Silencing device for compressor.

Abstract

The embodiment provides a silencing device for a compressor, comprising a silencer and a check valve. The silencer includes a housing with a first connecting end and an internal silencing assembly. The first connecting end has an opening structure communicating with the housing cavity, and the exhaust end of the silencing assembly extends to this opening. The check valve includes a valve body with a valve core assembly and a second connecting end having a first air inlet. The second connecting end connects to and seals the first connecting end. The exhaust end of the silencing assembly is connected to the air inlet, providing a simple, compact connection that enables a smaller and lighter compressor silencer.

Description

SILENCING DEVICE FOR COMPRESSORFIELD

[0001] Example embodiments of the present application generally relate to the technical field of compressors, and in particular, to a silencing device for a compressor.BACKGROUND

[0002] A silencer and a check valve are usually arranged on an exhaust pipeline of the compressor, exhaust noise is reduced through the silencer, and gas backflow is prevented through the check valve. The silencer used in a high-pressure exhaust pipeline usually adopts a trumpet-shaped structure, and a check valve is usually installed at the joint of the high-pressure exhaust pipeline and the cooler. This not only results in a relatively large size of the silencer itself, but also a complex connection structure between the silencer and the check valve, leading to a large overall structural size.UTILITY MODEL CONTENT

[0003] An objective of the present application is to provide a silencing device for a compressor to solve or at least partially solve the above problems and / or other potential problems existing in conventional silencers and check valves.

[0004] The disclosure provides a silencing device of a compressor. The silencing device of the compressor includes a silencer including a housing and a silencing assembly, the housing having a first connecting end, the first connecting end being provided with a first opening structure communicated with the inner cavity of the housing, the silencing assembly being provided in the inner cavity, and the exhaust end of the silencing assembly extending to the first opening structure; a checkvalve including a valve body and a valve core assembly provided in the valve body, the valve body having a second connecting end, the second connecting end being provided with a first air inlet, the second connecting end being connected to the first connecting end and sealing the first opening structure, the exhaust end of the silencing assembly being connected to the first air inlet.

[0005] In some embodiments, the exhaust end of the silencing assembly is protruded with a first cylinder structure for exhausting; the second connecting end is provided with a first annular groove surrounding the first air inlet, the first cylinder structure extending into the first annular groove and being in sealing connection to the first annular groove.

[0006] In some embodiments, the silencing assembly comprises an air guiding cylinder provided with mesh holes on its cylinder wall and a silencing structure wrapped around the outer circumferential side of the air guiding cylinder, with one end of the air guiding cylinder protruding from the silencing structure body to form the first cylinder structure.

[0007] In some embodiments, an inner circumferential wall of the first annular groove is provided with a first sealing ring; and an outer circumferential surface of the first cylindrical structure is in contact with the first sealing ring to form a sealing connection.

[0008] In some embodiments, an end of the first cylinder structure abuts against a step portion of the first annular groove to limit the silencing assembly from moving toward the checkvalve.1 U1243415

[0009] In some embodiments, a valve cavity of the valve body extends to the second connecting end to form a second opening structure, the second connecting end being provided with a baffle ring for shielding the second opening structure, a middle portion of the baffle ring being provided with the first air inlet, and a surface of the baffle ring opposite to the silencing assembly being provided with the first annular groove.

[0010] In some embodiments, the second connection end is provided with a second annular groove surrounding the second opening structure and communicating with the second opening structure, the baffle ring being at least partially embedded in the second annular groove.

[0011] In some embodiments, a side of the baffle ring facing away from the silencing assembly is provided with a sealing surface surrounding the first air inlet, the valve core assembly being capable of coming into contact with the sealing surface to seal the first air inlet.

[0012] In some embodiments, the valve core assembly comprises a valve core with a mushroom-head shape and a reset elastic piece, the valve core being movably connected within the valve cavity of the valve body; and the reset elastic piece is connected to the valve core for applying a reset elastic force to the valve core.

[0013] In some embodiments, a middle portion of the valve cavity is provided with a supporting portion, a middle portion of the supporting portion being provided with a guiding hole, wherein one side of the valve core facing away from the first air inlet is provided with a guiding rod, the guiding rod being movably connected within the guiding hole.

[0014] In some embodiments, the supporting portion is connected to an inner wall of the valve cavity through a plurality of connecting ribs, the plurality of connecting ribs being arranged at intervals along an outer circumference of the supporting portion, exhaust passages being formed between adjacent connecting ribs.

[0015] In some embodiments, the housing has a second air inlet, wherein a partition plate with a through hole is arranged in the housing, the inner cavity of the housing is divided into an air inlet chamber and a silencing chamber which are communicated with each other through the through hole, the air inlet chamber being communicated with the second air inlet, the silencing chamber is communicated with the first opening structure, and the silencing assembly being arranged in the silencing chamber.

[0016] In some embodiments, the partition plate is provided with an annular protrusion protruding toward the air inlet chamber along a periphery of the through hole.

[0017] In some embodiments, a surface of the partition plate facing the silencing chamber is provided with a third annular groove surrounding the through hole; an inlet end of the silencing assembly is protruded with a second cylinder structure for inlet, the second cylinder structure extending into the third annular groove and being in sealing connection with the third annular groove.

[0018] In some embodiments, an end of the second cylinder structure abuts against a step portion of the third annular groove to limit the silencing assembly from moving toward the partition plate.

[0019] In some embodiments, a peripheral of the first connecting end is provided with a first flange plate, wherein a peripheral of the second connecting end is provided with a second flange plate, and the first connecting end and the second connecting end being connected through the first flange plate and the second flange plate.

[0020] The silencing device for the compressor according to embodiments of the present application, the first connecting end of the housing of the silencer is provided with a first opening structure, and the exhaust end of the silencing assembly extends to the first opening structure. The second connecting end of the valve body of2 U1243415the check valve is provided with a first air inlet. By connecting the first connecting end and the second connecting end, the exhaust end of the silencing assembly may be connected with the first air inlet, and the second connecting end can also seal the first opening structure of the silencer. Therefore, the connection of the silencer and the check valve is realized through a simple and compact connection structure, and miniaturization and light weight of the silencer of the compressor are facilitated.BRIEF DESCRIPTION OF DRAWINGS

[0021] The above and other features, advantages, and aspects of various embodiments of the present application will become more apparent with reference to the following detailed description taken in conjunction with the accompanying drawings. In the drawings, the same or similar reference numbers refer to the same or similar elements, wherein:

[0022] FIG. 1 illustrates a side view of a silencing device for a compressor according to some embodiments of the present disclosure;

[0023] FIG. 2 illustrates a cross-sectional view of a silencing device for a compressor according to some embodiments of the present disclosure;

[0024] FIG. 3 illustrates a perspective cross-sectional view of a silencing device for a compressor according to some embodiments of the present disclosure;

[0025] FIG. 4 illustrates an exploded view of a silencing device for a compressor according to some embodiments of the present disclosure;

[0026] FIG. 5 illustrates a side view of a check valve according to some embodiments of the present application;

[0027] FIG. 6 illustrates an exploded view of a check valve according to some embodiments of the present disclosure;

[0028] FIG. 7 shows a partially enlarged view of part A in FIG. 2; and

[0029] FIG. 8 shows a partially enlarged view of part B in FIG. 2.

[0030] Reference numerals indicate:

[0031] 100 — silencer;

[0032] 110 — housing; 111 — first connecting end; 112 — first opening structure; 113 — first flange plate; 114— second air inlet; 115 — air inlet chamber; 116 — silencing chamber;

[0033] 120 — silencing assembly; 121 — air guiding cylinder; 122 — silencing structure; 123 — first cylinder structure; 124 — second cylinder structure;

[0034] 130 — partition plate; 131 — through hole; 132 — annular protrusion; 133 — third annular groove; 134 — third sealing ring;

[0035] 200 — check valve;

[0036] 210 — valve body; 211 — main body portion 212 — valve cavity; 213 — second connecting end; 214— second flange plate; 215 — second opening structure; 216 — second annular groove; 217 — second groove; 218 — second sealing ring; 219 — reinforcing rib;

[0037] 220 — baffle ring; 221 — first air inlet; 222 — first annular groove; 223 — first sealing ring; 224 — sealing surface; 225 — first groove;3 U1243415

[0038] 230 — valve core assembly; 231 — valve core; 232 — reset elastic piece; 233 — supporting portion;234 — guiding hole; 235 — guiding rod; 236 — connecting rib.DETAILED DESCRIPTION

[0039] Preferred embodiments of the present application will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present application are shown in the drawings, it should be understood that the present application may be implemented in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided to make this application more thorough and complete, and to fully convey the scope of the present application to those skilled in the art.

[0040] As used herein, the term “including” and variations thereof represent open-ended inclusion, i.e., “including but not limited to”. Unless specifically stated, the term “or” means “and / or”. The term “based on” means “based at least in part on”. The terms “an example embodiment” and “an embodiment” mean “at least one example embodiment”. The term “another embodiment” means “at least one further embodiment”. The terms “first,” “second,” and the like may refer to different or identical objects.

[0041] Embodiments of the application provide a silencing device for a compressor, referring to FIG. 1 to FIG. 4, a silencing device for a compressor according to embodiments of this application includes a silencer 100 and a check valve 200.

[0042] The silencer 100 includes a housing 110 and a silencing assembly 120. The housing 110 has a first connecting end 111 provided with a first opening structure 112 communicating with an inner cavity of the housing 110. The silencing assembly 120 is disposed in the inner cavity, and the exhaust end of the silencing assembly 120 extends to the first opening structure 112. The silencing assembly 120 herein is configured to silencing the airflow flowing therethrough to reduce the noise generated by the airflow.

[0043] Alternatively or additionally, the housing 110 may include a cylindrical structure (e.g., cylindrical or approximately cylindrical), and the first connecting end 111 may be an end of the cylindrical structure in the axial direction. The first connecting end 111 of the cylindrical structure may be opened to form the first opening structure 112. The silencing assembly 120 is disposed in the inner cavity close to the first connecting end 111, the exhaust end of the silencing assembly 120 may be aligned with the first connecting end 111, or the exhaust end of the silencing assembly 120 may also protrude from the end surface of the first connecting end 111.

[0044] The check valve 200 includes a valve body 210 and a valve core assembly 230 provided in the valve body 210, and the valve core assembly 230 herein is configured to cooperate with the valve body 210 to form a check function of the check valve 200 to prevent air from flowing backwards. The valve body 210 has a second connecting end 213 provided with a first air inlet 221. The second connecting end 213 is connected to the first connecting end 111, the second connecting end 213 seals the first opening structure 112, and the exhaust end of the silencing assembly 120 is connected to the first air inlet 221.

[0045] Alternatively or additionally, as shown in FIG. 1-6, the valve body 210 may have a main body portion 211 having a valve cavity 212 therein, and one end of the main body portion 211 close to the silencer 100 (i.e., the second connecting end 213) may be provided with a first air inlet 221.4 U1243415

[0046] Alternatively or additionally, the outer circumferential portion of the first connecting end 111 may be provided with a first flange plate 113. The outer peripheral portion of the second connecting end 213 may be provided with a second flange plate 214. The first connecting end 111 and the second connecting end 213 may be connected through the first flange plate 113 and the second flange plate 214. For example, the outer periphery of the first connecting end 111 may extend radially outward to form the first flange plate 113. An outer periphery of the second connecting end 213 may extend radially outward to form a second flange plate 214 matching the first flange plate 113. The second flange plate 214 and the first flange plate 113 may be connected to each other by a plurality of bolts.

[0047] Alternatively or additionally, a plurality of reinforcing ribs 219 may be disposed between the back side of the second flange plate 214 and the outer peripheral portion of the main body portion 211, and the plurality of reinforcing ribs 219 are arranged at intervals along the circumferential direction of the main body portion 211. Alternatively or additionally, the main body portion 211, the second flange plate 214, and the plurality of reinforcing ribs 219 may be of an integrated structure. For example, the valve body 210 may adopt an integrated casting structure.

[0048] The silencing device for the compressor according to embodiments of the present application, the first connection end 111 of the housing 110 of the silencer 100 is provided with a first opening structure 112, and the exhaust end of the silencing assembly 120 extends to the first opening structure 112. The second connection end 213 of the valve body 210 of the check valve 200 is provided with a first air inlet 221. By connecting the first connection end 111 and the second connection end 213 , the connection between the exhaust end of the silencing assembly 120 and the first air inlet 221 can be achieved, and the first opening structure 112 of the silencer 100 can also be sealed. In this way, a direct connection of the silencer 100 and the check valve 200 is achieved through a simple and compact connection structure, which is beneficial for miniaturization and light weight of the silencing device for the compressor.

[0049] In some embodiments, as shown in FIG. 2 and FIG. 6, an exhaust end of the silencing assembly 120 is protruded with a first cylinder structure 123 for exhausting. The second connecting end 213 is provided with a first annular groove 222 surrounding the first air inlet 221, and the first cylinder structure 123 extends into the first annular groove 222 and is in sealing connection with the first annular groove 222. In this way, during assembly and maintenance, only the first connecting end 111 and the second connecting end 213 are opposite, the first cylinder structure 123 of the silencing assembly 120 is opposite to the first annular groove 222 and is inserted into the first annular groove 222, the sealing connection between the exhaust end of the silencing assembly 120 and the first air inlet 221 of the check valve 200 can be achieved at the same time, the structure is simple, and the assembly and maintenance convenience is improved.

[0050] Alternatively or additionally, the silencing assembly 120 may include an air guiding cylinder 121 and a silencing structure 122 wrapped around the outer circumferential side of the air guiding cylinder 121, the cylinder wall of the air guiding cylinder 121 is provided with a plurality of mesh holes, and the silencing structure 122 may be formed by a silencing material. One end of the air guiding cylinder 121 may protrude from the silencing structure 122 to form a first cylinder structure 123 for exhausting.5 U1243415

[0051] Alternatively or additionally, the axis of the silencing assembly 120 may coincide with the axis of the first air inlet 221. In this way, the silencing assembly 120 may be aligned with the first air inlet 221, ensuring that the airflow flowing out from the silencing assembly 120 may stably flow into the first air inlet 221.

[0052] Alternatively or additionally, the inner circumferential wall of the first annular groove 222 is provided with a first sealing ring 223. An outer circumferential surface of the first cylinder structure 123 is in contact with the first sealing ring 223 to form a circumferential sealing connection. For example, an annular step portion may be disposed around the first air inlet 221 on the outer side of the first air inlet 221, and a first annular groove 222 communicating with the first air inlet 221 is formed by the annular step portion on the outer side of the first air inlet 221. For example, the inner circumferential wall of the first annular groove 222 may be provided with a first groove 225 circumferentially, the first sealing ring 223 is disposed in the first groove 225, and the inner circumferential portion of the first sealing ring 223 protrudes from the first groove 225. The first cylinder structure 123 extends into the first annular groove 222 and passes through the first sealing ring 223 , and an outer circumferential surface of the first cylinder structure 123 is in close contact with the inner circumferential portion of the first sealing ring 223 to form a circumferential sealing connection.

[0053] In some embodiments, as shown in FIGS. 2, 6 and 7, the valve cavity 212 of the valve body 210 extends to the second connecting end 213 to form the second opening structure 215. The second connecting end 213 is provided with a baffle ring 220 for shielding the second opening structure 215, the middle portion of the baffle ring 220 is provided with the first air inlet 221, and a surface of the baffle ring 220 opposite to the silencing assembly 120 is provided with the first annular groove 222. In this way, during assembly or maintenance of the check valve 200, the valve core assembly 230 can be firstly installed in the valve cavity 212, and then the second opening structure 215 is sealed by the baffle ring 220, so that the assembly convenience of the check valve 200 can be improved.

[0054] Alternatively or additionally, the second connection end 213 is provided with a second ring groove 216 surrounding the second opening structure 215 and communicating with the second opening structure 215, and the baffle ring 220 is at least partially embedded in the second annular groove 216. In this way, the end surface of the second connection end 213 can be kept flat.

[0055] For example, the second annular groove 216 may be communicated with the second opening structure 215, a groove bottom of the second annular groove 216 may surround the second opening structure 215 and provided with a second groove 217, a second sealing ring 218 may be embedded in the second groove 217, and a part of the second sealing ring 218 protrudes from the second groove 217. The baffle ring 220 is embedded in the second annular groove 216 and is connected to the valve body 210 through a connecting piece such as a bolt. In this way, a sealing connection is achieved between the baffle ring 220 and the valve body 210.

[0056] In some embodiments, as shown in FIG. 2 and FIG. 7, a surface of the baffle ring 220 facing away from the silencing assembly 120 is provided with a sealing surface 224 surrounding the first air inlet 221, and the valve core assembly 230 can be in contact with the sealing surface 224 to seal the first air inlet 221. In this way, the baffle ring 220 not only can be hermetically connected with the silencing assembly 120, but also can cooperate with the valve core assembly 230 to prevent air from flowing reversely, which is beneficial for simplifying the structure of the check valve 200, and is beneficial for improving the convenience of production and processing. For example, as shown in FIG. 7, a side of the baffle ring 220 facing away from the silencing6 U1243415assembly 120 may surround the first air inlet 221 to form a gradually expanding conical slope, and the sealing surface 224 may be formed by the conical slope.

[0057] In some embodiments, with reference to FIGS. 2-4 and 7, the valve core assembly 230 includes a valve core 231 with a mushroom-head shape and a reset elastic piece 232, and the valve core 231 is movably connected within the valve cavity 212 of the valve body 210. The reset elastic piece 232 is connected to the valve core 231 and is used for applying a reset elastic force to the valve core 231 , so that the valve core 231 has a tendency to move towards the sealing surface 224. When the pressure of the airflow exhausted from the silencing assembly 120 is high enough, the airflow can push the valve core 231 to overcome the reset elastic force of the reset elastic piece 232, the valve core 231 moves in a direction away from the sealing surface 224 and leaves the sealing surface 224, and the airflow enters the valve cavity 212 through the gap between the valve core 231 and the sealing surface 224. When the air pressure is low, the valve core 231 is in close contact with the sealing surface 224 under the action of the reset elastic force, so as to seal the first air inlet 221 and prevent the air flow from flowing reversely.

[0058] In some embodiments, as shown in FIG. 2 and FIG. 3, the middle portion of the valve cavity 212 is provided with a supporting portion 233 , a middle portion of the supporting portion 233 is provided with a guiding hole 234, a side of the valve core 231 facing away from the first air inlet 221 is provided with a guiding rod 235, and the guiding rod 235 is movably connected within the guiding hole 234. In this way, the valve core 231 can stably move along the extension direction of the guiding rod 235 and the guiding hole 234, which is beneficial for improving the stability and reliability of the check valve 200. For example, the reset elastic piece 232 may include a reset spring, the reset spring may be sleeved on the guiding rod 235, and two ends of the reset spring may abut against the valve core 231 and the supporting portion 233, respectively. The reset spring may be configured in a compressed state such that the reset spring has an extended tendency to apply a reset elastic force to the valve core 231 toward the sealing face 224. Of course, the reset elastic piece 232 is not limited to a spring, or may be formed by other elastic pieces.

[0059] In some embodiments, as shown in FIG. 3, the supporting portion 233 is connected to the inner wall of the valve cavity 212 through a plurality of connecting ribs 236, the plurality of connecting ribs 236 are arranged at intervals along the outer circumference of the supporting portion 233, and exhaust passages are formed between the adjacent connecting ribs 236. For example, there is one exhaust passage between every two adjacent connecting ribs 236. In this way, the plurality of connecting ribs 236 not only can stably support the supporting portion 233 in the middle of the valve cavity 212, but also can ensure smooth exhaust of airflow through the exhaust passages between the adjacent connecting ribs 236, so as to reduce the gas resistance.

[0060] Alternatively or additionally, the supporting portion 233 has a conical shape or a conical shape with a curved surface, and the tip of the supporting portion 233 faces the first air outlet opposite to the first air inlet 221. In this way, the airflow can be guided to flow to the first air outlet, which is beneficial for reducing the exhaust resistance.

[0061] Alternatively or additionally, the valve body 210, the supporting portion 233, and the connecting ribs 236 may adopt an integrated structure, for example, the valve body 210, the supporting portion 233 and the connecting ribs 236 may adopt an integrated casting structure.7 U1243415

[0062] In some embodiments, as shown in FIG. 2 and FIG. 3, the housing 110 has a second air inlet 114 communicating with the inner cavity, a partition plate 130 is disposed in the inner cavity, and the inner cavity of the housing 110 is divided into an air inlet chamber 115 and a silencing chamber 116 through the partition plate 130. A through hole 131 is formed in the middle of the partition plate 130, and the air inlet chamber 115 and the silencing chamber 116 communicate with each other through the through hole 131. The air inlet chamber 115 is communicated with the second air inlet 114, the silencing chamber 116 is communicated with the first opening structure 112, and the silencing assembly 120 is arranged in the silencing chamber 116. In this way, the airflow flows into the air inlet chamber 115 through the second air inlet 114, and then flows into the silencing chamber 116 through the air inlet chamber 115, which is beneficial for improving the silencing effect of the silencer 100.

[0063] For example, the housing 110 may include a cylindrical structure, one end of the cylindrical structure is open to form the first opening structure 112, and the other end of the cylindrical structure may be sealed. The peripheral portion of the cylindrical structure may be provided with a second air inlet 114, and the second air inlet 114 may be close to the other end of the cylindrical structure. The partition plate 130 may be disposed within the cylindrical structure and close to the middle of the cylindrical structure itself in the axial direction.

[0064] Alternatively or additionally, the partition plate 130 is provided with an annular protrusion 132 protruding toward the air inlet chamber 115 along the periphery of the through hole 131. In this way, the airflow enters the silencing assembly 120 through the annular protrusion 132 after being turned back and disturbed on the outer circumferential side of the annular protrusion 132, which is beneficial for improving the silencing effect of the silencer 100.

[0065] In some embodiments, as shown in FIG. 2, FIG. 3, and FIG. 8, a third annular groove 133 surrounding the through hole 131 is disposed on a surface of the partition plate 130 facing the silencing chamber 116. The air inlet end of the silencing assembly 120 is protruded with a second cylinder structure 124 for air intake, and the second cylinder structure 124 extends into the third annular groove 133 and is in a sealing connection with the third annular groove 133. For example, the other end of the air guiding cylinder 121 ofthe silencing assembly 120 may protrude from the silencing structure 122 to form the second cylinder structure 124. The third annular groove 133 may be provided with a third sealing ring 134, and the second cylinder structure 124 may pass through the third sealing ring 134 and be in close contact with the third sealing ring 134 to achieve sealing connection.

[0066] In some embodiments, the end of the first cylinder structure 123 may abut against the step portion of the first annular groove 225 (that is, the bottom of the groove of the first annular groove 225), and the end of the second cylinder structure 124 may abut against the step portion of the third annular groove 133 (that is, the bottom of the groove of the third annular groove 133). In this way, the silencing assembly 120 can be stably limited between the checkvalve 200 and the partition plate 130, so that the silencing assembly 120 is prevented from moving towards the check valve 200 or the partition plate 130, which is beneficial for improving the stability of the silencing assembly 120.

[0067] The embodiments of the present application have been described above, and the above description is exemplary, not exhaustive, and is not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the illustrated embodiments. The selection of the terms used herein is intended to best explain the principles of the8 U1243415embodiments, practical applications, or technical improvements in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.9 U1243415

Claims

CLAIMS1. A silencing device for a compressor, comprising: a silencer(lOO), comprising a housing(HO) and a silencing assembly(120), the housing(HO) having a first connecting end(lll), the first connecting end (111) being provided with a first opening structure(112) communicated with an inner cavity of the housing(l 10), the silencing assembly (120) being provided in the inner cavity, and the exhaust end of the silencing assembly(120) extending to the first opening structure(112); a check valve (200), comprising a valve body (210) and a valve core assembly (230) provided in the valve body(210) , the valve body(210) having a second connecting end(213), the second connecting end (213) being provided with a first air inlet(221), the second connecting end(213) being connected to the first connecting end(lll), and sealing the first opening structure(112), the exhaust end of the silencing assembly (120) being connected to the first air inlet (221).

2. The silencing device for the compressor of claim 1, wherein the exhaust end of the silencing assembly(120) is protruded with a first cylinder structure (123) for exhausting; the second connecting end (213) is provided with a first annular groove (222) surrounding the first air inlet (221), the first cylinder structure (123) extending into the first annular groove (222) and being in a sealing connection to the first ring groove (222).

3. The silencing device for the compressor of claim 2, wherein the silencing assembly (120) comprises an air guiding cylinder (121) provided with mesh holes on its cylinder wall and a silencing structure (122) wrapped around an outer circumferential side of the air guiding cylinder (121), with one end of the air guiding cylinder (121) protruding from the silencing structure(122) to form the first cylinder structure (123).

4. The silencing device for the compressor of claim 2, wherein an inner circumferential wall of the first annular groove (222) is provided with a first sealing ring (223); and an outer circumferential surface of the first cylindrical structure (123) is in contact with the first sealing ring (223) to form a sealing connection.

5. The silencing device for the compressor of claim 2, wherein an end of the first cylinder structure (123) abuts against a step portion of the first annular groove(222) to limit the silencing assembly (120) from moving towards the check valve (200).

6. The silencing device for the compressor of claim 2, wherein a valve cavity (212) of the valve body (210) extends to the second connecting end (213) to form a second opening structure (215), the second connecting end(213) being provided with a baffle ring (220) for shielding the second opening structured 15), a middle portion of the baffle ring (220) being provided with the first air inlet (221), and a surface of the baffle ring (220) opposite to the silencing assembly(120) being provided with the first annular groove (222).

7. The silencing device for the compressor of claim 6, wherein the second connecting end (213) is provided with a second annular groove (216) surrounding the second opening structure (215) and communicating with10 U1243415the second opening structure (215), the baffle ring (220) being at least partially embedded in the second annular groove (216).

8. The silencing device for the compressor of claim 6, wherein a side of the baffle ring (220) facing away from the silencing assembly (120) is provided with a sealing surface (224) surrounding the first air inlet (221), the valve core assembly (230) being is capable of coming into contact with the sealing surface (224) to seal the first air inlet (221).

9. The silencing device for the compressor of claim 1, wherein the valve core assembly(230) comprises a valve core (231) with a mushroom-head shape and a reset elastic piece(232), the valve core (231) being movably connected withtin the valve cavity (212) of the valve body (210); and the reset elastic piece (232) is connected to the valve core (231) for applying a reset elastic force to the valve core (231).

10. The silencing device for the compressor of claim 9, wherein a middle portion of the valve cavity (212) is provided with a supporting portion (233) ,a middle portion of the supporting portion(233) being provided with a guiding hole(234), wherein one side of the valve core (231) facing away from the first air inlet (221) is provided with a guiding rod (235), the guiding rod (235) being movably connected within the guiding hole (234).

11. The silencing device for the compressor of claim 10, wherein the supporting portion (233) is connected to an inner wall of the valve cavity (212) through a plurality of connecting ribs(236), the plurality of connecting ribs (236) being arranged at intervals along an outer circumference of the supporting portion, exhaust passages being formed between adjacent connecting ribs (236).

12. The silencing device for the compressor of claim 1, wherein the housing (110) has a second air inlet (114), wherin a partition plate (130) with a through hole (131) is arranged in the housing (110), the inner cavity of the housing (110)being divided into an air inlet chamber (115) and a silencing chamber (116) which are communicated with each other through the through hole (131), the air inlet chamber (115) being communicated with the second air inlet(114), the silencing chamber (116) being communicated with the first opening structured 12), and the silencing assembly (120) being arranged in the silencing chamber (116).

13. The silencing device for the compressor of claim 12, wherein the partition plate (130) is provided with an annular protrusion (132) protruding towards the air inlet chamber ( 115) along a periphery of the through hole (131).

14. The silencing device for the compressor of claim 12, wherein a surface of the partition plate (130) facing the silencing chamber (116) is provided with a third annular groove(133) surrounding the through hole (131); an inlet end of the silencing assembly(120) is protruded with a second cylinder structure (124) for air intake, the second cylinder structure (124) extending into the third annular groove (133) and being in a sealing connection with the third annular groove (133).11 U124341515. The silencing device for the compressor of claim 14, wherein an end of the second cylinder structure (124) abuts against a step portion of the third annular groove (133) to limit the silencing assembly (120) from moving towards the partition plate (130).

16. The silencing device for the compressor of claim 1 , wherein a periphery of the first connection end (111) is provided with a first flange plate(113) , wherein a periphery of the second connection end (213) is provided with a second flange plate (214), the first connection end (111) and the second connection end (213) being connected through the first flange plate (113) and the second flange plate (214) .12 U1243415

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