Noise reduction structure of gas water heating equipment and gas water heating equipment

Abstract

The utility model relates to hot water supply equipment technical field discloses a kind of noise reduction structure and gas hot water equipment of gas hot water equipment, wherein, the noise reduction structure of gas hot water equipment includes: shell, cover plate and sound-absorbing element, along the front-back direction of shell, the back of shell is concave and is formed into mounting recess, the groove bottom surface of mounting recess is equipped with the inner air inlet that is communicated with shell interior;Cover plate covers the slot of mounting recess to form air inlet space, and sound-absorbing element is located in air inlet space;Mounting recess and cover plate are equipped with air inlet passage, and shell and / or cover plate are equipped with outer air inlet, and outer air inlet is communicated with inner air inlet by air inlet passage.The utility model sets up sound-absorbing element between the groove bottom of mounting recess and cover plate, can absorb the noise that diffracts from inner air inlet and air inlet passage, reduce the noise that leaks from gas hot water equipment and the noise that is transmitted to user ear, improve the user's use experience.

Description

Technical Field

[0001] This utility model relates to the field of hot water supply equipment technology, and in particular to a noise reduction structure for a gas-fired hot water equipment and the gas-fired hot water equipment itself. Background Technology

[0002] Gas-fired water heating equipment is a device that uses gas as an energy source to heat water. It is widely used in homes, businesses, and industries for supplying hot water. Common types of gas-fired water heating equipment include gas water heaters and gas-fired wall-hung boilers.

[0003] In existing technologies, such as Figure 1 and Figure 2 As shown, the gas water heater 3' is typically installed on the wall 1'. When the gas water heater 3' is in use, some of the noise inside the gas water heater 3' is transmitted through the casing of the gas water heater 3', and another part is diffracted out through the air inlet and air intake channel of the gas water heater 3' in sequence. The noise diffracted from the air intake channel is reflected by the wall 1', and the noise diffracted from the air inlet is directly transmitted to the user's ear after being reflected by the wall 1', resulting in relatively large peripheral noise of the gas water heater 3'. Utility Model Content

[0004] The first technical problem solved by this utility model is to provide a noise reduction structure for gas-fired water heaters, which effectively solves the problem of excessive noise in existing gas-fired water heaters, significantly reduces the noise generated during operation, and improves user comfort.

[0005] The second technical problem solved by this utility model is to provide a gas-fired water heater that effectively solves the problem of excessive noise in existing gas-fired water heaters, significantly reduces the noise generated during operation, and improves user comfort.

[0006] The aforementioned first technical problem is solved by the following technical solution:

[0007] A noise reduction structure for a gas-fired water heater includes: a housing, a cover plate, and a sound-absorbing component. Along the front-rear direction of the housing, the back of the housing is recessed to form a mounting groove. The bottom surface of the mounting groove has an internal air inlet communicating with the interior of the housing. The cover plate seals the opening of the mounting groove to form an air inlet space, and the sound-absorbing component is located within the air inlet space. An air inlet channel is provided between the mounting groove and the cover plate. An external air inlet is provided on the housing and / or the cover plate, and the external air inlet communicates with the internal air inlet through the air inlet channel.

[0008] Compared with the prior art, the noise reduction structure of the gas-fired water heater described in this utility model has the following beneficial effects:

[0009] During operation of the gas-fired water heater, outside air enters the air intake channel through the external air inlet and then flows into the internal air inlet. Because a sound-absorbing component exists within the air intake space formed between the cover and the mounting groove, the noise generated by the outside air flowing through the air intake channel is absorbed, thus reducing the noise caused by outside air entering the air intake channel. Furthermore, since some noise generated by the fan and water pump inside the gas-fired water heater is diffracted through the internal air inlet, this invention, by placing a sound-absorbing component between the bottom surface of the mounting groove and the cover, can also absorb noise diffracted from the internal air inlet and the air intake channel, reducing noise leakage from the gas-fired water heater and noise transmitted to the user's ears, improving the user experience. Moreover, the mounting groove formed by the recess on the back of the casing ensures that noise, when propagating circumferentially along the back of the casing, must pass through the sidewall of the mounting groove and then the sidewall of the casing before it can be transmitted. This increases the difficulty of noise transmission through the sidewalls of the casing and also dissipates noise energy, reducing circumferential noise propagation, thereby contributing to noise reduction.

[0010] In one embodiment, along the width direction of the housing, a plurality of first snap-fit ​​portions are respectively provided on opposite sides of the mounting groove on the back of the housing, and the plurality of first snap-fit ​​portions are spaced apart along the height direction of the housing; a plurality of second snap-fit ​​portions are provided at corresponding positions on the cover plate; the cover plate is snapped with the first snap-fit ​​portions and the second snap-fit ​​portions and connected to the housing by fasteners.

[0011] In one embodiment, the first snap-fit ​​portion is a snap-fit ​​interface, and the second snap-fit ​​portion includes a first folding plate and a second folding plate. One end of the first folding plate is connected to the cover plate and is set at an angle to the cover plate, and the other end is connected to the second folding plate. The second folding plate is set parallel to the cover plate. When the cover plate and the housing are in a connected state, the second folding plate passes through the snap-fit ​​interface and abuts against the inner surface of the housing opposite to the cover plate.

[0012] In one embodiment, along the height direction of the housing, the inner air inlet is located at the top of the bottom surface of the mounting groove, and the outer air inlet is located at the bottom of the housing and / or the cover plate.

[0013] In one embodiment, along the height direction of the housing, the bottom of the mounting groove is provided with an opening, which together with the cover plate forms the external air inlet.

[0014] In one embodiment, the sound-absorbing element is installed on the inner surface of the cover plate opposite to the bottom surface of the mounting groove, and the sound-absorbing element and the bottom surface of the mounting groove form the air inlet channel; or the sound-absorbing element is installed on the bottom surface of the mounting groove, and the sound-absorbing element and the cover plate form the air inlet channel; or the sound-absorbing element is respectively installed on the inner surface of the cover plate opposite to the bottom surface of the mounting groove and on the bottom surface of the mounting groove, and the sound-absorbing elements arranged opposite to each other form the air inlet channel.

[0015] In one embodiment, the inner surface of the cover plate is provided with multiple diffuse reflection structures.

[0016] In one embodiment, the back of the cover plate is provided with a sealing portion arranged around the periphery of the cover plate; the sealing portion is a protrusion and is integrally formed with the cover plate; or the sealing portion is a sealing strip and is attached to the cover plate.

[0017] In one embodiment, the sound-absorbing element is sound-absorbing cotton, which is polyester fiber cotton, bicomponent cotton, or melamine cotton.

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

[0019] A gas-fired water heater, characterized in that it includes: the noise reduction structure of the gas-fired water heater described above.

[0020] Compared with the prior art, the gas-fired water heater of this utility model has the following advantages: the gas-fired water heater equipped with the above-mentioned noise reduction structure can effectively reduce the noise leaking from the gas-fired water heater and the noise transmitted to the user's ears, thereby improving the user's experience. Attached Figure Description

[0021] 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.

[0022] 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;

[0023] Figure 2 A cross-sectional view and noise distribution diagram of a gas-fired water heater installed on a wall in the prior art;

[0024] Figure 3This is a schematic diagram of the noise reduction structure of a gas-fired water heater according to an embodiment of the present invention;

[0025] Figure 4 for Figure 3 The diagram shows the structural design of the shell.

[0026] Figure 5 for Figure 3 The diagram shows the structure of the cover plate.

[0027] Figure 6 for Figure 5 A magnified view of part A in the middle;

[0028] Figure 7 for Figure 4 The housing and Figure 5 The diagram shows the structure of the cover plate in its assembled state.

[0029] Figure 8 This is a schematic diagram of the noise reduction structure of another gas-fired water heater according to an embodiment of the present invention;

[0030] Figure 9 for Figure 8 An exploded view of the noise reduction structure of the gas-fired water heater shown in the image;

[0031] Figure 10 for Figure 8 A bottom view of the noise reduction structure of the gas-fired water heater shown in the image;

[0032] Figure 11 This is a cross-sectional view of a noise reduction structure of a gas-fired water heater according to an embodiment of the present invention;

[0033] Figure 12 This is a cross-sectional view of the noise reduction structure of another gas-fired water heater according to an embodiment of the present invention.

[0034] Explanation of reference numerals in the attached figures:

[0035] Prior art reference numerals:

[0036] 1' Wall; 3' Gas-fired water heater.

[0037] Reference numerals in the drawings of this utility model:

[0038] 1. Housing; 101. Mounting groove; 1011. Groove bottom; 1012. Inner air inlet; 1013. Groove wall; 1014. Opening; 102. First snap-fit ​​part; 2. Cover plate; 201. Diffuse reflection structure; 202. Second snap-fit ​​part; 2021. First folding plate; 2022. Second folding plate; 203. Sealing part; 3. Sound-absorbing component; 4. Air inlet channel; 5. Outer air inlet. Detailed Implementation

[0039] 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.

[0040] In the description of this application, it should be understood that the terms "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and 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, and therefore should not be construed as a limitation of this application.

[0041] 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.

[0042] 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.

[0043] In related technologies, such as Figure 1 and Figure 2 As shown, the gas water heater 3' is typically installed on the wall 1'. When the gas water heater 3' is in use, some of the noise inside the gas water heater 3' is transmitted through the casing of the gas water heater 3', and another part is diffracted out through the air inlet and air intake channel of the gas water heater 3' in sequence. The noise diffracted from the air intake channel is reflected by the wall 1', and the noise diffracted from the air inlet is directly transmitted to the user's ear after being reflected by the wall 1', resulting in relatively large peripheral noise of the gas water heater 3'.

[0044] It should be noted that the main noise sources of the gas-fired water heater 3' are the combustion system and the fan system. The noise frequency is concentrated in the low-to-medium frequency range of 300 to 1000 Hz. The noise sound waves are relatively long and have strong diffraction capabilities. There is also high-frequency noise above 1000 Hz.

[0045] The gas water heater 3' has a reverberant sound field inside its casing, with sound energy density at various locations approaching equality. Each wall surface of the casing radiates noise outwards. While a cover plate on the back of the gas water heater 3' can alter the direction of noise propagation to some extent, it cannot effectively attenuate noise energy. This is because the noise diffracted from the air inlet inside the gas water heater 3' is transmitted as a plane wave within the back cover plate (a rectangular channel). The amplitude of the plane wave does not attenuate with the length of the rectangular channel. Therefore, regardless of the length of the conventional sound channel, the sound waves diffracted from the air inlet can be diffracted out from the external air inlet without attenuation. The reason the bottom shell of a conventional sound channel has a "noise reduction effect" is because it changes the direction of noise diffraction. Even if the amount of noise reflected forward by the wall is reduced, the leakage noise at the external air inlet still has a significant reflection effect.

[0046] To solve the above technical problems, the following will be combined with... Figures 3 to 12 The following describes embodiments of the present invention.

[0047] It should be noted that the gas-fired water heating equipment mentioned in this embodiment includes, but is not limited to, gas water heaters, wall-mounted boilers, and other equipment that uses the combustion of gas and air to provide hot water.

[0048] According to embodiments of the present invention, such as Figure 3 , Figure 8 and Figure 9 As shown, in a first aspect, a noise reduction structure for a gas-fired water heater (hereinafter referred to as the noise reduction structure for ease of description) is provided, comprising: a housing 1, a cover plate 2, and a sound-absorbing component 3. Along the front-rear direction of the housing 1, the back of the housing 1 is recessed to form a mounting groove 101. The bottom surface 1011 of the mounting groove 101 is provided with an inner air inlet 1012 communicating with the interior of the housing 1. The cover plate 2 covers the opening of the mounting groove 101 to form an air inlet space, and the sound-absorbing component 3 is located in the air inlet space. An air inlet channel 4 is formed between the mounting groove 101 and the cover plate 2. An outer air inlet 5 is provided on the housing 1 and / or the cover plate 2, and the outer air inlet 5 is connected to the inner air inlet 1012 through the air inlet channel 4.

[0049] When the gas water heater is running, outside air can enter the air intake channel 4 through the outside air inlet 5 and then enter the inner air inlet 1012 along the air intake channel 4. Since there is a sound-absorbing component 3 in the air intake space formed between the cover plate 2 and the mounting groove 101, the noise generated when the outside air flows in the air intake channel 4 can be absorbed by the sound-absorbing component 3, thereby reducing the noise caused by outside air entering the air intake channel 4. In addition, since some of the noise generated by the fan and water pump in the gas water heater will be diffracted out through the inner air inlet 1012 of the gas water heater, this embodiment of the utility model can also absorb the noise diffracted from the inner air inlet 1012 and the air intake channel 4 by setting the sound-absorbing component 3 between the bottom surface 1011 of the mounting groove 101 and the cover plate 2, thereby reducing the noise leaking from the gas water heater and the noise transmitted to the user's ears, and improving the user's experience. Moreover, the mounting groove 101 formed by the recess on the back of the housing 1 in this utility model enables noise to pass through the side wall of the mounting groove 101 and the side wall of the housing 1 in sequence when it propagates along the circumferential direction of the back of the housing 1. This increases the difficulty of noise being transmitted from the side wall of the housing 1 and also consumes the energy of the noise, thereby helping to reduce noise.

[0050] It can be understood that the fan and water pump in the aforementioned gas-fired water heater are installed inside the housing 1 of the noise reduction structure. Furthermore, the mounting groove 101 in this embodiment can be directly formed by stamping the back of the housing 1.

[0051] It should be noted that the back of the housing 1 refers to the side surface of the housing 1 that is close to the wall, the outer surface of the cover plate 2 is the side surface of the cover plate 2 that is close to the wall, and the inner surface of the cover plate 2 is the side surface of the cover plate 2 that is away from the wall.

[0052] It should be further noted that the thickness and density of the sound-absorbing component 3 can be adjusted according to the desired sound absorption effect. Similarly, the sound-absorbing component 3 can be designed as a flat plate, a wave shape, or other specific shapes, as long as the sound-absorbing component 3 has a good sound absorption and noise reduction effect. In the embodiments of this application, no specific limitations are imposed on the thickness and shape of the sound-absorbing component 3.

[0053] In one embodiment, such as Figures 4 to 7As shown, along the width direction of the housing 1, multiple first snap-fit ​​portions 102 are respectively provided on opposite sides of the mounting groove 101 on the back of the housing 1. The multiple first snap-fit ​​portions 102 are spaced apart along the height direction of the housing 1. Multiple second snap-fit ​​portions 202 are provided at corresponding positions on the cover plate 2. The cover plate 2 is snapped together with the first snap-fit ​​portions 102 and the second snap-fit ​​portions 202 and connected to the housing 1 through fasteners. In this embodiment, by setting corresponding snap-fit ​​parts to cooperate between the housing 1 and the cover plate 2, the cover plate 2 can be quickly pre-positioned and installed. The snap-fit ​​structure of the first snap-fit ​​portions 102 and the second snap-fit ​​portions 202 can quickly fix the cover plate 2 initially in the early stage of installation, simplifying the installation process, greatly shortening the installation time, and reducing labor costs. At the same time, the multiple snap-fit ​​parts are spaced apart along the height direction, which can effectively disperse the external force on the cover plate 2, enhance the stability of the connection between the cover plate 2 and the housing 1, and reduce the risk of loosening caused by vibration and collision. In addition, with the cooperation of fasteners for further reinforcement, a double guarantee can be formed, improving the reliability and practicality of the overall structure.

[0054] Specifically, the first latching part 102 is one of a buckle or a latch, and the other is the second latching part 202.

[0055] For example, in one embodiment, the first latching part 102 is a card interface, and the second latching part 202 includes a first folding plate 2021 and a second folding plate 2022. One end of the first folding plate 2021 is connected to the cover plate 2 and is set at an angle to the cover plate 2, and the other end is connected to the second folding plate 2022. The second folding plate 2022 is set parallel to the cover plate 2. When the cover plate 2 and the housing 1 are in a connected state, the second folding plate 2022 passes through the card interface and abuts against the inner surface of the housing 1 away from the cover plate 2.

[0056] Specifically, fasteners can be screws, bolts, or other fastening structures. In this embodiment, no specific restrictions are placed on the type of fastener.

[0057] In one embodiment, along the width direction of the housing 1, the back of the housing 1 is provided with sliding grooves on opposite sides of the mounting groove 101, and the sliding grooves extend along the height direction of the housing 1; the inner surface of the cover plate 2 is provided with a slide rail that slides in cooperation with the sliding groove, and the cover plate 2 is connected to the housing 1 by sliding cooperation with the sliding groove through the slide rail and by fasteners.

[0058] It should be noted that the sliding groove in this embodiment can be formed on the groove wall 1013 of the mounting groove 101 along the width direction of the housing 1, or it can be formed on both sides of the groove opening of the mounting groove 101 along the width direction of the housing 1. The reason for extending the sliding groove along the height direction of the housing 1 is to allow the cover plate 2 to be conveniently inserted or pulled out along the height direction through the opening 1014 of the mounting groove 101 in the height direction of the housing 1, so as to achieve quick installation and disassembly.

[0059] Understandably, by using slides and rails to assemble the cover plate 2 onto the housing 1, pre-positioning of the cover plate 2 and the housing 1 can be achieved, reducing displacement of the cover plate 2 during assembly, lowering assembly difficulty, and improving assembly efficiency. Subsequently, fasteners are used to fix the cover plate 2 and the housing 1, which can improve the connection strength between the cover plate 2 and the housing 1.

[0060] In one embodiment, such as Figure 4 , Figure 7 and Figure 9 As shown, along the height direction of the housing 1, the inner air inlet 1012 is located at the top of the groove bottom surface 1011 of the mounting groove 101, and the outer air inlet 5 is located at the bottom of the housing 1 and / or the cover plate 2.

[0061] In this embodiment of the invention, the inner air inlet 1012 is located at the top of the bottom surface 1011 of the mounting groove 101, while the outer air inlet 5 is located at the bottom of the housing 1 and / or the cover plate 2. The distance between the inner air inlet 1012 and the outer air inlet 5 is as long as possible, so that the noise generated by the gas water heater in the housing 1 enters the air intake channel 4 through the inner air inlet 1012 and then needs to travel a long path within the air intake channel 4 to reach the outer air inlet 5. Because the distance of the noise sound waves from the inner air inlet 1012 to the outer air inlet is long, the number of times the noise sound waves are reflected by the sound-absorbing component 3 within the air intake channel 4 is increased, thereby improving the noise absorption effect of the sound-absorbing component 3 and effectively reducing the noise generated by the gas water heater during operation, thus reducing the impact of noise on users. Similarly, since noise is generated as outside air flows from the external air inlet to the internal air inlet, this embodiment extends the distance of outside air from the external air inlet 5 to the internal air inlet 1012. This increases the number of times noise is reflected by the sound-absorbing component 3 during the air intake process, reducing the possibility of noise leakage into the external environment. Furthermore, outside air enters the housing 1 through the internal air inlet 1012 at the top of the bottom surface 1011 of the mounting groove 101, and then the airflow flows downwards from the top of the housing 1. During this airflow, effective heat dissipation is achieved for the electrical components of the housing 1.

[0062] It should be noted that the external air inlet 5 can be set in any existing shape, such as rectangular, circular or grille. In this embodiment, there is no specific limitation on the shape of the external air inlet 5.

[0063] It is understandable that the external air inlet 5 can be directly formed on the housing 1, or directly formed on the cover plate 2, or it can be formed by the housing 1 and the cover plate 2 together.

[0064] For example, in one embodiment, such as Figure 3 , Figure 8 , Figure 9 and Figure 10As shown, along the height direction of the housing 1, the bottom of the mounting groove 101 is provided with an opening 1014, and the opening 1014 and the cover plate 2 together form an external air inlet 5.

[0065] In one embodiment, such as Figure 11 and Figure 12 As shown, the sound-absorbing component 3 is installed on the inner surface of the cover plate 2 opposite to the bottom surface 1011 of the mounting groove 101, forming an air intake channel 4 between the sound-absorbing component 3 and the bottom surface 1011 of the mounting groove 101; or the sound-absorbing component 3 is installed on the bottom surface 1011 of the mounting groove 101, forming an air intake channel 4 between the sound-absorbing component 3 and the cover plate 2; or the sound-absorbing component 3 is installed on the inner surface of the cover plate 2 opposite to the bottom surface 1011 of the mounting groove 101 and on the bottom surface 1011 of the mounting groove 101, forming an air intake channel 4 between the oppositely arranged sound-absorbing components 3.

[0066] It should be noted that when the sound-absorbing component 3 is installed on the bottom surface 1011 of the mounting groove 101, the sound-absorbing component 3 can be arranged in the following two ways. First, along the height direction of the housing 1, the sound-absorbing component 3 is spaced apart from the inner air inlet 1012 on the bottom surface 1011, thereby avoiding obstruction of the air intake by the sound-absorbing component 3 and ensuring smooth airflow. Second, the sound-absorbing component 3 completely covers the surface of the bottom surface 1011, but a flow channel is provided at the position opposite to the inner air inlet 1012 to facilitate the flow of external air. The size and shape of the flow channel can be adjusted adaptively according to design requirements. For example, the flow channel can be a flow hole or a flow opening.

[0067] Understandably, due to the influence of the inner air inlet 1012, when the sound-absorbing component 3 is installed on the cover plate 2, compared to installing the sound-absorbing component 3 on the bottom surface 1011 of the mounting groove 101, the sound-absorbing component 3 is relatively larger, and therefore the sound absorption effect is better.

[0068] In one embodiment, such as Figure 12 As shown, the sound-absorbing component 3 is fixed to the inner surface of the cover plate 2 by adhesive bonding. In this embodiment, the sound-absorbing component 3 is tightly attached to the inner surface of the cover plate 2 by adhesive bonding, so that the sound-absorbing component 3 can be firmly installed on the cover plate 2, improving the stability of the noise reduction structure, helping to maintain air circulation inside the air intake channel 4, and ensuring combustion efficiency.

[0069] Specifically, the sound-absorbing component 3 can be bonded to the inner surface of the cover plate 2 with an adhesive. For example, the adhesive can be double-sided tape, high-temperature resistant or waterproof water-based adhesive, etc. The sound-absorbing component 3 can also be bonded to the inner wall surface of the cover plate 2 by hot melt adhesive or Velcro. In this embodiment, the bonding method of the sound-absorbing component 3 is not specifically limited.

[0070] In one embodiment, such as Figures 8 to 12As shown, the inner surface of the cover plate 2 is provided with multiple diffuse reflection structures 201, and the sound-absorbing component 3 covers the multiple diffuse reflection structures 201. In this embodiment, the multiple diffuse reflection structures 201 on the inner surface of the cover plate 2 enable noise to undergo diffuse reflection when passing through them. The continuous mutual reflection of noise by the diffuse reflection structures 201 causes it to enter the sound-absorbing component 3 in different directions, extending the attenuation path of the sound wave and further attenuating the noise, thereby improving the noise reduction effect. Furthermore, since the area of ​​the diffuse reflection structure 201 on the cover plate 2 is matched with the coverage area of ​​the sound-absorbing component 3, the probability of noise undergoing diffuse reflection through the diffuse reflection structure 201 is increased, further attenuating the noise and improving the noise reduction effect.

[0071] It should be noted that the embodiments of this application do not limit the diffuse reflection structure 201, and any existing structure can be selected as needed. For example, in this embodiment, the diffuse reflection structure 201 can be a plurality of stamped protrusions, which can be disposed towards the housing 1 or towards the wall.

[0072] Due to manufacturing errors and / or wall surface roughness, a certain gap will always be formed between the cover plate 2 of the noise reduction structure and the wall in the assembled state. Therefore, noise will be transmitted to the user's ears through this gap, affecting the user's experience.

[0073] Based on this, in one embodiment, such as Figure 8 and Figure 9 As shown, a sealing portion 203 is provided on the back of the cover plate 2 around its periphery. With the help of the sealing portion 203, a sealed cavity can be formed between the cover plate 2 and the cavity. In this way, noise reflected by the wall will be isolated in the sealed cavity, thereby reducing the amount of noise transmitted to the external environment.

[0074] In one embodiment, the sealing part 203 is a protrusion integrally formed with the cover plate 2; or the sealing part 203 is a sealing strip, which is attached to the cover plate 2. It is understood that using a protrusion integrally formed with the cover plate 2 for the sealing part 203 avoids additional assembly steps, effectively simplifies the production process, reduces errors caused by assembling multiple parts, and ensures the durability and stability of the sealing performance, reducing the risk of seal failure. Using a sealing strip as the sealing part 203 provides greater flexibility and adaptability, facilitating quick replacement and adjustment for different cover plates 2, and also simplifying later maintenance and repair.

[0075] It should be noted that the sealing strip material in this embodiment may be, but is not limited to, rubber, silicone, or ethylene-vinyl acetate copolymer (EVA).

[0076] In one embodiment, the sound-absorbing component 3 is sound-absorbing cotton, which is made of polyester fiber cotton, bicomponent cotton, or melamine cotton.

[0077] The sound-absorbing component 3 is made of polyester fiber cotton, which has a good sound absorption effect and can effectively absorb mid-to-high frequency sounds.

[0078] The sound-absorbing component 3 uses two-component cotton, which can provide better structural stability. The combination of different densities helps to absorb sound over a wider frequency range and generally has good resistance to compression deformation, maintaining long-term sound absorption performance.

[0079] The sound-absorbing component 3 is made of melamine cotton, which is suitable for use in high-temperature environments and can provide good sound absorption, especially in the absorption of high-frequency noise.

[0080] Specifically, the material of the sound-absorbing component 3 can be customized according to the specific application environment and noise reduction requirements of the noise reduction structure to achieve the best sound absorption effect and durability. In this embodiment, no specific limitations are imposed on the material of the sound-absorbing component 3.

[0081] Specifically, two-component cotton can be made of polypropylene (PP) and polyethylene terephthalate (PET).

[0082] According to an embodiment of this utility model, another aspect provides a gas water heater, including the aforementioned noise reduction structure for a gas water heater. It is understood that a gas water heater equipped with the aforementioned noise reduction structure can effectively reduce noise leakage from the gas water heater and noise transmitted to the user's ears, thereby improving the user's experience.

[0083] 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.

[0084] 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 noise reduction structure for a gas-fired water heater, characterized in that, include: The housing (1), cover plate (2), and sound-absorbing component (3) are arranged in a front-rear direction. The back of the housing (1) is recessed to form a mounting groove (101). The bottom surface (1011) of the mounting groove (1011) is provided with an inner air inlet (1012) that communicates with the interior of the housing (1). The cover plate (2) covers the opening of the mounting groove (101) to form an air intake space. The sound-absorbing component (3) is located in the air intake space. An air intake channel (4) is provided between the mounting groove (101) and the cover plate (2). An outer air inlet (5) is provided on the housing (1) and / or the cover plate (2). The outer air inlet (5) communicates with the inner air inlet (1012) through the air intake channel (4).

2. The noise reduction structure of the gas-fired water heater according to claim 1, characterized in that: Along the width direction of the housing (1), a plurality of first snap-fit ​​portions (102) are provided on the back side of the housing (1) on opposite sides of the mounting groove (101), and the plurality of first snap-fit ​​portions (102) are spaced apart along the height direction of the housing (1); a plurality of second snap-fit ​​portions (202) are provided at corresponding positions on the cover plate (2); the cover plate (2) is snapped with the second snap-fit ​​portions (202) through the first snap-fit ​​portions (102) and connected to the housing (1) through fasteners.

3. The noise reduction structure of the gas-fired water heater according to claim 2, characterized in that: The first snap-fit ​​part (102) is a snap-fit ​​interface, and the second snap-fit ​​part (202) includes a first folding plate (2021) and a second folding plate (2022). One end of the first folding plate (2021) is connected to the cover plate (2) and is set at an angle to the cover plate (2), and the other end is connected to the second folding plate (2022). The second folding plate (2022) is set parallel to the cover plate (2). When the cover plate (2) and the housing (1) are in a connected state, the second folding plate (2022) passes through the snap-fit ​​interface and abuts against the inner surface of the housing (1).

4. The noise reduction structure of the gas-fired water heater according to claim 1, characterized in that: Along the height direction of the housing (1), the inner air inlet (1012) is located at the top of the groove bottom surface (1011) of the mounting groove (101), and the outer air inlet (5) is located at the bottom of the housing (1) and / or the cover plate (2).

5. The noise reduction structure of the gas-fired water heater according to claim 4, characterized in that: Along the height direction of the housing (1), the bottom of the mounting groove (101) is provided with an opening (1014), and the opening (1014) and the cover plate (2) together form the external air inlet (5).

6. The noise reduction structure of the gas-fired water heater according to claim 1, characterized in that: The sound-absorbing component (3) is installed on the inner surface of the cover plate (2) opposite to the bottom surface (1011) of the mounting groove (101), and the sound-absorbing component (3) and the bottom surface (1011) of the mounting groove (101) form the air intake channel (4); or the sound-absorbing component (3) is installed on the bottom surface (1011) of the mounting groove (101), and the sound-absorbing component (3) and the cover plate (2) form the air intake channel (4); or the sound-absorbing component (3) is installed on the inner surface of the cover plate (2) opposite to the bottom surface (1011) of the mounting groove (101) and the bottom surface (1011) of the mounting groove (101), and the sound-absorbing component (3) opposite to each other forms the air intake channel (4).

7. The noise reduction structure of the gas-fired water heater according to claim 1, characterized in that: The inner surface of the cover plate (2) is provided with multiple diffuse reflection structures (201).

8. The noise reduction structure of the gas-fired water heater according to any one of claims 1 to 7, characterized in that: The back of the cover plate (2) is provided with a sealing part (203) arranged around the periphery of the cover plate (2); The sealing part (203) is a protrusion, which is integrally formed with the cover plate (2); or the sealing part (203) is a sealing strip, which is pasted on the cover plate (2).

9. The noise reduction structure of the gas-fired water heater according to any one of claims 1 to 7, characterized in that: The sound-absorbing component (3) is sound-absorbing cotton, which is polyester fiber cotton, bicomponent cotton or melamine cotton.

10. A gas-fired hot water device, characterized in that, include: The noise reduction structure of the gas-fired water heater according to any one of claims 1 to 9.

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