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 back shell and a sound absorption part, the back shell is provided with an installation groove and an outer air inlet structure, the sound absorption part is installed in the installation groove, the front face of the sound absorption part is back to the inner bottom face of the installation groove, an air inlet space is reserved between the front face of the sound absorption part and an opening of the back shell, and the outer air inlet structure is communicated with the air inlet space. The sound absorption piece is installed on the back face of the gas water heating device through the back shell, the air inlet channel is formed between the sound absorption piece and the back face of the gas water heating device, noise sound waves can be reflected by the sound absorption piece for multiple times in the air inlet channel, and the noise sound waves can be effectively absorbed in the process that the noise sound waves are reflected by the sound absorption piece for multiple times. The sound absorption part can absorb and dissipate a large amount of noise sound waves, the leakage amount of noise in the gas water heating equipment from the outer air inlet structure is reduced, the noise generated during operation of the gas water heating equipment can be remarkably reduced, and the noise transmitted to the ears of a user is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of hot water supply equipment, and particularly relates 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 3' is usually installed on the wall 1'. When the gas hot water equipment 3' is in use, a part of the noise inside the gas hot water equipment 3' will be transmitted through the shell of the gas hot water equipment 3', and another part will diffract out through the air inlet and the air inlet channel of the gas hot water equipment 3' in sequence. The noise diffracted out from the air inlet channel will be reflected by the wall 1', and the noise diffracted out from the air inlet will be directly transmitted to the user's ear after being reflected by the wall 1', resulting in a relatively large noise on the periphery of the gas hot water equipment 3'. 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 user use 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 user use.

[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 back shell having an installation groove and an external air inlet structure;

[0009] A sound absorption member is arranged in the installation groove. The front surface of the sound absorption member faces away from the inner bottom surface of the installation groove, and there is an air inlet space between the front surface of the sound absorption member and the opening of the back shell. The external air inlet structure is communicated with the air inlet space.

[0010] Compared with the background art, the noise reduction component of the present utility model has the following beneficial effects: The sound-absorbing member is installed and fixed in the installation groove of the back shell, so that the back shell provides support for the sound-absorbing member. Taking a gas water heating device as an example, when using this noise reduction component, the back shell covers the air inlet on the back of the gas water heating device, forming an enclosure for the noise leaking from the air inlet. There is an air inlet space between the front surface of 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 there is a gap between the sound-absorbing member 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 can enter the air inlet channel from the external air inlet structure and enter the air inlet of the gas water heating device along the air inlet channel. Due to the presence of the sound-absorbing member, the noise generated when the outside air flows in the air inlet channel can be absorbed by the sound-absorbing member, thereby reducing the noise caused by the outside air entering the air inlet channel.

[0011] In addition, part of the noise generated by the fan and 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 member is arranged in the air inlet channel, the diffracted noise directly enters the sound-absorbing member and is absorbed by the sound-absorbing member, thereby reducing the noise leaking from the air inlet. To sum up, setting this noise reduction component on the back of the gas water heating device can significantly reduce multiple noises generated when the gas water heating device is operating, reduce the noise transmitted to the user's ears, and improve the user's comfort.

[0012] In one embodiment, the external air inlet structure is arranged on the side wall of the bottom surface periphery of the back shell connecting the installation groove.

[0013] In one embodiment, it further includes a net plate, the net plate is detachably connected to the back shell and clamps the sound-absorbing member between the net plate and the back shell; and / or, the sound-absorbing member is adhesively fixed on the bottom surface of the installation groove.

[0014] In one embodiment, a plurality of bayonets are arranged on the peripheral side of the side wall of the back shell, a plurality of corresponding clamping parts are arranged on the peripheral side of the net plate, and the net plate and the back shell are detachably connected by clamping the clamping parts in the bayonets.

[0015] In one embodiment, the net plate has a plurality of first strip-shaped holes, and the length direction of the first strip-shaped holes is consistent with the length direction of the net plate.

[0016] In one embodiment, the back shell includes a back plate, a side wall arranged around the periphery of the back plate, and a flanging arranged around the side wall. The flanging is provided with installation holes. The installation groove is formed between the back plate and the side wall, and the external air inlet structure is arranged on the side wall.

[0017] In one embodiment, the sound-absorbing member is covered and disposed on the bottom surface of the installation groove.

[0018] In one embodiment, the sound-absorbing member is sound-absorbing cotton, and the sound-absorbing cotton is at least one of polyester fiber cotton, bicomponent cotton or melamine cotton.

[0019] The above second technical problem is solved by the following technical solutions:

[0020] A gas water heating device includes: a housing and a noise reduction component; the housing has an air inlet, and the air inlet is arranged away from the external air inlet structure; the back shell is disposed on the back surface of the housing, the air inlet and the external air inlet structure are arranged vertically, an air inlet passage is left between the sound-absorbing member and the back surface of the housing, and the external air inlet structure is communicated with the air inlet through the air inlet passage.

[0021] Compared with the background art, the gas water heating device of the present utility model has the beneficial effects that: the gas water heating device provided with the noise reduction component has an obvious noise reduction effect compared with the existing gas water heating device. The back shell is directly fixed on the back surface of the housing of the gas water heating device. The air inlet space leaves a gap between the sound-absorbing member and the back surface of the housing, and this gap forms an air inlet passage. The air inlet passage is respectively communicated with the external air inlet structure and the air inlet, so that the whole noise reduction component is installed, and the installation is convenient. The air inlet is arranged away from the external air inlet structure, so that after the noise enters the air inlet passage from the air inlet, it needs to pass through a longer path in the air inlet passage to reach the external air inlet structure, increasing the number of reflections of the noise sound wave passing through the sound-absorbing member in the air inlet passage, thereby enhancing the absorption effect of the sound-absorbing member on the noise, effectively reducing the noise generated when the gas water heating device is running, and improving the user's comfort.

[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. 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 to be used in the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0025] Figure 1Schematic diagram of the structure of a gas water heating device installed on a wall and noise distribution diagram in the prior art;

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

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

[0028] Figure 4 Exploded view of a noise reduction component of an embodiment of the present invention 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 diagram of the structure of a mesh plate of a noise reduction component of an embodiment of the present invention;

[0033] Figure 9 Schematic diagram of the structure of a back shell of a noise reduction component of an embodiment of the present invention;

[0034] Figure 10 Schematic diagram of the mating structure of a back shell and a sound absorbing member of a noise reduction component of an embodiment of the present invention;

[0035] Figure 11 Schematic diagram of the test of a gas water heating device of an embodiment of the present invention in a semi-anechoic chamber.

[0036] Explanation of reference numerals:

[0037] Reference numerals in the prior art:

[0038] 1’, wall; 3’, gas water heating device.

[0039] Reference numerals of the present invention:

[0040] 1. Back shell; 101. Installation groove; 102. Bayonet; 103. Back plate; 104. Side wall; 105. Flange; 1051. Installation hole; 106. Reinforcing rib; 107. Opening; 2. Sound-absorbing member; 3. Gas water heating equipment; 301. Housing; 302. Air inlet; 4. Air inlet channel; 5. External air inlet structure; 6. Mesh plate; 601. Clamping portion; 602. First strip-shaped hole; 603. Second strip-shaped hole; 7. Semi-anechoic chamber; 8. Measuring point; 9. Air inlet space. Detailed implementation manners

[0041] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the protection scope of the present application.

[0042] 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 thus should not be construed as a limitation to the present application.

[0043] The terms "first" and "second" are only used for descriptive purposes, and cannot be construed as indicating or implying relative importance or implicitly indicating the number 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 specified, the meaning of "a plurality" is two or more.

[0044] 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.

[0045] In the related art, such as Figure 1 and Figure 2As shown, the gas water heating device 3' is usually installed on the wall 1'. When the gas water heating device 3' is in use, a part of the noise inside the gas water heating device 3' is transmitted through the housing of the gas water heating device 3', and another part diffracts out through the air inlet and the air inlet passage of the gas water heating device 3' in sequence. The noise diffracted out from the air inlet passage will be reflected by the wall 1', and the noise diffracted out from the air inlet will be directly transmitted to the user's ears after being reflected by the wall 1', resulting in a relatively large noise on the peripheral side of the gas water heating device 3'.

[0046] It should be noted that the main noise sources of the gas water heating device 3' 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.

[0047] Among them, the inside of the housing of the gas water heating device 3' 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 3' all radiate noise outward. Setting a cover plate on the back of the gas water heating device 3' 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 3' 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 does not decay as the rectangular channel extends. 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 outer 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 outer air inlet structure of the wall.

[0048] To solve the above technical problems, the following will be combined with Figures 3 to 9 , to describe the embodiments of the present invention.

[0049] It should be noted that the gas water heating device mentioned in this embodiment includes, but is not limited to, devices such as gas water heaters and wall-mounted boilers that use the mixed combustion of gas and air to provide hot water.

[0050] According to the embodiments of the present invention, on the one hand, as Figures 3 to 9 shown, a noise reduction component is provided for the gas water heating device 3 to reduce the noise of the gas water heating device.

[0051] Among them, the noise reduction component mainly includes a back shell 1 and a sound absorption member 2.

[0052] Specifically, as Figure 3 shown, the back shell 1 is provided with an installation groove 101 (as Figure 9 shown) and an outer air inlet structure 5 (as Figure 5As shown, the external air inlet structure 5 is provided on the side wall of the outer periphery of the bottom surface of the connection and installation groove 101 of the back shell 1.

[0053] Specifically, in combination with Figures 3 to 10 As shown, the sound-absorbing member 2 is installed in the installation groove 101. The front surface of the sound-absorbing member 2 faces away from the inner bottom surface of the installation groove 101. There is an air inlet space 9 between the front surface of the sound-absorbing member 2 and the opening 107 of the back shell 1. The external air inlet structure 5 communicates with the air inlet space 9.

[0054] Specifically, as Figure 5 shown, the external air inlet structure 5 is provided on the peripheral side wall 104 of the back shell 1 (as Figure 9 shown), and it is ensured that the external air inlet structure 5 is far away from the air inlet 302 of the gas water heater 3. Keep a certain distance between the external air inlet structure 5 and the air inlet 302 of the gas water heater 3.

[0055] For this noise reduction component, the sound-absorbing member 2 is installed in the installation groove 101 of the back shell 1, so as to use the back shell 1 to provide support for the sound-absorbing member 2. Taking the gas water heater as an example, when using this noise reduction component, the back shell 1 covers the air inlet 302 on the back of the gas water heater, forming a surrounding of the noise leaking from the air inlet 302. There is an air inlet space 9 between the front surface of the sound-absorbing member 2 and the opening 107 of the back shell 1. The sound-absorbing member 2 is installed on the back of the gas water heater 3 through the back shell 1 and there is a gap between the sound-absorbing member 2 and the back of the gas water heater 3. This gap forms an air inlet channel 4. Since the air inlet channel 4 communicates with the air inlet 302 of the gas water heater 3, when the gas water heater 3 is running, the outside air can enter the air inlet channel 4 from the external air inlet structure 5 and enter the air inlet 302 of the gas water heater 3 along the air inlet channel 4. Due to the presence of the sound-absorbing member 2, the noise generated when the outside air flows in the air inlet channel 4 can be absorbed by the sound-absorbing member 2, thereby reducing the noise caused by the outside air entering the air inlet channel 4.

[0056] In addition, part of the noise generated by the fan and water pump in the gas water heater 3 diffracts out through the air inlet 302 of the gas water heater 3. Since the air inlet 302 communicates with the air inlet channel 4 and the sound-absorbing member 2 is provided in the air inlet channel 4, the diffracted noise directly enters the sound-absorbing member 2 and is absorbed by the sound-absorbing member 2, thereby reducing the noise leaking from the air inlet 302. At the same time, since the external air inlet structure 5 is provided on the side wall of the outer periphery of the bottom surface of the connection and installation groove 101 of the back shell 1, it avoids facing the wall, thereby changing the diffraction direction of the noise, and further reducing the noise reflected by the wall. To sum up, setting this noise reduction component on the back of the gas water heater 3 can significantly reduce multiple noises generated when the gas water heater 3 is running, reduce the noise transmitted to the user's ears, and improve the user's comfort.

[0057] It should be noted that the external air inlet structure 5 can be independently provided on the back shell 1 to form an external air inlet, or the external air inlet structure 5 and the back of the gas water heater device enclose to form an external air inlet.

[0058] Specifically, the shape of the back shell 1 can be set to match the shape of the back of the gas water heater device 3. The back shell 1 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 1 are not specifically limited.

[0059] Specifically, the size of the installation groove 101 should ensure that the sound-absorbing member 2 can be installed, and there is an air inlet channel 4 between the sound-absorbing member 2 and the back of the gas water heater device 3. The specific setting requirements of the installation groove 101 can be set accordingly according to the corresponding gas water heater device 3. In the embodiments of the present application, the size and structure of the installation groove 101 are not specifically limited.

[0060] Specifically, the thickness and density of the sound-absorbing member 2 can be adjusted according to the required sound-absorbing effect. Similarly, the sound-absorbing member 2 can be designed in a flat shape, a wavy shape or other specific shapes, as long as there is an air inlet channel 4 between the sound-absorbing member 2 and the back of the gas water heater device 3. The size of the sound-absorbing member 2 can be adapted to the area of the back of the gas water heater device 3 to ensure the sound-absorbing and noise-reducing effect of the sound-absorbing member 2. In the embodiments of the present application, the thickness and shape of the sound-absorbing member 2 are not specifically limited.

[0061] Exemplarily, the installation groove 101 can be set in a cuboid shape, and the sound-absorbing member 2 is set in a flat shape and installed in the installation groove 101.

[0062] Specifically, the external air inlet structure 5 can be independently provided on the back shell 1 to form an external air inlet, or the external air inlet structure 5 and the back of the gas water heater device enclose to form an external air inlet; the external air inlet structure 5 can be provided on the bottom wall of the side wall 104 of the outer periphery of the bottom surface of the installation groove 101 connected to the back shell 1, or can be provided in the area near the bottom of the side wall 104 of the outer periphery of the bottom surface of the installation groove 101 connected to the back shell 1. The position of the external air inlet structure 5 can be adaptively set according to the use scenario. In the embodiments of the present application, the specific position of the external air inlet structure 5 is not limited. It should be noted that the orientation of the external air inlet structure 5 should avoid the direction opposite to the wall.

[0063] Specifically, the external air inlet structure 5 can be set in any existing shape such as a rectangle, a circle or a grille form, etc. In the embodiments of the present application, the shape of the external air inlet structure 5 is not specifically limited.

[0064] In one embodiment, the sound-absorbing member 2 is covered and attached to the bottom surface of the installation groove 101. Specifically, the sound-absorbing member 2 is fixed to the bottom surface of the installation groove 101 by an adhesive method.

[0065] The sound-absorbing member 2 is closely attached to the inner bottom surface of the installation groove 101 by bonding, so that the sound-absorbing member 2 is firmly installed in the installation groove 101, improving the stability of the noise reduction assembly. Since the thickness of the sound-absorbing member 2 is less than the thickness of the installation groove 101, an air inlet space 9 is left between the front surface of the sound-absorbing member 2 and the opening 107 of the back shell 1. The air inlet space 9 provides sufficient space for the air inlet passage 4, contributing to maintaining the air circulation inside the gas water heater 3 and ensuring the combustion efficiency. At the same time, a good sound-absorbing effect can be achieved within a limited space without occupying too much internal space.

[0066] Specifically, the sound-absorbing member 2 can be bonded to the inner bottom surface of the installation groove 101 by an adhesive. For example, the adhesive can be selected from double-sided tape, high-temperature resistant or waterproof water-based adhesive, etc. The sound-absorbing member 2 can also be bonded to the inner wall of the installation groove 101 by hot melt adhesive or magic tape, etc. In the embodiments of the present application, the bonding method of the sound-absorbing member 2 is not specifically limited.

[0067] In one embodiment, as Figures 4 to 8 shown, it further includes a mesh plate 6. The mesh plate 6 is detachably arranged on the back shell 1. Through the cooperation of the mesh plate 6 and the back shell 1, the sound-absorbing member 2 is clamped, and the sound-absorbing member 2 is fixed between the mesh plate 6 and the back shell 1.

[0068] Specifically, the distance from the mesh plate 6 to the back shell 1 is less than the thickness of the sound-absorbing member 2, so that the sound-absorbing member 2 is clamped and fixed between the mesh plate 6 and the back shell 1. By detachably arranging the mesh plate 6 on the back shell 1, it is convenient to install the sound-absorbing member 2 and the mesh plate 6 on the back shell 1. At the same time, the clamping structure formed by the mesh plate 6 and the back shell 1 can apply a certain pressure on both sides of the sound-absorbing member 2 to ensure that the distance from the side surface of the sound-absorbing member 2 to the back of the gas water heater 3 is constant, avoiding the sound-absorbing member 2 from being compressed or blocking the air inlet passage 4 due to expansion, and ensuring the air intake effect and noise reduction effect of the air inlet passage 4.

[0069] Specifically, the mesh plate 6 can be detachably arranged on the back shell 1 by means of fastener connection, and can also be detachably arranged on the back shell 1 by means of snap connection. In the embodiments of the present application, the detachable connection method between the mesh plate 6 and the back shell 1 is not specifically limited.

[0070] Specifically, the mesh plate 6 and the back shell 1 can be arranged in parallel or obliquely. In the embodiments of the present application, the positional relationship between the mesh plate 6 and the back shell 1 is not specifically limited.

[0071] In one embodiment, in combination with Figure 8 and Figure 9As shown, a plurality of bayonet joints 102 are provided on the side wall 104 of the back shell 1, and the circumferential edge of the net plate 6 is provided with engaging portions 601 corresponding to the bayonet joints 102 one by one. By inserting the engaging portions 601 into the bayonet joints 102, a detachable connection between the net plate 6 and the back shell 1 can be achieved.

[0072] Moreover, by providing the bayonet joints 102 on the side wall 104 of the back shell 1 and providing the engaging portions 601 correspondingly on the circumferential side of the net plate 6, the installation of the net plate 6 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, the net plate 6 can be quickly disassembled, improving the maintenance efficiency. The snap-fit design can prevent the loosening of components due to vibration or impact, improving the use safety.

[0073] It should be noted that the bayonet joints 102 and the engaging portions 601 can also be interchangeably arranged, that is to say, the bayonet joints 102 can also be provided on the net plate 6, and the engaging portions 601 are correspondingly provided on the back shell 1, or both the bayonet joints 102 and the engaging portions 601 are provided on the circumferential side of the net plate 6.

[0074] Specifically, the bayonet joints 102 are provided in the middle area of the circumferential side of the side wall 104 of the back shell 1, and the position of the bayonet joints 102 is also the installation position of the net plate 6. The distance formed between the net plate 6 and the back surface of the gas water heater 3 is the air inlet channel 4.

[0075] In one embodiment, as Figure 8 shown, the net plate 6 has a plurality of first strip-shaped holes 602, and the length direction of the first strip-shaped holes 602 is arranged parallel to the length direction of the net plate 6.

[0076] By providing a plurality of first strip-shaped holes 602 on the net plate 6, since the length direction of the first strip-shaped holes 602 is parallel to the length direction of the net plate 6, the probability of contact between the noise sound waves in the air inlet channel 4 and the net plate 6 is reduced, and the probability of contact between the noise sound waves in the air inlet channel and the sound-absorbing member 2 is increased, thereby improving the sound absorption effect and more effectively absorbing and reducing noise. At the same time, the first strip-shaped holes 602 provide additional rigidity to the net plate 6, enhancing the stability of the overall structure and reducing vibration and distortion.

[0077] Specifically, the first strip-shaped holes 602 can be set in a rectangular shape, an oval shape, etc. In the embodiments of the present application, the shape of the first strip-shaped holes 602 is not specifically limited.

[0078] Exemplarily, as Figure 8 shown, the first strip-shaped holes 602 are set in a rectangular shape, and a plurality of first strip-shaped holes 602 can be arranged in parallel.

[0079] In one embodiment, as Figure 9As shown, the back shell 1 includes a back plate 103, side walls 104, and a flanging 105. The side walls 104 are disposed around the periphery of the back plate 103, and the flanging 105 is disposed around the side walls 104. Mounting holes 1051 are provided on the flanging 105, and the back shell 1 is mounted on the back of the gas water heater 3 by assembling fasteners in the mounting holes 1051. An installation groove 101 is formed between the back plate 103 and the side walls 104, and an external air inlet structure 5 is provided on the side walls 104.

[0080] It can be understood that the side walls 104 are provided on the periphery of the back plate 103, so that an installation groove 101 is formed between the side walls 104 and the back plate 103, which is convenient for the production and manufacture of the back shell 1. The mounting holes 1051 on the flanging 105 cooperate with the fasteners to stably assemble the back shell 1 on the back of the gas water heater 3, which is convenient for installing the back shell 1 on the gas water heater 3 and ensures the stability of the entire structure, so that there will be no shaking or loosening even when the device is running.

[0081] Specifically, the mounting holes 1051 can be through holes, threaded holes, snap holes, etc. In the embodiments of the present application, the type of the mounting holes 1051 is not specifically limited.

[0082] Specifically, the back plate 103, the side walls 104, and the flanging 105 can be integrally formed by stamping. In the embodiments of the present application, the manufacturing method of the back shell 1 is not specifically limited.

[0083] Specifically, as Figure 9 shown, reinforcing ribs 106 can also be provided on the back plate 103 to enhance the self-strength of the back plate 103. The reinforcing ribs 106 can be provided inside the installation groove 101, which can provide a certain frictional force to the side surface of the sound-absorbing member 2 and ensure that the sound-absorbing member 2 is more firmly arranged on the back plate 103.

[0084] Specifically, the flanging 105 fits with the back of the gas water heater 3, and a sealing strip can also be provided between the flanging 105 and the back of the gas water heater 3 to ensure the sealing performance at the connection between the back shell 1 and the back of the gas water heater 3.

[0085] In one embodiment, the sound-absorbing member 2 is sound-absorbing cotton, and the sound-absorbing cotton adopts at least one high-efficiency sound-absorbing material, including polyester fiber cotton, bicomponent cotton or melamine cotton.

[0086] The sound-absorbing member 2 adopts polyester fiber cotton, which has a good sound-absorbing effect and can effectively absorb medium and high-frequency sounds.

[0087] The sound-absorbing member 2 adopts 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 anti-compression deformation ability to maintain long-term sound-absorbing performance.

[0088] The sound-absorbing member 2 is made of melamine cotton, which is suitable for use in high-temperature environments and can provide good sound-absorbing effects, especially in absorbing high-frequency noise.

[0089] Specifically, the material of the sound-absorbing member 2 can be customized according to the specific application environment and noise reduction requirements of the gas water heating device 3 to achieve the best sound-absorbing effect and durability. In the embodiments of the present application, no specific limitation is imposed on the material of the sound-absorbing member 2.

[0090] Specifically, the bicomponent cotton can be selected as polypropylene (PP) and polyethylene terephthalate (PET) bicomponent cotton.

[0091] According to an embodiment of the present utility model, on the other hand, in combination with Figure 3 and Figure 4 as shown, a gas water heating device is also provided, which includes a housing 301 and a noise reduction component.

[0092] Specifically, as Figure 4 shown, the back shell 1 of the noise reduction component is installed on the back surface of the housing 301 of the gas water heating device 3. The housing 301 has an air inlet 302. The external air inlet structure 5 and the back surface of the housing 301 enclose to form an external air inlet. The air inlet 302 and the external air inlet structure 5 are arranged vertically. An air inlet passage 4 is left between the sound-absorbing member 2 and the back surface of the housing 301 (as Figure 5 shown). The air inlet passage 4 is respectively communicated with the external air inlet and the air inlet 302 of the gas water heating device 3.

[0093] It should be noted that the back surface of the gas water heating device 3 refers to the side that contacts the wall. When installing the gas water heating device 3, the back surface usually faces the wall, while the front surface faces the user.

[0094] For this gas water heating device, the gas water heating device 3 provided with this noise reduction component has significantly better noise reduction effect compared with the existing gas water heating devices. The back shell 1 is directly fixed on the back surface of the housing 301 of the gas water heating device 3. The air inlet space 9 leaves a gap between the sound-absorbing member 2 and the back surface of the housing 301. This gap forms the air inlet passage 4. The air inlet passage 4 is respectively communicated with the external air inlet structure 5 and the air inlet 302, thereby completing the installation of the entire noise reduction component, and the installation is convenient. The air inlet 302 is arranged away from the external air inlet structure 5, so that after the noise enters the air inlet passage 4 from the air inlet 302, it needs to pass through a longer path in the air inlet passage 4 to reach the external air inlet structure 5, increasing the number of reflections of the noise sound wave passing through the sound-absorbing member 2 in the air inlet passage 4, thereby enhancing the sound absorption effect of the sound-absorbing member 2 on the noise, effectively reducing the noise generated during the operation of the gas water heating device 3, and improving the user's comfort.

[0095] It should be noted that the type of the gas water heating device 3 can be a gas water heater, a gas wall-mounted boiler, etc. In the embodiments of the present application, the type of the gas water heating device 3 is not specifically limited.

[0096] In one embodiment, as Figure 4 shown, the covering area of the sound-absorbing member 2 is adapted to the area of the back surface of the housing 301.

[0097] The covering area of the back shell 1 is set to match the size of the back surface of the housing 301, ensuring that the entire area of the back surface of the housing 301 is covered by the sound-absorbing member 2, so as to absorb both the transmitted sound of the gas water heating device 3 and the reflected sound of the wall, thereby more effectively absorbing the noise in the air intake passage 4, improving the sound absorption efficiency, reducing the noise propagation, and enhancing the overall noise reduction effect. At the same time, selecting a sound-absorbing member 2 with an adapted size makes the sound-absorbing member 2 easier to install and fix, reducing the complexity in the installation process.

[0098] Specifically, as Figure 4 shown, the back surface of the housing 301 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 301 to ensure the sound absorption effect of the sound-absorbing member 2 and facilitate the installation of the sound-absorbing member 2. Therefore, the overall shape and the covering area size of the sound-absorbing member 2 can be adaptively adjusted according to the shape of the back surface of the housing 301. In the embodiments of the present application, the shape and the area size of the sound-absorbing member 2 are not specifically limited.

[0099] In one embodiment, in combination with Figure 4 and Figure 5 shown, the air inlet 302 of the gas water heating device 3 is usually arranged at the upper position of the back surface of the housing 301. Therefore, the external air inlet structure 5 of this embodiment is arranged at the lower side of the back shell 1, so that the distance between the air inlet 302 and the external air inlet structure 5 is long enough to ensure a sufficiently long air intake passage 4.

[0100] The air inlet 302 of the gas water heating device 3 is arranged near the upper side of the air inlet passage 4, while the external air inlet structure 5 is arranged near the lower side of the air inlet passage 4. The distance from the air inlet 302 to the external air inlet structure 5 is as long as possible, so that after the noise enters the air inlet passage 4 from the air inlet 302, it needs to pass through a relatively long path in the air inlet passage 4 to reach the external air inlet structure 5. Since the distance of the noise sound wave in the air inlet passage 4 from the air inlet 302 to the external air inlet structure 5 is relatively long, the number of reflections of the noise sound wave passing through the sound absorption member 2 in the air inlet passage 4 can be increased, thereby improving the absorption effect of the sound absorption member 2 on the noise, effectively reducing the noise generated during the operation of the gas water heating device 3, and reducing the impact of the noise on the user. In addition, the outside air enters the interior of the gas water heating device 3 from the air inlet 302 at the top of the housing 301, and then the air flow flows downward from the top of the gas water heating device 3, and can effectively dissipate heat from the electrical components inside the gas water heating device 3 during the air flow process.

[0101] Specifically, in combination with Figure 4 and Figure 5 as shown, the length of the air inlet passage 4 can be similar to the length of the back surface of the housing 301, the width of the air inlet passage 4 can be similar to the width of the back surface of the housing 301, and the length and width of the air inlet passage 4 can be adaptively adjusted according to the back surface size of the housing 301. In the embodiment of the present application, the length and width of the air inlet passage 4 are not specifically limited.

[0102] Specifically, the air inlet passage 4 should ensure that the outside air can smoothly enter the gas water heating device 3. As Figure 7 shown, the cross-section of the air inlet passage 4 in this embodiment is rectangular. Assuming the perimeter of the rectangle is C and the area is S, while ensuring the smooth intake of the gas water heating device 3, and when the length L of the rectangle is close to the width of the gas water heating device 3 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 passage 4 is too small, the intake resistance increases, and the DC fan of the gas water heating device 3 will speed up, resulting in an increase in noise. When the cross-sectional area S of the air inlet passage 4 is too small, the noise coming out of the external air inlet structure 5 will increase. Therefore, the ratio of C / S needs to be appropriately adjusted according to the different power models and noise characteristics of the gas water heating device 3.

[0103] Specifically, in combination with Figure 4 、 Figure 5 and Figure 9 as shown, the external air inlet structure 5 extends along the width direction of the back shell 1 to both sides of the back shell 1, ensuring that the opening area of the external air inlet structure 5 is large enough to ensure the air intake volume of the gas water heating device 3.

[0104] In one embodiment, as Figure 8As shown, a second strip-shaped hole 603 is further provided on the wire mesh plate 6. The position of the second strip-shaped hole 603 corresponds to the position of the air inlet 302 of the gas water heating device 3, and the arrangement density of the second strip-shaped holes 603 is greater than that of the first strip-shaped holes 602.

[0105] By providing the second strip-shaped hole 603 at the position corresponding to the air inlet 302 on the wire mesh plate 6, since the arrangement density of the second strip-shaped holes 603 is greater than that of the first strip-shaped holes 602, the second strip-shaped holes 603 on the wire mesh plate 6 can better press the sound-absorbing member 2 relative to the first strip-shaped holes 602, preventing the sound-absorbing member 2 at the inlet and outlet from passing through the second strip-shaped holes 603 to compress or block the air inlet passage 4, ensuring that the ventilation area of the air inlet passage 4 at the air inlet 302 is relatively large, and ensuring that the gas water heating device 3 can obtain sufficient air supply while ensuring the sound absorption and noise reduction of the sound-absorbing member 2.

[0106] It should be noted that the arrangement density of the second strip-shaped holes 603 being greater than that of the first strip-shaped holes 602 can be understood as the opening area of the second strip-shaped holes 603 being smaller than that of the first strip-shaped holes 602.

[0107] Specifically, the second strip-shaped hole 603 can also be set in a rectangular, oval shape, etc. In the embodiment of the present application, the shape of the second strip-shaped hole 603 is not specifically limited.

[0108] Specifically, the arrangement manner of the second strip-shaped holes 603 on the wire mesh plate 6 can be adaptively adjusted according to the arrangement manner of the air inlets 302. In the embodiment of the present application, the arrangement manner of the second strip-shaped holes 603 is not specifically limited.

[0109] Specifically, a plurality of first strip-shaped holes 602 or second strip-shaped holes 603 can be formed on the wire mesh plate 6 by cross-setting vertical ribs and horizontal ribs, and reinforcing ribs can also be provided on the vertical ribs and horizontal ribs to enhance the overall strength of the wire mesh plate 6.

[0110] The working principle of the gas water heating device 3 in this embodiment is described as follows:

[0111] For example, first, the sound-absorbing member 2 is bonded to the inner wall surface of the installation groove 101, and then the clamping portions 601 on the periphery of the wire mesh plate 6 are inserted into the bayonet 102, so that the sound-absorbing member 2 is clamped between the wire mesh plate 6 and the back shell 1. Then, bolts are passed through the installation holes 1051 of the flanging 105 to stably assemble the back shell 1 on the back of the shell 301 of the gas water heating device 3.

[0112] During the operation of the gas water heating device 3, external air can enter the air inlet passage 4 from the external air inlet structure 5 and enter the air inlet 302 of the gas water heating device 3 along the path of the air inlet passage 4, ensuring the air circulation inside the gas water heating device 3 and ensuring that the gas water heating device 3 can burn sufficiently.

[0113] During the operation of the gas water heating device 3, part of the generated noise diffracts out through the air inlet 302 of the gas water heating device 3. Since the air inlet 302 of the gas water heating device 3 is arranged on the upper side close to the air inlet passage 4, and the external air inlet structure 5 is arranged on the lower side close to the air inlet passage 4, after the noise enters the air inlet passage 4 from the air inlet 302, it needs to pass through a longer path in the air inlet passage 4 to reach the external air inlet structure 5, which can increase the number of reflections of the noise sound wave in the air inlet passage 4 through the sound-absorbing member 2 and the gas water heating device 3, thereby improving the absorption effect of the sound-absorbing member 2 on the noise and reducing the leakage amount of the internal noise of the gas water heating device 3 from the external air inlet structure 5.

[0114] To better illustrate the noise reduction effect of the gas water heating device 3, the following experimental test is taken as an example:

[0115] 1. Experimental conditions:

[0116] Taking the gas water heater as an example of the gas water heating device 3, the experimental test is carried out in a semi-anechoic chamber 7 (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:

[0117] According to the experimental requirements of the national standard GB6932-2015 for gas instantaneous water heaters, as Figure 11 shown, sound pressure level measurement points 8 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.

[0118] 2. Test scheme:

[0119] Three groups of experiments are tested. The whole machine is suspended on the vertical wall surface of the experimental bench. Experiment 1 is the control group, that is, no noise reduction measures are taken at the rear of the whole machine of the water heater. Experiment 2 is to set only a single-layer metal back plate at the rear of the whole machine. Experiment 3 is to adopt the structural scheme of adding a sound-absorbing cotton to the back shell in this application, and the sound-absorbing cotton covers the back of the shell of the gas water heating device.

[0120] 3. Experimental results:

[0121]

[0122] It can be seen that compared with the gas water heating device without using the noise reduction component, the noise of the gas water heating device adopting the noise reduction component of this application has decreased by 7-8 decibels, and the noise reduction effect is remarkable.

[0123] In the specific content of the above specific embodiments, 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 combinations of these technical features do not conflict, they should all be considered as the scope recorded in this specification.

[0124] The specific content of the above specific embodiments only expresses several embodiments of the present utility model, and its description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the patent of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model. Therefore, the protection scope of the patent of the present utility model should be subject to the appended claims.

Claims

1. A noise reduction component for a gas water heating device (3), characterized in that Comprising: A back shell (1) having a mounting groove (101) and an external air inlet structure (5); A sound-absorbing member (2) disposed in the mounting groove (101), the front surface of the sound-absorbing member (2) facing away from the inner bottom surface of the mounting groove (101), and an air inlet space (9) left between the front surface of the sound-absorbing member (2) and the opening (107) of the back shell (1), the external air inlet structure (5) communicating with the air inlet space (9).

2. The noise reduction component according to claim 1, characterized in that: The external air inlet structure (5) is disposed on the side wall of the back shell (1) around the outer periphery of the bottom surface of the groove connecting the mounting groove (101).

3. The noise reduction component according to claim 1, wherein: It further includes a mesh plate (6), the mesh plate (6) being detachably connected to the back shell (1) and clamping the sound-absorbing member (2) between the mesh plate (6) and the back shell (1); and / or, the sound-absorbing member (2) is adhesively fixed to the bottom surface of the mounting groove (101).

4. The noise reduction component according to claim 3, wherein: A plurality of bayonets (102) are provided on the peripheral side of the side wall (104) of the back shell (1), a plurality of corresponding clamping portions (601) are provided on the peripheral side of the mesh plate (6), and the mesh plate (6) and the back shell (1) are detachably connected by clamping the clamping portions (601) in the bayonets (102).

5. The noise reduction component according to claim 3, wherein: The mesh plate (6) has a plurality of first strip-shaped holes (602), and the length direction of the first strip-shaped holes (602) is consistent with the length direction of the mesh plate (6).

6. The noise reduction component according to any one of claims 1 to 5, characterized in that: The back shell (1) includes a back plate (103), a side wall (104) disposed around the periphery of the back plate (103), and a flange (105) disposed around the side wall (104), the flange (105) being provided with mounting holes (1051), the mounting groove (101) being formed between the back plate (103) and the side wall (104), and the side wall (104) being provided with the external air inlet structure (5).

7. The noise reduction component according to any one of claims 1 to 5, characterized in that: The sound-absorbing member (2) is covered and attached to the bottom surface of the mounting groove (101).

8. The noise reduction component according to any one of claims 1 to 5, characterized in that: The sound-absorbing member (2) is sound-absorbing cotton, and the sound-absorbing cotton is one of polyester fiber cotton, bicomponent cotton or melamine cotton.

9. A gas water heating device, characterized in that, Comprising: A housing (301) and The noise reduction assembly according to any one of claims 1 to 8; the housing (301) has an air inlet (302); the back shell (1) covers the back surface of the housing (301), the air inlet (302) and the external air inlet structure (5) are arranged vertically, and an air inlet channel (4) is left between the sound-absorbing member (2) and the back surface of the housing (301), and the external air inlet structure (5) communicates with the air inlet (302) through the air inlet channel (4).

10. The gas water heating device according to claim 9, characterized in that: The covering area of the back shell (1) is adapted to the area of the back surface of the housing (301).

11. The gas water heating device according to claim 9, characterized in that: The air inlet (302) is located on the upper side of the back surface of the housing (301), and the external air inlet structure (5) is located on the lower side of the back shell (1).

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