A cylinder assembly and compressor

Abstract

The present disclosure provides a cylinder assembly and a compressor, the cylinder assembly comprising: a cylinder and a sliding part, the cylinder comprising a cylinder body, a cylinder cavity and a suction port, the cylinder cavity being located at the inner periphery of the cylinder body, and the suction port being located on the cylinder body and communicating with the cylinder cavity; the sliding part is arranged in the cylinder cavity, and at the initial compression, the sliding part can move to cover at least part of the suction port or increase the area of the suction port, and when the suction amount needs to be increased, the sliding part can move to increase the suction area of the suction port. According to the present disclosure, the suction area of the suction port can be increased when the suction amount needs to be increased in one cycle of roller operation, and the compression amount can be increased when the initial compression angle needs to be reduced to increase the compression amount, while the suction amount and the compression amount are considered; the relationship between the displacement and the suction port is balanced, the design is coordinated, and the original suction amount is ensured while the compression amount is increased.

Description

Technical Field

[0001] This disclosure relates to the field of compressor technology, specifically to a cylinder assembly and a compressor. Background Technology

[0002] Rotary compressors have an intake port, which has a specific size. Compression only begins after the rotor passes the intake port; the angle at that position is the initial compression angle. On the other hand, to ensure sufficient intake and reduce intake resistance, the intake port is generally made relatively large. This presents a dilemma: a large intake port with a large initial angle offers advantages in power consumption but reduces the actual compression volume. Conversely, a small intake port with a small initial angle increases compression volume but increases intake resistance, potentially leading to insufficient intake.

[0003] Because existing rotary compressors suffer from problems such as small intake ports leading to high intake resistance and insufficient intake volume, and large intake ports leading to reduced compression space and reduced compression volume, making it impossible to simultaneously achieve both intake and compression volume, this disclosure studies and designs a cylinder assembly and a compressor.

[0004] Public content

[0005] Therefore, the technical problem to be solved by this disclosure is to overcome the defect of existing rotary compressors that cannot simultaneously take into account both intake and compression, thereby providing a cylinder assembly and a compressor.

[0006] To address the aforementioned problems, this disclosure provides a cylinder assembly comprising:

[0007] The cylinder includes a cylinder body, a cylinder cavity, and an intake port. The cylinder cavity is located on the inner circumference of the cylinder body, and the intake port is located on the cylinder body and communicates with the cylinder cavity. The sliding part is disposed in the cylinder cavity. At the initial stage of compression, the sliding part can move to cover at least part of the intake port or increase the area of ​​the intake port. When it is necessary to increase the intake volume, the sliding part can move to increase the intake area of ​​the intake port.

[0008] In some embodiments, the sliding portion includes a first end and a second end along the circumferential direction of the cylinder, and the intake port includes a first groove formed on the axial end face of the cylinder body. A first elastic structure is connected to the inner wall of the first groove, and the other end of the first elastic structure is connected to the first end of the sliding portion. The first elastic structure can apply an elastic force to the sliding portion in a direction that increases the area of ​​the first groove.

[0009] In some embodiments, the first elastic structure is a spring, which can apply an elastic tension to the sliding part; within the cross-section of the cylinder, the first groove is a U-shaped groove; the first groove extends from one end of the cylinder along the axial direction to the other end.

[0010] In some embodiments, the cylinder body is further provided with a sliding vane groove, in which a sliding vane is disposed. In the circumferential direction of the cylinder, the position on the inner wall of the first groove and connected to the first elastic structure is closer to the sliding vane groove than other positions of the first groove.

[0011] In some embodiments, the central angle between the first end of the sliding portion and the second end of the sliding portion in the circumferential direction of the cylinder is α, and α > 180°.

[0012] In some embodiments, a cylinder communication groove is further provided on the cylinder body corresponding to the second end of the sliding part in the circumferential direction. The cylinder communication groove can communicate with the cylinder cavity to introduce gas. When compression is initially performed, the cylinder cavity communicating with the cylinder communication groove is the intake cavity. The gas in the intake cavity enters the cylinder communication groove to act on the sliding part. Under the combined force of the gas pressure and elasticity on the sliding part, the sliding part is driven to move to cover at least part of the intake port or increase the area of ​​the intake port. When it is necessary to increase the intake volume, the cylinder cavity communicating with the cylinder communication groove is the compression cavity. The gas in the compression cavity enters the cylinder communication groove to act on the sliding part. Under the combined force of the gas pressure and elasticity on the sliding part, the sliding part can move to increase the intake area of ​​the intake port.

[0013] In some embodiments, a protrusion is further provided near the second end of the sliding portion, and a second elastic structure is connected to the protrusion. The second elastic structure acts on the protrusion to apply an elastic force Fr1 that pushes the protrusion toward the second end.

[0014] In some embodiments, the gas in the cylinder chamber can enter the cylinder connecting groove to act on the protrusion and the second end. The pressure direction of the gas acting on the protrusion is the direction that drives the sliding part to increase the suction area of ​​the air intake port, and the pressure direction of the gas acting on the second end is the direction that drives the sliding part to decrease the suction area of ​​the air intake port. In a plane perpendicular to the circumferential direction of the cylinder, the area of ​​the gas acting on the protrusion is greater than the area of ​​the gas acting on the second end.

[0015] In some embodiments, the force exerted by the gas in the cylinder cavity on the protrusion is Fp1, the force exerted by the gas in the cylinder cavity on the second end is Fp2, the elastic force exerted by the second elastic structure on the protrusion is Fr1, and the elastic force exerted by the first elastic structure on the first end is Fr2.

[0016] When the roller rotates to the cylinder chamber at the initial compression stage, the cylinder chamber connected to the cylinder communication groove is the intake chamber, and Fr2+Fp2>Fr1+Fp1. The sliding part moves to reduce the initial compression angle. As the roller rotates, when the pressure in the cylinder chamber connected to the cylinder communication groove increases to a preset value, Fr2+Fp2<Fr1+Fp1. The sliding part moves to increase the intake port. As the roller continues to rotate, when the sliding part slides to the second end and abuts against the peripheral wall of the cylinder communication groove, the cylinder communication groove connects to the intake chamber, Fp2=0, Fr2>Fr1+Fp1. The sliding part is pulled back by the first elastic structure and returns to the starting position.

[0017] In some embodiments, a second groove is provided on the cylinder body in communication with the cylinder communication groove. At least a portion of the second elastic structure is disposed in the second groove, and one end of the second elastic structure is connected to the inner peripheral wall of the second groove and the other end is connected to the protrusion. In the rotation direction of the roller, the second groove is located at the upstream end of the cylinder communication groove.

[0018] In some embodiments, the protrusion is a structure connected to the radial outer periphery of the sliding portion and extending radially outward.

[0019] In some embodiments, the cylinder body is divided into two semi-circular parts within the cross-section of the cylinder by the extending direction of the sliding vane groove. The cylinder connecting groove and the intake port are located on different semi-circular parts. The cylinder body is also provided with an exhaust port, which is located on the same semi-circular part as the cylinder connecting groove.

[0020] In some embodiments, the sliding part is a structure that extends along the axial direction of the cylinder. Within the cross-section of the cylinder, the sliding part is an arc-shaped annular structure, and the radial outer periphery of the sliding part is fitted to the radial inner periphery of the cylinder body. The sliding part can slide along the circumferential direction of the cylinder on the inner circumferential surface of the cylinder body.

[0021] This disclosure also provides a compressor that includes the cylinder assembly described in the previous one.

[0022] The cylinder assembly and compressor disclosed herein have the following beneficial effects:

[0023] 1. This disclosure provides a sliding part on the inner circumference of the cylinder body. This sliding part can move to block at least part of the intake port or increase the area of ​​the blocked intake port at the initial compression stage. This effectively reduces the compression starting angle of the compressor, thereby effectively increasing the compression area and improving the compression quantity. When the roller rotates to a certain position and the next intake chamber is formed, an increase in intake volume is required. At this time, the sliding part can move to increase the intake area of ​​the intake port. Therefore, within one cycle of roller rotation, the intake area of ​​the intake port can be increased when an increase in intake volume is needed, and the compression quantity can be increased when the initial compression angle needs to be reduced to increase the compression quantity. This balances both intake volume and compression quantity; it weighs the relationship between displacement and intake port, and through coordinated design, ensures the original intake volume while increasing the compression quantity.

[0024] 2. The compressor of this disclosure operates on a cycle where the intake volume gradually increases and then decreases. At the start of intake, the intake volume is small, the intake port size decreases, and the initial compression angle decreases. As the intake angle increases, the intake port size gradually increases, and at another intake angle, the intake port returns to its original position. This disclosure effectively reduces the initial compression angle, increases the actual compression volume, and improves compressor performance. It also ensures sufficient intake capacity and low resistance. Attached Figure Description

[0025] Figure 1 This is a top view of the cylinder assembly disclosed herein;

[0026] Figure 2 for Figure 1 Force analysis diagram of the sliding part in the middle;

[0027] Figure 3 for Figure 1 A schematic diagram of the circumferential angle of the sliding part;

[0028] Figure 4 This is a curve showing the optimal design angle of the central angle of the sliding part in this disclosure.

[0029] The reference numerals in the attached figures are as follows:

[0030] 1. Cylinder; 11. Cylinder body; 12. Cylinder cavity; 13. Sliding vane groove; 14. Second groove; 2. Sliding part; 21. First end; 22. Second end; 23. Protrusion; 3. First elastic structure; 4. Cylinder connecting groove; 5. Second elastic structure; 6. Intake port; 61. First groove; 7. Sliding vane; 8. Roller. Detailed Implementation

[0031] like Figure 1-4 As shown, this disclosure provides a cylinder assembly, which includes:

[0032] The system comprises a cylinder 1 and a sliding part 2. The cylinder 1 includes a cylinder body 11, a cylinder cavity 12, and an intake port 6. The cylinder cavity 12 is located on the inner circumference of the cylinder body 11, and the intake port 6 is located on the cylinder body 11 and communicates with the cylinder cavity 12. The sliding part 2 is disposed in the cylinder cavity 12. At the initial stage of compression, the sliding part 2 can move to cover at least part of the intake port 6 or increase the area of ​​the intake port 6 being covered. When it is necessary to increase the intake volume, the sliding part 2 can move to increase the intake area of ​​the intake port 6. That is, it can reduce the area of ​​the intake port 6 being covered, and when it is necessary to increase the compression volume, the sliding part 2 can be controlled to increase the area of ​​the intake port being covered.

[0033] This disclosure, by providing a sliding part on the inner circumference of the cylinder body, and having the sliding part capable of moving to block at least part of the intake port or increasing the area of ​​the blocked intake port at the initial stage of compression, effectively reduces the compression starting angle of the compressor, thereby effectively increasing the compression area and improving the compression quantity. When the roller rotates to a certain position and the next intake chamber is formed, requiring an increase in intake volume, the sliding part can again move to increase the intake area of ​​the intake port. Therefore, within one cycle of roller rotation, the intake area of ​​the intake port can be increased when an increase in intake volume is needed, and the compression quantity can be increased when a decrease in the initial compression angle is needed to increase the compression quantity, thus balancing both intake volume and compression quantity. By balancing the relationship between displacement and intake port, and through coordinated design, the original intake volume is guaranteed while the compression quantity is increased. In the complete cycle of the compressor of this disclosure, the intake volume gradually increases and then decreases. At the beginning of intake, the intake volume is small, the intake port decreases, and the initial compression angle decreases. Upon reaching a certain intake angle, the intake port gradually increases, and upon reaching another intake angle, the intake port returns to its original position. This invention effectively reduces the initial compression angle, increases the actual compression capacity, and improves compressor performance. It also ensures ample intake air and low resistance.

[0034] 1. A cylinder assembly provided in this disclosure has a sliding block (sliding part) having a small initial compression angle in the initial position;

[0035] 2. A cylinder assembly provided in this disclosure has a sliding block, wherein the intake port gradually increases to its maximum size when compressed to a certain angle;

[0036] 3. A cylinder assembly provided in this disclosure has a sliding block, wherein the intake port returns to its original position when compressed to a certain angle.

[0037] In some embodiments, the sliding portion 2 includes a first end 21 and a second end 22 along the circumferential direction of the cylinder, and the intake port 6 includes a first groove 61 formed on the axial end face of the cylinder body 11. A first elastic structure 3 is connected to the inner wall of the first groove 61, and the other end of the first elastic structure 3 is connected to the first end 21 of the sliding portion 2. The first elastic structure 3 can apply an elastic force to the sliding portion 2 in a direction that increases the area of ​​the first groove 61. This is a preferred structural form of the sliding portion of this disclosure. Through the first groove and the first elastic structure, the first elastic structure can be accommodated in the first groove and connected to the first end of the sliding portion to provide the elastic force of the sliding portion, driving the sliding portion to move in the direction of the slide to block the intake port.

[0038] In some embodiments, the first elastic structure 3 is a spring, which can apply an elastic tension to the sliding part 2; within the cross-section of the cylinder, the first groove 61 is a U-shaped groove; the first groove 61 extends from one end of the cylinder along the axial direction to the other end. This is a preferred structural form of the first elastic structure and the first groove of this disclosure. The elastic tension can provide a restoring force for the sliding part to move in the direction of the slide plate. The first groove preferably extends from one end face to the other end face along the axial direction, or it may not extend axially. It is preferably a U-shaped groove, and the part of the air intake for air intake extends radially through the cylinder body.

[0039] In some embodiments, the cylinder body 11 is further provided with a sliding vane groove 13, in which a sliding vane 7 is disposed. The position on the inner wall of the first groove 61, which is connected to the first elastic structure 3, is closer to the sliding vane groove 13 in the circumferential direction of the cylinder compared to other positions of the first groove 61. The sliding vane disposed in the sliding vane groove of this disclosure ensures effective sealing between the intake chamber and the compression chamber, and the proximity of the position where the first groove connects to the first elastic structure to the sliding vane groove allows the first elastic structure to apply an elastic restoring force to the sliding portion in the direction of the sliding vane groove.

[0040] In some embodiments, the central angle between the first end 21 and the second end 22 of the sliding part 2 in the circumferential direction of the cylinder is α, and α > 180°. By setting the central angle α of the sliding part in the circumferential direction to > 180°, this disclosure can effectively ensure that when the position of its second end is located in the compression chamber, the intake port is connected to the next intake chamber, and can prevent the sliding part from disengaging from the cylinder and causing jamming.

[0041] Further optimization is to select a = 180°-240°. For example... Figure 4As shown, the intake volume of the cylinder compression changes from small to large to small as the intake angle changes. Since a > 180°, the optimal setting angle of the sliding groove should be 180°-240° (the arc from the sliding plate position clockwise to the position of the cylinder connecting groove). The second spring acts to prevent impact.

[0042] In some embodiments, a cylinder communication groove 4 is also provided on the cylinder body 11 corresponding to the second end 22 in the circumferential direction of the sliding part 2. The cylinder communication groove 4 can communicate with the cylinder cavity 12 to introduce gas. When compression is initially performed, the cylinder cavity 12 communicating with the cylinder communication groove 4 is an intake cavity. The gas in the intake cavity enters the cylinder communication groove 4 to act on the sliding part 2. Under the combined force of the gas pressure and elasticity on the sliding part 2, the sliding part 2 is driven to move to cover at least part of the intake port 6 or increase the area of ​​the intake port 6. When it is necessary to increase the intake volume, the cylinder cavity 12 communicating with the cylinder communication groove 4 is a compression cavity. The gas in the compression cavity enters the cylinder communication groove 4 to act on the sliding part 2. Under the combined force of the gas pressure and elasticity on the sliding part 2, the sliding part 2 can move to increase the intake area of ​​the intake port 6.

[0043] This is a further preferred structural form of the cylinder body disclosed herein. By providing a cylinder connecting groove, the cylinder chamber (intake chamber or compression chamber) can be connected at the second end of the sliding part through the cylinder connecting groove to provide gas force acting on the second end of the sliding part. When the roller rotates to the compression start, the cylinder connecting groove connects to the intake chamber. The first elastic structure mainly provides elastic force to reduce the intake area of ​​the intake port. When the roller rotates to the next intake chamber to start intake or needs to increase the intake volume, the previous intake chamber becomes a compression chamber. Its internal pressure increases and drives the sliding part to slide to increase the intake area of ​​the intake port and increase the intake volume. This effectively achieves the effect of increasing the compression volume and increasing or maintaining the original intake volume within one cycle.

[0044] In some embodiments, a protrusion 23 is further provided on the sliding part 2 near the second end 22. A second elastic structure 5 is connected to the protrusion 23. The second elastic structure 5 acts on the protrusion 23 to apply an elastic force Fr1 that pushes the protrusion 23 toward the second end 22. This is a further preferred structural form of the sliding part of this disclosure. By providing a structure with a protrusion, the pressure of the gas flowing from the cylinder connecting groove can be withstood and thus acted on the sliding part. The second elastic structure can also act on the protrusion to apply an elastic force in the direction of increasing the suction area of ​​the intake port.

[0045] In some embodiments, the gas in the cylinder chamber 12 can enter the cylinder connecting groove 4 to act on the protrusion 23 and the second end 22. The pressure direction of the gas acting on the protrusion 23 is the direction that drives the sliding part 2 to increase the suction area of ​​the air intake port 6, and the pressure direction of the gas acting on the second end 22 is the direction that drives the sliding part 2 to decrease the suction area of ​​the air intake port 6. In a plane perpendicular to the circumferential direction of the cylinder, the area of ​​the gas acting on the protrusion 23 is greater than the area of ​​the gas acting on the second end 22.

[0046] The gas force introduced into the cylinder connecting groove of this disclosure can act on the convex and the second end respectively. The directions of the gas forces acting on the convex and the second end are opposite. However, since the area of ​​the convex is larger than the area of ​​the second end, when the cylinder connecting groove is connected to the compression chamber, the gas force and elastic force acting on the convex can be greater than the elastic force and elastic force acting on the first end, thereby driving the sliding part to move to open the intake port. When the gas pressure in the cylinder connecting groove is low, the intake area of ​​the intake port is still increased by the above-mentioned resultant force. Thus, the intake area or compression area can be changed according to the compression state or intake state inside the cylinder, thereby increasing the intake volume during intake and increasing the compression angle and compression volume at the beginning of compression.

[0047] In some embodiments, the force exerted by the gas in the cylinder cavity on the protrusion 23 is Fp1, the force exerted by the gas in the cylinder cavity on the second end 22 is Fp2, the elastic force exerted by the second elastic structure 5 on the protrusion 23 is Fr1, and the elastic force exerted by the first elastic structure 3 on the first end 21 is Fr2.

[0048] When the roller rotates to the cylinder chamber at the initial compression stage, the cylinder chamber 12 connected to the cylinder communication groove 4 is the intake chamber, and Fr2+Fp2>Fr1+Fp1. The sliding part 2 moves to reduce the initial compression angle. As the roller rotates, when the pressure in the cylinder chamber 12 connected to the cylinder communication groove 4 increases to a preset value, Fr2+Fp2<Fr1+Fp1. The sliding part 2 moves to increase the intake port. As the roller continues to rotate, when the sliding part 2 slides to the second end 22 and abuts against the peripheral wall of the cylinder communication groove 4, the cylinder communication groove 4 connects to the intake chamber, Fp2=0, Fr2>Fr1+Fp1. The sliding part 2 is pulled back by the first elastic structure and returns to the starting position.

[0049] These are the movement positions of the sliding part of the roller of the present disclosure under several different movement states, as well as the effects and states of increasing the intake air or increasing the compression amount. It can change the intake area or compression area according to the internal compression state or intake state of the cylinder, thereby increasing the intake air volume during intake and increasing the compression angle and compression amount at the start of compression.

[0050] 1. The cylinder assembly described in the present invention consists of a cylinder, a sliding block, and two springs. As Figure 1 shown, a communication groove is provided on the cylinder. The sliding block can slide smoothly on the cylinder. On the side of the U-shaped groove, it is subjected to the pulling force Fr2 of the first elastic structure, and on the other side, it is subjected to the pressure Fr1 of the spring.

[0051] 2. The communication groove of the cylinder assembly of the present invention is provided at the end position of the sliding block, as Figure 2 shown.

[0052] 3. Embodiment: The initial position of the sliding block is as Figure 1 shown. At this time, the U-shaped opening shrinks, and the starting compression angle decreases (the intake air volume decreases, but it meets the intake air requirements of the cylinder, such as Figure 4 the intake air volume at the starting position is small). As Figure 2 shown. When continuous compression is carried out, the pressure in the compression chamber gradually rises. At this time, Fp1 gradually increases (the area of Fp1 is larger than the area of Fp2), and it pushes the sliding block to slide until the U-shaped groove is completely opened. As Figure 3 shown. When continuous compression is carried out until the end position of the sliding block, the communication groove is connected to the intake low pressure. At this time, Fp1 decreases, and the sliding block is pulled back by the spring Fr2 and returns to the starting position. Throughout the process, the requirement of intake air volume is met, and at the same time, the starting compression angle is reduced, improving the performance of the compressor.

[0053] In order to make the above embodiments reasonable, the following setting conditions need to be met: As Figure 2 shown: When the sliding block does not slide, Fr2 + Fp2 > Fr1 + Fp1; when the sliding block slides, Fr2 + Fp2 < Fr1 + Fp1; when the slider reaches the end, Fr2 > Fr1 + Fp1.

[0054] In some embodiments, a second groove 14 is formed on the cylinder body 11 in communication with the cylinder communication groove 4. At least a portion of the second elastic structure 5 is disposed in the second groove 14, with one end of the second elastic structure 5 connected to the inner peripheral wall of the second groove 14 and the other end connected to the protrusion 23. In the rotation direction of the roller, the second groove 14 is located at the upstream end of the cylinder communication groove 4. This disclosure also allows the second groove to accommodate at least a portion of the second elastic structure, thereby applying pressure to the protrusion through the second elastic structure to push the slider in a direction that increases the suction area of ​​the suction port. The second elastic structure is preferably a spring.

[0055] In some embodiments, the protrusion 23 is a structure connected to the radial outer periphery of the sliding portion 2 and extending radially outward. This is a preferred structural form of the protrusion of this disclosure, which can effectively form a working area in the circumferential direction, and its working area is larger than the area of ​​the second end, and can connect with the second elastic structure to bear the elastic force.

[0056] In some embodiments, when a sliding vane groove 13 is included: within the cylinder cross-section, the cylinder body 11 is divided into two semi-annular portions by the extending direction of the sliding vane groove 13. The cylinder connecting groove 4 and the intake port 6 are located on different semi-annular portions, respectively. An exhaust port is also provided on the cylinder body 11, and the exhaust port is located on the same semi-annular portion as the cylinder connecting groove 4. This is the preferred setting position of the cylinder connecting groove of this disclosure, that is, it is set on the same semi-annular portion as the exhaust port. This allows the roller to be in the initial compression state when it rotates to the intake chamber and connects with the cylinder connecting groove. When the roller rotates to the intake chamber and the pressure rises, it becomes a compression chamber and connects with the cylinder connecting groove. At this time, the next intake chamber begins to draw air and needs to increase the intake area. Therefore, by setting the cylinder connecting groove, the sliding part can be automatically driven to move according to the needs of intake and compression, so as to simultaneously increase the intake volume and compression volume.

[0057] In some embodiments, the sliding part 2 extends axially along the cylinder. Within the cross-section of the cylinder, the sliding part 2 is an arc-shaped ring structure, and its radial outer periphery fits against the radial inner periphery of the cylinder body 11. The sliding part 2 can slide along the circumferential direction of the cylinder on the inner circumferential surface of the cylinder body 11. This is a preferred structural form of the sliding part in this disclosure. It fits against the radial inner circumferential surface of the cylinder body, thereby forming a new cylinder cavity on the inner periphery of the sliding part. The size of the cylinder cavity can be controlled to change through the sliding part, mainly controlling the size of the intake area of ​​the intake port to change as needed.

[0058] This disclosure also provides a compressor that includes the cylinder assembly described in the previous one.

[0059] The above description is merely a preferred embodiment of this disclosure and is not intended to limit this disclosure. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this disclosure should be included within the protection scope of this disclosure. The above description is only a preferred embodiment of this disclosure. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this disclosure, and these improvements and modifications should also be considered within the protection scope of this disclosure.

Claims

1. A cylinder assembly, characterized in that: include: The cylinder (1) and the sliding part (2) are provided. The cylinder (1) includes a cylinder body (11), a cylinder cavity (12) and an air intake (6). The cylinder cavity (12) is located on the inner periphery of the cylinder body (11), and the air intake (6) is located on the cylinder body (11). The air intake (6) is connected to the cylinder cavity (12). The sliding part (2) is disposed in the cylinder cavity (12). At the initial compression, the sliding part (2) can move to cover at least part of the air intake (6) or increase the area of ​​the air intake (6). When it is necessary to increase the intake volume, the sliding part (2) can move to increase the intake area of ​​the air intake (6). The sliding part (2) includes a first end (21) and a second end (22) along the circumferential direction of the cylinder. The intake port (6) includes a first groove (61) opened on the axial end face of the cylinder body (11). A first elastic structure (3) is connected to the inner wall of the first groove (61). The other end of the first elastic structure (3) is connected to the first end (21) of the sliding part (2). The first elastic structure (3) can apply an elastic force to the sliding part (2) in a direction that increases the area of ​​the first groove (61). A cylinder connecting groove (4) is also provided on the cylinder body (11) corresponding to the second end (22) in the circumferential direction of the sliding part (2). The cylinder connecting groove (4) can communicate with the cylinder cavity (12) to introduce gas. When compression is initially performed, the cylinder cavity (12) communicating with the cylinder connecting groove (4) is the intake cavity. The gas in the intake cavity enters the cylinder connecting groove (4) and acts on the sliding part (2). The combined force of the gas pressure and the elastic force on the sliding part (2) The sliding part (2) is driven to move under the action to cover at least part of the air intake (6) or increase the area of ​​the air intake (6). When it is necessary to increase the intake volume, the cylinder chamber (12) connected to the cylinder communication groove (4) is a compression chamber. The gas in the compression chamber enters the cylinder communication groove (4) to act on the sliding part (2). Under the combined force of the gas pressure and elasticity of the sliding part (2), the sliding part (2) can move to increase the intake area of ​​the air intake (6).

2. The cylinder assembly according to claim 1, characterized in that: The first elastic structure (3) is a spring, which can apply elastic tension to the sliding part (2); in the cross-section of the cylinder, the first groove (61) is a U-shaped groove; the first groove (61) extends from one end of the cylinder to the other end along the axial direction.

3. The cylinder assembly according to claim 1, characterized in that: The cylinder body (11) is also provided with a sliding plate groove (13), in which a sliding plate (7) is provided. The position on the inner wall of the first groove (61) and connected to the first elastic structure (3) is closer to the sliding plate groove (13) in the circumferential direction of the cylinder than other positions of the first groove (61).

4. The cylinder assembly according to claim 1, characterized in that: In the circumferential direction of the cylinder, the central angle between the first end (21) and the second end (22) of the sliding part (2) in the circumferential direction is α, and α > 180°.

5. The cylinder assembly according to claim 1, characterized in that: The sliding part (2) is further provided with a protrusion (23) near the second end (22). A second elastic structure (5) is connected to the protrusion (23). The second elastic structure (5) acts on the protrusion (23) to apply an elastic force Fr1 to push the protrusion (23) toward the second end (22).

6. The cylinder assembly according to claim 5, characterized in that: The gas in the cylinder cavity (12) can enter the cylinder connecting groove (4) to act on the protrusion (23) and the second end (22). The pressure direction of the gas acting on the protrusion (23) is the direction that drives the sliding part (2) to increase the suction area of ​​the air intake (6). The pressure direction of the gas acting on the second end (22) is the direction that drives the sliding part (2) to decrease the suction area of ​​the air intake (6). In a plane perpendicular to the circumferential direction of the cylinder, the area of ​​the gas acting on the protrusion (23) is greater than the area of ​​the gas acting on the second end (22).

7. The cylinder assembly according to claim 6, characterized in that: The force exerted by the gas in the cylinder cavity on the protrusion (23) is Fp1, the force exerted by the gas in the cylinder cavity on the second end (22) is Fp2, the elastic force exerted by the second elastic structure (5) on the protrusion (23) is Fr1, and the elastic force exerted by the first elastic structure (3) on the first end (21) is Fr2. When the roller rotates to the cylinder cavity at the initial compression stage, the cylinder cavity (12) connected to the cylinder communication groove (4) is the intake cavity, and Fr2+Fp2>Fr1+Fp1. The sliding part (2) moves to reduce the initial compression angle. As the roller rotates, when the pressure of the cylinder cavity (12) connected to the cylinder communication groove (4) increases to a preset value, Fr2+Fp2<Fr1+Fp1. The sliding part (2) moves to increase the intake port. As the roller continues to rotate, when the sliding part (2) slides to the second end (22) and abuts against the peripheral wall of the cylinder communication groove (4), the cylinder communication groove (4) is connected to the intake cavity, Fp2=0, Fr2>Fr1+Fp1. The sliding part (2) is pulled back by the first elastic structure and returns to the starting position.

8. The cylinder assembly according to claim 5, characterized in that: The cylinder body (11) is provided with a second groove (14) communicating with the cylinder communication groove (4). At least part of the second elastic structure (5) is disposed in the second groove (14), and one end of the second elastic structure (5) is connected to the inner peripheral wall of the second groove (14) and the other end is connected to the protrusion (23). In the rotation direction of the roller, the second groove (14) is located at the upstream end of the cylinder communication groove (4).

9. The cylinder assembly according to claim 5, characterized in that: The protrusion (23) is a structure that is connected to the radial outer periphery of the sliding part (2) and extends radially outward.

10. The cylinder assembly according to claim 3, characterized in that: Within the cross-section of the cylinder, the cylinder body (11) is divided into two semi-ring parts by the extension direction of the sliding vane groove (13). The cylinder connecting groove (4) and the intake port (6) are located on different semi-ring parts. The cylinder body (11) is also provided with an exhaust port, which is located on the same semi-ring part as the cylinder connecting groove (4).

11. The cylinder assembly according to any one of claims 1-10, characterized in that: The sliding part (2) is a structure that extends along the axial direction of the cylinder. In the cross-section of the cylinder, the sliding part (2) is an arc-shaped ring structure, and the radial outer periphery of the sliding part (2) is fitted with the radial inner periphery of the cylinder body (11). The sliding part (2) can slide along the circumferential direction of the cylinder on the inner circumferential surface of the cylinder body (11).

12. A compressor, characterized in that: Includes the cylinder assembly according to any one of claims 1-11.

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