of the shell through the air inlet, and on the other hand, the air intake resistance will not increase too much. There are two paths for noise to be transmitted to the outside of the shell through the air inlet. One is diffraction, and the energy of the sound wave will be attenuated after diffraction. The other is that the sound wave will be constantly reflected in the shell. When the reflection angle is appropriate, the sound wave will be transmitted to the outside of the shell through the air inlet. In this way, the noise can be effectively reduced.

[0010] In one embodiment, the air inlet portion is disposed on two opposite sides of the back shell.

[0011] In one of the embodiments, the air inlet portion extends from the bottom end of the back shell to the top end of the back shell; all the air inlet holes are arranged on the air inlet portion in sequence and at intervals in the direction from the bottom end of the back shell to the top end of the back shell.

[0012] In one embodiment, the back shell also includes a main body connected to the air inlet portion; the air inlet portion includes a first wall panel and a second wall panel connected to the first wall panel; the first wall panel is respectively arranged at an obtuse angle to the second wall panel and the main body, the first wall panel is connected to the main body at a side away from the second wall panel, and the air inlet hole is formed on the first wall panel.

[0013] In one embodiment, the back shell assembly of the water heater also includes a sound absorbing component connected to the inner wall surface of the air inlet portion; the sound absorbing component includes a first sound absorbing portion and a second sound absorbing portion connected to the first sound absorbing portion, the first sound absorbing portion is connected to the inner wall surface of the second wall panel, and the second sound absorbing portion is closely connected to the inner wall surface of the side shell and is arranged opposite to the air inlet hole.

[0014] In one of the embodiments, the back shell assembly of the water heater further includes at least one damping shock absorber, which is disposed on the outer wall surface of the back shell and is used to abut and fix against the wall.

[0015] In one of the embodiments, the damping shock absorbing component is arranged corresponding to the component installation position on the back shell.

[0016] In one embodiment, the damping shock absorbing component is provided with a avoidance portion capable of avoiding the fastener at the installation position of the part, and the avoidance portion is configured as a groove, a through hole or a notch; and / or, the damping shock absorbing component is configured as a shock absorbing pad, a shock absorbing block or a shock absorbing column.

[0017] In one embodiment, the back shell assembly of the water heater also includes two sealing strips, which are respectively arranged on two side portions of the outer wall of the back shell, and the sealing strips extend from the top end of the back shell to the bottom end of the back shell, and are used to tightly abut against the wall; the air inlet is located between the two sealing strips.

[0018] The above second technical problem is solved by the following technical solution:

[0019] A water heater comprises a back shell assembly of the water heater.

[0020] The back shell assembly of the water heater described in this application has the following beneficial effects compared with the background technology:

[0021] For the above-mentioned water heater, when noise sources such as fans and burners generate noise, part of the noise will propagate outward through the air inlet. Since the air inlet is tilted and extended in the direction away from the center L of the back shell along the air inlet direction f of the air inlet, that is, it will not face the noise sources such as fans and burners, on the one hand, it can prevent the noise from being directly transmitted to the outside of the shell through the air inlet, and on the other hand, the air intake resistance will not increase too much. There are two paths for noise to be transmitted to the outside of the shell through the air inlet. One is diffraction, and the energy of the sound wave will be attenuated after diffraction. The other is that the sound wave will be constantly reflected in the shell. When the reflection angle is appropriate, the sound wave will be transmitted to the outside of the shell through the air inlet. In this way, the noise can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of the present application are used to provide a further understanding of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application.

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] FIG. 1 is a structural diagram of a back shell assembly of a water heater according to an embodiment of the present application.

[0025] FIG. 2 is a structural diagram of a shell of a water heater according to an embodiment of the present application.

[0026] FIG. 3 is a cross-sectional view of a shell of a water heater according to an embodiment of the present application.

[0027] FIG. 4 is an enlarged schematic diagram of FIG. 3 at the intake state at position A. FIG.

[0028] FIG. 5 is an enlarged schematic diagram of FIG. 3 when the noise is transmitted outward at point A. FIG.

[0029] Reference numerals:

[0030] 10. back shell; 11. air inlet; 1101. air inlet hole; 111. first wall panel; 112. second wall panel; 12. main body; 20. sound absorbing member; 21. first sound absorbing member; 22. second sound absorbing member; 30. damping and shock absorbing member; 31. avoidance member; 40. sealing strip; 50. bracket; 60. front shell; 70. side shell; 80. top shell; 90. bottom shell. DETAILED DESCRIPTION

[0031] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application 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 application. However, the present application 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 application, so the present application is not limited by the specific embodiments disclosed below.

[0032] Referring to FIG. 1 and FIG. 3 to FIG. 5, FIG. 1 shows a structural diagram of a back shell assembly of a water heater according to an embodiment of the present application. FIG. 3 shows a cross-sectional view of a shell of a water heater according to an embodiment of the present application. FIG. 4 shows an enlarged schematic diagram of FIG. 3 at the air intake state at A. FIG. 5 shows an enlarged schematic diagram of FIG. 3 at the noise transmission outward at A. A back shell assembly of a water heater provided in an embodiment of the present application includes a back shell 10. The side of the back shell 10 protrudes outward to form an air inlet 11. In addition, the back shell 10 also includes a main body 12 connected to the air inlet 11. One or more air inlet holes 1101 are formed on the air inlet 11. The air inlet 1101 is tilted so that its air intake direction extends in a direction away from the center L of the back shell 10. That is, along the air intake direction f of the air inlet 1101, the air inlet 1101 is tilted and extended in a direction away from the center L of the back shell 10. Specifically, the wall surface of the main body 12 of the back shell 10 includes but is not limited to being set as a plane or other irregular surface. When the wall surface of the main body 12 is set to be a plane, the air intake direction f of the air intake hole 1101 is set at an acute angle with the wall surface of the main body 12 .

[0033] It should be noted that the “outward” in the outward protrusion in this embodiment refers to one side of the outer wall surface of the back shell 10 , that is, the side of the wall surface of the back shell 10 that is away from the internal environment of the shell.

[0034] The cross-sectional profile of the air inlet 1101 along the air inlet direction includes, but is not limited to, a circle, an ellipse, a waist shape, a polygon, etc., which can be flexibly adjusted and set according to actual needs. In addition, the specific number and specific size of the air inlet 1101 can be flexibly adjusted and set according to the actual needs of the target model, and are not limited here.

[0035] When noise sources such as fans and burners generate noise, part of the noise will propagate outward through the air inlet 11. Since the air inlet 1101 is arranged to extend obliquely in the direction away from the center L of the back shell 10 along the air inlet direction f of the air inlet 1101, that is, it will not face the noise sources such as fans and burners, on the one hand, it can prevent the noise from being directly transmitted to the outside of the shell through the air inlet 1101, and on the other hand, the air inlet resistance will not increase too much. There are two paths for noise to be transmitted to the outside of the shell through the air inlet 1101. One is diffraction, and the energy of the sound wave will be attenuated after diffraction. The other is that the sound wave will be constantly reflected in the shell. When the reflection angle is appropriate, the sound wave will be transmitted to the outside of the shell through the air inlet 1101. In this way, the noise can be effectively reduced.

[0036] In some embodiments, the back shell 10 may be provided with an air inlet 11 on one side, or may be provided with air inlets 11 on two opposite sides. When the air inlets 11 are provided on two opposite sides of the back shell 10, compared with providing the air inlet 11 on one side of the back shell 10, the number of air inlet holes 1101 can be increased, thereby effectively increasing the air volume of the air intake, so that the air volume of the air intake meets the functional requirements of the water heater.

[0037] In some embodiments, the number of air inlets 11 on the same side of the back shell 10 can be one or more, which can be adjusted and set according to actual needs. In this embodiment, please refer to FIG. 1 , in order to be processed by sheet metal processing, the number of air inlets 11 on the same side of the back shell 10 is one, and specifically, for example, extends from the top end of the back shell 10 to the bottom end of the back shell 10.

[0038] Please refer to FIG. 1 . In one embodiment, all the air inlet holes 1101 are sequentially arranged on the air inlet portion 11 at intervals in a direction from the bottom end of the rear shell 10 to the top end of the rear shell 10 .

[0039] Please refer to FIG. 1 , FIG. 4 and FIG. 5 . In one embodiment, the air inlet 11 includes a first wall plate 111 and a second wall plate 112 connected to the first wall plate 111. The first wall plate 111 is disposed at an obtuse angle to the second wall plate 112 and the main body 12, respectively. The first wall plate 111 is connected to the main body 12 at a side away from the second wall plate 112. The air inlet 1101 is formed on the first wall plate 111. In this way, on the one hand, the structure formed by the first wall plate 111 and the second wall plate 112 is stepped; on the other hand, the extension direction f of the air inlet 1101 can be directed toward the side shell 70 connected to the second wall plate 112, so that the air inlet 1101 will not face the noise source such as the fan and the burner, so as to prevent the noise from being directly transmitted to the outside of the shell through the air inlet 1101.

[0040] In some embodiments, the angle between the first wall panel 111 and the main body 12 includes but is not limited to 90°, 110°, 120°, 135°, 150°, 165°, etc., and can be flexibly adjusted and set according to actual needs and is not limited here.

[0041] Please refer to Figures 1, 4 and 5. In one embodiment, the back shell assembly of the water heater further includes a sound absorbing member 20 connected to the inner wall surface of the air inlet portion 11. The sound absorbing member 20 includes a first sound absorbing member 21 and a second sound absorbing member 22 connected to the first sound absorbing member 21. The first sound absorbing member 21 is connected to the inner wall surface of the second wall plate 112, and the second sound absorbing member 22 is attached to the inner wall surface of the side shell 70 and arranged opposite to the air inlet 1101. In this way, the air inlet 1101 faces the sound absorbing member 20, thereby reducing the noise caused by the contact between the air inlet 1101 and the side shell 70 during the process of entering the inner part of the shell, and at the same time, effectively reducing the noise transmitted to the outside by the noise source through the air inlet 1101.

[0042] 1, 4 and 5, in some embodiments, the sound absorbing member 20 has a rough surface, which can enhance the diffuse reflection of sound waves to achieve the purpose of reducing noise. In addition, the sound absorbing member 20 includes but is not limited to extending from the top end of the back shell 10 to the bottom end of the back shell 10.

[0043] In some embodiments, the sound absorbing member 20 includes but is not limited to sound absorbing cotton. The sound absorbing cotton includes but is not limited to being fixedly connected to the inner wall surface of the air inlet 11 by bonding, clamping, pins, rivets, screws and other fasteners. The main function of the sound absorbing cotton is to absorb and attenuate noise. It is a porous material with connectivity. When sound enters these pores, friction will occur on the pore wall of the material, resulting in energy conversion, thereby achieving the effect of attenuating sound energy. Therefore, the sound absorbing cotton can effectively reduce the noise level and improve the quietness of the environment.

[0044] Referring to Figures 1 to 3, in one embodiment, the back shell assembly of the water heater further includes at least one damping shock absorbing member 30. The damping shock absorbing member 30 is disposed on the outer wall surface of the back shell 10, and the damping shock absorbing member 30 is used to abut against and fix to the wall. In this way, the vibration generated when the water heater is working is buffered and weakened by the damping shock absorbing member 30, so that the vibration noise is effectively reduced.

[0045] Generally speaking, there are various parts inside the water heater, including but not limited to the water heater fan, smoke hood, heat exchanger, etc., which are installed on the back shell 10 by at least one fastener. The installation position of the parts on the back shell 10 will produce strong vibration and thus generate vibration noise.

[0046] Referring to Figures 1 to 3, in one embodiment, the damping shock absorbing member 30 is disposed corresponding to the component installation position on the back shell 10. In this way, the damping shock absorbing member 30 can increase the dynamic stiffness near the component installation position on the back shell 10, that is, increase its anti-deformation ability, so that the vibration of the shell will be greatly reduced, and the vibration noise will also be effectively reduced.

[0047] Specifically, a damping shock-absorbing component 30 is installed at each component installation position, so that the vibration at each component installation position can be effectively buffered and weakened, thereby effectively reducing noise.

[0048] Optionally, the damping shock absorbing component 30 is installed on the outer wall surface of the back shell 10 in various ways including but not limited to bonding, clamping, etc.

[0049] Please refer to Figures 1 to 3. In one embodiment, the damping shock absorber 30 is provided with an avoidance portion 31 capable of avoiding fasteners at the part installation position, and the avoidance portion 31 is configured as a groove, a through hole or a notch. And / or, the damping shock absorber 30 is configured as a shock-absorbing pad, a shock-absorbing block or a shock-absorbing column. In this way, the damping shock absorber 30 is installed on the outer wall surface of the back shell 10, and the specific position is the position where the water heater fan, the smoke hood, and the heat exchanger are fixed to the back shell 10. The avoidance portion 31 of the damping shock absorber 30 can avoid the fasteners at the part installation position, and can avoid interference with the fasteners at the part installation position.

[0050] The fasteners at the installation position of the parts include but are not limited to various fastening structures such as screws, pins, and rivets.

[0051] In some embodiments, the damping shock absorber 30 is arranged at the fasteners that fix the parts that generate vibration, such as the fan and the burner, to the back shell 10. In addition, the damping shock absorber 30 is required to be in a compressed state after the water heater is installed on the wall, and the compression amount is, for example, 15% to 25%, and specifically, 20%. In this way, the dynamic stiffness of the back shell 10 near the installation position of the part can be increased, that is, its anti-deformation ability can be increased. When the water heater is working, the vibration generated by the parts such as the fan and the burner will be transmitted through the back shell 10, thereby generating noise. After increasing the dynamic stiffness, the anti-deformation ability of the back of the shell is enhanced, the vibration of the outer shell of the water heater will also be reduced, and the noise will also be reduced.

[0052] Generally speaking, when the sound generated by the noise source is transmitted to the outside of the back shell 10 through the air inlet 1101, it will generally be transmitted to the surroundings.

[0053] Please refer to Figures 1 to 3. In one embodiment, the back shell assembly of the water heater also includes two sealing strips 40. The two sealing strips 40 are respectively arranged on the two side portions of the outer wall of the back shell 10. The sealing strips 40 extend from the top of the back shell 10 to the bottom of the back shell 10. The sealing strips 40 are used to tightly abut against the wall. In this way, the two sealing strips 40 form seals on the opposite sides of the back of the shell, so that the noise transmitted from the back of the shell can only be transmitted from the top and bottom after the shell and the wall are directly reflected and attenuated. That is, without the need to install a back panel, the entire machine forms an extended air intake channel on the wall and the back of the back shell 10, thereby effectively reducing the noise transmitted from the air inlet 1101 to the outside of the back shell 10.

[0054] Specifically, the sealing strip 40 is connected to the air inlet 11, and is specifically connected to the outer wall surface of the second wall panel. Optionally, the sealing strip 40 includes but is not limited to a material with good elasticity and sealing performance such as rubber. In addition, after the water heater is installed, the sealing strip 40 is required to be in a compressed state. Considering the convenience of installation and the sealing performance on both sides after installation, the compression amount of the sealing strip 40 is, for example, 15% to 25%, and specifically, 20%. In addition, the air inlet 11 protruding outward on both sides of the back shell 10 can reduce the thickness of the sealing strip 40 while ensuring the sealing effect, thereby saving material costs.

[0055] In some embodiments, the air intake hole 1101 is located between two sealing strips 40 , which can extend the noise transmission path and better isolate the air intake noise.

[0056] In some embodiments, the back shell assembly of the water heater further includes at least two brackets 50 connected to the outer wall of the back shell 10. One bracket 50 is located at the top of the back shell 10, and the other bracket 50 is located at the bottom of the back shell 10. After the water heater is installed, it is fixedly mounted on the wall by fasteners through the two brackets 50.

[0057] In a specific embodiment, when noise sources such as fans and burners generate noise, part of the noise will propagate outward through the air inlet 11. Since the air inlet 1101 is arranged to extend obliquely in the direction away from the center L of the back shell 10 along the air inlet direction f of the air inlet 1101, that is, it will not face the noise sources such as fans and burners, it can avoid the noise from being directly propagated to the outside of the shell through the air inlet 1101. There are two paths for the noise to be transmitted to the outside of the shell through the air inlet 1101. One is diffraction, and the energy of the sound wave will be attenuated after diffraction. The other is that the sound wave will be constantly reflected in the shell. When the reflection angle is appropriate, the sound wave will be transmitted to the outside of the shell through the air inlet 1101. In this way, the noise can be effectively reduced. In addition, the air inlet 1101 faces the sound absorbing member 20, so that the noise caused by the contact between the air inlet 1101 and the side shell 70 during the process of entering the shell can be reduced, and the noise transmitted to the outside through the noise source through the air inlet 1101 can also be effectively reduced. In addition, the vibration generated when the water heater is working is buffered and weakened by the damping shock-absorbing member 30, so that the vibration noise is effectively reduced. Secondly, the two sealing strips 40 form a seal on the opposite sides of the back of the shell, so that the noise transmitted from the back of the shell can only be transmitted from the top and bottom after being directly reflected and attenuated by the shell and the wall. That is, without the need to install a back panel, the entire machine forms an extended air intake channel on the wall and the back of the back shell 10, thereby effectively reducing the noise transmitted from the air inlet hole 1101 to the outside of the back shell 10. It can be seen that the overall noise of the water heater can be effectively reduced.

[0058] Please refer to FIG. 1 to FIG. 3 . In one embodiment, a water heater is provided. The water heater includes the back shell assembly of the water heater of any of the above embodiments.

[0059] When the noise sources such as the fan and the burner generate noise, part of the noise will propagate outward through the air inlet 11. Since the air inlet 1101 is arranged to extend obliquely away from the center L of the back shell 10 along the air inlet direction f of the air inlet 1101, that is, it will not face the noise sources such as the fan and the burner, on the one hand, it can prevent the noise from being directly propagated to the outside of the shell through the air inlet 1101, and on the other hand, the air inlet resistance will not increase too much. There are two paths for the noise to be transmitted to the outside of the shell through the air inlet 1101. One is diffraction, and the energy of the sound wave will be attenuated after diffraction. The other is that the sound wave will be constantly reflected in the shell. When the reflection angle is appropriate, the sound wave will be transmitted to the outside of the shell through the air inlet 1101. In this way, the noise can be effectively reduced.

[0060] It should be noted that the back shell 10 in the present embodiment refers to the shell portion of the burner shell facing the wall. In addition, the front shell 60 refers to the portion of the burner shell facing away from the wall, that is, the position facing the user. Wherein, please refer to Figure 2, the shell of the burner includes a back shell 10, a front shell 60, two side shells 70, a top shell 80 and a bottom shell 90. The back shell 10 is arranged opposite to the front shell 60, the two side shells 70 are arranged opposite to each other, and the top shell 80 is arranged opposite to the bottom shell 90. The back shell 10 and the front shell 60 are respectively connected to the bottom shell 90, the two side shells 70, and the top shell 80.

[0061] In some embodiments, the back shell 10 and the bottom shell 90 in this embodiment include but are not limited to being integrally formed through various processes such as sheet metal processing and die-casting processing to form a whole, or are connected by welding, screws, pins, rivets and other fasteners to form a whole. This overall structure is also called a bottom shell.

[0062] It should be noted that the outer wall surface in this embodiment refers to the wall surface of the shell facing the external environment. Conversely, the inner wall surface refers to the wall surface of the shell facing the internal environment.

[0063] In the description of the present application, it should be understood that if 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", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0064] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of this application, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0065] In this application, unless otherwise clearly specified and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated 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 this application can be understood according to the specific circumstances.

[0066] In the present application, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the 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. The first feature being "below", "below" and "below" the 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.

[0067] It should be noted that if 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. If 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. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this application are for illustrative purposes only and do not represent the only implementation method.

[0068] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described 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.

[0069] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A back shell assembly of a water heater, characterized in that: The back shell assembly of the water heater comprises: A back shell (10), wherein a side portion of the back shell (10) protrudes outward to form an air inlet portion (11), and one or more air inlet holes (1101) are formed on the air inlet portion (11); the air inlet holes (1101) are arranged obliquely so that their air inlet direction extends in a direction away from the center L of the back shell (10).

2. The back shell assembly of the water heater according to claim 1, characterized in that: The air inlet portion (11) is provided on two opposite side portions of the back shell (10).

3. The back shell assembly of the water heater according to claim 1, characterized in that: The air inlet portion (11) extends from the bottom end of the back shell (10) to the top end of the back shell (10); all the air inlet holes (1101) are arranged on the air inlet portion (11) in sequence and at intervals in the direction from the bottom end of the back shell (10) to the top end of the back shell (10).

4. The back shell assembly of the water heater according to claim 1, characterized in that: The back shell (10) further comprises a main body (12) connected to the air inlet portion (11); the air inlet portion (11) comprises a first wall plate (111) and a second wall plate (112) connected to the first wall plate (111); the first wall plate (111) is arranged at an obtuse angle to the second wall plate (112) and the main body (12), respectively; the first wall plate (111) is connected to the main body (12) at a side away from the second wall plate (112); and the air inlet hole (1101) is formed on the first wall plate (111).

5. The back shell assembly of the water heater according to claim 4, characterized in that: The back shell assembly of the water heater also includes a sound absorbing member (20) connected to the inner wall surface of the air inlet portion (11); the sound absorbing member (20) includes a first sound absorbing portion (21) and a second sound absorbing portion (22) connected to the first sound absorbing portion (21), the first sound absorbing portion (21) being connected to the inner wall surface of the second wall plate (112), and the second sound absorbing portion (22) being closely connected to the inner wall surface of the side shell (70) and being arranged opposite to the air inlet hole (1101).

6. The back shell assembly of the water heater according to claim 1, characterized in that: The back shell assembly of the water heater further comprises at least one damping shock absorbing component (30), wherein the damping shock absorbing component (30) is arranged on the outer wall surface of the back shell (10), and the damping shock absorbing component (30) is used for being abutted and fixed against a wall.

7. The back shell assembly of the water heater according to claim 6, characterized in that: The damping shock absorbing component (30) is arranged corresponding to the component installation position on the back shell (10).

8. The back shell assembly of the water heater according to claim 7, characterized in that: The damping shock absorbing component (30) is provided with an avoidance portion (31) capable of avoiding the fastener at the component installation position, and the avoidance portion (31) is configured as a groove, a through hole or a notch; and / or the damping shock absorbing component (30) is configured as a shock absorbing pad, a shock absorbing block or a shock absorbing column.

9. The back shell assembly of the water heater according to any one of claims 1 to 8, characterized in that: The back shell assembly of the water heater also includes two sealing strips (40), which are respectively arranged on two side portions of the outer wall of the back shell (10), and the sealing strip (40) extends from the top end of the back shell (10) to the bottom end of the back shell (10), and the sealing strip (40) is used to tightly abut against the wall; the air inlet (1101) is located between the two sealing strips (40).

10. A water heater, characterized in that: The water heater comprises the back shell assembly of the water heater according to any one of claims 1 to 9.

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