Compression cylinder, compressor and refrigeration equipment

Abstract

The utility model discloses a compression air cylinder, a compressor and refrigeration equipment, and relates to the technical field of compressors, the compression air cylinder comprises an air cylinder, a rolling piston and a slip sheet, and the air cylinder is provided with a working cavity and a slip sheet groove which are communicated with each other; the rolling piston is arranged in the working cavity, a mounting hole is formed in the middle of the rolling piston in the axial direction in a penetrating mode, the mounting hole is used for being movably arranged on an eccentric part of a compressor crankshaft in a sleeving mode so as to be driven by the crankshaft to eccentrically roll in the working cavity, and a mounting groove is formed in the outer side face of the rolling piston. The mounting groove is gradually expanded outwards; the slip sheet comprises a main body and a connecting part, the main body is slidably arranged in the slip sheet groove, the connecting part is arranged at one end of the main body, and at least part of the connecting part is located in the mounting groove; according to the technical scheme, the air tightness of an existing compression air cylinder is improved, and meanwhile the stability of the compression air cylinder is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of compressors, in particular to a compression cylinder, a compressor and a refrigeration device. Background Art

[0002] Existing rotary compressors are equipped with a cylinder, a crankshaft with an eccentric portion, a piston mounted on the eccentric portion of the crankshaft, and a vane elastically contacting the piston. As the crankshaft rotates, the eccentric portion rotates synchronously with the crankshaft, thereby driving the piston to perform eccentric movement within the cylinder. At this time, the vane elastically contacts the outer circumference of the piston, creating a linear contact between the two. When compressing gas, as the pressure differential across the vane increases, leakage increases at the contact point between the vane's front end and the piston's outer circumference, reducing compressor capacity and increasing power consumption.

[0003] In order to solve the above problems, the utility model developers first thought of setting a hinge groove on the outer peripheral side of the piston. By hingedly connecting the front end of the slide in the hinge groove, the existing line contact scheme is changed to a surface contact scheme, which greatly improves the sealing of the contact part between the front end of the slide and the outer peripheral side of the piston, and improves the problem of gas leakage. However, the cross-sectional area of ​​the current hinge groove is set to first increase and then decrease, and two stop protrusions will be formed at the groove mouth. The strength of the two stop protrusions is weak and prone to damage, which makes the overall stability of the cylinder poor. Utility Model Content

[0004] The main purpose of the utility model is to provide a compression cylinder, a compressor and a refrigeration device, aiming to improve the air tightness of the existing compression cylinder and enhance its stability.

[0005] To achieve the above-mentioned purpose, the present invention provides a compression cylinder comprising:

[0006] A cylinder, wherein the cylinder is formed with a working chamber and a sliding vane groove that are connected;

[0007] A rolling piston is disposed in the working chamber, a mounting hole is formed in the middle of the rolling piston along its axial direction, the mounting hole is used to be movably mounted on the eccentric portion of the compressor crankshaft so as to be driven by the crankshaft to eccentrically roll in the working chamber, a mounting groove is formed on the outer side surface of the rolling piston, and the mounting groove is gradually expanded outward; and

[0008] The slide comprises a main body and a connecting portion, wherein the main body can be slidably arranged in the slide slot, and the connecting portion is arranged at one end of the main body and is at least partially located in the installation slot.

[0009] In one embodiment, the groove wall of the installation groove is arranged in a curved surface, and the outer surface of the connecting portion is arranged in a curved surface adapted to the groove wall of the installation groove.

[0010] In one embodiment, the mounting groove is an arc groove; and / or,

[0011] The outer surface of the connecting portion is arranged in an arc shape.

[0012] In one embodiment, one end of the main body connected to the connecting portion is flush with the side surface of the connecting portion; or

[0013] A side surface of one end of the main body connected to the connecting portion protrudes from a side surface of the connecting portion.

[0014] In one embodiment, the radius of the circle corresponding to the arc groove is greater than the radius of the circle corresponding to the arc surface of the connecting portion.

[0015] In one embodiment, the depth of the mounting groove is greater than 1 mm.

[0016] In one embodiment, a limiting structure is provided between the connecting portion and the mounting groove;

[0017] The limiting structure includes a limiting protrusion and a limiting groove extending radially along the mounting groove, one of the limiting protrusion and the limiting groove is provided on the connecting portion, and the other is provided on the mounting groove, so as to limit the connecting portion in the axial direction of the mounting groove.

[0018] In one embodiment, a rotation protrusion is provided at one end of the limiting protrusion along the axial direction of the installation groove, and a rotation hole is formed in the limiting groove corresponding to the rotation protrusion.

[0019] In one embodiment, the rolling piston is further provided with an oil hole communicating with the mounting hole and the mounting groove.

[0020] The present invention also provides a compressor, comprising any one of the compression cylinders described above.

[0021] In one embodiment, the compressor comprises a carbon dioxide compressor.

[0022] The present invention also provides a refrigeration device, comprising any one of the compressors described above.

[0023] The technical solution of the present invention is to provide a mounting groove on the outer side surface of the rolling piston, and the connecting portion is at least partially located in the mounting groove, thereby changing the existing line contact between the rolling piston and the sliding plate into surface contact, thereby improving the air tightness between the sliding plate and the rolling piston. Moreover, the mounting groove is arranged to gradually expand outward, so that the cross-section of the mounting groove gradually increases from the bottom of the groove to the groove mouth, and there is no stop protrusion, and there is no position with weak strength and poor stability, thereby improving the stability of the connection between the rolling piston and the sliding plate, improving the air tightness of the existing compression cylinder while improving its stability. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0025] Figure 1 This is a structural diagram of an embodiment of a conventional compression cylinder of the present invention;

[0026] Figure 2 This is a structural diagram of an embodiment of the improved scheme for the compression cylinder first thought of by the utility model personnel;

[0027] Figure 3 A schematic structural diagram of an embodiment of a compression cylinder provided by the present utility model;

[0028] Figure 4 for Figure 3 A top view of the rolling cylinder in FIG;

[0029] Figure 5 A schematic structural diagram of an embodiment of a rolling cylinder provided by the present utility model;

[0030] Figure 6 A schematic structural diagram of another embodiment of the rolling cylinder provided by the present utility model;

[0031] Figure 7 A structural schematic diagram of another embodiment of the rolling cylinder provided by the present utility model;

[0032] Figure 8 A schematic structural diagram of an embodiment of a slide provided by the present invention;

[0033] Figure 9 This is a structural schematic diagram of another embodiment of the sliding plate provided by the utility model.

[0034] Description of Figure Numbers:

[0035] 100. Compression cylinder; 1. Cylinder; 11. Working chamber; 12. Slide vane groove; 13. Compression chamber; 2. Rolling piston; 21. Mounting groove; 22. Mounting hole; 3. Slide vane; 31. Main body; 32. Connecting portion; 321. Side of connecting portion; 41. Limiting protrusion; 42. Rotating protrusion; 5. Oil hole;

[0036] 1', cylinder; 2', piston; 3', slide; 4', stop protrusion.

[0037] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0038] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts shall fall within the scope of protection of the present invention.

[0039] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel schemes. Taking "A and / or B" as an example, it includes scheme A, or scheme B, or a scheme in which A and B are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0041] See also Figure 1In the existing rotary compressor, there is provided a cylinder 1', a crankshaft with an eccentric structure, a piston 2' mounted on the eccentric part of the crankshaft, and a vane 3' elastically abutting against the piston 2'. Under the rotation of the crankshaft, the eccentric part rotates synchronously with the crankshaft, thereby driving the piston 2' to perform eccentric movement in the cylinder 1'. At this time, the vane 3' elastically abuts against the outer peripheral side of the piston 2', and there is line contact between the two. When compressing gas, as the pressure difference on both sides of the vane 3' increases, the leakage of the contact part between the front end of the vane 3' and the outer peripheral side of the piston 2' increases, resulting in reduced compressor capacity and increased power consumption.

[0042] See also Figure 2 In order to solve the above problems, the utility model developers first thought of setting a hinge groove on the outer peripheral side of the piston 2'. By hingedly connecting the front end of the slide 3' in the hinge groove, the existing line contact scheme is changed to a surface contact scheme, which greatly improves the sealing performance of the contact part between the front end of the slide 3' and the outer peripheral side of the piston 2', and improves the problem of gas leakage. However, the cross-sectional area of ​​the current hinge groove is first increased and then decreased, and two stop protrusions 4' will be formed at the groove. The strength of the two stop protrusions 4' is weak and easily damaged, which makes the overall stability of the compression cylinder poor.

[0043] The present invention provides a compression cylinder 100. Figures 3 to 7 In one embodiment of the present utility model, the compression cylinder 100 includes a cylinder 1, a rolling piston 2 and a vane 3. The cylinder 1 is formed with a connected working chamber 11 and a vane groove 12; the rolling piston 2 is arranged in the working chamber 11, and a mounting hole 22 is penetrated in the middle part of the rolling piston 2 along its axial direction. The mounting hole 22 is used to be movably mounted on the eccentric part of the compressor crankshaft so as to be driven by the crankshaft to roll eccentrically in the working chamber 11. The outer side surface of the rolling piston 2 is provided with a mounting groove 21, and the mounting groove 21 is gradually expanded outward; the vane 3 includes a main body 31 and a connecting portion 32. The main body 31 can be slidably arranged in the vane groove 12. The connecting portion 32 is arranged at one end of the main body 31 and is at least partially located in the mounting groove 21.

[0044] The technical solution of the present invention is to provide a mounting groove 21 on the outer side surface of the rolling piston 2, and the connecting portion 32 is at least partially located in the mounting groove 21, thereby changing the existing line contact between the rolling piston 2 and the slide 3 into a surface contact, thereby improving the air tightness between the slide 3 and the rolling piston 2. Moreover, the mounting groove 21 is arranged to gradually expand outward, so that the cross-section of the mounting groove 21 gradually increases from the bottom of the groove to the groove mouth, and there is no stop protrusion, and there is no position with weak strength and poor stability, thereby improving the stability of the connection between the rolling piston 2 and the slide 3, improving the air tightness of the existing compression cylinder 100 while improving its stability.

[0045] Furthermore, it should be emphasized that the cross-sectional area of ​​the current hinge grooves is first increased and then decreased. With this arrangement, the maximum dimension of the front end of the slide 3 is larger than the dimension of the notch of the hinge groove. Therefore, in the actual production process, either the slide 3 and the cylinder 1 are processed and produced together, or the hinge groove is set as a through groove, and then the slide 3 is assembled from the axial direction of the cylinder 1. The production and manufacturing is difficult. In the later stage, if the slide 3 is damaged, since the two are inseparable, the slide 3 and the cylinder 1 also need to be replaced together, which makes the production and manufacturing cost of the slide 3 and the cylinder 1 high, the assembly is difficult, and they cannot be replaced and repaired separately.

[0046] In the technical solution of the present application, since the mounting groove 21 is set to gradually expand outward, the cross-sectional area is the largest at the notch of the mounting groove 21. During the actual assembly process, the mounting groove 21 does not necessarily need to be set as a through groove in the axial direction of the cylinder 1. The slide 3 can be assembled directly from the notch, and the two can be manufactured separately, reducing the production and manufacturing costs and assembly difficulty of the slide 3 and the cylinder 1. In addition, the slide 3 and the rolling piston 2 are detachable and can be replaced and repaired separately.

[0047] It should be noted that in the technical solution of this embodiment, the specific shape of the installation groove 21 is not limited. It can be a curved groove, an inclined groove, or a groove wall with a portion being an inclined surface and another portion being a curved surface, etc., which is not limited here.

[0048] The mounting hole 22 is used to be movably mounted on the eccentric part of the compressor crankshaft. The eccentric part rotates itself when the compressor crankshaft rotates. Specifically, the end of the eccentric part is movably abutted against the mounting hole 22. When the eccentric part rotates, the rolling piston 2 changes from the existing rotational movement mode to left and right swinging and translational movement mode. During the movement, the connecting portion 32 of the slide 3 is always located in the mounting groove 21, which can increase the sealing width between the connecting portion 32 of the slide 3 and the rolling piston 2, effectively improve the sealing effect, reduce leakage during the compression process, and improve the energy efficiency of the compressor.

[0049] It can be understood that during the operation of the compression cylinder 100, the rolling piston 2 swings relative to the slide 3. If the mounting groove 21 is set as an oblique groove, the connecting portion 32 of the slide 3 can be set as a rectangle or a trapezoid. At this time, the connecting portion 32 of the slide 3 is likely to interfere with the movement of the rolling piston 2 to a certain extent, hindering its movement. If the mounting groove 21 is set as an oblique groove and the outer surface of the connecting portion 32 of the slide 3 is set as a curved surface, the gap between the connecting portion 32 of the slide 3 and the mounting groove 21 will be relatively large. This part will become the invalid volume in the compressor, affecting the volumetric efficiency of the compressor. Therefore, in order to improve the stability of the movement of the rolling piston 2 and prevent the slide 3 from interfering with the rolling piston 2 during the movement of the rolling piston 2,

[0050] In a further embodiment, the groove wall of the mounting groove 21 is set as a curved surface, and the outer surface of the connecting portion 32 is set as a curved surface that is compatible with the groove wall of the mounting groove 21. In this way, the groove wall of the mounting groove 21 and the outer surface of the connecting portion 32 are both set as curved surfaces, which can improve the stability of the rolling piston 2 during the movement. Moreover, due to the curved surface setting, the gap between the connecting portion 32 of the slide 3 and the mounting groove 21 can be set to be relatively small, thereby reducing the invalid volume in the compressor and improving the volumetric efficiency of the compressor.

[0051] Furthermore, when the mounting groove 21 is a curved groove, it can be composed of multiple curved surfaces with different curvatures. For example, the radii of the circles corresponding to the multiple curved surfaces are not equal, or all the curved surfaces can be set with the same curvature. For example, the mounting groove 21 is set as an arc groove, etc., which is not limited here.

[0052] It can be understood that when the groove wall of the mounting groove 21 is spliced ​​by multiple curved surfaces with different curvatures, on the one hand, it is easy to leave a gap between the groove wall of the mounting groove 21 and the outer surface of the connecting portion 32 of the slide 3, affecting the volumetric efficiency of the compressor. On the other hand, when the connecting portion 32 of the slide 3 moves from abutting against one of the curved surfaces to abutting against another curved surface, its movement is prone to jerks due to the change in the curvature of the curved surface, resulting in poor smoothness of the movement. Therefore, in a further embodiment, the mounting groove 21 is an arc groove; and / or the outer surface of the connecting portion 32 is set as an arc surface. In the technical solution of this embodiment, the mounting groove 21 is an arc groove, so that the curvature corresponding to each part of the groove wall of the mounting groove 21 is the same, and the corresponding circle radius is also the same. There is no connection between curved surfaces with different curvatures, so that no jerks will occur, which improves the smoothness of the relative movement between the slide 3 and the rolling piston 2.

[0053] It should be emphasized that since the mounting groove 21 is arranged to gradually expand outward, when the mounting groove 21 is an arc groove, the central angle corresponding to the arc groove must be less than 180°, so that the cross-sectional area of ​​the mounting groove 21 will not have any smaller part, thereby improving its stability.

[0054] In a further embodiment, the central angle corresponding to the arc groove is 180°. At this time, the cross-sectional area at the notch of the mounting groove 21 is the largest, and the groove width is also the largest, leaving more space for relative movement between the rolling piston 2 and the slide 3, thereby increasing the range of movement of the rolling piston 2 relative to the slide 3 and improving the stability of the movement of the rolling piston 2.

[0055] Moreover, in the hinge scheme, the maximum width of the portion of the slide 3 located in the hinge groove will be greater than the width at the notch of the hinge groove, and at the notch of the hinge groove, the width of the slide 3 will be less than the width at the notch of the hinge groove, so that the maximum width of the connecting portion 32 of the slide 3 will be greater than the maximum width of the main body 31 of the slide 3. At this time, the side of the connecting portion 32 of the slide 3 will protrude from the main body 31, making it difficult to process the planes on both sides of the main body 31, and the precision of the plane processing on both sides of the main body 31 is low.

[0056] Therefore, in further embodiments, see Figure 8 The end where the main body 31 is connected to the connecting part 32 is flush with the side surface 321 of the connecting part. At this time, the joint between the main body 31 and the connecting part 32 is the smoothest and has good rotation stability. During the production and processing process, the connecting part can be processed first. After the processing of the connecting part is completed, the side surface 321 of the connecting part will not protrude from the main body 31, so that when the main body 31 is processed, it will not hinder the processing of the main body 31.

[0057] Alternatively, see Figure 9 The side surface of one end of the main body 31 connected to the connecting portion 32 protrudes from the side surface 321 of the connecting portion. In the solution of this embodiment, the end of the main body 31 connected to the connecting portion 32 protrudes flatly from the side surface of the connecting portion 321, so that the side surface of the connecting portion 32 does not protrude from the main body 31, thereby reducing the difficulty of plane processing on both sides of the main body 31 and improving the plane processing accuracy of both sides of the main body 31.

[0058] Specifically, the side surface 321 of the connecting portion refers to Figure 8 Hehe Figure 9 The side surfaces of the upper and lower sides of the connecting portion 32 in the embodiment of the present invention are referred to as the side surfaces of the upper and lower sides of the connecting portion 32, and the side surfaces of the end where the main body 31 is connected to the connecting portion 32 refer to the side surfaces of the upper and lower sides of the connecting portion 32. Figure 8 and Figure 9 The upper and lower side surfaces adjacent to the connecting portion 32.

[0059] Furthermore, since a small relative movement occurs between the rolling piston 2 and the slide 3 during the operation of the compression cylinder 100, a certain gap should be maintained between the connecting portion 32 and the mounting groove 21 to ensure smoothness of the movement. Otherwise, the connecting portion 32 will cause greater interference with the movement of the rolling piston 2, resulting in poor smoothness of the movement.

[0060] Therefore, in a further embodiment, the radius of the circle corresponding to the arc groove is larger than the radius of the circle corresponding to the arc surface of the connecting portion 32, so that the volume of the arc groove can be larger than the volume of the portion of the connecting portion 32 located inside the arc groove, leaving a certain gap between the two, allowing the rolling piston 2 to swing and translate slightly under the movement of the eccentric portion.

[0061] In the technical solution of the present application, as the crankshaft rotates, the eccentric part arranged on the crankshaft will rotate synchronously with the crankshaft, and during the rotation of the eccentric part, the end of the eccentric part will abut different positions of the rolling piston 2 with different positions of the working chamber 11 of the cylinder 1. In the process of compressing the gas, the distance between the abutting position and the slide groove 12 will become smaller and smaller. At the same time, the volume of the compression chamber 13 defined by the slide 3, the rolling piston 2 and the cylinder 1 will also become smaller and smaller, thereby realizing the compression of the gas.

[0062] In addition, since there is no stop protrusion in the technical solution of the present application, and the rolling piston 2 and the slide 3 are detachably arranged, at this time, if the depth of the mounting groove 21 is too shallow, during the operation of the compression cylinder 100, the rolling piston 2 is driven by the crankshaft to roll eccentrically in the working chamber 11, and the connecting portion 32 of the slide 3 is easy to detach from the mounting groove 21, thereby reducing the air tightness of the connection between the rolling piston 2 and the connecting portion 32 of the slide 3.

[0063] Therefore, in a further embodiment, the depth of the mounting groove 21 is greater than 1 mm. After multiple experiments, it has been proved that when the depth of the mounting groove 21 is greater than 1 mm, during the operation of the compression cylinder 100, the connecting portion 32 of the slide 3 will not detach from the mounting groove 21, thereby ensuring the airtightness of the connection between the rolling piston 2 and the connecting portion 32 of the slide 3.

[0064] Compared with the existing hinge groove solution, there is no need to set a limit protrusion 41 to prevent the slide 3 from separating from the installation groove 21, so there is no stop protrusion, and there is no position with weak strength and poor stability, which improves the stability of the connection between the rolling piston 2 and the slide 3, improving the air tightness of the existing compression cylinder 100 while improving its stability.

[0065] In addition, the compression cylinder 100 further includes an elastic member disposed in the slide groove 12 , and the elastic member abuts against the slide 3 to elastically press the slide 3 into the installation groove 21 .

[0066] In addition, since the portion of the slide 3 extending out of the slide slot 12 is a cantilever structure, it is easy to wobble in the axial direction of the rolling piston 2. In the existing schemes in which the slide 3 directly abuts the piston and the hinged slot scheme, in order to be able to install the slide 3, no axial limiting structure can be provided, thereby making it impossible to effectively solve the axial wobble of the slide 3. In the present application, since the mounting slot 21 is gradually expanded outward, the slide 3 can be installed directly from the notch of the mounting slot 21. At this time, the mounting slot 21 does not need to pass through the piston in the axial direction. Therefore, in order to limit the slide 3 in the axial direction of the rolling piston 2, a limiting structure is provided between the connecting portion 32 and the mounting slot 21.

[0067] The limiting structure includes a limiting protrusion 41 and a limiting groove extending radially along the mounting groove 21, wherein one of the limiting protrusion 41 and the limiting groove is provided on the connecting portion 32 and the other is provided on the mounting groove 21, so as to limit the connecting portion 32 in the axial direction of the mounting groove 21.

[0068] In the technical solution of this embodiment, since the slide 3 can be installed directly from the notch of the mounting groove 21, the mounting groove 21 does not have to pass through the rolling piston 2 in the axial direction, so that a limiting structure can be set between the connecting portion 32 and the mounting groove 21, and the limiting protrusion 41 and the limiting groove are arranged to extend radially along the mounting groove 21. Therefore, during the operation of the compression cylinder 100, the limiting groove and the limiting protrusion 41 can move relative to each other in the radial direction, so that the rolling piston 2 can make eccentric movement against the wall of the working chamber 11. At this time, in the axial direction of the rolling piston 2, the limiting protrusion 41 and the limiting groove can limit the slide 3, thereby preventing the slide 3 from shaking in the axial direction of the rolling piston 2.

[0069] Specifically, one of the limiting protrusion 41 and the limiting groove is provided on the connecting portion 32, and the other is provided on the mounting groove 21. The limiting protrusion 41 may be provided on the connecting portion 32, and the limiting groove may be provided on the mounting groove 21, or the limiting protrusion 41 may be provided on the mounting groove 21, and the limiting groove may be provided on the connecting portion 32, which is not limited here. The limiting protrusion 41 and the limiting groove may be provided in only one group, or in multiple groups, which is not limited here.

[0070] In the meantime, see Figure 7 The limiting protrusion 41 can be arranged in a plane in the axial direction of the mounting groove 21, or it can be provided with a rotating protrusion 42. When it is arranged in a plane, the slide 3 will have a certain possibility of detaching from the mounting groove 21. Therefore, in order to further prevent the slide 3 from detaching from the mounting groove 21, the limiting protrusion 41 is provided with a rotating protrusion 42 at one end in the axial direction of the mounting groove 21, and the limiting groove is provided with a rotating hole corresponding to the rotating protrusion 42. In the technical solution of this embodiment, by providing the rotating protrusion 42, the slide 3 can be limited in the radial direction of the rolling piston 2, thereby preventing the slide 3 from detaching from the mounting groove 21.

[0071] Taking the limiting protrusion 41 provided on the mounting groove 21 and the limiting groove opened on the slide 3 as an example, when the connecting portion 32 of the slide 3 is assembled into the mounting groove 21, the limiting groove clamps the limiting protrusion 41 along the axial direction of the mounting groove 21, thereby limiting the connecting portion 32 in the axial direction of the mounting groove 21. At the same time, the rotating hole can be rotatably sleeved on the rotating protrusion 42, so that under the movement of the eccentric portion, the rolling piston 2 is interfered with by the slide 3, and in the working chamber 11, it takes the rotating protrusion 42 as the rotating point and swings slightly compared to the slide 3. Moreover, the sliding vane 3 is driven to move inside and outside the slide groove 12 by the rotating protrusion 42, thereby changing the position where the rolling piston 2 abuts against the cavity wall of the working chamber 11, thereby compressing the gas.

[0072] In addition, in the technical solution of the present application, since the mounting hole 22 is used to be movably mounted on the eccentric part of the compressor crankshaft, in actual operation, there is lubricating oil in the mounting hole 22, thereby lubricating the movement between the rolling piston 2 and the eccentric part, and relative movement will also occur between the connecting part 32 and the mounting groove 21. At this time, if lubricating oil is filled in the mounting groove 21, it can also lubricate the relative movement of the two and improve the smoothness during the movement.

[0073] Therefore, the rolling piston 2 is also provided with an oil hole 5 connecting the mounting hole 22 and the mounting groove 21, so that the lubricating oil in the mounting hole 22 can be diverted into the mounting groove 21 through the oil hole 5, thereby lubricating the relative movement between the connecting portion 32 and the mounting groove 21, thereby improving the smoothness of the movement process.

[0074] The present invention also proposes a compressor, which includes a shell and a compression cylinder 100 arranged in the shell. The specific structure of the compression cylinder 100 refers to the above embodiment. Since this compressor adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0075] Specifically, in this embodiment, the compressor comprises a carbon dioxide compressor. A carbon dioxide compressor is a special compressor that uses carbon dioxide as a working medium. It is typically used in a refrigeration system known as a "carbon dioxide transcritical cycle." It has no ozone-depleting effect. In certain application scenarios, carbon dioxide systems can achieve higher energy efficiency than traditional refrigeration systems, operate over a wider temperature range, and are suitable for various refrigeration and air-conditioning applications.

[0076] The present invention also proposes a refrigeration device, which includes an air conditioner, a refrigerator, etc. The refrigeration device includes a compressor and a heat exchanger. The specific structure of the compressor refers to the above embodiment. Since the present refrigeration device adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0077] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the technical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A compression cylinder, characterized in that: include: A cylinder, wherein the cylinder is formed with a working chamber and a sliding vane groove that are connected; A rolling piston is disposed in the working chamber, a mounting hole is formed in the middle of the rolling piston along its axial direction, the mounting hole is used to be movably mounted on the eccentric portion of the compressor crankshaft so as to be driven by the crankshaft to eccentrically roll in the working chamber, a mounting groove is formed on the outer side surface of the rolling piston, and the mounting groove is gradually expanded outward; and The slide comprises a main body and a connecting portion, wherein the main body can be slidably arranged in the slide slot, and the connecting portion is arranged at one end of the main body and is at least partially located in the installation slot.

2. The compressed air cylinder according to claim 1, wherein: The mounting groove is an arc groove; and / or, The outer surface of the connecting portion is arranged in an arc shape.

3. The compressed air cylinder according to claim 2, wherein: One end of the main body connected to the connecting portion is flush with the side surface of the connecting portion; or, The side surface of one end of the main body connected to the connecting portion is protruded from the side surface of the connecting portion.

4. The compressed air cylinder according to claim 2, wherein: The radius of the circle corresponding to the arc groove is greater than the radius of the circle corresponding to the arc surface of the connecting portion.

5. The compressed air cylinder according to claim 1, wherein: The groove wall of the installation groove is arranged in a curved surface, and the outer surface of the connecting portion is arranged in a curved surface adapted to the groove wall of the installation groove.

6. The compressed air cylinder according to claim 5, characterized in that The mounting groove is an arc groove; and / or, The outer surface of the connecting portion is arranged in an arc shape.

7. The compressed air cylinder according to claim 6, characterized in that One end of the main body connected to the connecting portion is flush with the side surface of the connecting portion; or, The side surface of one end of the main body connected to the connecting portion is protruded from the side surface of the connecting portion.

8. The compressed air cylinder according to claim 6, wherein: The radius of the circle corresponding to the arc groove is greater than the radius of the circle corresponding to the arc surface of the connecting portion.

9. The compressed air cylinder according to claim 5, wherein: The depth of the mounting groove is greater than 1 mm.

10. The compressed air cylinder according to any one of claims 1 to 9, characterized in that: A limiting structure is provided between the connecting portion and the mounting groove; The limiting structure includes a limiting protrusion and a limiting groove extending along the radial direction of the rolling piston, one of the limiting protrusion and the limiting groove is provided on the connecting portion, and the other is provided on the mounting groove, so as to limit the connecting portion in the axial direction of the mounting groove.

11. The compressed air cylinder according to claim 10, wherein: A rotation protrusion is provided at one end of the limiting protrusion along the axial direction of the rolling piston, and a rotation hole is formed in the limiting groove corresponding to the rotation protrusion.

12. The compressed air cylinder according to claim 1, wherein: The rolling piston is further provided with an oil hole communicating with the mounting hole and the mounting groove.

13. A compressor, characterized in that: Comprising a compression cylinder according to any one of claims 1 to 12.

14. The compressor according to claim 13, wherein The compressor comprises a carbon dioxide compressor.

15. A refrigeration device, characterized in that: Comprising a compressor as claimed in claim 13 or 14.

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