Cylinder, pump body assembly, compressor and air conditioning system

Abstract

This invention provides a cylinder, a pump assembly, a compressor, and an air conditioning system. The cylinder structure includes: a cylinder body, including at least a receiving cavity for containing gas; a roller disposed within the receiving cavity and fitted onto an eccentric shaft section of a crankshaft to rotate with the crankshaft; and a sliding vane disposed within the receiving cavity and located on one side of the roller, moving along a direction close to or away from the rotation axis of the crankshaft under the drive of the roller. The side of the sliding vane away from the crankshaft is provided with a first protrusion and a second protrusion spaced apart. A first end face of the sliding vane near the first protrusion is provided with an insertion groove for engaging or disengaging with a pin assembly. A clearance groove is provided on the side of the first protrusion away from the roller, the depth of the clearance groove in the direction of movement of the sliding vane being less than the height of the first protrusion in the direction of movement of the sliding vane. This invention solves the problem of easy damage to the sliding vane in the variable displacement cylinder of a variable displacement compressor in the prior art.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and more specifically, to a cylinder, a pump assembly, a compressor, and an air conditioning system. Background Technology

[0002] Currently, most air conditioning systems use inverter compressors to adjust capacity output according to load demand. This means that the compressor frequency is adjusted to regulate capacity output. When the load on the air conditioning system is too low, the compressor frequency needs to be continuously reduced.

[0003] However, due to the limitation of the compressor's minimum operating frequency, the minimum cooling capacity that the compressor can output is restricted. When the load of the air conditioning system is less than the minimum capacity that the compressor can output at its minimum operating frequency, the compressor will frequently start and stop, resulting in high power consumption. At the same time, when the compressor frequency is too low, both the compressor's volumetric efficiency and the motor efficiency are low, which leads to low energy efficiency of the compressor during low-frequency operation. Therefore, existing technologies typically use variable frequency variable capacity compressors to solve this problem.

[0004] The common method for changing the displacement of a variable displacement compressor is to insert a pin head into the pin slot of the variable displacement vane to lock the vane, thereby reducing the compressor's displacement. However, in pursuit of miniaturization and high efficiency, variable displacement compressors typically employ a flattened design with a large eccentricity. Excessive eccentricity in the variable displacement cylinder limits the design space for the variable displacement mechanism. The tail groove of the vane in the variable displacement cylinder is prone to deformation due to its low rigidity. Therefore, a raised structure is used in the tail groove of the cylinder vane to enhance its rigidity, while the corresponding concave tail groove of the vane avoids the raised structure of the cylinder vane tail groove. Because of the pin slot on the variable displacement vane, to enhance the rigidity of the vane tail on the pin slot side and prevent breakage, both the raised structure of the cylinder tail groove and the recess of the vane tail employ asymmetrical structures. However, the phenomenon of vane tail breakage still occurs.

[0005] In addition, the switching method of variable displacement compressors, which uses a pin head to insert into the pin slot of the variable displacement vane to hold the vane, has a long-term problem of single-cylinder switching. The pin head wears a flange into the vane pin slot. Due to the high-speed reciprocating motion of the vane, the flange can easily wear a relatively deep scratch on the end face of the first flange, which leads to increased power consumption of the compressor and even causes the vane to become unstable and generate noise. Summary of the Invention

[0006] The main objective of this invention is to provide a cylinder, pump assembly, compressor, and air conditioning system to solve the problem that the sliding vanes in the variable displacement cylinder of a variable displacement compressor in the prior art are easily damaged.

[0007] To achieve the above objectives, according to a first aspect of the present invention, a cylinder structure is provided, comprising: a cylinder body including at least a receiving cavity for containing gas; a roller disposed within the receiving cavity and for being sleeved on an eccentric shaft section of a crankshaft to rotate with the crankshaft; a slide disposed within the receiving cavity and located on one side of the roller; and moving along a direction close to or away from the axis of rotation of the crankshaft under the drive of the roller; a first protrusion and a second protrusion are provided at intervals on the side of the slide away from the crankshaft, wherein a first end face of the slide near the first protrusion is provided with an insertion groove for engaging or disengaging with a pin assembly; wherein a clearance groove is provided on the side of the first protrusion away from the roller, the depth of the clearance groove in the direction of movement of the slide being less than the height of the first protrusion in the direction of movement of the slide.

[0008] Furthermore, the height of the first protrusion in the direction of movement of the slide is equal to the height of the second protrusion in the direction of movement of the slide.

[0009] Furthermore, a third protrusion protruding toward the slide is provided on the cavity wall of the receiving cavity. A first groove and a second groove are formed on opposite sides of the third protrusion for insertion or separation from the first protrusion and the second protrusion, respectively. The depths of the first groove and the second groove are equal and both are less than the height of the first protrusion in the direction of movement of the slide.

[0010] Furthermore, the width of the first groove in the direction parallel to the rotation axis of the crankshaft is greater than the width of the second groove in the direction parallel to the rotation axis of the crankshaft.

[0011] Furthermore, the insertion slot includes a second slot located on the side of the first slot near the first end face; the depth of the second slot in the direction parallel to the rotation axis of the crankshaft is less than the depth of the first slot in the direction parallel to the rotation axis of the crankshaft; the minimum cross-sectional area of ​​the second slot is greater than the maximum cross-sectional area of ​​the first slot; wherein, along the direction near the first end face, the cross-sectional area of ​​the second slot gradually increases.

[0012] Furthermore, the first groove segment is a cylindrical groove segment, the second groove segment is a conical groove segment, the minimum diameter of the second groove segment is greater than the maximum diameter of the first groove segment, and the centerline of the second groove segment is located on the side of the rotation axis away from the crankshaft of the centerline of the first groove segment.

[0013] Furthermore, the width of the clearance groove in the direction parallel to the crankshaft's rotation axis is H, and the depth of the insertion groove in the direction parallel to the crankshaft's rotation axis is h, where -0.2h ≤ (Hh) ≤ 0.2h; and / or the depth of the insertion groove in the direction parallel to the crankshaft's rotation axis is h, where h ranges from 2mm to 6mm; and / or the depth of the clearance groove in the sliding direction of the slide is V, where V ranges from 0.1mm to 2mm; and / or the width of the clearance groove in the direction parallel to the crankshaft's rotation axis is H, where H ranges from 2mm to 7mm; and / or the minimum distance L between the insertion groove and the clearance groove, where L ranges from 5mm to 10mm.

[0014] According to a second aspect of the present invention, a pump body assembly is provided, including a first cylinder having the cylinder structure described above. The pump body assembly further includes a crankshaft and a first flange. The crankshaft includes a first main shaft section and a first eccentric shaft section connected to each other. The first flange is sleeved on the first main shaft section. The first cylinder is sleeved on the first eccentric shaft section, and the opening of the insertion groove of the first cylinder is disposed facing the first flange. The first flange is provided with a pin assembly for insertion or separation from the insertion groove.

[0015] Furthermore, the first flange is provided with a mounting groove for mounting a pin assembly, the pin assembly including a pin and an elastic element, the elastic element being located on the side of the pin away from the first cylinder, and the mounting groove being provided with a pin hole on the side of the mounting groove near the first cylinder for one end of the pin to enter and exit.

[0016] Furthermore, the pin includes a first shaft and a second shaft. The first shaft is located on the side of the second shaft closer to the first cylinder. The diameter of the first shaft is smaller than the diameter of the pin hole, and the diameter of the second shaft is larger than the diameter of the pin hole. The second shaft is provided with an elastic element receiving groove and an opening located on the side of the elastic element receiving groove away from the first shaft. One end of the elastic element abuts against the bottom surface of the elastic element receiving groove through the opening, and the other end of the elastic element abuts against the bottom surface of the mounting groove.

[0017] Furthermore, the minimum cross-sectional area of ​​the side of the insertion groove closest to the first end face is greater than the maximum cross-sectional area of ​​the pin hole; and / or the pin hole is a round hole, and the minimum distance L between the insertion groove and the clearance groove is greater than the maximum diameter D of the pin hole; and / or the elastic element is a compression spring.

[0018] Furthermore, the crankshaft also includes a second main shaft section and a second eccentric shaft section connected to each other, the second main shaft section being located on the side of the second eccentric shaft section away from the first eccentric shaft section; the pump body assembly also includes: a partition plate, the partition plate being sleeved on the crankshaft and located on the side of the first cylinder away from the first flange; a second cylinder, the second cylinder being sleeved on the second eccentric shaft section and located on the side of the partition away from the first cylinder; a second flange, the second flange being sleeved on the second main shaft section; and a cover plate, the cover plate being sleeved on the first main shaft section and located on the side of the first flange away from the first cylinder.

[0019] According to a third aspect of the present invention, a compressor is provided, comprising: a housing; a pump body assembly disposed within the housing, the pump body assembly being the aforementioned pump body assembly; a motor including a stator and a rotor located within the stator, the rotor being sleeved on the crankshaft of the pump body assembly; wherein the housing is provided with: an exhaust port communicating with the interior of the housing; a first intake port communicating with a first suction port of a first cylinder of the pump body assembly; and a second intake port communicating with a second suction port of a second cylinder of the pump body assembly.

[0020] According to a fourth aspect of the present invention, an air conditioning system is provided, comprising: a compressor, wherein the compressor is the compressor described above; a distributor, the distributor including a distributor inlet, a distributor first outlet and a distributor second outlet, the distributor first outlet being connected to a first air inlet of the compressor, and the distributor second outlet being connected to a second air inlet of the compressor; an evaporator, the evaporator inlet being connected to a compressor exhaust port; a condenser, the condenser inlet being connected to an evaporator outlet and the condenser outlet being connected to a distributor inlet; and a throttling valve disposed on a connecting pipe between the evaporator outlet and the condenser inlet.

[0021] Furthermore, the air conditioning system includes: a first switching valve, the first end of which is connected to the exhaust port of the compressor, and the second end of which is connected to the first intake port of the compressor; and a second switching valve, the first end of which is connected to a connecting pipe between the outlet of the condenser and the inlet of the distributor, and the second end of which is connected to a connecting pipe between the first switching valve and the first intake port of the compressor.

[0022] According to the technical solution of the present invention, the cylinder of the present invention includes: a cylinder body, including a receiving cavity for containing gas; a roller, disposed in the receiving cavity and used to be sleeved on an eccentric shaft section of a crankshaft to rotate with the crankshaft; a slide, disposed in the receiving cavity and located on one side of the roller; to move along a direction close to or away from the rotation axis of the crankshaft under the drive of the roller; a first protrusion and a second protrusion are provided at intervals on the side of the slide away from the crankshaft, wherein a first end face of the slide near the first protrusion is provided with an insertion groove for insertion or separation with a pin assembly; wherein a clearance groove is provided on the side of the first protrusion away from the roller, the depth of the clearance groove in the movement direction of the slide is less than the height of the first protrusion in the movement direction of the slide. Thus, by optimizing the cylinder structure, this invention solves the problem of scratches easily appearing on the first flange end face due to the flanged edge of the pin groove of the variable displacement vane. It also avoids the phenomenon that the tail of the variable displacement vane, during reciprocating motion, will collide with the edge of the pin hole due to being suspended and tilted at the pin hole. Furthermore, it avoids the formation of an impact arm between the lower end of the vane tail and the pin groove when the tail of the variable displacement vane collides with the cylinder vane tail groove. This also prevents fatigue fracture caused by repeated impacts between the tail of the variable displacement vane and the cylinder vane tail groove. This invention solves the problem of easy damage to the vane in the variable displacement cylinder of the existing variable displacement compressor, improves the reliability of the tail of the variable displacement vane, improves the reliability of the cylinder, and enables the variable displacement compressor to maintain a high-efficiency and stable operating state for a long time. Attached Figure Description

[0023] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0024] Figure 1 A schematic diagram of an embodiment of the air conditioning system of the present invention is shown;

[0025] Figure 2 It shows Figure 1 A partial structural diagram of the compressor pump assembly of the air conditioning system shown;

[0026] Figure 3 It shows Figure 2 A magnified view of a portion of point A in the middle;

[0027] Figure 4 It shows Figure 2 A schematic diagram of the pin structure of the pump body assembly shown;

[0028] Figure 5 It shows Figure 2 A schematic diagram of the structure of the cylinder vane of the pump body assembly shown;

[0029] Figure 6 It shows Figure 5 A magnified view of a portion of point B in the middle.

[0030] The above figures include the following reference numerals:

[0031] 1. Cylinder block; 2. Receiving cavity; 3. Roller; 4. Crankshaft; 41. First main shaft section; 42. First eccentric shaft section; 43. Second main shaft section; 44. Second eccentric shaft section; 5. Sliding vane; 51. First protrusion; 52. Second protrusion; 53. Insertion groove; 531. First groove section; 532. Second groove section; 54. Clearance groove; 6. Pin assembly; 7. Third protrusion; 71. First recessed section; 72. Second recessed section; 8. First cylinder; 9. First flange; 11. Mounting groove; 12. Pin; 121. First shaft body; 122. Second shaft body; 123. Spring 13. Elastic component; 14. Pin hole; 15. Partition; 16. Second cylinder; 17. Second flange; 18. Cover plate; 19. Housing; 191. Exhaust port; 192. First air inlet; 193. Second air inlet; 20. Pump body assembly; 21. Motor; 211. Stator; 212. Rotor; 22. Compressor; 23. Distributor; 231. Distributor inlet; 232. Distributor first outlet; 233. Distributor second outlet; 24. Evaporator; 25. Condenser; 26. Throttling valve; 27. First switching valve; 28. Second switching valve. Detailed Implementation

[0032] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0033] The present invention will now be described in detail with reference to the accompanying drawings and embodiments:

[0034] like Figures 1 to 6 As shown, the present invention provides a cylinder, comprising: a cylinder body 1, including a receiving cavity 2 for containing gas; a roller 3, disposed within the receiving cavity 2 and used to be sleeved on an eccentric shaft section of a crankshaft 4 to rotate with the crankshaft 4; a slide 5, disposed within the receiving cavity 2 and located on one side of the roller 3, to move along a direction close to or away from the rotation axis of the crankshaft 4 under the drive of the roller 3; a first protrusion 51 and a second protrusion 52 are provided at intervals on the side of the slide 5 away from the crankshaft 4, wherein a first end face of the slide 5 near the first protrusion 51 is provided with an insertion groove 53 for insertion or separation with a pin assembly 6; wherein a clearance groove 54 is provided on the side of the first protrusion 51 away from the roller 3, the depth of the clearance groove 54 in the direction of movement of the slide 5 is less than the height of the first protrusion 51 in the direction of movement of the slide 5.

[0035] Thus, by optimizing the cylinder structure, this invention solves the problem of scratches easily appearing on the first flange end face due to the flanged edge of the pin groove of the variable displacement vane. It also avoids the phenomenon that the tail of the variable displacement vane, during reciprocating motion, will collide with the edge of the pin hole due to being suspended and tilted at the pin hole. Furthermore, it avoids the formation of an impact arm between the lower end of the vane tail and the pin groove when the tail of the variable displacement vane collides with the cylinder vane tail groove. This also prevents fatigue fracture caused by repeated impacts between the tail of the variable displacement vane and the cylinder vane tail groove. This invention solves the problem of easy damage to the vane in the variable displacement cylinder of the existing variable displacement compressor, improves the reliability of the tail of the variable displacement vane, improves the reliability of the cylinder, and enables the variable displacement compressor to maintain a high-efficiency and stable operating state for a long time.

[0036] Specifically, the side of the slide 5 closest to the roller 3 is the head of the slide 5, and the side of the slide 5 furthest from the roller 3 is the tail of the slide 5. The height of the first protrusion 51 in the direction of movement of the slide 5 is equal to the height of the second protrusion 52 in the direction of movement of the slide 5.

[0037] like Figure 2 As shown, a third protrusion 7 protruding towards the slide plate 5 is provided on the cavity wall surface of the receiving cavity 2. A first groove 71 and a second groove 72 are formed on opposite sides of the third protrusion 7 for insertion or separation from the first protrusion 51 and the second protrusion 52, respectively. The depths of the first groove 71 and the second groove 72 are equal and both are less than the height of the first protrusion 51 in the direction of movement of the slide plate 5.

[0038] Preferably, the width of the first groove 71 in the direction parallel to the rotation axis of the crankshaft 4 is greater than the width of the second groove 72 in the direction parallel to the rotation axis of the crankshaft 4, and the width of the first protrusion 51 in the direction parallel to the rotation axis of the crankshaft 4 is greater than the width of the second protrusion 52 in the direction parallel to the rotation axis of the crankshaft 4, so as to enhance the rigidity of the first protrusion 51 and thereby prevent the tail of the slide 5 from being broken off.

[0039] like Figure 6 As shown, the insertion slot 53 includes a first slot segment 531 and a second slot segment 532 located on the side of the first slot segment 531 near the first end face; the depth of the second slot segment 532 in the direction parallel to the rotation axis of the crankshaft 4 is less than the depth of the first slot segment 531 in the direction parallel to the rotation axis of the crankshaft 4; the minimum cross-sectional area of ​​the second slot segment 532 is greater than the maximum cross-sectional area of ​​the first slot segment 531; wherein, along the direction near the first end face, the cross-sectional area of ​​the second slot segment 532 gradually increases.

[0040] Specifically, the first groove segment 531 is a cylindrical groove segment, and the second groove segment 532 is a conical groove segment. The minimum diameter of the second groove segment 532 is greater than the maximum diameter of the first groove segment 531. The center line of the second groove segment 532 is located on the side of the center line of the first groove segment 531 away from the rotation axis of the crankshaft 4, so as to avoid the flange ground out by the edge of the insertion groove 53 from contacting the upper end face of the first flange 9. This solves the problem that the end face of the first flange is easily scratched, improves the reliability of the variable capacity mechanism of the compressor, and enables the variable capacity compressor to maintain efficient and stable operation for a long time.

[0041] like Figure 6 As shown, the width of the clearance groove 54 in the direction parallel to the rotation axis of the crankshaft 4 is H, and the depth of the insertion groove 53 in the direction parallel to the rotation axis of the crankshaft 4 is h, wherein -0.2h ≤ (Hh) ≤ 0.2h, to avoid forming a large suspended impact arm, solving the problem that the tail of the variable displacement vane and the cylinder vane tail groove are prone to fatigue fracture due to repeated impacts, and improving the reliability of the tail of the variable displacement vane; and / or the insertion groove 53 in the direction parallel to the rotation axis of the crankshaft 4 is H. The depth in the direction is h, where h ranges from 2 mm to 6 mm; and / or the depth of the clearance groove 54 in the direction of movement of the slide 5 is V, where V ranges from 0.1 mm to 2 mm; and / or the width of the clearance groove 54 in the direction parallel to the rotation axis of the crankshaft 4 is H, where H ranges from 2 mm to 7 mm; and / or the minimum distance L between the insertion groove 53 and the clearance groove 54, where L ranges from 5 mm to 10 mm.

[0042] like Figure 1 As shown, the present invention provides a pump body assembly, including a first cylinder 8, which has the cylinder structure described above. The pump body assembly also includes a crankshaft 4 and a first flange 9. The crankshaft 4 includes a first main shaft section 41 and a first eccentric shaft section 42 connected to each other. The first flange 9 is sleeved on the first main shaft section 41, and the first cylinder 8 is sleeved on the first eccentric shaft section 42. The opening of the insertion groove 53 of the first cylinder 8 is oriented towards the first flange 9. The first flange 9 is provided with a pin assembly 6 for insertion or separation from the insertion groove 53.

[0043] like Figure 3 As shown, the first flange 9 is provided with a mounting groove 11 for mounting the pin assembly 6. The pin assembly 6 includes a pin 12 and an elastic element 13. The elastic element 13 is located on the side of the pin 12 away from the first cylinder 8. The mounting groove 11 is provided with a pin hole 14 on the side near the first cylinder 8 for one end of the pin 12 to enter and exit.

[0044] like Figure 4As shown, the pin 12 includes a first shaft 121 and a second shaft 122. The first shaft 121 is located on the side of the second shaft 122 closer to the first cylinder 8. The diameter of the first shaft 121 is smaller than the diameter of the pin hole 14, and the diameter of the second shaft 122 is larger than the diameter of the pin hole 14. The second shaft 122 is provided with an elastic element receiving groove 123 and an opening on the side of the elastic element receiving groove 123 away from the first shaft 121. One end of the elastic element 13 abuts against the bottom surface of the elastic element receiving groove 123 through the opening, and the other end of the elastic element 13 abuts against the bottom surface of the mounting groove 11.

[0045] Preferably, the minimum cross-sectional area of ​​the side of the insertion groove 53 closest to the first end face is greater than the maximum cross-sectional area of ​​the pin hole 14; and / or the pin hole 14 is a round hole, and the minimum distance L between the insertion groove 53 and the clearance groove 54 is greater than the maximum diameter D of the pin hole 14, so as to avoid the tail of the variable displacement slide from being suspended and tilted at the pin hole during the reciprocating motion and hitting the edge of the pin hole, thereby improving the reliability of the variable displacement mechanism; and / or the elastic element 13 is a compression spring.

[0046] Specifically, the crankshaft 4 also includes a second main shaft section 43 and a second eccentric shaft section 44 connected to each other, the second main shaft section 43 being located on the side of the second eccentric shaft section 44 away from the first eccentric shaft section 42; the pump body assembly also includes: a partition 15, the partition 15 being sleeved on the crankshaft 4 and located on the side of the first cylinder 8 away from the first flange 9; a second cylinder 16, the second cylinder 16 being sleeved on the second eccentric shaft section 44 and located on the side of the partition 15 away from the first cylinder 8; a second flange 17, the second flange 17 being sleeved on the second main shaft section 43; and a cover plate 18, the cover plate 18 being sleeved on the first main shaft section 41 and located on the side of the first flange 9 away from the first cylinder 8.

[0047] like Figure 1 As shown, the present invention provides a compressor, comprising: a housing 19; a pump body assembly 20 disposed within the housing 19, the pump body assembly 20 being the aforementioned pump body assembly; a motor 21, the motor 21 comprising a stator 211 and a rotor 212 located within the stator 211, the rotor 212 being sleeved on the crankshaft 4 of the pump body assembly 20; wherein, the housing 19 is provided with: an exhaust port 191 communicating with the interior of the housing 19; a first air inlet 192 communicating with the first intake port of the first cylinder 8 of the pump body assembly 20; and a second air inlet 193 communicating with the second intake port of the second cylinder 16 of the pump body assembly 20.

[0048] The head of the vane 5 abuts against the outer circumferential surface of the roller 3 to divide the volume chamber in the first cylinder 8 into a high-pressure chamber and a low-pressure chamber, thereby realizing the compression function of the compressor. The cavity where the tail of the vane 5 of the first cylinder 8 (i.e., the variable displacement cylinder) is located is sealed and not connected to the high-pressure gas in the housing 19. The first air inlet 192 is connected to the cavity where the tail of the vane 5 is located.

[0049] The compressor 22 of the present invention has a housing 19 comprising a main housing and an upper cover and a lower cover located at the upper and lower ends of the main housing, respectively, to form a sealed cavity.

[0050] like Figure 1 As shown, the present invention provides an air conditioning system, comprising: a compressor 22, wherein the compressor 22 is the compressor described above; a distributor 23, wherein the distributor 23 includes a distributor inlet 231, a distributor first outlet 232 and a distributor second outlet 233, wherein the distributor first outlet 232 is connected to the first air inlet 192 of the compressor 22 and the distributor second outlet 233 is connected to the second air inlet 193 of the compressor 22; an evaporator 24, wherein the inlet of the evaporator 24 is connected to the exhaust port 191 of the compressor 22; a condenser 25, wherein the inlet of the condenser 25 is connected to the outlet of the evaporator 24 and the outlet of the condenser 25 is connected to the distributor inlet 231; and a throttle valve 26 disposed on a connecting pipe between the outlet of the evaporator 24 and the inlet of the condenser 25.

[0051] Specifically, the air conditioning system of the present invention further includes: a first switching valve 27, the first end of which is connected to the exhaust port 191 of the compressor 22, and the second end of which is connected to the first air inlet 192 of the compressor 22; and a second switching valve 28, the first end of which is connected to the connecting pipe between the outlet of the condenser 25 and the inlet 231 of the distributor, and the second end of which is connected to the connecting pipe between the first switching valve 27 and the first air inlet 192 of the compressor 22.

[0052] The first switching valve 27 is a high-pressure solenoid valve used to control the connection and disconnection between the exhaust port 191 and the cavity where the tail of the slide plate 5 is located; the second switching valve 28 is a low-pressure solenoid valve used to control the connection and disconnection between the first air inlet 192 and the cavity where the tail of the slide plate 5 is located.

[0053] During the operation of the compressor, if the first switch valve 27 is opened and the second switch valve 28 is closed, the pin 12 will be pushed downward by the high-pressure exhaust to disengage from the vane 5, and the compressor will operate in dual-cylinder mode; if the second switch valve 28 is opened and the first switch valve 27 is closed, the pin 12 will be pushed up by the pin spring to be inserted into the insertion slot 53, so that the vane 5 stops working, and the compressor will operate in single-cylinder mode.

[0054] This invention is applicable not only to dual-rotor variable displacement compressors, but also to multi-rotor variable displacement compressors.

[0055] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0056] The cylinder of the present invention includes: a cylinder body 1, including a receiving cavity 2 for containing gas; a roller 3, disposed in the receiving cavity 2 and used to be sleeved on an eccentric shaft section of a crankshaft 4 to rotate with the crankshaft 4; a slide 5, disposed in the receiving cavity 2 and located on one side of the roller 3, to move along a direction close to or away from the rotation axis of the crankshaft 4 under the drive of the roller 3; a first protrusion 51 and a second protrusion 52 are provided at intervals on the side of the slide 5 away from the crankshaft 4, wherein a first end face of the slide 5 near the first protrusion 51 is provided with an insertion groove 53 for insertion or separation with a pin assembly 6; wherein a clearance groove 54 is provided on the side of the first protrusion 51 away from the roller 3, the depth of the clearance groove 54 in the direction of movement of the slide 5 is less than the height of the first protrusion 51 in the direction of movement of the slide 5. Thus, by optimizing the cylinder structure, this invention solves the problem of scratches easily appearing on the first flange end face due to the flanged edge of the pin groove of the variable displacement vane. It also avoids the phenomenon that the tail of the variable displacement vane, during reciprocating motion, will collide with the edge of the pin hole due to being suspended and tilted at the pin hole. Furthermore, it avoids the formation of an impact arm between the lower end of the vane tail and the pin groove when the tail of the variable displacement vane collides with the cylinder vane tail groove. This also prevents fatigue fracture caused by repeated impacts between the tail of the variable displacement vane and the cylinder vane tail groove. This invention solves the problem of easy damage to the vane in the variable displacement cylinder of the existing variable displacement compressor, improves the reliability of the tail of the variable displacement vane, improves the reliability of the cylinder, and enables the variable displacement compressor to maintain a high-efficiency and stable operating state for a long time.

[0057] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0058] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0059] In the description of this application, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0060] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0061] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be construed as limiting the scope of protection of this application.

[0062] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A cylinder structure, characterized in that, include: The cylinder (1) includes at least a receiving cavity (2) for containing gas; Roller (3) is disposed in the receiving cavity (2) and is used to be sleeved on the eccentric shaft section of the crankshaft (4) to rotate with the crankshaft (4); A slide (5) is disposed in the receiving cavity (2) and located on one side of the roller (3); it moves along the rotation axis of the crankshaft (4) under the drive of the roller (3); a first protrusion (51) and a second protrusion (52) are provided at intervals on the side of the slide (5) away from the crankshaft (4), wherein a first end face of the slide (5) near the first protrusion (51) is provided with an insertion groove (53) for insertion or separation with the pin assembly (6); Wherein, a relief groove (54) is provided on the side of the first protrusion (51) away from the roller (3), and the depth of the relief groove (54) in the direction of movement of the slide (5) is less than the height of the first protrusion (51) in the direction of movement of the slide (5). The cavity wall of the receiving cavity (2) is provided with a third protrusion (7) protruding toward the slide (5). The opposite sides of the third protrusion (7) form a first groove (71) and a second groove (72) for insertion or separation from the first protrusion (51) and the second protrusion (52), respectively. The depths of the first groove (71) and the second groove (72) are equal and both are less than the height of the first protrusion (51) in the direction of movement of the slide (5). The width of the first groove (71) in the direction parallel to the rotation axis of the crankshaft (4) is greater than the width of the second groove (72) in the direction parallel to the rotation axis of the crankshaft (4); The height of the first protrusion (51) in the direction of movement of the slide (5) is equal to the height of the second protrusion (52) in the direction of movement of the slide (5); The insertion slot (53) includes a first slot segment (531) and a second slot segment (532) located on the side of the first slot segment (531) near the first end face. The depth of the second groove segment (532) in the direction parallel to the rotation axis of the crankshaft (4) is less than the depth of the first groove segment (531) in the direction parallel to the rotation axis of the crankshaft (4); The minimum cross-sectional area of ​​the second groove segment (532) is greater than the maximum cross-sectional area of ​​the first groove segment (531); In particular, along the direction close to the first end face, the cross-sectional area of ​​the second groove segment (532) gradually increases.

2. The cylinder structure according to claim 1, characterized in that, The first groove segment (531) is a cylindrical groove segment, and the second groove segment (532) is a conical groove segment. The minimum diameter of the second groove segment (532) is greater than the maximum diameter of the first groove segment (531). The center line of the second groove segment (532) is located on the side of the center line of the first groove segment (531) away from the rotation axis of the crankshaft (4).

3. The cylinder structure according to claim 1, characterized in that, The width of the clearance groove (54) in the direction parallel to the rotation axis of the crankshaft (4) is H, and the depth of the insertion groove (53) in the direction parallel to the rotation axis of the crankshaft (4) is h, wherein -0.2h ≤ (Hh) ≤ 0.2h; and / or The depth of the insertion groove (53) in the direction parallel to the rotation axis of the crankshaft (4) is h, wherein the value of h ranges from 2 mm to 6 mm; and / or The depth of the clearance groove (54) in the direction of movement of the slide (5) is V, wherein the value of V ranges from 0.1 mm to 2 mm; and / or The width of the clearance groove (54) in the direction parallel to the rotation axis of the crankshaft (4) is H, wherein the value of H ranges from 2 mm to 7 mm; and / or The minimum distance L between the insertion slot (53) and the clearance slot (54) is 5mm to 10mm.

4. A pump body assembly, characterized in that, The pump assembly includes a first cylinder (8), which is a cylinder structure according to any one of claims 1 to 3. The pump body assembly also includes a crankshaft (4) and a first flange (9). The crankshaft (4) includes a first main shaft section (41) and a first eccentric shaft section (42) connected to each other. The first flange (9) is sleeved on the first main shaft section (41). The first cylinder (8) is sleeved on the first eccentric shaft section (42). The opening of the insertion groove (53) of the first cylinder (8) is arranged facing the first flange (9). The first flange (9) is provided with the pin assembly (6) for insertion or separation from the insertion groove (53).

5. The pump body assembly according to claim 4, characterized in that, The first flange (9) is provided with a mounting groove (11) for mounting the pin assembly (6). The pin assembly (6) includes a pin (12) and an elastic element (13). The elastic element (13) is located on the side of the pin (12) away from the first cylinder (8). The mounting groove (11) is provided with a pin hole (14) on the side of the mounting groove (11) near the first cylinder (8) for one end of the pin (12) to enter and exit.

6. The pump body assembly according to claim 5, characterized in that, The pin (12) includes a first shaft (121) and a second shaft (122). The first shaft (121) is located on the side of the second shaft (122) closer to the first cylinder (8). The diameter of the first shaft (121) is smaller than the diameter of the pin hole (14), and the diameter of the second shaft (122) is larger than the diameter of the pin hole (14). The second shaft (122) is provided with an elastic element receiving groove (123) and an opening on the side of the elastic element receiving groove (123) away from the first shaft (121). One end of the elastic element (13) abuts against the bottom surface of the elastic element receiving groove (123) through the opening, and the other end of the elastic element (13) abuts against the bottom surface of the mounting groove (11).

7. The pump body assembly according to claim 5, characterized in that, The minimum cross-sectional area of ​​the insertion slot (53) on the side closest to the first end face is greater than the maximum cross-sectional area of ​​the pin hole (14); and / or The pin hole (14) is a round hole, and the minimum distance L between the insertion groove (53) and the clearance groove (54) is greater than the maximum diameter D of the pin hole (14); and / or The elastic element (13) is a compression spring.

8. The pump body assembly according to claim 4, characterized in that, The crankshaft (4) further includes a second main shaft section (43) and a second eccentric shaft section (44) connected thereto, the second main shaft section (43) being located on the side of the second eccentric shaft section (44) away from the first eccentric shaft section (42); the pump body assembly further includes: A partition (15) is sleeved on the crankshaft (4) and located on the side of the first cylinder (8) away from the first flange (9); The second cylinder (16) is sleeved on the second eccentric shaft section (44) and located on the side of the partition (15) away from the first cylinder (8); The second flange (17) is fitted onto the second main shaft section (43); Cover plate (18), which is sleeved on the first spindle section (41) and located on the side of the first flange (9) away from the first cylinder (8).

9. A compressor, characterized in that, include: Shell (19); Pump body assembly (20), the pump body assembly (20) being disposed within the housing (19), the pump body assembly (20) being the pump body assembly according to any one of claims 4 to 8; The motor (21) includes a stator (211) and a rotor (212) located within the stator (211), the rotor (212) being mounted on the crankshaft (4) of the pump body assembly (20); The housing (19) is provided with: An exhaust port (191) is connected to the interior of the housing (19); The first air inlet (192) is connected to the first intake port of the first cylinder (8) of the pump body assembly (20); The second air inlet (193) is connected to the second intake port of the second cylinder (16) of the pump body assembly (20).

10. An air conditioning system, characterized in that, include: The compressor (22) is the compressor according to claim 9; The liquid distributor (23) includes a liquid distributor inlet (231), a liquid distributor first outlet (232) and a liquid distributor second outlet (233). The liquid distributor first outlet (232) is connected to the first air inlet (192) of the compressor (22), and the liquid distributor second outlet (233) is connected to the second air inlet (193) of the compressor (22). Evaporator (24), the inlet of which is connected to the exhaust port (191) of the compressor (22); The condenser (25) has its inlet connected to the outlet of the evaporator (24) and its outlet connected to the inlet (231) of the distributor. A throttle valve (26) is provided on the connecting pipe between the outlet of the evaporator (24) and the inlet of the condenser (25).

11. The air conditioning system according to claim 10, characterized in that, The air conditioning system includes: A first switching valve (27) is connected at its first end to the exhaust port (191) of the compressor (22), and at its second end to the first intake port (192) of the compressor (22). The second switching valve (28) has its first end connected to the connecting pipe between the outlet of the condenser (25) and the inlet (231) of the distributor, and its second end connected to the connecting pipe between the first switching valve (27) and the first air inlet (192) of the compressor (22).

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