Double-layer silencing cover structure and compressor

Abstract

The utility model relates to the technical field of compressors, and discloses a double-layer noise reduction cover structure and a compressor, the double-layer noise reduction cover structure comprises an inner-layer noise reduction cover and an outer-layer noise reduction cover, the inner-layer noise reduction cover comprises a first base plate, a first through hole is formed in the middle of the first base plate, a first cover body is upwards formed on the end face of the first base plate, and a second through hole is formed in the middle of the first cover body. A plurality of first through grooves are formed downwards in the upper end of the first cover body, the outer-layer noise reduction cover comprises a second base plate, a second cover body is formed upwards on the end face of the second base plate, a second through hole corresponding to the first through hole is formed in the middle of the second cover body, the outer-layer noise reduction cover covers the inner-layer noise reduction cover, and the outer-layer noise reduction cover covers the inner-layer noise reduction cover. The first cover body is positioned in the second cover body; the compressor has the advantages that a noise transmission path is changed, noise is refracted and counteracted in the silencing cavity, the noise transmission rate is reduced, and therefore the noise amount of the compressor is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of compressors, and in particular relates to a double-layer silencer cover structure and a compressor. Background Art

[0002] With the acceleration of urbanization and the increase of industrial activities, the problem of noise pollution is becoming increasingly serious, which not only affects people's rest and sleep, but also poses a potential threat to physical and mental health. Therefore, the research and development and application of noise improvement technology has important practical significance.

[0003] Nowadays, as the greenhouse effect has a more and more serious impact on the earth, the earth's ambient temperature is getting higher and higher, so almost every household will install air conditioners to relieve the boredom caused by hot air. As people's living standards continue to improve, the requirements for air conditioners are gradually increasing in terms of experience. In particular, the requirements for air conditioner noise are getting higher and higher.

[0004] The noise sources of the air conditioner can be roughly divided into the fan noise in the hanging machine and the compressor noise. The fan noise can generally be optimized by reducing the fan speed and adjusting the fan size, while the countermeasures for improving the compressor noise are relatively limited. For example, in the prior art, the purpose of reducing noise is achieved by setting a single-layer silencer cover or simply stacking a double-layer silencer cover structure, but the actual noise reduction effect is not improved. When the compressor is running, there is still a large amount of noise, which causes ear discomfort. Utility Model Content

[0005] In order to solve the deficiencies of the prior art, the utility model provides a double-layer silencer cover structure and a compressor, which achieves the purpose of changing the noise transmission path, refracting and canceling the noise in the silencer cavity, reducing the noise transmission rate, and thus reducing the noise level of the compressor.

[0006] The technical purpose to be achieved by the utility model is achieved through the following technical solutions:

[0007] The utility model provides a double-layer sound-absorbing cover structure, comprising an inner sound-absorbing cover and an outer sound-absorbing cover;

[0008] The inner layer sound-absorbing cover comprises a first base plate, a first through hole is opened in the middle of the first base plate, a first cover body is formed upward on the end surface of the first base plate, and a plurality of first through grooves are formed downward on the upper end of the first cover body;

[0009] The outer layer sound-absorbing cover comprises a second substrate, a second cover body is formed upwardly on the end surface of the second substrate, and a second through hole corresponding to the first through hole is opened in the middle of the second cover body;

[0010] The outer layer silencer cover is arranged on the inner layer silencer cover so that the first cover body is located inside the second cover body.

[0011] In some implementations, a plurality of the first through grooves are sequentially distributed along the circumferential direction of the first through hole, and play a role in uniformly guiding the airflow, so as to better change the transmission path of the airflow.

[0012] In some implementations, the first cover body includes a plurality of first convex bulges, the plurality of first convex bulges are connected to each other, and at least one first through groove is formed on each of the first convex bulges. The structural design of the plurality of first convex bulges can play a better refraction offsetting role during airflow transmission to reduce the noise transmission rate.

[0013] In some implementations, the number of the first convex hulls is four, the four first convex hulls are symmetrically distributed in pairs, and the shapes of two adjacent first convex hulls are different. Designing the first convex hulls in different shapes can make the airflow refracted in different directions offset, thereby achieving the desired effect of reducing noise.

[0014] In some implementations, a first positioning hole is formed on the first substrate, and a second positioning hole is formed on the second substrate to match the first positioning hole. The first positioning hole and the second positioning hole are provided to facilitate assembly of the inner and outer silencer covers, thereby improving assembly efficiency and assembly accuracy.

[0015] In some implementations, a first exhaust hole is opened on the side wall of the second cover body, and a lateral exhaust method is adopted to effectively reduce the eddy current noise of the compressor and further reduce the noise level of the compressor.

[0016] In some implementations, a first air guide wall is provided at the periphery of the first exhaust hole, and the first air guide wall is used to guide the airflow discharged from the first exhaust hole to be discharged laterally from the second cover body, thereby optimizing the exhaust method and achieving a better noise reduction effect.

[0017] In some implementations, the side wall of the second cover body is further provided with a second exhaust hole, and the first exhaust hole and the second exhaust hole are in a relative relationship;

[0018] A second air guide wall is provided on the periphery of the second exhaust hole, and the second air guide wall is used to guide the airflow discharged from the second exhaust hole to be discharged along the side of the second cover body, and the guiding direction of the second air guide wall is opposite to the guiding direction of the first air guide wall, so as to prevent the discharge of gas between the first exhaust hole and the second exhaust hole from interfering with each other and ensure the noise reduction effect.

[0019] The utility model also provides a compressor, comprising a support and the double-layered muffler cover structure described in any one of the above items, wherein the double-layered muffler cover structure is arranged on the support;

[0020] The support includes a seat body and a sleeve extending upward from the middle of the seat body. The sleeve passes through the first through hole and the second through hole in sequence. The double-layer silencer cover structure is arranged on the support to achieve the purpose of reducing the slapping sound of the pump valve plate.

[0021] In some implementations, a third positioning hole is provided on the base body for matching with the first positioning hole, so as to facilitate assembly of the support and the double-layer silencer cover structure and improve assembly efficiency and assembly accuracy.

[0022] In summary, the utility model has at least the following benefits:

[0023] 1. The double-layer silencer cover structure and the compressor provided by the utility model are designed to add a first through groove on the inner silencer cover to change the noise transmission path, so that the noise is refracted and offset in the silencer cavities of the inner silencer cover and the outer silencer cover, so as to achieve the purpose of reducing the noise transmission rate, thereby reducing the noise volume of the compressor and improving the ear feeling problem.

[0024] 2. The double-layer silencer cover structure and compressor provided by the utility model can effectively reduce the eddy current noise of the compressor and further reduce the noise level of the compressor by optimizing the exhaust method of the outer silencer cover so that the exhaust airflow is discharged along the side of the second cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the double-layer sound-absorbing cover structure of Example 1 of the utility model;

[0026] Figure 2 It is an exploded view of the double-layer muffler cover structure of Example 1 of the utility model;

[0027] Figure 3 An exploded view of the double-layer muffler cover structure of Example 2 of the utility model;

[0028] Figure 4 and Figure 5 It is a schematic diagram of the outer layer sound-absorbing cover of Embodiment 3 of the present utility model;

[0029] Figure 6 It is a schematic diagram of a compressor according to Embodiment 4 of the present utility model;

[0030] Figure 7 It is a schematic diagram of a support according to Embodiment 4 of the present utility model;

[0031] 100, inner layer sound-absorbing cover; 110, first substrate; 111, first positioning hole; 120, first through hole; 130, first cover body; 131, first convex bump; 140, first through groove;

[0032] 200, outer layer soundproof cover; 210, second substrate; 211, second positioning hole; 220, second cover body; 221, first exhaust hole; 222, first air guide wall; 223, second exhaust hole; 224, second air guide wall; 230, second through hole;

[0033] 300, support; 310, seat body; 311, third positioning hole; 320, shaft sleeve. DETAILED DESCRIPTION

[0034] In order to make the purpose, technical solution and advantages of the implementation of the utility model clearer, the technical solution in the implementation of the utility model will be clearly and completely described below in conjunction with the drawings in the implementation of the utility model. The described implementation is a part of the implementation of the utility model, not all of the implementations.

[0035] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0036] Embodiment 1:

[0037] See also Figure 1 and Figure 2 A double-layer silencer cover structure is applied to a compressor, and includes an inner silencer cover 100 and an outer silencer cover 200.

[0038] The inner layer muffler cover 100 includes a first substrate 110, a first through hole 120 is opened in the middle of the first substrate 110, and the first through hole 120 can be used for the insertion and positioning of the shaft sleeve on the support during the assembly process. The first substrate 110 can be an annular structure, and its inner periphery defines the first through hole 120. A first cover body 130 is formed upward on the end surface of the first substrate 110, which is equivalent to forming the first cover body 130 upward between the inner periphery and the outer periphery of the first substrate 110. The inner periphery and the outer periphery of the first substrate 110 define a first muffler cavity inside the first cover body 130. The first muffler cavity is used to reduce or eliminate the airflow noise generated by the volume change inside the compressor. A plurality of first through grooves 140 are formed downward at the upper end of the first cover body 130. The design of the first through grooves 140 can change the transmission path of the noise in the first muffler cavity, so that the noise is refracted and offset in the first muffler cavity, thereby reducing the transmission rate of the noise.

[0039] The outer silencer cover 200 includes a second substrate 210, and a second cover body 220 is formed upward on the end surface of the second substrate 210. The edge portion of the second substrate 210 defines a second silencer cavity inside the second cover body 220. The second silencer cavity is used to reduce or eliminate the airflow noise generated by the change of cavity volume inside the compressor. A second through hole 230 corresponding to the first through hole 120 is opened in the middle of the second cover body 220. Similarly, the second through hole 230 is used for the penetration and limitation of the shaft sleeve on the support during the assembly process.

[0040] It should be noted that the first cover body 130 is formed between the inner periphery and the outer periphery of the first substrate 110, and a plurality of first through grooves 140 are formed downwardly at the upper end of the first cover body 130, while the second cover body 220 is directly formed upwardly from the end surface of the second substrate 210. In this way, the structures of the inner soundproof cover 100 and the outer soundproof cover 200 are not the same.

[0041] The outer soundproof cover 200 is arranged on the inner soundproof cover 100, so that the first cover body 130 is located in the second cover body 220, and the second substrate 210 is covered on the first substrate 110, forming a double-layer soundproof cover structure. Since the first cover body 130 is located in the second cover body 220, it is equivalent to the airflow being refracted and offset by the first soundproofing chamber before entering the second soundproofing chamber. At this time, the first through groove 140 can not only change the transmission path of the noise in the first soundproofing chamber, but also change the transmission path of the noise in the second soundproofing chamber, so that the noise is refracted and offset in the first soundproofing chamber and the second soundproofing chamber, thereby reducing the noise transmission rate, thereby reducing the noise volume of the compressor and improving the ear feeling problem.

[0042] Embodiment 2:

[0043] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the double-layer sound-absorbing cover structure of the utility model, see Figure 3 .

[0044] The plurality of first through grooves 140 are sequentially distributed along the circumferential direction of the first through hole 120 , and play a role in uniformly guiding the airflow, so as to better change the transmission path of the airflow.

[0045] It can be seen from Example 1 that the first substrate 110 is an annular structure, and its inner circumference defines a first through hole 120, that is, the first through hole 120 is a circular through hole, and a plurality of first through grooves 140 are distributed in sequence along the circumferential direction of the first through hole 120. It can be seen that the through grooves are grooves that penetrate from front to back, that is, the plurality of first through grooves 140 are not connected to each other, but there is a certain distance between them, and the plurality of first through grooves 140 are distributed in sequence along the circumferential direction of the first through hole 120, which can be understood as that the distance between each first through groove 140 and the center of the first through hole 120 is equal, and the distribution of this kind of transfer path can play a better guiding role in the airflow.

[0046] It should be noted that the present embodiment does not impose any specific limitation on the number of the first through slots 140 , and the number may be four through slots, five through slots, or six through slots, which may be adjusted according to actual needs.

[0047] In some embodiments, the first cover body 130 includes a plurality of first convex bumps 131, and the plurality of first convex bumps 131 are interconnected. At least one first through groove 140 is formed on each first convex bump 131. The structural design of the plurality of first convex bumps 131 can play a better refraction offsetting role during airflow transmission to reduce the noise transmission rate.

[0048] Specifically, there are four first convex humps 131, which are symmetrically distributed in pairs, and the shapes of two adjacent first convex humps 131 are different. Designing the first convex humps 131 in different shapes can offset the refraction of the airflow in different directions, thereby achieving the desired effect of reducing noise.

[0049] That is, there are two forms in the four first convex bumps 131, the volume of the first convex bump 131 in one form is larger than the volume of the first convex bump 131 in another form, and each first convex bump 131 is formed with a first through groove 140 along the circumferential direction of the first through hole 120 for changing the airflow transmission path.

[0050] In some embodiments, a first positioning hole 111 is opened on the first substrate 110, and a second positioning hole 211 is opened on the second substrate 210 for matching with the first positioning hole 111. The first positioning hole 111 and the second positioning hole 211 are provided to facilitate the assembly of the inner silencer 100 and the outer silencer 200, thereby improving the assembly efficiency and assembly accuracy.

[0051] For example, four first through holes 120 are opened on the first substrate 110 near the outer periphery, and the four first through holes 120 are evenly spaced; four second through holes 230 are opened on the second substrate 210 near the edge, and the four second through holes 230 are evenly spaced. When the inner sound-absorbing cover 100 and the outer sound-absorbing cover 200 are assembled, the outer sound-absorbing cover 200 is placed outside the inner sound-absorbing cover 100, and each first through hole 120 corresponds to a second through hole 230. Finally, locking members such as bolts can be used to pass through the second through holes 230 and the first through holes 120 in sequence to lock the outer sound-absorbing cover 200 with the inner sound-absorbing cover 100.

[0052] It should be noted that the present embodiment does not specifically limit the number and position distribution of the first through holes 120 and the second through holes 230, and can be adjusted according to actual needs. It is only necessary to satisfy that the first through holes 120 correspond to the second through holes 230, so as to facilitate the alignment, assembly and locking connection of the inner silencer cover 100 and the outer silencer cover 200.

[0053] Embodiment 3:

[0054] The difference between this embodiment and embodiment 1 is that this embodiment further optimizes the double-layer sound-absorbing cover structure of the utility model, see Figure 4 and Figure 5 .

[0055] A first exhaust hole 221 is formed on the side wall of the second cover body 220, and the lateral exhaust method is adopted to effectively reduce the eddy current noise of the compressor and further reduce the noise level of the compressor.

[0056] The exhaust holes on the traditional silencer cover are used for upward exhaust. The direct exhaust method will impact the motor or casing and generate secondary noise. The side exhaust method is adopted here. Compared with the upward exhaust method, it can not only better avoid the problem of secondary noise, but also effectively reduce the eddy current noise of the compressor.

[0057] In some embodiments, a first air guide wall 222 is provided around the periphery of the first exhaust hole 221, and the first air guide wall 222 is used to guide the airflow discharged from the first exhaust hole 221 to be discharged laterally along the second cover body 220, thereby optimizing the exhaust mode and achieving a better noise reduction effect.

[0058] For example, the first exhaust hole 221 is semicircular, including a straight line segment and an arc segment, wherein the straight line segment is perpendicular to the second substrate 210, the first air guide wall 222 is disposed at the peripheral portion where the arc segment is located, and the first air guide wall 222 is designed as an arched structure, so that when the airflow is discharged through the first exhaust hole 221, it is restricted by the shape of the first exhaust hole 221 and guided by the first air guide wall 222, and can be discharged laterally along the second cover body 220. Of course, in this embodiment, there is no specific restriction on the shape of the first exhaust hole 221 and the first air guide wall 222, and they can be adjusted according to actual needs to achieve the effect of achieving the side discharge of the airflow along the second cover body 220 when the airflow is discharged through the first exhaust hole 221.

[0059] Similarly, a second exhaust hole 223 is also provided on the side wall of the second cover body 220, and the first exhaust hole 221 and the second exhaust hole 223 are in a relative relationship, that is, the first exhaust hole 221 and the second exhaust hole 223 are respectively located on the side walls on opposite sides of the second cover body 220, and a second air guide wall 224 is provided on the periphery of the second exhaust hole 223, and the second air guide wall 224 is used for guiding the airflow discharged from the second exhaust hole 223 to be discharged along the side direction of the second cover body 220. Here, the morphological design of the second exhaust hole 223 and the second air guide wall 224 can be understood with reference to the first exhaust hole 221 and the first air guide wall 222.

[0060] For example, the second exhaust hole 223 is semicircular, including a straight segment and an arc segment, wherein the straight segment is perpendicular to the second substrate 210, the second air guide wall 224 is disposed at the peripheral portion of the arc segment, and the second air guide wall 224 is designed as an arched structure.

[0061] The guiding direction of the second air guiding wall 224 is opposite to the guiding direction of the first air guiding wall 222 , that is, mutual interference between the discharge of gas between the first exhaust hole 221 and the second exhaust hole 223 is prevented, thereby ensuring the noise reduction effect.

[0062] Embodiment 4:

[0063] This embodiment provides a compressor based on the above embodiment. Figure 6 and Figure 7 .

[0064] A compressor comprises a support 300 and the double-layered sound-absorbing cover structure in any one of the above-mentioned embodiments, wherein the double-layered sound-absorbing cover structure is disposed on the support 300 .

[0065] The support 300 includes a seat body 310 and a shaft sleeve 320 extending upward from the middle of the seat body 310. The shaft sleeve 320 passes through the first through hole 120 and the second through hole 230 in sequence. The double-layer silencer cover structure is arranged on the support 300 to achieve the purpose of reducing the slapping sound of the pump valve plate.

[0066] It can be known that in a conventional compressor structure, a mounting groove for mounting a valve plate and a protective plate is provided on the seat body 310 of the support 300, and an exhaust port is provided at the bottom of the mounting groove. The valve plate is used to buffer the airflow discharged from the exhaust port, while the protective plate plays a certain protective role on the valve plate. The double-layer silencer cover structure is provided on the support 300. Specifically, the cover is provided on the seat body 310, so that when the valve plate and the protective plate are impacted by the airflow, the double-layer silencer cover can reduce the noise generated. At the same time, when the airflow enters the first silencer cavity and the second silencer cavity, it will be affected by the first through groove 140, thereby changing the airflow, that is, the transmission path of the noise, so that the noise is refracted and offset in the silencer cavities of the inner silencer cover 100 and the outer silencer cover 200, so as to achieve the purpose of reducing the noise transmission rate.

[0067] In some embodiments, a third positioning hole 311 is provided on the seat body 310 for matching with the first positioning hole 111. It is understandable that the first positioning hole 111, the second positioning hole 211 and the third positioning hole 311 are in a matching relationship with each other, which facilitates the assembly of the support 300 with the double-layer silencer cover structure and improves assembly efficiency and assembly accuracy.

[0068] During specific assembly, bolts may be passed through the second positioning hole 211, the first positioning hole 111 and the third positioning hole 311 in sequence to lock the outer silencer cover 200, the inner silencer cover 100 and the support 300, thereby improving the accuracy of alignment and the stability of assembly.

[0069] The double-layer silencer cover structure and compressor provided by the utility model increase the design of a first through groove on the inner silencer cover to change the noise transmission path, so that the noise is refracted and offset in the silencer cavities of the inner silencer cover and the outer silencer cover, so as to achieve the purpose of reducing the noise transmission rate, thereby reducing the noise level of the compressor and improving the ear feeling problem; by optimizing the exhaust method of the outer silencer cover so that the exhausted airflow is discharged along the side of the second cover body, the eddy current noise of the compressor can be effectively reduced, and the noise level of the compressor can be further reduced.

[0070] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0071] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the accompanying drawings, or the orientation or position relationship in which the utility model product is usually placed when in use, which is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0072] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0073] In the present utility model, unless otherwise clearly specified and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, the first feature being above, above, and above the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being below, below, and below the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0074] Although the utility model is described in conjunction with the above specific embodiments, it is obvious that those skilled in the art can make many substitutions, modifications and changes based on the above content. Therefore, all such substitutions, improvements and changes are included in the spirit and scope of the appended claims.

Claims

1. A double-layer silencer cover structure, characterized in that: It comprises an inner layer sound-absorbing cover (100) and an outer layer sound-absorbing cover (200); The inner layer sound-absorbing cover (100) comprises a first base plate (110), a first through hole (120) is opened in the middle of the first base plate (110), a first cover body (130) is formed upward on the end surface of the first base plate (110), and a plurality of first through grooves (140) are formed downward on the upper end of the first cover body (130); The outer layer sound-absorbing cover (200) comprises a second substrate (210), a second cover body (220) is formed on the end surface of the second substrate (210) facing upward, and a second through hole (230) corresponding to the first through hole (120) is opened in the middle of the second cover body (220); The outer layer sound-absorbing cover (200) is disposed on the inner layer sound-absorbing cover (100), so that the first cover body (130) is located inside the second cover body (220).

2. The double-layer sound-absorbing cover structure according to claim 1 is characterized in that: A plurality of the first through grooves (140) are distributed in sequence along the circumferential direction of the first through hole (120).

3. The double-layer soundproof cover structure according to claim 1, characterized in that: The first cover body (130) comprises a plurality of first convex bulges (131), the plurality of first convex bulges (131) are connected, and at least one first through groove (140) is formed on each of the first convex bulges (131).

4. The double-layer sound-absorbing cover structure according to claim 3 is characterized in that: The number of the first convex hulls (131) is four, the four first convex hulls (131) are symmetrically distributed in pairs, and the shapes of two adjacent first convex hulls (131) are different.

5. The double-layer sound-absorbing cover structure according to claim 1 is characterized in that: The first substrate (110) is provided with a first positioning hole (111), and the second substrate (210) is provided with a second positioning hole (211) for matching with the first positioning hole (111).

6. The double-layer sound-absorbing cover structure according to claim 1, characterized in that: The side wall of the second cover body (220) is provided with a first exhaust hole (221).

7. The double-layer sound-absorbing cover structure according to claim 6, characterized in that: A first air guide wall (222) is provided at the periphery of the first exhaust hole (221), and the first air guide wall (222) is used to guide the airflow exhausted from the first exhaust hole (221) to be discharged along the side of the second cover body (220).

8. The double-layer sound-absorbing cover structure according to claim 7, characterized in that: The side wall of the second cover body (220) is further provided with a second exhaust hole (223), and the first exhaust hole (221) and the second exhaust hole (223) are in a relative relationship; A second air guide wall (224) is provided at the periphery of the second exhaust hole (223), and the second air guide wall (224) is used to guide the airflow discharged from the second exhaust hole (223) to be discharged laterally from the second cover body (220), and the guiding direction of the second air guide wall (224) is opposite to the guiding direction of the first air guide wall (222).

9. A compressor, characterized in that: It comprises a support (300) and the double-layered sound-absorbing cover structure according to any one of claims 1 to 8, wherein the double-layered sound-absorbing cover structure is arranged on the support (300); The support (300) comprises a seat body (310) and a shaft sleeve (320) extending upward from the middle of the seat body (310), and the shaft sleeve (320) passes through the first through hole (120) and the second through hole (230) in sequence.

10. The compressor according to claim 9, characterized in that The seat body (310) is provided with a third positioning hole (311) for matching with the first positioning hole (111).

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