CN219101599U - Exhaust silencing structure and compressor - Google Patents

Abstract

The utility model relates to an exhaust silencing structure and a compressor, comprising: an exhaust end silencing seat and a plurality of silencers. The exhaust end silencing seat is internally provided with a silencing installation cavity and a silencing exhaust port communicated with the silencing installation cavity, and is also provided with a gas inlet connected with the silencing installation cavity. The silencer is provided with a plurality of silencing through holes communicated with the silencing cavities, and natural frequencies of the silencers are different. And the plurality of silencers with different natural frequencies are utilized to inhibit airflow pulsation noise with different frequencies, so that a better reduction effect is achieved on the airflow pulsation noise under the variable working conditions.

Description

Exhaust silencing structure and compressor

Technical Field

The utility model relates to the technical field of compressors, in particular to an exhaust silencing structure and a compressor.

Background

The screw compressor is operated with electromagnetic noise, mechanical vibration noise and air flow pulsation noise, wherein the mechanical vibration noise is improved with the improvement of manufacturing and assembling precision, but the air flow pulsation noise is still to be reduced.

The component for reducing the air flow pulsation noise can only reduce the air flow pulsation under specific working conditions, and the mechanism can not have a better effect of reducing the air flow pulsation noise when the variable working conditions are operated, such as the variable frequency screw compressor is operated at variable speeds.

Disclosure of Invention

Aiming at the problem of poor reduction effect of airflow pulsation noise under variable working conditions, the utility model provides an exhaust silencing structure and a compressor, which utilize a plurality of silencers with different threading rates to inhibit airflow pulsation noise with different frequencies, thereby having better reduction effect on the airflow pulsation noise under the variable working conditions.

An exhaust muffling structure comprising:

the exhaust end silencing seat is internally provided with a silencing installation cavity and a silencing exhaust port communicated with the silencing installation cavity, and is also provided with a gas inlet connected with the silencing installation cavity;

the silencer is arranged in the silencing installation cavity, each silencer is provided with a silencing shell surrounding the silencing cavity, and the silencing shell is provided with a plurality of silencing through holes communicated with the silencing cavity, and natural frequencies of the silencers are different.

In one embodiment, the volume of each of the sound attenuation chambers is different;

and/or the perforation rate of each of the silencers is different.

In one embodiment, a bearing mounting cavity for mounting the exhaust end bearing is further formed in the exhaust end silencing seat, and all silencers are arranged at intervals with the bearing mounting cavity.

In one embodiment, a plurality of the silencers are spaced apart in the silencing mounting chamber.

In one embodiment, all the silencers are cylindrical, and the center-to-center distance between two adjacent silencers is not less than 1.05 times the outer diameter of the cylinder of the silencers.

In one embodiment, a plane passing through the silencing exhaust port and perpendicular to the air inlet direction of the silencing exhaust port is a virtual projection plane, all the silencers form a silencing unit, and the projection of the silencing unit on the virtual projection plane covers the position of the silencing exhaust port.

In one embodiment, a plane passing through the silencing exhaust port and perpendicular to the air inlet direction of the silencing exhaust port is a virtual projection plane, all the silencers form a silencing unit, the silencing unit comprises a plurality of silencing layers, each silencing layer at least comprises one silencer, and the silencing layers are sequentially arranged at intervals in a direction close to the virtual projection plane.

In one embodiment, all the silencers are cylindrical, the center distance between two adjacent silencers belonging to the same silencing layer is H1, the center distance between two adjacent silencers belonging to different silencing layers is H2, and H1 is larger than H2.

In one embodiment, all of the silencers are cylindrical, the direction from the gas inlet to the silencing exhaust port is a first direction, and the axial direction of the silencers intersects the first direction.

In one embodiment, the exhaust end silencing seat comprises a first seat body and a second seat body, the first seat body is movably connected with the second seat body, so that the exhaust end silencing seat is in a closed state and an open state, the first seat body and the second seat body enclose a silencing installation cavity in the closed state, the first seat body and the second seat body are at least partially separated in the open state, an installation opening capable of taking and placing the silencer is formed, a silencing exhaust port is formed in the first seat body or the second seat body, and a gas inlet is formed in the first seat body or the second seat body.

In one embodiment, the silencing mounting cavity is a cylindrical space, the exhaust end silencing seat comprises a radial side part and an axial end part, the radial side part forms a side wall of the cylindrical space, the axial end part forms an end wall of the cylindrical space, the gas inlet is formed at one end of the radial side part, the other end of the radial side part is connected with the axial end part, and the silencing exhaust port is formed at the axial end part.

The utility model provides a compressor, includes compression portion, compressor housing and arbitrary exhaust silencing structure of the aforesaid, be equipped with accommodation space in the compressor housing, compression portion installs in the accommodation space, accommodation space has compression gas vent, compression portion with the organism encloses into compression space, compression gas vent with compression space intercommunication, exhaust end amortization seat with the compressor housing is connected, compression gas vent with exhaust end amortization seat the gas inlet counterpoint intercommunication.

In one embodiment, the exhaust end muffler seat is detachably connected to the compressor housing, and all of the silencers are detachably mounted in the muffler mounting cavity.

In one embodiment, the compressor further includes a discharge end bearing for supporting the compression portion, the discharge end bearing being fitted in the discharge end sound deadening seat.

The scheme provides an exhaust silencing structure and compressor, the high-pressure working medium after compressing in the accommodation space is followed compression gas vent is discharged into the amortization installation cavity, is based on be equipped with the muffler that a plurality of natural frequencies are different in the amortization installation cavity, so can restrain the air current pulsation noise of multiple different frequencies to play better reducing effect to the air current pulsation noise under the variable operating mode condition.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model.

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

Fig. 1 is a sectional view of a compressor according to the present embodiment;

FIG. 2 is a cross-sectional view of the exhaust end muffler seat according to the present embodiment;

fig. 3 is a schematic diagram of a helmholtz resonator.

Reference numerals illustrate:

10. a compressor; 11. a screw female rotor; 12. a screw male rotor; 13. a compression section; 20. an exhaust silencing structure; 21. a compressor housing; 211. an accommodation space; 212. a compression exhaust port; 22. an exhaust end silencing seat; 221. a sound deadening mounting cavity; 222. silencing exhaust port; 223. a radial side portion; 224. an axial end; 23. a silencing unit; 231. a muffler; 2311. a sound deadening through hole; 232. a first sound deadening layer; 233. a second sound deadening layer; 234. and a third noise reduction layer.

Detailed Description

In order that the above objects, features and advantages of the utility model will be readily understood, a more particular description of the utility model will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model. The present utility model may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the utility model, whereby the utility model is not limited to the specific embodiments disclosed below.

In this application, an exhaust silencing structure 20 is designed to improve the effect of reducing the pulsation noise of the air flow, as shown in fig. 1, in some embodiments, the exhaust silencing structure 20 is assembled to the compressor housing 21, and can be used to reduce the pulsation of the air flow of the working medium discharged from the compression exhaust port 212 of the compressor housing 21. The compressor housing 21 is provided with an accommodating space 211 for accommodating the compression part. The receiving space 211 has a compression exhaust port 212. The compression section in this application refers to a part of the compressor for compressing the working medium, such as a part of two screw rotors in the screw compressor 10 for compressing the working medium. As shown in fig. 1, the screw female rotor 11 and the screw male rotor 12 are matched with each other, and the two screw rotors and the compressor housing 21 enclose a compression space. When the screw female rotor 11 and the screw male rotor 12 rotate, the working medium is gradually extruded in the compression space, and finally the working medium with higher pressure is rapidly discharged out of the compression space from the compression exhaust port 212.

In the air conditioning field, the high pressure working fluid discharged from the compression exhaust port 212 may be delivered to a heat exchanger for heat exchange.

As shown in fig. 1 and 2, in some embodiments, the exhaust silencing structure 20 includes an exhaust end silencing seat 22 and a plurality of silencers 231.

The exhaust end silencing seat 22 is internally provided with a silencing installation cavity 221 and a silencing exhaust port 222 communicated with the silencing installation cavity 221. The exhaust end silencing seat 22 is also provided with a gas inlet connected to the silencing installation cavity 221. The exhaust end silencing seat 22 is used for being connected with the compressor housing 21, and the compressed exhaust port 212 is communicated with the gas inlet in an aligned mode when the two are connected. The high-pressure working fluid discharged from the compression exhaust port 212 enters the muffler mounting chamber 221 and is then discharged from the muffler exhaust port 222.

And a plurality of the silencers 231 are installed in the silencing installation cavity 221, and natural frequencies of the silencers 231 are different. The resonance frequencies of the respective silencers 231 are thus different, and the frequency ranges of the airflow pulsation that can be suppressed with emphasis are different.

The compression part continuously operates to compress the working medium and simultaneously sucks gas, and the sucked gas is compressed together with the working medium. When the high-pressure working medium is discharged from the compression exhaust port 212, the high-pressure air flow is instantaneously discharged from the compression exhaust port 212 at the same time, and air flow pulsation is generated. When the mixed fluid composed of the high-pressure working medium and the high-pressure gas passes through the plurality of silencers 231, each silencer 231 suppresses airflow pulsation, and the purpose of noise reduction is achieved. The natural frequencies of the plurality of silencers 231 are different, so that the pulsation frequencies which can be mainly suppressed by the different silencers 231 are different, and further, under the combined action of the plurality of silencers 231, the pulsation of the air flow with different frequencies can be suppressed, so that a higher reduction effect can be achieved even for the pulsation noise of the air flow in the running environment with variable working conditions.

Further, as shown in fig. 3, in some embodiments, each of the silencers 231 is a helmholtz resonator silencer, and the helmholtz resonator principle is used to achieve silencing and noise reduction. The Helmholtz resonator mainly comprises a short pipe (short pipe length L) and a cavity (cavity volume V), when the frequency of an incident sound wave approaches to the natural frequency in the Helmholtz cavity, a medium in the short pipe of the Helmholtz resonator generates strong vibration, and the medium overcomes friction resistance and consumes sound energy in the vibration process.

As shown in fig. 1 and 2, in some embodiments, each muffler 231 has a muffler shell enclosing a muffler cavity, and a plurality of muffler through holes 2311 are formed in the muffler shell and all communicate with the muffler cavity. The silencing through hole 2311 corresponds to a stub in the helmholtz resonator, and the silencing cavity corresponds to a cavity in the helmholtz resonator. When the environment where the muffler 231 is located vibrates and the vibration frequency is close to the natural frequency of the muffler 231, the medium in the silencing through hole 2311 can generate strong vibration, and the medium needs to overcome friction resistance in the vibration process to consume the energy of vibration sound waves, so that the effect of reducing airflow pulsation is achieved. And only a small amount of working medium in the silencing installation cavity 221 moves back and forth to the silencing through holes 2311, and the working medium forms vibration waves with different frequencies when moving back and forth to the silencing through holes 2311 of different silencers 231, so that the vibration waves can be mutually influenced with the original main vibration waves of the working medium in the silencing installation cavity 221 to be reduced, and the vibration reduction effect is achieved. Therefore, the vibration reduction method can reduce the pressure loss as much as possible by adopting the Helmholtz resonator principle.

In particular, in some embodiments, the perforation rate of each of the silencers 231 is different, which in turn results in different natural frequencies of each of the silencers 231. In other embodiments, the volume of each of the sound attenuation chambers is different, which in turn results in different natural frequencies for each of the sound attenuators 231.

As shown in fig. 1, the silencing casing is a cylindrical casing with two closed ends, and a plurality of silencing through holes 2311 are formed in the side wall of the silencing casing. The muffler shells themselves are axially aligned with the height, and in some embodiments, the height of each muffler shell is no less than the apex height of the muffler outlet 222. In other words, the vibration wave must pass through the silencing shell before being transmitted to the silencing exhaust port, and the vibration wave is restrained and reduced when passing through the silencing shell. The above-described limitation of the height of the muffler housing ensures that the pulsation noise of the air flow at the muffler exhaust port 222 is greatly reduced by the respective silencers 231.

In some embodiments, as shown in fig. 1, all of the silencers 231 are cylindrical. The direction of the interval from the gas inlet to the muffler exhaust port 222 is the first direction, in other words, the direction of the interval from the compression exhaust port 212 to the muffler exhaust port 222 is the first direction. The axial direction of the muffler 231 intersects the first direction. In particular, in one embodiment, as shown in fig. 1, the axial direction of the muffler 231 is perpendicular to the first direction. The pulsation of the air flow passes through the muffler 231 during the transfer in the first direction to the muffler outlet 222, and intersects with the first direction based on the circumferential direction of the muffler 231, so that the pulsation of the air flow having a vibration frequency in the vicinity of the natural frequency of the muffler 231 is more easily intercepted and reduced by the muffler.

Further, in some embodiments, a plane passing through the muffler exhaust port 222 and perpendicular to the intake direction of the muffler exhaust port 222 is a virtual projection plane. As shown in fig. 2, all of the silencers 231 constitute a silencing unit 23. The projection of the silencing unit 23 on the virtual projection surface covers the position where the silencing exhaust port 222 is located. The muffler unit 23 is intercepted in front of the muffler exhaust port 222, and blocks the pulsation of the air flow from being directly transmitted to the muffler exhaust port 222, so that the muffler unit 23 can reduce the pulsation noise of the air flow at the muffler exhaust port 222.

Specifically, as shown in fig. 1 and 2, the silencing unit 23 includes a plurality of silencing layers, each of which includes at least one silencer 231, and the plurality of silencing layers are sequentially spaced apart in a direction approaching the virtual projection plane.

In one embodiment, as shown in fig. 2, muffler unit 23 includes three muffler layers, the layer closest to muffler outlet 222 is third muffler layer 234, the layer furthest from muffler outlet 222 is first muffler layer 232, and the middle layer is second muffler layer 233. The first sound deadening layer 232 and the second sound deadening layer 233 each include two sound deadening devices 231 arranged side by side, and the two sound deadening devices 231 located on the same sound deadening layer are arranged at intervals. The second noise damping layer 233 includes a muffler 231. The muffler 231 included in the second muffler layer 233 corresponds to the gap between the two mufflers 231 included in the other two muffling layers.

As the airflow pulsations pass through the first sound attenuating layer 232, airflow pulsation noise around a certain frequency is attenuated. When the noise that is not reduced passes back through the second noise reduction layer 233, the second noise reduction layer 233 reduces the airflow pulsation noise around another frequency. And so on, after three silencing layers, most of noise is reduced, and finally the working medium discharged from the silencing exhaust port 222 is stable.

As shown in fig. 1 and 2, a plurality of the silencers 231 are spaced apart in the silencing mounting chamber 221. A gap between two spaced silencers 231 is followed by a silencer 231 to maximize the passage of vibration waves through at least one silencer 231. The term "downstream of a feature" as used herein refers to the side of the feature downstream of the feature in the direction of flow of the working fluid.

In particular, in one embodiment, all the silencers 231 are cylindrical, and the center-to-center distance between two adjacent silencers 231 is not less than 1.05 times the outer diameter of the cylinder of the silencers 231. Gaps are arranged between the two silencers 231 for the working medium to directly flow through, and vibration is also reduced when the working medium passes through the gaps.

The center distance between two adjacent silencers 231 belonging to the same silencing layer is H1, the center distance between two adjacent silencers 231 belonging to different silencing layers is H2, and H1 is larger than H2. The interval between two adjacent silencers 231 belonging to the same silencing layer is larger, so that the obstruction to forward flow of working medium can be reduced, and the pressure loss is reduced. And the working medium channeling is relatively less in the direction parallel to the working medium advancing direction, so that two adjacent silencers 231 in different silencing layers can be arranged more compactly, i.e. the interval between the two adjacent silencers 231 can be arranged smaller. The vibration reduction effect is guaranteed, and the kinetic energy loss of working media is reduced as much as possible. As shown in fig. 2, 5 silencers 231 are disposed in the silencing installation cavity 221, wherein the centers of 4 silencers 231 are respectively distributed at four corners in a positive direction, and the center of the remaining silencer 231 is located at the geometric center in the positive direction.

Further, in some embodiments, a bearing mounting cavity for mounting the bearing of the exhaust end is further provided in the exhaust end silencing seat 22, and all the silencers 231 are spaced from the bearing mounting cavity. It can be understood that each muffler 231 does not interfere with the bearing in the bearing mounting chamber, ensuring that the compression portion 13 can be mounted normally.

In particular, in some embodiments, the bearing mounting cavity is a space formed in the exhaust end muffler seat 22 and spaced apart from the muffler mounting cavity 221, and the bearing mounting cavity is not in communication with the muffler mounting cavity 221. Or in other embodiments, the bearing mounting cavities are part of the sound attenuation mounting cavities 221, which are located on the side of each muffler 231 near the gas inlet.

The above-mentioned noise reduction installation cavity 221 is directly formed in the exhaust end noise reduction seat 22 for installing the exhaust end bearing, and the mixed fluid can be subjected to noise reduction while being discharged from the compression exhaust port 212, so as to further improve the noise reduction effect. The exhaust end silencing seat 22 is mainly used for carrying an exhaust end bearing for supporting the compression part. The silencing mounting cavity 221 is formed on the exhaust end silencing seat 22, instead of adding a part to separately process the silencing mounting cavity 221, so that the overall structure of the exhaust silencing structure 20 is more compact.

Still further, in some embodiments, the exhaust end silencer seat 22 is removably coupled to the compressor housing 21, and all of the silencers 231 are removably mounted within the silencing mounting chamber 221. After the exhaust end muffler seat 22 is detached from the compressor housing 21, the muffler 231 in the muffler mounting chamber 221 can be replaced.

When in use, the proper silencer 231 can be selected according to the requirement, so that the natural frequency of the silencer 231 meets the noise reduction requirement. For example, the frequency range of the air flow pulsation of the mixed fluid discharged from the compression discharge port 212 is known from the frequency range of the compressor during operation, and each muffler 231 is selected according to the frequency range so that the suppression range of each muffler 231 covers the frequency range of the air flow pulsation as much as possible.

The sealing ring is arranged between the exhaust end silencing seat 22 and the compressor shell 21, so that when the exhaust end silencing seat 22 and the compressor shell 21 are connected together, the sealing performance between the two is high, and the fact that the working substance can move forward in the compression space to complete the compression process is ensured.

Alternatively, in other embodiments, the exhaust end silencing seat 22 includes a first seat body and a second seat body, where the first seat body and the second seat body are movably connected, such that the exhaust end silencing seat has a closed state and an open state. The first and second seat bodies enclose the sound attenuation mounting cavity 221 in the closed state. The first and second seat bodies are at least partially separated in the open state, forming a mounting opening into which the muffler 231 can be taken and placed. The muffler exhaust port 222 is formed in the first seat body or the second seat body, the gas inlet is formed in the first seat body or the second seat body, and all the silencers 231 are detachably mounted in the muffler mounting chamber 221.

When the muffler 231 in the muffler mounting cavity 221 needs to be replaced, the first seat body and the second seat body are switched to an open state, so that the muffler 231 is exposed; after the new muffler 231 is replaced, the first seat body and the second seat body are assembled together.

In some embodiments, the muffler mounting chamber 221 is a cylindrical space and the exhaust end muffler seat 22 is truncated by a virtual cross section through the axis of the cylindrical space to obtain the first seat body and the second seat body.

Alternatively, the first seat body and the second seat body may be partitioned in other manners, without being particularly limited herein.

Further specifically, as shown in fig. 1 and 2, in some embodiments, the exhaust end silencing seat 22 includes a radial side 223 and an axial end 224, the radial side 223 constituting a side wall of the cylindrical space, and the axial end 224 constituting an end wall of the cylindrical space. The gas inlet is formed at one end of the radial side portion 223, the other end of the radial side portion 223 is connected to the axial end portion 224, and the muffler exhaust port 222 is formed at the axial end portion 224. Here, one end and the other end of the radial side portion 223 refer to both ends in the axial direction of the cylindrical space.

The radial side portion 223 has one end connected to the compressor housing 21, and the compression discharge port 212 is located at a side of the radial side portion 223 adjacent to the compressor housing 21, and the mixed fluid discharged from the compression discharge port 212 into the muffler mounting chamber 221 passes through the plurality of silencers 231 before reaching the muffler discharge port 222.

In still other embodiments of the present application, there is provided a compressor 10, including a compression portion 13, a compressor housing 21, and the exhaust muffler structure 20 described above, the compression portion 13 is installed in the accommodating space 211, the compression portion 13 and the compressor housing 21 enclose a compression space, and the compression exhaust port 212 is in communication with the compression space.

The high-pressure working medium compressed by the compression part in the accommodating space 211 is discharged into the silencing installation cavity 221 from the compression exhaust port 212, and a plurality of silencers 231 with different penetration rates are arranged in the silencing installation cavity 221, so that airflow pulsation noise with different frequencies can be suppressed, and a better reduction effect is achieved on the airflow pulsation noise under the variable working condition.

The compression part 13 is a part of a screw rotor, two ends of the screw rotor are arranged in bearings, and the compression part 13 is positioned between the two bearings. The exhaust end silencing seat 22 is used for supporting a bearing positioned at one end of the screw rotor, namely the exhaust end bearing.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present utility model, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (14)

1. An exhaust muffler structure, comprising:

the exhaust end silencing seat is internally provided with a silencing installation cavity and a silencing exhaust port communicated with the silencing installation cavity, and is also provided with a gas inlet connected with the silencing installation cavity;

the silencer is arranged in the silencing installation cavity, each silencer is provided with a silencing shell surrounding the silencing cavity, and the silencing shell is provided with a plurality of silencing through holes communicated with the silencing cavity, and natural frequencies of the silencers are different.

2. The exhaust silencing structure according to claim 1, wherein the volume of each of the silencing chambers is different;

and/or the perforation rate of each of the silencers is different.

3. The exhaust silencing structure according to claim 1, wherein a bearing mounting cavity for mounting an exhaust end bearing is further provided in the exhaust end silencing seat, and all the silencers are arranged at intervals from the bearing mounting cavity.

4. The exhaust silencing structure according to claim 1, wherein a plurality of the silencers are arranged at intervals in the silencing installation chamber.

5. The exhaust silencing structure according to claim 4, wherein all of the silencers are cylindrical, and a center-to-center distance between two adjacent silencers is not less than 1.05 times an outer diameter of the cylinder of the silencers.

6. The exhaust muffler structure according to claim 1, wherein a plane passing through the muffler exhaust port and perpendicular to an intake direction of the muffler exhaust port is a virtual projection plane, all of the silencers constitute a muffler unit, and projection of the muffler unit on the virtual projection plane covers a position where the muffler exhaust port is located.

7. The exhaust silencing structure according to claim 1, wherein a plane passing through the silencing exhaust port and perpendicular to an intake direction of the silencing exhaust port is a virtual projection plane, all the silencers constitute a silencing unit, the silencing unit includes a plurality of silencing layers, each of the silencing layers includes at least one of the silencers, and the plurality of silencing layers are sequentially arranged at intervals in a direction approaching the virtual projection plane.

8. The exhaust silencing structure according to claim 7, wherein all of the silencers are cylindrical, a center distance between two adjacent silencers belonging to the same silencing layer is H1, and a center distance between two adjacent silencers belonging to different silencing layers is H2, and H1 is larger than H2.

9. The exhaust muffler structure as defined in claim 1, wherein all of the silencers are cylindrical, a direction from the gas inlet toward the muffler exhaust port is a first direction, and an axial direction of the silencers intersects the first direction.

10. The exhaust silencing structure according to any one of claims 1 to 9, wherein the exhaust end silencing seat comprises a first seat body and a second seat body, the first seat body and the second seat body are movably connected, so that the exhaust end silencing seat has a closed state and an open state, the first seat body and the second seat body enclose the silencing installation cavity in the closed state, the first seat body and the second seat body are at least partially separated in the open state, an installation opening capable of taking and placing the silencer is formed in the first seat body or the second seat body, the gas inlet is formed in the first seat body or the second seat body, and all the silencers are detachably installed in the silencing installation cavity.

11. The exhaust muffler structure according to any one of claims 1 to 9, wherein the muffler mounting chamber is a cylindrical space, the exhaust end muffler seat includes a radial side portion and an axial end portion, the radial side portion constitutes a side wall of the cylindrical space, the axial end portion constitutes an end wall of the cylindrical space, the gas inlet is formed at one end of the radial side portion, the other end of the radial side portion is connected to the axial end portion, and the muffler exhaust port is formed at the axial end portion.

12. The compressor, characterized by, including compression portion, compressor housing and the exhaust silencing structure of any one of claims 1 to 11, be equipped with accommodation space in the compressor housing, compression portion installs in the accommodation space, accommodation space has compression gas vent, compression portion with the compressor housing encloses into compression space, compression gas vent with compression space intercommunication, exhaust end amortization seat with the compressor housing is connected, compression gas vent with the gas inlet of exhaust end amortization seat is counterpoint intercommunication.

13. The compressor of claim 12, wherein said discharge end muffler mount is removably coupled to said compressor housing, all of said silencers being removably mounted within said muffler mounting cavity.

14. The compressor of claim 12, further comprising a discharge end bearing for supporting the compression portion, the discharge end bearing being fitted in the discharge end sound deadening seat.

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