A noise reduction structure and a gas water heater

Abstract

This utility model belongs to the field of household appliance technology, specifically disclosing a noise reduction structure and a gas water heater. The noise reduction structure includes a bottom shell, a back plate, and sound-absorbing cotton. The bottom shell has ventilation holes. The back plate is disposed on the bottom shell, and an air inlet channel is formed between the back plate and the bottom shell. The air inlet channel includes a first air duct section and a second air duct section connected sequentially along the length of the bottom shell. The dimension of the first air duct section along the thickness of the bottom shell is larger than the dimension of the second air duct section along the thickness of the bottom shell, and the first air duct section is connected to the ventilation holes. The end of the second air duct section away from the first air duct section has an air inlet. The sound-absorbing cotton is disposed inside the first air duct section and fixed to the back plate. The noise reduction structure provided by this utility model effectively reduces costs, improves airflow smoothness, and has a good noise reduction effect.

Description

Technical Field

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

[0002] As people's living standards improve, users are paying more and more attention to the user experience of products. Currently, gas water heaters generally have noise problems, which mainly include combustion noise, fan noise, vaporization noise in the heat exchange system, airflow turbulence noise, and water pump vibration noise.

[0003] In related technologies, sound insulation and noise reduction methods are usually used to reduce the noise of gas water heaters. For example, a sound-absorbing component is installed on the air intake channel of the gas water heater shell. However, since the sound-absorbing component is often complex in structure, the cost of sound insulation and noise reduction is high. In addition, the sound-absorbing component distributed on the air intake channel will obstruct the air intake to a certain extent, affecting the smoothness of the air intake. Utility Model Content

[0004] One of the technical problems solved by this utility model is to provide a noise reduction structure that can ensure noise reduction effect and smooth air intake while controlling costs.

[0005] The above-mentioned technical problems are solved by the following technical solutions:

[0006] A noise reduction structure, comprising:

[0007] The bottom shell is provided with ventilation holes;

[0008] A back plate is disposed on the bottom shell and forms an air inlet channel between it and the bottom shell. The air inlet channel includes a first air duct section and a second air duct section that are sequentially connected along the length direction of the bottom shell. The dimension of the first air duct section along the thickness direction of the bottom shell is larger than the dimension of the second air duct section along the thickness direction of the bottom shell. The first air duct section is connected to the ventilation hole. The end of the second air duct section away from the first air duct section has an air inlet.

[0009] The sound-absorbing cotton is placed inside the first air duct section and fixed to the back plate.

[0010] The noise reduction structure described in this utility model has the following advantages compared with the prior art:

[0011] During use, noise from inside the bottom shell can enter the air intake channel through the ventilation holes and propagate to the outside of the air intake channel through the air inlet. Air can also enter the air intake channel through the air inlet and then enter the interior of the bottom shell through the ventilation holes. When noise propagates within the air intake channel, it is reflected and loses energy in both the first and second air duct sections. Furthermore, the noise comes into contact with the sound-absorbing cotton in the first air duct section, and some of its energy is absorbed by the cotton. Therefore, the noise reduction structure has a good noise reduction effect. In addition, this noise reduction structure only uses sound-absorbing cotton in the first air duct section, effectively reducing costs. The dimension of the first air duct section along the thickness direction of the bottom shell is larger than that of the second air duct section along the thickness direction of the bottom shell, effectively reducing the interference of the sound-absorbing cotton on the airflow within the air intake channel and ensuring smooth airflow.

[0012] In one embodiment, the bottom shell includes a bottom plate, the bottom plate having a first protrusion on the outer side of the bottom shell, the first protrusion forming a second air duct between the first protrusion and the back plate; or, the back plate having a protrusion on the inner side, the protrusion forming a second air duct between the protrusion and the bottom shell.

[0013] In one embodiment, the first convex portion has a first inclined plate on the side near the first air duct portion.

[0014] In one embodiment, the base plate has a second protrusion on the outer side of the bottom shell; along the length direction of the bottom shell, the second protrusion is spaced apart from the back plate, and at least a portion of the projection of the second protrusion is located within the air inlet channel.

[0015] In one embodiment, the air inlet channel further includes a third air duct section. Along the length of the bottom shell, the first air duct section, the second air duct section, and the third air duct section are connected in sequence, and the air inlet is located at the end of the third air duct section away from the second air duct section.

[0016] Wherein, the dimension of the third air duct portion along the thickness direction of the bottom shell is greater than the dimension of the second air duct portion along the thickness direction of the bottom shell; and / or, the dimension of the third air duct portion along the thickness direction of the bottom shell is greater than or equal to the dimension of the first air duct portion along the thickness direction of the bottom shell.

[0017] In one embodiment, the bottom shell is provided with a plurality of ventilation holes, and at least a portion of the projections of the ventilation holes are located on the sound-absorbing cotton along the thickness direction of the bottom shell.

[0018] In one embodiment, the noise reduction structure further includes a bracket disposed within the first air duct section, and the sound-absorbing cotton is sandwiched between the bracket and the back plate.

[0019] In one embodiment, the bracket has a limiting portion on the side facing the bottom shell, and the limiting portion abuts against the bottom shell.

[0020] In one embodiment, the bracket includes a rectangular frame, within which are arranged a plurality of vertical strips and a plurality of horizontal strips in a crisscross pattern. A plurality of noise reduction holes are formed between the rectangular frame, the vertical strips, and the horizontal strips. The vertical strips are provided with limiting portions, and the limiting portions of one of the two adjacent vertical strips are offset from the limiting portions of the other along the length direction of the horizontal strip.

[0021] In one embodiment, the outer edge of the bracket is provided with a rim, and the sound-absorbing cotton is disposed within the rim.

[0022] In one embodiment, the dimension of the sound-absorbing cotton along the length of the bottom shell is 1 / 3 to 1 / 2 of the dimension of the air inlet channel along the length of the bottom shell.

[0023] The second technical problem solved by this utility model is to provide a gas water heater that can control costs while ensuring noise reduction and smooth air intake.

[0024] The above-mentioned technical problems are solved by the following technical solutions:

[0025] A gas water heater includes the aforementioned noise reduction structure.

[0026] The gas water heater described in this utility model has the following advantages compared with the prior art:

[0027] The noise generated by the operation of the gas water heater will enter the air intake channel through the ventilation holes and then be transmitted to the outside of the air intake channel through the air inlet. Air can enter the air intake channel through the air inlet and then enter the bottom shell through the ventilation holes. The noise reduction structure only sets sound-absorbing cotton in the first air duct section, which can effectively reduce the noise level transmitted from the air inlet to the outside of the air intake channel, ensure smooth air intake, and effectively reduce costs. Attached Figure Description

[0028] Figure 1 A cross-sectional view of the noise reduction structure provided by this utility model;

[0029] Figure 2 Provided by this utility model Figure 1 Enlarged view of the structure at point A in the middle;

[0030] Figure 3 A partial sectional view of the bottom shell provided by this utility model;

[0031] Figure 4 A schematic diagram of the noise reduction structure provided by this utility model;

[0032] Figure 5 A partial structural schematic diagram of the noise reduction structure provided by this utility model;

[0033] Figure 6 Exploded view of part of the noise reduction structure provided by this utility model;

[0034] Figure 7 A schematic diagram of the structure of the bracket provided by this utility model;

[0035] Figure 8 An exploded view of the structure of the gas water heater provided by this utility model.

[0036] Label Explanation:

[0037] 100. Bottom shell; 101. Ventilation hole; 110. Bottom plate; 111. First recessed portion; 112. First convex portion; 113. First inclined plate; 114. Second recessed portion; 115. Second inclined plate; 116. Second convex portion;

[0038] 200. Back panel; 201. Connecting part; 210. Air inlet channel; 211. First air duct section; 212. Second air duct section; 213. Air inlet; 214. Third air duct section;

[0039] 310. Bracket; 311. Limiting part; 312. Rectangular frame; 3121. Horizontal frame strip; 313. Vertical strip; 3131. First vertical strip; 3132. Second vertical strip; 314. Horizontal strip; 315. Noise reduction hole; 316. Support protrusion; 317. Edge; 320. Sound-absorbing cotton; 321. Groove. Detailed Implementation

[0040] 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.

[0041] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "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.

[0042] 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.

[0043] 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.

[0044] Reference Figures 1 to 6 As shown, this embodiment provides a noise reduction structure, which includes a bottom shell 100, a back plate 200, and sound-absorbing cotton 320.

[0045] Specifically, the bottom shell 100 is provided with ventilation holes 101; the back plate 200 is disposed on the bottom shell 100, and an air inlet channel 210 is formed between the back plate 200 and the bottom shell 100. The air inlet channel 210 includes a first air duct portion 211 and a second air duct portion 212 connected sequentially along the length direction of the bottom shell 100. The dimension H1 of the first air duct portion 211 along the thickness direction of the bottom shell 100 is larger than the dimension H2 of the second air duct portion 212 along the thickness direction of the bottom shell 100. The first air duct portion 211 is connected to the ventilation holes 101, and the end of the second air duct portion 212 away from the first air duct portion 211 has an air inlet 213; sound-absorbing cotton 320 is disposed in the first air duct portion 211 and fixed to the back plate 200. The length direction of the bottom shell 100 is... Figure 1 The length direction of the bottom shell 100 is [missing information], and the thickness direction of the bottom shell 100 is [missing information]. Figure 1 The thickness direction of the bottom shell 100. For example, the length direction of the bottom shell 100 can be the vertical direction of the noise reduction structure, and the thickness direction of the bottom shell 100 can be the front-back direction of the noise reduction structure.

[0046] When in use, noise inside the bottom shell 100 can enter the air intake channel 210 through the ventilation hole 101 and propagate to the outside of the air intake channel 210 through the air inlet 213. Air can enter the air intake channel 210 through the air inlet 213 and enter the interior of the bottom shell 100 through the ventilation hole 101. When noise propagates in the air intake channel 210, the noise will be reflected and lose energy in both the first air duct section 211 and the second air duct section 212. The noise will come into contact with the sound-absorbing cotton 320 in the first air duct section 211 and be partially absorbed by the sound-absorbing cotton 320. Therefore, the noise reduction structure has a good noise reduction effect. In addition, the noise reduction structure only sets the sound-absorbing cotton 320 in the first air duct section 211, which effectively reduces the cost. Moreover, the dimension H1 of the first air duct section 211 along the thickness direction of the bottom shell 100 is larger than the dimension H2 of the second air duct section 212 along the thickness direction of the bottom shell 100, which effectively reduces the interference of the sound-absorbing cotton 320 on the airflow in the air inlet channel 210 and ensures the smooth air intake of the air inlet channel 210.

[0047] It is understandable that, since the energy of noise in the first air duct section 211 is higher than that in the second air duct section 212, the sound-absorbing cotton 320 placed in the first air duct section 211 can absorb more noise energy and achieve a better noise reduction effect compared to placing the sound-absorbing cotton 320 in the second air duct section 212.

[0048] In one feasible implementation, the bottom shell 100 may be provided with a plurality of ventilation holes 101. Along the thickness direction of the bottom shell 100, at least some of the projections of the ventilation holes 101 are located on the sound-absorbing cotton 320, so as to ensure that at least some of the noise entering the air intake channel 210 through the ventilation holes 101 can come into contact with the sound-absorbing cotton 320 and have some of its energy absorbed by the sound-absorbing cotton 320, so that the noise reduction structure has a good noise reduction effect. In addition, the arrangement of multiple ventilation holes 101 can ensure that the gas water heater with noise reduction structure has sufficient oxygen supply during operation. Exemplarily, the multiple ventilation holes 101 can be arranged in a matrix.

[0049] In one feasible implementation, such as Figure 1 As shown, the dimension L1 of the sound-absorbing cotton 320 along the length of the bottom shell 100 is 1 / 3 to 1 / 2 of the dimension L2 of the air inlet channel 210 along the length of the bottom shell 100. This ensures good noise reduction effect of the noise reduction structure while guaranteeing smooth air intake of the air inlet channel 210, and also reduces costs. Of course, the ratio of the dimension L1 of the sound-absorbing cotton 320 along the length of the bottom shell 100 to the dimension L2 of the air inlet channel 210 along the length of the bottom shell 100 can also be other numerical ranges, which are not limited in this embodiment.

[0050] In some embodiments, refer to Figures 1 to 3As shown, the bottom shell 100 includes a bottom plate 110. A first protrusion 112 is provided on the outer side of the bottom plate 110, forming a second air duct 212 between the first protrusion 112 and the back plate 200. It can be understood that a first recess 111 is formed on the side of the bottom plate 110 away from the air inlet 213 of the first protrusion 112, forming the first air duct 211 between the first recess 111 and the back plate 200. In this embodiment, the first protrusion 112 facilitates the molding of the bottom shell 100, resulting in a compact structure. Furthermore, the recess formed by the first protrusion 112 within the bottom shell 100 creates clearance space, facilitating the structural layout within the bottom shell 100. In addition, the first protrusion 112, in conjunction with the sound-absorbing cotton 320, can alter the direction of noise propagation, blocking some noise from propagating towards the second air duct 212. The blocked noise is also partially absorbed again by the sound-absorbing cotton 320 after reflection, further reducing the noise level.

[0051] For example, the first convex portion 112 can be stepped, that is, the first convex portion 112 includes at least two parallel end faces, and one of the two adjacent end faces closer to the first air duct portion 211 protrudes beyond the other in the air inlet channel 210, effectively ensuring the smooth air intake of the air inlet channel 210, and reducing the generation of high-frequency noise by diffusing noise from a smaller space to a larger space. Of course, the first convex portion 112 can also be in other shapes, which is not limited in this embodiment.

[0052] For example, the first convex portion 112 has a first inclined plate 113 on the side near the first air duct portion 211. The first inclined plate 113 can reflect noise toward the first air duct portion 211 and can give way to the sound-absorbing cotton 320, so that the air inlet channel 210 has a good ventilation effect at the first inclined plate 113, effectively ensuring the smooth air intake of the air inlet channel 210.

[0053] It is understandable that, along the thickness direction of the bottom shell 100, the projection of the sound-absorbing cotton 320 is completely located within the first recess 111, so that the noise reduction structure has a good noise reduction effect and ensures smooth air intake of the air intake channel 210. Preferably, along the thickness direction of the bottom shell 100, the projection of the edge of the sound-absorbing cotton 320 near the second air duct 212 coincides with the edge of the first inclined plate 113 near the first air duct 211, so as to ensure that the noise entering the air intake channel 210 through the ventilation hole 101 can come into contact with the sound-absorbing cotton 320 and have some of its energy absorbed by the sound-absorbing cotton 320.

[0054] In one feasible method, the air inlet channel 210 also includes a third air duct section 214. Along the length of the bottom shell 100, the first air duct section 211, the second air duct section 212 and the third air duct section 214 are connected in sequence, and the air inlet 213 is located at the end of the third air duct section 214 away from the second air duct section 212.

[0055] In one feasible implementation, the dimension H3 of the third air duct 214 along the thickness direction of the bottom shell 100 is greater than the dimension H2 of the second air duct 212 along the thickness direction of the bottom shell 100, which effectively ensures the smooth air intake of the air intake channel 210, and the noise is diffused from the smaller space of the second air duct 212 to the larger space of the third air duct 214, which can reduce the generation of high-frequency noise.

[0056] In one feasible implementation, the dimension H3 of the third air duct portion 214 along the thickness direction of the bottom shell 100 is greater than or equal to the dimension H1 of the first air duct portion 211 along the thickness direction of the bottom shell 100, so as to ensure the smooth air intake of the air intake channel 210. Of course, the dimension H3 of the third air duct portion 214 along the thickness direction of the bottom shell 100 can also be smaller than the dimension H1 of the first air duct portion 211 along the thickness direction of the bottom shell 100, and this embodiment does not limit it.

[0057] In one feasible embodiment, the bottom plate 110 has a second recess 114 formed on the side of the first convex portion 112 away from the first air duct portion 211, and a third air duct portion 214 is formed between the second recess 114 and the back plate 200, which facilitates the molding of the bottom shell 100 and makes the structure compact.

[0058] In one feasible implementation, the first convex portion 112 has a second inclined plate 115 on the side away from the first air duct portion 211. The second inclined plate 115 can guide the flow of air in, effectively ensuring the smooth air intake of the air intake channel 210.

[0059] For example, sound-absorbing cotton 320 can also be installed in the third air duct section 214 to achieve better noise reduction effect.

[0060] In some other embodiments, the inner side of the back plate 200 is provided with a protrusion (not shown), and a second air duct 212 is formed between the protrusion and the bottom shell 100. It can be understood that the air inlet channel 210 narrows at the protrusion so that the air inlet channel 210 forms a first air duct 211, a second air duct 212 and a third air duct 214 connected in sequence. The dimensions of the first air duct 211 and the third air duct 214 along the thickness direction of the bottom shell 100 are both larger than the dimension of the second air duct 212 along the thickness direction of the bottom shell 100, which effectively ensures the noise reduction effect of the noise reduction structure and the smoothness of air intake.

[0061] In one feasible implementation, such as Figure 1 and Figure 4As shown, the base plate 110 has a second protrusion 116 on the outer side of the base shell 100; along the length of the base shell 100, the second protrusion 116 is spaced apart from the back plate 200, and at least a portion of the projection of the second protrusion 116 is located within the air inlet channel 210. The second protrusion 116 can change the direction of noise propagation, and noise loses energy upon reflection after contacting the second protrusion 116, further reducing the noise level. Furthermore, the second protrusion 116 forms a recess within the base shell 100, facilitating the structural layout within the base shell 100.

[0062] For example, taking the bottom plate 110 having a first convex portion 112 and a second convex portion 116 on the outer side of the bottom shell 100 as an example, a second recess 114 is formed between the first convex portion 112 and the second convex portion 116.

[0063] In this embodiment, reference is made to Figure 1 , Figures 5 to 7 As shown, the noise reduction structure also includes a bracket 310, which is located inside the first air duct section 211. The sound-absorbing cotton 320 is sandwiched between the bracket 310 and the back plate 200 to fix the sound-absorbing cotton 320 relative to the back plate 200 and to facilitate the assembly of the sound-absorbing cotton 320 onto the back plate 200.

[0064] In one feasible implementation, the bracket 310 has a limiting part 311 on the side facing the bottom shell 100. The limiting part 311 abuts against the bottom shell 100, maintaining a stable structural shape for the bracket 310. This allows the bracket 310 to stably press the sound-absorbing cotton 320 against the back plate 200, resulting in a tight fit between the sound-absorbing cotton 320 and the back plate 200, providing excellent noise reduction and silencing effects. Furthermore, the stable structural shape of the bracket 310 ensures that the first air duct section 211 has ample passage space, which is beneficial for noise reduction and ventilation.

[0065] For example, the limiting part 311 is provided with multiple parts, so that the sound-absorbing cotton 320 and the back plate 200 are tightly fitted by the average squeezing force of the bracket 310 on the sound-absorbing cotton 320.

[0066] In one feasible embodiment, the support 310 includes a rectangular frame 312, within which are arranged a plurality of intersecting vertical strips 313 and a plurality of horizontal strips 314. A plurality of noise-reducing holes 315 are formed between the rectangular frame 312, the vertical strips 313, and the horizontal strips 314. Each vertical strip 313 has a limiting portion 311, and the limiting portion 311 of one of every two adjacent vertical strips 313 is offset from the limiting portion 311 of the other along the length direction of the horizontal strip 314. In this embodiment, noise can be absorbed by the sound-absorbing cotton 320 through the noise-reducing holes 315. The intersecting vertical strips 313 and horizontal strips 314 provide good structural strength to the support 310. Combined with the structure where the limiting portion 311 of one of every two adjacent vertical strips 313 is offset from the limiting portion 311 of the other along the length direction of the horizontal strip 314, the support 310 can maintain a stable structural shape.

[0067] For example, the length direction of the vertical strip 313 can be the vertical direction of the noise reduction structure, and the length direction of the horizontal strip 314 can be the horizontal direction of the noise reduction structure.

[0068] In one feasible implementation, the limiting portion 311 is provided as a flange, and the vertical strip 313 is provided with at least one pair of limiting portions 311 to maintain the stable structural shape of the bracket 310 and facilitate the molding and manufacturing of the bracket 310. It is understood that each pair of limiting portions 311 includes two limiting portions 311 disposed opposite to each other on both sides of the width direction of the vertical strip 313.

[0069] For example, the bracket 310 includes three vertical strips 313 and two horizontal strips 314. The three vertical strips 313 are respectively configured as one first vertical strip 3131 and two second vertical strips 3132, with the first vertical strip 3131 located between the two second vertical strips 3132. The first vertical strip 3131 has a pair of limiting portions 311, which are located between the two horizontal strips 314. The second vertical strip 3132 has two pairs of limiting portions 311 along its length, and the two horizontal strips 314 are located between the two pairs of limiting portions 311 along the length of the second vertical strip 3132. This structure is simple, can evenly distribute the pressure of the bracket 310 on the sound-absorbing cotton 320, and can maintain a stable structural shape for the bracket 310. Of course, the number and layout of the vertical strips 313 and horizontal strips 314, as well as the limiting parts 311, can be in other forms, and this embodiment does not limit them.

[0070] In one feasible embodiment, the bracket 310 is provided with a support protrusion 316, which abuts against the sound-absorbing cotton 320, so that the sound-absorbing cotton 320 is stably clamped between the back plate 200 and the bracket 310, and can improve the structural strength of the bracket 310 and prevent the bracket 310 from deforming. The support protrusion 316 has a concave-convex structure towards the air inlet channel 210, which facilitates the molding and manufacturing of the bracket 310.

[0071] For example, at least some of the intersections of the multiple vertical strips 313 and multiple horizontal strips 314 are provided with support protrusions 316, and the support protrusions 316 are cross-shaped, so as to improve the structural strength of the bracket 310 and facilitate the molding and manufacturing of the bracket 310.

[0072] In one feasible implementation, the outer edge of the bracket 310 is provided with a perimeter 317, and the sound-absorbing cotton 320 is disposed within the perimeter 317 to position and assemble the sound-absorbing cotton 320, effectively preventing the sound-absorbing cotton 320 from tilting or moving and affecting the noise reduction effect. Exemplarily, the perimeter 317 can be composed of multiple flanges or a single annular flange; this embodiment is not limited to this.

[0073] In one feasible implementation, the noise reduction structure further includes fasteners (not shown) that pass through the bracket 310 and are threadedly connected to the back plate 200 to achieve stable and reliable assembly between the back plate 200, the bracket 310 and the sound-absorbing cotton 320.

[0074] For example, the back panel 200 is provided with a connecting portion 201 protruding towards the bottom shell 100. The connecting portion 201 abuts against the bracket 310, and the fastener is threadedly connected to the connecting portion 201. To ensure a compact noise reduction structure, a groove 321 can be provided at the edge of the sound-absorbing cotton 320 to accommodate the connecting portion 201. The connecting portion 201 can have a structure that protrudes inward and recedes outward towards the air inlet channel 210.

[0075] For example, the noise reduction structure includes two fasteners, which correspond to the two horizontal frame strips 3121 of the rectangular frame 312, that is, the fasteners pass through the corresponding horizontal frame strips 3121. The connecting portion 201 corresponds one-to-one with the fastener. Of course, the number of fasteners can also be other than specified in this embodiment.

[0076] For example, the back plate 200 and the bottom shell 100 can be connected by bolts.

[0077] Reference Figure 8As shown, this embodiment also provides a gas water heater, which includes the noise reduction structure described above. In this embodiment, the noise generated by the operation of the gas water heater enters the air intake channel 210 through the ventilation hole 101 and is propagated to the outside of the air intake channel 210 through the air inlet 213. Air can enter the air intake channel 210 through the air inlet 213 and enter the interior of the bottom shell 100 through the ventilation hole 101. The noise reduction structure only sets the sound-absorbing cotton 320 in the first air duct 211, which can effectively reduce the noise level propagated from the air inlet 213 to the outside of the air intake channel 210, ensure smooth air intake, and effectively reduce costs.

[0078] 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.

[0079] 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 modifications and improvements 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, characterized by, The application relates to a bottom shell (100) provided with a ventilation hole (101); a back plate (200) arranged on the bottom shell (100) and forming an air inlet channel (210) with the bottom shell (100), the air inlet channel (210) comprising a first air duct part (211) and a second air duct part (212) sequentially communicated along the length direction of the bottom shell (100), the size of the first air duct part (211) along the thickness direction of the bottom shell (100) is larger than the size of the second air duct part (212) along the thickness direction of the bottom shell (100), the first air duct part (211) is arranged in communication with the ventilation hole (101), and the second air duct part (212) is provided with an air inlet (213) at the end away from the first air duct part (211); and sound-absorbing cotton (320) arranged in the first air duct part (211) and fixed on the back plate (200). The bottom shell (100) comprises a bottom plate (110) provided with a first convex part (112) on the outer side of the bottom shell (100), and the first convex part (112) and the back plate (200) form the second air duct part (212); or the inner side of the back plate (200) is provided with a convex part, and the convex part and the bottom shell (100) form the second air duct part (212). The first convex part (112) is provided with a first inclined plate (113) on the side close to the first air duct part (211). The bottom plate (110) is provided with a second convex part (116) on the outer side of the bottom shell (100); along the length direction of the bottom shell (100), the second convex part (116) is spaced apart from the back plate (200), and at least part of the projection of the second convex part (116) is located in the air inlet channel (210).

2. The noise reduction structure of claim 1, wherein, The air inlet channel (210) further comprises a third air duct part (214), the first air duct part (211), the second air duct part (212) and the third air duct part (214) are sequentially communicated along the length direction of the bottom shell (100), and the air inlet (213) is arranged at the end of the third air duct part (214) away from the second air duct part (212).

3. The noise reduction structure of claim 2, wherein, The size of the third air duct part (214) along the thickness direction of the bottom shell (100) is larger than the size of the first air duct part (211) along the thickness direction of the bottom shell.

4. The noise reduction structure of claim 2, wherein, The bottom shell (100) is provided with a plurality of ventilation holes (101), and the projections of at least part of the ventilation holes (101) are located on the sound-absorbing cotton (320) along the thickness direction of the bottom shell (100).

5. The noise reduction structure of claim 1, wherein, ​ ​ 6. The noise reduction structure of claim 1, wherein, ​ 7. The noise reduction structure of claim 1, wherein, The noise reduction structure further comprises a support (310) arranged in the first air duct portion (211), and the sound-absorbing cotton (320) is clamped between the support (310) and the back plate (200).

8. The noise reduction structure of claim 7, wherein, The support (310) is provided with a limiting portion (311) on one side facing the bottom shell (100), and the limiting portion (311) abuts against the bottom shell (100).

9. The noise reduction structure of claim 8, wherein, The support (310) comprises a rectangular frame (312) provided with a plurality of vertical strip plates (313) and a plurality of horizontal strip plates (314) staggered in horizontal and vertical directions, a plurality of noise reduction holes (315) are formed between the rectangular frame (312), the vertical strip plates (313) and the horizontal strip plates (314), and the limiting portion (311) is arranged on the vertical strip plate (313), and the limiting portion (311) of one of every two adjacent vertical strip plates (313) is arranged in a staggered manner with the limiting portion (311) on the other vertical strip plate (313) along the length direction of the horizontal strip plate (314).

10. The noise reduction structure of claim 7, wherein, The outer edge of the support (310) is provided with a surrounding edge (317), and the sound-absorbing cotton (320) is arranged in the surrounding edge (317).

11. The noise reduction structure according to any one of claims 1-10, wherein, The size of the sound-absorbing cotton (320) along the length direction of the bottom shell (100) is 1 / 3-1 / 2 of the size of the air inlet channel (210) along the length direction of the bottom shell (100).

12. A gas water heater, characterized by, The noise reduction structure comprises the sound-absorbing cotton (320) and the support (310) arranged in the first air duct portion (211). The noise reduction structure comprises the sound-absorbing cotton (320) and the support (210) arranged in the first air duct portion (211).

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