Silencing filter and compressor

Abstract

The utility model discloses a silencing filter and a compressor, and relates to the technical field of compressors. The silencing filter comprises a silencing assembly, the silencing assembly is provided with a first air inlet channel, a first air inlet and a first air outlet, and the first air inlet communicates with the first air outlet through the first air inlet channel; the first air outlet is communicated with an air inlet of a compressor; the silencing assembly is used for silencing a working medium entering an air inlet of the compressor; the filtering assembly is arranged in the first air inlet channel, and the filtering assembly is connected with the silencing assembly; the filtering assembly is provided with a second air outlet, and the second air outlet communicates with the first air outlet; the filtering assembly is used for filtering the working medium. Thus, after the silencing assembly and the filtering assembly are integrated, the silencing filter is connected with the air inlet of the compressor, the silencing filter can conduct silencing and filtering on the working medium at the same time, and the noise reduction effect is improved while filtering is conducted.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a silencer filter and a compressor. Background Art

[0002] When the oil-free process screw compressor operates at a high speed, its rotor will generate a relatively loud noise when sweeping across the air inlet, and the noise will spread and diffuse along the process gas pipeline. In addition, in order to prevent hard particles from being sucked in through the air inlet pipeline, thereby getting stuck or damaging the rotor and the housing, a filter needs to be installed at the air inlet. At the same time, in order to prevent rust and welding slag on the air inlet pipeline from being sucked in, the filter should be installed as close to the air inlet as possible.

[0003] Therefore, currently, an intake muffler and an intake filter are usually arranged in sequence in the intake pipe along the flow direction of the process gas. However, the distance between the intake muffler and the compressor intake port is several meters to tens of meters, and the noise reduction effect is not good. Summary of the invention

[0004] An embodiment of the present application provides a silencer filter, which integrates a silencer component and a filter component to achieve the functions of silencer and filter at the same time, thereby solving the problem in the prior art that the distance between the air intake silencer and the compressor inlet is several meters to tens of meters, resulting in poor noise reduction effect; an embodiment of the present application also provides a compressor.

[0005] The embodiment of the present application provides a noise reduction filter, comprising:

[0006] A silencer assembly, the silencer assembly having a first air inlet passage, a first air inlet and a first air outlet, the first air inlet being connected to the first air outlet through the first air inlet passage; the first air outlet being connected to the air inlet of the compressor; the silencer assembly being used to silence the working fluid entering the air inlet of the compressor;

[0007] A filter assembly, wherein the filter assembly is disposed in the first air inlet passage and is connected to the silencer assembly; the filter assembly has a second air outlet, and the second air outlet is connected to the first air outlet; the filter assembly is used to filter the working medium.

[0008] In some embodiments, the sound attenuation assembly comprises:

[0009] A housing, wherein the first air inlet passage is formed inside the housing along an air inlet direction; wherein the air inlet direction is a direction from the first air inlet to the first air outlet;

[0010] a first fixing member, the first fixing member being arranged on a side of the housing facing the first air inlet passage, and forming an accommodating space between the first fixing member and the housing;

[0011] A sound absorbing part is arranged in the accommodating space.

[0012] In some embodiments, the first fixing member comprises:

[0013] A plurality of baffles, wherein the baffles are connected to a side of the housing facing the first air inlet passage, and the baffles are arranged opposite to each other along the air inlet direction;

[0014] A fixing part is connected to the partitions that are arranged opposite to each other, and the accommodating space is formed between the partitions and the shell.

[0015] In some embodiments, the first fixing member further comprises:

[0016] A plurality of support rings are provided on a side of the partition away from the sound absorbing portion, and the support rings connect the shell and the partition.

[0017] In some embodiments, the muffler assembly further comprises:

[0018] A plurality of sealing plates are arranged at two ends of the shell relatively along the air inlet direction, and the first air inlet and the first air outlet are respectively provided on the sealing plates.

[0019] In some embodiments, the muffler assembly further comprises:

[0020] A guide ring is connected to the partition plate, and the guide ring is detachably connected to the filter assembly.

[0021] In some embodiments, the filter assembly comprises:

[0022] A filter part, wherein the filter part has a second air inlet and a second air outlet arranged opposite to each other along the air inlet direction, and the second air inlet and the second air outlet are connected to form a second air inlet channel; the filter part also has a plurality of third air inlets, and the first air inlet channel and the second air inlet channel are connected through the third air inlets;

[0023] a sealing portion, the sealing portion covering the second air inlet;

[0024] A second fixing member, the filter portion is detachably connected to the silencer assembly via the second fixing member.

[0025] In some embodiments, the filter assembly further comprises:

[0026] A support rod, wherein the sealing portion and the support ring are connected via the support rod.

[0027] In some embodiments, the guide ring is provided with a guide pin;

[0028] The second fixing member is provided with a guide groove;

[0029] Wherein, the guide pin and the guide groove are cooperatively connected so that the silencer assembly and the filter assembly can be detachably connected.

[0030] In some embodiments, it also includes:

[0031] A first connecting pipe is connected to the first air inlet.

[0032] In some embodiments, it also includes:

[0033] A second connecting pipe, the second connecting pipe is connected to the first air outlet, and the second connecting pipe is connected to the air inlet of the compressor;

[0034] a liquid spraying pipe, the liquid spraying pipe being in communication with the second connecting pipe, the liquid spraying pipe having a liquid spraying end, and the liquid spraying end extending into the interior of the second connecting pipe;

[0035] Wherein, the liquid spraying end is provided with a plurality of liquid spraying through holes along the air inlet direction.

[0036] In some embodiments, the sound absorbing part is stainless steel velvet, and the density of the sound absorbing part is greater than or equal to 0.5 g / cm 3 .

[0037] Accordingly, an embodiment of the present application further provides a compressor, characterized in that it includes:

[0038] a body having a compressor air inlet;

[0039] As in any one of the above embodiments, the first air outlet of the silencer filter is connected to the air inlet of the compressor.

[0040] Compared with the prior art, a silencer filter in an embodiment of the present application includes: a silencer assembly, the silencer assembly having a first air inlet channel, a first air inlet and a first air outlet, the first air inlet being connected to the first air outlet through the first air inlet channel; the first air outlet being used to be connected to the air inlet of the compressor; the silencer assembly being used to silence the working fluid entering the air inlet of the compressor; a filter assembly, the filter assembly being arranged in the first air inlet channel, and the filter assembly and the silencer assembly being connected; the filter assembly having a second air outlet, the second air outlet being connected to the first air outlet; the filter assembly being used to filter the working fluid. In this way, by integrating the silencer assembly and the filter assembly, and then connecting the silencer filter to the air inlet of the compressor, the silencer filter can silence and filter the working fluid at the same time, thereby improving the noise reduction effect while filtering.

[0041] It can be understood that, compared with the prior art, the compressor provided in the embodiment of the present application has all the technical features and beneficial effects of the above-mentioned silencer filter, which will not be elaborated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0043] Figure 1 A schematic diagram of the structure of a noise reduction filter provided in an embodiment of the present application;

[0044] Figure 2 A schematic diagram of the connection between a guide pin and a guide groove in a silencer filter provided in an embodiment of the present application;

[0045] Figure 3 A bottom view of a silencer filter provided in an embodiment of the present application.

[0046] Figure markings: 100-silencer assembly; 110-first air inlet; 120-first air outlet; 130-first air inlet channel; 140-shell; 150-first fixing member; 151-partition; 152-fixing portion; 153-support ring; 160-accommodating space; 170-sound-absorbing portion; 180-sealing plate; 190-guide ring; 191-guide pin; 200-filter assembly; 210-second air outlet; 220-filter portion; 221-second air inlet; 222-third air inlet; 230-second air inlet channel; 240-sealing portion; 250-second fixing member; 251-guide groove; 260-support rod; 300-first connecting pipe; 400-second connecting pipe; 500-liquid spray pipe; 510-liquid spray end; 511-liquid spray through hole. DETAILED DESCRIPTION

[0047] The technical solutions in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0048] The applicant found that in current engineering practice, an intake silencer and an intake filter are usually arranged in sequence in the intake pipe of the compressor along the direction of process gas flow, and the intake silencer, the intake filter, the compressor inlet short circuit, and the compressor air inlet are connected by pipes. In this way, the distance between the intake silencer and the compressor air inlet is several meters to tens of meters, and the noise reduction effect is not good.

[0049] In view of this, the embodiment of the present application provides a silencer filter, which combines the silencer assembly 100 and the filter assembly 200 together, and the silencer assembly 100 and the filter assembly 200 are arranged close to the compressor air inlet at the same time, which can prevent hard particles from being sucked in through the air intake pipe, thereby getting stuck or damaging the rotor and the housing, and can also reduce the noise at the compressor air inlet. At the same time, the spray pipe 500 is arranged on the second connecting pipe 400 of the silencer filter, and the noise is further reduced by spraying liquid to cool the working medium. In addition, considering that the filter assembly 200 needs to be cleaned or replaced regularly after being blocked, the silencer assembly 100 and the filter assembly 200 are arranged to be detachably connected.

[0050] See also Figure 1 , Figure 1 The schematic diagram of the structure of a silencer filter provided in an embodiment of the present application is illustrated. The first embodiment of the present application provides a silencer filter, including a silencer assembly 100 and a filter assembly 200; wherein the silencer assembly 100 has a first air inlet channel 130, a first air inlet 110 and a first air outlet 120, and the first air inlet 110 is connected to the first air outlet 120 through the first air inlet channel 130; the first air outlet 120 is used to communicate with the air inlet of the compressor; the silencer assembly 100 is used to silence the working fluid entering the air inlet of the compressor; the filter assembly 200 is arranged in the first air inlet channel 130, and the filter assembly 200 is connected to the silencer assembly 100; the filter assembly 200 has a second air outlet 210, and the second air outlet 210 is connected to the first air outlet 120; the filter assembly 200 is used to filter the working fluid. In this way, the silencer assembly 100 and the filter assembly 200 are combined together and arranged close to the compressor air inlet at the same time, which can not only prevent hard particles from being sucked in through the air intake pipe and thereby getting stuck or damaging the rotor and the casing, but also reduce the noise at the compressor air inlet.

[0051] Specifically, the muffler assembly 100 of the present application can be a resistive muffler structure, and is arranged along the air intake direction X, especially a straight circular tube type resistive muffler structure. The resistive muffler structure can effectively absorb and reduce the noise generated when the compressor is inhaled, thereby reducing the overall noise level, improving the working environment and reducing the impact on the surrounding environment.

[0052] In some embodiments, the muffler assembly 100 includes a shell 140, a first fixing member 150 and a sound absorbing part 170; a first air inlet passage 130 is formed inside the shell 140 along the air inlet direction X; wherein the air inlet direction X is the direction from the first air inlet port 110 to the first air outlet port 120; the first fixing member 150 is disposed on the side of the shell 140 facing the first air inlet passage 130, and a receiving space 160 is formed between the first fixing member 150 and the shell 140; the sound absorbing part 170 is disposed in the receiving space 160. In this way, the sound absorbing part 170 is fixed at a fixed position in the shell 140 by the first fixing member 150, so as to avoid the displacement of the sound absorbing part 170 due to the vibration of the compressor, or the change of the internal density of the sound absorbing part 170, which affects the muffler effect.

[0053] In some embodiments, the sound absorbing part 170 is made of stainless steel velvet, and the density of the sound absorbing part 170 is greater than or equal to 0.5 g / cm 3 Specifically, the sound absorbing part 170 can be made of stainless steel velvet made of 304 stainless steel or stainless steel velvet made of 316 stainless steel, so that the sound absorbing part 170 has excellent corrosion resistance and is not easy to break into powder. In addition, when selecting the sound absorbing part 170, a material with a higher density should be selected as much as possible. The higher the density of the sound absorbing part 170, the higher the mid- and low-frequency sound absorption coefficient. Preferably, the density of the sound absorbing part 170 is greater than or equal to 0.5 g / cm 3 In addition, when filling the sound absorbing part 170 , it should be ensured that the sound absorbing part 170 is evenly distributed, so as to avoid uneven density distribution inside the sound absorbing part 170 and affect the sound absorbing effect of the sound absorbing part 170 .

[0054] In some embodiments, the first fixing member 150 includes a fixing portion 152 and a plurality of partitions 151. The partition 151 is connected to the side of the housing 140 facing the first air inlet passage 130, and the partitions 151 are arranged opposite to each other along the air inlet direction X; the fixing portion 152 connects the partitions 151 arranged opposite to each other, and a receiving space 160 is formed between the partitions 151, the partitions 151 and the housing 140. When in use, the fixing portion 152 and the plurality of partitions 151 can be welded together, thereby increasing the structural strength of the first fixing member 150, further avoiding the influence of the compressor vibration on the silencer filter, and improving the silencer effect.

[0055] In some embodiments, the first fixing member 150 further includes a plurality of support rings 153, which are disposed on a side of the partition 151 away from the sound absorbing portion 170, and the support rings 153 connect the housing 140 and the partition 151. Specifically, the support rings 153 can be welded to the partition 151 to further increase the structural strength of the first fixing member 150, prevent the influence of the compressor vibration on the silencer filter, and improve the silencer effect.

[0056] In some embodiments, the muffler assembly 100 further includes a plurality of sealing plates 180, which are relatively arranged at the two ends of the housing 140 along the air inlet direction X, and the sealing plates 180 are respectively provided with a first air inlet 110 and a first air outlet 120. By providing the sealing plates 180, the other structures of the muffler assembly 100 are encapsulated in the housing 140, and the flow direction of the working medium is controlled by the first air inlet 110 and the first air outlet 120, so that the muffler assembly 100 can work fully and the muffler effect can be improved.

[0057] In some embodiments, the muffler assembly 100 further includes a guide ring 190, the guide ring 190 is connected to the partition 151, and the guide ring 190 is detachably connected to the filter assembly 200. It should be noted that in the present application, the partition 151 is connected to the guide ring 190, which can ensure that the filter assembly 200 fits with the partition 151 close to the first air outlet 120 under the action of its own gravity, and avoids the filter assembly 200 jumping out of the guide ring 190 due to the vibration of the compressor, thereby improving the stability of the muffler filter and improving the muffler and filtering effects.

[0058] In some embodiments, the filter assembly 200 includes a filter part 220, a sealing part 240, and a second fixing part 250. The filter part 220 has a second air inlet 221 and a second air outlet 210 arranged relatively along the air inlet direction X, and the second air inlet 221 and the second air outlet 210 are connected to form a second air inlet channel 230; the filter part 220 also has a plurality of third air inlets 222, and the first air inlet channel 130 and the second air inlet channel 230 are connected through the third air inlets 222; the sealing part 240 covers the second air inlet 221; the filter part 220 is detachably connected to the muffler assembly 100 through the second fixing part 250. Specifically, the filter part 220 can be a conical structure to increase the contact area between the working medium and the filter part 220 and improve the filtering effect. Furthermore, the filter part can be formed by punching a stainless steel plate or a filter plate of other materials, rolling and welding. The third air inlet 222 is formed by punching, and the second air inlet 221 and the second air outlet 210 are formed after rolling. This structure facilitates the subsequent maintenance and cleaning of the filter part 220. In addition, the sealing part 240 can be an elliptical head, so as to increase the guiding effect on the working fluid, further increase the contact area between the working fluid and the filter part 220, and improve the filtering effect. The second fixing member 250 can be an annular sleeve to realize the detachable connection between the filter part 220 and the muffler assembly 100.

[0059] In some embodiments, the filter assembly 200 further includes a support rod 260, and the sealing portion 240 and the support ring 153 are connected by the support rod 260. It should be noted that the sealing portion 240 and the support rod 260 can be welded and connected. In order to further enhance the supporting effect of the support rod 260, four support rods 260 can be evenly welded on the side of the sealing portion 240. For two opposite support rods 260, the distance between the ends of the support rods 260 away from the sealing portion 240 is slightly smaller than the inner diameter of the support ring 153. In addition, the axis of the support rod 260 is parallel to the sealing plate 180, thereby further preventing the filter assembly 200 from tipping over due to the vibration of the compressor, thereby affecting the filtering effect.

[0060] See also Figure 2 , Figure 2 The schematic diagram of the connection between the guide pin and the guide groove in a muffler filter provided by the embodiment of the present application is shown; in some embodiments, the guide ring 190 is provided with a guide pin 191; the second fixing member 250 is provided with a guide groove 251; the guide pin 191 and the guide groove 251 are matched and connected, so that the muffler assembly 100 and the filter assembly 200 can be detachably connected. Specifically, the guide groove 251 can be shape, and the width of the guide groove 251 is greater than the diameter of the guide pin 191. In the present application, considering that the filter assembly 200 needs to be cleaned, repaired or replaced regularly after being blocked, the silencer assembly 100 and the filter assembly 200 are set to be detachably connected, so as to facilitate the cleaning, repair or replacement of the filter assembly 200 or the silencer assembly 100.

[0061] In some embodiments, the muffler filter further includes a first connecting pipe 300, and the first connecting pipe 300 is connected to the first air inlet 110. The first connecting pipe 300 is used to connect to the working medium supply device.

[0062] Please refer again Figure 1 , see also Figure 3 , Figure 3 The top view of a silencer filter provided in an embodiment of the present application is illustrated. In some embodiments, the silencer filter further includes a second connecting pipe 400 and a liquid spray pipe 500. The second connecting pipe 400 is connected to the first air outlet 120, and the second connecting pipe 400 is connected to the air inlet of the compressor; the liquid spray pipe 500 is connected to the second connecting pipe 400, and the liquid spray pipe 500 has a liquid spray end 510, and the liquid spray end 510 extends into the second connecting pipe 400; wherein the liquid spray end 510 is provided with a plurality of liquid spray through holes 511 along the air inlet direction X. In the embodiment of the present application, the liquid spray pipe 500 is arranged on the second connecting pipe 400 of the silencer filter, and a certain number of liquid spray through holes 511 are arranged on the liquid spray end 510, so that the liquid spray medium is distributed as evenly as possible in the second connecting pipe 400, and further noise reduction is performed by cooling the working medium by liquid spray.

[0063] It should be noted that when the silencer filter provided in the embodiment of the present application is working, the flow rate of the working fluid entering the silencer filter should be controlled between 10 and 20 m / s. An appropriately low flow rate of the working fluid can reduce the resistance of the silencer filter.

[0064] Preferably, the working fluid flow rate is controlled between 14 and 15 m / s to avoid too low a working fluid flow rate causing the volume of the silencer filter to be too large.

[0065] Accordingly, the second embodiment of the present application provides a compressor, the type of the compressor is an oil-free liquid injection twin-screw compressor or other compressor suitable for using the silencer filter in the present application. The compressor includes a housing, the housing has a compressor air inlet; the compressor also includes a silencer filter as in any one of the first embodiments above, and the first air outlet 120 of the silencer filter is connected to the compressor air inlet.

[0066] It can be understood that, compared with the prior art, the compressor provided in the embodiment of the present application has all the technical features and beneficial effects of the above-mentioned silencer filter, which will not be elaborated here.

[0067] The above is a detailed introduction to a silencer filter and a compressor provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and its core idea of ​​the present application. Ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some of the technical features therein with equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A noise-reducing filter, characterized in that: include: A silencer assembly (100), the silencer assembly (100) comprising a first air inlet passage (130), a first air inlet (110) and a first air outlet (120), the first air inlet (110) being connected to the first air outlet (120) via the first air inlet passage (130); the first air outlet (120) being connected to an air inlet of a compressor; the silencer assembly (100) being used to silence a working medium entering the air inlet of the compressor; A filter assembly (200), wherein the filter assembly (200) is arranged in the first air inlet channel (130), and the filter assembly (200) is connected to the silencer assembly (100); the filter assembly (200) has a second air outlet (210), and the second air outlet (210) is connected to the first air outlet (120); the filter assembly (200) is used to filter the working medium.

2. The sound-absorbing filter according to claim 1, characterized in that: The muffler assembly (100) comprises: A housing (140), wherein the first air inlet passage (130) is formed inside the housing (140) along an air inlet direction (X); wherein the air inlet direction (X) is a direction from the first air inlet (110) to the first air outlet (120); a first fixing member (150), the first fixing member (150) being arranged on a side of the housing (140) facing the first air inlet passage (130), and forming an accommodation space (160) between the first fixing member (150) and the housing (140); A sound absorbing portion (170), wherein the sound absorbing portion (170) is disposed in the accommodating space (160).

3. The sound-absorbing filter according to claim 2, characterized in that: The first fixing member (150) comprises: a plurality of partitions (151), the partitions (151) being connected to a side of the housing (140) facing the first air intake passage (130), and the partitions (151) being arranged opposite to each other along the air intake direction (X); A fixing portion (152), wherein the fixing portion (152) is connected to the partitions (151) arranged opposite to each other, and the accommodating space (160) is formed between the partitions (151), the partitions (151) and the shell (140).

4. The noise-reducing filter according to claim 3, characterized in that: The first fixing member (150) further comprises: A plurality of support rings (153), wherein the support rings (153) are arranged on a side of the partition (151) away from the sound absorbing portion (170), and the support rings (153) connect the shell (140) and the partition (151).

5. The sound-absorbing filter according to claim 2, characterized in that: The muffler assembly (100) further comprises: A plurality of sealing plates (180), wherein the sealing plates (180) are relatively arranged at two ends of the shell (140) along the air intake direction (X), and the first air intake port (110) and the first air outlet port (120) are respectively provided on the sealing plates (180).

6. The sound-absorbing filter according to claim 4, characterized in that: The muffler assembly (100) further comprises: A guide ring (190), wherein the guide ring (190) is connected to the partition plate (151), and the guide ring (190) is detachably connected to the filter assembly (200).

7. The sound-absorbing filter according to claim 6, characterized in that: The filter assembly (200) comprises: A filter portion (220), the filter portion (220) comprising a second air inlet (221) and a second air outlet (210) arranged opposite to each other along an air inlet direction (X), the second air inlet (221) and the second air outlet (210) being connected to form a second air inlet channel (230); the filter portion (220) further comprising a plurality of third air inlets (222), the first air inlet channel (130) and the second air inlet channel (230) being connected via the third air inlets (222); a sealing portion (240), the sealing portion (240) sealing the second air inlet (221); A second fixing member (250), the filter portion (220) is detachably connected to the silencer assembly (100) via the second fixing member (250).

8. The sound-absorbing filter according to claim 7, characterized in that: The filter assembly (200) further comprises: A support rod (260), wherein the sealing portion (240) and the support ring (153) are connected via the support rod 260.

9. The noise-reducing filter according to claim 7, wherein: The guide ring (190) is provided with a guide pin (191); The second fixing member (250) is provided with a guide groove (251); The guide pin (191) and the guide groove (251) are connected in a cooperative manner so that the silencer assembly (100) and the filter assembly (200) are detachably connected.

10. The noise-reducing filter according to claim 7, wherein: Also includes: A first connecting pipe (300), wherein the first connecting pipe (300) is in communication with the first air inlet (110).

11. The noise-reducing filter according to claim 7, wherein: Also includes: A second connecting pipe (400), the second connecting pipe (400) being in communication with the first air outlet (120), and the second connecting pipe (400) being in communication with the air inlet of the compressor; A liquid spraying pipe (500), the liquid spraying pipe (500) being in communication with the second connecting pipe (400), the liquid spraying pipe (500) having a liquid spraying end (510), and the liquid spraying end (510) extending into the interior of the second connecting pipe (400); Wherein, the liquid spraying end (510) is provided with a plurality of liquid spraying through holes (511) along the air inlet direction (X).

12. The sound-absorbing filter according to claim 2, characterized in that: The sound absorbing part (170) is stainless steel velvet, and the density of the sound absorbing part (170) is greater than or equal to 0.5 g / cm 3 .

13. A compressor, characterized in that: include: a body having a compressor air inlet; The silencer filter according to any one of claims 1 to 12, wherein the first air outlet (120) of the silencer filter is in communication with the air inlet of the compressor.

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