CN117469168A

CN117469168A - compressor

Info

Publication number: CN117469168A
Application number: CN202311673051.6A
Authority: CN
Inventors: 肖毅伟; 武晓昆; 张益钦; 唐晗; 孟强军
Original assignee: Zhuhai Gree Green Control Technology Co ltd
Current assignee: Zhuhai Gree Green Control Technology Co ltd
Priority date: 2023-12-07
Filing date: 2023-12-07
Publication date: 2024-01-30

Abstract

The present disclosure relates to a compressor, comprising: the compression main body comprises a first shell, wherein the first shell is provided with an exhaust cavity and a first exhaust port, and the first exhaust port is positioned at the tail end of the exhaust cavity; and fall the subassembly (10) of making an uproar for fall to first gas vent exhaust gas, fall the subassembly (10) of making an uproar including second casing (1), second casing (1) are equipped with exhaust runner (11), air inlet (111) and second gas vent (112) are located the both ends of exhaust runner (11) respectively, one end that second casing (1) is close to air inlet (111) detachably connects in the one end that first casing is close to first gas vent, and air inlet (111) and first gas vent intercommunication, second gas vent (112) are used for the exhaust gas after falling the noise.

Description

Compressor

Technical Field

The present disclosure relates to the field of air compression technology, and in particular, to a compressor.

Background

The compression cavity is periodically communicated with the air suction and exhaust cavity in the running process of the screw compressor, so that unstable air flow is caused, and air flow pulsation of the air suction and exhaust cavity is caused, so that vibration noise in the air suction and exhaust cavity is emphasized, and the problem of over-compression or under-compression exists due to high exhaust pressure and exhaust pressure at the end of exhaust of an exhaust end, so that more serious noise is caused by the air flow pulsation in the air exhaust cavity.

Disclosure of Invention

The present disclosure provides a compressor that facilitates obtaining a better noise reduction effect.

The present disclosure provides a compressor, comprising: the compression main body comprises a first shell, wherein the first shell is provided with an exhaust cavity and a first exhaust port, and the first exhaust port is positioned at the tail end of the exhaust cavity; and

the noise reduction assembly is used for reducing noise of gas exhausted from the first exhaust port and comprises a second shell, the second shell is provided with an exhaust runner, an air inlet and a second exhaust port, the air inlet and the second exhaust port are respectively located at two ends of the exhaust runner, one end, close to the air inlet, of the second shell is detachably connected to one end, close to the first exhaust port, of the first shell, the air inlet is communicated with the first exhaust port, and the second exhaust port is used for exhausting the noise-reduced gas.

In some embodiments, the body of the exhaust runner extends in a direction that coincides with the exhaust cavity.

In some embodiments, the exhaust runner extends along a straight line.

In some embodiments, an attenuation chamber is provided on an inner sidewall of the exhaust runner, the attenuation chamber being in communication with the exhaust runner.

In some embodiments, the attenuation chambers are disposed at intervals along the extension direction of the exhaust runner.

In some embodiments, the attenuation chamber is disposed to the left and/or right of the exhaust runner.

In some embodiments, the inner side wall of the second housing is provided with a set of attenuation chambers on the left side and the right side of the exhaust runner, respectively, and each set of attenuation chambers includes a plurality of attenuation chambers arranged at intervals along the extending direction of the exhaust runner.

In some embodiments, the noise reduction assembly further comprises a noise reduction plate mounted on the inner side wall of the second housing, wherein the noise reduction plate is provided with a through hole, and the exhaust runner is communicated with the attenuation cavity through the through hole.

In some embodiments, the noise reduction plate is provided with a through hole, the through hole corresponds to the position of the attenuation cavity, and the through hole is used for enabling the air flow in the exhaust runner to directly enter the attenuation cavity.

In some embodiments, the noise reduction plate is detachably mounted to the second housing.

In some embodiments, the noise reduction assembly includes a plurality of noise reduction plates having different numbers and/or arrangements of perforations, the noise reduction plates being selectively mounted within the second housing depending on the operating conditions of the compressor.

In some embodiments, the penetration rate T on the noise reduction plate is calculated by the following formula:

wherein L is the total length of the exhaust runner; d is the thickness of the noise reduction plate; r is the radius of the perforation; fr is the natural frequency of the attenuation chamber; c ₀ Is the speed of sound of the fluid in the exhaust runner.

In some embodiments, an exhaust bearing seat cavity is further provided in the second housing, the exhaust bearing seat cavity being located at a top of the exhaust runner and in communication with the exhaust runner, a length of the exhaust runner being greater than a length of the exhaust bearing seat cavity.

In some embodiments, an attenuation cavity is arranged on the inner side wall of the exhaust runner adjacent to the exhaust bearing seat cavity, the attenuation cavity is communicated with the exhaust runner, and an inclined surface is formed on the inner side wall of the attenuation cavity, and the inclined surface gradually approaches to the central position of the exhaust runner along the width direction from top to bottom.

In some embodiments, the second housing inner sidewall is provided with a blocking portion at a position where the exhaust bearing housing cavity and the exhaust runner meet, and the blocking portion is consistent with an extending direction of the exhaust runner.

In some embodiments, the compressor is a screw compressor.

According to the compressor disclosed by the embodiment of the disclosure, the noise reduction component is independently arranged outside the compression main body and is not arranged in the air flow channel inside the compression main body, so that the structural layout in the compression main body is more convenient, and the noise reduction component is convenient to install. Moreover, for compressors of different models or different working conditions of the same compressor, a more matched noise reduction assembly can be selected, so that the noise reduction assembly is adapted to different compressors, the noise reduction frequency band requirement is met, a better noise reduction effect is obtained, and the working performance of the compressor is improved. For different working conditions of the same compressor, the multi-frequency band noise reduction of the same compressor can be realized by selecting the matched noise reduction assembly.

Drawings

In order to more clearly illustrate the embodiments of the present disclosure or the solutions in the prior art, the drawings that are required for the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present disclosure, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.

Fig. 1 is a perspective view of some embodiments of a noise reduction assembly in a compressor of the present disclosure.

FIG. 2 is a cross-sectional view of some embodiments of a noise reduction assembly in a compressor of the present disclosure.

Fig. 3 is a left side view of some embodiments of noise reduction assemblies in compressors of the present disclosure.

Fig. 4 is a schematic structural view of the noise reduction plate mounted on the second housing in the noise reduction assembly.

Description of the reference numerals

10. A noise reduction assembly; 1. a second housing; 11. an exhaust runner; 111. an air inlet; 112. a second exhaust port; 12. an exhaust bearing housing cavity; 13. a mounting flange; 131. a hole; 14. a transitional connection part; 2. an attenuation chamber; 3. a noise reduction plate; 31. perforating; 32. a through hole; 4. a blocking part.

Detailed Description

The following description of the technical solutions in the embodiments of the present disclosure will be made clearly and completely with reference to the accompanying drawings in the embodiments of the present disclosure, and it is apparent that the described embodiments are only some embodiments of the present disclosure, not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the disclosure, its application, or uses. Based on the embodiments in this disclosure, all other embodiments that a person of ordinary skill in the art would obtain without carrying out the inventive task are within the scope of protection of this disclosure.

Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, the techniques, methods, and apparatus should be considered part of the specification.

In the description of the present disclosure, it should be understood that the terms "center," "lateral," "longitudinal," "front," "rear," "left," "right," "upper," "lower," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate or are based on the orientation or positional relationship shown in the drawings, merely to facilitate description of the present disclosure and to simplify the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present disclosure.

In the description of the present disclosure, it should be understood that the use of terms such as "first," "second," etc. for defining components is merely for convenience in distinguishing corresponding components, and the terms are not meant to be construed as limiting the scope of the present disclosure unless otherwise indicated.

As shown in fig. 1-4, the present disclosure provides a compressor, in some embodiments, comprising:

the compression main body comprises a first shell, wherein the first shell is provided with an exhaust cavity and a first exhaust port, and the first exhaust port is positioned at the tail end of the exhaust cavity; and

the noise reduction assembly 10 is configured to reduce noise of gas exhausted from the first exhaust port, the noise reduction assembly 10 includes a second housing 1, the second housing 1 is provided with an exhaust runner 11, an air inlet 111 and a second exhaust port 112, the air inlet 111 and the second exhaust port 112 are respectively located at two ends of the exhaust runner 11, one end of the second housing 1 close to the air inlet 111 is detachably connected to one end of the first housing close to the first exhaust port, the air inlet 111 is communicated with the first exhaust port, and the second exhaust port 112 is configured to exhaust the noise reduced gas.

The compression body is used for realizing gas compression, the exhaust cavity is arranged at the downstream of the compression cavity along the gas flow direction, high-pressure gas compressed in the compression cavity enters the exhaust cavity and is discharged through the first exhaust port, then enters the exhaust runner 11 of the noise reduction assembly 10 through the air inlet 111 for noise reduction treatment, and is discharged through the second exhaust port 112.

The specific size of the discharge flow path 11 may be determined according to the discharge capacity of the compressor, and a general flow rate of gas is set to 10 + -1 m/s, whereby the cross-sectional area of the discharge flow path 11 is designed according to the specific discharge capacity of the compressor.

As shown in fig. 1, the end of the second housing 1 near the first housing is provided with a mounting flange 13, and a plurality of holes 131 are circumferentially spaced on the mounting flange 13 to mount the second housing 1 to the first housing by fasteners. For example, the fastener may be a screw, bolt, or the like.

In this embodiment, the noise reduction assembly 10 is independently installed outside the compression body, and is not arranged in the air flow channel inside the compression body, so that the structural layout inside the compression body is more convenient, and the installation of the noise reduction assembly 10 is facilitated. Moreover, for compressors of different models or different working conditions of the same compressor, the noise reduction assembly 10 which is more matched can be selected, so that the noise reduction assembly 10 is adapted to different compressors, the noise reduction frequency band requirement is met, a better noise reduction effect is obtained, and the working performance of the compressor is improved. For different working conditions of the same compressor, multi-frequency band noise reduction of the same compressor can be realized by selecting the matched noise reduction assembly 10.

In addition, the noise reduction assembly 10 is designed into an integral structure, has the characteristics of tightness, compactness and simplified assembly, is convenient to install, and is suitable for mass production.

In some embodiments, the body of the exhaust runner 11 extends in a direction that coincides with the exhaust cavity.

According to the embodiment, the gas flowing out of the exhaust cavity can enter the exhaust runner 11, the through exhaust design is adopted to form axial exhaust, the roundabout of an airflow path is reduced, the exhaust pressure loss can be reduced, the exhaust is directly reduced in noise, the noise reduction efficiency is improved, and further noise is avoided; simultaneously, the exhaust flow rate can be controlled in an accurate and proper range, so that the compressor energy efficiency is improved; in addition, the oil drops can be discharged more smoothly along with the airflow.

In some embodiments, as shown in FIG. 2, the exhaust runner 11 extends in a straight line.

The embodiment forms a straight-through flow passage design, reduces the detour of an airflow path, can reduce the pressure loss of the exhaust gas in the process of flowing in the exhaust flow passage 11, can control the flow speed of the exhaust gas in an accurate and proper range, and improves the energy efficiency of the compressor; in addition, the oil drops can be discharged more smoothly along with the airflow.

Further, in the embodiment in which the main body extending direction of the exhaust flow path 11 coincides with the exhaust chamber and the exhaust flow path 11 extends in a straight line, the detour of the air flow path can be minimized, and the pressure loss during the flow of the exhaust gas in the exhaust flow path 11 can be reduced.

In some embodiments, the exhaust runner 11 is provided with a damping chamber 2 on an inner side wall, and the damping chamber 2 communicates with the exhaust runner 11. For example, the attenuation chamber 2 may have a polygonal shape such as a rectangle, a circular shape, an elliptical shape, or the like.

The embodiment can enable gas to enter the damping cavity 2 in the process of flowing along the exhaust runner 11 to absorb air flow pulsation, so that vibration noise generated when the compressor works is reduced, the damping cavity 2 plays a main role in damping, and the gas finally flows back to the exhaust runner 11 after entering the damping cavity 2.

In some embodiments, as shown in fig. 2, the attenuation chambers 2 are provided in plural at intervals along the extending direction of the exhaust flow passage 11. For example, the shape or size of the plurality of attenuation chambers 2 may be the same or different, the number of attenuation chambers 2 may be determined according to the noise frequency band required to be attenuated by the compressor, the number of attenuation chambers 2 may be flexibly increased or decreased, when the noise frequency band required to be reduced is relatively large, the noise reduction pressure ratio is relatively large, and the number of attenuation chambers 2 may be increased, and four attenuation chambers 2 are disposed on a single side in fig. 2.

In the process of enabling the gas to flow in the exhaust runner 11, the embodiment can gradually reduce noise through the attenuation cavities 2 which are sequentially arranged, so that each attenuation cavity 2 can be fully utilized, and a better vibration reduction effect can be obtained.

In some embodiments, as shown in FIG. 1, the attenuation chamber 2 is disposed to the left and/or right of the exhaust runner 11. The damping cavities 2 are simultaneously arranged on the left side and the right side of the exhaust runner 11, so that noise can be reduced to the maximum extent, and the noise damping effect on the left side and the right side of the exhaust runner 11 is more uniform.

In this embodiment, the damping chamber 2 is disposed on the side of the exhaust runner 11, so that the oil in the exhaust gas can be collected at the bottom of the exhaust runner 11, and flows out along with the exhaust runner 11, so that the problem of oil stored in the damping chamber 2 can be solved, and the oil can be circulated into the compressor more smoothly.

In some embodiments, as shown in fig. 1, the inner sidewall of the second housing 1 is provided with a set of attenuation chambers 2 on the left and right sides of the exhaust flow channel 11, respectively, and each set of attenuation chambers 2 includes a plurality of attenuation chambers 2 arranged at intervals along the extending direction of the exhaust flow channel 11.

In the process of enabling the gas to flow in the exhaust runner 11, the embodiment can reduce noise step by step through the attenuation cavities 2 which are sequentially arranged on the left side and the right side, so that each attenuation cavity 2 can be fully utilized, and a better vibration reduction effect can be obtained. In addition, the damping cavities 2 are simultaneously arranged on the left side and the right side of the exhaust runner 11, so that noise can be reduced to the maximum extent, and the noise damping effect on the left side and the right side of the exhaust runner 11 is more uniform.

In some embodiments, as shown in fig. 1 and 4, the noise reduction assembly 10 further includes a noise reduction plate 3 mounted on the inner sidewall of the second housing 1, and the noise reduction plate 3 is provided with a through hole 31, and the exhaust runner 11 communicates with the attenuation chamber 2 through the through hole 31. For example, the perforations 31 may be provided in a plurality of numbers, and the perforations 31 may be provided in a polygonal shape such as a circle, an ellipse, a triangle, a rectangle, or the like.

According to the embodiment, the gas in the exhaust runner 11 can enter the attenuation cavity 2 through the through holes 31, and then returns to the exhaust runner 11 from the attenuation cavity 2, so that noise in a larger frequency range can be attenuated by further assisting in noise reduction through the noise reduction plate 3 on the basis of noise reduction through the attenuation cavity 2, and the noise reduction effect is optimized.

In some embodiments, the noise reduction plate 3 is provided with a through hole 32, the through hole 32 corresponds to the position of the attenuation chamber 2, and the through hole 32 is used for enabling the air flow in the exhaust runner 11 to directly enter the attenuation chamber 2. The through hole 32 has a size larger than the through hole 31, and the through hole 32 may have a shape identical to the attenuation chamber 2, but the through hole 32 has a size smaller than the attenuation chamber 2, so that the through hole 31 is provided at a position on the noise reduction plate 3 at the outer periphery of the through hole 32.

In this embodiment, through holes 32 are formed in the noise reduction plate 3, so that the air flow in the exhaust runner 11 can freely enter and exit the attenuation chamber 2, and the efficiency of noise reduction on the exhaust gas can be improved.

In some embodiments, the noise reduction plate 3 is detachably mounted to the second housing 1. For example, the noise reduction plate 3 may be detachably mounted to the inner side wall of the second housing 1 by a fastener.

In this embodiment, the noise reduction plate 3 is detachably formed, so that the through holes 31 and the through holes 32 on the noise reduction plate 3 can be conveniently machined, and the matched noise reduction plate 3 can be conveniently designed according to the working condition of the compressor, when the specification of the noise reduction assembly 10 needs to be changed, only the noise reduction plate 3 needs to be replaced independently, and the second housing 1 and the noise reduction plate 3 do not need to be integrally reworked, so that the noise reduction assembly 10 can be more flexibly adapted to the noise reduction requirement of the compressor. Moreover, if a small amount of oil remains in the attenuation chamber 2, it is also convenient to remove the noise reduction plate 3 to pour out the oil.

Alternatively, the second housing 1 and the noise reduction plate 3 may be integrally formed, for example, by casting, so as to reduce the process links during processing.

In some embodiments, the noise reduction assembly 10 includes a plurality of noise reduction plates 3, the plurality of noise reduction plates 3 having different numbers of perforations 31 and/or arrangements of perforations 31, the noise reduction plates 3 being selectively mounted within the second housing 1 depending on the operating conditions of the compressor.

The number and the aperture of the perforations 31 of the noise reduction plates 3 are determined according to the frequency band of noise to be attenuated by the compressor, and the best matched noise reduction plates 3 can be selectively installed according to different models of the compressor through the plurality of noise reduction plates 3 with different specifications provided in advance, or the noise reduction plates 3 matched with the working conditions can be selectively installed under different working conditions for the same compressor so as to reduce noise of more frequency bands, and noise reduction under different rotating speeds and working conditions is adapted.

In some embodiments, the penetration rate T on the noise reduction plate 3 is calculated by the following formula:

wherein L is the total length of the exhaust runner 11; d is the thickness of the noise reduction plate 3; r is the radius of the perforation 31; fr is the natural frequency of the attenuation chamber 2; c ₀ Is the speed of sound of the fluid in the exhaust runner 11.

According to the embodiment, the frequency range of exhaust noise to be attenuated can be determined according to the rotation speeds, working conditions, natural frequencies and the like of different polarities of the compressors, so that the number and the aperture of the perforations 31 on the noise reduction plate 3 are determined, the size of the attenuation cavity 2 and the layout of the perforations 31 on the noise reduction plate 3 are changed for noise reduction of a specific frequency range, and different noise reduction effects can be obtained to realize noise reduction according to requirements.

In some embodiments, as shown in fig. 1, an exhaust bearing seat cavity 12 is further provided in the second housing 1, where the exhaust bearing seat cavity 12 is located at the top of the exhaust runner 11 and is in communication with the exhaust runner 11, and the length of the exhaust runner 11 is greater than the length of the exhaust bearing seat cavity 12.

Taking a compressor as a screw compressor for example, the end part of the rotor can extend into the exhaust bearing seat cavity 12, the exhaust bearing seat cavity 12 is communicated with the exhaust runner 11, and the shape of the end part of the formed integral cavity is matched with that of the end part of the exhaust cavity, so that gas in the exhaust cavity smoothly enters the second shell 1. As shown in fig. 2, the stepped position formed by the exhaust bearing housing cavity 12 and the exhaust runner 11 is provided with a triangular transition connection portion 14, so that the strength of the second housing 1 can be increased.

In this embodiment, by providing the exhaust bearing housing cavity 12 in the second housing 1, the rotor occupies a part of the space in the noise reduction assembly 10, so that the structure of the compressor is more compact, and the axial dimension of the compressor is reduced as much as possible. In addition, the length of the exhaust runner 11 is longer than that of the exhaust bearing seat cavity 12, so that a longer path for noise reduction is provided after the gas enters the exhaust runner 11, and the noise reduction effect is optimized.

In some embodiments, as shown in fig. 1, an attenuation chamber 2 is disposed on an inner side wall of the exhaust runner 11 adjacent to the exhaust bearing seat chamber 12, the attenuation chamber 2 is communicated with the exhaust runner 11, and the inner side wall of the attenuation chamber 2 is provided with an inclined surface, and the inclined surface gradually approaches to a central position of the exhaust runner 11 along the width direction from top to bottom. For example, the exhaust flow passage 11 may have an inverted trapezoid shape, and the attenuation chambers 2 are provided on both sides of the trapezoid-shaped chamber.

This embodiment allows for the exhaust bearing housing cavity 12 to be larger in size than the exhaust runner 11, and by providing the side surface of the exhaust runner 11 as an inclined surface, the transition can be structurally achieved; the damping cavity 2 is arranged on the side surface of the exhaust runner 11, so that the air flow in the exhaust bearing seat cavity 12 can be guided to enter the exhaust runner 11 for noise reduction; in addition, by providing the inclined surface, the surface widths of the attenuation chamber 2 and the noise reduction plate 3 can be increased, thereby increasing the area for noise reduction of the air flow, and optimizing the noise reduction effect in the case where the outer size of the second housing 1 is fixed.

In some embodiments, as shown in fig. 1 and 3, the inner side wall of the second housing 1 is provided with a blocking portion 4 at a position where the exhaust bearing housing cavity 12 and the exhaust runner 11 meet, and the blocking portion 4 coincides with the extending direction of the exhaust runner 11.

In this embodiment, the blocking part 4 is provided, so that the gas entering the exhaust bearing seat cavity 12 from the exhaust runner 11 can be reduced, the influence of the air flow pulsation of the exhaust on the rotor is reduced, and the working reliability of the compressor is improved.

In some embodiments, the compressor is a screw compressor. Because the compression cavity and the air suction and exhaust cavity are periodically communicated in the operation process of the screw compressor, unstable air flow can be caused, and air flow pulsation of the air suction and exhaust cavity is caused, so that vibration noise in the air suction and exhaust cavity is emphasized, and the noise reduction assembly 10 matched with the working condition of the screw compressor can be flexibly configured by arranging the noise reduction assembly 10 disclosed by the invention, so that the noise reduction effect is optimized.

The foregoing is illustrative of the present disclosure and is not to be construed as limiting thereof, but rather as various modifications, equivalent arrangements, improvements, etc., which are within the spirit and principles of the present disclosure.

Claims

1. A compressor, comprising:

the noise reduction assembly (10) is used for reducing noise of gas exhausted by the first exhaust port, the noise reduction assembly (10) comprises a second shell (1), the second shell (1) is provided with an exhaust runner (11), an air inlet (111) and a second exhaust port (112), the air inlet (111) and the second exhaust port (112) are respectively positioned at two ends of the exhaust runner (11), one end, close to the air inlet (111), of the second shell (1) is detachably connected to one end, close to the first exhaust port, of the first shell, and the air inlet (111) is communicated with the first exhaust port, and the second exhaust port (112) is used for exhausting the noise-reduced gas.

2. Compressor according to claim 1, characterized in that the main body of the discharge channel (11) extends in a direction coinciding with the discharge chamber.

3. Compressor according to claim 1, characterized in that the discharge flow channel (11) extends in a straight line.

4. Compressor according to claim 1, characterized in that the inner side wall of the discharge channel (11) is provided with a damping chamber (2), the damping chamber (2) being in communication with the discharge channel (11).

5. The compressor according to claim 4, wherein the attenuation chambers (2) are provided in plural at intervals along the extending direction of the discharge flow passage (11).

6. Compressor according to claim 4, characterized in that the damping chamber (2) is provided on the left and/or right side of the discharge channel (11).

7. The compressor according to claim 6, wherein the inner side wall of the second housing (1) is provided with a set of the attenuation chambers (2) on the left and right sides of the discharge flow passage (11), respectively, each set of the attenuation chambers (2) including a plurality of the attenuation chambers (2) arranged at intervals along the extending direction of the discharge flow passage (11).

8. The compressor of claim 4, wherein the noise reduction assembly (10) further comprises a noise reduction plate (3) mounted on an inner side wall of the second housing (1), a through hole (31) is formed in the noise reduction plate (3), and the exhaust runner (11) is communicated with the attenuation chamber (2) through the through hole (31).

9. Compressor according to claim 8, characterized in that the noise reduction plate (3) is provided with a through hole (32), the through hole (32) corresponds to the position of the attenuation chamber (2), and the through hole (32) is used for enabling the air flow in the exhaust runner (11) to directly enter the attenuation chamber (2).

10. Compressor according to claim 8, characterized in that the noise reduction plate (3) is detachably mounted to the second housing (1).

11. The compressor according to claim 10, wherein the noise reduction assembly (10) comprises a plurality of the noise reduction plates (3), the plurality of noise reduction plates (3) having different numbers of perforations (31) and/or arrangements of perforations (31), the noise reduction plates (3) being selectively mounted within the second housing (1) depending on the operating conditions of the compressor.

12. Compressor according to claim 8, characterized in that the penetration rate T on the noise reduction plate (3) is calculated by the following formula:

wherein L is the total length of the exhaust runner (11); d is the thickness of the noise reduction plate (3); r is the radius of the perforation (31); fr is the natural frequency of the attenuation chamber (2); c ₀ Is the speed of sound of the fluid in the exhaust runner (11).

13. The compressor according to claim 1, wherein an exhaust bearing seat cavity (12) is further provided in the second housing (1), the exhaust bearing seat cavity (12) is located at the top of the exhaust runner (11) and is communicated with the exhaust runner (11), and the length of the exhaust runner (11) is greater than the length of the exhaust bearing seat cavity (12).

14. The compressor of claim 13, wherein an attenuation chamber (2) is provided on an inner side wall of the exhaust runner (11) adjacent to the exhaust bearing seat chamber (12), the attenuation chamber (2) is communicated with the exhaust runner (11), and an inner side wall of the attenuation chamber (2) is provided to form an inclined surface, and the inclined surface gradually approaches to a central position of the exhaust runner (11) along a width direction from top to bottom.

15. The compressor according to claim 13, wherein the second housing (1) has a blocking portion (4) at a position where the exhaust bearing housing chamber (12) and the exhaust runner (11) meet, and the blocking portion (4) is aligned with an extending direction of the exhaust runner (11).

16. The compressor according to any one of claims 1 to 15, wherein the compressor is a screw compressor.