A reciprocating compressor with an active flow control valve

Abstract

The present invention belongs to the technical field related to pneumatic components, and discloses a reciprocating compressor with an active flow distribution valve, which includes a first cylinder block, a second cylinder block, a first suction valve plate, a second suction valve plate, a first isolation diaphragm, a second isolation diaphragm, a first exhaust valve plate, a second exhaust valve plate, a valve seat and a flow-through plate; the first cylinder block and the second cylinder block are respectively connected to opposite ends of the valve seat; the flow-through plate is arranged in the valve seat; the first exhaust valve plate and the second exhaust valve plate are respectively arranged in the valve seat and are symmetrically arranged on opposite sides of the exhaust port; the first isolation diaphragm and the second isolation diaphragm are respectively arranged on opposite end faces of the valve seat and are located in the first cylinder inner cavity formed by the first cylinder block and the second cylinder inner cavity formed by the second cylinder block; one ends of the first suction valve plate and the second suction valve plate are respectively fixedly connected to opposite end faces of the valve seat. The present invention can achieve the active opening and closing of the valve plate.

Description

Technical Field

[0001] The present invention belongs to the technical field related to pneumatic components, and more specifically, relates to a reciprocating compressor with an active flow distribution valve. Background Art

[0002] Reciprocating compressors are widely used in economy and construction, especially in industrial fields such as petroleum, chemical industry, and power, and have become essential key equipment.

[0003] Traditional reciprocating compressors adopt a crank - connecting rod structure. Each piston and cylinder body are equipped with independent suction valves and discharge valves. The suction valves and discharge valves include valve seats, valve plates, and springs. When the piston moves, the volume of the cylinder cavity changes, resulting in a pressure difference across the suction valve or discharge valve, thereby achieving the passive opening or passive closing of the suction valve or discharge valve.

[0004] The timely opening of the suction valve and the timely closing of the discharge valve have a significant impact on the discharge volume and efficiency of the reciprocating compressor. Limited by the working principle, the response frequencies of traditional passive suction valves and discharge valves are low, and the problems of late opening of the suction valve and late closing of the discharge valve are relatively prominent, resulting in difficulties in increasing the rotational speed of the reciprocating compressor and achieving miniaturization and light weight. Summary of the Invention

[0005] In view of the above - mentioned defects or improvement requirements of the prior art, the present invention provides a reciprocating compressor with an active flow distribution valve. The compressor can effectively solve the problems of late opening of the suction valve, late closing of the discharge valve, low response frequency, and difficulty in increasing the rotational speed of traditional reciprocating compressors, achieve high - speed operation of the reciprocating compressor, and realize miniaturization and light weight while increasing the discharge volume of the reciprocating compressor.

[0006] To achieve the above object, according to one aspect of the present invention, there is provided a reciprocating compressor with an active flow distribution valve. The compressor includes a first cylinder block, a second cylinder block, a first suction valve plate, a second suction valve plate, a first isolation diaphragm, a second isolation diaphragm, a first exhaust valve plate, a second exhaust valve plate, a valve seat and a flow-through plate. The first cylinder block and the second cylinder block are respectively connected to opposite ends of the valve seat. The flow-through plate is disposed within the valve seat, and opposite ends thereof are respectively provided with an air inlet and an air outlet, and a first internal flow passage and a second internal flow passage are further provided in the middle. The first exhaust valve plate and the second exhaust valve plate are respectively disposed within the valve seat and are symmetrically disposed on opposite sides of the air outlet. The first isolation diaphragm and the second isolation diaphragm are respectively disposed on opposite end faces of the valve seat and are located within the first cylinder inner cavity formed by the first cylinder block and within the second cylinder inner cavity formed by the second cylinder block. One ends of the first suction valve plate and the second suction valve plate are respectively fixedly connected to opposite end faces of the valve seat and are respectively disposed adjacent to the first isolation diaphragm and the second isolation diaphragm.

[0007] When compressed gas enters the first internal flow passage or the second internal flow passage, the first isolation diaphragm or the second isolation diaphragm elastically deforms to lift the first suction valve plate or the second suction valve plate, so that the air inlet is communicated with the first cylinder inner cavity or the air inlet is communicated with the second cylinder inner cavity. When the second suction valve plate is lifted, the compressed gas lifts the first exhaust valve plate to connect the first cylinder inner cavity with the air outlet, and the compressed gas also presses the second exhaust valve plate against the valve seat to automatically close the second exhaust valve plate, so that the second cylinder inner cavity is separated from the air outlet. The first suction valve plate is pressed against the valve seat by the compressed gas and is in a closed state.

[0008] Further, when the first suction valve plate is lifted, the compressed gas lifts the second exhaust valve plate to connect the second cylinder inner cavity with the air outlet, and the compressed gas also presses the first exhaust valve plate against the valve seat to actively close the first exhaust valve plate, so that the first cylinder inner cavity is separated from the air outlet. The second suction valve plate is pressed against the valve seat by the compressed gas and is in a closed state. In this way, the active opening and closing of the first suction valve plate and the second suction valve plate, as well as the active opening and closing of the first exhaust valve plate and the second exhaust valve plate are realized.

[0009] Further, the second cylinder inner cavity penetrates one end of the second cylinder block, the valve seat is connected to the second cylinder block and is communicated with the second cylinder inner cavity. The first cylinder inner cavity penetrates one end of the first cylinder block connected to the valve seat. The first cylinder inner cavity and the second cylinder inner cavity are respectively used to accommodate a first piston and a second piston.

[0010] Further, the valve seat is located between the first cylinder block and the second cylinder block, and is provided with a receiving hole which penetrates through the valve seat and is used for receiving the flow-through plate. On one side of the valve seat, second through holes, third connection holes, fourth connection holes and second communication holes are provided at intervals. The second through holes, the third connection holes and the fourth connection holes are all communicated with the receiving hole. A second groove is provided on the inner wall of the receiving hole adjacent to the second communication hole, and the second groove communicates the second through hole and the receiving hole. The second groove is used for receiving the second exhaust valve plate.

[0011] Further, on the other side of the valve seat, a first through hole, a first connection hole, a second connection hole and a first communication hole are provided. The first through hole, the first connection hole and the second connection hole are all communicated with the receiving hole. A first groove is provided on the inner wall of the receiving hole adjacent to the first communication hole, and the first groove communicates the first communication hole and the receiving hole, and is used for receiving the first exhaust valve plate.

[0012] Further, the air inlet is in a T shape and includes a communicated air inlet main hole, a first air inlet branch hole and a second air inlet branch hole. The first air inlet branch hole is communicated with the first through hole, and the second air inlet branch hole is communicated with the second through hole. The air outlet is in a T shape and includes a communicated exhaust main hole, a first exhaust branch hole and a second exhaust branch hole. Third grooves and fourth grooves are respectively provided on the two opposite sides of the flow-through plate. The third groove is arranged in a staggered manner with the first groove and is partially opposite, and the fourth groove is partially opposite to the second groove.

[0013] Further, the first internal flow channel includes a first horizontal section, a first communication section and a second horizontal section which are sequentially communicated. The first horizontal section is communicated with the second connection hole, and the second horizontal section is communicated with the third connection hole. The second internal flow channel includes a third horizontal section, a second communication section and a fourth horizontal section which are sequentially communicated. The third horizontal section is communicated with the fourth connection hole, and the fourth horizontal section is communicated with the first connection hole.

[0014] Further, a first isolation diaphragm is provided at the end of the first connection hole facing the inner cavity of the first cylinder block, and a second isolation diaphragm is provided at the end of the third connection hole facing the inner cavity of the second cylinder block.

[0015] Further, the second intake valve plate is located in the inner cavity of the second cylinder. One end of it is fixed on the valve seat and is located between the third connection hole and the fourth connection hole, and the other end is movably arranged. When the second intake valve plate is closed, it covers the third connection hole and the second through hole, so that the intake port is separated from the inner cavity of the second cylinder. The first intake valve plate is arranged in the inner cavity of the first cylinder. One end of it is fixed on the valve seat and is located between the first connection hole and the second connection hole. When the first intake valve plate is closed, it covers the first connection hole and the first through hole, so that the air inlet is separated from the inner cavity of the first cylinder.

[0016] Further, one end of the second exhaust valve plate is fixed in the area of the bottom surface of the fourth groove opened on the flow-through plate and away from the second communication hole, and the other end is movable; one end of the first exhaust valve plate is fixed in the area of the bottom surface of the first groove and away from the first communication hole, and the other end is movably arranged.

[0017] Generally speaking, compared with the prior art by the above technical solutions conceived by the present invention, the reciprocating compressor with an active flow distribution valve provided by the present invention mainly has the following beneficial effects:

[0018] 1. By compressing the gas into the first internal flow channel or the second internal flow channel, the first isolation diaphragm or the second isolation diaphragm elastically deforms to lift the first intake valve plate or the second intake valve plate, so that the air inlet is communicated with the inner cavity of the first cylinder or the air inlet is communicated with the inner cavity of the second cylinder. When the second intake valve plate is lifted, the compressed gas lifts the first exhaust valve plate to communicate the inner cavity of the first cylinder with the exhaust port, and the compressed gas also presses the second exhaust valve plate against the valve seat to automatically close the second exhaust valve plate, so that the inner cavity of the second cylinder is separated from the exhaust port. The first intake valve plate is pressed against the valve seat by the compressed gas and is in a closed state. In this way, the present invention can realize the active opening of the intake valve and the active closing of the exhaust valve, complete the normal intake and exhaust actions, avoid the phenomenon of delayed opening of the traditional intake valve and delayed closing of the exhaust valve, and thus is beneficial to realizing the high-speed operation of the reciprocating compression, and realizing small size and light weight while increasing the exhaust volume of the reciprocating compressor.

[0019] 2. The active flow distribution valve composed of the flow-through plate, intake valve plate, exhaust valve plate, isolation diaphragm and valve seat of the present invention is significantly less affected by the rotational speed, which is beneficial to realizing the high-speed operation of the reciprocating compressor, and realizing small size and light weight while increasing the exhaust volume of the reciprocating compressor.

[0020] 3. The structure of the reciprocating compressor is compact, the volume is small, and the applicability is strong. Description of the Drawings

[0021] Figure 1 It is a schematic diagram when the double pistons of the reciprocating compressor with an active flow distribution valve provided by the present invention move to the right;

[0022] Figure 2 is Figure 1 a schematic diagram when the double pistons of the reciprocating compressor with an active flow distribution valve in

[0023] In all the drawings, the same reference numerals are used to represent the same elements or structures, where: 11 - the second linear motor, 12 - the first linear motor, 21 - the second piston, 31 - the second cylinder block, 41 - the second suction valve plate, 31A - the inner cavity of the second cylinder block, 51 - the valve seat, 81 - the second isolation diaphragm, 71 - the second exhaust valve plate, 6 - the flow-through plate, 42 - the first suction valve plate, 32A - the inner cavity of the first cylinder block, 32 - the first cylinder block, 22 - the first piston, 72 - the first exhaust valve plate, 82 - the first isolation diaphragm. Detailed implementation manners

[0024] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the 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. In addition, the technical features involved in the various implementation manners of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0025] Please refer to Figure 1 and Figure 2 The present invention provides a reciprocating compressor with an active flow distribution valve. The compressor includes a first linear motor 12, a second linear motor 11, a first piston 22, a second piston 21, a first cylinder block 32, a second cylinder block 31, a first suction valve plate 42, a second suction valve plate 41, a first isolation diaphragm 82, a second isolation diaphragm 81, a first exhaust valve plate 72, a second exhaust valve plate 71, a valve seat 51 and a flow-through plate 6.

[0026] The first cylinder block 32 and the second cylinder block 31 are respectively connected to opposite ends of the valve seat 51. One end of the second piston 21 is connected to the second linear motor 11, and the other end is movably arranged in the inner cavity 31A of the second cylinder block formed by the second cylinder block 31. One end of the first piston 22 is connected to the first linear motor 12, and the other end is movably arranged in the inner cavity 32A of the first cylinder block formed by the first cylinder block 32. In this embodiment, the structure of the first cylinder block 32 is the same as that of the second cylinder block 31, the structure of the first piston 22 is the same as that of the second piston 21, and the structure of the first linear motor 12 is the same as that of the first linear motor 12.

[0027] The flow-through plate 6 is arranged inside the valve seat 51. Intake ports and exhaust ports are respectively formed at two opposite ends thereof, and a first internal flow path and a second internal flow path are also formed in the middle. The first exhaust valve plate 72 and the second exhaust valve plate 71 are respectively arranged inside the valve seat 51, and are symmetrically arranged on two opposite sides of the exhaust port. The first isolation diaphragm 82 and the second isolation diaphragm 81 are respectively arranged on two opposite end faces of the valve seat 51 and are located in the first cylinder inner cavity 32A formed by the first cylinder body 32 and the second cylinder inner cavity 31A formed by the second cylinder body 31. One ends of the first intake valve plate 42 and the second intake valve plate 41 are respectively fixedly connected to two opposite end faces of the valve seat 51, and are respectively arranged adjacent to the first isolation diaphragm 82 and the second isolation diaphragm 81. Compressed gas enters the first internal flow path or the second internal flow path to cause elastic deformation of the first isolation diaphragm 82 or the second isolation diaphragm 81, so as to lift the first intake valve plate 42 or the second intake valve plate 41, such that the intake port is communicated with the first cylinder inner cavity 32A or the intake port is communicated with the second cylinder inner cavity 31A; when the second intake valve plate 41 is lifted, the compressed gas lifts the first exhaust valve plate 72 to communicate the first cylinder inner cavity 32A with the exhaust port, and the compressed gas also presses the second exhaust valve plate 71 against the valve seat 51 to automatically close the second exhaust valve plate 71, so as to cut off the second cylinder inner cavity 31A from the exhaust port; the first intake valve plate 42 is pressed against the valve seat 51 by the compressed gas and is in a closed state; when the first intake valve plate 42 is lifted, the compressed gas lifts the second exhaust valve plate 71 to communicate the second cylinder inner cavity 31A with the exhaust port, and the compressed gas also presses the first exhaust valve plate 72 against the valve seat 51 to actively close the first exhaust valve plate 72, so as to cut off the first cylinder inner cavity 32A from the exhaust port, and the second intake valve plate 41 is pressed against the valve seat 51 by the compressed gas and is in a closed state; thus, active opening and closing of the first intake valve plate 42 and the second intake valve plate 41, and active opening and closing of the first exhaust valve plate 72 and the second exhaust valve plate 71 are realized.

[0028] Wherein, the first intake valve plate 42 and the second intake valve plate 41 are interlocked, that is, when the first intake valve plate 42 is opened, the second intake valve plate 41 is closed; the first exhaust valve plate 72 and the second exhaust valve plate 71 are interlocked, that is, when the first exhaust valve plate 72 is opened, the second exhaust valve plate 71 is closed.

[0029] The inner cavity 31A of the second cylinder penetrates through one end of the second cylinder. The valve seat 51 is connected to the second cylinder and is in communication with the inner cavity 31A of the second cylinder. The inner cavity 32A of the first cylinder penetrates through the first cylinder and is connected to one end of the valve seat 51. The inner cavity 32A of the first cylinder and the inner cavity 31A of the second cylinder are respectively used for accommodating the first piston 22 and the second piston 21.

[0030] The valve seat 51 is located between the first cylinder and the second cylinder and is provided with a receiving hole which penetrates through the valve seat 51 and is used for receiving the flow-through plate 6. On one side of the valve seat 51, a second through hole, a third connection hole, a fourth connection hole and a second communication hole are provided at intervals. The second through hole, the third connection hole and the fourth connection hole are all in communication with the receiving hole. A second groove is provided on the inner wall of the receiving hole adjacent to the second communication hole, and the second groove communicates the second through hole and the receiving hole. The second groove is used for receiving the second exhaust valve plate 71.

[0031] On the other side of the valve seat 51, a first through hole, a first connection hole, a second connection hole and a first communication hole are provided. The first through hole, the first connection hole and the second connection hole are all in communication with the receiving hole. A first groove is provided on the inner wall of the receiving hole adjacent to the first communication hole, and the first groove communicates the first communication hole and the receiving hole and is used for receiving the first exhaust valve plate 72.

[0032] In this embodiment, the central axis of the second through hole coincides with the central axis of the first through hole, the central axis of the third connection hole coincides with the central axis of the first connection hole, the central axis of the fourth connection hole coincides with the central axis of the second connection hole, the central axis of the first communication hole coincides with the central axis of the second communication hole, and the central axes of the second through hole, the third connection hole, the fourth connection hole and the second communication hole are parallel to each other.

[0033] The air inlet is in a T shape and includes a communicating air inlet main hole, a first air inlet branch hole and a second air inlet branch hole. The central axis of the first air inlet branch hole coincides with the central axis of the second air inlet branch hole and coincides with the central axis of the second through hole. The first air inlet branch hole is in communication with the first through hole, and the second air inlet branch hole is in communication with the second through hole.

[0034] The exhaust port is T-shaped and includes a communicating exhaust main hole, a first exhaust branch hole, and a second exhaust branch hole. The central axes of the first exhaust branch hole and the second exhaust branch hole coincide. On the opposite sides of the flow-through plate 6, a third groove and a fourth groove are respectively formed. The first exhaust branch hole penetrates the bottom surface of the third groove, and the second exhaust branch hole penetrates the bottom surface of the fourth groove. The third groove and the first groove are arranged in a dislocation manner and partially opposite to each other, and the fourth groove and the second groove are partially opposite to each other.

[0035] The first internal flow channel includes a first horizontal section, a first communication section, and a second horizontal section that are connected in sequence. The first horizontal section communicates with the second connection hole, and the second horizontal section communicates with the third connection hole. The second internal flow channel includes a third horizontal section, a second communication section, and a fourth horizontal section that are connected in sequence. The third horizontal section communicates with the fourth connection hole, and the fourth horizontal section communicates with the first connection hole.

[0036] Please refer to Figure 2 , at the end of the first connection hole facing the inner cavity 32A of the first cylinder, a first isolation diaphragm 82 is provided. At the end of the third connection hole facing the inner cavity 31A of the second cylinder, a second isolation diaphragm 81 is provided. The second intake valve plate 41 is located in the inner cavity 31A of the second cylinder. One end of it is fixed on the valve seat 51 and this end is located between the third connection hole and the fourth connection hole, and the other end is movably arranged. When the second intake valve plate 41 is closed, it covers the third connection hole and the second through hole, so that the intake port is separated from the inner cavity 31A of the second cylinder, and the first internal flow channel is separated from the inner cavity 31A of the second cylinder.

[0037] The first intake valve plate 42 is arranged in the inner cavity 32A of the first cylinder. One end of it is fixed on the valve seat 51 and this end is located between the first connection hole and the second connection hole. When the first intake valve plate 42 is closed, it covers the first connection hole and the first through hole, so that the intake port is separated from the inner cavity 32A of the first cylinder, and the second internal flow channel is separated from the inner cavity 32A of the first cylinder.

[0038] One end of the second exhaust valve plate 71 is fixed in the area of the bottom surface of the fourth groove far from the second communication hole, and the other end is movable. When the second exhaust valve plate 71 is closed, it covers the second communication hole, so that the inner cavity 31A of the second cylinder is separated from the exhaust port. One end of the first exhaust valve plate 72 is fixed in the area of the bottom surface of the first groove far from the first communication hole, and the other end is movable. When the first exhaust valve plate 72 is closed, it covers the first communication hole, so that the inner wall of the first cylinder is separated from the exhaust port.

[0039] In this embodiment, the first intake valve sheet 42, the second intake valve sheet 41, the first exhaust valve sheet 72, and the second exhaust valve sheet 71 are all sheet-shaped and are all made of spring sheets with good elasticity. The first piston 22 and the second piston 21 move synchronously, that is, their relative positions remain unchanged. When one piston compresses air, the other piston intakes air. The gas in the working chamber of the cylinder block can directly act on the isolation diaphragm, causing the corresponding isolation diaphragm to undergo elastic deformation, so that the corresponding intake valve sheet actively opens. The isolation diaphragm is fixed on the valve seat 51 by welding to achieve the sealing of the gas at both ends and only undergoes elastic deformation under the action of the pressure difference.

[0040] When the second linear motor 11 drives the second piston 21 to move rightward in the inner cavity 31A of the second cylinder formed by the second cylinder block, the first linear motor 12 drives the first piston 22 to move rightward in the inner cavity 32A of the first cylinder formed by the first cylinder block. At this time, the volume of the inner cavity 31A of the second cylinder decreases, the volume of the inner cavity 32A of the first cylinder increases, the high-pressure gas in the inner cavity 31A of the second cylinder lifts one end of the second exhaust valve sheet 71, so that the inner cavity 31A of the second cylinder is communicated with the exhaust port, and the high-pressure gas enters the exhaust port and acts on the first exhaust valve sheet 72 to achieve the timely closing of the second exhaust valve sheet 71. At the same time, the high-pressure gas in the inner cavity 31A of the second cylinder acts on the first isolation diaphragm 82 through the fourth connection hole, the second internal flow channel, and the first connection hole in sequence, causing the first isolation diaphragm 82 to undergo elastic deformation to push open the first intake valve sheet 42, achieving the active opening of the first intake valve sheet 42, so that the low-pressure gas enters the inner cavity 32A of the first cylinder from the intake port and the first communication hole, realizing the intake action of the first piston 22.

[0041] When the first linear motor 12 drives the first piston 22 to move leftward in the inner cavity 32A of the first cylinder, the second linear motor 11 drives the second piston 21 to move leftward in the inner cavity 31A of the second cylinder. At this time, the volume of the inner cavity 31A of the second cylinder increases, the volume of the inner cavity 32A of the first cylinder decreases, the high-pressure gas in the inner cavity 32A of the first cylinder enters the exhaust port through the first exhaust valve sheet 72 and acts on the second exhaust valve sheet 71 to achieve the timely closing of the second exhaust valve sheet 71. At the same time, the gas in the inner cavity 32A of the first cylinder acts on the second isolation diaphragm 81 through the first internal flow channel, causing the second isolation diaphragm 81 to undergo elastic deformation to push open the second intake valve sheet 41, achieving the active opening of the second intake valve sheet 41, so that the low-pressure gas enters the inner cavity 31A of the second cylinder through the second intake valve sheet 41, realizing the intake action of the second piston 21.

[0042] Compared with the traditional passive flow distribution valve, the suction valve plate of the present invention can be actively opened, and the exhaust valve plate can be actively closed, effectively solving the problem of lag in opening or closing, which is beneficial to improving the volumetric efficiency of the compressor. At the same time, the influence of the rotational speed on the active flow distribution valve composed of the flow passage plate 6, the suction valve plate, the exhaust valve plate, the isolation diaphragm and the valve seat 51 of the present invention is significantly weakened, which is beneficial to realizing the high-speed operation of the reciprocating compressor, and realizing miniaturization and light weight while increasing the exhaust volume of the reciprocating compressor.

[0043] Those skilled in the art can easily understand that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention should be included within the protection scope of the present invention.

Claims

1. A reciprocating compressor with an active flow control valve, characterized in that: The compressor includes a first cylinder block, a second cylinder block, a first suction valve plate, a second suction valve plate, a first isolation diaphragm, a second isolation diaphragm, a first discharge valve plate, a second discharge valve plate, a valve seat and a flow-through plate; the first cylinder block and the second cylinder block are respectively connected to opposite ends of the valve seat; the flow-through plate is arranged in the valve seat, and intake ports and discharge ports are respectively formed at opposite ends thereof, and a first internal flow channel and a second internal flow channel are also formed in the middle; the first discharge valve plate and the second discharge valve plate are respectively arranged in the valve seat and symmetrically arranged on opposite sides of the discharge port; the first isolation diaphragm and the second isolation diaphragm are respectively arranged on opposite end faces of the valve seat and located in the first cylinder inner cavity formed by the first cylinder block and the second cylinder inner cavity formed by the second cylinder block; one ends of the first suction valve plate and the second suction valve plate are respectively fixedly connected to opposite end faces of the valve seat and are respectively adjacent to the first isolation diaphragm and the second isolation diaphragm. By compressed gas entering the first internal flow channel or the second internal flow channel, the first isolation diaphragm or the second isolation diaphragm elastically deforms to lift the first suction valve plate or the second suction valve plate, so that the intake port is communicated with the first cylinder inner cavity or the intake port is communicated with the second cylinder inner cavity; when the second suction valve plate is lifted, the compressed gas lifts the first discharge valve plate to communicate the first cylinder inner cavity with the discharge port, and the compressed gas also presses the second discharge valve plate against the valve seat to automatically close the second discharge valve plate, so that the second cylinder inner cavity is separated from the discharge port; the first suction valve plate is pressed against the valve seat by the compressed gas and is in a closed state.

2. The reciprocating compressor with an active flow control valve according to claim 1, characterized in that: When the first suction valve plate is lifted, the compressed gas lifts the second discharge valve plate to communicate the second cylinder inner cavity with the discharge port, and the compressed gas also presses the first discharge valve plate against the valve seat to actively close the first discharge valve plate, so that the first cylinder inner cavity is separated from the discharge port, and the second suction valve plate is pressed against the valve seat by the compressed gas and is in a closed state; thus, the active opening and closing of the first suction valve plate and the second suction valve plate, as well as the active opening and closing of the first discharge valve plate and the second discharge valve plate are realized.

3. The reciprocating compressor with an active flow control valve according to claim 1, characterized in that: The second cylinder inner cavity penetrates one end of the second cylinder block, the valve seat is connected to the second cylinder block and is communicated with the second cylinder inner cavity; the first cylinder inner cavity penetrates one end of the first cylinder block and is connected to the valve seat; the first cylinder inner cavity and the second cylinder inner cavity are respectively used for accommodating a first piston and a second piston.

4. The reciprocating compressor with an active flow control valve according to claim 3, characterized in that: The valve seat is located between the first cylinder block and the second cylinder block, and is provided with a receiving hole which penetrates through the valve seat and is used for receiving the flow plate; on one side of the valve seat, second through holes, third connection holes, fourth connection holes and second communication holes which are arranged at intervals are provided, and the second through holes, the third connection holes and the fourth connection holes are all communicated with the receiving hole; a second groove is provided on the inner wall of the receiving hole adjacent to the second communication hole, and the second groove communicates the second through hole and the receiving hole; the second groove is used for receiving the second exhaust valve plate.

5. The reciprocating compressor with an active flow distribution valve according to claim 4, wherein: on the other side of the valve seat, a first through hole, a first connection hole, a second connection hole and a first communication hole are provided, and the first through hole, the first connection hole and the second connection hole are all communicated with the receiving hole; a first groove is provided on the inner wall of the receiving hole adjacent to the first communication hole, and the first groove communicates the first communication hole and the receiving hole and is used for receiving the first exhaust valve plate.

6. The reciprocating compressor with an active flow distribution valve according to claim 5, wherein: the air inlet is in a T shape and includes a communicated air inlet main hole, a first air inlet branch hole and a second air inlet branch hole; the first air inlet branch hole is communicated with the first through hole, and the second air inlet branch hole is communicated with the second through hole; the air outlet is in a T shape and includes a communicated air outlet main hole, a first air outlet branch hole and a second air outlet branch hole, and third grooves and fourth grooves are respectively provided on the opposite sides of the flow plate; the third groove is arranged in a dislocation manner with respect to the first groove and is partially opposite, and the fourth groove is partially opposite to the second groove.

7. The reciprocating compressor with an active flow distribution valve according to claim 5, wherein: the first internal flow passage includes a first horizontal section, a first communication section and a second horizontal section which are sequentially communicated, the first horizontal section is communicated with the second connection hole, and the second horizontal section is communicated with the third connection hole; the second internal flow passage includes a third horizontal section, a second communication section and a fourth horizontal section which are sequentially communicated, the third horizontal section is communicated with the fourth connection hole, and the fourth horizontal section is communicated with the first connection hole.

8. The reciprocating compressor with an active flow distribution valve according to claim 7, wherein: a first isolation diaphragm is arranged at the end of the first connection hole facing the inner cavity of the first cylinder block, and a second isolation diaphragm is arranged at the end of the third connection hole facing the inner cavity of the second cylinder block.

9. The reciprocating compressor with an active flow distribution valve according to claim 8, wherein: The second intake valve plate is located in the inner cavity of the second cylinder. One end of the second intake valve plate is fixed on the valve seat and is located between the third connection hole and the fourth connection hole, and the other end is movably arranged. When the second intake valve plate is closed, it covers the third connection hole and the second through hole, so that the intake port is separated from the inner cavity of the second cylinder. The first intake valve plate is arranged in the inner cavity of the first cylinder. One end of the first intake valve plate is fixed on the valve seat and is located between the first connection hole and the second connection hole. When the first intake valve plate is closed, it covers the first connection hole and the first through hole, so that the air inlet is separated from the inner cavity of the first cylinder.

10. The reciprocating compressor with an active flow distribution valve according to claim 6, characterized in that: One end of the second exhaust valve plate is fixed in the area of the bottom surface of the fourth groove opened on the flow-through plate and away from the second communication hole, and the other end is movable; one end of the first exhaust valve plate is fixed in the area of the bottom surface of the first groove and away from the first communication hole, and the other end is movably arranged.

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