Noise reduction assembly and heat pump water heating equipment

Abstract

The utility model relates to the technical field of hot water supply equipment, and discloses a noise reduction assembly and heat pump hot water equipment, the noise reduction assembly mainly comprises a sleeve, and a first net cylinder, a second net cylinder and a sound absorption cylinder which are arranged in the sleeve, one end of the sleeve is provided with a first air port, and the other end of the sleeve is provided with an end cover; the end cover comprises an annular cover body, a second air opening formed in the outer ring of the annular cover body and a third air opening formed in the inner ring of the annular cover body. A first annular cavity is reserved between the first net cylinder and the sleeve, a net plate is arranged at the end, away from the annular cover body, of the first net cylinder, the first net cylinder is located in the second net cylinder, a second annular cavity is formed between the first net cylinder and the second net cylinder, the sound absorption column body is inserted into the second annular cavity, and one end of the sound absorption column body abuts against the net plate. The first air opening communicates with the first annular cavity and the second air opening. Leakage noise of the air inlet or the air outlet of the heat pump hot water equipment is absorbed through the sound absorption column body, the noise reduction effect is remarkable, and the use experience is better.

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 heat pump hot water equipment. Background Art

[0002] A heat pump water heater utilizes heat pump technology to heat water. It extracts heat from the surrounding environment (such as the air, ground, or water) and transfers it to the water. Compared to traditional electric or gas water heaters, heat pump water heaters offer greater energy efficiency, saving energy and reducing operating costs.

[0003] In existing technologies, noise from heat pump water heaters primarily comes from compressor noise, piping noise, and fan noise. Heat pump water heaters typically feature a soundproofing housing, but this noise can easily leak out through the air inlet and outlet, reaching the user's ears and resulting in a poor user experience. Utility Model Content

[0004] The first technical problem solved by the present invention is to provide a noise reduction component, which effectively solves the problem that the noise of the heat pump water heating equipment easily leaks from the air inlet and outlet, resulting in loud noise and poor user experience. Installing the noise reduction component at the air inlet and / or air outlet of the heat pump water heating equipment can significantly reduce the leakage noise of the air inlet and / or air outlet of the heat pump water heating equipment, and provide a better user experience.

[0005] The second technical problem solved by the present invention is to provide a heat pump water heating device, which effectively solves the problem that the noise of the heat pump water heating device easily leaks from the air inlet and outlet, resulting in loud noise and poor user experience. By installing a noise reduction component at the air inlet and / or outlet of the heat pump water heating device, the leakage noise of the air inlet and / or outlet of the heat pump water heating device can be significantly reduced, and the user experience is better.

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

[0007] The air filter assembly of claim 1, wherein the air filter is configured to extend over the first and second air filter elements and to provide a seal between the air filter element and the air filter element. The air filter element is configured to extend over the first and second air filter elements and to provide a seal between the air filter element and the air filter element.

[0008] Compared with the background technology, the noise reduction component described in the present invention has the following beneficial effects: taking a heat pump water heater as an example, when using the noise reduction component, the noise reduction component is installed on the air inlet and / or air outlet of the heat pump water heater. When the heat pump water heater is running, the air inlet or air outlet of the heat pump water heater is connected to the first air outlet, the first air outlet is connected to the first annular cavity and the second air outlet to form a first air duct, and the axial through hole of the second mesh tube is connected to the first air outlet and the third air outlet to form a second air duct. When the leakage noise of the air inlet or air outlet passes through the first air duct and the second air duct, it is absorbed by the sound-absorbing column, thereby significantly reducing the leakage noise of the air inlet and / or air outlet of the heat pump water heater and improving the user experience. At the same time, by setting the mesh plate, on the one hand, the mesh plate supports the sound-absorbing column, making it easier to assemble the sound-absorbing column; on the other hand, the mesh plate is also provided with mesh holes, which can play a role of turbulence to a certain extent, which is conducive to noise reduction.

[0009] In one embodiment, the mesh plate is provided with a central through hole, and the second mesh tube is arranged around the central through hole at one end facing the mesh plate and abuts against the peripheral side of the mesh plate.

[0010] In one embodiment, a plurality of connecting ears are provided at intervals on the outer side wall of the first net cylinder close to one end of the annular cover body, and the annular cover body is connected to the connecting ears via a first fastener.

[0011] In one embodiment, the inner wall of the annular cover extends toward the inner wall of the second mesh tube to form a sunken platform, and the sunken platform and the first mesh tube jointly clamp the second mesh tube and the sound-absorbing column.

[0012] In one embodiment, a grille is further provided at the third air outlet, and the peripheral side of the grille is connected to the sinking platform.

[0013] In one embodiment, the end cover further includes a plurality of reinforcing ribs spaced apart along the outer wall of the annular cover and extending radially. The plurality of reinforcing ribs are provided at the second air outlet and divide the second air outlet into a plurality of sub-air outlets.

[0014] In one embodiment, the end cover also includes a flange arranged around the outer side of the second air outlet, and a plurality of first mounting holes are provided at intervals on the flange. The sleeve is provided with second mounting holes corresponding to the first mounting holes one by one, and the sleeve is connected to the flange by a second fastener passing through the first mounting hole and the second mounting hole.

[0015] In one embodiment, the flange is connected to a plurality of the reinforcing ribs respectively, and a plurality of the first mounting holes are provided on at least a portion of the reinforcing ribs.

[0016] In one embodiment, the sound-absorbing column is sound-absorbing cotton, and the sound-absorbing cotton is made of at least one of melamine cotton, bicomponent cotton and glass fiber cotton.

[0017] The second technical problem mentioned above is solved by the following technical solution:

[0018] A heat pump water heating device, comprising:

[0019] A housing, provided with an air inlet and an air outlet;

[0020] At least one of the above-mentioned noise reduction components, at least one of the noise reduction components is arranged outside the shell and corresponds to the air inlet and / or the air outlet, and the first air outlet of the sleeve is connected to the air inlet or the air outlet.

[0021] Compared to the prior art, the heat pump water heater described in this utility model has the following advantages: The heat pump water heater equipped with this noise reduction assembly utilizes the sound-absorbing column to absorb leakage noise from the air inlet and / or outlet, significantly reducing noise compared to existing heat pump water heaters and providing a superior user experience. Furthermore, the sound-absorbing column is supported by the first mesh tube, the second mesh tube, the mesh plate, and the annular cover, facilitating its installation and fixation. The openings in the mesh plate also serve as a flow disruptor, further reducing noise. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a schematic structural diagram of a heat pump water heating device according to an embodiment of the present invention;

[0024] Figure 2 This is a schematic structural diagram of a heat pump water heater and a noise reduction component separated from each other in an embodiment of the present invention;

[0025] Figure 3 This is a schematic structural diagram of a noise reduction component according to an embodiment of the present utility model;

[0026] Figure 4 for Figure 3 Partial exploded view;

[0027] Figure 5 for Figure 3 Exploded diagram;

[0028] Figure 6 for Figure 3 Exploded view from another perspective;

[0029] Figure 7 This is a structural diagram of the end cover and the second net cylinder of the noise reduction assembly of an embodiment of the utility model;

[0030] Figure 8 A cross-sectional view of a noise reduction assembly according to an embodiment of the present invention;

[0031] Figure 9 for Figure 8 A magnified view of point A;

[0032] Figure 10 This is a structural diagram of a heat pump water heater according to an embodiment of the present invention without a noise reduction component installed;

[0033] Figure 11 This is a structural diagram of a heat pump water heating device according to another embodiment of the present invention.

[0034] Description of reference numerals:

[0035] 1. Sleeve; 101. First air outlet; 102. Second mounting hole; 2. First mesh tube; 201. Connecting ear; 3. Second mesh tube; 301. Axial through hole; 4. Sound-absorbing column; 5. End cover; 501. Annular cover; 5011. Connecting hole; 502. Second air outlet; 5021. Sub-air outlet; 503. Third air outlet; 504. Sink; 505. Grille; 506. Reinforcement rib; 507. Flanged edge; 508. First mounting hole; 6. First annular cavity; 7. Mesh plate; 8. Shell; 801. Air inlet; 802. Air outlet. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0037] In the description of this application, it should be understood that the terms "center", "up", "down", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on this application.

[0038] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of such features. Throughout this application, unless otherwise specified, "plurality" means two or more.

[0039] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0040] The following combination Figures 1 to 11 , describing the embodiments of the present utility model.

[0041] According to an embodiment of the present invention, on the one hand, a noise reduction component is provided, which mainly includes a sleeve 1 and a first mesh tube 2, a second mesh tube 3 and a sound-absorbing column 4 arranged in the sleeve 1.

[0042] The noise reduction component mentioned in this embodiment is mainly used in heat pump water heating equipment. Figure 1 and Figure 2 As shown, a noise reduction component is provided on the air inlet 801 or the air outlet 802 of the heat pump water heater to reduce leakage noise from the air inlet 801 or the air outlet 802 of the heat pump water heater. A pair of noise reduction components can be provided on the heat pump water heater, one mounted on the air inlet 801 and one mounted on the air outlet 802, to further reduce noise.

[0043] Furthermore, if Figures 3 to 6 As shown, the sleeve 1 is provided with a first air port 101 at one end and an end cap 5 at the other end. The first air port 101 is connected to the air inlet 801 or the air outlet 802. The end cap 5 includes an annular cover 501, a second air port 502 located on the outer ring of the annular cover 501, and a third air port 503 located on the inner ring of the annular cover 501. A gap exists between the outer wall of the first mesh tube 2 and the inner wall of the sleeve 1, forming a first annular cavity 6.

[0044] like Figure 4 As shown, a mesh plate 7 is provided at one end of the first mesh tube 2 away from the annular cover body 501. The first mesh tube 2 is located inside the second mesh tube 3 and there is a distance between the outer wall of the first mesh tube 2 and the inner wall of the second mesh tube 3 to form a second annular cavity. The sound-absorbing column 4 is inserted into the second annular cavity and one end abuts against the mesh plate 7. The first air port 101 is connected with the first annular cavity 6 and the second air port 502 to form a first flow channel. The axial through hole 301 of the second mesh tube 3 is connected with the first air port 101 and the third air port 503 to form a second flow channel. The axial through hole 301 of the second mesh tube 3 is as shown Figure 7 shown.

[0045] Thus, it can be seen that the noise reduction assembly provided by the embodiment of the present invention is such that, when the heat pump water heater is in operation, the air inlet 801 or air outlet 802 of the heat pump water heater is connected to the first air outlet 101, the first air outlet 101 is connected to the first annular cavity 6 and the second air outlet 502 to form a first air duct, and the axial through hole 301 of the second mesh tube 3 is connected to the first air outlet 101 and the third air outlet 503 to form a second air duct. When leakage noise from the air inlet 801 or air outlet 802 passes through the first and second air ducts, it is absorbed by the sound-absorbing column 4, thereby significantly reducing the leakage noise from the air inlet 801 and / or air outlet 802 of the heat pump water heater and improving the user experience. At the same time, by providing the mesh plate 7, on the one hand, the mesh plate 7 supports the sound-absorbing column 4, facilitating its assembly; on the other hand, the mesh plate 7 is also provided with mesh holes, which can, to a certain extent, act as a flow turbulent, thereby facilitating noise reduction.

[0046] Specifically, the first mesh tube 2 and the second mesh tube 3 are both fixedly connected to the end cover 5 , so the mesh plate 7 can be connected to the second mesh tube 3 or leave a gap with the second mesh tube 3 , as long as the mesh plate 7 can support the sound-absorbing column 4 .

[0047] In one embodiment, Figure 4 As shown, the mesh plate 7 is provided with a central through hole, and the second mesh tube 3 is arranged around the central through hole toward one end of the mesh plate 7 and abuts against the peripheral side of the mesh plate 7. At this time, the mesh plate 7 can also limit the first mesh tube 2 and the second mesh tube 3 to improve the structural stability of the first mesh tube 2 and the second mesh tube 3.

[0048] It should be noted that the embodiment of the present invention does not limit the fixed connection method of the first mesh tube 2 and the second mesh tube 3 and the end cover 5. It can be a snap-on fixed structure, such as connected by a snap-on slot for quick installation, or it can be set as a fastener-type fixed structure, such as fixed by adhesive bonding, for stable connection.

[0049] In one embodiment, Figure 4 and Figure 5 As shown, the outer wall of the first net tube 2 near one end of the annular cover 501 is spaced apart with a plurality of connecting ears 201. The annular cover 501 is connected to the connecting ears 201 by a first fastener, which can avoid drilling screw holes on the first net tube 2 and facilitate the connection between the first net tube 2 and the annular cover 501.

[0050] It should be noted that the embodiment of the present invention does not limit the specific structure of the first fastener. Figure 4 and Figure 5 As shown, the annular cover 501 is provided with a plurality of connection holes 5011, and the first fasteners are provided in a one-to-one correspondence with the plurality of connection holes 5011. The first fasteners include screws and nuts, and each connection ear 201 is provided with a groove for receiving a nut. The screws penetrate the annular cover 501 and are threadedly connected to the connection holes 5011 and the nuts to secure the annular cover 501 to the first net cylinder 2. For example, the first fasteners can also be screws that directly penetrate the annular cover 501 and the connection ears 201 to achieve a fixed connection between the annular cover 501 and the first net cylinder 2.

[0051] In one embodiment, Figure 8 and Figure 9 As shown, the inner wall of the annular cover 501 extends toward the inner wall of the second mesh tube 3 to form a sink 504 . The sink 504 and the first mesh tube 2 together clamp the second mesh tube 3 and the sound-absorbing column 4 to improve the structural stability of the sound-absorbing column 4 .

[0052] Furthermore, in one embodiment, Figure 3 、 Figure 5 and Figure 9 As shown, a grille 505 is further provided at the third air outlet 503, and the periphery of the grille 505 is connected to the sinking platform 504. The grille 505 can be integrally formed with the sinking platform 504 to reduce manufacturing and installation difficulties. The grille 505 is used to protect the second mesh drum 3 and prevent foreign matter from entering the axial through hole 301 of the second mesh drum 3.

[0053] In one embodiment, Figure 3 and Figure 5As shown, the end cover 5 further includes a plurality of reinforcing ribs 506 spaced apart and extending radially along the outer wall of the annular cover body 501. The plurality of reinforcing ribs 506 are provided at the second air inlet 502 and divide the second air inlet 502 into a plurality of sub-air inlets 5021. The reinforcing ribs 506 are used to increase the structural strength of the end cover 5 and prevent foreign matter from entering the first annular cavity 6 through the second air inlet 502.

[0054] Furthermore, in one embodiment, Figure 3 and Figure 4 As shown, the end cap 5 further includes a flange 507 disposed around the outer side of the second air outlet 502. The flange 507 defines a plurality of first mounting holes 508 at intervals. The sleeve 1 is provided with second mounting holes 102 corresponding one-to-one with the first mounting holes 508. The sleeve 1 is securely connected to the flange 507 by second fasteners passing through the first mounting holes 508 and the second mounting holes 102. The second fasteners can be conventional fasteners such as screws and bolts.

[0055] Furthermore, in one embodiment, Figures 3 to 5 As shown, the flange 507 is connected to the plurality of reinforcing ribs 506, and the plurality of first mounting holes 508 are provided on at least some of the reinforcing ribs 506. The flange 507, the plurality of reinforcing ribs 506, and the annular cover 501 can be integrally formed to reduce manufacturing and installation difficulties. When installing the second fastener, the second fastener passes through the first mounting hole 508 and then extends along the reinforcing rib 506. In other words, the second fastener is disposed within the reinforcing rib 506 to prevent the second fastener from affecting the airflow in the first annular cavity 6. This also reduces the space occupied by the second fastener and the first mounting hole 508.

[0056] It should be noted that the present embodiment does not restrict the material of the sound-absorbing column 4; any existing material may be selected as needed. To reduce operating costs, in one embodiment, the sound-absorbing column 4 is made of sound-absorbing cotton, which is made of at least one of melamine cotton, bicomponent cotton, and glass fiber cotton. Bicomponent cotton, for example, is PP+PET (polyethylene terephthalate and polypropylene) bicomponent cotton.

[0057] Furthermore, the embodiments of the present invention do not restrict the materials of the sleeve 1, first mesh tube 2, second mesh tube 3, mesh plate 7, and end cap 5. For example, the sleeve 1, first mesh tube 2, and mesh plate 7 can be made of injection molding material. The first mesh tube 2 and mesh plate 7 are integrally formed. The injection molding material includes at least one of PVC (polyvinyl chloride), ABS (acrylonitrile-butadiene-styrene copolymer), and PPS (polyphenylene sulfide). The second mesh tube 3 and end cap 5 can be made of sheet metal, and thus the second mesh tube 3 can also be welded to the end cap 5.

[0058] According to an embodiment of the present invention, on the other hand, Figure 1 and Figure 2 As shown, a heat pump water heating device is also provided, which mainly includes: a shell 8 and at least one noise reduction component.

[0059] Furthermore, the housing 8 is provided with an air inlet 801 and an air outlet 802. At least one noise reduction component is provided outside the housing 8 and is provided corresponding to the air inlet 801 and / or the air outlet 802. The first air port 101 of the sleeve 1 is connected to the air inlet 801 or the air outlet 802. Figure 10 As shown, the air inlet 801 and the air outlet 802 are arranged on the top of the shell 8.

[0060] The heat pump water heater equipped with this noise reduction assembly utilizes the sound-absorbing column 4 to absorb leakage noise from the air inlet 801 and / or air outlet 802. Compared to existing heat pump water heaters, this achieves significantly improved noise reduction and provides a superior user experience. Furthermore, the sound-absorbing column 4 is supported by the first mesh tube 2, the second mesh tube 3, the mesh plate 7, and the annular cover 501, facilitating its installation and securement. The openings in the mesh plate 7 also provide a disruptive effect, further reducing noise.

[0061] It should be noted that one or two noise reduction components can be selected. Figure 11 As shown, a noise reduction component is provided and installed on the air inlet 801, and the air outlet 802 is connected to the air outlet duct to reduce the leakage noise at the air inlet 801. Figure 2 As shown, two noise reduction components are provided, and the two noise reduction components are provided on the air inlet 801 and the air outlet 802 respectively to reduce leakage noise at the air inlet 801 and the air outlet 802 .

[0062] Of course, in some other examples, the number of noise reduction components can be set to three or more as needed.

[0063] As shown in Table 1, this embodiment of the present invention provides a comparison of noise data from heat pump water heaters before and after the noise reduction component is installed. Experimental testing was conducted in a semi-anechoic chamber with a noise floor of less than 20 dB(A). Test probes were placed 1 meter from the top and 1 meter from the front of the housing 8 (typically where the user is located), producing three sets of comparative data.

[0064] Table 1 Comparison of noise data before and after the installation of noise reduction components in heat pump water heating equipment

[0065]

[0066] It can be seen that after the heat pump hot water equipment is installed with noise reduction components, the noise is reduced by about 2 decibels compared to when no noise reduction components are installed, and the noise reduction effect is significant.

[0067] In the specific contents of the above-mentioned specific implementation methods, the various technical features can be combined in any non-contradictory manner. In order to make the description concise, not all possible combinations of the above-mentioned technical features are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0068] The specific contents of the above-mentioned specific embodiments only express several embodiments of the present invention. Although the description is relatively specific and detailed, it should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be based on the appended claims.

Claims

1. A noise reduction component for heat pump water heating equipment, characterized in that: The invention comprises a sleeve (1) and a first mesh tube (2), a second mesh tube (3) and a sound-absorbing column (4) arranged in the sleeve (1); one end of the sleeve (1) is provided with a first air outlet (101), and the other end is provided with an end cover (5); the end cover (5) comprises an annular cover body (501) and a second air outlet (502) arranged on the outer ring of the annular cover body (501) and a third air outlet (503) arranged on the inner ring of the annular cover body (501); there is a distance between the outer wall of the first mesh tube (2) and the inner wall of the sleeve (1) to form a first annular cavity (6); the first mesh tube (2) is away from the annular cavity (6) and the inner wall of the sleeve (1) is provided with a first air outlet (101); the first mesh tube (2) is away from the annular cavity (6) and the inner wall of the sleeve (1) is provided with a second air outlet (502) arranged on the outer ring of the annular cover body (501); the first mesh tube (2) is away from the annular cavity (6) and the inner wall of the sleeve (1) is provided with a first air outlet (1 ... A mesh plate (7) is provided at one end of the shaped cover body (501); the first mesh tube (2) is located inside the second mesh tube (3); and there is a gap between the outer wall of the first mesh tube (2) and the inner wall of the second mesh tube (3), thereby forming a second annular cavity; the sound-absorbing column (4) is inserted into the second annular cavity and one end thereof abuts against the mesh plate (7); the first air port (101) is communicated with the first annular cavity (6) and the second air port (502); and the axial through hole (301) of the second mesh tube (3) is communicated with the first air port (101) and the third air port (503).

2. The noise reduction assembly according to claim 1, characterized in that: The mesh plate (7) is provided with a central through hole, and the second mesh cylinder (3) is arranged around the central through hole at one end facing the mesh plate (7) and abuts against the peripheral side of the mesh plate (7).

3. The noise reduction assembly according to claim 1, wherein: A plurality of connecting ears (201) are provided at intervals on the outer side wall of the first net cylinder (2) close to one end of the annular cover (501), and the annular cover (501) is connected to the connecting ears (201) via a first fastener.

4. The noise reduction assembly according to any one of claims 1 to 3, characterized in that: The inner wall of the annular cover (501) extends toward the inner wall of the second mesh tube (3) to form a sinking platform (504), and the sinking platform (504) and the first mesh tube (2) jointly clamp the second mesh tube (3) and the sound-absorbing column (4).

5. The noise reduction assembly according to claim 4, characterized in that: A grille (505) is further provided at the third air outlet (503), and the peripheral side of the grille (505) is connected to the sinking platform (504).

6. The noise reduction assembly according to any one of claims 1 to 3, characterized in that: The end cover (5) further comprises a plurality of reinforcing ribs (506) arranged at intervals along the outer wall of the annular cover body (501) and extending radially. The plurality of reinforcing ribs (506) are arranged at the second air outlet (502) and divide the second air outlet (502) into a plurality of sub-air outlets (5021).

7. The noise reduction assembly according to claim 6, characterized in that: The end cover (5) further comprises a flange (507) arranged around the outer side of the second air outlet (502), the flange (507) being provided with a plurality of first mounting holes (508) at intervals, the sleeve (1) being provided with second mounting holes (102) corresponding one-to-one to the first mounting holes (508), and the sleeve (1) being connected to the flange (507) by passing through the first mounting holes (508) and the second mounting holes (102) via a second fastener.

8. The noise reduction assembly according to claim 7, characterized in that: The flanges (507) are respectively connected to the plurality of reinforcing ribs (506), and the plurality of first mounting holes (508) are provided on at least some of the reinforcing ribs (506).

9. The noise reduction assembly according to any one of claims 1 to 3, characterized in that: The sound-absorbing column (4) is sound-absorbing cotton, and the sound-absorbing cotton is made of at least one of melamine cotton, bicomponent cotton and glass fiber cotton.

10. A heat pump water heating device, characterized in that: include: The housing (8) is provided with an air inlet (801) and an air outlet (802); At least one noise reduction component according to any one of claims 1 to 9, at least one of the noise reduction components is arranged outside the shell (8) and is arranged corresponding to the air inlet (801) and / or the air outlet (802), and the first air outlet (101) of the sleeve (1) is connected to the air inlet (801) or the air outlet (802).

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