Linear air compressor

Abstract

The present invention discloses a linear air compressor, comprising: a first housing configured to have a long rectangular structure; the first piston and the second piston are respectively arranged at two ends of the first shell; the motor is used for driving the first piston and the second piston to move; the water filtering device is used for dehumidifying the compressed air; the cooling fan is arranged at one end of the first shell; a first compression cavity is formed in one end of the first shell, a second compression cavity is formed in the other end of the first shell, the first piston is arranged in the first compression cavity, the second piston is arranged in the second compression cavity, the first compression cavity is communicated with the second compression cavity, and the motor drives the first piston and the second piston to move in the same direction; the compressor shell is arranged to be in a regular shape, so that the mounting space is saved, and the compressor shell is suitable for the aviation field.

Description

Technical Field

[0001] The invention belongs to the technical field of air compressors, and in particular relates to a linear air compressor. Background Art

[0002] An air compressor is a device used to compress gas. The structure of an air compressor is similar to that of a water pump. Most air compressors are reciprocating piston type, rotating blades or rotating screws. The advantages of piston air compressors are simple structure, long service life, and easy to achieve large capacity and high pressure output. In order to make the transmission more natural, the shell of the existing compressor is made into various shapes, which makes the compressor subject to mechanical restrictions during installation, especially in the aviation field. The installation space on the aircraft is small, and conventional compressors cannot be installed normally, and the compressor is an indispensable part of the aircraft. Summary of the invention

[0003] The content of this application is used to introduce concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this application is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0004] In order to overcome the deficiencies of the prior art, the present invention provides a linear air compressor.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a linear air compressor, comprising: a first shell, which is constructed into a long rectangular structure; a first piston and a second piston, which are respectively arranged at two ends of the first shell; a motor, which is used to drive the first piston and the second piston to move; a water filter device, which dehumidifies the compressed air; a cooling fan, which is arranged at one end of the first shell; a first compression chamber is provided at one end of the first shell, and a second compression chamber is provided at the other end, the first piston is arranged in the first compression chamber, the second piston is arranged in the second compression chamber, the first compression chamber and the second compression chamber are connected, and the motor drives the first piston and the second piston to move in the same direction.

[0006] Furthermore, a transmission chamber is provided on the first shell, and the transmission chamber is located between the first compression chamber and the second compression chamber. A turntable is provided in the transmission chamber, and the turntable is connected to the output shaft of the motor. A first connecting rod is eccentrically connected to the turntable, and the first piston and the second piston are respectively provided at both ends of the first connecting rod.

[0007] Furthermore, the water filtering device includes: a second shell, arranged on the first shell; an inner shell, arranged in the second shell; a plurality of water filtering layers, arranged in the inner shell; a first partition, dividing the inner shell into an upper chamber and a lower chamber; water filtering layers are arranged in both the upper chamber and the lower chamber, there is a gap between the inner shell and the inner wall of the second shell, a plurality of connecting springs are arranged on the side wall of the inner shell, and one end of the connecting spring is fixedly connected to the inner wall of the second shell.

[0008] Furthermore, an air inlet and an air outlet are provided on the second shell, a movable block is provided in the second shell, and a first connecting pipe connecting the air inlet and the lower cavity and a second connecting pipe connecting the air outlet and the upper cavity are provided on the movable block.

[0009] Furthermore, a first pressing plate, a second pressing plate and a first supporting plate are provided in the lower chamber, the first pressing plate and the first supporting plate are respectively provided at two ends of the lower chamber, the second pressing plate is a plurality of pieces provided between the first pressing plate and the first supporting plate, and the second pressing plate and the first supporting plate are both porous plates; a third pressing plate, a fourth pressing plate and a second supporting plate are provided in the upper chamber, the third pressing plate and the second supporting plate are respectively provided at two ends of the upper chamber, the fourth pressing plate is a plurality of pieces provided between the third pressing plate and the second supporting plate, and the fourth pressing plate and the second supporting plate are both porous plates.

[0010] Furthermore, a first through hole is provided on the first pressure plate, a second through hole is provided on the third pressure plate, the first connecting tube is inserted in the first through hole, and the second connecting tube is inserted in the second through hole; a first through groove and a second through groove are provided on the movable block, one end of the first connecting tube is inserted in the first through groove, and one end of the second connecting tube is inserted in the second through groove, the cross-section of the first through groove is larger than the cross-section of the first through hole, the cross-section of the second through groove is larger than the cross-section of the second through hole, and end plates are respectively provided at one end of the first connecting tube and the second connecting tube.

[0011] Furthermore, the movable block is provided with a first push block and a second push block, the first push block is provided on one side of the first pressure plate, and the second push block is provided on one side of the third pressure plate; the third pressure plate is provided with a first movable cavity communicated with the second through hole, and the first movable plate is provided in the first movable cavity, and when the second push block pushes the pressure plate to move, the first movable plate moves into the second through hole to close the second through hole.

[0012] Furthermore, a first movable groove is provided on the side wall of the first movable cavity, a second connecting rod is rotatably connected to the inner wall of the first movable groove, a third connecting rod is hinged at one end of the second connecting rod, one end of the third connecting rod is hinged to the first movable plate, the second push block is located on one side of the second connecting rod, a protrusion is provided on the first movable plate, a first return spring is provided on the protrusion, and one end of the first return spring rests on the inner wall of the first movable groove.

[0013] Furthermore, a protruding rod is provided on the top of the upper cavity, a first groove corresponding to the protruding rod is provided on the third pressure plate, a second groove corresponding to the protruding rod is provided on the fourth pressure plate, a first slider is provided in the first groove, a first sliding groove for movement of the first slider is provided on the protruding rod, and a second return spring is provided on the first slider; a second slider is provided in the second groove, a second sliding groove for movement of the second slider is provided on the upper row of the protrusion, and a third return spring is provided on the second slider.

[0014] Furthermore, the movable block is provided with a second movable cavity communicated with the first through groove, and the second movable cavity is provided with a second movable plate and a first electromagnet, and the first electromagnet can drive the second movable plate to move in the second movable cavity; the second electromagnet is provided on the inner wall of the first shell, and a magnetic block is provided on the side wall of the inner shell.

[0015] The invention is beneficial in that it provides a linear air compressor which saves installation space and is applicable to the aviation field. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The illustrative embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application.

[0017] In addition, throughout the drawings, the same or similar reference numerals represent the same or similar elements. It should be understood that the drawings are schematic and that the components and elements are not necessarily drawn to scale.

[0018] In the attached picture:

[0019] Figure 1 It is a schematic structural diagram of a linear air compressor in one embodiment of the present invention.

[0020] Figure 2 for Figure 1 A first housing cross-sectional view of a linear air compressor in the illustrated embodiment.

[0021] Figure 3 for Figure 1 A cross-sectional view of a water filter for a linear air compressor in the illustrated embodiment.

[0022] Figure 4 for Figure 3 Enlarged view of point A in .

[0023] Figure 5 for Figure 3 Enlarged view of point B in .

[0024] Figure 6 for Figure 1 A cross-sectional view of a second housing of the linear air compressor in the illustrated embodiment.

[0025] Figure 7 for Figure 1 A cross-sectional view of a second movable plate of the linear air compressor in the illustrated embodiment.

[0026] Figure 8 for Figure 1 A cross-sectional view of a first movable plate of a linear air compressor in the illustrated embodiment.

[0027] Fig. 9 for Figure 1 A cross-sectional view of a fluid delivery tube of a linear air compressor in the illustrated embodiment.

[0028] Fig.10 for Fig. 9 Enlarged view of point C in the figure.

[0029] Fig.11 It is a schematic structural diagram of a linear air compressor in another embodiment of the present invention.

[0030] The meanings of the reference numerals in the figures are as follows:

[0031] 100, first housing; 101, first compression chamber; 102, second compression chamber; 300, cooling fan; 400, water filter; 401, second housing; 402, inner housing; 4021, first water guide groove; 4022, second water guide groove; 403, water filter layer; 404, second support plate; 405, fourth pressure plate; 406, first support plate; 407, second pressure plate; 408, first pressure plate; 409, movable block; 410, first partition plate; 411, second partition plate; 412, fourth return spring; 413, first push block; 414, Drain pipe; 415, third pressure plate; 416, second push block; 417, convex rod; 418, first slider; 419, second return spring; 420, connecting spring; 421, first movable plate; 4211, convex block; 4212, first return spring; 422, second connecting rod; 423, third connecting rod; 424, supporting block; 425, second slider; 426, third return spring; 427, second electromagnet; 428, first connecting pipe; 429, second connecting pipe; 430, end plate; 431, second movable plate; 432, water pipe. DETAILED DESCRIPTION

[0032] Embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although certain embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as being limited to the embodiments set forth herein. On the contrary, these embodiments are provided to provide a more thorough and complete understanding of the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not intended to limit the scope of protection of the present disclosure.

[0033] It should also be noted that, for ease of description, only the parts related to the invention are shown in the drawings. In the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0034] It should be noted that the concepts such as "first" and "second" mentioned in the present disclosure are only used to distinguish different devices, modules or units, and are not used to limit the order or interdependence of the functions performed by these devices, modules or units.

[0035] It should be noted that the modifications of "one" and "plurality" mentioned in the present disclosure are illustrative rather than restrictive, and those skilled in the art should understand that unless otherwise clearly indicated in the context, it should be understood as "one or more".

[0036] The names of the messages or information exchanged between multiple devices in the embodiments of the present disclosure are only used for illustrative purposes and are not used to limit the scope of these messages or information.

[0037] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0038] like Figure 1-10 As shown, a linear air compressor comprises a first housing 100, a first piston, a second piston, a motor, a water filter 400 and a cooling fan 300: the first housing 100 is constructed into a long rectangular structure; the motor is used to drive the first piston and the second piston to move, and the motor is installed at the top of the first housing; the water filter 400 dehumidifies the compressed air; the cooling fan 300 is arranged at one end of the first housing 100; a first compression chamber 101 is arranged at one end of the first housing 100, and a second compression chamber 102 is arranged at the other end, the first piston is arranged in the first compression chamber 101, and the second piston is arranged in the second compression chamber 102, the first compression chamber 101 and the second compression chamber 102 are connected, and the motor drives the first piston and the second piston to move in the same direction ... 00 is arranged at one end of the long rectangular first shell 100, so that the airflow blown by the cooling fan 300 can pass through the entire first shell 100, extend the cooling air duct of the compressor, and improve the cooling effect on the compressor; by making the first shell 100 into a long rectangular structure, the volume of the compressor is greatly reduced, making the compressor shape more regular, so that the compressor can be installed in a smaller installation space, such as the installation position on an airplane, to meet the needs of installing the compressor in a specific place; the air first enters the first compression chamber 101 for the first stage of compression, and the air compressed by the first piston enters the second compression chamber 102 for the second stage of compression, and the air after the second stage of compression enters the water filter device 400 to filter out the water vapor in the compressed air to obtain dry compressed air.

[0039] The air pressure after being compressed by the compressor of the present application can reach 30MPa, and the present application controls the volume of the first shell 100 to reduce the volume of the compressor, thereby lowering the center of gravity of the compressor and making the aircraft operation more stable; the present application can also be installed on wings and missile launchers, and has a wide range of applicable scenarios.

[0040] A transmission chamber is provided on the first shell 100, and the transmission chamber is between the first compression chamber 101 and the second compression chamber 102. A turntable is provided in the transmission chamber, and the turntable is connected to the output shaft of the motor. A first connecting rod is eccentrically connected to the turntable, and the first piston and the second piston are respectively provided at two ends of the first connecting rod; when the turntable rotates, it drives the first connecting rod to move, and the first connecting rod drives the first piston and the second piston to move in the same direction, so that the first compression chamber 101 and the second compression chamber 102 are compressed alternately, ensuring that the air compressed in the first compression chamber 101 can enter the second compression chamber 102 and continue to be compressed, thereby improving the stability of the compressor.

[0041] Furthermore, the water filter device 400 includes a second shell 401, an inner shell 402, a plurality of water filter layers 403 and a first partition 410: the second shell 401 is arranged on the first shell 100; the inner shell 402 is arranged in the second shell 401; the water filter layer 403 is arranged in the inner shell 402; the first partition 410 divides the inner shell 402 into an upper cavity and a lower cavity; the upper cavity and the lower cavity are both provided with a water filter layer 403, and the water filter layer 403 is made of absorbent cotton, and the inner shell There is a gap between the inner shell 402 and the inner wall of the second shell 401, and a plurality of connecting springs 420 are provided on the side wall of the inner shell 402, one end of the connecting spring 420 is fixedly connected to the inner wall of the second shell 401; a gap is also left between the end face of the inner shell 402 and the end face of the second shell 401, and the airflow in the lower cavity enters the upper cavity through the gap, so that the airflow passes through all the water filtering layers 403 in the lower cavity and the upper cavity, thereby extending the water filtering channel of the airflow and improving the dehumidification effect of the airflow.

[0042] The second shell 401 is provided with an air inlet and an air outlet. A movable block 409 is provided inside the second shell 401. The movable block 409 is provided with a first connecting pipe 428 connecting the air inlet with the lower cavity and a second connecting pipe 429 connecting the air outlet with the upper cavity.

[0043] A first pressing plate 408, a second pressing plate 407 and a first supporting plate 406 are provided in the lower chamber. The first pressing plate 408 and the first supporting plate 406 are respectively provided at two ends of the lower chamber. The second pressing plate 407 is composed of a plurality of pieces provided between the first pressing plate 408 and the first supporting plate 406. Both the second pressing plate 407 and the first supporting plate 406 are porous plates. The water filtering layer 403 in the lower chamber is located between the first pressing plate 408 and the second pressing plate 407, between the second pressing plate 407 and the second pressing plate 407, and between the second pressing plate 407 and the first supporting plate 406. A third pressing plate 415, a fourth pressing plate 405 and a second supporting plate 404 are provided in the upper chamber. The third pressing plate 415 and the second supporting plate 404 are respectively provided at two ends of the upper chamber. The fourth pressing plate 405 is a plurality of plates provided between the third pressing plate 415 and the second supporting plate 404. Both the fourth pressing plate 405 and the second supporting plate 404 are porous plates. The water filtering layer 403 in the upper chamber is located between the third pressing plate 415 and the fourth pressing plate 405, between the fourth pressing plate 405 and the fourth pressing plate 405, and between the fourth pressing plate 405 and the second supporting plate 404.

[0044] A first through hole is provided on the first pressing plate 408, a second through hole is provided on the third pressing plate 415, the first connecting tube 428 is inserted in the first through hole, and the second connecting tube 429 is inserted in the second through hole; a first through slot and a second through slot are provided on the movable block 409, one end of the first connecting tube 428 is inserted in the first through slot, and one end of the second connecting tube 429 is inserted in the second through slot, the cross section of the first through slot is larger than the cross section of the first through hole, and the cross section of the second through slot is larger than the cross section of the second through hole, one end of the first connecting tube 428 and the second connecting tube 429 are respectively provided with end plates 430, the end plates 430 are attached to the side wall of the movable block 409 to close the gap between the first through slot and the first connecting tube 428 and the gap between the second through slot and the second connecting tube 429, and by setting the first through slot and the second through slot, the airflows in the upper and lower cavities will not be mixed when the inner shell 402 moves in the second shell 401.

[0045] The movable block 409 is provided with a first push block 413 and a second push block 416. The first push block 413 is provided on one side of the first pressure plate 408, and the second push block 416 is provided on one side of the third pressure plate 415. The third pressure plate 415 is provided with a first movable cavity communicated with the second through hole, and the first movable plate 421 is provided in the first movable cavity. When the second push block 416 pushes the pressure plate to move, the first movable plate 421 moves into the second through hole to close the second through hole.

[0046] A first movable groove is provided on the side wall of the first movable cavity, and a second connecting rod 422 is rotatably connected to the inner wall of the first movable groove. A third connecting rod 423 is hinged at one end of the second connecting rod 422, and one end of the third connecting rod 423 is hinged to the first movable plate 421. The second push block 416 is located at one side of the second connecting rod 422, a protrusion 4211 is provided on the first movable plate 421, and a first return spring 4212 is provided on the protrusion 4211. One end of the first return spring 4212 rests on the inner wall of the first movable groove, and a support block 424 is provided on the inner wall of the first movable groove. The support block 424 is located at one side of the second connecting rod 422.

[0047] A protruding rod 417 is provided at the top of the upper cavity, a first groove corresponding to the protruding rod 417 is provided on the third pressure plate 415, a second groove corresponding to the protruding rod 417 is provided on the fourth pressure plate 405, a first slider 418 is provided in the first groove, a first sliding groove for movement of the first slider 418 is provided on the protruding rod 417, and a second return spring 419 is provided on the first slider 418; a second slider 425 is provided in the second groove, a second sliding groove for movement of the second slider 425 is provided on the upper row of the protruding block 4211, and a third return spring 426 is provided on the second slider 425; a protruding rod 417 is also provided at the top of the lower cavity, the structure of the third pressure plate 415 is the same as that of the first pressure plate 408, and the structure of the fourth pressure plate 405 is the same as that of the second pressure plate 407.

[0048] A second movable cavity communicated with the first through groove is provided on the movable block 409, and a second movable plate 431 and a first electromagnet are provided in the second movable cavity. The first electromagnet can drive the second movable plate 431 to move in the second movable cavity, and the first connecting tube 428 can be deformed under the squeezing of the second movable plate 431 to close the first connecting tube 428; a second electromagnet 427 is provided on the inner wall of the first shell 100, and a magnetic block is provided on the side wall of the inner shell 402.

[0049] A second partition plate 411 is provided at one end of the second shell 401, and a second movable groove corresponding to the second partition plate 411 is provided on the movable block 409. The second partition plate 411 separates the air inlet and the air outlet to prevent air from entering from the air inlet and directly flowing out from the air outlet; a fourth return spring 412 is provided on the movable block 409, and one end of the fourth return spring 412 is fixedly connected to the end face of the second shell 401.

[0050] A first water diversion groove 4021 is provided on the first partition plate 410, and a second water diversion groove 4022 is provided at the bottom of the inner shell 402. The bottoms of the first water diversion groove 4021 and the second water diversion groove 4022 are both inclined, and a water pipe 432 connecting the first water diversion groove 4021 and the second water diversion groove 4022 is provided on the side wall of the lower cavity. A drainage pipe is provided at the bottom of the second water diversion groove 4022, and the drainage pipe passes through the bottom of the first shell 100.

[0051] The compressed air enters the second shell 401 from the air inlet, and the air enters the lower cavity through the first connecting pipe 428. The airflow passes through the water filter layer 403 in the lower cavity and flows to one end of the second shell 401. The airflow enters the upper cavity through the gap between the inner shell 402 and the inner wall of the second shell 401. The airflow passes through the water filter layer 403 in the upper cavity again. The water filter layer 403 in the upper and lower cavities is set to extend the dehumidification channel of the airflow, effectively remove water vapor in the airflow, and the dehumidified air flows out from the air outlet.

[0052] After the water vapor is absorbed on the water filter layer 403, it is liquefied. The water droplets move downward under the action of gravity. The first water guide groove 4021 and the second water guide groove 4022 guide the water droplets to the drain pipe 414 to discharge the waste water. When there are many water droplets on the water filter layer 403, the water droplets on the water filter layer 403 can also be cleaned by manual operation. The specific operation method is as follows: the first electromagnet is energized to drive the second movable plate 431 to move the plate, and the second movable plate 431 squeezes the first connecting pipe 428 down. The first connecting pipe 428 is closed, and the air inlet The air flow is still passed, and the air pressure on one side of the movable block 409 increases, pushing the movable block 409 to move toward the inner shell 402. The second push block 416 abuts against the second connecting rod 422 to rotate the second connecting rod 422 and the third connecting rod 423. The third connecting rod 423 pushes the first movable plate 421 to move to the second through hole to close the second through hole. At the same time, the first push block 413 pushes the second connecting rod 422 on the first pressure plate 408 to rotate, and the first movable plate 421 on the first pressure plate 408 closes the first through hole. After the movable plate 421 cannot move, the first pressing plate 408 and the third pressing plate 415 move to one end of the lower cavity and the upper cavity respectively. When the first pressing plate 408 and the third pressing plate 415 squeeze the water filter layer 403, they drive the second pressing plate 407 and the fourth pressing plate 405 to move, and squeeze all the water filter layers 403 in the upper cavity and the lower cavity. The water squeezed out of the water filter layer 403 is discharged through the first water diversion groove 4021 and the second water diversion groove 4022; after the water filter layer 403 is squeezed, the second electromagnet 427 is intermittently energized to generate a magnetic The second electromagnet 427 cooperates with the magnetic block to make the inner shell 402 shake in the second shell 401, and the water filter layer 403 makes the water droplets fall more quickly under the shaking of the inner shell 402, thereby improving the drying effect of the water filter layer 403; after the water filter layer 403 is squeezed, the first electromagnet is powered off to clear the first connecting pipe 428, and the airflow on one side of the movable block 409 enters the lower cavity through the first connecting pipe 428 to dry the airflow, and the fourth reset spring 412 pulls the movable block 409 to move back and reset.

[0053] like Fig.11As shown, as another preferred embodiment of the present invention, the motor can be arranged at one end of the first shell like the fan, that is, the motor and the fan are respectively located at two ends of the first shell, further reducing the volume of the compressor and making the overall elongated shape of the compressor more obvious.

[0054] The above descriptions are only some preferred embodiments of the present disclosure and an explanation of the technical principles used. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by a specific combination of the above-mentioned technical features, but should also cover other technical solutions formed by any combination of the above-mentioned technical features or their equivalent features without departing from the above-mentioned inventive concept. For example, the above-mentioned features are replaced with the technical features with similar functions disclosed in the embodiments of the present disclosure (but not limited to) and the technical solutions formed.

Claims

1. A linear air compressor, characterized in that: include: The first shell is configured as a long rectangular structure; A first piston and a second piston are respectively disposed at two ends of the first housing; A motor, used for driving the first piston and the second piston to move; Water filter device to dehumidify the compressed air; A cooling fan, disposed at one end of the first housing; A first compression chamber is provided at one end of the first shell, and a second compression chamber is provided at the other end. The first piston is provided in the first compression chamber, and the second piston is provided in the second compression chamber. The first compression chamber and the second compression chamber are connected, and the motor drives the first piston and the second piston to move in the same direction.

2. The linear air compressor according to claim 1, characterized in that: A transmission chamber is provided on the first shell, and the transmission chamber is located between the first compression chamber and the second compression chamber. A turntable is provided in the transmission chamber, and the turntable is connected to the output shaft of the motor. A first connecting rod is eccentrically connected to the turntable, and the first piston and the second piston are respectively provided at two ends of the first connecting rod.

3. The linear air compressor according to claim 1, characterized in that: The water filtering device comprises: A second shell, disposed on the first shell; An inner shell, disposed in the second shell; A plurality of water filtering layers are arranged in the inner shell; a first partition plate, dividing the inner shell into an upper chamber and a lower chamber; The water filtering layer is arranged in both the upper cavity and the lower cavity, a gap exists between the inner shell and the inner wall of the second shell, a plurality of connecting springs are arranged on the side wall of the inner shell, and one end of the connecting spring is fixedly connected to the inner wall of the second shell.

4. The linear air compressor according to claim 3, characterized in that: The second shell is provided with an air inlet and an air outlet, a movable block is provided in the second shell, and the movable block is provided with a first connecting pipe connecting the air inlet and the lower chamber and a second connecting pipe connecting the air outlet and the upper chamber.

5. The linear air compressor according to claim 4, characterized in that: A first pressing plate, a second pressing plate and a first supporting plate are arranged in the lower chamber, the first pressing plate and the first supporting plate are respectively arranged at two ends of the lower chamber, the second pressing plate is composed of multiple pieces arranged between the first pressing plate and the first supporting plate, and the second pressing plate and the first supporting plate are both porous plates; a third pressing plate, a fourth pressing plate and a second supporting plate are arranged in the upper chamber, the third pressing plate and the second supporting plate are respectively arranged at two ends of the upper chamber, the fourth pressing plate is composed of multiple pieces arranged between the third pressing plate and the second supporting plate, and the fourth pressing plate and the second supporting plate are both porous plates.

6. The linear air compressor according to claim 5, characterized in that: The first pressure plate is provided with a first through hole, the third pressure plate is provided with a second through hole, the first connecting tube is inserted in the first through hole, and the second connecting tube is inserted in the second through hole; the movable block is provided with a first through groove and a second through groove, one end of the first connecting tube is inserted in the first through groove, and one end of the second connecting tube is inserted in the second through groove, the cross-section of the first through groove is larger than the cross-section of the first through hole, the cross-section of the second through groove is larger than the cross-section of the second through hole, and end plates are respectively provided at one end of the first connecting tube and the second connecting tube.

7. The linear air compressor according to claim 6, characterized in that: The movable block is provided with a first push block and a second push block, the first push block is provided on one side of the first pressure plate, and the second push block is provided on one side of the third pressure plate; the third pressure plate is provided with a first movable cavity communicated with the second through hole, and the first movable plate is provided in the first movable cavity, and when the second push block pushes the pressure plate to move, the first movable plate moves into the second through hole and closes the second through hole.

8. The linear air compressor according to claim 7, characterized in that: A first movable groove is provided on the side wall of the first movable cavity, a second connecting rod is rotatably connected to the inner wall of the first movable groove, a third connecting rod is hinged at one end of the second connecting rod, one end of the third connecting rod is hinged to the first movable plate, the second push block is located on one side of the second connecting rod, a protrusion is provided on the first movable plate, a first return spring is provided on the protrusion, and one end of the first return spring rests on the inner wall of the first movable groove.

9. The linear air compressor according to claim 5, characterized in that: A convex rod is provided on the top of the upper cavity, a first groove corresponding to the convex rod is provided on the third pressure plate, a second groove corresponding to the convex rod is provided on the fourth pressure plate, a first slider is provided in the first groove, a first slide groove for movement of the first slider is provided on the convex rod, and a second return spring is provided on the first slider; a second slider is provided in the second groove, a second slide groove for movement of the second slider is provided on the upper row of the convex block, and a third return spring is provided on the second slider.

10. The linear air compressor according to claim 6, characterized in that: The movable block is provided with a second movable cavity communicated with the first through groove, and the second movable cavity is provided with a second movable plate and a first electromagnet, and the first electromagnet can drive the second movable plate to move in the second movable cavity; the second electromagnet is provided on the inner wall of the first shell, and a magnetic block is provided on the side wall of the inner shell.

Images