CN115807756A - Silencer and compressor - Google Patents

Abstract

The application relates to a silencer and a compressor, wherein the silencer comprises a shell, a compressor body and a compressor body, wherein the shell is provided with an air inlet, an air outlet and an air flow channel for communicating the air inlet and the air outlet; the silencing piece is arranged in the airflow channel; the air flow channel extends in a bending way from the air inlet to the air outlet. Through setting up the air flow passage of crooked extension to set up the amortization piece on air flow passage, can make air flow passage's route longer in the space of limited muffler, thereby make the air current can carry out the amortization through the amortization piece through air flow passage continuously, the muffler is obvious to the effect that weakens of air current pulsation.

Description

Silencer and compressor

Technical Field

The application relates to the technical field of silencers, in particular to a silencer and a compressor.

Background

The air pulsation of the exhaust cavity of the compressor is a main source of noise generated when the compressor works, and the periodic communication of air suction and exhaust of the compressor increases the air pulsation, so that the vibration noise of the air suction cavity and the air exhaust cavity of the compressor is increased. At present, methods for reducing the airflow pulsation noise of a compressor mainly comprise the steps of slowing down the airflow pulsation, adding a silencer and improving a valve plate structure, wherein the method for adding the silencer is applied more.

However, the structure and the installation environment of the compressor are limited, and the requirement of the compressor on the internal space is absolutely strict, so that the available space in the compressor is more limited, the installation space reserved for the silencer in the cavity is small, the space in the silencer is too small, and the effect of weakening the airflow pulsation by the silencer is not obvious.

Disclosure of Invention

In view of the above, it is necessary to provide a muffler and a compressor capable of making the effect of reducing the pulsation of the gas flow by the muffler remarkable when the space in the muffler is too small, in order to solve the problem that the effect of reducing the pulsation of the gas flow by the muffler is not remarkable when the space in the muffler is too small.

In a first aspect, the present application provides a muffler comprising:

the shell is provided with an air inlet, an air outlet and an air flow channel communicated with the air inlet and the air outlet; and

the silencing piece is arranged in the airflow channel;

wherein, the air flow channel is bent and extended from the air inlet to the air outlet.

In one embodiment, the airflow channel comprises a plurality of sub-airflow channels which are sequentially communicated along the extending direction of the airflow channel, each sub-airflow channel extends in a bending way from the air inlet to the air outlet, and the bending directions of two adjacent sub-airflow channels are opposite.

In one embodiment, the airflow passage extends in a zigzag shape from the intake port to the exhaust port.

In one embodiment, the inner wall of the housing has a plurality of flow guiding portions protruding inwards or sinking outwards, and all the flow guiding portions are arranged at intervals in the direction from the air inlet to the air outlet so as to form an air flow channel in the housing.

In one embodiment, the silencer comprises a first flow guide group and a second flow guide group, the first flow guide group and the second flow guide group are respectively provided with at least one flow guide part, and the first flow guide group and the second flow guide group are arranged oppositely.

In one embodiment, the side wall of a part of the outer shell is inwards recessed to form a corresponding inwards protruding flow guide part, or the side wall of a part of the outer shell is outwards protruding to form a corresponding inwards recessed flow guide part.

In one embodiment, the flow guide part is provided with at least two flow guide planes which are sequentially arranged from the air inlet to the air outlet, and an included angle is formed between any two adjacent flow guide planes.

In one embodiment, the flow guide is covered with a sound absorbing structure.

In one embodiment, the silencer comprises a plurality of silencing pieces, and the plurality of silencing pieces are arranged at intervals along the extending direction of the airflow passage.

In one embodiment, all of the muffling elements are arranged in the gas flow passage in a path that coincides with the curved extension path of the gas flow passage.

In one of the embodiments, opposite ends of the silencer member extend to be connected to the inner wall of the gas flow passage in a direction intersecting the extending direction of the gas flow passage.

In one embodiment, opposite ends of the silencer are embedded in the airflow passage.

In one embodiment, the joint of the silencing piece and the inner wall of the airflow channel is provided with a shock absorption structure.

In one of the embodiments, the silencer has a flow gap between the silencer and an inner wall of the gas flow passage in a circumferential direction in a direction intersecting an extending direction of the gas flow passage.

In one embodiment, the silencing piece is provided with a silencing hole and a silencing cavity, and the silencing hole is communicated with the airflow channel and the silencing cavity.

In one embodiment, the silencing piece is cylindrical, and the axial direction of the silencing piece is intersected with the extending direction of the airflow channel.

In one embodiment, the silencing piece comprises a plurality of silencing holes and a plurality of mutually independent silencing cavities, wherein at least one silencing hole is communicated with the airflow channel and the corresponding silencing cavity;

the plurality of sound-deadening chambers are arranged in order in a direction intersecting with the extending direction of the air flow passage.

In one embodiment, a silencing connector is arranged at the air inlet of the shell and used for being connected with an external structure, and the silencing connector is used for silencing air flow at the air inlet.

In one embodiment, a check valve is disposed at the exhaust port of the housing for preventing the air flow from flowing back from the exhaust port to the air flow passage.

In a second aspect, a compressor is further provided, which includes the above muffler.

Above-mentioned muffler and compressor through setting up the air flow channel of crooked extension to set up the amortization piece on air flow channel, can make air flow channel's route longer in the space of limited muffler, thereby make the air current can continuously carry out the amortization through the amortization piece through air flow channel, the muffler is obvious to the effect that weakens of air current pulsation.

Drawings

FIG. 1 is a schematic view of a muffler according to an embodiment of the present application;

FIG. 2 is a schematic view of the muffler shown in FIG. 1 from another perspective;

FIG. 3 is a schematic cross-sectional view of the muffler of FIG. 1;

fig. 4 is a schematic cross-sectional view of a silencer in an embodiment of the present application.

Reference numerals are as follows:

a muffler 100;

a housing 10;

the air inlet 11, the air outlet 12, the air flow channel 13, the sub-air flow channel 131, the flow gap 132, the flow guide part 14, the flow guide plane 141, the first side wall 15, the second side wall 16, the first part 17, and the second part 18;

a silencer 20;

a silencing hole 21 and a silencing cavity 22;

a shock-absorbing structure 30;

a sound deadening coupler 40;

a check valve 50.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. This application is capable of embodiment in many different forms than those described herein and those skilled in the art will be able to make similar modifications without departing from the spirit of the application and therefore the application is not limited to the specific embodiments disclosed below.

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. The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present application, it is to 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," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.

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

In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" 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. As used herein, the terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are for purposes of illustration only and do not denote a single embodiment.

The accompanying drawings are not 1:1, and the relative dimensions of the various elements in the figures are drawn for illustration only and not necessarily to true scale.

FIG. 1 is a schematic view of a muffler according to an embodiment of the present application; FIG. 2 is a schematic view of the muffler shown in FIG. 1 from another perspective; fig. 3 is a schematic sectional view of the muffler shown in fig. 1.

Referring to fig. 1 to 3, an embodiment of the present application provides a silencer 100, which includes a housing 10 and a silencer element 20. The silencer 100 of the present application may be applied to a compressor, specifically, a screw compressor, and the silencer 100 may also be applied to other devices suitable for the compressor, specifically, but not limited to.

The housing 10 has an intake port 11, an exhaust port 12, and an airflow passage 13 communicating the intake port 11 and the exhaust port 12. In the present embodiment, the intake port 11 communicates with the discharge end of the compressor.

The silencer 20 is provided in the gas flow path 13. The silencer 20 serves to muffle the gas flow. Specifically, the sound attenuating element 20 may be a porous sound attenuating element, and may also be a sound absorbing plate, and the sound absorbing plate may be covered with a sound absorbing coating, which is not limited in particular.

The airflow passage 13 extends in a curved manner from the intake port 11 to the exhaust port 12.

By providing the curved and extended airflow channel 13 and providing the silencer 20 on the airflow channel 13, the path of the airflow channel 13 can be made longer in the limited space of the silencer 100, so that the airflow can be continuously silenced by the silencer 20 through the airflow channel 13, and the silencer 100 has a remarkable attenuation effect on the airflow pulsation.

In the embodiment of the present application, the airflow channel 13 includes a plurality of sub-airflow channels 131 sequentially connected along the extending direction thereof, each sub-airflow channel 131 extends in a curved manner from the intake port 11 to the exhaust port 12, and the curved directions of two adjacent sub-airflow channels 131 are opposite.

In this way, the path of the airflow path 13 can be further lengthened, and the effect of reducing the airflow pulsation can be further improved.

Specifically, the air flow passage 13 extends in an S-shape, Z-shape, or W-shape from the intake port 11 toward the exhaust port 12. The S-shaped, Z-shaped, or W-shaped curved extension makes it possible to make full use of the internal space of the housing 10 and to simplify the structure of the housing 10.

It should be noted that the S, Z or W curved extensions referred to herein are not a single S, Z or W curved extension, but may be a combination of a plurality of S, Z or W curved extensions.

In other embodiments, the airflow channel 13 may also extend in a spiral shape, but the spiral extends in a way that makes the structure of the housing 10 more complicated and the space outside the spiral cannot be fully utilized.

In some embodiments, the inner wall of the casing 10 has a plurality of flow guiding portions 14 protruding inwards or sinking outwards, and all the flow guiding portions 14 are arranged at intervals in the direction from the air inlet 11 to the air outlet 12 to form an air flow channel 13 in the casing 10.

Through set up water conservancy diversion portion 14 on the inner wall at shell 10, can guide the air current turn to be partial to flowing to it is simple to define the mode that forms airflow channel 13 through water conservancy diversion portion 14, and the inner space of shell 10 is also by make full use of, is favorable to forming unobstructed low resistance airflow channel 13, reduces the exhaust pressure loss, and then reaches the purpose of making an uproar of falling under the prerequisite that does not influence the compressor efficiency.

Further, the muffler 100 includes a first flow guiding group and a second flow guiding group, each of which has at least one flow guiding portion 14, and the first flow guiding group and the second flow guiding group are disposed opposite to each other. Specifically, the housing 10 includes a first sidewall 15 and a second sidewall 16 disposed opposite to each other, the first flow guiding group is disposed on the first sidewall, and the second flow guiding group is disposed on the second sidewall.

In this way, the airflow can be guided by both the opposite sides of the airflow channel 13, and thus the airflow can be further drawn into the path of the airflow channel 13.

Furthermore, the flow guiding portions 14 of the first flow guiding group and the flow guiding portions 14 of the second flow guiding group are arranged in a staggered and spaced manner from the air inlet 11 to the air outlet 12.

In other embodiments, the flow guide set may be provided on only one side wall of the housing 10.

Specifically, the side wall of the partial casing 10 is recessed inwards to form the corresponding flow guiding portion 14 protruding inwards, or the side wall of the partial casing 10 is protruding outwards to form the corresponding flow guiding portion 14 recessed inwards.

The flow guide 14 is formed by recessing or protruding the sidewall of the housing 10, thereby simplifying the overall structure of the housing 10.

In some embodiments, the flow guiding portion 14 has at least two flow guiding planes 141 sequentially arranged in a direction from the air inlet 11 to the air outlet 12, and an included angle is formed between any two adjacent flow guiding planes 141. Through setting up water conservancy diversion plane 141, can make the air current flow more smooth and easy, and the guide direction is more accurate, and forms the contained angle between two adjacent water conservancy diversion planes 141, can be to the guide of two not equidirectionals of air current, and then realize that the air current is crooked, through the guide of realizing two not equidirectionals on a water conservancy diversion portion 14, can make the crooked route of air current inseparabler, also the crooked route of airflow channel 13 is inseparable, further utilized the inner space of shell 10.

Specifically, each of the flow guiding parts 14 of the first flow guiding group and the second flow guiding group has at least two flow guiding planes 141 sequentially arranged in a direction from the air inlet 11 to the air outlet 12, and the flow guiding plane 141 of any one of the flow guiding parts 14 of the first flow guiding group is parallel to the flow guiding plane 141 of the flow guiding part 14 of the second flow guiding group adjacent to the flow guiding plane 141. Thus, the air flow is guided to move in the same direction, and the air flow smoothly flows from the air inlet 11 to the air outlet 12, thereby reducing the flow resistance and reducing the exhaust pressure loss.

In some embodiments, the flow guide 14 is overlaid with sound absorbing structures. Specifically, the sound absorbing structure may be disposed to cover the inner surface of the air flow channel 13 of the air guide portion 14, or may be disposed to cover the outer surface of the casing 10 of the air guide portion 14. The sound absorbing structure may be a sound absorbing coating layer, or may be a sound absorbing medium, such as sound absorbing cotton, and is not limited in particular. In this way, by providing sound absorbing structure over deflector 14, the sound absorbing effect of muffler 100 can be further enhanced.

In the embodiment of the present application, the housing 10 includes a first portion 17 and a second portion 18, the first portion 17 and the second portion 18 cover each other, and the first portion 17 and the second portion 18 jointly define an inner space of the housing 10. Specifically, the first portion 17 has a hollow structure with one open end, and the second portion 18 has a plate-like structure and can be covered on the open side of the first portion 17.

When the first portion 17 is a hollow structure with an open end and the second portion 18 is a plate-like structure, in order to further enlarge the internal space of the housing 10, the side wall of part of the second portion 18 is recessed outward to form a cavity, and the cavity extends from the air inlet 11 to the air outlet 12 to form a part of the air flow channel 13.

Further, a sealing member is arranged between the first part 17 and the second part 18, and the first part 17 and the second part 18 are connected through the sealing member.

In some embodiments, the housing 10 is a cast molding. In particular, the first portion 17 and the second portion 18 are both formed by a casting process. The casting molding process is simple, and the internal structure of the molded housing 10 is more precise.

In the embodiment of the present application, the silencer 100 includes a plurality of silencing pieces 20, and the plurality of silencing pieces 20 are arranged at intervals along the extending direction of the gas flow passage 13.

Thus, the air flow can sequentially pass through the plurality of muffling members 20 in the process of flowing through the air flow passage 13, and multi-layer noise elimination in low and high frequency ranges can be realized.

In addition, because the pulsating gas flow passes through the silencing pieces 20 and also passes through the gap between two adjacent silencing pieces 20, various different gas flow pulsation and attenuation can be formed, and the silencing effect is improved.

Further, the arrangement path of all of the silencing pieces 20 in the gas flow passage 13 coincides with the curved extension path of the gas flow passage 13. In this way, the pulsating airflow in airflow channel 13 can all pass through silencer 20, and the silencing effect can be improved.

The arrangement path of all the muffling members 20 in the gas flow passage 13 means a connecting line formed by connecting all the muffling members 20, and the connecting line path is similar to the curved extending path of the gas flow passage 13. The connecting line formed by connecting all the sound absorbing members 20 can be a connecting line formed by connecting any one of the center point, the geometric center, the centerline axis and the like of the sound absorbing members 20. Specifically, all the muffling members 20 are arranged in a zigzag shape in a direction from the intake port 11 to the exhaust port 12.

Referring to fig. 3 and 4, in some embodiments, the silencing member 20 has a silencing hole 21 and a silencing cavity 22, and the silencing hole 21 communicates with the airflow channel 13 and the silencing cavity 22.

According to the helmholtz resonance principle, when the frequency of the incident sound wave approaches the natural frequency of the gas column inside the resonator, the gas column inside the stub tube produces strong vibrations, during which the sound energy is dissipated by overcoming the frictional resistance. Therefore, when the pulsation frequency of the air flow in the air flow passage 13 is close to the natural frequencies of the muffling opening 21 and the muffling chamber 22, the pulsation of the air flow can be reduced, and the noise in a wide frequency band can be eliminated.

In addition, the air flow in the air flow channel 13 enters the silencing cavity 22 from the silencing hole 21, namely, the air flow changes from a small volume to a large volume suddenly, so that the air pressure becomes small, the flow speed of the air is reduced, and a part of noise is also reduced.

It should be noted that, because the silencing piece 20 is provided with the silencing holes 21 and the silencing cavities 22, the sound absorption coefficient can be changed, the width of the sound absorption frequency band can be increased, and the position of the resonance sound absorption peak can be changed by reasonably changing the size, the number and the position of the silencing holes 21, the wall thickness of the silencing holes 21 and the like, so that the noise can be greatly reduced. The silencer 20 of the present application also improves the versatility of the silencer 100.

Specifically, the silencer 20 has a cylindrical shape, and the axial direction of the silencer 20 intersects the extending direction of the gas flow passage 13.

Thus, the airflow can flow along the outer wall of the silencer 20, reducing the flow resistance and the exhaust pressure. And the silencing hole 21 is arranged on the cylindrical side wall of the silencing piece 20, and can radially enter the silencing cavity 22 through the silencing hole 21, so that the silencing hole can be rapidly changed from a small volume to a large volume, and the noise reduction effect is further improved.

In some embodiments, the silencing member 20 includes a plurality of silencing holes 21 and a plurality of silencing cavities 22 independent from each other, at least one silencing hole 21 communicates the airflow channel 13 with a corresponding silencing cavity 22, and the plurality of silencing cavities 22 are arranged in sequence in a direction intersecting with an extending direction of the airflow channel 13.

Like this, the air current can carry out the amortization through a plurality of amortization chambeies 22 when passing through a amortization piece 20, so, can realize falling the making an uproar to the air current of different frequency channels, and then improve noise reduction effect.

Specifically, the volume of each muffling chamber 22 and the number, size, position, etc. of the corresponding muffling holes 21 may be different.

In the embodiment of the present application, the plurality of sound-deadening chambers 22 are arranged in order in the axial direction of the cylindrical sound-deadening member 20.

In some embodiments, opposite ends of the silencing piece 20 extend to be connected to the inner wall of the gas flow passage 13 in a direction intersecting the extending direction of the gas flow passage 13.

In this way, the pulsating airflow can be attenuated by the silencer 20 when flowing through the airflow passage 13.

Specifically, opposite ends of the silencer 20 are fitted in the airflow passage 13.

By the way of the embedding, the installation and the disassembly of the silencing piece 20 become easy. In particular, the opposite ends of the silencing element 20 abut against the inner walls of the first and second portions 17 and 18, respectively.

In the embodiment of the present application, a shock absorbing structure 30 is provided at the junction of the silencer 20 and the inner wall of the gas flow passage 13.

In this manner, when the silencer 20 collides with the casing 10 under the impact of the pulsating gas flow to generate noise, the collision can be avoided by the shock-absorbing structure 30, thereby eliminating the collision noise therebetween.

Specifically, the shock-absorbing structure 30 includes an elastic shock-absorbing pad. The elastic cushion may be fitted over the end of the silencer 20 connected to the inner wall of the airflow passage 13. More specifically, the number of the elastic damping pads is two, and the two elastic damping pads are respectively sleeved on two opposite ends of the noise damping member 20.

In some embodiments, the silencer 20 has a flow gap 132 between the inner wall of the gas flow passage 13 and the circumferential direction in a direction intersecting the extending direction of the gas flow passage 13. Specifically, a cylindrical surface of the cylindrical muffler member 20 and an inner wall of the gas flow passage 13 have a flow gap 132 therebetween.

By providing the flow gaps 132, the pulsating air flow can pass through the flow gaps 132, and a plurality of different air flow pulsations and attenuations can be formed, so that the initial pulsating air flow is gradually smoothed in the air flow channel 13, and noise reduction is facilitated.

In addition, due to the existence of the circulation gap 132, a smooth low-resistance airflow channel 13 can be formed, the exhaust pressure loss is reduced, and the purpose of noise reduction is achieved on the premise of not influencing the energy efficiency of the compressor.

In some embodiments, the housing 10 is provided with a sound deadening connector 40 at the air inlet 11, the sound deadening connector 40 for connecting to an external structure, the sound deadening connector 40 for muffling the air flow at the air inlet 11. Specifically, the sound-deadening coupling 40 is adapted to be coupled to the discharge end of the compressor.

The specific structure of the sound-deadening coupling member 40 is similar to that of the sound-deadening member 20, and will not be described in detail. Except that the muffling chamber 22 of the muffling connecting piece 40 is communicated with the air inlet 11 and is communicated with the inner cavity of the housing 10 through the muffling hole 21.

In some embodiments, a check valve 50 is disposed at the exhaust port 12 of the housing 10 for preventing the airflow from flowing back from the exhaust port 12 to the airflow path 13.

Specifically, the check valve 50 is fixed or interference-fitted at the exhaust port 12 by a check ring.

Based on the same inventive concept, the present application also provides a compressor including the muffler 100 of any of the above embodiments.

The silencer 100 and the compressor provided by the embodiment of the application have the following beneficial effects:

by providing the curved and extended airflow channel 13 and providing the silencer 20 on the airflow channel 13, the path of the airflow channel 13 can be made longer in the limited space of the silencer 100, so that the airflow can be continuously silenced by the silencer 20 through the airflow channel 13, and the silencer 100 has a remarkable attenuation effect on the airflow pulsation.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several implementation modes of the present application, and the description thereof is specific and detailed, but not construed as limiting the scope of the patent. It should be noted that various changes and modifications can be made by those skilled in the art without departing from the spirit of the invention, and these changes and modifications are all within the scope of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (20)

1. A muffler (100), comprising:

a housing (10) having an air inlet (11), an air outlet (12), and an air flow passage (13) communicating the air inlet (11) and the air outlet (12); and

a silencer (20) arranged in the gas flow passage (13);

wherein the air flow channel (13) extends in a curved manner from the air inlet (11) in the direction of the air outlet (12).

2. A silencer (100) according to claim 1, wherein said airflow channel (13) comprises a plurality of sub-airflow channels (131) connected in sequence along the extending direction thereof, each sub-airflow channel (131) extends in a curved manner from the air inlet (11) to the air outlet (12), and the curved directions of two adjacent sub-airflow channels (131) are opposite.

3. A silencer (100) according to claim 1, characterized in that the gas flow channel (13) extends S-, Z-or W-shaped in the direction from the gas inlet (11) to the gas outlet (12).

4. A silencer (100) according to claim 1, wherein the inner wall of the housing (10) has a plurality of flow guiding portions (14) protruding inward or recessed outward, and all the flow guiding portions (14) are arranged at intervals in a direction from the air inlet (11) to the air outlet (12) to form the air flow passage (13) in the housing (10).

5. A silencer (100) according to claim 4, wherein the silencer (100) comprises a first flow guiding group and a second flow guiding group, each of the first flow guiding group and the second flow guiding group having at least one flow guiding portion (14), the first flow guiding group being arranged opposite the second flow guiding group.

6. The silencer (100) of claim 4, wherein part of the side walls of the housing (10) are recessed inwardly to form the corresponding inwardly projecting flow guides (14), or part of the side walls of the housing (10) are raised outwardly to form the corresponding inwardly recessed flow guides (14).

7. The muffler (100) of claim 2, wherein the flow guide portion (14) has at least two flow guide planes (141) arranged in sequence from the air inlet (11) to the air outlet (12), and an included angle is formed between any two adjacent flow guide planes (141).

8. A silencer (100) according to claim 2, wherein the flow guide (14) is coated with a sound absorbing structure.

9. A silencer (100) according to any of claims 1 to 8, wherein the silencer (100) comprises a plurality of the silencing pieces (20), and the plurality of the silencing pieces (20) are arranged at intervals along the extending direction of the gas flow passage (13).

10. A silencer (100) according to claim 9, characterized in that all of said silencing pieces (20) are arranged in said gas flow passage (13) in a path that coincides with the curved extension of said gas flow passage (13).

11. A silencer (100) according to any of claims 1-8, characterized in that opposite ends of the silencer member (20) extend to be connected to the inner wall of the gas flow channel (13) in a direction intersecting the direction of extension of the gas flow channel (13).

12. A silencer (100) according to claim 11, wherein opposite ends of the silencer element (20) are embedded in the gas flow channel (13).

13. A silencer (100) according to any of claims 1-8, characterized in that the connection of the silencer (20) to the inner wall of the gas flow channel (13) is provided with a damping structure (30) (30).

14. A silencer (100) according to any of claims 1-8, characterized in that the silencer (20) has a flow-through gap (132) between it and the inner wall of the gas flow channel (13) in the circumferential direction, in a direction intersecting the direction of extension of the gas flow channel (13).

15. A silencer (100) according to any of claims 1-8, wherein said silencer (20) has a silencing hole (21) and a silencing chamber (22), said silencing hole (21) communicating said air flow channel (13) with said silencing chamber (22).

16. A silencer (100) according to claim 15, wherein the silencer (20) is cylindrical, the axial direction of the silencer (20) intersecting the direction of extension of the gas flow channel (13).

17. A silencer (100) according to claim 15, wherein the silencing member (20) comprises a plurality of said silencing holes (21) and a plurality of said silencing chambers (22) independent of each other, at least one of said silencing holes (21) communicating said air flow passage (13) with a corresponding one of said silencing chambers (22);

the plurality of sound-deadening chambers (22) are arranged in order in a direction intersecting with the extending direction of the airflow passage (13).

18. The silencer (100) of any of claims 1 to 8, wherein the housing (10) is provided with a silencing connection (40) at the inlet (11), the silencing connection (40) being adapted to be connected to an external structure, the silencing connection (40) being adapted to silence the flow of gas at the inlet (11).

19. A silencer (100) according to any of claims 1-8, wherein a check valve (50) is arranged at the exhaust opening (12) of the housing (10), the check valve (50) being adapted to prevent a gas flow from flowing back from the exhaust opening (12) to the gas flow channel (13).

20. A compressor, characterized by comprising a muffler (100) according to any one of claims 1 to 19.

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