CN212717075U - Air compressor silencer and silencing system - Google Patents

Abstract

The utility model provides an air compressor machine silencer and noise elimination system, air compressor machine silencer be provided with off-load mouth and dust exhaust mouth including having the shell that holds the chamber on the shell, and off-load mouth and dust exhaust mouth all with hold the chamber intercommunication to let in high-pressure gas to holding the intracavity through the off-load mouth, and will hold the impurity discharge of intracavity through the dust exhaust mouth. Through using this air compressor machine silencer in order to solve the inside clean inconvenient problem of silencer of the air compressor machine among the prior art.

Description

Air compressor silencer and silencing system

Technical Field

The utility model relates to a noise elimination equipment technical field particularly, relates to an air compressor machine silencer and noise elimination system.

Background

An air compressor is a device for compressing gas for inflating a vehicle gas tank.

Because the air compressor machine can produce the noise at the in-process of work, consequently can install the silencer at the air inlet department of air compressor machine usually to eliminate the noise that the air compressor machine air inlet process produced.

However, with the long-term use of the air compressor silencer, impurities such as dust, water and the like are accumulated in the air compressor silencer; the accumulated impurities can affect the volume of the accommodating cavity of the muffler, and the volume of the accommodating cavity of the muffler can affect the sound-absorbing effect.

However, the air compressor silencer in the prior art does not have the automatic cleaning function, so that the cleaning work inside the air compressor silencer is inconvenient, and the cleanliness inside the air compressor silencer is difficult to be well ensured.

SUMMERY OF THE UTILITY MODEL

A primary object of the utility model is to provide an air compressor machine silencer and noise elimination system to solve the inside clean inconvenient problem of silencer of the air compressor machine among the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided a muffler for an air compressor, including a housing having a receiving chamber; the shell is provided with an unloading port and a dust discharging port, and the unloading port and the dust discharging port are communicated with the accommodating cavity so as to introduce high-pressure gas into the accommodating cavity through the unloading port and discharge impurities in the accommodating cavity through the dust discharging port.

Furthermore, the air compressor silencer also comprises a silencing shell, at least part of the silencing shell is positioned in the accommodating cavity, and the silencing shell is provided with a channel air inlet used for being connected with the air filter and a channel air outlet used for being connected with the air compressor; wherein, the silencing shell is internally provided with a gas channel, and the channel gas inlet and the channel gas outlet are communicated with the gas channel.

Further, along the flowing direction of the gas, the shell is provided with a first opening and a second opening which are oppositely arranged, and the first opening and the second opening are respectively connected with an air filter and an air compressor; the noise elimination casing is responsible for including the intercommunication, and two pipe portion ports that the intercommunication was responsible for dock with first opening and second opening respectively.

Further, the air compressor silencer still includes: the first connecting pipe is positioned between the first opening and the air filter, one end of the first connecting pipe is butted with the first opening, and the other end of the first connecting pipe forms a channel air inlet; and/or the second connecting pipe is positioned between the second opening and the air compressor, one end of the second connecting pipe is in butt joint with the second opening, and the other end of the second connecting pipe forms a channel air outlet.

Furthermore, a plurality of silencing holes communicated with the gas channel are formed in the silencing shell, the plurality of silencing holes are divided into a plurality of groups, the plurality of groups of silencing holes are arranged at intervals along the extending direction of the gas channel, and the plurality of silencing holes of each group of silencing holes are arranged at intervals along the circumferential direction of the gas channel.

Further, the gas channel comprises a first channel section, the channel part of the gas channel, which is positioned in the accommodating cavity, is the first channel section, and the first channel section is in a strip shape; the multiple groups of silencing holes are all positioned in the first channel section; one group of the silencing holes close to the air outlet of the channel is positioned in the middle of the first channel section; and/or the distance between one group of the silencing holes close to the channel air inlet and the first end of the first channel section is equal to one third of the length of the first channel section; the first end of the first channel section is the end of the first channel section that is close to the end of the channel inlet.

Furthermore, the unloading port and the dust discharging port are oppositely arranged; and/or the unloading port is arranged upwards; and/or the dust exhaust port is arranged downwards.

Further, the air compressor silencer still includes: the shell is also provided with a third opening, one end of the third connecting pipe is butted with the third opening, and a port at the other end of the third connecting pipe forms an unloading port; and/or the shell is also provided with a fourth opening, the first end of the fourth connecting pipe is butted with the fourth opening, and a dust exhaust port is formed at the port of the second end of the fourth connecting pipe.

Furthermore, the fourth connecting pipe comprises a first pipe section, a second pipe section and a third pipe section which are sequentially connected, one end of the first pipe section, which is far away from the second pipe section, is butted with the fourth opening, and a port of one end of the third pipe section, which is far away from the second pipe section, forms a dust exhaust port; wherein, from the direction of first pipeline section to third pipeline section, the pipe diameter of second pipeline section reduces gradually.

Further, at least part of the fourth connecting pipe is made of a flexible material; when negative pressure exists in the accommodating cavity, the inner wall of the second end of the fourth connecting pipe is attached to enable the port of the second end of the fourth connecting pipe to be in a closed state; when high-pressure gas is introduced into the accommodating cavity, the inner wall of the second end of the fourth connecting pipe is separated so that the port of the second end of the fourth connecting pipe is in an open state.

According to the utility model discloses an on the other hand provides a noise elimination system, including air cleaner, air compressor machine silencer and the air compressor machine that connects gradually, this air compressor machine silencer is foretell air compressor machine silencer.

Further, the silencing system also comprises a gas tank, wherein the gas tank is connected with the air compressor so that high-pressure gas compressed by the air compressor enters the gas tank; the air tank is communicated with an unloading port of the air compressor silencer, so that when the pressure in the air tank is greater than or equal to the preset pressure, high-pressure air is introduced into the accommodating cavity through the unloading port.

Use the technical scheme of the utility model, air compressor machine silencer including having the shell that holds the chamber, set up all with the off-load mouth and the dust exhaust mouth that hold the chamber intercommunication on the shell, let in high-pressure gas in order to sweep to holding the intracavity through the off-load mouth, make the impurity that holds the intracavity discharge through the dust exhaust mouth under high-pressure gas's the effect of sweeping, and then realize the cleanness to holding intracavity portion. The volume of the accommodating cavity can be prevented from being reduced due to the accumulation of impurities in the accommodating cavity by cleaning the inside of the accommodating cavity, so that the noise elimination effect of the silencer of the air compressor is further influenced; use this air compressor machine silencer promptly can guarantee the noise elimination effect of air compressor machine silencer through guaranteeing to holding the inside cleanness in chamber. Therefore, the air compressor silencer has an automatic cleaning function, and the problem that the interior of the air compressor silencer is inconvenient to clean in the prior art can be solved.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows an external structural view of an embodiment of an air compressor muffler according to the present invention;

fig. 2 is a schematic view showing an internal structure of a muffler of the air compressor of fig. 1;

FIG. 3 is a schematic view showing the arrangement of the silencing holes on the communicating main pipe of the silencer of the air compressor in FIG. 1;

fig. 4 shows a schematic structural view of a sound damping system according to the present invention.

Wherein the figures include the following reference numerals:

100. an air compressor silencer;

10. a housing; 11. an accommodating chamber; 12. a housing cover;

20. the main pipe is communicated; 21. a gas channel; 211. a sound-deadening aperture;

30. a first connecting pipe; 40. a second connecting pipe;

50. a third connecting pipe; 51. an unloading port;

60. a fourth connecting pipe; 61. a first tube section; 62. a second tube section; 63. a third tube section; 64. a dust exhaust port;

70. a sound-deadening housing;

210. an air cleaner; 220. an air compressor; 230. a gas tank.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.

The utility model provides an air compressor silencer 100, please refer to fig. 1 to 4, the air compressor silencer 100 includes a housing 10, the housing 10 has a containing cavity 11; the housing 10 is provided with an unloading port 51 and a dust discharging port 64, and both the unloading port 51 and the dust discharging port 64 are communicated with the accommodating cavity 11, so that high-pressure gas is introduced into the accommodating cavity 11 through the unloading port 51, and impurities in the accommodating cavity 11 are discharged through the dust discharging port 64.

The utility model discloses an among air compressor silencer 100, air compressor silencer 100 sets up all and off-load mouth 51 and the dust exhaust mouth 64 that hold chamber 11 intercommunication including having the shell 10 that holds chamber 11 on shell 10, lets in high-pressure gas in order to sweep in holding chamber 11 through off-load mouth 51, makes the impurity that holds in the chamber 11 sweep the effect through dust exhaust mouth 64 discharge under high-pressure gas, and then realizes holding the inside cleanness in chamber 11. The cleaning of the inside of the accommodating cavity 11 can avoid the reduction of the volume of the accommodating cavity 11 caused by the accumulation of impurities in the accommodating cavity 11, and further influence on the silencing effect of the silencer of the air compressor; namely, the air compressor silencer 100 can ensure the silencing effect of the air compressor silencer by ensuring the cleanness of the inside of the accommodating cavity 11. It can be seen that, this possesses the self-cleaning function in the air compressor machine silencer 100, it can solve the inside inconvenient problem of cleanness of air compressor machine's among the prior art silencer.

Specifically, the air compressor silencer 100 further includes a silencing case 70, at least a portion of the silencing case 70 is located in the accommodating chamber 11, the silencing case 70 has a channel air inlet for connection with the air cleaner 210 and a channel air outlet for connection with the air compressor 220, so that at least a portion of the gas flowing out from the air cleaner 210 enters the silencing case 70 through the channel air inlet to perform silencing treatment in the silencing case 70, and the gas subjected to silencing treatment flows out through the channel air outlet and enters the air compressor 220.

It should be noted that, the cleaning operation of the air compressor muffler 100 to the inside of the accommodating cavity 11 does not affect the normal sound elimination operation thereof, that is, the inside of the accommodating cavity 11 can be cleaned when the air compressor muffler 100 performs the normal sound elimination operation.

Specifically, the sound attenuation housing 70 has a gas passage 21 therein, and both the passage inlet and the passage outlet communicate with the gas passage 21, so that the gas passing through the passage inlet enters the gas passage 21 and the sound attenuation treatment is achieved in the gas passage 21.

In the present embodiment, regarding the specific structure of the sound-deadening housing 70, as shown in fig. 2, the housing 10 has a first opening and a second opening that are disposed opposite to each other in the flow direction of the gas, and the first opening and the second opening are connected to the air cleaner 210 and the air compressor 220, respectively; the muffler case 70 includes a communication main pipe 20, and two pipe portion ports of the communication main pipe 20 are butted against the first opening and the second opening, respectively. Wherein the lumen communicating with the main tube 20 is used to form the gas passage 21. The utility model provides a form that sets up of the main pipe 20 of intercommunication has reduced the air compressor machine admission loss that causes because of high-pressure gas's sweeping furthest, also can guarantee the air input of air compressor machine when cleaning operation to holding chamber 11 inside.

Specifically, the air compressor silencer 100 further includes a first connection pipe 30, the first connection pipe 30 is located between the first opening and the air cleaner 210, one end of the first connection pipe 30 is butted against the first opening, and the other end of the first connection pipe 30 forms a channel air inlet. Wherein the lumen of the first connecting tube 30 is used to form the gas passage 21.

Specifically, the air compressor silencer 100 further includes a second connection pipe 40, the second connection pipe 40 is located between the second opening and the air compressor 220, one end of the second connection pipe 40 is butted with the second opening, and the other end of the second connection pipe 40 forms a channel air outlet. Wherein, the lumen of the second connecting pipe 40 is used for forming the gas channel 21, i.e. the lumen of the first connecting pipe 30, the lumen of the communicating main pipe 20, and the lumen of the second connecting pipe 40 are communicated in sequence to form the gas channel 21.

Optionally, the pipe center line of the first connecting pipe 30 coincides with the pipe center line of the communicating main pipe 20; the tube axis of the communication main tube 20 coincides with the tube axis of the second connection tube 40.

Alternatively, the communication main pipe 20 and the second connection pipe 40 are integrally formed.

Optionally, the housing 10 includes a housing main body and a housing cover 12, and the housing main body and the housing cover 12 jointly enclose the accommodating cavity 11; a pipe body integrally formed by the communication main pipe 20 and the second connection pipe 40 is inserted into the case cover 12.

In this embodiment, the muffling housing 70 is provided with a plurality of muffling holes 211 communicated with the gas channel 21, so as to perform muffling treatment of the gas in the gas channel 21. Specifically, a plurality of the muffling holes 211 are each provided on the pipe wall of the communication main pipe 20.

Alternatively, as shown in fig. 2 and 3, the plurality of muffling holes 211 are divided into a plurality of groups, and the plurality of groups of muffling holes 211 are arranged at intervals along the extending direction of the gas channel 21, that is, the plurality of groups of muffling holes 211 are arranged at intervals along the extending direction of the communicating main pipe 20; the plurality of muffling holes 211 of each set of muffling holes 211 are arranged at intervals in the circumferential direction of the gas channel 21, that is, the plurality of muffling holes 211 of each set of muffling holes 211 are arranged at intervals in the circumferential direction of the communicating main pipe 20. In the present embodiment, four sets of the sound-deadening holes 211 are provided in the communication main pipe 20.

Specifically, the gas passage 21 includes a first passage section, the passage portion of the gas passage 21 located in the accommodating chamber 11 is the first passage section, and the plurality of sets of muffling holes 211 are all located in the first passage section.

Optionally, the first channel section is strip-shaped, i.e. the lumen of the communicating main tube 20 forms the first channel section.

Preferably, one of the plurality of sets of muffling holes 211 near the outlet of the channel is located in the middle of the first channel segment to achieve the optimal muffling effect.

Preferably, the distance between one of the plurality of sets of muffling holes 211 close to the inlet of the channel and the first end of the first channel segment is equal to one third of the length of the first channel segment, so as to achieve the optimal muffling effect. The length of the first channel section is the length of the first channel section along the extending direction of the first channel section; the first end of the first channel section is the end of the first channel section that is close to the end of the channel inlet.

It should be noted that the "distance between the group of the plurality of groups of the muffling holes 211 close to the channel air inlet and the first end of the first channel section" is specifically a horizontal distance between the center of the group of the muffling holes 211 close to the channel air inlet and the first end of the first channel section.

In the present embodiment, the unloading port 51 and the dust discharge port 64 are disposed opposite to each other to facilitate discharge of the foreign substances in the accommodating chamber 11.

Alternatively, the relief port 51 is provided upward; the dust discharge port 64 is disposed downward.

Optionally, the unloading port 51 and the dust discharging port 64 are both located at a side of the plurality of muffling holes 211 close to the channel air outlet.

Specifically, the air compressor silencer 100 further includes a third connection pipe 50, and the casing 10 further has a third opening, one end of the third connection pipe 50 is butted against the third opening, and a port at the other end of the third connection pipe 50 forms an unloading port 51.

Specifically, air compressor silencer 100 further includes a fourth connection pipe 60, and outer shell 10 further has a fourth opening, a first end of fourth connection pipe 60 is butted against the fourth opening, and a port of a second end of fourth connection pipe 60 forms dust exhaust port 64.

Specifically, regarding the specific structure of the fourth connecting pipe 60, the fourth connecting pipe 60 includes a first pipe section 61, a second pipe section 62 and a third pipe section 63 which are connected in sequence, an end of the first pipe section 61 away from the second pipe section 62 is butted with a fourth opening, and a port of an end of the third pipe section 63 away from the second pipe section 62 forms a dust exhaust port 64; wherein, the pipe diameter of the second pipe section 62 gradually decreases from the first pipe section 61 to the third pipe section 63.

Optionally, at least a portion of the fourth connection pipe 60 is made of a flexible material, so that at least a portion of the fourth connection pipe 60 is easily deformed by an external force. Preferably, the flexible material is rubber. In particular, the second and third tube sections 62, 63 are made of a flexible material.

When the air compressor silencer 100 performs normal silencing work, the air compressor performs air suction action on the silencing shell 70, so that the accommodating cavity 11 forms negative pressure. When negative pressure is applied to the accommodating chamber 11, the inner wall of the second end of the fourth connecting pipe 60 is attached to make the port of the second end of the fourth connecting pipe 60 in a closed state, that is, when the air compressor muffler 100 performs normal muffling operation and does not perform cleaning operation, at least part of the inner walls of the second pipe section 62 and the third pipe section 63 are attached to each other, and the dust exhaust port 64 is in a closed state.

When high-pressure gas is introduced into the accommodating cavity 11, the inner wall of the second end of the fourth connecting pipe 60 is separated to open the port of the second end of the fourth connecting pipe 60, that is, when the air compressor muffler 100 performs a cleaning operation, the inner walls of the second pipe section 62 and the third pipe section 63 are separated under the blowing force of the high-pressure gas, the dust exhaust port 64 is in an open state, and impurities in the accommodating cavity 11 can be exhausted through the dust exhaust port 64.

The utility model also provides a noise elimination system, as shown in FIG. 4, it includes air cleaner 210, foretell air compressor machine silencer 100 and air compressor machine 220, and air cleaner 210, air compressor machine silencer 100 and air compressor machine 220 connect gradually.

The muffling system further comprises a gas tank 230, wherein the gas tank 230 is connected with the air compressor 220, so that high-pressure gas compressed by the air compressor 220 enters the gas tank 230 for braking the vehicle.

The gas tank 230 communicates with the relief port 51 of the air compressor muffler 100 so that when the pressure in the gas tank 230 is greater than or equal to a predetermined pressure, the gas tank 230 introduces high-pressure gas into the accommodation chamber 11 through the relief port 51.

It should be noted that the predetermined pressure may be set according to actual conditions, so as to influence the number of cleaning cycles of the accommodating chamber 11 by setting different predetermined pressures.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects:

the utility model discloses an among air compressor silencer 100, air compressor silencer 100 sets up all and off-load mouth 51 and the dust exhaust mouth 64 that hold chamber 11 intercommunication including having the shell 10 that holds chamber 11 on shell 10, lets in high-pressure gas in order to sweep in holding chamber 11 through off-load mouth 51, makes the impurity that holds in the chamber 11 sweep the effect through dust exhaust mouth 64 discharge under high-pressure gas, and then realizes holding the inside cleanness in chamber 11. The cleaning of the inside of the accommodating cavity 11 can avoid the reduction of the volume of the accommodating cavity 11 caused by the accumulation of impurities in the accommodating cavity 11, and further influence on the silencing effect of the silencer of the air compressor; namely, the air compressor silencer 100 can ensure the silencing effect of the air compressor silencer by ensuring the cleanness of the inside of the accommodating cavity 11. It can be seen that, this possesses the self-cleaning function in the air compressor machine silencer 100, it can solve the inside inconvenient problem of cleanness of air compressor machine's among the prior art silencer.

The utility model discloses a noise elimination system includes foretell air compressor machine silencer 100, consequently, this noise elimination system has the same technological effect with air compressor machine silencer 100 at least.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are, for example, capable of operation in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (12)

1. The utility model provides an air compressor machine silencer which characterized in that includes:

a housing (10), the housing (10) having a receiving cavity (11); the shell (10) is provided with an unloading port (51) and a dust discharging port (64), the unloading port (51) and the dust discharging port (64) are communicated with the accommodating cavity (11), so that high-pressure gas is introduced into the accommodating cavity (11) through the unloading port (51), and impurities in the accommodating cavity (11) are discharged through the dust discharging port (64).

2. The air compressor muffler according to claim 1, further comprising:

a sound-damping housing (70), at least part of the sound-damping housing (70) being located in the accommodation chamber (11), the sound-damping housing (70) having a channel inlet for connection to an air filter (210) and a channel outlet for connection to an air compressor (220);

wherein, the silencing shell (70) is internally provided with a gas channel (21), and the channel gas inlet and the channel gas outlet are both communicated with the gas channel (21).

3. The air compressor muffler according to claim 2, wherein the housing (10) has a first opening and a second opening disposed opposite to each other in a flow direction of the gas, the first opening and the second opening being connected to the air cleaner (210) and the air compressor (220), respectively; the sound-deadening housing (70) includes:

a main communication pipe (20), wherein two pipe part ports of the main communication pipe (20) are respectively butted with the first opening and the second opening.

4. The air compressor muffler according to claim 3, further comprising:

a first connection pipe (30), the first connection pipe (30) being located between the first opening and the air cleaner (210), one end of the first connection pipe (30) being butted against the first opening, the other end of the first connection pipe (30) forming the channel air inlet; and/or

A second connecting pipe (40), the second connecting pipe (40) is located between the second opening and the air compressor (220), one end of the second connecting pipe (40) is butted with the second opening, and the other end of the second connecting pipe (40) forms the channel air outlet.

5. The air compressor muffler as defined in claim 2, wherein the muffler shell (70) is provided with a plurality of muffler holes (211) communicating with the air passage (21), the plurality of muffler holes (211) are divided into a plurality of groups, the plurality of groups of muffler holes (211) are arranged at intervals along an extending direction of the air passage (21), and the plurality of muffler holes (211) of each group of muffler holes (211) are arranged at intervals along a circumferential direction of the air passage (21).

6. The air compressor muffler according to claim 5, wherein the gas passage (21) includes a first passage section, a passage portion of the gas passage (21) located in the accommodation chamber (11) is the first passage section, and the first passage section is bar-shaped; the groups of the silencing holes (211) are all positioned in the first channel section;

one group of the silencing holes (211) close to the channel air outlet is positioned in the middle of the first channel section; and/or

The distance between one group of the silencing holes (211) close to the channel air inlet and the first end of the first channel section is equal to one third of the length of the first channel section; the first end of the first channel section is the end of the first channel section that is close to the end of the channel inlet.

7. The air compressor muffler as recited in claim 1, wherein said unloading port (51) and said dust discharge port (64) are disposed oppositely; and/or the unloading port (51) is arranged upwards; and/or the dust exhaust port (64) is arranged downwards.

8. The air compressor muffler according to claim 1, further comprising:

a third connecting pipe (50), wherein the shell (10) is also provided with a third opening, one end of the third connecting pipe (50) is butted with the third opening, and a port at the other end of the third connecting pipe (50) forms the unloading port (51); and/or

A fourth connection pipe (60), the housing (10) further having a fourth opening, a first end of the fourth connection pipe (60) being butted with the fourth opening, a port of a second end of the fourth connection pipe (60) forming the dust discharge port (64).

9. The air compressor silencer according to claim 8, wherein the fourth connecting pipe (60) comprises a first pipe section (61), a second pipe section (62) and a third pipe section (63) which are connected in sequence, wherein one end of the first pipe section (61) far away from the second pipe section (62) is butted with the fourth opening, and a port of one end of the third pipe section (63) far away from the second pipe section (62) forms the dust exhaust opening (64);

wherein the pipe diameter of the second pipe section (62) is gradually reduced from the first pipe section (61) to the third pipe section (63).

10. The air compressor muffler according to claim 8, wherein at least a portion of the fourth connecting pipe (60) is made of a flexible material; when negative pressure exists in the accommodating cavity (11), the inner wall of the second end of the fourth connecting pipe (60) is attached to enable the port of the second end of the fourth connecting pipe (60) to be in a closed state; when high-pressure gas is introduced into the accommodating cavity (11), the inner wall of the second end of the fourth connecting pipe (60) is separated so that the port of the second end of the fourth connecting pipe (60) is in an open state.

11. A sound attenuation system comprising an air cleaner (210), an air compressor muffler (100) and an air compressor (220) connected in sequence, characterized in that the air compressor muffler (100) is the air compressor muffler according to any one of claims 1 to 10.

12. The sound attenuation system of claim 11, further comprising:

the air tank (230) is connected with the air compressor (220), so that high-pressure air compressed by the air compressor (220) enters the air tank (230);

the air tank (230) is communicated with an unloading port (51) of the air compressor silencer (100), so that when the pressure in the air tank (230) is larger than or equal to a preset pressure, high-pressure air is introduced into the accommodating cavity (11) through the unloading port (51) by the air tank (230).

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