Gas water heating equipment

Abstract

The utility model relates to the technical field of hot water supply equipment, and discloses gas water heating equipment. The gas water heating equipment comprises a shell and a back shell, an air inlet is formed in the back face of the shell, a first magnetic attraction piece is arranged on the back face of the shell, the back shell covers the back face of the shell, an air inlet space is formed between the back shell and the back face of the shell, and the air inlet communicates with an outer air inlet structure through the air inlet space; the back shell is provided with a second magnetic attraction piece, and the first magnetic attraction piece and the second magnetic attraction piece are connected in a magnetic attraction mode so that the back shell can be attracted and fixed to the back face of the shell. The shell is provided with the first magnetic attraction piece, the back shell is provided with the second magnetic attraction piece corresponding to the first magnetic attraction piece, and the back shell is attracted and fixed to the back face of the shell through magnetic attraction connection of the first magnetic attraction piece and the second magnetic attraction piece, so that the back shell can be installed on the shell of the gas water heating equipment, and the back shell can be conveniently installed and detached; the assembling process of the back shell is simplified, the assembling efficiency of the back shell is improved, and later maintenance and replacement are facilitated.

Description

TECHNICAL FIELD

[0001] The utility model relates to hot water supply equipment technical field especially relates to a gas hot water equipment. BACKGROUND

[0002] The gas hot water equipment is a device that uses gas as energy to heat water. The gas hot water equipment is widely used in family, commercial and industrial fields for hot water supply. Common types of gas hot water equipment include gas water heater, gas wall-hanging stove, etc.

[0003] In the prior art, as shown in Figure 1 and Figure 2 , the gas hot water equipment 3' is usually installed on the wall 1'. When using the gas hot water equipment 3', part of the noise inside the gas hot water equipment 3' will be transmitted through the shell of the gas hot water equipment 3', and the other part will be diffracted through the air inlet and air inlet space of the gas hot water equipment 3' in turn. The noise diffracted from the air inlet space will be reflected by the wall 1', and the noise diffracted from the air inlet will be directly transmitted to the user's ear after being reflected by the wall 1', resulting in a large amount of noise around the gas hot water equipment 3'. Therefore, in the prior art, a back shell is provided at the air inlet on the back of the gas hot water equipment, and an air inlet space is formed between the back shell and the back of the gas hot water equipment. The sound-absorbing cotton is arranged in the air inlet space. The back shell forms a surrounding for the noise transmitted through the back of the gas hot water equipment and the noise leaked from the air inlet, and the sound-absorbing cotton further absorbs the noise, thereby reducing the noise transmission from the side of the gas hot water equipment. However, the back shell and the back of the gas hot water equipment are fixed together by screws in the prior art. Since a large number of screws are required, a locking tool is needed to tighten each screw one by one, resulting in low assembly efficiency of the back shell. UTILITY MODEL CONTENTS

[0004] The utility model solves the problem of low assembly efficiency of the back shell of the existing gas hot water equipment.

[0005] The above technical problem is solved by the following technical scheme:

[0006] A gas hot water equipment comprises:

[0007] A shell is provided with an air inlet on the back, and a first magnetic attraction element is arranged on the back of the shell.

[0008] A back shell has an outer air inlet structure, the back shell covers the back of the shell body and forms an air inlet space between the back of the shell body and the back shell, and the air inlet is communicated with the outer air inlet structure through the air inlet space; the back shell is provided with a second magnetic attraction element, and the first magnetic attraction element and the second magnetic attraction element are magnetically connected to enable the back shell to be adsorbed and fixed to the back of the shell body.

[0009] Compared with the background art, the gas hot water equipment has the beneficial effects that: due to the first magnetic attraction element arranged on the shell body and the second magnetic attraction element arranged on the back shell corresponding to the first magnetic attraction element, when the back shell is installed on the back of the shell body, the back shell only needs to be close to the back of the shell body, and the first magnetic attraction element and the second magnetic attraction element are magnetically connected to enable the back shell to be adsorbed and fixed to the back of the shell body, so that the back shell can be installed on the shell body of the gas hot water equipment, the installation and disassembly of the back shell are facilitated, the number of screws used is reduced, the assembly process of the back shell is simplified, the assembly efficiency of the back shell is improved, and the later maintenance and replacement are facilitated.

[0010] In one of the embodiments, the back shell comprises a back plate, a side wall arranged around the outer periphery of the back plate, and a flange arranged at the outer periphery of the side wall, a plurality of assembly grooves are arranged on the flange, the second magnetic attraction element is arranged in each assembly groove, and the mounting recess is formed between the back plate and the side wall.

[0011] In one of the embodiments, an exhaust hole is arranged on the inner wall of each assembly groove and communicated with the outside.

[0012] In one of the embodiments, the magnetic attraction end face of the second magnetic attraction element is in the same horizontal plane as the plane where the opening of the assembly groove is located.

[0013] In one of the embodiments, the flange is provided with a mounting hole for connecting with the shell body.

[0014] In one of the embodiments, an acoustic absorption element is further arranged, the front surface of the acoustic absorption element faces away from the inner bottom surface of the mounting recess, and the front surface of the acoustic absorption element and the back surface of the shell body leave the air inlet space therebetween.

[0015] In one of the embodiments, a mesh plate is further arranged, the back shell and the mesh plate are integrally injection molded, the mesh plate is distributed with a plurality of honeycomb holes arranged in an array, and the acoustic absorption element is clamped between the groove bottom surfaces of the mesh plate mounting recesses.

[0016] In one of the embodiments, the coverage area of the back shell is adapted to the area of the back surface of the shell body, and the coverage area of the acoustic absorption element is adapted to the area of the back surface of the shell body.

[0017] In one embodiment, the back shell further includes a plurality of support ribs, which are integrally injection molded with the sidewall. The plurality of support ribs are arranged in a crisscross pattern to form a grid structure, and the mesh plate is integrally injection molded with the grid structure.

[0018] In one embodiment, the air inlet is located on the upper side of the back of the housing, and the external air inlet structure is located on the lower side of the back housing. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of the structure and noise distribution of a gas-fired water heater installed on a wall in the prior art;

[0021] Figure 2 A cross-sectional view and noise distribution diagram of a gas-fired water heater installed on a wall in the prior art;

[0022] Figure 3 This is a schematic diagram of the structure of a gas-fired water heater according to an embodiment of the present utility model;

[0023] Figure 4 This is an explosion diagram of a gas-fired water heater according to an embodiment of the present invention;

[0024] Figure 5 for Figure 3 The diagram shows a cross-sectional view of the gas-fired water heater.

[0025] Figure 6 for Figure 5 A magnified view of part A in the middle;

[0026] Figure 7 This is a schematic diagram of the back shell structure in a gas-fired water heater according to an embodiment of the present invention;

[0027] Figure 8 for Figure 7 Another structural diagram from a different perspective;

[0028] Figure 9 for Figure 8 A magnified view of part B in the middle section;

[0029] Figure 10 This is a bottom view of the back shell of a gas-fired water heater according to an embodiment of the present invention.

[0030] Explanation of reference numerals in the attached figures:

[0031] Prior art reference numerals:

[0032] 1' Wall; 3' Gas-fired water heater.

[0033] Reference numerals in the drawings of this utility model:

[0034] 1. Mesh panel; 2. Sound-absorbing component; 3. Gas-fired water heater; 301. Housing; 3011. Air inlet; 4. Back cover; 401. Mounting groove; 402. External air inlet structure; 403. Support rib; 404. Back plate; 405. Side wall; 406. Flanged edge; 4061. Mounting hole; 4062. Assembly slot; 4063. Exhaust hole; 5. Air inlet space; 6. Second magnetic suction component. Detailed Implementation

[0035] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0036] In the description of this application, it should be understood that the terms "upper", "lower", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0038] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] In related technologies, to solve the noise leakage from the rear air inlet of the gas water heater in the existing solution, a back cover is installed on the rear air inlet of the gas water heater. An air intake space is formed between the back cover and the back of the gas water heater. Sound-absorbing cotton is placed in the air intake space. The back cover surrounds the noise transmitted from the back of the gas water heater and the noise leaking from the air inlet. The sound-absorbing cotton then absorbs the noise, thereby reducing the noise transmitted from the periphery of the gas water heater. However, the existing back cover is fixed to the back of the gas water heater with screws. Since a large number of screws are required, each screw needs to be tightened one by one with a locking tool, resulting in low assembly efficiency of the back cover.

[0040] To solve the above technical problems, the following will be combined with... Figures 3 to 10 The following describes embodiments of the present invention.

[0041] According to an embodiment of the present invention, a gas-fired water heater is provided, including a housing 301 and a back cover 4.

[0042] Specifically, such as Figure 4 As shown, an air inlet 3011 is provided on the back of the housing 301. The back of the housing 301 is provided with a first magnetic attraction element.

[0043] Specifically, such as Figure 5 and Figure 6 As shown, the back cover 4 is provided with an external air inlet structure 402. The back cover 4 is covered on the back of the housing 301, and an air inlet space 5 is formed between the back cover 4 and the back of the housing 301. The air inlet 3011 is connected to the external air inlet structure 402 through the air inlet space 5.

[0044] It is understandable that the external air inlet structure 402 can be a complete air inlet opened on the back shell itself, and the air inlet of the back shell is connected to the air inlet 3011 of the shell 301 through the air inlet space 5. Alternatively, the external air inlet structure 402 and the back of the shell 301 can enclose each other to form an air inlet, and the air inlet formed by the external air inlet structure 402 and the back of the shell 301 can be connected to the air inlet 3011 of the shell 301 through the air inlet space 5.

[0045] Specifically, such as Figure 7 As shown, the back shell 4 is provided with a second magnetic member 6. The first magnetic member and the second magnetic member 6 are connected by magnetic attraction so that the back shell 4 is attracted and fixed to the back of the shell 301.

[0046] This gas-fired water heater has a first magnetic suction component on the housing 301 and a second magnetic suction component 6 on the back cover 4 corresponding to the first magnetic suction component. When installing the back cover 4 on the back of the housing 301, simply bring the back cover 4 close to the back of the housing 301, and the back cover 4 will be magnetically attached to the back of the housing 301 by the first magnetic suction component and the second magnetic suction component 6. This allows the back cover 4 to be installed on the housing 301 of the gas-fired water heater, which facilitates the installation and removal of the back cover 4, reduces the number of screws used, simplifies the assembly process of the back cover 4, improves the assembly efficiency of the back cover 4, and also facilitates later maintenance and replacement.

[0047] Specifically, the first magnetic attractor and the second magnetic attractor 6 can both be magnets, or the first magnetic attractor is a ferromagnetic metal part on the back of the housing 301 or the back of the housing 301 is provided with a ferromagnetic metal part, then the second magnetic attractor 6 is a magnet; or the first magnetic attractor is a magnet, then the second magnetic attractor 6 is a ferromagnetic metal part on the back shell 4 or the back shell 4 is provided with a ferromagnetic metal part.

[0048] For example, the first magnetic component is a ferromagnetic metal part on the back of the housing 301, and the second magnetic component 6 is a magnet. When the back cover 4 is installed, the magnet on the back cover 4 can be attracted to the metal part on the back of the housing 301, ensuring that the back cover 4 is fixed on the housing 301.

[0049] In one embodiment, such as Figure 7 As shown, the back cover 4 includes a back plate 404, a side wall 405, and a flange 406. The side wall 405 is arranged around the outer periphery of the back plate 404, and the flange 406 is disposed on the outer periphery of the side wall 405. The flange 406 is provided with a mounting groove 4062, and each mounting groove 4062 is provided with a second magnetic member 6. A mounting groove 401 is formed between the back plate 404 and the side wall 405.

[0050] A sidewall 405 is provided on the outer periphery of the back plate 404, forming an installation groove 401 between the sidewall 405 and the back plate 404 to facilitate the manufacturing of the back cover 4. An assembly groove 4062 is provided on the flange 406, and the second magnetic member 6 is installed in the assembly groove 4062 to ensure that the second magnetic member 6 is firmly fixed to the back cover 4. This ensures a secure and reliable connection between the back cover 4 and the gas water heater, preventing shaking or loosening even during operation.

[0051] Specifically, the cross-section of the assembly groove 4062 can be elongated, circular, spherical, etc. In this embodiment, the type of the assembly groove 4062 is not specifically limited.

[0052] Specifically, the back panel 404, side wall 405, and flange 406 can be integrally injection molded.

[0053] Specifically, the flange 406 fits snugly against the back of the gas water heater 3, and a sealing strip can be provided between the flange 406 and the back of the gas water heater 3 to ensure the sealing of the connection between the back cover 4 and the back of the gas water heater 3.

[0054] In one embodiment, such as Figures 7 to 9 As shown, each assembly slot 4062 has an exhaust hole 4063 on its inner wall, and the assembly slot 4062 is connected to the outside through the exhaust hole 4063.

[0055] When the second magnetic component 6 is inserted into the assembly slot 4062, the air in the assembly slot 4062 is compressed. Since each assembly slot 4062 has an exhaust hole 4063 on its inner wall, the air in the assembly slot 4062 can be discharged through the exhaust hole 4063, ensuring that the second magnetic component 6 can be smoothly installed into the assembly slot 4062.

[0056] Specifically, an exhaust hole 4063 is provided on the inner wall of the assembly groove 4062 to facilitate the smooth insertion of the second magnetic component 6 into the assembly groove 4062. To ensure that the second magnetic component 6 is firmly fixed in the assembly groove 4062, an interference fit can be used. The interference fit utilizes the slight dimensional difference between the assembly groove 4062 and the second magnetic component 6 to ensure that the second magnetic component 6 fits tightly against the inner wall of the assembly groove 4062 after insertion, forming sufficient friction to resist vibrations, displacements, and other situations that may occur during the operation of the gas water heater, ensuring that the second magnetic component 6 is firmly fixed in the assembly groove 4062 and providing a reliable guarantee for the stable operation of the gas water heater.

[0057] In one embodiment, such as Figure 7 As shown, the magnetic end face of the second magnetic component 6 is on the same horizontal plane as the opening of the assembly groove 4062.

[0058] When the magnetic end face of the second magnetic member 6 is at the same level as the plane where the opening of the mounting groove 4062 is located, when the back shell 4 with the second magnetic member 6 is installed onto the housing 301 of the gas water heater, the second magnetic member 6 can fully contact the first magnetic member on the back of the housing 301 and be firmly attached to the housing 301. At the same time, it ensures that the flange 406 fits snugly against the surface of the housing 301, preventing gaps between the flange 406 and the surface of the housing 301 that could cause noise to leak from the gaps.

[0059] In one embodiment, such as Figure 7 As shown, the flange 406 is provided with a mounting hole 4061 for connecting with the housing 301.

[0060] When the back cover 4 is installed on the housing 301, the back cover 4 can be fixed on the housing 301 by the attraction between the second magnetic member 6 and the first magnetic member. In addition, the back cover 4 can be further secured to the back of the housing 301 by fasteners through the mounting hole 4061, ensuring the stability of the entire structure and preventing shaking or loosening even when the equipment is running.

[0061] Specifically, the back cover 4 can be provided with one or more mounting holes 4061. When the back cover 4 is installed on the housing 301, since the back cover 4 can be fixed to the housing 301 by the attraction between the second magnetic member 6 and the first magnetic member, fasteners can be inserted into the mounting holes 4061 to further fix the back cover 4, or fasteners can be used to fix the back cover 4 without using fasteners.

[0062] Specifically, the mounting hole 4061 can be a through hole, a threaded hole, a snap-fit ​​hole, etc. In this embodiment, the type of mounting hole 4061 is not specifically limited.

[0063] In one embodiment, such as Figures 4-6 As shown, it also includes a sound-absorbing component 2, with the front of the sound-absorbing component 2 facing away from the inner bottom surface of the mounting groove 401, and an air intake space 5 is left between the front of the sound-absorbing component 2 and the back of the housing 301.

[0064] The sound-absorbing component 2 is installed on the back of the housing 301 through the back shell 4, leaving a gap between the sound-absorbing component 2 and the back of the housing 301. This gap forms an air intake space 5. Since the air intake space 5 is connected to the air inlet 3011 of the gas water heater 3, when the gas water heater 3 is running, outside air enters into the air intake space 5 from the outside air inlet structure 402 and enters the air inlet 3011 of the gas water heater 3 along the air intake space 5. This not only removes some of the heat from the back of the gas water heater 3 for appropriate cooling, but also, since the sound-absorbing component 2 is set in the air intake space 5, the noise generated when outside air flows in the air intake space 5 can be absorbed by the sound-absorbing component 2, thereby reducing the noise caused by outside air entering the air intake space 5.

[0065] In addition, some of the noise generated by the fan and water pump in the gas water heater 3 is diffracted out through the air inlet 3011 of the gas water heater 3. Since the air inlet 3011 is connected to the air intake space 5 and the air intake space 5 is equipped with a sound-absorbing component 2, the diffracted noise directly enters the sound-absorbing component 2 and is absorbed by the sound-absorbing component 2 after multiple refractions, thereby reducing the noise leakage from the air inlet 3011.

[0066] In one embodiment, such as Figure 7 and Figure 8As shown, it also includes a mesh plate 1, and the back shell 4 is an injection molded part and is integrally injection molded with the mesh plate 1. The mesh plate 1 has honeycomb holes arranged in an array. The sound-absorbing part 2 is sandwiched between the mesh plate 1 and the bottom surface of the mounting groove 401.

[0067] The back shell 4 is made of injection molded material. The back shell 4 and the mesh plate 1 are integrally injection molded. Compared with the traditional manufacturing process, it can achieve high-precision and large-scale production, reduce production costs, and improve production efficiency and product consistency.

[0068] Specifically, the back shell 4 and the mesh plate 1 are integrally injection molded, which can be done by single injection molding or two-time injection molding. In this embodiment, the specific injection molding method of the back shell 4 and the mesh plate 1 is not limited.

[0069] Meanwhile, when the sound-absorbing component 2 uses sound-absorbing cotton, the clamping structure formed by the mesh plate 1 and the back shell 4 can apply a certain pressure to both sides of the sound-absorbing cotton to ensure that the distance between the side of the sound-absorbing cotton and the back of the gas water heater 3 is constant, ensuring that the sound-absorbing cotton will not deform during long-term use, and thus will not compress or block the air intake space 5, ensuring the air intake effect and noise reduction effect of the air intake space 5.

[0070] It should be noted that the distance between the mesh plate 1 and the back shell 4 can be designed to be less than the thickness of the sound-absorbing component 2, so as to ensure that the sound-absorbing component 2 is clamped and fixed between the mesh plate 1 and the back shell 4.

[0071] Specifically, the mesh plate 1 and the back shell 4 can be arranged in parallel or at an angle. In this embodiment, the positional relationship between the mesh plate 1 and the back shell 4 is not specifically limited.

[0072] Specifically, the thickness and density of the sound-absorbing component 2 can be adjusted according to the desired sound absorption effect. Similarly, the sound-absorbing component 2 can be designed as a flat plate, a wave shape, or other specific shapes. The size of the sound-absorbing component 2 can be adapted to the back surface area of ​​the housing 301 to ensure the sound absorption and noise reduction effect of the sound-absorbing component 2. In this embodiment, the thickness and shape of the sound-absorbing component 2 are not specifically limited.

[0073] In one embodiment, such as Figure 4 As shown, the coverage area of ​​the back shell 4 is adapted to the back surface area of ​​the housing 301, and the coverage area of ​​the sound-absorbing component 2 is adapted to the back surface area of ​​the housing 301.

[0074] The coverage area of ​​the sound-absorbing component 2 is set to match the back dimensions of the housing 301, ensuring that the entire back area of ​​the housing 301 is covered by the sound-absorbing component 2. This more effectively absorbs noise within the air intake space 5, improves sound absorption efficiency, reduces noise transmission, and enhances the overall noise reduction effect. Simultaneously, selecting a sound-absorbing component 2 of the appropriate size makes it easier to install and fix, reducing the complexity of the installation process.

[0075] Specifically, such as Figure 4 As shown, the back of the housing 301 is rectangular. The sound-absorbing component 2 can be shaped into a rectangle similar in size to the back of the housing 301 to ensure the sound absorption effect of the sound-absorbing component 2 and facilitate its installation. Therefore, the overall shape and coverage area of ​​the sound-absorbing component 2 can be adaptively adjusted according to the shape of the back of the housing 301. In this embodiment, no specific limitations are imposed on the shape and size of the sound-absorbing component 2.

[0076] In one embodiment, such as Figure 7 As shown, the back shell 4 also includes multiple support ribs 403, which are integrally injection molded with the side wall 405. The multiple support ribs 403 are arranged in a crisscross pattern to form a grid structure, and the mesh plate 1 is integrally injection molded with the grid structure.

[0077] The support rib 403 is integrally formed with the side wall 405, and the mesh plate 1 is injection molded in the mesh structure, which simplifies the installation process of the mesh plate 1. No additional fasteners such as screws or clips are required, which improves assembly efficiency and reduces production costs. At the same time, it ensures that the mesh plate 1 is firmly fixed on the back shell 4, reducing loosening or deformation caused by long-term use or temperature changes, and enhancing the stability of the overall structure.

[0078] The crisscrossing support ribs 403, forming a grid structure, significantly enhance the structural strength of the back shell 4, preventing deformation under load or prolonged use, and ensuring the stability and durability of the connection between the back shell 4 and the mesh plate 1. Simultaneously, the support ribs help to evenly distribute the weight and pressure of the mesh plate 1, preventing localized stress concentration, reducing the potential risk of breakage of the mesh plate 1, and extending the service life of the component.

[0079] In one embodiment, combined Figures 4 to 6 As shown, the air inlet 3011 is located on the upper side of the back of the housing 301, and the external air inlet structure 402 is located on the lower side of the back shell 4, so that the distance between the air inlet 3011 and the external air inlet structure 402 is long enough to ensure a sufficiently long air intake space 5.

[0080] The air inlet 3011 is positioned on the upper side near the air intake space 5, while the outer air inlet structure 402 is positioned on the lower side near the air intake space 5. The distance between the air inlet 3011 and the outer air inlet structure 402 is maximized. This ensures that noise entering the air intake space 5 from the air inlet 3011 must travel a longer path before reaching the outer air inlet structure 402. Because the noise waves travel a longer distance from the air inlet 3011 to the outer air inlet structure 402 within the air intake space 5, the number of reflections by the sound-absorbing component 2 is increased, thereby improving the noise absorption effect of the sound-absorbing component 2 and effectively reducing the noise generated by the gas water heater 3 during operation, minimizing the impact on users. Furthermore, outside air enters the gas water heater 3 through the air inlet 3011 at the top of the casing 301, and then the airflow flows downwards from the top of the gas water heater 3. During this airflow, effective heat dissipation is achieved for the electrical components inside the gas water heater 3.

[0081] Specifically, the external air inlet structure 402 can be configured in any existing shape, such as rectangular, circular, elongated, or grille. In this embodiment, the shape of the external air inlet structure 402 is not specifically limited.

[0082] In one embodiment, such as Figure 8 As shown, the area of ​​the mesh plate 1 is matched with the area of ​​the back plate 404.

[0083] The area of ​​the mesh panel 1 is set to match the area of ​​the back panel 404 so that the mesh panel 1 and the back panel 404 can be aligned, facilitating the integral injection molding of the mesh panel 1 and the back panel 4. At the same time, it ensures that the sound-absorbing component 2 is firmly clamped between the mesh panel 1 and the back panel 404.

[0084] In one embodiment, the back cover 4 is made of one of polypropylene (PP) injection molding, acrylonitrile-butadiene-styrene copolymer (ABS) injection molding, or polyphenylene sulfide (PPS) injection molding.

[0085] The back cover 4 is made of polypropylene (PP) injection molded parts, which has the advantages of low density, light weight, relatively low cost, easy processing and molding, and good heat resistance, making it suitable for high temperature environments.

[0086] Back cover 4 is made of acrylonitrile-butadiene-styrene copolymer (ABS) injection molding, which has the advantages of chemical resistance and easy processing, and is suitable for back cover 4 that requires good appearance, high impact strength and dimensional stability.

[0087] The back cover 4 is made of polyphenylene sulfide (PPS) injection molded parts, which has the advantages of extremely high heat resistance, chemical corrosion resistance, flame retardancy and mechanical strength.

[0088] Specifically, the material of the back cover 4 can be customized according to the specific application environment of the gas water heater 3 to achieve optimal durability. In this embodiment, no specific limitations are imposed on the material of the back cover 4.

[0089] The working principle of the gas-fired water heater 3 in this embodiment is described as follows:

[0090] First, install the sound-absorbing component 2 in the mounting groove 401 between the back shell 4 and the mesh plate 1. Align the back shell 4 and the mounting hole 4061 on the housing 301. The back shell 4 is attracted to the first magnetic component on the back of the housing 301 by the second magnetic component 6. Then, fix the back shell 4 to the back of the housing 301 by fasteners inserted into the mounting hole 4061.

[0091] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.

[0092] The specific embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are detailed, they should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A gas-fired hot water device, characterized in that, include: The housing (301) has an air inlet (3011) on its back side, and the back side of the housing (301) is provided with a first magnetic suction element; The back shell (4) has an external air inlet structure (402). The back shell (4) covers the back of the housing (301) and forms an air inlet space (5) between the back of the housing (301) and the back of the housing (301). The air inlet (3011) is connected to the external air inlet structure (402) through the air inlet space (5). The back shell (4) is provided with a second magnetic suction member (6). The first magnetic suction member and the second magnetic suction member (6) are magnetically connected to each other so that the back shell (4) is attracted and fixed to the back of the housing (301).

2. The gas-fired hot water equipment according to claim 1, characterized in that: The back shell (4) includes a back plate (404), a side wall (405) surrounding the outer periphery of the back plate (404), and a flange (406) disposed on the outer periphery of the side wall (405). The flange (406) is provided with a plurality of mounting slots (4062), and the second magnetic suction member (6) is installed in each mounting slot (4062). An installation groove (401) is formed between the back plate (404) and the side wall (405).

3. The gas-fired hot water equipment according to claim 2, characterized in that: Each of the assembly slots (4062) has an exhaust hole (4063) on its inner wall that communicates with the outside.

4. The gas-fired hot water equipment according to claim 2, characterized in that: The magnetic end face of the second magnetic member (6) is on the same horizontal plane as the opening plane of the assembly groove (4062).

5. The gas-fired hot water equipment according to claim 2, characterized in that: The flange (406) is provided with a mounting hole (4061) for connecting with the housing (301).

6. The gas-fired hot water equipment according to claim 2, characterized in that: It also includes a sound-absorbing component (2), the front of which faces away from the inner bottom surface of the mounting groove (401), and the air inlet space (5) is left between the front of the sound-absorbing component (2) and the back of the housing (301).

7. The gas-fired hot water equipment according to claim 6, characterized in that: It also includes a mesh plate (1), the back shell (4) and the mesh plate (1) are integrally injection molded, and the mesh plate (1) has honeycomb holes arranged in an array; the sound-absorbing component (2) is sandwiched between the mesh plate (1) and the bottom surface of the mounting groove (401).

8. The gas-fired hot water equipment according to claim 7, characterized in that: The coverage area of ​​the back shell (4) is adapted to the back surface area of ​​the housing (301), and the coverage area of ​​the sound-absorbing component (2) is adapted to the back surface area of ​​the housing (301).

9. The gas-fired hot water equipment according to claim 7, characterized in that: The back shell (4) also includes a plurality of support ribs (403), which are integrally injection molded with the side wall (405). The plurality of support ribs (403) are arranged in a crisscross pattern to form a grid structure. The mesh plate (1) is integrally injection molded with the grid structure.

10. The gas-fired hot water equipment according to any one of claims 1-9, characterized in that: The air inlet (3011) is located on the upper side of the back of the housing (301), and the external air inlet structure (402) is located on the lower side of the back shell (4).

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