Air compressor with air leakage and noise reduction functions

Abstract

The utility model provides an air compressor with air leakage and noise reduction functions, which is characterized in that a valve body seat is arranged between an air compression mechanism of the air compressor and an air storage container, a pressure relief channel communicated with the air storage container is arranged on the valve body seat, and the pressure relief channel is communicated with a cavity of a compression cylinder through a silencer on the compression cylinder. When air leakage (pressure relief) of the air storage container is carried out, the pressure relief channel only needs to be opened through the pressure relief valve, so that high-pressure air flow in the air storage container sequentially passes through the pressure relief channel, the silencer and the cavity and is finally discharged from the air inlet. Therefore, before the high-pressure air flow enters the cavity of the compression cylinder, the noise generated when the high-pressure air flow flows is eliminated through the silencer, so that sound energy is consumed, the noise generated during pressure relief is reduced, and the problem that the high-pressure air flow generates large noise in the compression cylinder easily in the pressure relief process of the air compressor is effectively solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of air compression equipment, and in particular relates to an air compressor with air leakage and silencing functions. Background Art

[0002] The air compressor used in the automobile air suspension system compresses the input air to provide high-pressure compressed air, and inputs the compressed air into air storage containers such as air tanks or air springs to improve the stability, smoothness and comfort of the car's driving. At present, during the pressure relief process of the air compressor, since the high-pressure gas in the air storage container is released quickly and instantly into the limited space in the compression cylinder, it generally produces a large noise, which seriously affects the user experience. Utility Model Content

[0003] Based on the above problems existing in the prior art, the purpose of the embodiment of the utility model is to provide an air compressor with an air release and silencing function to solve the technical problem that the air compressor in the prior art is prone to produce loud noise in the compression cylinder during the pressure release process.

[0004] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is to provide an air compressor with air-deflation and silencing function, comprising:

[0005] An air compression mechanism comprises a compression cylinder and a piston assembly arranged in the compression cylinder, wherein a cavity is arranged inside the compression cylinder, an air outlet and an air inlet for introducing external air into the compression cylinder are arranged on the compression cylinder, and the air inlet is communicated with the cavity;

[0006] An air storage container, used for storing compressed air, the air storage container being in communication with the air outlet;

[0007] A valve body seat, connected between the air compression mechanism and the gas storage container, the valve body seat is provided with a pressure relief channel for pressure relief, and the pressure relief channel is communicated with the gas storage container;

[0008] A pressure relief valve, used for selectively opening or closing the pressure relief channel, wherein the pressure relief valve is installed on the pressure relief channel;

[0009] a switch valve, used for selectively opening or closing the air outlet, wherein the switch valve is disposed on the compression cylinder; and

[0010] a muffler, disposed on the compression cylinder and connecting the pressure relief passage and the cavity;

[0011] Wherein, when the air compression mechanism compresses gas, the pressure relief valve closes the pressure relief channel, and the switch valve opens the air outlet, so that the compressed air compressed by the air compression mechanism is input into the gas storage container through the air outlet; when the gas storage container is deflated, the switch valve closes the air outlet, and the pressure relief valve opens the pressure relief channel, and the high-pressure airflow in the gas storage container passes through the pressure relief channel, the muffler and the cavity in sequence, and is discharged from the air inlet.

[0012] Furthermore, the silencer is a tubular silencer whose pipeline flow area gradually decreases along the airflow direction.

[0013] Furthermore, the pressure relief valve is a straight-through solenoid valve.

[0014] Furthermore, the compression cylinder is provided with a positioning hole for accommodating and positioning the muffler, and the positioning hole is a stepped hole.

[0015] Furthermore, the air compressor with air deflation silencer function also includes a silencer assembly and an air intake pipe connected to the silencer assembly, the silencer assembly is provided with a labyrinth silencer channel for changing the gas flow path and / or gas flow rate during air intake and / or air deflation to achieve noise reduction, the air intake pipe is connected to the labyrinth silencer channel, and the air inlet is connected to the labyrinth silencer channel.

[0016] Furthermore, the silencer assembly includes a first silencer and a second silencer, a silencer groove is recessed on a surface of the first silencer facing away from the air intake pipe, a silencer sleeve connected to the air intake pipe is provided at the center of the silencer groove, an annular silencer groove is formed between the inner side wall of the silencer groove and the outer side wall of the silencer sleeve, a first guide side wall, a second guide side wall and a third guide side wall are provided inside the annular silencer groove, the first guide side wall is arranged around the silencer sleeve, the second guide side wall is arranged around the first guide side wall, the third guide side wall is arranged around the second guide side wall, and at least two guide side walls are provided on the third guide side wall A confluence port, at least two first guide ports are provided on the first guide side wall, at least two second guide ports are provided on the second guide side wall, and at least four turning ports are provided on the third guide side wall, wherein the turning ports are located between the corresponding second guide ports and the confluence port, the second silencer cover is arranged on the notch of the annular silencer groove, and a plurality of exhaust holes are respectively provided on the upper and lower sides of the second silencer, wherein the positions of the plurality of exhaust holes correspond to the positions of the two confluence ports, so as to form a labyrinth-type silencer channel between the first silencer and the second silencer for changing the gas flow path and / or the gas flow rate to achieve noise reduction.

[0017] Furthermore, the first flow guide side wall is in the form of two symmetrical arc-shaped side walls, and a first flow guide port is formed between ends of two adjacent symmetrical arc-shaped side walls.

[0018] Furthermore, the second flow guide side walls are roughly two symmetrical arc-shaped side walls, and a second flow guide port is formed between the ends of the two adjacent symmetrical arc-shaped side walls.

[0019] Furthermore, the switch valve is a first air outlet valve plate.

[0020] Furthermore, the air compression mechanism also includes a driving mechanism for driving the piston assembly to move, and a first piston cylinder and a second piston cylinder are also provided inside the compression cylinder, the cavity is located between the first piston cylinder and the first piston cylinder, and the piston assembly includes a first piston slidably arranged in the first piston cylinder, a second piston slidably arranged in the second piston cylinder, and a driving part connecting the first piston and the second piston, and the driving part is connected to the driving mechanism.

[0021] Compared with the prior art, the above one or more technical solutions in the embodiments of the present invention have at least one of the following beneficial effects:

[0022] The air compressor with air deflation and silencer function in the embodiment of the utility model is provided with a valve body seat between the air compression mechanism of the air compressor and the air storage container, and a pressure relief channel connected to the air storage container is provided on the valve body seat, and the pressure relief channel is connected to the cavity of the compression cylinder through the silencer on the compression cylinder. When the air storage container is deflated (pressure relieved), it is only necessary to open the pressure relief channel through the pressure relief valve, so that the high-pressure airflow in the air storage container passes through the pressure relief channel, the silencer and the cavity in sequence, and is finally discharged from the air inlet. In this way, before the high-pressure airflow enters the cavity of the compression cylinder, the noise generated when the high-pressure airflow flows is eliminated by the silencer, thereby consuming sound energy, and then reducing the noise generated during the pressure relief, effectively overcoming the problem that the pressure relief airflow is prone to generate a large noise in the compression cylinder during the pressure relief process of the air compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0024] Figure 1 A schematic cross-sectional view of an air compressor with air deflation and silencing function provided by an embodiment of the utility model;

[0025] Figure 2 An exploded view of an air compressor with air deflation and silencing function provided by an embodiment of the utility model;

[0026] Figure 3 A schematic diagram of the three-dimensional structure of a compression cylinder provided in an embodiment of the utility model;

[0027] Figure 4 An assembly diagram of a compression cylinder and a switch valve provided in an embodiment of the utility model;

[0028] Figure 5 An exploded view of a compression cylinder provided by an embodiment of the utility model;

[0029] Figure 6 A schematic diagram of the three-dimensional structure of a cylinder head provided in an embodiment of the utility model;

[0030] Figure 7 An assembly diagram of a cylinder head and a second exhaust valve plate provided in an embodiment of the utility model;

[0031] Figure 8 An exploded view of a compression cylinder and a muffler assembly provided by an embodiment of the utility model;

[0032] Fig. 9 An exploded view of a first piston and a first intake valve plate provided in an embodiment of the utility model;

[0033] Fig.10 A three-dimensional structural schematic diagram of a piston assembly provided in an embodiment of the utility model;

[0034] Fig.11 A schematic cross-sectional view of a muffler provided in an embodiment of the utility model;

[0035] Fig.12 A schematic diagram of the structure of a first muffler provided in an embodiment of the utility model;

[0036] Fig.13 A schematic diagram of the three-dimensional structure of an air compressor with air-deflation and silencing function provided by another embodiment of the utility model;

[0037] Fig.14 A three-dimensional structural schematic diagram of an air compressor with air leakage and silencing function provided by another embodiment of the utility model.

[0038] Among them, the reference numerals in the figure are:

[0039] 1-air compression mechanism; 11-compression cylinder; 111-cylinder body; 112-cylinder head; 113-bottom opening; 12-piston assembly; 121-first piston; 122-second piston; 123-driving part; 13-cavity; 14-air outlet; 15-air inlet; 16-first piston cylinder; 17-second piston cylinder;

[0040] 2-valve body seat; 21-pressure relief channel; 3-pressure relief valve;

[0041] 4- switch valve; 5- muffler; 6- positioning hole;

[0042] 7-silencing assembly; 71-first silencer; 711-silencing groove; 712-silencing sleeve; 713-first guide side wall; 714-second guide side wall; 715-third guide side wall; 716-confluence port; 717-first guide port; 718-second guide port; 719-turning port; 72-second silencer; 721-exhaust hole;

[0043] 8-intake pipe; 9-driving mechanism; 10-intake hole; 20-first intake valve plate; 30-first outlet passage; 40-second outlet valve plate; 50-middle passage; 60-intake passage; 70-second intake valve plate. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0045] It should be noted that when an element is referred to as being "connected to" or "set on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element. In addition, the terms "first", "second", "third" and "fourth" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first", "second", "third" and "fourth" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more, unless otherwise clearly specified and specifically defined. In the description of the utility model, it should be noted that, unless otherwise clearly specified and defined, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0046] Reference throughout the specification to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, when the phrases "in one embodiment," "in some embodiments," or "in some of these embodiments" appear in various places throughout the specification, not all references are to the same embodiment. Furthermore, in one or more embodiments, the particular features, structures, or characteristics may be combined in any suitable manner.

[0047] Please also read Figures 1 to 14The air compressor with air deflation and silencing function provided by the embodiment of the utility model is now described. The air compressor with air deflation and silencing function provided by the embodiment of the utility model comprises an air compression mechanism 1, an air storage container, a valve body seat 2, a pressure relief valve 3, a switch valve 4 and a muffler 5. The air compression mechanism 1 comprises a compression cylinder 11 and a piston assembly 12 arranged in the compression cylinder 11. A cavity 13 is arranged inside the compression cylinder 11. An air outlet 14 and an air inlet 15 for introducing external air into the compression cylinder 11 are arranged on the compression cylinder 11. The air inlet 15 is connected to the cavity 13. The air storage container is used to store compressed air, and the air storage container is connected to the air outlet 14. The valve body seat 2 is connected between the air compression mechanism 1 and the air storage container. A pressure relief channel 21 for pressure relief is arranged on the valve body seat 2, and the pressure relief channel 21 is connected to the air storage container. The pressure relief valve 3 is used to selectively open or close the pressure relief channel 21. The pressure relief valve 3 is installed on the pressure relief channel 21. The switch valve 4 is used to selectively open or close the air outlet 14. The switch valve 4 is a first air outlet valve plate provided on the compression cylinder 11. The muffler 5 is provided on the compression cylinder 11 and connects the pressure relief channel 21 with the cavity 13. When the air compression mechanism 1 compresses the gas, the pressure relief valve 3 closes the pressure relief channel 21, and the switch valve 4 opens the air outlet 14, so that the compressed air compressed by the air compression mechanism 1 can be input into the gas storage container through the air outlet 14 for storage. When the gas storage container is deflated (pressure released), the switch valve 4 closes the air outlet 14, and the pressure relief valve 3 opens the pressure relief channel 21. The high-pressure airflow in the gas storage container passes through the pressure relief channel 21, the muffler 5 and the cavity 13 in sequence, and is discharged from the air inlet 15. Before the high-pressure airflow enters the cavity 13 of the compression cylinder 11, the noise generated when the high-pressure airflow flows is eliminated by the muffler 5, thereby consuming sound energy, thereby reducing the noise generated when the pressure is released.

[0048] Compared with the prior art, the air compressor with deflation and silencing function provided by the embodiment of the utility model is provided with a valve body seat 2 between the air compression mechanism 1 of the air compressor and the air storage container, and a pressure relief channel 21 connected to the air storage container is provided on the valve body seat 2, and the pressure relief channel 21 is connected to the cavity 13 of the compression cylinder 11 through the muffler 5 on the compression cylinder 11. When the air storage container is deflated (pressure relieved), it is only necessary to open the pressure relief channel 21 through the pressure relief valve 3, so that the high-pressure airflow in the air storage container passes through the pressure relief channel 21, the muffler 5 and the cavity 13 in sequence, and finally discharged from the air inlet 15. In this way, before the high-pressure airflow enters the cavity 13 of the compression cylinder 11, the noise generated when the high-pressure airflow flows is eliminated by the muffler 5, thereby consuming sound energy, thereby achieving noise reduction, and effectively overcoming the problem that the pressure relief airflow is easy to generate a large noise in the compression cylinder 11 during the pressure relief process of the air compressor.

[0049] Please refer to Fig.11In some of the embodiments, the silencer 5 is a tubular silencer 5 in which the pipe flow area gradually decreases along the airflow direction. The tubular silencer 5 reduces the pressure pulsation and noise level, causing the high-speed high-pressure airflow to reflect or interfere, thereby consuming sound energy and reducing noise.

[0050] In some of the embodiments, the pressure relief valve 3 is a straight-through solenoid valve. Since the straight-through solenoid valve can be normally started under vacuum, negative pressure and zero pressure, the response time of the pressure relief valve 3 to control the pressure relief of the pressure relief channel 21 can be accelerated.

[0051] Please refer to Figure 2 , Figure 3 and Figure 4 In some of the embodiments, a positioning hole 6 for accommodating and positioning the muffler 5 is provided on the compression cylinder 11. The positioning hole 6 is a stepped hole. The muffler 5 is accommodated and positioned through the positioning hole 6, thereby enhancing the stability of the positioning installation of the muffler 5.

[0052] Please refer to Figure 1 , Figure 2 and Fig.12 In some embodiments, the air compressor with deflation silencing function further includes a silencing assembly 7 and an air intake pipe 8 connected to the silencing assembly 7. The silencing assembly 7 is provided with a labyrinth silencing channel for changing the gas flow path and / or gas flow rate during air intake and / or deflation to achieve noise reduction. The air intake pipe 8 is connected to the labyrinth silencing channel, and the air intake port 15 is connected to the labyrinth silencing channel. Since the silencing assembly 7 is provided at the air intake port 15 of the compression cylinder 11, and the labyrinth silencing channel for changing the gas flow path and / or gas flow rate during air intake and / or deflation to achieve noise reduction is provided on the silencing assembly 7, before the air flow in the cavity 13 of the compression cylinder 11 is discharged through the air intake pipe 8, the noise generated when the high-pressure air flow flows is offset by the labyrinth silencing channel, thereby consuming sound energy, thereby achieving the reduction of the noise generated during pressure relief, and effectively overcoming the problem of the air compressor generating a large noise during the pressure relief process. It should be noted that, since the pressure relief and air intake processes share the air intake pipe 8, the layout of the air intake pipe 8 and the air relief pipe can be simplified to save space, which is conducive to reducing the overall volume of the air compressor. When the air compression mechanism 1 compresses the gas, the external air can enter the cavity 13 of the compression cylinder 11 through the air intake pipe 8, the pressure relief valve 3 closes the pressure relief channel 21, and the switch valve 4 opens the air outlet 14, so that the compressed air compressed by the air compression mechanism 1 can be input into the air storage container through the air outlet 14 for storage. In the process of air intake, the noise generated during air intake is also offset by the labyrinth-type silencer channel, thereby consuming sound energy, thereby reducing the noise generated during air intake.

[0053] Please refer to Figure 1 , Figure 2 and Fig.12In some embodiments, the silencer assembly 7 includes a first silencer 71 and a second silencer 72. A silencer groove 711 is concavely provided on a surface of the first silencer 71 facing away from the air intake pipe 8. A silencer sleeve 712 communicating with the air intake pipe 8 is provided at the center of the silencer groove 711. An annular silencer groove 711 is formed between the inner side wall of the silencer groove 711 and the outer side wall of the silencer sleeve 712. A first guide side wall 713, a second guide side wall 714 and a third guide side wall 715 are provided inside the annular silencer groove 711. The first guide side wall 713 is arranged around the silencer sleeve 712, the second guide side wall 714 is arranged around the first guide side wall 713, the third guide side wall 715 is arranged around the second guide side wall 714, and the third guide side wall 715 is provided on the At least two confluence ports 716 are provided, at least two first guide ports 717 are provided on the first guide side wall 713, at least two second guide ports 718 are provided on the second guide side wall 714, and at least four turning ports 719 are provided on the third guide side wall 715. The turning ports 719 are located between the corresponding second guide ports 718 and the confluence ports 716. The second silencer 72 is covered on the notch of the annular silencer groove 711, and a plurality of exhaust holes 721 are respectively provided on the upper and lower sides of the second silencer 72. The positions of the plurality of exhaust holes 721 correspond to the positions of the two confluence ports 716, so as to form a labyrinth-type silencer channel between the first silencer 71 and the second silencer 72 for changing the gas flow path and / or gas flow rate to achieve noise reduction.

[0054] Please refer to Figure 2 , Figure 8 and Fig.12 In some embodiments, the first flow guiding side wall 713 is two symmetrical arc-shaped side walls, and a first flow guiding port 717 is formed between the ends of the two adjacent symmetrical arc-shaped side walls. When the decompressed gas flows through different air flow channels and the first flow guiding port 717 in sequence, the air flow noise is offset in the labyrinth-type silencer channel, thereby consuming sound energy and reducing noise.

[0055] Please refer to Figure 2 , Figure 8 and Fig.12 In some embodiments, the second flow guide sidewall 714 is roughly in the form of two symmetrical arc-shaped sidewalls, and a second flow guide port 718 is formed between the ends of the two adjacent symmetrical arc-shaped sidewalls. When the decompressed gas flows through different airflow channels and the second flow guide port 718 in sequence, the airflow noise is offset in the labyrinth-type silencer channel, thereby consuming sound energy and reducing noise.

[0056] Please refer to Figure 1 , Figure 2 and Fig.10In some embodiments, the air compression mechanism 1 further includes a driving mechanism 9 for driving the piston assembly 12 to move. A first piston cylinder 16 and a second piston cylinder 17 are further provided inside the compression cylinder 11. The cavity 13 is located between the first piston cylinder 16 and the first piston cylinder 16. The piston assembly 12 includes a first piston 121 slidably disposed in the first piston cylinder 16, a second piston 122 slidably disposed in the second piston cylinder 17, and a driving portion 123 connecting the first piston 121 and the second piston 122. The driving portion 123 is connected to the driving mechanism 9. The piston assembly 12 is generally axially symmetrical, and the center of mass of the piston assembly 12 is located on the central axis. The compression cylinder 11 includes a cylinder body 111 and a cylinder cover 112. The piston assembly 12 is installed through the bottom opening 113 of the cylinder body 111, and then the bottom opening 113 of the cylinder body 111 is sealed and covered by the cylinder cover 112. The first piston 121 is located at the lower end. The size of the first piston 121 matches the inner side wall of the first piston cylinder 16. The first piston 121 is provided with an air inlet hole 10. A first air inlet valve plate 20 is provided on one side of the air inlet hole 10. The first air inlet valve plate 20 is a one-way valve. When the first air inlet valve plate 20 is subjected to external gas pressure, the first air inlet valve plate 20 opens. At this time, the gas can only be input into the first piston cylinder 16 below. When the external gas is input into the cavity 13 of the cylinder body 111 through the labyrinth-type silencer channel, the gas then enters the air inlet hole 10 on the first piston 121. At this time, the first air inlet valve plate 20 opens under the pressure of the external gas, and the gas enters the first piston cylinder 16 for compression. The size of the second piston 122 matches the inner side wall of the second piston cylinder 17. When the piston assembly 12 is working, the first piston 121 and the second piston 122, driven by the driving mechanism 9, respectively perform piston motion in the first piston cylinder 16 and the second piston cylinder 17 to compress the air. Furthermore, an intermediate passage 50 connecting the first piston cylinder 16 and the second piston cylinder 17 is also provided on the cylinder body 111, and the gas is compressed in the first stage through the first piston cylinder 16, and the gas after the first stage compression is input into the second piston cylinder 17 through the intermediate passage 50 for secondary compression. A first gas outlet channel 30 is provided on the cylinder head 112, and the first gas outlet channel 30 is connected with one end of the intermediate passage 50, and a second gas outlet valve plate 40 is provided at the connecting position of the first gas outlet channel 30 and the intermediate passage 50, and the second gas outlet valve plate 40 is a one-way valve. An intake channel 60 is opened on the top of the second piston cylinder 17, and an air outlet hole 14 is provided on the top of the cylinder body 111 of the compression cylinder, and the air intake channel 60 is connected with the other end of the intermediate passage 50, and a second air intake valve plate 70 is provided on the air intake channel 60, and the second air intake valve plate 70 is a one-way valve. At the same time, a first gas outlet valve plate (switch valve 4) is provided on the gas outlet hole 14, and the first gas outlet valve plate is a one-way valve.When the air compressor is working, external gas is output to the cavity 13 of the cylinder body 111 through the intake pipe 8; at this time, the first piston 121 and the second piston 122 are driven by the driving mechanism 9 to perform piston motion in the first piston cylinder 16 and the second piston cylinder 17 respectively; then the gas enters the intake hole 10 on the first piston 121, and at this time, the first intake valve plate 20 is opened under the pressure of the external gas, and the gas enters the first piston cylinder 16 for compression. After the compression is completed, the gas flows to the middle passage 50 through the first outlet channel 30 on the cylinder head 112 and opens the second outlet valve plate 40, and then enters the intake channel 60 at the top of the second piston cylinder 17, opens the second intake valve plate 70 and enters the second piston cylinder 17 for secondary compression. After the compression is completed, the high-pressure gas is discharged through the outlet hole 14 and the first outlet valve plate is opened.

[0057] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air compressor with air deflation and silencing function, characterized in that: include: An air compression mechanism comprises a compression cylinder and a piston assembly arranged in the compression cylinder, wherein a cavity is arranged inside the compression cylinder, an air outlet and an air inlet for introducing external air into the compression cylinder are arranged on the compression cylinder, and the air inlet is communicated with the cavity; An air storage container, used for storing compressed air, the air storage container being in communication with the air outlet; A valve body seat, connected between the air compression mechanism and the gas storage container, the valve body seat is provided with a pressure relief channel for pressure relief, and the pressure relief channel is communicated with the gas storage container; A pressure relief valve, used for selectively opening or closing the pressure relief channel, wherein the pressure relief valve is installed on the pressure relief channel; A switch valve, used for selectively opening or closing the air outlet, wherein the switch valve is arranged on the compression cylinder; as well as a muffler, disposed on the compression cylinder and connecting the pressure relief passage and the cavity; Wherein, when the air compression mechanism compresses gas, the pressure relief valve closes the pressure relief channel, and the switch valve opens the air outlet, so that the compressed air compressed by the air compression mechanism is input into the gas storage container through the air outlet; when the gas storage container is deflated, the switch valve closes the air outlet, and the pressure relief valve opens the pressure relief channel, and the high-pressure airflow in the gas storage container passes through the pressure relief channel, the muffler and the cavity in sequence, and is discharged from the air inlet.

2. The air compressor with air deflation and silencing function as claimed in claim 1, characterized in that: The silencer is a tubular silencer whose pipeline flow area gradually decreases along the airflow direction.

3. The air compressor with air deflation and silencing function as claimed in claim 1, characterized in that: The pressure relief valve is a straight-through solenoid valve.

4. The air compressor with air deflation and silencing function as claimed in claim 1, characterized in that: The compression cylinder is provided with a positioning hole for accommodating and positioning the muffler, and the positioning hole is a stepped hole.

5. The air compressor with air deflation and silencing function as claimed in claim 1, characterized in that: The air compressor with air deflation silencer function also includes a silencer assembly and an air intake pipe connected to the silencer assembly. The silencer assembly is provided with a labyrinth silencer channel for changing the gas flow path and / or gas flow rate during air intake and / or air deflation to achieve noise reduction. The air intake pipe is connected to the labyrinth silencer channel, and the air inlet is connected to the labyrinth silencer channel.

6. The air compressor with air deflation and silencing function as claimed in claim 5, characterized in that: The silencer assembly includes a first silencer and a second silencer. A silencer groove is recessed on a surface of the first silencer facing away from the air intake pipe. A silencer sleeve connected to the air intake pipe is provided at the center of the silencer groove. An annular silencer groove is formed between the inner side wall of the silencer groove and the outer side wall of the silencer sleeve. A first guide side wall, a second guide side wall and a third guide side wall are provided inside the annular silencer groove. The first guide side wall is arranged around the silencer sleeve, the second guide side wall is arranged around the first guide side wall, the third guide side wall is arranged around the second guide side wall, and at least two converging The first guide side wall is provided with at least two first guide ports, the second guide side wall is provided with at least two second guide ports, and the third guide side wall is also provided with at least four turning ports, the turning ports are located between the corresponding second guide ports and the confluence ports, the second silencer cover is arranged on the notch of the annular silencer groove, and the upper and lower sides of the second silencer are respectively provided with a plurality of exhaust holes, and the positions of the plurality of exhaust holes correspond to the positions of the two confluence ports, so as to form a labyrinth-type silencer channel between the first silencer and the second silencer for changing the gas flow path and / or gas flow rate to achieve noise reduction.

7. The air compressor with air deflation and silencing function as claimed in claim 6, characterized in that: The first flow guiding side wall is in the form of two symmetrical arc-shaped side walls, and a first flow guiding port is formed between the ends of the two adjacent symmetrical arc-shaped side walls.

8. The air compressor with air deflation and silencing function as claimed in claim 6, characterized in that: The second flow guiding side walls are roughly in the form of two symmetrical arc-shaped side walls, and a second flow guiding port is formed between the ends of the two adjacent symmetrical arc-shaped side walls.

9. The air compressor with air deflation and silencing function as claimed in claim 1, characterized in that: The switch valve is a first air outlet valve plate.

10. The air compressor with air leakage and silencer function according to any one of claims 1 to 9, characterized in that: The air compression mechanism also includes a driving mechanism for driving the piston assembly to move. A first piston cylinder and a second piston cylinder are also provided inside the compression cylinder. The cavity is located between the first piston cylinder and the second piston cylinder. The piston assembly includes a first piston slidably disposed in the first piston cylinder, a second piston slidably disposed in the second piston cylinder, and a driving portion connecting the first piston and the second piston, and the driving portion is connected to the driving mechanism.

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