Compressor noise reduction structure and heat pump system

Abstract

The utility model relates to a compressor noise reduction structure and a heat pump system. The utility model relates to a noise reduction structure of a compressor. The noise reduction structure comprises a unit chassis and the compressor, the first noise reduction structure is arranged outside the compressor in a surrounding manner; the second noise reduction structure is fixedly arranged on the unit chassis; the second noise reduction structure comprises a bottom plate and a plurality of supporting pieces used for supporting the compressor. The supporting pieces are connected with one another, a second noise reduction cavity is defined by the supporting pieces and the bottom plate, the bottom plate covers a bottom opening of the second noise reduction cavity in a sealed mode, and the first noise reduction structure covers the top of the second noise reduction cavity in a sealed mode. According to the noise reduction structure of the compressor, the second noise reduction structure is arranged between the unit chassis and the compressor, meanwhile, the first noise reduction structure wrapping the compressor body is arranged above the second noise reduction structure, and sound waves reflected by the second noise reduction structure are further consumed and absorbed through the first noise reduction structure; and the noise reduction effect is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat pump technical field especially is related to a compressor noise reduction structure and heat pump system. BACKGROUND

[0002] Heat pump technology is widely used in many fields due to its high efficiency and energy saving characteristics. However, with the popularization of variable frequency heat pump products, the noise problem is increasingly prominent, especially the low-pitched noise produced by the compressor in the low frequency band and the sharp noise in the high frequency band, which has a significant impact on user comfort.

[0003] For the noise problem of heat pump, although various noise reduction measures have been taken in the industry, common noise reduction methods include: selecting low-noise components, applying damping technology, installing silencers, and setting sound insulation facilities. Selecting low-noise components can effectively solve the noise problem from the source, but the effect is limited for high-frequency operation application scenarios, and the cost is high; damping technology can effectively reduce the noise caused by vibration, but it is difficult to produce effect on the sound of the compressor body; installing a silencer can effectively eliminate noise at specific locations, but it cannot be applied to the sound reduction of the entire heat pump.

[0004] The most common noise reduction method is to set up sound insulation facilities, such as using sound insulation covers and sound absorbing cotton. Although this noise reduction scheme has a low cost, due to the characteristics of long wavelength, slow attenuation, and strong penetration of low-frequency noise, it is difficult for traditional sound insulation materials and sound absorption technology to achieve ideal noise reduction effect; high-frequency noise is easily reflected in a closed or semi-closed space, leading to noise superposition and enhancement, further increasing the difficulty of noise reduction. Therefore, how to reasonably and effectively reduce the noise of the compressor is a problem to be solved. INVENTION CONTENTS

[0005] Therefore, the purpose of the utility model is to provide a compressor noise reduction structure, by setting a second noise reduction structure between the unit chassis and the compressor, a hard and heavy sheet metal bottom plate is arranged at the bottom of the second noise reduction cavity for reflecting sound waves to avoid sound waves diffracting out of the unit chassis; at the same time, a first noise reduction structure is arranged above the second noise reduction structure and wrapped around the outside of the compressor body, the sound waves reflected by the second noise reduction structure are further consumed and absorbed by the first noise reduction structure, improving the noise reduction effect.

[0006] Another purpose of the utility model is to provide a heat pump system with a compressor noise reduction structure that can effectively reduce the noise generated during the operation of the compressor.

[0007] A compressor noise reduction structure comprises:

[0008] a unit chassis and a compressor;

[0009] The first noise reduction structure is arranged outside the compressor;

[0010] The second noise reduction structure is fixed on the chassis of the air conditioning unit. The second noise reduction structure comprises a bottom plate and a plurality of support members for supporting the compressor. The support members are connected to each other and cooperatively form a second noise reduction cavity with the bottom plate. The bottom plate is sealed and covers the bottom opening of the second noise reduction cavity. The first noise reduction structure is sealed and covers the top of the second noise reduction cavity.

[0011] Further, the first noise reduction structure comprises a first noise reduction layer arranged close to the outer surface of the compressor and a second noise reduction layer arranged outside the first noise reduction layer.

[0012] Further, the first noise reduction layer comprises a first side silencer arranged around the side wall of the compressor, a first upper silencer arranged on the top of the compressor, and a first lower silencer arranged on the bottom of the compressor. The first upper silencer and the first lower silencer are respectively connected to the upper and lower ends of the first side silencer.

[0013] Further, the second noise reduction layer comprises a second side silencer arranged around the side wall of the compressor, a second upper silencer arranged on the top of the compressor, and a second lower silencer arranged on the bottom of the compressor. The second upper silencer and the second lower silencer are respectively connected to the upper and lower ends of the second side silencer.

[0014] Further, the bottom of the compressor is provided with a plurality of spaced foot pads. The foot pads are fixed to the support members. The first lower silencer and the second lower silencer are arranged between the compressor and the support members.

[0015] Further, the first lower silencer comprises a first lower silencer body completely covering the bottom opening of the first side silencer, and a plurality of first connecting portions extending from the edges of the first lower silencer body. The first connecting portions are arranged between adjacent foot pads and are used to fold and connect to the first side silencer.

[0016] The second lower silencer comprises a second lower silencer body completely covering the bottom opening of the second side silencer, and a plurality of second connecting portions extending from the edges of the second lower silencer body. The second connecting portions are arranged between adjacent foot pads and are used to fold and connect to the second side silencer.

[0017] Further, the first noise reduction layer and the second noise reduction layer each comprise a plurality of fiber layers and rubber layers arranged in multiple layers and overlapping each other.

[0018] The thickness of the fiber layer is 5-10 mm, and the thickness of the rubber layer is 2-5 mm.

[0019] Further, the fiber layer density of the first noise reduction layer is greater than the fiber layer density of the second noise reduction layer.

[0020] Further, the compressor side wall is further provided with a junction box, and the first noise reduction structure further comprises a junction box sound insulation piece wrapped outside the junction box.

[0021] A heat pump system comprises the compressor noise reduction structure.

[0022] The compressor noise reduction structure has the advantages that:

[0023] (1) The second noise reduction structure is arranged between the unit base plate and the compressor, a hard and heavy sheet metal bottom plate is arranged at the bottom of the second noise reduction cavity, and sound waves are reflected to avoid sound waves diffracting out of the unit base plate;

[0024] (2) The first noise reduction structure wrapped outside the compressor body is arranged above the second noise reduction structure, most of the sound waves are reflected back when the sound waves are transmitted to the surface of the bottom plate, and the first noise reduction structure at the top of the second noise reduction cavity further consumes and absorbs the sound waves;

[0025] (3) The first noise reduction structure is arranged as a double-layer noise reduction layer, and the double-layer noise reduction layer adopts fiber layers with different densities, so that a wider frequency band of noise can be effectively absorbed, and the noise reduction effect is improved;

[0026] (4) The noise reduction layer is arranged by overlapping a plurality of fiber layers and rubber layers, so that the absorption and loss of noise can be effectively improved;

[0027] (5) The first lower sound insulation piece and the second lower sound insulation piece are clamped between the compressor and the support, so that the vibration noise between the compressor and the support can be reduced; and the first lower sound insulation piece and the second lower sound insulation piece are turned to wrap the bottom of the compressor, so that the first noise reduction cavity is closed, and noise leakage is avoided.

[0028] In order to better understand and implement, the utility model is described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The second noise reduction structure provided for the embodiment of the application is shown in the structural schematic diagram;

[0030] Figure 2 The explosion view of the compressor noise reduction structure provided for the embodiment of the application is shown in the explosion view;

[0031] Figure 3 The partial enlarged view of the compressor noise reduction structure is shown in the partial enlarged view; Figure 2

[0032] Figure 4 The structure schematic diagram of the sound insulation piece provided for the embodiment of the application is shown in the structure schematic diagram.​

[0033] In the figure: 10-compressor; 11-foot pad; 12-abutment; 13-junction box; 20-first noise reduction structure; 21-first noise reduction layer; 211-first upper sound-absorbing piece; 2111-first fiber layer; 2112-first rubber layer; 2113-second fiber layer; 2114-second rubber layer; 212-first side sound-absorbing piece; 213-first lower sound-absorbing piece; 2131-first connecting part; 22-second noise reduction layer; 221-second upper sound-absorbing piece; 222-second side sound-absorbing piece; 223-second lower sound-absorbing piece; 2231-second connecting part; 23-junction box sound-absorbing piece; 30-second noise reduction structure; 31-supporting piece; 32-bottom plate; 40-unit chassis. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0035] In the description of the utility model, it needs to be explained that the directions or position relations indicated by the terms "vertical direction", "upper", "lower", "horizontal" and the like are the directions or position relations shown based on the drawings, and are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the indicated devices or elements must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the utility model. In addition, "first", "second", "third" and "fourth" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the utility model, it also needs to be explained that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection" and "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be connected through an intermediate medium, it can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0037] With the popularization of variable frequency heat pump products, the noise problem is increasingly prominent, especially the low-pitched noise generated by the compressor at the low frequency band and the sharp noise at the high frequency band, which significantly affects the user's comfort.

[0038] For the noise problem of heat pump, although various noise reduction measures have been taken in the industry, common noise reduction methods include: selecting low-noise components, applying damping technology, installing a muffler, and setting sound insulation facilities. Selecting low-noise components can effectively solve the noise problem from the source, but the effect is limited for high-frequency operation application scenarios, and the cost is high; damping technology can effectively reduce the noise caused by vibration, but it has little effect on the sound of the compressor body; installing a muffler can effectively eliminate noise at specific locations, but it cannot be applied to the sound reduction of the entire heat pump.

[0039] The most common noise reduction method is to set sound insulation facilities, such as sound insulation covers and sound-absorbing cotton. Although this noise reduction scheme has a low cost, due to the characteristics of long wavelength, slow attenuation, and strong penetration of low-frequency noise, it is difficult for traditional sound insulation materials and sound-absorbing technology to achieve ideal noise reduction effects. High-frequency noise is easily reflected in closed or semi-closed spaces, leading to noise superposition and enhancement, further increasing the difficulty of noise reduction.

[0040] Based on this, the embodiments of the present application provide a compressor noise reduction structure, which simultaneously reduces high-frequency noise and low-frequency noise, achieving effective noise reduction of the compressor.

[0041] Please refer to Figure 1 and Figure 2 , the embodiments of the present application provide a compressor noise reduction structure, which includes a unit chassis 40, a compressor 10, and a first noise reduction structure 20 and a second noise reduction structure 30. The first noise reduction structure 20 is located outside the compressor 10 and forms a first noise reduction cavity for reducing the noise generated by the compressor 10. The second noise reduction structure 30 is fixed to the unit chassis 40. The second noise reduction structure 30 includes a bottom plate 32 and a plurality of support members 31 for supporting the compressor 10. The plurality of support members 31 are connected to each other and form a second noise reduction cavity with the bottom plate 32. The bottom plate 32 seals and covers the bottom opening of the second noise reduction cavity, and the first noise reduction structure 20 seals and covers the top of the second noise reduction cavity. The second noise reduction cavity is used to reflect the noise at the bottom of the compressor. Part of the reflected noise is absorbed by the structure at the bottom of the compressor, and the remaining noise that is not absorbed enters the first noise reduction cavity for further noise reduction.

[0042] It can be understood that the unit chassis 40 is used to accommodate the compressor 10 and other devices, and the bottom thereof is usually not sealed due to the need for preventing water storage. The low-frequency noise of the compressor 10 is mainly concentrated on the bottom of the compressor 10, and since the wavelength of the low-frequency noise is very long, it has strong diffraction ability, so that the low-frequency noise generated by the compressor 10 is easily transmitted to the outside through the unit chassis 40. In the embodiment of the present application, the second noise reduction structure 30 is arranged at the bottom of the compressor 10, and a hard and heavy sheet metal bottom plate 32 is arranged at the bottom of the second noise reduction cavity for reflecting sound waves to avoid sound waves from diffracting out of the unit chassis 40. When the sound waves are transmitted to the surface of the bottom plate 32, most of the sound waves are reflected back, and the first noise reduction structure 20 arranged at the top of the second noise reduction cavity further consumes and absorbs them. At the same time, the hard and heavy sheet metal bottom plate 32 can reduce low-frequency vibration by using its high inertia. In addition, due to the mutual restriction between the supporting members 31, the sheet metal bottom plate 32 is strengthened, and the vibration and amplification effect of the sound waves acting on the bottom plate 32 are effectively reduced, thereby reducing the focusing or resonance phenomenon of the sound waves.

[0043] Further, the height of the second noise reduction cavity is set to 60-100 mm. In this height range, the rebound effect of the bottom plate 32 on the sound waves is good, and the compressor 10 can be stably supported, and the cost can also be controlled.

[0044] Further, in some embodiments, the first noise reduction structure 20 includes a first noise reduction layer 21 arranged close to the outer surface of the compressor 10, and a second noise reduction layer 22 arranged on the outer side of the first noise reduction layer 21. The first noise reduction layer 21 and the second noise reduction layer 22 each include a plurality of layers of overlapping fiber layers and rubber layers. The fiber layer mainly utilizes the large number of fine through pores inside the fiber and communicated with the outside, so that the fiber has certain viscosity and internal friction, which can convert sound energy into heat energy to achieve sound reduction. When the sound wave enters the material, it will cause the vibration of the fiber. Due to the friction between the fibers and the friction between the fibers and the air molecules, the sound wave rubs with the solid network formed by the pores, thereby converting part of the sound energy into heat energy and dissipating. The rubber layer scatters and absorbs sound waves through its inherent elastic deformation, porous structure, and at the same time, the vibration of the high molecular chain inside the material converts the sound wave energy into heat energy, effectively absorbing and reducing the noise generated by the compressor 10. At the same time, the soft rubber material with appropriate elasticity and damping characteristics can absorb and dissipate low-frequency vibration energy. In the embodiment, the rubber layer is made of PVC material, which has good damping performance. When the sound wave propagates to the surface of the PVC material, part of the sound energy will be reflected on the surface of the material, and the other part of the sound energy will make the molecules inside the PVC material vibrate, which can realize sound reflection and absorption at the same time, and has better sound insulation and sound absorption performance; and the density of the PVC material is relatively low, which is convenient for processing and installation, and the cost is also relatively low.

[0045] Please refer toFigure 2 and Figure 4 Further, the thickness of the fiber layer is 5-10 mm, and the thickness of the rubber layer is 2-5 mm. In this thickness range, the noise reduction effect is easier to achieve in the production process, and the noise reduction effect can be avoided due to the material being too thin, or the wrapping difficulty due to the material being too thick. As a preferred embodiment, in the present embodiment, the first noise reduction structure 20 and the second noise reduction structure 30 are both formed by overlapping two layers of fiber layers and two layers of rubber layers, i.e., the first fiber layer 2111, the first rubber layer 2112, the second fiber layer 2113, and the second rubber layer 2114 are sequentially arranged, wherein the first fiber layer 2111 is arranged close to the outer surface of the compressor 10. This arrangement has a better noise reduction effect on the broadband noise generated by the compressor 10.

[0046] Further, in the present embodiment, the density of the fiber layer of the first noise reduction layer 21 is greater than the density of the fiber layer of the second noise reduction layer 22, so that the noise generated by the operation of the compressor 10 first enters the first noise reduction layer 21 close to the outer wall, and most of the noise is absorbed by the first noise reduction layer 21, and the other part of the noise passes through the first noise reduction layer 21 and enters the gap space between the first noise reduction layer 21 and the second noise reduction layer 22, and after being refracted and reflected in the gap space, part of the noise enters the second noise reduction layer 22 for further noise reduction. In this process, the sound waves are reflected and interfered, and the reflected waves and the incident waves interfere with each other, thereby canceling or weakening the low-frequency noise of a specific frequency.

[0047] Further, the distance between the first noise reduction layer 21 and the second noise reduction layer 22 is 5-10 mm, which can effectively prolong the propagation path of the noise, and is conducive to further noise reduction. In the gap space between the first noise reduction layer 21 and the second noise reduction layer 22, the reflected waves and the incident waves interfere with each other, which can significantly weaken the sound energy.

[0048] Specifically, the first noise reduction layer 21 includes a first side noise reduction member 212 surrounding the side wall of the compressor 10, a first upper noise reduction member 211 arranged on the top of the compressor 10, and a first lower noise reduction member 213 arranged on the bottom of the compressor 10; the first upper noise reduction member 211 and the first lower noise reduction member 213 are respectively fixed to the upper and lower ends of the first side noise reduction member 212. The second noise reduction layer 22 includes a second side noise reduction member 222 surrounding the side wall of the compressor 10, a second upper noise reduction member 221 arranged on the top of the compressor 10, and a second lower noise reduction member 223 arranged on the bottom of the compressor 10; the second upper noise reduction member 221 and the second lower noise reduction member 223 are respectively fixed to the upper and lower ends of the second side noise reduction member 222.

[0049] In the embodiment, a certain space is kept between the first upper silencer 211 and the second upper silencer 221, and between the first side silencer 212 and the second side silencer 222, while the first lower silencer 213 and the second lower silencer 223 are stacked and attached at the bottom of the compressor 10. Specifically, a plurality of spaced apart foot pads 11 are provided at the bottom of the compressor 10, the foot pads 11 are fixed to the support 31, the first lower silencer 213 and the second lower silencer 223 are arranged between the compressor 10 and the support 31, and can effectively absorb the noise rebounded by the second noise reduction structure 30.

[0050] Please refer to Figure 2 and Figure 3 Further, in some embodiments, an abutting portion 12 is arranged between two adjacent foot pads 11, for clamping the first lower silencer 213 and the second lower silencer 223 between the compressor 10 and the support 31, to fill the gap between the compressor 10 and the second noise reduction structure 30, and improve the noise reduction effect.

[0051] Further, in some embodiments, the first lower silencer 213 includes a first lower silencer body completely covering the bottom opening of the first side silencer 212, and a plurality of first connecting portions 2131 extending and connected to the edges of the first lower silencer body, the first connecting portions 2131 are arranged between two adjacent foot pads 11, and are used to be folded and connected to the first side silencer 212. The second lower silencer 223 includes a second lower silencer body completely covering the bottom opening of the second side silencer 222, and a plurality of second connecting portions 2231 extending and connected to the edges of the second lower silencer body; the second connecting portions 2231 are arranged between two adjacent foot pads 11, and are used to be folded and connected to the second side silencer 222. In the installation process, the first lower silencer 213 and the second lower silencer 223 are arranged at the bottom of the compressor 10, clamped between the compressor 10 and the support 31 by the abutting portion 12, the exposed first connecting portions 2131 are folded and covered on the abutting portion 12, and are fixed to the lower end of the first side silencer 212; similarly, the exposed second connecting portions 2231 are folded and covered outside the first connecting portions 2131, and are fixed to the lower end of the second side silencer 222, to realize the closure of the first noise reduction cavity, so as to reduce the vibration noise between the compressor 10 and the support 31, and avoid the noise leakage. Specifically, the first connecting portions 2131 and the second connecting portions 2231 are respectively bonded to the first side silencer 212 and the second side silencer 222 by magic tape, which is easy to implement and convenient to assemble.

[0052] Further, in some embodiments, the compressor 10 side wall is provided with a junction box 13 which penetrates the first noise reduction layer 21 and the second noise reduction layer 22 and is exposed outside the first noise reduction cavity. The first noise reduction structure 20 is further provided with a junction box sound insulation piece 23 which is wrapped outside the junction box 13, completely covers the exposed junction box 13 and is sealingly bonded to the outer wall of the second noise reduction layer 22 to prevent noise from escaping.

[0053] The embodiments of the present application also provide a heat pump system which realizes effective noise reduction of the compressor in a limited space by arranging the compressor noise reduction structure.

[0054] Compared with the prior art, the beneficial effects of the embodiments of the present application are as follows:

[0055] (1) By arranging the second noise reduction structure between the unit base plate and the compressor, a hard and heavy sheet metal bottom plate is arranged at the bottom of the second noise reduction cavity for reflecting sound waves to prevent sound waves from being diffracted out of the unit base plate;

[0056] (2) By arranging the first noise reduction structure wrapped outside the compressor body above the second noise reduction structure, when sound waves are transmitted to the surface of the bottom plate, most of the sound waves will be reflected back, and the first noise reduction structure at the top of the second noise reduction cavity will further consume and absorb the sound waves;

[0057] (3) By arranging the first noise reduction structure as a double-layer noise reduction layer and the double-layer noise reduction layer using fiber layers with different densities, a wider frequency band of noise can be effectively absorbed, and the noise reduction effect is improved;

[0058] (4) The noise reduction layer is arranged by overlapping multiple fiber layers and rubber layers, which can effectively improve the absorption and loss of noise;

[0059] (5) By clamping the first lower sound insulation piece and the second lower sound insulation piece between the compressor and the support, the vibration noise between the compressor and the support can be reduced; and the first lower sound insulation piece and the second lower sound insulation piece are wrapped around the bottom of the compressor to realize the closure of the first noise reduction cavity and prevent noise from escaping.

[0060] The above-described embodiments only express several embodiments of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the scope of the utility model patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, a number of modifications and improvements can be made, and the present application also intends to include these changes and modifications.

Claims

1. A compressor noise reduction structure, characterized by, Comprise: A unit base (40) and a compressor (10); A first noise reduction structure (20) surrounding the compressor (10) outside; A second noise reduction structure (30) fixed on the unit base (40); the second noise reduction structure (30) comprises a bottom plate (32) and a plurality of support pieces (31) for supporting the compressor (10); a plurality of support pieces (31) are connected with each other and the bottom plate (32) to form a second noise reduction cavity together, the bottom plate (32) is sealed and covers the bottom opening of the second noise reduction cavity, and the first noise reduction structure (20) is sealed and covers the top of the second noise reduction cavity.

2. The compressor noise reduction structure according to claim 1, wherein: The first noise reduction structure (20) comprises a first noise reduction layer (21) arranged close to the outer surface of the compressor (10), and a second noise reduction layer (22) arranged on the outer side of the first noise reduction layer (21).

3. The compressor noise reduction structure according to claim 2, wherein: The first noise reduction layer (21) comprises a first side silencer (212) surrounding the side wall of the compressor (10), a first upper silencer (211) arranged on the top of the compressor (10), and a first lower silencer (213) arranged on the bottom of the compressor (10); the first upper silencer (211) and the first lower silencer (213) are respectively connected to the upper and lower ends of the first side silencer (212).

4. The compressor noise reduction structure according to claim 3, wherein: The second noise reduction layer (22) comprises a second side silencer (222) surrounding the side wall of the compressor (10), a second upper silencer (221) arranged on the top of the compressor (10), and a second lower silencer (223) arranged on the bottom of the compressor (10); the second upper silencer (221) and the second lower silencer (223) are respectively connected to the upper and lower ends of the second side silencer (222).

5. The compressor noise reduction structure according to claim 4, wherein: The bottom of the compressor (10) is provided with a plurality of foot pads (11) arranged at intervals, the foot pads (11) are fixedly connected to the support pieces (31), and the first lower silencer (213) and the second lower silencer (223) are arranged between the compressor (10) and the support pieces (31).

6. The compressor noise reduction structure according to claim 5, wherein: The first lower silencer (213) comprises a first lower silencer body completely covering the bottom opening of the first side silencer (212), and a plurality of first connecting portions (2131) extending and connected to the edges of the first lower silencer body, the first connecting portions (2131) are arranged between adjacent two foot pads (11) and used for folding and connecting to the first side silencer (212). The second lower sound attenuation member (223) comprises a second lower sound attenuation body covering the bottom opening of the second side sound attenuation member (222) completely, and a plurality of second connecting parts (2231) extending from the edges of the second lower sound attenuation body; the second connecting parts (2231) are arranged between two adjacent foot pads (11) and are used for being connected to the second side sound attenuation member (222) by folding.

7. The noise reduction structure of the compressor according to claim 2, characterized in that: The first noise reduction layer (21) and the second noise reduction layer (22) each comprise a plurality of fiber layers and rubber layers arranged in an interlaced manner. The thickness of the fiber layer is 5-10 mm, and the thickness of the rubber layer is 2-5 mm.

8. The noise reduction structure of the compressor according to claim 7, characterized in that: The density of the fiber layer of the first noise reduction layer (21) is greater than the density of the fiber layer of the second noise reduction layer (22).

9. The noise reduction structure of the compressor according to claim 2, characterized in that: The side wall of the compressor (10) is further provided with a junction box (13), and the first noise reduction structure (20) further comprises a junction box sound attenuation member (23) covering the outside of the junction box (13).

10. A heat pump system, characterized by, The noise reduction structure of the compressor according to any one of claims 1-9. ​

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