Cylinders, pump assembly, compressor and air conditioner

Abstract

This invention provides a cylinder, a pump body assembly, a compressor, and an air conditioner. The cylinder includes: a cylinder body having a vane groove; a thickened portion located on the outer periphery of the side of the cylinder body with the vane groove, the vane groove extending into the thickened portion; and a clearance structure for avoiding a grinding wheel provided on the axial end face of the thickened portion, the clearance structure communicating with the tail end of the vane groove. This invention solves the problem that the existing grinding wheel milling method is unsuitable for machining vane grooves in small cylinders.

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 conditioner. Background Technology

[0002] In the field of compressor manufacturing, existing compressor cylinders typically have bottom holes, spring holes, and vane slots. The vane slots are usually machined using abrasive wheel milling. However, the trend towards smaller compressor series is increasing. With this reduction, the distance between the cylinder's outer and inner diameters decreases. If traditional abrasive wheel milling is still used, the vane slots may not be fully ground through, leading to machining failure. Therefore, the abrasive wheel milling method is unsuitable for machining vane slots in small cylinders.

[0003] In addition to the aforementioned processing issues, the small-series compressors also suffer from problems such as limited total vane length, large vane extension rate, and easy wear. Summary of the Invention

[0004] The main objective of this invention is to provide a cylinder, pump body assembly, compressor, and air conditioner to solve the problem that the existing grinding wheel milling method is not suitable for machining the vane groove of small cylinders.

[0005] To achieve the above objectives, according to one aspect of the present invention, a cylinder is provided, comprising: a cylinder body having a vane groove; a thickened portion located on the outer periphery of the side of the cylinder body having the vane groove, wherein the vane groove extends into the thickened portion, and the thickened portion is further provided with a clearance structure for avoiding a grinding wheel on the axial end face of the cylinder, the clearance structure communicating with the tail of the vane groove.

[0006] Furthermore, the end of the cavity of the clearance structure that is away from the cylinder block is spaced apart from or connected to the peripheral surface of the cylinder.

[0007] Furthermore, the clearance structure is a tool relief groove, and the thickened part also includes a groove bottom hole, through which the sliding plate groove communicates with the tool relief groove.

[0008] Furthermore, the projection of the relief groove on the axial end face of the cylinder is strip-shaped, circular, elliptical, or crescent-shaped.

[0009] Furthermore, the bottom surface of the relief groove is inclined relative to the axial end face of the cylinder body, and the inclined bottom surface extends into the cylinder body at an angle close to the center of the cylinder body.

[0010] Furthermore, along the circumference of the cylinder body, the distance between the two sides of the clearance structure is greater than or equal to the distance between the two sides of the sliding vane groove.

[0011] Furthermore, the thickened portion has a connecting area located between the bottom hole of the cylinder body and the outer peripheral surface of the thickened portion. The radial thickness at the connecting area is H1. The cylinder body also has a spring hole that extends radially and connects the bottom hole of the cylinder body with the outer peripheral surface of the thickened portion. At least a portion of the spring hole is located within the connecting area. Both end faces of the cylinder body in the axial direction have relief grooves as clearance structures. Half of the difference between the bottom of the two relief grooves and the diameter of the spring hole is H2. H1 and H2 satisfy: H1≥H2.

[0012] Furthermore, the cylinder body also has a spring hole, and the axis of the bottom hole of the cylinder body is perpendicular to the axis of the spring hole, and the spring hole is connected to the sliding vane groove through the bottom hole.

[0013] According to another aspect of the present invention, a pump body assembly is provided, comprising: the cylinder described above; and a vane slidably disposed in a vane groove of the cylinder.

[0014] Furthermore, the sliding vane has an elongated structure that allows it to extend into or retract from the cylinder body's clearance structure.

[0015] Furthermore, there is a gap of 0.1 mm to 1 mm between the surfaces of the elongated structure and the avoidance structure.

[0016] According to another aspect of the present invention, a compressor is provided, including the pump body assembly described above.

[0017] According to another aspect of the present invention, an air conditioner is provided, including the compressor described above.

[0018] By applying the technical solution of this invention, a clearance structure is provided in the thickened part. This clearance structure can avoid the grinding wheel that is processing the sliding vane groove, thereby allowing the grinding wheel to penetrate deeper into the cylinder body. This enables the grinding wheel to complete the entire sliding vane groove, avoiding the situation where some parts are not connected, ensuring the reliability of the processing. At the same time, the clearance structure does not affect the overall connection relationship of the thickened part. There is still a part of the thickened part between the two sides of the sliding vane groove, which can connect the two sides, so that the overall structural strength of the cylinder can still meet the requirements. Attached Figure Description

[0019] 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:

[0020] Figure 1 A schematic diagram of the cylinder structure according to Embodiment 1 of the present invention is shown;

[0021] Figure 2 It shows Figure 1 A sectional view;

[0022] Figure 3 A schematic diagram of the cylinder structure according to Embodiment 2 of the present invention is shown;

[0023] Figure 4 It shows Figure 3 A sectional view;

[0024] Figure 5 A schematic diagram of the slider of the present invention is shown;

[0025] Figure 6 It shows Figure 5 The slider in Figure 3 A schematic diagram of the cylinder assembly structure in the diagram;

[0026] Figure 7 It shows Figure 6 A sectional view;

[0027] Figure 8 A schematic diagram of the cylinder structure of Embodiment 3 of the present invention is shown.

[0028] The above figures include the following reference numerals:

[0029] 10. Cylinder block; 11. Sliding vane groove; 20. Thickened part; 21. Avoidance structure; 22. Groove bottom hole; 23. Connection area; 24. Spring hole; 30. Sliding vane; 31. Lengthened structure. Detailed Implementation

[0030] 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.

[0031] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0032] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this invention.

[0033] To address the problem that existing grinding methods using abrasive wheels are unsuitable for machining the vane grooves of small cylinders, this invention provides a cylinder, a pump body assembly, a compressor, and an air conditioner. The pump body assembly includes the cylinder described below, the compressor includes the pump body assembly, and the air conditioner includes the compressor.

[0034] Example 1

[0035] like Figure 1 and Figure 2 The cylinder shown includes a cylinder body 10 and a thickened portion 20. The cylinder body 10 has a vane groove 11. The thickened portion 20 is located on the outer periphery of the side of the cylinder body 10 with the vane groove 11, and the vane groove 11 extends into the thickened portion 20. The thickened portion 20 is also provided with a clearance structure 21 for avoiding a grinding wheel on the axial end face of the cylinder. The clearance structure 21 is connected to the tail of the vane groove 11.

[0036] In this embodiment, by providing a clearance structure 21 in the thickened portion 20, the clearance structure 21 can avoid the grinding wheel processing the sliding vane groove 11, thereby allowing the grinding wheel to penetrate deeper into the cylinder body 10, and thus enabling the grinding wheel to process the entire sliding vane groove 11, avoiding the situation where some parts are not connected, ensuring the reliability of processing. At the same time, the clearance structure 21 does not affect the overall connection relationship of the thickened portion 20. There is still a part of the thickened portion 20 between the two sides of the sliding vane groove 11, which can connect the two sides, so that the overall structural strength of the cylinder can still meet the requirements.

[0037] In this embodiment, the end of the cavity of the avoidance structure 21 away from the cylinder body 10 is spaced apart from the peripheral surface of the cylinder. In this way, the part of the thickened part 20 located at the avoidance structure 21 can still play a stable and reliable connection role, avoiding breakage between the two sides of the sliding plate groove 11, and ensuring that the cylinder meets the usage requirements.

[0038] In this embodiment, the clearance structure 21 is a recessed relief groove. The relief groove is formed axially to a certain depth from the end face of the cylinder body 10, thus connecting the relief groove to the end face of the cylinder body 10, allowing the grinding wheel to enter the relief groove. The thickened part 20 also includes a bottom hole 22. The sliding vane groove 11 is connected to the relief groove through the bottom hole 22. That is, along the radial direction of the cylinder, the sliding vane groove 11, the bottom hole 22, and the relief groove are arranged sequentially and are interconnected. Thus, when the grinding wheel processes the sliding vane groove 11, one end of the grinding wheel can first extend into the bottom hole 22. As the processing depth increases, the grinding wheel extends from the bottom hole 22 into the relief groove, thereby completing the processing of this part. The specific value of the relief groove depth is set to be equal to or slightly greater than the minimum depth that can avoid the grinding wheel and complete the processing, which can reduce the impact on the structural strength of the thickened part 20. Of course, the avoidance structure 21 is not limited to a groove structure; it can also be a hole structure or other structures, as long as it can avoid the grinding wheel during machining.

[0039] Preferably, the projection of the relief groove on the axial end face of the cylinder body 10 is circular, elliptical, or crescent-shaped. This simplifies the structure, facilitates machining, and allows for simultaneous machining with the groove bottom hole 22. Furthermore, it ensures effective clearance for the grinding wheel. In this embodiment, the relief groove is not connected to the outer peripheral side of the thickened portion 20, but the opposite side is connected to the groove bottom hole 22. This enhances the connection strength of the thickened portion 20 at the clearance structure 21.

[0040] In this embodiment, along the circumference of the cylinder body 10, the distance between the two sides of the clearance structure 21 is greater than or equal to the distance between the two sides of the sliding vane groove 11. That is, the width of the clearance structure 21 is greater than or equal to the width of the sliding vane groove 11, preferably the width of the clearance structure 21 is greater than the width of the sliding vane groove 11. The reason for this setting is that when the grinding wheel processes the sliding vane groove 11, the width of the processed sliding vane groove 11 is basically equal to the thickness of the grinding wheel. The clearance structure 21 needs to play a stable and reliable clearance role. Therefore, a certain gap needs to be maintained between the clearance structure 21 and the grinding wheel to prevent the grinding wheel from hitting the cylinder. Therefore, the width of the clearance structure 21 is set to be greater than the width of the sliding vane groove 11, that is, greater than the thickness of the grinding wheel. This allows the grinding wheel to form a gap with the side wall of the clearance structure 21 when processing the sliding vane groove 11, ensuring the clearance effect and ensuring the reliability of the processing.

[0041] As mentioned above, in this embodiment, the vane groove 11 and the bottom hole 22 do not simultaneously penetrate both the inner and outer sides of the cylinder body 10 along the radial direction of the cylinder. The vane groove 11 penetrates the inner wall of the cylinder body 10, while at the outer wall, there is a solid portion between the bottom hole 22 and the outer wall of the thickened portion 20, which serves to connect the left and right sides of the cylinder. This portion is the connection area 23 of the thickened portion 20. The vane groove 11 of the cylinder is connected to both sides through this connection area 23. In other words, the connection area 23 is located between the bottom hole 22 of the cylinder body 10 and the outer peripheral surface of the thickened portion 20. This connection area 23 can ensure the structural strength of the cylinder during normal use, avoid breakage, damage, etc., and ensure the safety and reliability of use.

[0042] In addition to the aforementioned slot bottom hole 22, the cylinder body 10 of this embodiment also has a spring hole 24. The spring hole 24 extends radially and communicates with the outer peripheral surface of the thickened portion 20 through the slot bottom hole 22. At least a portion of the spring hole 24 is located within the connecting region 23, and another portion extends through the slot bottom hole 22 into the slide plate groove 11, communicating with the slide plate groove 11. The diameter of the spring hole 24 is larger than the width of the slide plate groove 11, thereby forming an arc-shaped recess on both side walls of the slide plate groove 11. Since the spring hole 24 is arranged radially and the slot bottom hole 22 is arranged axially, the axis of the slot bottom hole 22 of the cylinder body 10 and the axis of the spring hole 24 are naturally perpendicular to each other. The width of the relief groove in this embodiment is basically the same as the width of the slot bottom hole 22, both of which are larger than the width of the slide plate groove 11, thereby creating a structure in which the gap gradually decreases along the radial direction of the cylinder. Of course, other structural forms can also be configured, not limited to the methods described in this embodiment.

[0043] When machining the sliding vane groove 11, the most important step is grinding through the corner between the bottom hole 22 and the spring hole 24. This is necessary to complete the machining of the sliding vane groove 11. Since it is difficult to machine the entire sliding vane groove 11 from only one side, the grinding wheel is generally milled from both ends of the cylinder body 10 along the axial direction. Based on this, this embodiment provides relief grooves on both end faces of the cylinder body 10 along the axial direction, so that the milling on both sides of the grinding wheel can avoid contact with the cylinder through the relief grooves.

[0044] In this embodiment, the radial thickness at the connecting region 23 is H1, which is the radial distance from the outer circumferential surface of the cylinder to the inner wall of the groove bottom hole 22; half the difference between the distance between the bottom surfaces of the two relief grooves at both axial ends and the diameter of the spring hole 24 is H2, which is the axial length of one of the two solid parts on the axial sides of the outer circumferential surface of the thickened part 20 at the spring hole 24. H1 and H2 preferably satisfy: H1≥H2, so that the avoidance structure 21 can avoid the grinding wheel while ensuring the structural strength at the connecting region 23.

[0045] When milling the vane groove 11 with a grinding wheel, the grinding wheel needs to mill through to the junction of the groove bottom hole 22 and the spring hole 24 to ensure that the vane groove 11 is milled through. At the same time, it is necessary to ensure that one end of the grinding wheel does not collide with the inner circle of the cylinder, and the other end does not collide with the connecting area 23. After the miniaturization, the distance between the inner and outer diameters of the cylinder is reduced. Under the premise of ensuring the spring system of the vane 30, this will make it easier for the grinding wheel to collide with the edge of the cylinder when milling through the vane groove 11. In this embodiment, the collision between the grinding wheel and the connecting area 23 of the cylinder is avoided by setting the avoidance structure 21, which ensures the reliability of grinding wheel machining of small cylinders. At the same time, the structural strength of the cylinder itself is also taken into consideration, reducing the impact of the avoidance structure 21 on the structural strength of the connecting area 23, and ensuring the structural strength of the cylinder.

[0046] This embodiment also provides a pump body assembly, including the cylinder and vane 30 described above, wherein the vane 30 is slidably disposed in the vane groove 11 of the cylinder.

[0047] In this embodiment, the clearance structure 21, besides cooperating with the grinding wheel to machine the slide groove 11, also extends the length of the slide 30. Specifically, as Figure 5 As shown, one end of the vane 30 has an elongated structure 31. The elongated structure 31 is located at the end of the vane 30 furthest from the cylinder center, and as the vane 30 moves within the vane groove 11, the elongated structure 31 can extend into or retract from the clearance structure 21 of the cylinder body 10. Thus, the maximum allowable length of the vane 30 = the length of the vane groove 11 + the diameter of the groove bottom hole 22 + the length of the relief groove, thereby increasing the design length of the vane 30, improving the vane 30 extension rate, and enhancing the compressor's energy efficiency and reliability. For details, please refer to... Figure 6 and Figure 7 ,Although Figure 6 and Figure 7 The cylinder shown is the cylinder in Embodiment 2, but its essential principle is the same.

[0048] Preferably, there is a gap of 0.1mm to 1mm between the surfaces of the extended structure 31 and the clearance structure 21; more specifically, there is a gap of 0.1mm to 1mm between the bottom surface of the relief groove and the extended structure 31. Figure 7 The distance L in the middle can prevent the sliding vane 30 from hitting the cylinder during operation, and also ensure the structural strength of the connection area 23.

[0049] Example 2

[0050] The difference from Embodiment 1 is that the form of the avoidance structure 21 is different.

[0051] like Figure 3 and Figure 4 As shown, in this embodiment, the clearance structure 21 is still a tool relief groove, but the difference is that the tool relief groove is strip-shaped and extends through the outer peripheral surface along the axial direction of the cylinder. That is to say, in this embodiment, the end of the clearance structure 21 away from the cavity of the cylinder body 10 is connected to the peripheral surface of the cylinder, that is, the tool relief groove is connected to the outer peripheral surface of the thickened part 20. In this way, the clearance space of the tool relief groove is larger, which can ensure that the grinding wheel extends further into the cylinder, and the length of the slide 30 can also be longer.

[0052] Example 3

[0053] The difference from Embodiment 2 is that the form of the avoidance structure 21 is different.

[0054] like Figure 8As shown, in this embodiment, the avoidance structure 21 is still a strip-shaped relief groove that communicates with the outer peripheral surface of the thickened portion 20. However, in this embodiment, the relief groove is an inclined groove. That is, the bottom surface of the relief groove, i.e., the bottom surface along the axial depth direction, is an inclined surface. The inclined surface is inclined relative to the axial end face of the cylinder body 10, and the inclined bottom surface is inclined in the direction close to the center of the cylinder body 10 towards the direction extending into the cylinder and away from the end face opening. Specifically, for the bottom surface of the groove on the upper end face of the cylinder, it is inclined downward in the radial inward direction, while for the bottom surface of the groove on the lower end face of the cylinder, it is inclined upward in the radial inward direction. It can also be said that the bottom surfaces of the relief grooves on the two end faces are inclined towards each other in the radial inward direction of the cylinder. In this way, the inclined surface is more compatible with the outer surface of the grinding wheel, the grinding wheel extends deeper into the cylinder, and the size of the relief groove can be smaller, the volume of the connecting area 23 is larger, and the structural strength is higher.

[0055] It should be noted that "multiple" in the above embodiments refers to at least two.

[0056] As can be seen from the above description, the embodiments of the present invention achieve the following technical effects:

[0057] 1. This solves the problem that the existing grinding wheel milling method is not suitable for machining the sliding vane groove of small cylinders;

[0058] 2. The grinding wheel can extend deeper into the cylinder, thus enabling it to complete the entire sliding vane groove, avoiding any disconnection in certain areas and ensuring the reliability of the machining process.

[0059] 3. The avoidance structure will not affect the overall connection relationship of the thickened part. There is still a part of the thickened part between the two sides of the sliding vane groove, which can connect the two sides, so that the overall structural strength of the cylinder can still meet the requirements.

[0060] Obviously, the embodiments described above are merely some, not all, embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort should fall within the scope of protection of the present invention.

[0061] 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.

[0062] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0063] 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 gas cylinder characterized by, The application relates to a cylinder (10) having a sliding vane groove (11); a thickened portion (20) is arranged at the outer periphery of the cylinder (10) on the side having the sliding vane groove (11), and the sliding vane groove (11) extends into the thickened portion (20); the thickened portion (20) is further provided with a clearance structure (21) for avoiding a grinding wheel on the axial end surface of the cylinder, and the clearance structure (21) is communicated with the tail of the sliding vane groove (11); the thickened portion (20) has a connecting area (23) between the groove bottom hole (22) of the cylinder (10) and the outer peripheral surface of the thickened portion (20), the radial thickness of the connecting area (23) is H1, the cylinder (10) further has a spring hole (24) extending in the radial direction and communicating the groove bottom hole (22) with the outer peripheral surface of the thickened portion (20), and at least a part of the spring hole (24) is located in the connecting area (23); both axial end surfaces of the cylinder (10) have a tool withdrawal groove as the clearance structure, and the distance between the groove bottoms of the two tool withdrawal grooves is half of the difference between the diameter of the spring hole (24) and H2, and H1 and H2 satisfy the condition H1>=H2; the clearance structure (21) is a tool withdrawal groove, the groove bottom surface of the tool withdrawal groove is arranged in an inclined manner relative to the axial end surface of the cylinder (10), and the inclined groove bottom surface extends in the direction close to the center of the cylinder (10) and extends into the cylinder; the sliding vane groove (11) is communicated with the tool withdrawal groove through the groove bottom hole (22), when the sliding vane groove (11) is machined, one end of a machining tool is first inserted into the groove bottom hole (22), and with the increase of the machining depth, the machining tool is inserted into the tool withdrawal groove from the groove bottom hole (22). The end of the clearance structure (21) away from the cavity of the cylinder (10) is spaced apart from or communicated with the peripheral surface of the cylinder. The projection of the tool withdrawal groove on the axial end surface of the cylinder (10) is in the shape of a strip, a circle, an ellipse or a crescent. The distance between the two sides of the clearance structure (21) along the circumferential direction of the cylinder (10) is greater than or equal to the distance between the two sides of the sliding vane groove (11). The cylinder (10) further has a spring hole (24), and the axis of the groove bottom hole (22) of the cylinder (10) is arranged perpendicularly to the axis of the spring hole (24), and the spring hole (24) is communicated with the sliding vane groove (11) through the groove bottom hole (22). The application relates to a cylinder (10) having a sliding vane groove (11); a thickened portion (20) is arranged at the outer periphery of the cylinder (10) on the side having the sliding vane groove (11), and the sliding vane groove (11) extends into the thickened portion (20); the thickened portion (20) is further provided with a clearance structure (21) for avoiding a grinding wheel on the axial end surface of the cylinder, and the clearance structure (21) is communicated with the tail of the sliding vane groove (11); the thickened portion (20) has a connecting area (23) between the groove bottom hole (22) of the cylinder (10) and the outer peripheral surface of the thickened portion (20), the radial thickness of the connecting area (23) is H1, the cylinder (10) further has a spring hole (24) extending in the radial direction and communicating the groove bottom hole (22) with the outer peripheral surface of the thickened portion (20), and at least a part of the spring hole (24) is located in the connecting area (23); both axial end surfaces of the cylinder (10) have a tool withdrawal groove as the clearance structure, and the distance between the groove bottoms of the two tool withdrawal grooves is half of the difference between the diameter of the spring hole (24) and H2, and H1 and H2 satisfy the condition H1>=H2; the clearance structure (21) is a tool withdrawal groove, the groove bottom surface of the tool withdrawal groove is arranged in an inclined manner relative to the axial end surface of the cylinder (10), and the inclined groove bottom surface extends in the direction close to the center of the cylinder (10) and extends into the cylinder; the sliding vane groove (11) is communicated with the tool withdrawal groove through the groove bottom hole (22), when the sliding vane groove (11) is machined, one end of a machining tool is first inserted into the groove bottom hole (22), and with the increase of the machining depth, the machining tool is inserted into the tool withdrawal groove from the groove bottom hole (22).

2. The air cylinder of claim 1, wherein The application relates to a cylinder (10) having a sliding vane groove (11); a thickened portion (20) is arranged at the outer periphery of the cylinder (10) on the side having the sliding vane groove (11), and the sliding vane groove (11) extends into the thickened portion (20); the thickened portion (20) is further provided with a clearance structure (21) for avoiding a grinding wheel on the axial end surface of the cylinder, and the clearance structure (21) is communicated with the tail of the sliding vane groove (11); the thickened portion (20) has a connecting area (23) between the groove bottom hole (22) of the cylinder (10) and the outer peripheral surface of the thickened portion (20), the radial thickness of the connecting area (23) is H1, the cylinder (10) further has a spring hole (24) extending in the radial direction and communicating the groove bottom hole (22) with the outer peripheral surface of the thickened portion (20), and at least a part of the spring hole (24) is located in the connecting area (23); both axial end surfaces of the cylinder (10) have a tool withdrawal groove as the clearance structure, and the distance between the groove bottoms of the two tool withdrawal grooves is half of the difference between the diameter of the spring hole (24) and H2, and H1 and H2 satisfy the condition H1>=H2; the clearance structure (21) is a tool withdrawal groove, the groove bottom surface of the tool withdrawal groove is arranged in an inclined manner relative to the axial end surface of the cylinder (10), and the inclined groove bottom surface extends in the direction close to the center of the cylinder (10) and extends into the cylinder; the sliding vane groove (11) is communicated with the tool withdrawal groove through the groove bottom hole (22), when the sliding vane groove (11) is machined, one end of a machining tool is first inserted into the groove bottom hole (22), and with the increase of the machining depth, the machining tool is inserted into the tool withdrawal groove from the groove bottom hole (22).

3. The air cylinder of claim 1, wherein The application relates to a cylinder (10) having a sliding vane groove (11); a thickened portion (20) is arranged at the outer periphery of the cylinder (10) on the side having the sliding vane groove (11), and the sliding vane groove (11) extends into the thickened portion (20); the thickened portion (20) is further provided with a clearance structure (21) for avoiding a grinding wheel on the axial end surface of the cylinder, and the clearance structure (21) is communicated with the tail of the sliding vane groove (11); the thickened portion (20) has a connecting area (23) between the groove bottom hole (22) of the cylinder (10) and the outer peripheral surface of the thickened portion (20), the radial thickness of the connecting area (23) is H1, the cylinder (10) further has a spring hole (24) extending in the radial direction and communicating the groove bottom hole (22) with the outer peripheral surface of the thickened portion (20), and at least a part of the spring hole (24) is located in the connecting area (23); both axial end surfaces of the cylinder (10) have a tool withdrawal groove as the clearance structure, and the distance between the groove bottoms of the two tool withdrawal grooves is half of the difference between the diameter of the spring hole (24) and H2, and H1 and H2 satisfy the condition H1>=H2; the clearance structure (21) is a tool withdrawal groove, the groove bottom surface of the tool withdrawal groove is arranged in an inclined manner relative to the axial end surface of the cylinder (10), and the inclined groove bottom surface extends in the direction close to the center of the cylinder (10) and extends into the cylinder; the sliding vane groove (11) is communicated with the tool withdrawal groove through the groove bottom hole (22), when the sliding vane groove (11) is machined, one end of a machining tool is first inserted into the groove bottom hole (22), and with the increase of the machining depth, the machining tool is inserted into the tool withdrawal groove from the groove bottom hole (22).

4. The air cylinder of claim 1, wherein ​ 5. The air cylinder of any one of claims 1 to 4, wherein, ​ 6. A pump body assembly characterized by, ​ ​ ​ 7. The pump body assembly of claim 6, wherein, ​ 8. The pump body assembly of claim 7, wherein, ​ 9. A compressor characterized by, ​ 10. An air conditioner characterized by comprising: ​

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