Compression cylinder, compressor and refrigeration equipment
By designing the arc groove matching structure of the rolling piston and slide in the compressor, the efficiency reduction problem of slide compressor due to linear contact and reliance on spring force is solved, and more efficient gas suction, compression and discharge are achieved, improving the overall performance of the compressor.
Patent Information
- Application Number
- CN202422085539.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-26
- Publication Date
- 2025-06-27
- Estimated Expiration
- 2034-08-26
AI Technical Summary
The existing slide compressors have linear contact between the slide and the piston and rely on spring force, resulting in a decrease in the effective suction volume and reduced operating efficiency in the case of temperature difference or relative inclination.
A compression cylinder is designed, adopting a rolling piston and slider structure. The outer peripheral wall of the rolling piston is equipped with an arc groove. The connecting end of the slider is cooperated with the arc groove to ensure that the rolling piston can swing around the connecting end of the slider. The slider moves freely in the radial direction, forming a changing compression chamber to reduce air leakage.
By cooperating with the arc groove of the rolling piston, air leakage from the exhaust side to the suction side is reduced, the operation efficiency of the compressor is improved, and the suction amount and overall performance of the compressor are enhanced.
Smart Images
Figure CN223035255U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of compressors, and particularly relates to a compression cylinder, a compressor and a refrigeration device. Background Art
[0002] Rotary compressors are widely used due to their high efficiency, compact structure, small size and light weight, for example, inside household air conditioners.
[0003] In the existing sliding vane type rotary compressor, the cylinder needs the sliding vane to complete close contact with the cylinder under the action of a spring. When the sliding vane or the piston is relatively inclined, or due to the temperature difference between the suction and discharge sides, the thermal deformation of the contact position between the sliding vane and the piston is different, resulting in the connection between the suction and discharge sides of the compressor, and the effective suction volume of the compressor decreases, and the capacity decreases. Summary of the Utility Model
[0004] The main purpose of the utility model is to propose a compression cylinder, a compressor and a refrigeration device, aiming to solve the problems of the decrease in the effective suction volume and the decrease in the operating efficiency of the existing sliding vane type compressor.
[0005] To achieve the above object, the compression cylinder proposed by the utility model includes:
[0006] A cylinder having a working chamber and a chute communicating with the working chamber, the chute extending along the radial direction of the cylinder;
[0007] A rolling piston for being driven by a crankshaft to swing eccentrically in the working chamber, and an arc groove is recessed on the outer peripheral wall of the rolling piston; and,
[0008] A sliding vane slidably mounted in the chute along the radial direction of the cylinder, the sliding vane having a thickness direction extending along the circumferential direction of the rolling piston, and the sliding vane having a connecting end close to the rolling piston and cooperating with the arc groove, so that the rolling piston can swing around the connecting end of the sliding vane;
[0009] Wherein, the radius of the arc groove is r, the minimum width of the arc groove at the groove opening is t, the thickness of the connecting end of the sliding vane corresponding to the minimum width of the arc groove at the groove opening is s, the eccentricity of the rolling piston is e, and the distance between the center of the arc groove and the center of the rolling piston is L.
[0010] In an embodiment, the arc groove is arranged as an arc groove;
[0011] The thickness of the connecting end of the sliding vane corresponding to the minimum width of the arc groove at the groove opening is arranged to be narrowed, so as to form a fitting convex portion adapted to the arc groove at the end of the connecting end of the sliding vane.
[0012] In one embodiment, s < r.
[0013] In one embodiment, t < r.
[0014] In one embodiment, the central angle of the arc groove is set to be greater than 180°. Correspondingly, the cross-section of the mating convex part is arc-shaped, and the central angle of the arc is set to be greater than 180°.
[0015] In one embodiment, the distance between the center of the arc groove and the center of the rolling piston is L, the radius of the arc groove is r, the radius of the rolling piston is R, and L + r < R.
[0016] In one embodiment, the thickness of the sliding vane at the sliding fit with the sliding groove is d, the radius of the arc groove is r, and d > 2r.
[0017] In one embodiment, on two sides of the connecting end of the sliding vane in the thickness direction, arc-shaped concave surfaces are formed at the notch of the corresponding arc groove; and / or,
[0018] A chamfer is provided at the periphery of the notch of the arc groove.
[0019] The present utility model further provides a compressor, and the compressor includes a compression cylinder, and the compression cylinder includes:
[0020] A cylinder having a working chamber and a sliding groove communicating with the working chamber, and the sliding groove extends along the radial direction of the cylinder;
[0021] A rolling piston for being driven by a crankshaft to swing eccentrically in the working chamber, and an arc groove is recessed on the outer peripheral wall of the rolling piston; and,
[0022] A sliding vane is slidably mounted in the sliding groove along the radial direction of the cylinder. The sliding vane has a thickness direction extending along the circumference of the rolling piston. The sliding vane has a connecting end close to the rolling piston and mating with the arc groove, so that the rolling piston can swing around the connecting end of the sliding vane;
[0023] Wherein, the radius of the arc groove is r, the minimum width of the arc groove at the notch is t, the thickness of the connecting end of the sliding vane corresponding to the minimum width at the notch of the arc groove is s, the eccentricity of the rolling piston is e, and the distance between the center of the arc groove and the center of the rolling piston is L,
[0024] In one embodiment, the compressor includes a carbon dioxide compressor.
[0025] The present utility model also provides a refrigeration device, the refrigeration device includes a compressor, the compressor includes a compression cylinder, and the compression cylinder includes:
[0026] A cylinder having a working chamber and a chute communicating with the working chamber, the chute extending along the radial direction of the cylinder;
[0027] A rolling piston for being driven by a crankshaft to eccentrically swing in the working chamber, and an arc groove is recessed on the outer peripheral wall of the rolling piston; and,
[0028] A sliding vane is slidably mounted in the chute along the radial direction of the cylinder, the sliding vane has a thickness direction extending along the circumferential direction of the rolling piston, and the sliding vane has a connecting end close to the rolling piston and mating with the arc groove, so that the rolling piston can swing around the connecting end of the sliding vane;
[0029] Wherein, the radius of the arc groove is r, the minimum width of the arc groove at the groove opening is t, the thickness of the connecting end of the sliding vane corresponding to the minimum width at the groove opening of the arc groove is s, the eccentricity of the rolling piston is e, and the distance between the center of the arc groove and the center of the rolling piston is L.
[0030] In the technical solution of the present utility model, the cylinder includes the working chamber, a rolling piston eccentrically installed in the working chamber, an arc groove is formed on the outer peripheral wall of the rolling piston for accommodating the connecting end of the sliding vane, the sliding vane can move along the radial direction of the cylinder, and the connecting end of the sliding vane matches the arc groove. When the rolling piston eccentrically swings in the working chamber, the cooperation between the connecting end of the sliding vane and the arc groove ensures that the rolling piston can swing around the connecting end of the sliding vane, and at the same time the sliding vane can freely move in the radial direction, thereby forming a variable compression chamber to realize the suction, compression and discharge of gas. The arc groove and the connecting end of the sliding vane are always in surface contact, reducing the possibility of air leakage from the exhaust side to the suction side, greatly improving the operating efficiency of the compressor. The range of the free cooperation degree between the sliding vane and the rolling piston is set to be greater than the range of the eccentric swing angle of the rolling piston to ensure that there is no interference between the sliding vane and the rolling piston, forming a good cooperation, reducing friction and wear, and improving the efficiency and reliability of the compressor. Description of the Drawings
[0031] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.
[0032] Figure 1 and Figure 2 is a schematic structural diagram of an embodiment of a compression cylinder provided by the present invention;
[0033] Figure 3 is Figure 1 a plan view of the rolling piston in
[0034] Figure 4 is Figure 1 a plan view of the sliding vane in
[0035] Figure 5 and Figure 6 is Figure 3 a dimension marking diagram of the rolling piston in
[0036] Figure 7 and Figure 8 is Figure 4 a dimension marking diagram of the sliding vane in
[0037] Figure 9 is Figure 1 a dimension marking diagram of the swing angle of the rolling piston in the cylinder in
[0038] Explanation of the reference numerals in the drawings:
[0039] 100. Compression cylinder; 1. Cylinder; a. Working chamber; b. Slide groove; 2. Rolling piston; c. Arc groove; 3. Sliding vane; 31. Fitting convex part.
[0040] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the accompanying drawings. Specific embodiments
[0041] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts belong to the scope of protection of the present invention.
[0042] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, then such directional indications are only used to explain the relative positional relationship, movement conditions, etc. between components in a certain specific posture. If this specific posture changes, then the directional indications will also change accordingly.
[0043] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, then such descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes the A scenario, or the B scenario, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.
[0044] Rotary compressors are widely used due to their high efficiency, compact structure, small size, and light weight, for example, inside household air conditioners.
[0045] It should be noted that in the prior art, a compressor mainly includes a cylinder, a piston, a sliding vane, and a crankshaft. The piston is located inside the cylinder and is sleeved on the crankshaft along the axial direction of the crankshaft. A spring hole and a sliding groove are provided on the cylinder. A spring is arranged in the spring hole, and the sliding vane is placed in the sliding groove, and the tail end of the sliding vane can compress the spring. When the compression mechanism works, under the action of the spring force at the tail end, the head of the sliding vane always keeps in close contact with the piston, forming a dynamic seal, dividing the inner part of the cylinder into a suction chamber and a compression chamber. Driven by the crankshaft, the processes of suction, compression, and exhaust are completed.
[0046] It can be understood that since the contact between the sliding vane and the piston is a line contact, when the sliding vane or the piston is relatively tilted, or due to the temperature difference between the suction and discharge sides, the thermal deformation at the contact position between the sliding vane and the piston is different, resulting in the communication between the suction and discharge sides of the compressor, causing the effective suction volume of the compressor to decrease and the capacity to decline.
[0047] Since the contact between the sliding vane and the piston depends on the spring force and the pressure difference force, in the working condition with a small operating pressure difference, the sliding vane and the piston are prone to separation, resulting in a sharp decline in capacity. When the piston and the sliding vane come into contact again, due to the different speeds of the sliding vane and the piston, collisions will occur, generating harsh mechanical sounds.
[0048] Since the force on the vane does not increase with the increase of rotational speed, and the vane acceleration required to maintain stable operation of the pump body increases with the increase of frequency, there is an upper limit to the theoretical operating frequency of the rotary compressor.
[0049] In a traditional pump body, the piston may move relative to the vane, and on both sides of the vane are high temperature and high pressure on the exhaust side, and low temperature and low pressure on the suction side. The movement of the piston relative to the vane will cause the high temperature on the exhaust side to transfer to the low temperature, and the low temperature on the suction side will also transfer to the high temperature, resulting in a decrease in the cooling capacity of the compressor and an increase in input. When the oil on the piston moves from the high pressure side to the low pressure side as the piston rotates, the pressure on the surface of the oil changes rapidly from high pressure to low pressure. Since the internal pressure of the liquid does not change in time, the oil will explode from the inside to the outside, forming oil mist, which will be discharged from the pump body with the next exhaust, eventually causing the compressor to discharge more oil.
[0050] The utility model provides a compression cylinder, aiming to solve the problems of reduced effective air intake volume and reduced operating efficiency of the existing vane compressor.
[0051] See also Figure 1 , Figure 5 and Figure 6 In one embodiment of the utility model, the compression cylinder 1100 includes a cylinder 1, a rolling piston 2 and a sliding plate 3, wherein the cylinder 1 has a working chamber a and a sliding groove b connected to the working chamber a, wherein the sliding groove b extends along the radial direction of the cylinder 1; the rolling piston 2 is used to be driven by the crankshaft to eccentrically swing in the working chamber a, and the outer peripheral wall of the rolling piston 2 is concavely provided with an arc groove c; the sliding plate 3 is slidably installed in the sliding groove b along the radial direction of the cylinder 1, and the sliding plate 3 has a radial direction along the rolling piston 2. In the thickness direction extending circumferentially, the slide 3 has a connection end close to the rolling piston 2 and matched with the circular arc groove c, so that the rolling piston 2 can swing around the connection end of the slide 3; wherein the radius of the circular arc groove c is r, the minimum width of the circular arc groove c at the notch is t, the thickness of the connection end of the slide 3 corresponding to the minimum width at the notch of the circular arc groove c is s, the eccentricity of the rolling piston 2 is e, and the distance between the center of the circular arc groove c and the center of the rolling piston 2 is L,
[0052] It should be noted that the cylinder 1 is the main body of the compressor, has a certain shape and size, and is generally set to be cylindrical. The working chamber a is a space inside the cylinder 1, which is used to accommodate the rolling piston 2 and the sliding vane 3 and perform the compression process. The sliding groove b is a groove arranged along the radial direction of the cylinder 1, which is used to install the sliding vane 3 so that the sliding vane 3 can move freely in the radial direction.
[0053] The rolling piston 2 is a component eccentrically installed in the cylinder 1, and its shape is set to be cylindrical, but the central axis does not coincide with the central axis of the cylinder 1. The arc groove c is a groove provided on the outer peripheral wall of the rolling piston 2 for accommodating the connecting end of the sliding vane 3.
[0054] The sliding vane 3 is a component that can move radially along the cylinder 1 and is used to contact the wall of the cylinder 1 to form a compression chamber.
[0055] The thickness direction of the sliding vane 3 refers to the direction along the circumferential direction of the rolling piston 2. The connecting end of the sliding vane 3 is a part of the sliding vane 3 and is used to cooperate with the arc groove c of the rolling piston 2.
[0056] It should be noted that the radius r of the arc groove c, that is, the distance from the center of the arc groove c to the edge of the arc groove c; the notch width t of the arc groove c is the width at the minimum of the notch of the arc groove c. The thickness s of the connecting end of the sliding vane 3 corresponding to the minimum width at the notch of the arc groove c is the thickness of the part where the connecting end of the sliding vane 3 contacts the notch of the arc groove c. The eccentricity e of the rolling piston 2 is the distance between the center of the rolling piston 2 and the central axis of the cylinder 1; the distance L: can also refer to the straight-line distance between the center of the arc groove c and the center of the rolling piston 2.
[0057] It should be noted that please refer to Figure 6 , is half of the central angle corresponding to the minimum width at the notch of the arc groove c, please refer to Figure 8 , is half of the central angle corresponding to the minimum width at the notch of the arc groove c for the sliding vane 3, please refer to Figure 9 , is half of the eccentric swing angle of the rolling piston 2. Express the range of the free fit degree between the sliding vane 3 and the rolling piston 2, Express the range of the eccentric swing angle of the rolling piston 2. When , the rolling piston 2 and the sliding vane 3 are stably fitted and do not interfere.
[0058] In the technical solution of the present utility model, the cylinder 1 includes the working chamber a, an eccentrically installed rolling piston 2 is arranged in the working chamber a, an arc groove c is formed on the outer peripheral wall of the rolling piston 2 for accommodating the connecting end of the sliding vane 3, the sliding vane 3 can move along the radial direction of the cylinder 1, and the connecting end of the sliding vane 3 matches the arc groove c. When the rolling piston 2 swings eccentrically in the working chamber a, the cooperation between the connecting end of the sliding vane 3 and the arc groove c ensures that the rolling piston 2 can swing around the connecting end of the sliding vane 3, and at the same time the sliding vane 3 can move freely in the radial direction, thereby forming a variable compression chamber to realize the suction, compression and discharge of gas. The arc groove c and the connecting end of the sliding vane 3 are always in surface contact, reducing the possibility of air leakage from the exhaust side to the suction side, greatly improving the operating efficiency of the compressor. The range of the free fit degree between the sliding vane 3 and the rolling piston 2 is set to be greater than the range of the eccentric swing angle of the rolling piston 2 to ensure good cooperation between the sliding vane 3 and the rolling piston 2, reduce friction and wear, and improve the efficiency and reliability of the compressor.
[0059] Further, the thickness of the connecting end of the sliding vane 3 corresponding to the minimum width at the notch of the arc groove c is set to be narrowed, so as to form a fitting convex portion 31 adapted to the arc groove c at the end of the connecting end of the sliding vane 3.
[0060] The fitting convex portion 31 is a protruding part of the connecting end of the sliding vane 3, and its shape matches the arc groove c, and is used to form a fit with the arc groove c of the rolling piston 2 to ensure that the rolling piston 2 can swing around the fitting convex portion 31.
[0061] Since the driving force for driving the sliding vane 3 to move is provided by the motor, and the force provided by the motor can change with the frequency, by setting the cooperation between the fitting convex portion 31 and the arc groove c, the sliding vane 3 is always sleeved in the arc groove c, solving the risk that the sliding vane 3 disengages from the rolling piston 2 due to high-speed operation.
[0062] Since only the relative rotation movement between the fitting convex portion 31 and the arc groove c occurs between the rolling piston 2 and the sliding vane 3, the arc groove c separates the high-temperature and high-pressure area on the surface of the rolling piston 2, solving the problems of cold quantity decrease, input increase and large oil discharge of the compressor caused by piston self-rotation in the prior art.
[0063] It should also be noted that the sliding vane 3 and the rolling piston 2 are directly in surface contact through a hinged manner, and there is no need to set a spring to provide an elastic force, so there is no need to set a spring hole in the cylinder 1, reducing the manufacturing cost and manufacturing difficulty of the cylinder 1.
[0064] Specifically, please refer toFigure 5 and Figure 7 In one embodiment, the radius of the arc groove c is r, and s < r. With this setting, the dimension of the connecting end of the sliding vane 3 corresponding to the notch of the arc groove c is much smaller than the diameter of the arc groove c. Thus, the mating convex portion 31 can be closely fitted with the arc groove c and will not disengage from the arc groove c when moving relative to the rolling piston 2.
[0065] Specifically, please refer to Figure 5 In one embodiment, t < r. With this setting, the width of the notch of the arc groove c is less than the arc groove c, and the mating convex portion 31 is adapted to the arc groove c, indicating that the width of the notch of the arc groove c is much smaller than the diameter of the mating convex portion 31. Thus, the mating convex portion 31 can also be closely fitted with the arc groove c and will not disengage from the arc groove c when moving relative to the rolling piston 2.
[0066] Further, in one embodiment, the central angle of the arc groove c is set to be greater than 180°. Correspondingly, the cross-section of the mating convex portion 31 is arc-shaped, and the central angle of the arc is set to be greater than 180°.
[0067] It should be noted that the central angle of the arc groove c refers to the central angle of the arc groove c. The cross-section of the mating convex portion 31 refers to the cross-section where the mating convex portion 31 contacts the arc groove c. The central angle of the mating convex portion 31 refers to the central angle corresponding to the cross-section of the mating convex portion 31.
[0068] By setting the central angles of the arc groove c and the mating convex portion 31 to be greater than 180°, it can be ensured that the mating convex portion 31 is always within the arc groove c, enabling the sliding vane 3 to have a better contact area with the rolling piston 2 during operation, thereby improving the stability of the fit.
[0069] Further, please refer to Figure 5 In this embodiment, the radius of the rolling piston 2 is R, and L + r < R.
[0070] It should be noted that the radius R of the rolling piston 2 is the distance from the center of the rolling piston 2 to the edge of the rolling piston 2.
[0071] Thus, L + r < R, that is, the depth of the arc groove c is greater than the diameter of the arc groove c. The distance between the peripheral edge of the notch of the arc groove c and the outer peripheral surface of the rolling piston 2 is sufficient to ensure the strength here. By offsetting the arc groove c from the outer peripheral edge of the rolling piston 2, it is ensured that the fit between the connecting end of the sliding vane 3 and the arc groove c is closer, improving the reliability and durability of the sliding vane type rolling compressor.
[0072] Further, please refer to Figure 5 and Figure 7 , in this embodiment, the thickness of the sliding vane 3 is d, the radius of the arc groove c is r, and d > 2r.
[0073] It should be noted that the sliding vane 3 contacts the wall surface of the sliding groove b on the wall of the cylinder 1 and plays a sealing role during the compression process. Since the friction between the sliding vane 3 and the wall of the cylinder 1 is smaller, the energy loss during the operation of the compressor is less, and the efficiency is higher. In order to ensure that the sliding vane 3 can effectively seal and reduce wear, it is usually necessary to perform surface treatment on the two side portions in the thickness direction of the sliding vane 3 to make its surface smoother.
[0074] In order to avoid synchronously wearing the mating convex portion 31 when polishing the two side portions in the thickness direction of the sliding vane 3, the mating convex portion 31 cannot be in surface contact with the arc groove c. The thickness d of the sliding vane 3 is set to be greater than the diameter of the arc groove c, that is, the thickness of the sliding vane 3 is even greater than the cross-sectional diameter of the mating convex portion 31. In this way, when the main body portion of the sliding vane 3 is polished, the polishing surface will not contact the outer surface of the mating convex portion 31, avoiding the wear of the mating convex portion 31.
[0075] Further, please refer to Figure 5 and Figure 7 , in this embodiment, on the two side surfaces in the thickness direction of the connecting end of the sliding vane 3, arc-shaped concave surfaces are formed at the notch corresponding to the arc groove c; and / or, chamfers are provided at the periphery of the notch of the arc groove c.
[0076] In this way, when the rolling piston 2 rotates relative to the sliding vane 3, the chamfers can reduce the stress concentration at the notch, preventing cracks or damage to the sliding vane 3 or the rolling piston 2 at this location. And the chamfers provide a smooth transition, helping the end portion of the sliding vane 3 to cooperate with the arc groove c more smoothly, reducing the jamming phenomenon. The chamfers can reduce the wear between the sliding vane 3 and the notch of the arc groove c, extending the service life of the sliding vane 3 and the rolling piston 2.
[0077] The chamfers are preferably arc chamfers. Of course, other possible shapes can also be set, and this specification does not limit this.
[0078] The present utility model also proposes a compressor, which includes a housing and a compression cylinder 1 provided in the housing. The specific structure of the compression cylinder 1 refers to the above embodiment. Since this compressor adopts all the technical solutions of the above all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here.
[0079] Specifically, in this embodiment, the compressor includes a carbon dioxide compressor. A carbon dioxide compressor is a special compressor that uses carbon dioxide as the working medium and is usually used in a refrigeration system called "carbon dioxide transcritical cycle". It has no destructive effect on the ozone layer. In some application scenarios, the carbon dioxide system can achieve higher energy efficiency than traditional refrigeration systems, operate within a relatively wide temperature range, and is suitable for various refrigeration and air-conditioning applications.
[0080] The present utility model 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 this refrigeration device adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, which will not be elaborated here one by one.
[0081] The above is only an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.
Claims
1. A compression cylinder, characterized in that: include: A cylinder, wherein the cylinder has a working chamber and a slide groove communicating with the working chamber, wherein the slide groove extends along a radial direction of the cylinder; A rolling piston, driven by the crankshaft to eccentrically swing in the working chamber, wherein the outer peripheral wall of the rolling piston is concavely provided with an arc groove; and, A sliding plate is slidably installed in the sliding groove along the radial direction of the cylinder, the sliding plate has a thickness direction extending along the circumferential direction of the rolling piston, and the sliding plate has a connecting end close to the rolling piston and matched with the arc groove, so that the rolling piston can swing around the connecting end of the sliding plate; The radius of the arc groove is r, the minimum width of the arc groove at the notch is t, the thickness of the connecting end of the sliding plate corresponding to the minimum width of the arc groove at the notch is s, the eccentricity of the rolling piston is e, and the distance between the center of the arc groove and the center of the rolling piston is L.
2. The compressed air cylinder according to claim 1, characterized in that The thickness of the connecting end of the slide plate corresponding to the minimum width of the arc groove at the groove mouth is narrowed, so as to form a matching protrusion matched with the arc groove at the end of the connecting end of the slide plate.
3. The compressed air cylinder according to claim 2, characterized in that s＜r。 4. The compressed air cylinder according to claim 2, characterized in that t＜r。 5. The compressed air cylinder according to claim 2, characterized in that: The arc center angle of the circular arc groove is set to be greater than 180°. Correspondingly, the cross section of the matching protrusion is set to be arc-shaped, and the arc center angle of the arc is set to be greater than 180°.
6. The compressed air cylinder according to claim 2, characterized in that: The distance between the center of the circular arc groove and the center of the rolling piston is L, the radius of the circular arc groove is r, the radius of the rolling piston is R, and L+r<R.
7. The compressed air cylinder according to claim 2, characterized in that: The thickness of the sliding piece and the sliding groove at the sliding fit point is d, the radius of the arc groove is r, and d>2r.
8. The compressed air cylinder according to claim 2, characterized in that The connecting ends of the slide are located at two side surfaces in the thickness direction, and arc-shaped concave surfaces are formed at the notches corresponding to the arc grooves; and / or, The arc groove is provided with a chamfer at the periphery of the groove opening.
9. A compressor, characterized in that: Comprising a compression cylinder as claimed in any one of claims 1 to 8.
10. The compressor according to claim 9, characterized in that The compressor comprises a carbon dioxide compressor.
11. A refrigeration device, characterized in that: Comprising a compressor as claimed in claim 9 or 10.