CN117128169A

CN117128169A - compressor

Info

Publication number: CN117128169A
Application number: CN202311122704.1A
Authority: CN
Inventors: 请求不公布姓名; 戈大伟
Original assignee: Hangzhou Lvneng New Energy Auto Parts Co ltd
Current assignee: Hangzhou Lvneng New Energy Auto Parts Co ltd
Priority date: 2023-08-31
Filing date: 2023-08-31
Publication date: 2023-11-28

Abstract

The application provides a compressor, comprising a fixed scroll and a silencing assembly, wherein the silencing assembly comprises a first cover part and a second cover part, the silencing assembly is provided with a resonant cavity, and the resonant cavity is positioned between the first cover part and the second cover part; at least one of the first cover part and the second cover part is connected with the fixed scroll, the silencing assembly is further provided with a first exhaust cavity, the first exhaust cavity is located between the first cover part and the fixed scroll, the fixed scroll is provided with an exhaust hole, the exhaust hole can be communicated with the first exhaust cavity, the first cover part is provided with a first through hole, the first through hole is used for communication between the first exhaust cavity and the resonant cavity, the second cover part is provided with a second through hole, and the second through hole is communicated with the resonant cavity. In the application, at least one of the first cover part and the second cover part is connected with the fixed scroll, so that the silencing assembly is fixed on the fixed scroll, the integral structure is simplified, and the assembly is more convenient.

Description

Compressor

Technical Field

The present application relates to compressors, and more particularly, to a muffler structure of a compressor.

Background

The compressor comprises a fixed scroll and an movable scroll, when the movable scroll moves in a translational way, a closed gas chamber formed by the movable scroll and the fixed scroll simultaneously rotates and the volume is reduced, gas is compressed, and when the gas is compressed to a certain pressure, the gas is discharged through small holes on the fixed scroll, so that the circulation and the refrigeration effect of the refrigeration system are realized.

In the compressor, when compressed gas rushes out of small holes on the base plate of the fixed scroll, pressure pulsation is generated, noise is formed, and the using effect is affected. In the related art, a silencer is arranged in a compressor, and the energy of sound waves is weakened by the silencer, so that pneumatic noise is reduced. However, the silencer is fixed on the partition board in the inner cavity of the compressor shell, the partition board is required to be assembled at the exhaust port of the fixed vortex disk, and then the silencer is assembled and fixed, so that the whole structure is complex and inconvenient to assemble.

Disclosure of Invention

The application aims to provide a compressor, which aims to simplify the whole structure and reduce the assembly difficulty.

In order to achieve the above object, the present application provides a compressor including a fixed scroll and a muffler assembly including a first cover member and a second cover member, the muffler assembly having a resonance chamber between the first cover member and the second cover member;

at least one of the first cover part and the second cover part is connected with the fixed scroll, the first cover part is located between the second cover part and the fixed scroll, the silencing assembly is further provided with a first exhaust cavity, the first exhaust cavity is located between the first cover part and the fixed scroll, the fixed scroll is provided with an exhaust hole, the exhaust hole can be communicated with the first exhaust cavity, the first cover part is provided with a first through hole, the first through hole is used for communication between the first exhaust cavity and the resonant cavity, the second cover part is provided with a second through hole, and the second through hole is communicated with the resonant cavity.

The application provides a compressor, the silencing assembly comprises a first cover part and a second cover part, and sound vibration is damped through a resonant cavity between the first cover part and the second cover part, so that noise is reduced; at least one of the first cover part and the second cover part is connected with the fixed scroll, and the silencing assembly is fixed on the fixed scroll, so that the integral structure is simplified, and the assembly is more convenient.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it will be apparent that the drawings in the following description are only some embodiments of the present application, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.

FIG. 1 is a front view of a compressor discharge cover, a fixed scroll, and a muffler assembly provided by the present application;

FIG. 2 is a cross-sectional view taken along the direction A-A of FIG. 1;

FIG. 3 is an exploded view of FIG. 1;

FIG. 4 is a perspective view of a non-orbiting scroll and a muffler assembly of a compressor provided by the present application;

FIG. 5 is a top view of FIG. 4;

FIG. 6 is a B-B sectional view of FIG. 5;

FIG. 7 is a perspective view of a non-orbiting scroll of a compressor provided by the present application;

fig. 8 is a perspective view of a muffler assembly of a compressor provided by the present application;

fig. 9 is a perspective view of a first cover member of a compressor provided by the present application;

fig. 10 is a perspective view of a second cover member of a compressor provided by the present application;

FIG. 11 is a perspective view of a compressor provided by the present application;

fig. 12 is a sectional view of a compressor provided by the present application.

Detailed Description

For a better understanding of the technical solution of the present application, the following detailed description of the embodiments of the present application refers to the accompanying drawings.

It should be understood that the described embodiments are merely some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the related art, the silencer is fixed on the partition board in the inner cavity of the compressor shell, the partition board is required to be assembled at the exhaust port of the fixed vortex disk, and then the silencer is assembled and fixed, so that the whole structure is complex and inconvenient to assemble. In order to simplify the whole structure and reduce the assembly difficulty, the application provides a compressor, referring to fig. 4 to 10, comprising a fixed scroll 1 and a silencing assembly 2, wherein the silencing assembly 2 comprises a first cover part 21 and a second cover part 22, the silencing assembly 2 is provided with a resonant cavity 20, and the resonant cavity 20 is positioned between the first cover part 21 and the second cover part 22; at least one of the first cover member 21 and the second cover member 22 is connected to the fixed scroll 1, the first cover member 21 is located between the second cover member 22 and the fixed scroll 1, the muffler assembly 2 further has a first exhaust chamber 200, the first exhaust chamber 200 is located between the first cover member 21 and the fixed scroll 1, the fixed scroll 1 has an exhaust hole 11, the exhaust hole 11 is communicable with the first exhaust chamber 200, the first cover member 21 has a first through hole 210, the first through hole 210 is used for communication of the first exhaust chamber 200 and the resonance chamber 20, the second cover member 22 has a second through hole 220, and the second through hole 220 is communicable with the resonance chamber 20. At least one of the first cover part and the second cover part is connected with the fixed scroll, and the silencing assembly is directly fixed on the fixed scroll, so that the integral structure is simplified, and the assembly is more convenient.

In order to reduce the processing difficulty of the silencing assembly, the first cover part 21 and the second cover part 22 can be respectively connected with the fixed scroll 1, so that the integral structure of the silencing assembly 2 is simplified, the first cover part 21 and the second cover part 22 are convenient to process, and the processing difficulty is reduced. In some embodiments, the muffler assembly 2 is a two-layer structure having two cover members and one resonant cavity 20, as shown in fig. 2 and 6. Of course, in other embodiments, the muffler assembly 2 may have a structure with more than three layers, with more than three layers of cover members and more than two resonant cavities 20, however, more layers of muffler assembly 2 may increase the volume, affect the overall efficiency of the compressor, and increase damping, resulting in untimely pressure drop of the exhaust gas. The first cover member 21 and the second cover member 22 may be coupled to the fixed scroll 1 in various ways, and the coupling manner is not limited. In some embodiments, the first cover member 21, the second cover member 22 and the fixed scroll 1 may be assembled in a split manner, and the machining precision and the assembly precision of the split may meet the design requirements. Specifically, referring again to fig. 4, the compressor further includes a connection member 14, and the first cover member 21 and/or the second cover member 22 are connected to the fixed scroll 1 through at least one connection member 14, wherein only one connection member 14 is illustrated in fig. 4, and the other plurality of connection members 14 are not illustrated in fig. 4. In some specific embodiments, the connector 14 employs bolts; of course, in other embodiments, the first cover member 21 and the second cover member 22 may be formed as a single piece with the fixed scroll 1. The method of obtaining the integrated piece is not particularly limited, and the integrated piece can be obtained by one or a combination of a plurality of modes of welding, casting, powder metallurgy, metal powder injection molding and the like, can be obtained by processing after welding, casting molding, powder metallurgy molding, metal powder injection molding and the like, and can also be obtained by directly machining. In a specific embodiment, the two parts are processed through machining, so that the same positioning machining can be performed on a machine tool, the positioning accuracy of the two parts is guaranteed, and the error is reduced.

Referring again to fig. 4 and 8, in other embodiments, the first cover member 21 includes a first securing portion 213 and/or the second cover member 22 includes a second securing portion 223, and the first securing portion 213 and/or the second securing portion 223 are coupled to the fixed scroll 1 by the coupling member 14. In a specific embodiment, the connection member 14 may be bolts, the connection of the first cover member 21 to the fixed scroll 1 may be achieved by a plurality of bolts, and the connection of the second cover member 22 to the fixed scroll 1 may be achieved by a plurality of bolts. The first cover member 21 and the second cover member 22 may be connected to the fixed scroll 1 by different bolts, or may be connected to the fixed scroll 1 by the same set of bolts.

To further improve the convenience of assembly, in some embodiments, the first cover member 21 and the second cover member 22 are simultaneously fixed to the fixed scroll 1 by using the connection member 14, thereby facilitating the assembly. Specifically, referring again to fig. 4, 5 and 8, in the present embodiment, the connecting member 14 connects the first cover member 21, the second cover member 22 and the fixed scroll 1 at the same time. Wherein each first fixing portion 213 of the first cover member 21 is disposed corresponding to each second fixing portion 223 of the second cover member 22, the corresponding first fixing portion 213 and second fixing portion 223 are distributed along the axial direction of the fixed scroll 1, and the corresponding first fixing portion 213 and second fixing portion 223 are connected to the fixed scroll 1 through the connecting member 14. Of course, in other embodiments, part of the first fixing portions 213 may be arranged corresponding to the second fixing portions 223, i.e. at least one first fixing portion 213 may be arranged corresponding to the second fixing portion 223. The first fixing portion 213 and the second fixing portion 223 that are correspondingly arranged may use at least one connecting piece 14 to connect both with the fixed scroll 1 at the same time, and the first fixing portion 213 and the second fixing portion 223 that are not correspondingly arranged may use the connecting piece 14 to connect with the fixed scroll 1 respectively. In a specific embodiment, as shown in fig. 4, the first fixing portion 213 and the second fixing portion 223 each have a mounting hole, and the correspondingly arranged mounting holes of the first fixing portion 213 and the second fixing portion 223 are correspondingly arranged to be connected with the fixed scroll 1 in cooperation with the connection member 14.

Referring again to fig. 4, 5, and 8-10, in some embodiments, the first fixing portion 213 and the second fixing portion 223 are disposed side by side, i.e. distributed along the axial direction of the fixed scroll 1. Specifically, the second cover member 22 further includes second through grooves 225, each second through groove 225 is disposed corresponding to each second fixing portion 223, the correspondingly disposed second through grooves 225 and second fixing portions 223 are distributed along the axial direction of the fixed scroll 1, and the first fixing portions 213 penetrate the second through grooves 225. In this embodiment, the first fixing portion 213 extends through the second through slot 225, and the same group of corresponding first fixing portion 213 and second fixing portion 223 can be connected with the fixed scroll 1 by using the connecting member 14 at the same time, so as to facilitate assembly. In other embodiments, a portion of the second through groove 225 may be disposed corresponding to a portion of the second fixing portion 223; the second through grooves 225 and the second fixing portions 223 may be arranged in parallel, and in this case, the first fixing portions 213 and the second fixing portions 223 may be arranged in parallel, and the first fixing portions 213 and the second fixing portions 223 may need to be connected to the fixed scroll 1 by the connection members 14.

Referring again to fig. 6-10, in some embodiments, the first cover member 21 includes a first cover portion 211, the second cover member 22 includes a second cover portion 221, and the first cover portion 211 and the second cover portion 221 are distributed along the axial direction of the fixed scroll 1; the first end cap 211 has a first through hole 210. In the present embodiment, the number of the first through holes 210 is more than 2, and the first through holes 210 are uniformly distributed; the resonant cavity 20 includes a first chamber 20a, a first end cover 211 has a first end surface 211a facing the first chamber 20a, a second end cover 221 has a second end surface 221a facing the first chamber 20a, the first end surface 211a is parallel to the second end surface 221a, and a distance between the first end surface 211a and the second end surface 221a is a thickness of an air layer in the first chamber 20a along an axial direction of the fixed scroll 1, and the thickness is denoted as M. Of course, in other embodiments, the first end surface 211a and the second end surface 221a may also have spherical structures, and preferably the centers of the two are coincident, where the thickness of the air layer in the first chamber 20a along the radial direction of the first end surface 211a is denoted as M. In a specific embodiment, m=l, L satisfies formula (a)

Wherein f ₀ The natural frequency of the exhaust cover 3 is Hz, and n is a positive number; c is the sound velocity in m/s; the sound velocity c is a calculated value, and sound velocity of noise under the working condition is obtained by calculating the temperature of the refrigerant and the working condition through physical software of REFPROP refrigerant; p is the penetration rate of the silencer 2100; t is the average thickness of the silencer 2100 in m; d is the average pore diameter of the first via 210 in m. Here, the silencer 2100 includes a first end cap 211 and a first side stopper 212, and in this embodiment, n×f ₀ As the target noise frequency, the noise can be attenuated more accurately for the natural frequency of the exhaust cover 3, and particularly when n=1, the noise reduction effect is better. Of course, in other embodiments, the target noise frequency may be other frequencies where noise needs to be attenuated.

In some embodiments, the first cover member 21 and the second cover member 22 are of a cover structure. Specifically, referring to fig. 8 to 10, the side of the first end cover 211 facing the fixed scroll 1 has a first side blocking portion 212, and in some embodiments, the first side blocking portion 212 extends along the axial direction of the fixed scroll 1, however, an inclined arrangement may be adopted. The second end cap 221 has a second side stop 222 on a side facing the fixed scroll 1, and in some embodiments, the second side stop 222 extends along the axial direction of the fixed scroll 1, although an inclined arrangement may be used. The resonant cavity 20 further includes a second chamber 20b, the second chamber 20b being located between the first side stop 212 and the second side stop 222; in a specific embodiment, the first fixing portion 213 is connected to the first side blocking portion 212, the second fixing portion 223 is connected to the second side blocking portion 222, and the first fixing portion 213 and the second fixing portion 223 are perpendicular to the axial direction of the fixed scroll 1, so that the assembly is convenient. Wherein the average thickness of the air layer in the second chamber 20b along the direction perpendicular to the axis of the fixed scroll 1 is N, in a specific embodiment, n=l, L satisfies the above formula (a), in this embodiment, n×f ₀ As the target noise frequency, the noise may be attenuated more accurately with respect to the natural frequency of the exhaust cover 3, and of course, in other embodiments, the target noise frequency may be other frequencies where attenuation of noise is required. In some embodiments, the first side stop 212 is contoured to be the same as the second side stop 222 such that the interlayer therebetween (the air layer in the second chamber 20 b) has a uniform thickness, i.e., the air layer in the second chamber 20b is uniformly formed throughout the thickness, and the air layer in the second chamber 20b is the same as the air layer in the first chamber 20 a.

In some embodiments, the first side stop 212 has a first through hole 210. By adding the first through hole 210 to the first side stopper 212, the silencing area can be increased. In this embodiment, the number of the first through holes 210 may be 1 or more than 2; the second side baffle portion 222 has a second through hole 220, and in a specific embodiment, the first through hole 210 of the first side baffle portion 212 and the second through hole 220 of the second side baffle portion 222 are staggered, so that the sound wave does not directly exit through the second through hole 220 of the second side baffle portion 222 after passing through the first through hole 210 of the first side baffle portion 212, but forms a sufficient reflection rebound area to achieve a better noise elimination effect. In this embodiment, the number of the second through holes 220 may be 1 or 2 or more.

In a specific embodiment, the distribution positions of the first through holes 210 are not specifically limited, and in some embodiments, the first through holes 210 are all distributed in the first end cover portion 211, or the first through holes 210 are all distributed in the first side blocking portion 212; in other embodiments, a portion of the first through holes 210 may be disposed at the first end cap 211, and another portion of the first through holes 210 may be disposed at the first side stop 212. In order to reduce the volume of the compressor and reduce the height of the muffler assembly 2, referring to fig. 8, the first end cover 211 and the first side baffle 212 are provided with the first through holes 210, and the first end cover 211 has more holes, and the first side baffle 212 has fewer holes, i.e. the number of the first through holes 210 of the first end cover 211 is greater than the number of the first through holes 210 of the first side baffle 212. At this time, the height requirement for the first side stopper 212 is lower, and the small-volume requirement of the compressor, particularly the high small-volume requirement for the in-vehicle motor-driven compressor, can be satisfied.

The first end cap 211 has a higher requirement for the average thickness M of the air in the first chamber 20a corresponding to the main resonance surface with a larger number of first through holes 210, preferably satisfies the above formula (a), and m=l is preferably satisfied to obtain the value for f ₀ More accurate noise reduction effect. In this embodiment, n×f ₀ As the target noise frequency, the noise may be attenuated more accurately with respect to the natural frequency of the exhaust cover 3, and of course, in other embodiments, the target noise frequency may be other frequencies where attenuation of noise is required. When the average thickness N of the air in the second chamber 20b also satisfies the formula (a), i.e., n=l, the improvement for f can be better achieved ₀ Is a sound-deadening effect of the engine. Particularly, when the air in the second chamber 20b is of uniform thickness, the noise elimination effect on the target noise frequency can be better improved; and will be n f ₀ As the target noise frequency, the noise can be attenuated more accurately with respect to the natural frequency of the exhaust cover 3, although in other embodiments, the target noise frequency can be other desiredThe frequency of the noise is to be attenuated. When the average thickness N of the second chamber 20b does not satisfy the thickness L, the noise cancellation effect on the target noise frequency is reduced, but the entire noise cancellation frequency band range can be enlarged.

Referring to fig. 9 and 10 again, in some embodiments, the first through hole 210 and the second through hole 220 are circular holes, and the aperture of the second through hole 220 is not smaller than that of the first through hole 210, so as to reduce the pressure drop caused by untimely exhaust due to excessive damping. In addition, since the friction force is generated when the gas is discharged through the first through hole 210 and the second through hole 220, when the first through hole 210 and the second through hole 220 are non-circular holes such as square holes, stress concentration is caused, so that the noise attenuation assembly 2 is easy to break, and the durability is reduced; in this embodiment, the first through holes 210 and the second through holes 220 are round holes, so that stress is dispersed more evenly, and durability is improved.

In some embodiments, the first through holes 210 maintain the same aperture to obtain a more accurate noise attenuation effect for the target noise frequency, and the aperture can also approximately achieve noise attenuation in the case of inconsistent aperture due to machining errors, but the noise attenuation effect for the target noise frequency is reduced, so that the overall noise attenuation frequency range is enlarged.

Referring again to fig. 6-9, in some embodiments, the compressor further includes a discharge valve 12 and a discharge valve stopper 13, the discharge valve 12 and the discharge valve stopper 13 are at least partially located in the first discharge chamber 200, the discharge valve 12 and the discharge valve stopper 13 are connected to the fixed scroll 1, the discharge valve 12 is located between the fixed scroll 1 and the discharge valve stopper 13, and the discharge valve 12 is used for communication or blocking between the discharge hole 11 and the first discharge chamber 200; the exhaust valve 12 is used for controlling the opening and closing of the exhaust hole 11, when the compression pressure of the refrigerant reaches a certain value, the exhaust valve 12 is pressed open, and the compressed refrigerant is discharged from the exhaust hole 11; wherein the exhaust valve stopper 13 is used to restrict the opening degree of the exhaust valve 12.

Referring again to fig. 4, 8 and 9, in some embodiments, the muffler assembly 2 further includes a first limiting portion 214, the exhaust valve 12 and the exhaust valve limiting member 13 are located between the first limiting portion 214 and the fixed scroll 1, and the compressor further includes a connecting member 14, wherein the first limiting portion 214 is connected to the exhaust valve 12, the exhaust valve limiting member 13 and the fixed scroll 1 through the connecting member 14. In the embodiment, one or more connectors 14 may be used to fix the first limiting portion 214, the exhaust valve 12, and the exhaust valve limiting member 13 at the same time, so as to facilitate assembly. Referring to fig. 8 to 10 again, in some embodiments, the first limiting portion 214 is connected to the first cover member 21, the second cover member 22 has a first through slot 224, and the first limiting portion 214 penetrates through the first through slot 224; of course, the first limiting portion 214 may be connected to the second cover member 22; the first stopper 214 extends in a direction perpendicular to the axis of the fixed scroll 1.

Referring to fig. 1 to 3, in some embodiments, the compressor further includes a discharge cover 3, a second discharge chamber 300 is provided between the discharge cover 3 and the fixed scroll 1, the muffler assembly 2 is located in the second discharge chamber 300, the discharge cover 3 has a discharge port 31, the discharge port 31 communicates with the second discharge chamber 300, and the second through hole 220 is used for communication between the resonance chamber 20 and the second discharge chamber 300. When the pressure of the refrigerant compressed reaches a certain value, the discharge valve 12 is opened, the compressed refrigerant is discharged from the discharge hole 11, enters the second discharge chamber 300 after noise is reduced by the first cover member 21 and the second cover member 22, and is discharged from the discharge cover 3 through the discharge port 31. In addition, in other embodiments, the second cover member 22 may be the exhaust cover 3, where the exhaust cover 3 is regarded as the second cover member 22, the exhaust port 31 is regarded as the second through hole 220, the refrigerant discharged through the exhaust hole 11 enters the second exhaust chamber 300 after noise is attenuated through the first cover member 21, and then the exhaust cover 3 is discharged through the exhaust port 31.

Referring to fig. 11 and 12, in some embodiments, the compressor further includes a housing 4, an orbiting scroll 5, a motor 6, and a driving mechanism 7, wherein, in some embodiments, the exhaust cover 3 is connected with the housing 4, the fixed scroll 1 and the orbiting scroll 5 are disposed in an inner cavity between the housing 4 and the exhaust cover 3, a gas compression cavity 8 is disposed between the fixed scroll 1 and the orbiting scroll 5, the gas compression cavity 8 is communicated with an exhaust hole 11, the orbiting scroll 5 is connected with the driving mechanism 7, the driving mechanism 7 is in transmission connection with the motor 6, and the motor 6 drives the orbiting scroll 5 to rotate through the driving mechanism 7. When the movable scroll 5 rotates, the gas compression chamber 8 formed by the movable scroll 5 and the fixed scroll 1 simultaneously rotates and becomes smaller in volume, gas is compressed, and when the gas is compressed to a certain pressure, the gas is discharged through the exhaust hole 11 on the fixed scroll 1, noise is weakened through the first cover part 21 and the second cover part 22 in sequence, and finally the gas is discharged from the exhaust cover 3.

In order to reduce the difficulty in adjusting noise of the target noise frequency, referring to fig. 1 to 10, the application further provides a compressor, which comprises a fixed scroll 1, a silencing component 2 and a discharge cover 3, wherein a second discharge cavity 300 is arranged between the fixed scroll 1 and the discharge cover 3, the silencing component 2 is positioned in the second discharge cavity 300, the silencing component 2 comprises a first cover part 21 and a second cover part 22, and the first cover part 21 is positioned between the second cover part 22 and the fixed scroll 1; the first cover member 21 includes a muffler 2100, the muffler assembly 2 has a resonance chamber 20, the resonance chamber 20 is located between the muffler 2100 and the second cover member 22, the muffler 2100 has a first through hole 210, the fixed scroll 1 has an exhaust hole 11, the first through hole 210 is used for communicating the exhaust hole 11 and the resonance chamber 20, the second cover member 22 has a second through hole 220, and the second through hole 220 is used for communicating the resonance chamber 20 and the second exhaust chamber 300;

the sound deadening portion 2100 has a first surface 2100a on a side facing the resonance chamber 20, and the second cover member 22 has a second surface 221a on a side facing the resonance chamber 20, and an average distance between the first surface 2100a and the second surface 221a is L, and the unit of L is m, and satisfies the following formula (a):

wherein f ₀ The natural frequency of the exhaust cover 3 is Hz, and n is a positive number; c is the sound velocity in m/s; the sound velocity c is a calculated value, and sound velocity of noise under the working condition is obtained by calculating the temperature of the refrigerant and the working condition through physical software of REFPROP refrigerant; p is the penetration rate of the silencer 2100; t is the average thickness of the silencer 2100 in m; d is the average pore diameter of the first via 210 in m.

In the application, n is f ₀ Defined as the target noise frequency, obtainedThe software and input parameters adopted for taking the natural frequency of the exhaust cover 3 comprise the following contents:

the simulation software is ANSYS, and the adopted simulation method is a finite element method;

the input parameters include:

physical model (STP format);

material parameters: material name, modulus of elasticity (MPa), poisson's ratio, density (Kg/m) ³ )；

Boundary conditions: working conditions and fixing modes.

Since the compressor will produce maximum noise at the discharge cap 3 when operating, n f will be the same in the present application ₀ The target noise frequency is defined, and the target noise frequency is used as a resonant frequency design L (namely, the average thickness of an air layer in the resonant cavity 20), so that more accurate noise reduction can be performed aiming at the maximum noise at the exhaust cover 3, and the noise reduction and elimination effect is improved.

In some embodiments, in formula (a), n=2 ⁱ Or (b)Wherein i is a natural number. When n is 1, the noise reducing effect on the natural frequency of the exhaust cover 3 is better. In a specific embodiment, when the machining is difficult to satisfy f according to 1 times ₀ When L is calculated as the target noise frequency, the value of the target noise frequency can be adjusted. For example: when the natural frequency of the exhaust cap 3 reaches 8552hz, c=148.05 m/s, p=0.067, t=0.001 m, d=0.001 m, L is calculated to be 0.0028m. At this time, since the average distance L between the first surface 2100a and the second surface 221a is too small, it is difficult to secure the machining accuracy, and f may be 2 times ₀ As the target noise frequency, f is 2 times ₀ =8552 Hz, i.e. f ₀ The average distance can be better ensured when processing, when L is calculated to be 0.0114m, which is=4276 Hz.

Referring again to fig. 9, in some embodiments, the rate of perforation of silencer 2100 is equal to the perforated area of silencer 2100 divided by the effective area of silencer 2100; the sum of the projected areas of the first through holes 210 along the axial direction thereof is the perforated area of the silencer 2100 (i.e., the sum of the areas of the cross sections of the first through holes 210), and the effective area of the silencer 2100 is the surface area of the silencer 2100 on the side facing away from the resonant cavity 20, i.e., the inner surface area of the silencer 2100 facing the first exhaust chamber 200; in some embodiments, the perforated area of the silencer 2100 is larger than or equal to the projection area of the exhaust hole 11 along the axial direction (i.e. the cross-sectional area of the exhaust hole 11), otherwise, exhaust is not timely, exhaust pulsation is generated, and pressure drop and additional noise problems are caused. In a specific embodiment, the perforated area of the silencer 2100 is equal to twice the projected area of the exhaust hole 11 in the axial direction thereof, and 6.7% may be used.

Referring again to fig. 6 to 10, in some embodiments, the silencer 2100 includes a first end cap 211, the second cover member 22 includes a second end cap 221, the first and second end cap 211 and 221 are distributed along the axial direction of the fixed scroll 1, and the first end cap 211 has a first through hole 210; the resonant cavity 20 includes a first chamber 20a, the first chamber 20a being located between the first end cap portion 211 and the second end cap portion 221; the first end cap portion 211 has a first end surface 211a on a side facing the first chamber 20a, the second end cap portion 221 has a second end surface 221a on a side facing the first chamber 20a, and an average distance=l between the first end surface 211a and the second end surface 221a in the axial direction of the fixed scroll 1. In a specific embodiment, when the thickness of the air layer between the first end surface 211a and the second end surface 221a (i.e., the thickness of the air layer in the first chamber 20 a) is not uniform, the sound damping effect can be improved to some extent, and the accurate sound damping effect for the natural frequency of the exhaust cover 3 is reduced, but the overall sound damping frequency range is enlarged. When the thickness of the air in the first chamber 20a is uniform and L, a more accurate noise reducing effect with respect to the natural frequency of the exhaust cover 3 can be obtained.

Referring again to fig. 6, in some embodiments, the first end surface 211a is parallel to the second end surface 221a, and the distance between the first end surface 211a and the second end surface 221 a=l along the axial direction of the fixed scroll 1. I.e. the distance between the first end surface 211a and the second end surface 221a (i.e. the thickness of the air layer in the first chamber 20 a) remains uniform and L, at which time a more accurate noise reducing effect for the natural frequency of the exhaust cover 3 can be obtained.

In some embodiments, the first cover member 21 and the second cover member 22 are cover structures. Specifically, referring to fig. 8 to 10, the silencing portion 2100 further includes a first side blocking portion 212, the first side blocking portion 212 is located at a side of the first end cap portion 211 facing the fixed scroll 1, the first side blocking portion 212 extends along an axial direction of the fixed scroll 1, the second end cap portion 221 has a second side blocking portion 222 facing a side of the fixed scroll 1, the second side blocking portion 222 extends along the axial direction of the fixed scroll 1, the resonant cavity 20 further includes a second chamber 20b, and the second chamber 20b is located between the first side blocking portion 212 and the second side blocking portion 222; referring to fig. 9 and 10, in some embodiments, a side of the first side baffle 212 facing the second chamber 20b has a first side 212a, a side of the second side baffle 222 facing the second chamber 20b has a second side 222a, and an average distance=l between the first side 212a and the second side 222 a. Wherein the average distance between the first side 212a and the second side 222a is the average thickness of the air in the second chamber 20b, and is L. When the thickness of the air in the second chamber 20b is not uniform, the sound-deadening effect can be improved to some extent, the accurate sound-deadening effect against the natural frequency of the exhaust cover 3 is reduced, but the entire sound-deadening frequency band range is enlarged. Of course, in other embodiments, the air layer in the second chamber 20b may also be of uniform thickness, in which case a more accurate noise attenuation effect for the natural frequency of the exhaust cover 3 may be obtained.

Referring again to fig. 8-10, in some embodiments, the first side stop 212 has a first through hole 210; the silencing area can be increased by using the first through holes 210 of the first side blocking portion 212, and in this embodiment, the number of the first through holes 210 may be 1 or more than 2; the second side blocking part 222 is provided with a second through hole 220; in a specific embodiment, each first through hole 210 of the first side baffle portion 212 and each second through hole 220 of the second side baffle portion 222 are staggered, so that the sound waves do not directly exit through the second through holes 220 of the second side baffle portion 222 after passing through the first through holes 210 of the first side baffle portion 212, but form enough reflective rebound areas to achieve a better sound attenuation effect. In this embodiment, the number of the second through holes 220 may be 1 or 2 or more. The distribution positions of the first through holes 210 are not specifically limited in the present application, and in some embodiments, the first through holes 210 are all distributed in the first end cover 211, or the first through holes 210 are all distributed in the first side baffle 212; in other embodiments, a portion of the first through holes 210 may be disposed at the first end cap 211, and another portion of the first through holes 210 may be disposed at the first side stop 212. In order to reduce the volume of the compressor and reduce the height of the muffler assembly 2, referring to fig. 8, in a specific embodiment, the first end cover 211 and the first side baffle 212 are provided with first through holes 210, the first end cover 211 has more holes, the first side baffle 212 has fewer holes, and the requirement for the height of the first side baffle 212 is lower.

In some specific embodiments, the thickness of the first end cap portion 211 and the first side stop portion 212 may also be the same and equal to the average thickness of the sound attenuating portion 2100. When the first end cover portion 211 and the first side stopper portion 212 are both of uniform thickness, a more accurate noise reducing effect with respect to the natural frequency of the exhaust cover 3 can be obtained. The thicknesses of the first end cap 211 and the first side stopper 212 are not necessarily uniform due to processing errors or the like, and if the average thickness out of tolerance is not large, the noise cancellation effect is not greatly affected. Further, the uneven thickness can obtain a wider sound-deadening band, and the sound-deadening effect is reduced for a specific sound-deadening frequency (for example, the natural frequency of the exhaust cover 3), but the sound-deadening effect is still provided. The average thickness of the sound deadening portion 2100 is an empirical value, and in a specific embodiment, the thicknesses of the first end cap portion 211 and the first side stopper portion 212 are both 0.001m and are uniform. Of course, in other embodiments, the second end cap 221 and the second side baffle 222 may have the same thickness and have a uniform thickness, which is equal to the average thickness of the silencer 2100.

Referring to fig. 8 to 10 again, in some embodiments, the first through hole 210 and the second through hole 220 are circular holes, and the aperture of the second through hole 220 is not smaller than the aperture of the first through hole 210. By adopting the structure, the adverse effects of untimely exhaust, pressure drop and the like caused by overlarge damping can be reduced. In addition, since the friction force is generated when the gas is discharged through the first through hole 210 and the second through hole 220, when the first through hole 210 and the second through hole 220 are non-circular holes such as square holes, stress concentration is caused, so that the noise attenuation assembly 2 is easily damaged, and the durability is reduced; in this embodiment, the first through holes 210 and the second through holes 220 are round holes, so that stress is dispersed more evenly, and durability is improved. In some embodiments, the apertures of each first through hole 210 of the silencer 2100 are the same. The sizes of the apertures of the first through holes 210 are inconsistent due to processing errors and the like, so that the noise elimination effect is reduced for specific frequencies (such as the natural frequency of the exhaust cover 3), but the inconsistent apertures bring wider noise elimination frequency bands, and the noise elimination effect is better under the condition that the average value of the apertures is not too bad. The average pore diameter of the first through holes 210 is an empirical value, and in a specific embodiment, the pore diameter of each first through hole 210 is 0.001m. The small aperture can increase the frequency when the sound passes through, and when the frequency of partial noise is increased to be out of the range which can be identified by human ears, a certain silencing effect can be achieved.

Referring again to fig. 2, in some embodiments, the muffler assembly 2 further has a first exhaust chamber 200, the first exhaust chamber 200 being located between the first cover member 21 and the fixed scroll 1, the exhaust hole 11 being communicable with the first exhaust chamber 200, and the first through hole 210 being for communication between the first exhaust chamber 200 and the resonance chamber 20; the exhaust cover 3 has an exhaust port 31, the exhaust port 31 communicates with the second exhaust chamber 300, and the second through hole 220 is used for communication of the second exhaust chamber 300 with the resonance chamber 20. In some specific embodiments, at least one of the first cover member 21 and the second cover member 22 is connected to the fixed scroll 1, and the overall structure can be simplified, and the assembly is facilitated. Of course, in other embodiments, the first cover member 21 and the second cover member 22 may be respectively connected with the fixed scroll 1, so that the overall structure of the muffler assembly 2 is further simplified, the first cover member 21 and the second cover member 22 are convenient to process, and the processing difficulty is reduced.

Referring again to fig. 6, in some embodiments, the compressor further includes an exhaust valve 12 and an exhaust valve limiting member 13, the exhaust valve 12 and the exhaust valve limiting member 13 are located in the first exhaust chamber 200, the exhaust valve 12 and the exhaust valve limiting member 13 are connected with the fixed scroll 1, the exhaust valve 12 is located between the fixed scroll 1 and the exhaust valve limiting member 13, and the exhaust valve 12 is used for communicating or blocking the exhaust hole 11 with the first exhaust chamber 200; the exhaust valve 12 is used for controlling the opening and closing of the exhaust hole 11, when the compression pressure of the refrigerant reaches a certain value, the exhaust valve 12 is pressed open, and the compressed refrigerant is discharged from the exhaust hole 11; wherein the exhaust valve limiting member 13 is used for limiting the opening degree of the exhaust valve 12;

referring to fig. 4, 8 and 9 again, the muffler assembly 2 further includes a first limiting portion 214, the exhaust valve 12 and the exhaust valve limiting member 13 are located between the first limiting portion 214 and the fixed scroll 1, the compressor further includes a connecting member 14, and the first limiting portion 214 is connected with the exhaust valve 12, the exhaust valve limiting member 13 and the fixed scroll 1 through the connecting member 14. In this embodiment, one or more connecting members 14 may be used to fix the first limiting portion 214, the exhaust valve 12, and the exhaust valve limiting member 13 at the same time, so that the assembly is convenient, and the first limiting portion 214 may abut against the exhaust valve 12 and the exhaust valve limiting member 13 to limit, so that the fixation is more firm.

Some of the technical implementations in the above embodiments may be combined or replaced.

The technical principles of the present application have been described above in connection with specific embodiments, but it should be noted that the above descriptions are only for explaining the principles of the present application and should not be construed as limiting the scope of the present application in any way. Other embodiments of the application, or equivalents thereof, will suggest themselves to those skilled in the art without undue burden from the present disclosure, based on the explanations herein.

Claims

1. A compressor comprising a fixed scroll and a muffler assembly, the muffler assembly comprising a first cover member and a second cover member, the muffler assembly having a resonant cavity between the first cover member and the second cover member;

2. The compressor of claim 1, further comprising a connector by which at least one of the first and second cover members is connected to the fixed scroll;

the first cover part comprises a first fixing part and/or the second cover part comprises a second fixing part, and the first fixing part and/or the second fixing part are/is connected with the fixed scroll through a connecting piece.

3. The compressor of claim 2, wherein each of the first fixing portions of the first cover member is disposed corresponding to each of the second fixing portions of the second cover member, the corresponding disposed first and second fixing portions being distributed along an axial direction of the fixed scroll, the corresponding disposed first and second fixing portions being connected to the fixed scroll by a connecting member.

4. A compressor according to claim 3, wherein the second cover member further includes second through grooves, each of which is disposed in correspondence with each of the second fixing portions, the second through grooves and the second fixing portions disposed in correspondence are distributed along the axial direction of the fixed scroll, and the first fixing portions penetrate through the second through grooves.

5. The compressor of claim 1, wherein the first cover member includes a first end cover portion and the second cover member includes a second end cover portion, the first and second end cover portions being distributed along an axial direction of the fixed scroll;

the first end cap portion has a first through hole;

the resonant cavity comprises a first cavity, a first end face is arranged on one side, facing the first cavity, of the first end cover part, a second end face is arranged on one side, facing the first cavity, of the second end cover part, and the first end face is parallel to the second end face.

6. The compressor of claim 5, wherein a side of the first end cap portion facing the fixed scroll has a first side stop portion extending in an axial direction of the fixed scroll, a side of the second end cap portion facing the fixed scroll has a second side stop portion extending in an axial direction of the fixed scroll, and the resonant cavity further includes a second chamber between the first and second side stop portions;

the first side blocking part is provided with a first through hole, the second side blocking part is provided with a second through hole, and the first through holes of the first side blocking part and the second through holes of the second side blocking part are staggered.

7. The compressor of claim 1, wherein the first and second through holes are circular holes, and the second through hole has a pore diameter not smaller than that of the first through hole.

8. The compressor of claim 1, further comprising an exhaust valve and an exhaust valve stop, the exhaust valve and exhaust valve stop being at least partially located in the first exhaust chamber, the exhaust valve and exhaust valve stop being connected to the fixed scroll, the exhaust valve being located between the fixed scroll and the exhaust valve stop, the exhaust valve being for communication or blocking of the exhaust port with the first exhaust chamber;

the silencing assembly further comprises a first limiting part, the exhaust valve and the exhaust valve limiting part are located between the first limiting part and the fixed scroll, the compressor further comprises a connecting piece, and the first limiting part is connected with the exhaust valve, the exhaust valve limiting part and the fixed scroll through the connecting piece.

9. The compressor of claim 8, wherein the first limit portion is connected to a first cover member, the second cover member has a first through slot, and the first limit portion extends through the first through slot;

the first limiting part extends along a direction perpendicular to the axis of the fixed scroll.

10. The compressor of any one of claims 1 to 9, further comprising a discharge cover having a second discharge chamber between the discharge cover and the fixed scroll, the muffler assembly being located in the second discharge chamber, the discharge cover having a discharge port in communication with the second discharge chamber, the second through-hole for communication of the resonance chamber and the second discharge chamber.