CN217421535U - Silencer, one-way valve and scroll compressor - Google Patents

Abstract

The utility model relates to a check valve, muffler and scroll compressor. The compressor includes a compression mechanism adapted to compress a fluid and defining a discharge space, the compression mechanism including a discharge port from which the fluid compressed by the compression mechanism is discharged to the discharge space via a muffler to be discharged to an outside of the compressor, the muffler including a plurality of muffling passages juxtaposed, each of the muffling passages including a muffling chamber and a through hole, at least two of the muffling passages having different configurations adapted to attenuate different predetermined frequencies of noise from each other. In one aspect, a check valve is provided that includes a valve plate including a central bore, a valve plate guide stop including a guide pin inserted into the central bore, and a bead surrounding the central bore for clearance fitting of the valve plate with the guide pin in surface contact. The utility model provides a muffler with improve noise reduction function and processing are simple and eliminate the check valve of abnormal sound.

Description

Silencer, one-way valve and scroll compressor

Technical Field

The utility model relates to a muffler, check valve and scroll compressor, especially, the utility model relates to a be applied to scroll compressor's muffler and check valve, the utility model discloses still relate to the scroll compressor who disposes this kind of muffler and check valve.

Background

The statements in this section merely provide background information related to the present disclosure and may not constitute prior art.

Scroll compressors belong to positive displacement compression machines. The compression mechanism of a scroll compressor generally includes a non-orbiting scroll member and an orbiting scroll member. The vanes of the non-orbiting and orbiting scroll members engage each other to compress a working fluid (e.g., refrigerant). Generally, after a working fluid is introduced into a compression mechanism from a suction port, compression of the working fluid is achieved by movement of a fixed scroll part and a movable scroll part, and a compressed high-pressure gas is discharged through a discharge port.

The prior art provides mufflers with cross holes for the discharge of gases, which, however, have the disadvantage that: the range of frequencies that can be suppressed is limited; the structural requirement is high in production process and high in cost.

The prior art also provides a check valve for discharging gas, however, under some conditions, for example, low speed HCR conditions, the valve plate cannot be held stable, resulting in abnormal noise.

There is a need for further improvement of noise reduction function, reliability, production process and manufacturing cost of the prior art compressor.

SUMMERY OF THE UTILITY MODEL

It is an object of the present invention to provide an improved muffler having differently configured muffling passageways to provide attenuation of a wider range of frequencies of noise.

It is an object of the present invention to provide an improved two-piece muffler that provides a simple, low cost part to manufacture.

An object of the utility model is to provide a check valve with improved reliability and noise reduction function.

The utility model provides a muffler for compressor, the compressor is including being suitable for the compressing mechanism that the fluid compresses and being limited with discharge space, compressing mechanism includes the discharge port, through the fluid that compressing mechanism compressed is followed the discharge port via the muffler discharges extremely discharge space and then discharge extremely the outside of compressor, the muffler includes a plurality of amortization passageways that parallel, and every amortization passageway includes amortization room and through-hole, two at least amortization passageways in the amortization passageway have and are suitable for the noise of the predetermined frequency of difference to subdue the different structure each other.

Advantageously, the silencing channels with mutually different configurations have different volumes and/or numbers and/or shapes of silencing chambers and/or through holes with different cross-sectional flow areas and/or numbers and/or lengths.

Advantageously, the silencer is constructed as a two-piece silencer comprising a first half and a second half, the first half being fixedly connected to the second half.

Advantageously, said first half comprises a first half-hole and said second half comprises a corresponding second half-hole, said first half-hole cooperating with said second half-hole to form said through hole for the passage of the fluid.

Advantageously, the first half comprises: a first base wall serving as a top wall of the muffler, a first inner circumferential wall extending axially from the first base wall, and a first outer circumferential wall extending axially from the first base wall and spaced radially outwardly from the first inner circumferential wall, the second half including: a second base wall, a second inner circumferential wall extending axially from said second base wall, and a second outer circumferential wall extending axially from said second base wall spaced radially outwardly from said second inner circumferential wall, said first inner circumferential wall cooperating with said second inner circumferential wall to form an inner circumferential wall and said first outer circumferential wall cooperating with said second outer circumferential wall to form an outer circumferential wall to define an inner sound-deadening chamber radially inwardly and an outer sound-deadening chamber radially outwardly.

Advantageously, the first half further comprises: a first radial divider wall of at least one connected between the first inner circumferential wall and the first outer circumferential wall, the second half further comprising: at least one second radial dividing wall connected between the second inner and outer circumferential walls, the first and second radial dividing walls cooperating to divide the outer muffling chamber into a plurality of separate outer muffling chambers.

Advantageously, the plurality of independent outer muffling chambers have different heights and thus different volumes.

Advantageously, the first half and the second half are fixedly connected by screwing at the first radial partition wall and at the second radial partition wall.

Advantageously, the through holes comprise an inner through hole provided at the inner circumferential wall and an outer through hole provided at the outer circumferential wall, the inner and outer through holes being configured to divert fluid.

Advantageously, the through hole further comprises one or more inlet holes provided at the second base wall, the inner muffling chamber receiving the fluid from the discharge port via the inlet holes, the outer muffling chamber discharging the fluid to the discharge space via the outer through hole.

Advantageously, the axial position and/or the circumferential position of the inner through hole and/or the outer through hole of the sound-deadening channel having different configurations from each other are different to realize different fluid flow paths.

Advantageously, the inner through hole and the outer through hole are arranged at different axial and/or circumferential positions to achieve multiple turns of the fluid.

Advantageously, the inner through holes and/or the outer through holes of each silencing duct are a plurality of through holes arranged in the circumferential direction and/or the number of inner through holes is less than the number of outer through holes.

Advantageously, the axial position of the inner through hole is lower than the axial position of the outer through hole.

Advantageously, the silencer is a powder metallurgy component.

Advantageously, the muffler further comprises a one-way valve, the one-way valve comprises a valve plate and a valve plate guide limiting member, the valve plate comprises a central hole and a flange surrounding the central hole, and the valve plate guide limiting member comprises a guide pin inserted into the central hole.

Advantageously, the valve plate is arranged inside the muffler and is adapted to selectively open and close an inlet orifice of the muffler adapted to introduce the fluid from the discharge port into the muffler so that the one-way valve constitutes an inside one-way valve; or the valve sheet is disposed at an outer side of the muffler and adapted to selectively open and close a discharge hole of the muffler adapted to discharge the fluid in the muffler to the discharge space such that the one-way valve constitutes an outer one-way valve.

Advantageously, in the case of the inboard one-way valve, the upper end of the guide pin is fixed to the top wall of the muffler and the top wall of the muffler serves to restrict the axial upward movement of the valve plate so as to constitute a part of the valve plate guide stopper, and in the case of the outboard one-way valve, the lower end of the guide pin is fixed to the top wall of the muffler and the upper end is provided with a stopper portion adapted to restrict the axial upward movement of the valve plate, and the stopper portion defines a groove for accommodating the burring.

The utility model also provides a check valve for muffler of compressor, the check valve includes valve block and valve block direction stop member, the valve block includes the central hole, valve block direction stop member is including inserting the uide pin in central hole, the valve block still includes and centers on the turn-ups in central hole makes the valve block with the uide pin carries out clearance fit with the mode of face contact.

Advantageously, the valve plate is arranged inside the muffler and is adapted to selectively open and close a fluid inlet hole of the muffler so that the one-way valve constitutes an inside one-way valve; or the valve sheet is disposed at an outer side of the muffler and adapted to selectively open and close the fluid discharge hole of the muffler such that the check valve constitutes an outer check valve.

Advantageously, in the case of the inboard one-way valve, the upper end of the guide pin is fixed to the top wall of the muffler and the top wall of the muffler serves to restrict the axial upward movement of the valve plate so as to constitute a part of the valve plate guide stopper, and in the case of the outboard one-way valve, the lower end of the guide pin is fixed to the top wall of the muffler and the upper end is provided with a stopper portion adapted to restrict the axial upward movement of the valve plate, and the stopper portion defines a groove for accommodating the burring.

The utility model also provides a compressor, the compressor includes according to foretell check valve.

Advantageously, the compressor is an inverter scroll compressor.

Thus, the present invention provides a muffler having a structurally different muffling passageway to provide attenuation of a wider range of frequencies of noise. And the present invention also provides an improved two-piece muffler to provide a simple, low cost part to manufacture. The utility model also provides a check valve of modified reliability and noise reduction function.

Drawings

Features and advantages of embodiments of the present invention will become more readily understood from the following description with reference to the accompanying drawings, in which:

fig. 1 illustrates a longitudinal cross-sectional view of a scroll compressor in accordance with an exemplary embodiment of the present invention, wherein a two-piece muffler is shown.

Fig. 2 shows a perspective sectional view of the two-piece muffler of fig. 1 with differently configured muffler passages.

FIG. 3 shows a perspective view of a first half of the muffler of FIG. 2.

FIG. 4 illustrates a perspective view of a second half of the muffler of FIG. 2.

FIG. 5 illustrates a partial longitudinal cross-sectional view of a scroll compressor showing a muffler having a check valve in accordance with another aspect of an embodiment of the present invention.

Fig. 6 shows a perspective view of the valve plate of the check valve of fig. 5.

Fig. 7 shows a perspective cross-sectional view of a muffler with a check valve according to yet another aspect of an embodiment of the present invention.

FIG. 8 shows a perspective view of the valve plate of the check valve of FIG. 7.

Detailed Description

The following description of the preferred embodiment(s) is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. The same or similar reference numerals are used in the respective drawings to denote the same components, and thus the configurations of the same components will not be described repeatedly.

Although the valve assembly according to the present invention is described herein in connection with a scroll compressor. However, it will be appreciated that the valve assembly according to the present invention is not limited in its application to scroll compressors, and may be applied to any other application where a restriction to the flow of fluid is required. Further, in the following description of the exemplary embodiments, the valve assembly is mounted at the central aperture of the partition, however, depending on the location of the aperture (or called the compression mechanism discharge aperture) described below, the valve assembly according to the present invention may also be mounted at other locations of the scroll compressor without limitation in the arrangement exemplified herein.

The basic configuration and principle of the scroll compressor 10 according to the embodiment of the present invention will be described below with reference to fig. 1.

As shown in FIG. 1, a scroll compressor 10 includes a generally cylindrical housing 12, a top cover 14 disposed at one end of the housing 12, and a bottom cover 16 disposed at the other end of the housing 12. A cylindrical shell 12, a top cover 14 and a bottom cover 16 form the outer shell of the scroll compressor 10. It should be understood that the housing of the scroll compressor 10 may vary depending on the particular application, and for example, may be closed or may be semi-closed (e.g., omitting the bottom cover 16).

A partition plate 15 for partitioning an internal space of the compressor into a high pressure side and a low pressure side may be provided in a housing of the scroll compressor (also simply referred to as "compressor") 10, particularly between the top cover 14 and the shell 12. The high pressure side is defined between the partition 15 and the top cover 14, and the low pressure side is defined between the partition 15, the housing 12 and the bottom cover 16. An intake joint (not shown) for sucking a working fluid (e.g., refrigerant) is provided at a low pressure side, and a discharge joint 18 for discharging the compressed working fluid is provided at a high pressure side. When the compressor is operated, a low-temperature, low-pressure working fluid enters a low-pressure side of the compressor 10 through an intake joint, is compressed into a high-temperature, high-pressure working fluid and is discharged to a high-pressure side, and then is discharged out of the compressor 10 through a discharge joint 18.

A motor 20, a rotary shaft 30, and a compression mechanism are provided in a casing of the compressor 10. The motor 20 is constituted by a stator and a rotor and is configured to drive the rotation shaft 30 to rotate. The rotation shaft 30 is fixedly connected to a rotor of the motor 20. The compression mechanism includes a non-orbiting scroll member 80 and an orbiting scroll member 70. Rotating shaft 30 is configured to drive orbiting scroll member 70 relative to non-orbiting scroll member 80.

Compressor 10 also includes a main bearing housing 40. Main bearing housing 40 is fixedly attached to cylindrical housing 12 and is located within housing 12. Main bearing housing 40 is configured to support a compression mechanism, specifically orbiting scroll member 70. The rotary shaft 30 is rotatably supported by a main bearing provided in a main bearing housing 40. A lubricant passage is provided in the rotary shaft 30 to supply lubricant at the bottom cover 16 to the various bearings and other movable parts of the compressor 10.

Orbiting scroll member 70 includes an end plate 72, a hub 74 formed on one side of the end plate, and a helical blade 76 formed on the other side of the end plate. Non-orbiting scroll member 80 includes an end plate 82, a spiral vane 86 formed on one side of the end plate, and a discharge port 88 formed at a substantially central position of the end plate. Wherein the discharge port 88 communicates with an upwardly opening recess 89, which recess 89 in turn is in fluid communication with a discharge space 90 defined by the top cover 14 and the partition 15. An annular recess 92 is formed in non-orbiting scroll member 80. Within this recess 92 is disposed a floating seal assembly. Recesses 89, 92 cooperate with the floating seal assembly to define axial pressure biasing chambers that receive pressurized fluid compressed by vanes 76, 86 to apply an axial biasing force to non-orbiting scroll member 80 to force the tips of each vane 76, 86 into sealing engagement with the opposing end plate surfaces of end plates 72, 82, respectively.

A series of compression chambers of decreasing volume from the radially outer side to the radially inner side are formed between spiral vane 86 of non-orbiting scroll member 80 and spiral vane 76 of orbiting scroll member 70. The radially outermost compression pocket is at suction pressure and the radially innermost compression pocket is at discharge pressure. The intermediate compression chamber is between the suction pressure and the discharge pressure and is therefore also referred to as the intermediate pressure chamber.

One end of the rotating shaft 30 is provided with an eccentric crank pin 36. Eccentric crank pin 36 fits within hub 74 of orbiting scroll member 70. A relief bushing may be disposed between eccentric crank pin 36 and hub 74 of orbiting scroll member 70. When motor 20 is activated, eccentric crank pin 36 of rotatable shaft 30 drives hub 74 of orbiting scroll member 70 such that orbiting scroll member 70 is able to translate and rotate (i.e., the central axis of orbiting scroll member 70 moves about the central axis of non-orbiting scroll member 80, but orbiting scroll member 70 does not itself rotate about its central axis) relative to non-orbiting scroll member 80 to effect compression of the working fluid in a series of compression chambers. The translational rotation is accomplished by an oldham ring (not shown) disposed between non-orbiting scroll member 70 and orbiting scroll member 80.

The muffler 200 will now be described with reference to fig. 1 to 4. The muffler includes a plurality of silencing passages juxtaposed, each of the silencing passages including a silencing chamber and a through hole, at least two of the silencing passages having different configurations from each other adapted to attenuate different predetermined frequencies of noise. Here, the "sound-deadening chamber" may refer to a space having a large volume, and the "through-hole" may refer to an opening formed at a wall body, and may include an inlet hole, an intermediate hole, and an outlet hole. By the plurality of silencing passages with different structures, the noise of a plurality of different preset frequency bands can be reduced, so that the range of the suppressive noise frequency is expanded. In one aspect of an embodiment of the invention, the sound-damping ducts having mutually different configurations have sound-damping chambers of different volume and/or number and/or shape and/or through-openings of different flow cross-sectional area and/or number and/or length. The "volume" here may refer to the total volume, and the "flow cross-sectional area" may refer to the total through-hole flow cross-sectional area.

Referring to fig. 2-4, the muffler 200 may be constructed as a two-piece muffler including a first half 210 and a second half 220, the first half fixedly coupled to the second half. This makes the production process and process of the silencer simpler, for example, by avoiding the use of milling machines or forging machines for machining the cross-holes. As shown, the first half 210 includes a first half-bore 211 and the second half 220 includes a corresponding second half-bore 221 that cooperate to form a through-bore for passage of fluid. The through-hole is formed by half-holes fitting, greatly facilitating the processing of the through-hole, and in addition, such through-hole is implemented as a cross-hole to effect the turning or turning of the fluid, and particularly, to convert the fluid axially flowing into the muffler into the fluid radially/laterally discharged from the muffler, thereby providing improved noise reduction. It should be noted that the term "half" of the "half holes" may be strictly two half holes each having 50%, or may mean that two different partial recesses cooperate to form the entire through hole. One skilled in the art will also appreciate that only one half may be notched, as may the other half.

With respect to the two-piece component of the muffler, the first half 210 may include: a first base wall 212, which serves as the top wall of the muffler, a first inner circumferential wall 213 extending axially from the first base wall, and a first outer circumferential wall 214 extending axially from the first base wall and spaced radially outwardly from the first inner circumferential wall. And the second half 220 may include: a second base wall 222, a second inner circumferential wall 223 extending axially from the second base wall, and a second outer circumferential wall 224 extending axially from the second base wall and spaced radially outwardly from the second inner circumferential wall. The first inner circumferential wall 213 cooperates with the second inner circumferential wall 223 to form an inner circumferential wall and the first outer circumferential wall 214 cooperates with the second outer circumferential wall 224 to form an outer circumferential wall to define an inner sound-deadening chamber 230 radially inside and an outer sound-deadening chamber 240 radially outside. Thus, multiple stages of muffling chambers, an upstream inner muffling chamber 230 and a downstream outer muffling chamber 240, may be formed by the mating of the base walls of the two halves and the radially spaced inner and outer circumferential walls.

Referring again to fig. 2 and 3, the first half 210 may further include: at least one first radial separation wall 215 connected between the first inner and outer circumferential walls. The second half 220 may further include: at least one second radial separation wall 225 connected between the second inner circumferential wall and the second outer circumferential wall. The first radial partition wall 215 cooperates with the second radial partition wall 225 to partition the outer muffling chamber into a plurality of separate outer muffling chambers.

By virtue of this configuration, the sizes of the configurations of the partitioned inner and outer sound-deadening chambers can be made different, thereby realizing sound-deadening passages having different configurations, so that the attenuation of a wider range of frequency band of noise is realized. While three radial divider walls are shown in the drawings to separate the outer muffler chamber into three separate muffler chambers, it will be appreciated by those skilled in the art that a specific number of radial divider walls may be provided to achieve a specific number of separate outer muffler chambers, as desired, e.g., for a range of noise frequency bands to be attenuated, e.g., if noise reduction is desired for higher frequency bands, more separate muffler chambers, and thus smaller in volume, may be separated

In one aspect of an embodiment of the present invention, the plurality of independent outer muffling chambers have different heights and thus different volumes, for example, in the case where the radial dimension and the circumferential dimension are the same, the depth/height/axial dimension is configured to be different, so that the volumes of the independent outer muffling chambers are different.

Advantageously, the first half is fixedly connected to the second half by screwing at the first 215 and second 225 radial partition walls. Furthermore, the wall thickness of the radial partition wall can be configured to have a greater thickness without resulting in an excessively large radial dimension of the muffler or an excessively reduced volume of the sound-deadening chamber, so that a screw connection at the radial partition wall is advantageous, which facilitates a fixed connection of the two-piece muffler.

The through-hole structure of the muffler 200 will be described below with reference to fig. 2 to 4.

The through-holes may include an inner through-hole 250 disposed at the inner circumferential wall and an outer through-hole 260 disposed at the outer circumferential wall, the inner and outer through-holes configured to divert fluid. For example, as shown, the inboard through-hole serves as a center hole for the muffler and the outboard through-hole serves as a discharge hole for the muffler. The through-holes may further include one or more inlet holes (see fig. 4) provided at the second base wall 222, through which the inner muffling chamber 230 receives fluid from the discharge port 88, and the outer muffling chamber 240 discharges the fluid to the discharge space 90 through the outer through-holes 260.

In one aspect of an embodiment of the present invention, the axial position and/or the circumferential position of the inside through hole and/or the outside through hole of the silencing passage having different configurations from each other are different to realize different fluid flow paths, thereby realizing the silencing passage having different configurations.

In another aspect of an embodiment of the invention, the inner through hole and the outer through hole are arranged in different axial and/or circumferential positions to enable multiple turns of the fluid. This enhances the attenuation of fluid noise by arranging the inboard and outboard through holes at different axial and/or axial positions (i.e., misaligning the inboard and outboard through holes) so that the fluid is more diverted and the diverted path covers as much space of the anechoic chamber as possible.

As shown in fig. 2, the inside through-hole and/or the outside through-hole of each sound-deadening channel may be a plurality of through-holes arranged in the circumferential direction, and/or the number of inside through-holes may be smaller than the number of outside through-holes. In addition to arranging the inside through hole and the outside through hole at different axial/circumferential positions, by providing a plurality of through holes for each sound-deadening channel, the fluid path is as complicated as possible, further enhancing the attenuation of fluid noise.

It can also be seen in fig. 2 that the axial position of the inboard through bore 250 is lower than the axial position of the outboard through bore 260. This avoids machining a hole in a position near below the outer circumferential wall because the lower portion of the outer circumferential wall needs to be interference-fitted with the sound-absorbing panel (partition panel), because the portion near below of the outer circumferential wall is not suitable for machining a hole, which would otherwise affect the interference fit. Also, this configuration realizes different sound deadening passages on the flow path, so that the attenuation of a wider range of frequency band of noise is realized.

In an advantageous aspect of an embodiment of the present invention, the silencer is a powder metallurgy component, which makes the part production manufacturing process simple and low cost.

The working fluid compressed by the non-orbiting scroll member 70 and the orbiting scroll member 80 is discharged to a high pressure side through a discharge port 88. In order to prevent the backflow of the discharge fluid of the high pressure side into the compression mechanism via the discharge port 88, a check valve for use in cooperation with the muffler is provided, which may be configured to allow the working fluid in the compression chamber of the compression mechanism to flow to the discharge space 90 of the high pressure side, but to prevent the backflow of the discharged fluid of the discharge space 90 into the compression chamber.

The check valves 270 and 270' of the present invention will be described with reference to fig. 5 to 8.

The check valve may include a valve plate 280, 280 ' and a plate guide and stopper member 290, 290 ', the valve plate including a central hole 281, 281 ', the plate guide and stopper member 290, 290 ' including a guide pin 291, 291 ' inserted into the central hole, the valve plate further including a flange 281a, 281a ' surrounding the central hole such that the valve plate is clearance-fitted in surface contact with the guide pin 291, 291 '.

According to the check valve, the valve plate is in clearance fit with the center hole with the flange of the valve plate guide fixer, and compared with the line contact guide of the valve plate in the prior art, the check valve provides improved surface contact guide for the valve plate, so that the centering degree and the surface roughness of two valve seats are not required, the requirement on machining of the valve seat and valve plate fixer is reduced, in addition, the guide pin is inserted into the center hole with the flange, and the standard part is easy to control the geometric dimension. Meanwhile, by means of the flanging design of the central hole, the valve plate jitter is reduced and abnormal sound is eliminated.

In fig. 5, the valve sheet 280 is disposed inside the muffler and adapted to selectively open and close a fluid inlet hole of the muffler or an inlet hole of the muffler adapted to introduce fluid from the discharge port 88 into the muffler, so that the check valve constitutes an inside check valve. Also, the upper end of the guide pin 291 is fixed to the top wall of the muffler, and the top wall of the muffler serves to restrict the upward axial movement of the valve sheet to constitute a part of the sheet guide stopper member 290.

In fig. 7, the valve sheet 280' is disposed at an outer side of the muffler and adapted to selectively open and close a fluid discharge hole of the muffler or a discharge hole of the muffler adapted to discharge fluid in the muffler to a discharge space, so that the check valve constitutes an outer check valve. Also, the lower end of the guide pin 291 ' is fixed to the top wall of the muffler and the upper end is provided with a stopper portion adapted to restrict the axial upward movement of the valve sheet, and the stopper portion defines a groove 292 ' for receiving the burring 281a '. In fig. 7, the stopper portion is formed in an umbrella shape, but of course, the stopper portion may be formed in other shapes as needed.

Although preferred embodiments of the present invention have been described in detail herein, it is to be understood that the invention is not limited to the precise construction herein described and illustrated, and that other modifications and variations may be effected by one skilled in the art without departing from the spirit and scope of the invention. All such modifications and variations are intended to fall within the scope of the claims appended hereto.

Claims (23)

1. A muffler for a compressor, the compressor including a compression mechanism adapted to compress a fluid and defining a discharge space, the compression mechanism including a discharge port from which the fluid compressed by the compression mechanism is discharged to the discharge space via the muffler to an outside of the compressor,

characterized in that the muffler comprises a plurality of muffling passages in parallel, each muffling passage comprising a muffling chamber and a through hole, at least two of the muffling passages having mutually different configurations adapted to attenuate different predetermined frequencies of noise.

2. A silencer according to claim 1, characterized in that the silencing passages with mutually different configurations have different volumes and/or numbers and/or shapes of silencing chambers and/or through-holes with different flow cross-sectional areas and/or numbers and/or lengths.

3. The muffler of claim 1 or 2, wherein the muffler is configured as a two-piece muffler comprising a first half and a second half, the first half being fixedly connected with the second half.

4. The muffler according to claim 3 wherein said first half includes a first half-hole and said second half includes a corresponding second half-hole, said first half-hole and said second half-hole cooperating to form said through-hole for passage of fluid.

5. The muffler of claim 3,

the first half includes: a first base wall serving as a top wall of the muffler, a first inner circumferential wall extending axially from the first base wall, and a first outer circumferential wall extending axially from the first base wall and spaced radially outwardly from the first inner circumferential wall,

the second half includes: a second base wall, a second inner circumferential wall extending axially from the second base wall, and a second outer circumferential wall extending axially from the second base wall spaced radially outwardly from the second inner circumferential wall,

the first inner circumferential wall cooperates with the second inner circumferential wall to form an inner circumferential wall and the first outer circumferential wall cooperates with the second outer circumferential wall to form an outer circumferential wall to define an inner muffling chamber radially inward and an outer muffling chamber radially outward.

6. The muffler of claim 5,

the first half further comprises: at least one first radial partition wall connected between the first inner circumferential wall and the first outer circumferential wall,

the second half further comprises: at least one second radial separation wall connected between the second inner circumferential wall and the second outer circumferential wall,

the first radial partition wall cooperates with the second radial partition wall to partition the outer muffling chamber into a plurality of independent outer muffling chambers.

7. The muffler of claim 6, wherein the plurality of independent outer muffling chambers have different heights and thus different volumes.

8. The muffler of claim 6, wherein the first half and the second half are fixedly connected by a threaded connection at the first radial partition wall and the second radial partition wall.

9. The muffler of claim 5, wherein the through-holes include an inboard through-hole disposed at the inner circumferential wall and an outboard through-hole disposed at the outer circumferential wall, the inboard and outboard through-holes configured to divert fluid.

10. The muffler of claim 9, wherein the through-hole further includes one or more inlet holes provided at the second base wall, the inner muffling chamber receiving the fluid from the discharge port via the inlet holes, the outer muffling chamber discharging the fluid to the discharge space via the outer through-hole.

11. The muffler according to claim 9, wherein axial positions and/or circumferential positions of the inside through holes and/or the outside through holes of the muffling passages having different configurations from each other are different to realize different fluid flow paths.

12. The muffler of claim 9, wherein the inboard through-hole and the outboard through-hole are arranged at different axial and/or circumferential positions to achieve multiple turns of fluid.

13. The silencer of claim 9, wherein the inner through-hole and/or the outer through-hole of each silencing passage is a plurality of through-holes arranged in a circumferential direction, and/or wherein the number of inner through-holes is less than the number of outer through-holes.

14. The muffler of claim 9, wherein an axial position of the inside through hole is lower than an axial position of the outside through hole.

15. The muffler of claim 1 or 2, wherein the muffler is a powder metallurgy component.

16. The muffler of claim 1 or 2, further comprising a check valve including a valve plate and a valve plate guide stopper, the valve plate including a central hole and a flange surrounding the central hole, the valve plate guide stopper including a guide pin inserted into the central hole.

17. The muffler of claim 16, wherein:

the valve sheet is disposed inside the muffler and adapted to selectively open and close an inlet hole of the muffler adapted to introduce the fluid from the discharge port into the muffler such that the check valve constitutes an inside check valve; or

The valve sheet is disposed at an outer side of the muffler and adapted to selectively open and close a discharge hole of the muffler adapted to discharge fluid in the muffler to the discharge space such that the one-way valve constitutes an outer one-way valve.

18. The muffler of claim 17, wherein:

in the case of the inner check valve, the upper end of the guide pin is fixed to the top wall of the muffler, and the top wall of the muffler serves to restrict the upward axial movement of the valve sheet to constitute a part of the sheet guide stopper member,

in the case of the outside check valve, the guide pin has a lower end fixed to the top wall of the muffler and an upper end provided with a stopper portion adapted to restrict the upward axial movement of the valve sheet, and the stopper portion defines a groove for receiving the burring.

19. The utility model provides a check valve for muffler of compressor, the check valve includes valve block and valve block direction stop member, the valve block includes central hole, valve block direction stop member is including inserting the uide pin in central hole, its characterized in that, the valve block still includes around the turn-ups in central hole makes the valve block with the uide pin carries out clearance fit with the mode of face contact.

20. The one-way valve of claim 19, wherein:

the valve sheet is disposed inside the muffler and adapted to selectively open and close a fluid inlet hole of the muffler such that the check valve constitutes an inside check valve; or

The valve sheet is disposed at an outer side of the muffler and adapted to selectively open and close a fluid discharge hole of the muffler such that the check valve constitutes an outer check valve.

21. The one-way valve of claim 20, wherein:

in the case of the inner check valve, the upper end of the guide pin is fixed to the top wall of the muffler, and the top wall of the muffler serves to restrict the upward axial movement of the valve sheet to constitute a part of the sheet guide stopper member,

in the case of the outer check valve, the guide pin has a lower end fixed to a top wall of the muffler and an upper end provided with a stopper portion adapted to restrict upward axial movement of the valve sheet, and the stopper portion defines a groove for receiving the burring.

22. A compressor, characterized in that it comprises a muffler according to any one of claims 1 to 18 or a one-way valve according to any one of claims 19 to 21.

23. The compressor of claim 22, wherein the compressor is an inverter scroll compressor.

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