Noise reduction assembly and gas water heating equipment

Abstract

The utility model relates to the technical field of hot water supply equipment, and discloses a noise reduction assembly and gas water heating equipment. The noise reduction assembly comprises a sound absorption part and a back shell, and the back shell is provided with a mounting groove and an outer air inlet structure; the sound absorption part is arranged in the mounting groove, an air inlet space is reserved between the sound absorption part and the opening of the back shell, and the outer air inlet structure is communicated with the air inlet space; the sound absorption piece comprises sound absorption cotton and a porous sound absorption plate which are arranged side by side in the length direction of the back shell, and the porous sound absorption plate is close to the outer air inlet structure relative to the sound absorption cotton. The sound-absorbing cotton and the porous sound-absorbing plate are attached to the bottom face of the mounting groove, noise diffracted by an air inlet of the gas water heating equipment can be well absorbed, meanwhile, the sound-absorbing cotton and the porous sound-absorbing plate are different in absorbing capacity for noise of different frequencies, the sound-absorbing cotton and the porous sound-absorbing plate are used in cooperation to improve the overall sound-absorbing effect of the sound-absorbing piece, and the sound-absorbing effect of the sound-absorbing piece is improved. And noise leakage is effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hot water supply equipment, in particular to a noise reduction component and a gas hot water equipment. Background Art

[0002] A gas hot water equipment is a device that uses gas as an energy source to heat water. Gas hot water equipment is widely used in the fields of home, commerce and industry for hot water supply. Common types of gas hot water equipment include gas water heaters, gas wall-mounted boilers, etc.

[0003] In the prior art, as Figure 1 and Figure 2 shown, the gas hot water equipment 4' is usually installed on the wall 1'. When the gas hot water equipment 4' is in use, a part of the noise inside the gas hot water equipment 4' will be transmitted through the shell of the gas hot water equipment 4', and another part will diffract out through the air inlet and the air inlet channel of the gas hot water equipment 4' in sequence. The noise diffracted out of the air inlet channel will be reflected by the wall 1'. The transmitted sound on the front side, the reflected sound after passing through the wall 1' on the back side, and the diffracted sound directly leaking from the air inlet are superimposed, resulting in a relatively large noise on the periphery of the gas hot water equipment 4'. Summary of the Utility Model

[0004] The first technical problem solved by the utility model is to provide a noise reduction component, which effectively solves the problem of excessive noise of the existing gas hot water equipment. By installing the noise reduction component on the gas hot water equipment, the noise generated during the operation of the gas hot water equipment can be significantly reduced, and the comfort of users can be improved.

[0005] The second technical problem solved by the utility model is to provide a gas hot water equipment, which effectively solves the problem of excessive noise of the existing gas hot water equipment, can significantly reduce the noise generated during the operation of the gas hot water equipment, and improve the comfort of users.

[0006] The above first technical problem is solved by the following technical solutions:

[0007] A noise reduction component for a gas hot water equipment, comprising:

[0008] A sound-absorbing member and a back shell. The back shell has an installation groove and an external air inlet structure. The sound-absorbing member is arranged in the installation groove. There is an air inlet space between the sound-absorbing member and the opening of the back shell. The external air inlet structure is communicated with the air inlet space. The sound-absorbing member includes a sound-absorbing cotton and a porous sound-absorbing board arranged side by side along the length direction of the back shell. The porous sound-absorbing board is closer to the external air inlet structure than the sound-absorbing cotton.

[0009] Compared with the background art, the noise reduction component of the present utility model has the following beneficial effects: Taking a gas water heating device as an example, when using this noise reduction component, the back shell is covered on the air inlet on the back of the gas water heating device, forming an enclosure for the noise leaking from the air inlet. In addition, there is an air inlet space between the sound absorbing member and the opening of the back shell. In this way, the sound absorbing member is installed on the back of the gas water heating device through the back shell, and the air inlet space leaves a gap between the sound absorbing cotton and the porous sound absorption board and the back of the gas water heating device. This gap forms an air inlet channel. Since the air inlet channel is communicated with the air inlet of the gas water heating device, when the gas water heating device is operating, the outside air enters the air inlet channel from the external air inlet structure and enters the air inlet of the gas water heating device along the air inlet channel. It can not only take away part of the heat on the back of the gas water heating device to moderately cool down, but also because the sound absorbing cotton and the porous sound absorption board are arranged in the air inlet channel, the noise generated when the outside air circulates in the air inlet channel can be absorbed by the sound absorbing cotton and the porous sound absorption board, thereby reducing the noise caused by the outside air entering the air inlet channel. In addition, part of the noise generated by the fan and the water pump in the gas water heating device diffracts out through the air inlet of the gas water heating device. Since the air inlet is communicated with the air inlet channel, and the sound absorbing cotton and the porous sound absorption board are arranged in the air inlet channel, the diffracted noise directly enters the sound absorbing cotton and the porous sound absorption board and is absorbed by the sound absorbing cotton and the porous sound absorption board after multiple refractions, thereby reducing the noise leaking from the air inlet.

[0010] At the same time, the sound absorption capabilities of the sound absorbing cotton and the porous sound absorption board for noises of different frequencies are different. The sound absorbing cotton has a good effect on eliminating high-frequency peak noises, such as intake whistling sounds, while the porous sound absorption board has a good effect on eliminating low-frequency peak noises, such as the fundamental frequency and its harmonics generated by the water pump in the gas water heating device. The two are used in combination to improve the overall sound absorption effect of the sound absorbing member and more effectively reduce noise leakage.

[0011] In summary, setting this noise reduction component on the back of the gas water heating device can significantly reduce multiple noises generated during the operation of the gas water heating device and improve the user's comfort level.

[0012] In one embodiment, the above noise reduction component further includes a net plate, the net plate is detachably connected to the back shell and clamps the sound absorbing cotton and the porous sound absorption board between the net plate and the back shell; and / or, the sound absorbing cotton is adhesively fixed to the bottom surface of the installation groove, and the porous sound absorption board is screwed and fixed to the bottom surface of the installation groove.

[0013] In one embodiment, the porous sound absorption board is butted against the sound absorbing cotton and covers and adheres to the bottom surface of the installation groove.

[0014] In one embodiment, the sound absorbing cotton is at least one of polyester fiber cotton, bicomponent cotton or melamine cotton.

[0015] In one embodiment, the thickness of the porous sound-absorbing panel is adapted to the thickness of the sound-absorbing cotton.

[0016] In one embodiment, a plurality of bayonets are provided on the circumferential side of the side wall of the back shell, a plurality of corresponding clamping parts are provided on the circumferential side of the net plate, and the net plate and the back shell are detachably connected by clamping the clamping parts in the bayonets.

[0017] In one embodiment, the net plate has a plurality of strip-shaped holes, and the length direction of the strip-shaped holes is consistent with the length direction of the net plate.

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

[0019] A gas water heating device includes: a housing and a noise reduction assembly, the housing has an air inlet, and the back shell is installed and fixed on the back surface of the housing;

[0020] An air inlet channel is left between the sound-absorbing member and the back surface of the housing, and the air inlet is communicated with the external air inlet structure through the air inlet channel.

[0021] Compared with the background technology, the gas water heating device of the present utility model has the beneficial effects that: the back shell is directly fixed on the back surface of the housing, and a gap is left between the sound-absorbing member and the back surface of the housing, and this gap forms an air inlet channel, and the air inlet channel is respectively communicated with the external air inlet structure and the air inlet, so that the entire noise reduction assembly is installed. The clamping structure formed by the net plate and the back shell can apply a certain pressure to both sides of the sound-absorbing member to ensure that the sound-absorbing member is not easily deformed, and ensure the air intake effect and noise reduction effect of the air inlet channel.

[0022] In one embodiment, the covering area of the back shell is adapted to the area of the back surface of the housing.

[0023] In one embodiment, the air inlet is located on the upper side of the back surface of the housing, and the external air inlet structure is located on the lower side of the back shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the specific embodiments of the present utility model or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0025] Figure 1 FIG. is a schematic structural diagram and a noise distribution diagram of a gas water heating device installed on a wall in the prior art;

[0026] Figure 2 Cross-sectional view and noise distribution diagram of a gas water heating device installed on a wall in the prior art;

[0027] Figure 3 Schematic structural diagram of a noise reduction component of an embodiment of the present utility model installed on a gas water heating device;

[0028] Figure 4 Explosion schematic diagram of a noise reduction component of an embodiment of the present utility model installed on a gas water heating device;

[0029] Figure 5 For Figure 3 Cross-sectional view of the noise reduction component shown installed on a gas water heating device;

[0030] Figure 6 For Figure 5 Partial enlarged view of part A in;

[0031] Figure 7 For Figure 3 Cross-sectional view of the noise reduction component shown installed on a gas water heating device from another perspective;

[0032] Figure 8 Schematic structural diagram of a noise reduction component of an embodiment of the present utility model;

[0033] Figure 9 Schematic structural diagram of a mesh plate of a noise reduction component of an embodiment of the present utility model;

[0034] Figure 10 Schematic structural diagram of a back shell of a noise reduction component of an embodiment of the present utility model;

[0035] Figure 11 Schematic cooperation structure diagram of a back shell and a sound absorbing member of a noise reduction component of an embodiment of the present utility model;

[0036] Figure 12 Schematic test diagram of a gas water heating device of an embodiment of the present utility model in a semi-anechoic chamber.

[0037] Explanation of reference numerals:

[0038] Reference numerals in the prior art:

[0039] 1', wall; 4', gas water heating device.

[0040] Reference numerals of the present utility model:

[0041] 1. Screen panel; 101. Clamping part; 102. Strip-shaped hole; 2. Sound-absorbing member; 201. Sound-absorbing cotton; 202. Perforated sound-absorbing panel; 3. Rear shell; 301. Installation groove; 302. Side wall; 303. Bayonet; 304. Flange; 305. Installation hole; 306. Assembly hole; 307. Opening; 4. Gas water heater; 401. Air inlet; 402. Housing; 5. Air inlet passage; 7. External air inlet structure; 8. Semi-anechoic chamber; 9. Measuring point; 10. Air inlet space. Detailed implementation manners

[0042] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.

[0043] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present application.

[0044] The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, unless otherwise stated, the meaning of "a plurality" is two or more.

[0045] In the description of the present application, it should be noted that, unless otherwise clearly defined and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific situations.

[0046] In related technologies, such as Figure 1 and Figure 2As shown, the gas water heating device 4' is usually installed on the wall 1'. When the gas water heating device 4' is in use, a part of the noise inside the gas water heating device 4' is transmitted through the housing of the gas water heating device 4', and another part diffracts out through the air inlet and the air inlet passage of the gas water heating device 4' in sequence. The noise diffracted out through the air inlet passage will be reflected by the wall 1'. The transmitted sound on the front side, the reflected sound after passing through the wall 1' on the back side, and the diffracted sound directly leaking from the air inlet are superimposed, resulting in a relatively large noise on the periphery of the gas water heating device 4'.

[0047] It should be noted that the main noise sources of the gas water heating device 4' are the combustion system and the fan system noise. The noise frequency is concentrated in the medium and low frequencies of 300 - 1000 Hz. The noise sound waves are relatively long and have strong diffraction ability. There is also high-frequency noise above 1000 Hz.

[0048] Among them, the inside of the housing of the gas water heating device 4' is a reverberant sound field, and the sound energy density at each position is approximately equal. The 6 walls of the housing of the gas water heating device 4' all radiate noise outward. Setting a cover plate on the back of the gas water heating device 4' can change the direction of noise propagation to a certain extent, but cannot effectively attenuate the noise energy. Because the noise diffracted out from the air inlet inside the gas water heating device 4' is transmitted in the form of a plane wave in the back cover plate (the cross-section is a rectangular channel), and the amplitude of the plane wave will not attenuate with the extension of the rectangular channel. Therefore, no matter how long the length of the conventional sound channel is, the sound wave diffracted out from the air inlet can diffract out from the external air inlet structure without attenuation. The reason why the conventional sound channel bottom shell has a "noise reduction effect" is that it changes the diffraction direction of the noise. Even if the amount of noise reflected forward through the wall is reduced, there is still a large reflection effect on the leakage noise at the external air inlet structure of the wall.

[0049] To solve the above technical problems, the embodiments of the present invention will be described below in conjunction with Figures 3 to 11 , describing the embodiments of the present invention.

[0050] According to the embodiments of the present invention, on the one hand, as Figures 3 to 10 shown, a noise reduction component is provided for the gas water heating device 4 to reduce the noise of the gas water heating device 4.

[0051] Among them, the noise reduction component mainly includes a sound absorption member 2 and a back shell 3. The back shell 3 has an installation groove 301 and an external air inlet structure 7. The sound absorption member 2 is arranged in the installation groove 301. There is an air inlet space 10 between the sound absorption member 2 and the opening 307 of the back shell 3. The external air inlet structure 7 is communicated with the air inlet space 10. The sound absorption member 2 includes a sound absorption cotton 201 and a porous sound absorption plate 202 arranged side by side along the length direction of the back shell 3. The porous sound absorption plate 202 is relatively closer to the external air inlet structure 7 than the sound absorption cotton 201. Both the sound absorption cotton 201 and the porous sound absorption plate 202 are located in the installation groove 301 and cover and adhere to the bottom surface of the installation groove 301.

[0052] Taking the gas water heating device 4 as an example for this noise reduction component, when using this noise reduction component, the back shell 3 covers the air inlet 401 on the back of the gas water heating device, forming an enclosure for the noise leaking from the air inlet 401. In addition, there is an air inlet space 10 between the sound absorption member 2 and the opening 307 of the back shell 3. The sound absorption member 2 is installed on the back of the gas water heating device 4 through the back shell 3, and the sound absorption cotton 201 and the porous sound absorption plate 202 are arranged at intervals with the back of the gas water heating device 4. This interval forms an air inlet channel 5. Since the air inlet channel 5 is communicated with the air inlet 401 of the gas water heating device 4, when the gas water heating device 4 is operating, the outside air enters the air inlet channel 5 from the external air inlet structure 7 and enters the air inlet 401 of the gas water heating device 4 along the air inlet channel 5. It can not only take away part of the heat on the back of the gas water heating device 4 to moderately cool down, but also because the sound absorption cotton 201 and the porous sound absorption plate 202 are arranged in the air inlet channel 5, the noise generated when the outside air circulates in the air inlet channel 5 can be absorbed by the sound absorption member 2, thereby reducing the noise caused by the outside air entering the air inlet channel 5.

[0053] In addition, part of the noise generated by the fan and water pump in the gas water heating device 4 diffracts out through the air inlet 401 of the gas water heating device 4. Since the air inlet 401 is communicated with the air inlet channel 5 and the sound absorption member 2 is arranged in the air inlet channel 5, the diffracted noise directly enters the sound absorption cotton 201 and the porous sound absorption plate 202 and is absorbed by the sound absorption cotton 201 and the porous sound absorption plate 202 after multiple refractions, thereby reducing the noise leaking from the air inlet 401. Further, both the sound absorption cotton 201 and the porous sound absorption plate 202 are located in the installation groove 301 and cover and adhere to the bottom surface of the installation groove 301, absorbing the noise transmitted from the back of the gas water heating device 4 in a larger range.

[0054] Meanwhile, the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 have different absorption capabilities for noises of different frequencies. The sound-absorbing cotton 201 has a good effect on eliminating high-frequency peak noises, such as intake whistling noises, while the porous sound-absorbing plate 202 has a good effect on eliminating low-frequency peak noises, such as the fundamental frequency and its harmonics generated by the water pump in the gas water heater. The two are used in combination to improve the overall sound absorption effect of the sound-absorbing component and more effectively reduce noise leakage.

[0055] In summary, by arranging the noise reduction component on the back of the gas water heater 4, the multiple noises generated during the operation of the gas water heater 4 can be significantly reduced, improving the user's comfort level.

[0056] It should be noted that the external air inlet structure 7 can be independently arranged on the back shell 3 to form an external air inlet, or the external air inlet structure 7 and the back of the gas water heater enclose to form an external air inlet.

[0057] In this embodiment, as Figure 8 shown, the above-mentioned noise reduction component further includes a net plate 1, and the net plate 1 is detachably connected to the back shell 3 and clamps the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 between the net plate 1 and the back shell 3; in this way, through the cooperation of the net plate 1 and the back shell 3, the clamping of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 is realized, and the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 are fixed between the net plate 1 and the back shell 3 to ensure that the distance from the side of the sound-absorbing cotton 201 to the back of the gas water heater 4 is constant, avoiding the sound-absorbing cotton 201 from being compressed or blocking the air inlet channel 5 due to expansion, and ensuring the air intake effect and noise reduction effect of the air inlet channel 5.

[0058] Furthermore, in order to better fix the sound-absorbing cotton 201 and the porous sound-absorbing plate 202, the sound-absorbing cotton 201 is adhesively fixed to the bottom surface of the installation groove 301, and the porous sound-absorbing plate 202 is screwed to the bottom surface of the installation groove 301; the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 are located in the installation groove 301 and are clamped by the net plate 1 and tightly attached to the bottom surface of the installation groove 301.

[0059] Specifically, the net plate 1 can be detachably arranged on the back shell 3 by means of fastener connection, and can also be detachably arranged on the back shell 3 by means of snap connection. In the embodiment of the present application, the specific detachable connection method between the net plate 1 and the back shell 3 is not specifically limited.

[0060] It should be noted that the distance from the net plate 1 to the back shell 3 can be designed to be less than the thickness of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 to ensure that the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 are clamped and fixed between the net plate 1 and the back shell 3.

[0061] Specifically, the net plate 1 and the back shell 3 can be arranged in parallel or obliquely. In the embodiments of the present application, the positional relationship between the net plate 1 and the back shell 3 is not specifically limited.

[0062] Specifically, the net plate 1 has a plurality of through holes, so that the noise sound waves in the air inlet channel 5 can directly pass through the through holes of the net plate 1 and enter the sound-absorbing cotton 201 and the porous sound-absorbing plate 202, and then be absorbed by the sound-absorbing cotton 201 and the porous sound-absorbing plate 202. The through holes on the net plate 1 can be set to through holes of any existing shapes such as circular, square, rectangular, etc. In the embodiments of the present application, the shapes and arrangements of the through holes on the net plate 1 are not specifically limited.

[0063] Specifically, the shape of the back shell 3 can be set to be adapted to the shape of the back of the gas water heater 4. The back shell 3 can be made of a metal material or a plastic material. In the embodiments of the present application, the structure and material of the back shell 3 are not specifically limited.

[0064] Specifically, the back shell 3 can be installed on the back of the gas water heater 4 by a detachable installation method, for example, the back shell 3 is installed on the back of the gas water heater 4 by means of fastener connection or snap connection. The back shell 3 can also be installed on the back of the gas water heater 4 by a fixed installation method, for example, the back shell 3 is fixed on the back of the gas water heater 4 by welding. In the embodiments of the present application, the installation method of the back shell 3 and the gas water heater 4 is not specifically limited.

[0065] Specifically, the thickness of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 can be adjusted according to the required sound-absorbing effect. Similarly, the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 can be designed into a flat shape, a wavy shape or other specific shapes, as long as there is an air inlet channel 5 left between the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 and the back of the gas water heater 4. The sizes of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 can be adapted to the area size of the back of the gas water heater 4 to ensure the sound-absorbing and noise-reducing effects of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202. In the embodiments of the present application, the thickness and shape of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 are not specifically limited.

[0066] In one embodiment, as shown in combination with Figure 8 and Figures 10 - 11 , the sound-absorbing cotton 201 can be fixedly bonded to the bottom surface of the installation groove 301.

[0067] The sound-absorbing cotton 201 is fixedly bonded to the bottom surface of the installation groove 301 and the sound-absorbing cotton 201 is installed in the installation groove 301 of the back shell 3, so as to facilitate the firm installation of the sound-absorbing cotton 201 between the back shell 3 and the net plate 1 and improve the noise reduction stability of the noise reduction component.

[0068] Specifically, the sound-absorbing cotton 201 can be adhered to the bottom surface of the installation groove 301 through an adhesive. For example, the adhesive can be selected from double-sided tape, heat-resistant or waterproof water-based adhesives, etc. The sound-absorbing cotton 201 can also be adhered to the mesh plate 1 by hot melt adhesive or magic tape, etc. Similarly, the sound-absorbing cotton 201 can also be adhesively fixed to the back shell 3, which can also improve the overall stability of the noise reduction component. In the embodiments of the present application, the adhesion method of the sound-absorbing cotton 201 is not specifically limited.

[0069] In one embodiment, as Figure 4 、 Figure 5 and Figure 8 shown, one end of the porous sound-absorbing plate 202 abuts against one end of the sound-absorbing cotton 201, and both the porous sound-absorbing plate 202 and the sound-absorbing cotton 201 are clamped between the mesh plate 1 and the bottom surface of the installation groove 301.

[0070] By combining and arranging the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 between the mesh plate 1 and the back shell 3, effective absorption of noises of different frequencies can be achieved. The sound-absorbing capabilities of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 for noises of different frequencies are different. The two used in combination can improve the overall sound absorption effect and more effectively reduce noises. Clamping the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 between the mesh plate 1 and the back shell 3 can improve the stability of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 in the installation groove 301, which helps to maintain the shape and performance of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 during long-term use.

[0071] It should be noted that the porous sound-absorbing plate 202 is mainly used to eliminate low-frequency peak noises, such as the fundamental frequency and its harmonics generated by the water pump in the gas water heating device 4. When selecting the porous sound-absorbing plate 202, the aperture, porosity and the size of the sound cavity space behind the plate of the porous sound-absorbing plate 202 can be adjusted according to the frequency of the gas water heating device 4 to achieve the purpose of eliminating specific frequencies. In the embodiments of the present application, the parameters such as the aperture of the porous sound-absorbing plate 202 are not specifically limited.

[0072] Specifically, the sound-absorbing holes of the porous sound-absorbing plate 202 can be set in any existing shapes such as circular holes, square holes or honeycomb holes, etc. In the embodiments of the present application, the shape of the sound-absorbing holes of the porous sound-absorbing plate 202 is not specifically limited.

[0073] Specifically, the porous sound-absorbing plate 202 can be arranged in the lower area of the sound-absorbing cotton 201, or in the upper area of the sound-absorbing cotton 201, or in the middle area of the sound-absorbing cotton 201. In the embodiments of the present application, the position of the porous sound-absorbing plate 202 is not specifically limited.

[0074] In one embodiment, the sound-absorbing cotton 201 is made of at least one high-efficiency sound-absorbing material, including at least one of polyester fiber cotton, bicomponent cotton or melamine cotton.

[0075] The sound-absorbing cotton 201 is made of polyester fiber cotton, which has good sound-absorbing effect and can effectively absorb medium and high frequency sounds.

[0076] The sound-absorbing cotton 201 is made of bicomponent cotton, which can provide better structural stability. The combination of different densities helps to absorb sounds in a wider frequency range and usually has good resistance to compression deformation, maintaining long-term sound-absorbing performance.

[0077] The sound-absorbing cotton 201 is made of melamine cotton, which is suitable for use in high-temperature environments and can provide good sound-absorbing effect, especially in the absorption of high-frequency noise.

[0078] Specifically, the material of the sound-absorbing cotton 201 can be customized according to the specific application environment and noise reduction requirements of the gas water heater 4 to achieve the best sound-absorbing effect and durability. In the embodiments of the present application, the material of the sound-absorbing cotton 201 is not specifically limited.

[0079] Specifically, the bicomponent cotton can be polypropylene (PP) and polyethylene terephthalate (PET) bicomponent cotton.

[0080] In one embodiment, as shown in Figure 4 and Figure 5 the thickness of the porous sound-absorbing panel 202 is adapted to the thickness of the sound-absorbing cotton 201, and the porous sound-absorbing panel 202 is arranged below the sound-absorbing cotton 201.

[0081] The thickness of the porous sound-absorbing panel 202 is set to be adapted to the thickness of the sound-absorbing cotton 201, so as to facilitate the simultaneous installation of the porous sound-absorbing panel 202 and the sound-absorbing cotton 201 between the mesh panel 1 and the back shell 3, simplify the installation, ensure that no adjustment is required during installation, and it can be directly placed, reducing the assembly time and complexity. The porous sound-absorbing panel 202 is arranged below the sound-absorbing cotton 201. The porous sound-absorbing panel 202 can provide a certain supporting force for the sound-absorbing cotton 201, and usually the porous sound-absorbing panel 202 has a certain weight. Arranging it below the sound-absorbing cotton 201 can avoid pressing on the sound-absorbing cotton 201, maintaining the structural stability and extending the service life.

[0082] Specifically, the thickness of the sound-absorbing cotton 201 can be slightly larger than the thickness of the porous sound-absorbing panel 202. After the sound-absorbing cotton 201 is installed in the installation groove 301, due to the certain pressure exerted on the sound-absorbing cotton 201 by the back shell 3 and the mesh panel 1, the sound-absorbing cotton 201 is compressed, resulting in its own thickness being reduced to be equal to the thickness of the porous sound-absorbing panel 202.

[0083] Specifically, as shown in Figure 8 and Figure 10As shown, a plurality of assembly holes 306 can be provided at the position of the back shell 3 corresponding to the porous sound-absorbing panel 202. When installing the porous sound-absorbing panel 202, the porous sound-absorbing panel 202 can be fixed to the back shell 3 by a fastener passing through the assembly holes 306. In the embodiment of the present application, the installation method of the porous sound-absorbing panel 202 and the back shell 3 is not specifically limited.

[0084] In one embodiment, in combination with Figure 9 and Figure 10 As shown, a plurality of bayonet joints 303 are provided on the side wall 302 of the back shell 3, and the peripheral edge of the net plate 1 is provided with clamping portions 101 corresponding to the bayonet joints 303 one by one. By inserting the clamping portions 101 into the bayonet joints 303, the detachable connection between the net plate 1 and the back shell 3 can be realized.

[0085] By providing the bayonet joints 303 on the side wall 302 of the back shell 3 and correspondingly providing the clamping portions 101 on the periphery of the net plate 1, the installation of the net plate 1 becomes simple and fast, without the need for additional tools or complex steps. When it is necessary to maintain or replace the sound-absorbing member 2 and the porous sound-absorbing panel 202, the net plate 1 can be quickly disassembled, improving the maintenance efficiency. The clamping design can prevent the loosening of components caused by vibration or impact, improving the use safety.

[0086] It should be noted that the bayonet joints 303 and the clamping portions 101 can also be interchangeably arranged, that is, the bayonet joints 303 can also be provided on the net plate 1, and the clamping portions 101 are correspondingly provided on the back shell 3 corresponding to the bayonet joints 303, or both bayonet joints 303 and clamping portions 101 are provided on the periphery of the net plate 1.

[0087] Specifically, the bayonet joints 303 are provided in the middle area of the peripheral side of the side wall 302 of the back shell 3. The position of the bayonet joints 303 is also the installation position of the net plate 1, and the distance formed between the net plate 1 and the back of the gas water heater 4 is the air inlet channel 5.

[0088] Specifically, as Figure 10 As shown, a flanging 304 is provided around the peripheral side of the side wall 302 of the back shell 3, and a plurality of mounting holes 305 are provided on the flanging 304. The mounting holes 305 on the flanging 304 cooperate with fasteners to stably assemble the back shell 3 on the back of the gas water heater 4, so as to facilitate the installation of the back shell 3 on the gas water heater 4.

[0089] In one embodiment, as Figure 9 As shown, the net plate 1 has a plurality of strip-shaped holes 102, and the length direction of the strip-shaped holes 102 is arranged parallel to the length direction of the net plate 1.

[0090] A plurality of strip-shaped holes 102 are provided on the mesh plate 1. Since the length direction of the strip-shaped holes 102 is parallel to the length direction of the mesh plate 1, the probability of contact between the noise sound waves in the air inlet passage and the mesh plate 1 is reduced, and the probability of contact between the noise sound waves in the air inlet passage and the sound-absorbing member 2 is increased, thereby improving the sound-absorbing effect and more effectively absorbing and reducing noise. At the same time, the strip-shaped holes 102 provide additional rigidity to the mesh plate 1, enhance the stability of the overall structure, and reduce vibration and distortion.

[0091] Specifically, the strip-shaped holes 102 can be set in a rectangular shape, an elliptical shape, etc. In the embodiments of the present application, the shape of the strip-shaped holes 102 is not specifically limited.

[0092] Exemplarily, as Figure 8 shown, the strip-shaped holes 102 are set in a rectangular shape, and a plurality of strip-shaped holes 102 can be arranged in parallel.

[0093] Specifically, the strip-shaped holes 102 corresponding to the position of the air inlet 401 on the mesh plate 1 can be set denser than the strip-shaped holes 102 in other areas, so that the strip-shaped holes 102 in the area of the air inlet 401 can better press the sound-absorbing cotton 201, and prevent the sound-absorbing cotton 201 at the inlet and outlet from passing through the strip-shaped holes 102 to compress or block the air inlet passage 5, ensuring that the gas water heater 4 can obtain sufficient air supply.

[0094] Specifically, the porous sound-absorbing plate 202 can be selected from foam materials, plastic materials, etc. In the embodiments of the present application, the material of the porous sound-absorbing plate 202 is not specifically limited.

[0095] According to an embodiment of the present invention, on the other hand, in combination with Figure 3 and Figure 4 shown, a gas water heater is also provided, including a housing 402 and a noise reduction assembly.

[0096] Specifically, as Figure 4 shown, the housing 402 has an air inlet 401, and the back shell 3 of the noise reduction assembly is installed on the back of the housing 402.

[0097] Specifically, in combination with Figure 4 and Figure 5 shown, there is an air inlet passage 5 left between the sound-absorbing member 2 and the back of the housing 402, and the air inlet 401 is communicated with the external air inlet structure 7 through the air inlet passage 5.

[0098] It should be noted that the back of the housing 402 refers to the side of the gas water heater 4 that contacts the wall. When installing the gas water heater 4, the back is usually facing the wall, and the front is facing the user.

[0099] This gas water heating device, the gas water heating device 4 provided with this noise reduction component, has a significantly better noise reduction effect compared to the existing gas water heating device 4. The back shell 3 is directly fixed to the back of the housing 402, and a gap is left between the net plate 1 and the back of the housing 402. This gap forms an air inlet channel 5, and the air inlet channel 5 is respectively communicated with the external air inlet structure 7 and the air inlet 401, so that the entire noise reduction component is installed. The clamping structure formed by the net plate 1 and the back shell 3 can apply a certain pressure to both sides of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 to ensure that the sound-absorbing cotton 201 is not easily deformed and displaced and the porous sound-absorbing plate 202 is not easily displaced, ensuring the air intake effect and noise reduction effect of the air inlet channel 5.

[0100] Specifically, in combination with Figure 4 and Figure 5 shown, the length of the air inlet channel 5 can be similar to the length of the back of the housing 402, the width of the air inlet channel 5 can be similar to the width of the back of the housing 402, and the length and width of the air inlet channel 5 can be adaptively adjusted according to the back size of the housing 402. In the embodiment of the present application, the length and width of the air inlet channel 5 are not specifically limited.

[0101] Specifically, the air inlet channel 5 should ensure that the outside air can smoothly enter the gas water heating device 4. As Figure 7 shown, the cross-section of the air inlet channel 5 in this embodiment is rectangular. Let the perimeter of this rectangle be C and the area be S. While ensuring the smooth air intake of the gas water heating device 4, and when the length L of the rectangle is close to the width of the gas water heating device 4 as a constant value, the ratio of C / S should be as large as possible. When the cross-sectional area S of the air inlet channel 5 is too small, the air intake resistance increases, and the DC fan of the gas water heating device 4 will speed up, resulting in an increase in noise. When the cross-sectional area S of the air inlet channel 5 is too small, the noise coming out of the air inlet channel 5 will increase. Therefore, the ratio of C / S needs to be appropriately adjusted according to the models with different powers of the gas water heating device 4 and its noise characteristics.

[0102] It should be noted that the type of the gas water heating device 4 can be a gas water heater, a gas wall-mounted boiler, etc. In the embodiment of the present application, the type of the gas water heating device 4 is not specifically limited.

[0103] In one embodiment, as Figure 4 shown, the covering area of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 matches the back size of the housing 402.

[0104] The covering areas of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 are set to match the size of the back surface of the housing 402, ensuring that the entire area of the back surface of the housing 402 is covered by the sound-absorbing cotton 201 and the porous sound-absorbing plate 202, so as to more effectively absorb the noise in the air intake channel 5, improve the sound-absorbing efficiency, reduce the noise transmission, and enhance the overall noise reduction effect. At the same time, selecting the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 with adapted sizes makes it easier to install and fix the sound-absorbing cotton 201 and the porous sound-absorbing plate 202, reducing the complexity during the installation process.

[0105] Specifically, as Figure 4 shown, the back surface of the housing 402 is rectangular, and the sound-absorbing member 2 can be set to be rectangular with a size similar to that of the back surface of the housing 402 to ensure the sound-absorbing effect of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202, and at the same time facilitate the installation of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202. Therefore, the overall shape and the covering area size of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 can be adaptively adjusted according to the shape of the back surface of the housing 402. In the embodiments of the present application, no specific restrictions are imposed on the shape and area size of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202.

[0106] In one embodiment, the covering area of the back shell 3 is adapted to the area of the back surface of the housing 402. In this way, the noise transmitted from the back surface of the housing 402 can be absorbed in a larger range.

[0107] In one embodiment, as combined with Figures 4 to 6 shown, the air inlet 401 is usually arranged at the upper position of the back surface of the housing 402, and the external air inlet structure 7 is arranged at the lower side of the back shell 3, so that the distance between the air inlet 401 and the external air inlet structure 7 is long enough to ensure a sufficiently long air intake channel 5.

[0108] The air inlet 401 is arranged near the upper side of the air intake channel 5, while the external air inlet structure 7 is arranged near the lower side of the air intake channel 5, and the distance from the air inlet 401 to the external air inlet structure 7 is as long as possible. After the noise enters the air intake channel 5 from the air inlet 401, it needs to pass through a relatively long path in the air intake channel 5 to reach the external air inlet structure 7. Since the distance of the noise sound wave in the air intake channel 5 from the air inlet 401 to the external air inlet structure 7 is long, the number of reflections of the noise sound wave passing through the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 in the air intake channel 5 can be increased, thereby enhancing the absorption effect of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 on the noise, effectively reducing the noise generated during the operation of the gas water heater 4, and reducing the influence of the noise on the user. In addition, the outside air enters the interior of the gas water heater 4 from the air inlet 401 at the top of the housing 402, and then the air flow flows downward from the top of the gas water heater 4, and the electrical components inside the gas water heater 4 can be effectively cooled during the air flow process.

[0109] Specifically, in this embodiment, the external air inlet structure 7 and the back surface of the housing 402 enclose to form an external air inlet; the external air inlet structure 7 can be set in any existing shape such as rectangular, circular, strip-shaped or grille form, etc. In the embodiments of the present application, the shape of the external air inlet structure 7 is not specifically limited.

[0110] Exemplarily, as shown in Figure 4 , Figure 5 and Figure 10 , the external air inlet structure 7 extends along the width direction of the back shell 3 to both sides of the back shell 3 to ensure that the opening area of the external air inlet structure 7 is large enough to guarantee the air intake of the gas water heater 4.

[0111] The working principle of the gas water heater in this embodiment is described as follows:

[0112] First, bond the sound-absorbing member 2 to the mesh plate 1 or directly place it into the installation groove 301 of the back shell 3. Place the porous sound-absorbing plate 202 below the sound-absorbing cotton 201, and fix the porous sound-absorbing plate 202 on the back plate through the fastener passing through the assembly hole 306. Then insert the clamping part 101 on the periphery of the mesh plate 1 into the bayonet 303, so that the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 are clamped between the mesh plate 1 and the back shell 3. Then, pass the screw through the installation hole 305 of the flanging 304 to firmly assemble the back shell 3 on the back surface of the housing 402 of the gas water heater 4.

[0113] During the operation of the gas water heater 4, the outside air can enter the air inlet passage 5 from the external air inlet structure 7 and enter the air inlet 401 of the gas water heater 4 along the path of the air inlet passage 5, ensuring the air circulation inside the gas water heater 4 and ensuring that the gas water heater 4 can burn sufficiently.

[0114] During the operation of the gas water heater 4, part of the generated noise will diffract out through the air inlet 401 of the gas water heater 4. Since the air inlet 401 of the gas water heater 4 is arranged on the upper side close to the air inlet passage 5, and the external air inlet structure 7 is arranged on the lower side close to the air inlet passage 5, after the noise enters the air inlet passage 5 from the air inlet 401, it needs to pass through a longer path in the air inlet passage 5 to reach the external air inlet structure 7, which can increase the number of reflections of the noise sound wave passing through the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 in the air inlet passage 5, thereby improving the absorption effect of the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 on the noise and reducing the leakage amount of the internal noise of the gas water heater 4 from the external air inlet structure 7.

[0115] To better illustrate the noise reduction effect of the gas water heater 4, take the following experimental test as an example:

[0116] 1. Experimental conditions:

[0117] Taking the gas water heater as an example of the gas water heating equipment 4, the experimental tests are carried out in a semi-anechoic chamber 8 (background noise < 20 dB(A)) that meets the requirements of the national standard GB6932-2015 for gas instantaneous water heaters. The experimental scheme is as follows:

[0118] According to the experimental requirements of the national standard GB6932-2015 for gas instantaneous water heaters, as Figure 12 shown, sound pressure level measurement points 9 are arranged at a distance of 1 m in front of, to the left and to the right of the gas water heater. The gas water heater is adjusted to the rated load condition, and the noise conditions of the gas water heater using different noise reduction schemes are tested, and the sound pressure level (A) is recorded.

[0119] 2. Test scheme:

[0120] Three groups of experiments are tested. The whole machine is suspended on the vertical wall of the experimental table. Experiment 1 is the control group, that is, no noise reduction measures are taken at the rear of the whole water heater. Experiment 2 is to set only a single-layer metal back plate at the rear of the whole machine. Experiment 3 is the structure that adopts the back shell 3, the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 of the present application, and the sound-absorbing cotton 201 and the porous sound-absorbing plate 202 cover the back of the gas water heating equipment shell.

[0121] 3. Experimental results:

[0122]

[0123] It can be seen that compared with the gas water heating equipment without the noise reduction component, the noise of the gas water heating equipment adopting the noise reduction component of the present application has decreased by 7-8 decibels, and the noise reduction effect is remarkable.

[0124] In the specific content of the above specific implementation manner, each technical feature can be combined arbitrarily without contradiction. For the sake of concise description, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features does not exist in contradiction, it should be considered as the scope recorded in this specification.

[0125] The specific content of the above specific implementation manner only expresses several implementation manners of the present invention, and its description is relatively specific and detailed, but it cannot be understood as a limitation to the scope of the patent of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention should be subject to the appended claims.

Claims

1. A noise reduction component for a gas water heating device (4), characterized in that, Comprising: A sound-absorbing member (2) and a back shell (3), the back shell (3) having a mounting groove (301) and an external air inlet structure (7); the sound-absorbing member (2) is disposed in the mounting groove (301), and there is an air inlet space (10) between the sound-absorbing member (2) and the opening (307) of the back shell (3), and the external air inlet structure (7) is communicated with the air inlet space (10); the sound-absorbing member (2) includes a sound-absorbing cotton (201) and a porous sound-absorbing plate (202) arranged side by side along the length direction of the back shell (3), and the porous sound-absorbing plate (202) is closer to the external air inlet structure (7) than the sound-absorbing cotton (201).

2. The noise reduction component according to claim 1, wherein: It further includes a net plate (1), the net plate (1) is detachably connected to the back shell (3) and clamps the sound-absorbing cotton (201) and the porous sound-absorbing plate (202) between the net plate (1) and the back shell (3); and / or, the sound-absorbing cotton (201) is adhesively fixed to the bottom surface of the mounting groove (301), and the porous sound-absorbing plate (202) is screwed and fixed to the bottom surface of the mounting groove (301).

3. The noise reduction component according to claim 2, wherein: The porous sound-absorbing plate (202) is docked with the sound-absorbing cotton (201) and covers and adheres to the bottom surface of the mounting groove (301).

4. The noise reduction component according to claim 3, wherein: The thickness of the porous sound-absorbing plate (202) is adapted to the thickness of the sound-absorbing cotton (201).

5. The noise reduction component according to claim 2, characterized in that: The sound-absorbing cotton (201) is one of polyester fiber cotton, bicomponent cotton or melamine cotton.

6. The noise reduction component according to any one of claims 2 to 5, characterized in that: A plurality of bayonets (303) are provided on the peripheral side of the side wall (302) of the back shell (3), a plurality of corresponding engaging portions (101) are provided on the periphery of the net plate (1), and the net plate (1) and the back shell (3) are detachably connected by engaging the engaging portions (101) in the bayonets (303).

7. The noise reduction component according to any one of claims 2 to 5, characterized in that: The net plate (1) has a plurality of strip-shaped holes (102), and the length direction of the strip-shaped holes (102) is consistent with the length direction of the net plate (1).

8. A gas water heating device, characterized in that, Comprising: A housing (402) The noise reduction assembly according to any one of claims 1 to 7, the housing (402) having an air inlet (401), and the back shell (3) is mounted and fixed on the back surface of the housing (402); There is an air inlet channel (5) between the sound-absorbing member (2) and the back surface of the housing (402), and the air inlet (401) is communicated with the external air inlet structure (7) through the air inlet channel (5).

9. The gas water heating device according to claim 8, wherein: The covering area of the back shell (3) is adapted to the back surface area of the housing (402).

10. The gas water heating device according to claim 8, wherein: The air inlet (401) is located on the upper side of the back surface of the housing (402), and the external air inlet structure (7) is located on the lower side of the back shell (3).

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