Scroll compressor and refrigeration equipment

Abstract

The utility model discloses a scroll compressor and refrigeration equipment, and relates to the technical field of compressors. The scroll compressor comprises a static scroll plate, a dynamic scroll plate and a main rack, and an air suction port is formed in one side of the static scroll plate; the movable scroll plate and the static scroll plate are matched to define a compression cavity communicated with the air suction port; the main machine frame is provided with a supporting ring and pressure cavities located on the inner side and the outer side of the supporting ring, the movable scroll plate is movably installed on the supporting ring, and the pressure cavities are used for providing pressure for pressing the movable scroll plate towards the static scroll plate; the end face, deviating from the static scroll plate, of the movable scroll plate and / or the upper end face of the supporting ring are / is provided with receding positions in the area away from the air suction opening so that the pressure of the pressure cavity in the area away from the air suction opening on the movable scroll plate can be increased. According to the technical scheme, the local stress between the movable scroll plate and the static scroll plate can be reduced, the abrasion between the movable scroll plate and the static scroll plate is reduced, and the friction loss of the compressor is reduced.

Description

Technical Field

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

[0002] The scroll compressor includes a fixed scroll, an orbiting scroll and a crankshaft. The orbiting scroll is installed on the crankshaft. The orbiting scroll and the fixed scroll are assembled together and can move relative to the fixed scroll. When the scroll compressor is working, the eccentric movement of the crankshaft drives the orbiting scroll to move, so that the refrigerant forms a continuous operation of suction, compression and discharge in the compression chamber defined by the fixed scroll and the orbiting scroll, thereby realizing the suction, compression and exhaust process of the compressor.

[0003] During the operation of the scroll compressor, the orbiting scroll tends to tilt, and the end faces of the orbiting scroll and the fixed scroll are prone to local wear, which increases the friction power consumption of the compressor. Utility Model Content

[0004] The main purpose of the utility model is to provide a scroll compressor, aiming to improve the local wear between the mating end surfaces of the orbiting scroll and the stationary scroll, and reduce the friction power consumption of the compressor.

[0005] To achieve the above-mentioned purpose, the scroll compressor proposed in the present invention includes:

[0006] A static vortex disk with an air intake on one side;

[0007] an orbiting scroll, cooperating with the fixed scroll to define a compression chamber communicating with the suction port; and

[0008] A main frame is provided with a support ring and pressure chambers located on both sides of the support ring. The orbiting scroll is movably mounted on the support ring. The pressure chamber is used to provide pressure to press the orbiting scroll toward the fixed scroll.

[0009] The end surface of the movable scroll away from the fixed scroll and / or the upper end surface of the support ring is provided with a relief position in an area away from the air intake, and the relief position is communicated with the pressure chamber to increase the pressure of the pressure chamber on the movable scroll in the area away from the air intake.

[0010] In one embodiment of the present application, the orbiting scroll includes an end plate and a hub portion provided at an end of the end plate facing away from the fixed scroll;

[0011] The pressure chamber includes an assembly chamber located inside the support ring and a back pressure chamber outside the support ring, the hub is movably arranged in the assembly chamber, and the end plate is arranged above the assembly chamber, the support ring and the back pressure chamber;

[0012] The end plate and / or the support ring is provided with a first avoidance position communicating with the back pressure cavity;

[0013] And / or, the end plate and / or the support ring is provided with a second avoidance position communicating with the assembly cavity.

[0014] In one embodiment of the present application, the first avoidance position is provided on the outer side of the support ring away from the air inlet;

[0015] The first avoidance position is an avoidance gap formed on the outer side of the upper end surface of the support ring.

[0016] In one embodiment of the present application, the support ring is in a circular ring shape, and the avoidance gap extends in an arc shape along the circumference of the support ring.

[0017] In one embodiment of the present application, the angle between the two ends of the avoidance gap in the extension direction and the center line of the support ring is α, which satisfies: 5°<α<170°.

[0018] In one embodiment of the present application, the avoidance gap extends axially to the bottom surface of the back pressure cavity.

[0019] In one embodiment of the present application, the second avoidance position is provided on the inner side of the region of the support ring away from the air inlet;

[0020] The second avoidance position is formed by the inner side wall of the support ring expanding outward in a direction away from the center of the support ring.

[0021] In one embodiment of the present application, the inner circumferential wall of the support ring includes a first arc segment and a second arc segment connected in the circumferential direction, the second arc segment is located on the side of the first arc segment away from the air intake, and the radius of the second arc segment is greater than the radius of the first arc segment, forming the second avoidance position.

[0022] In one embodiment of the present application, the angle β corresponding to the second arc segment satisfies 5°<β<170°.

[0023] In one embodiment of the present application, the avoidance position extends along the circumference of the support ring, and in a projection on the cross section of the support ring, the avoidance position is axially symmetrical with respect to a center line of the air intake.

[0024] In one embodiment of the present application, the scroll compressor also includes a cross slip ring, and the main frame is provided with two first keyways for cooperating with the cross slip ring, the two first keyways are located outside the radial sides of the support ring, and the avoidance position is located on the side of the diameter where the center lines of the two first keyways are located away from the suction port.

[0025] In one embodiment of the present application, the scroll compressor further includes a sealing assembly, the upper end surface of the support ring is provided with a sealing groove, the sealing assembly is installed in the sealing groove and abuts against the end plate to seal and separate the assembly cavity and the back pressure cavity.

[0026] In one embodiment of the present application, the circumferential shape of the sealing groove is consistent with the circumferential shape of the inner wall of the support ring.

[0027] To achieve the above objectives, the present application also provides a refrigeration device, including the above scroll compressor.

[0028] In the scroll compressor of the present invention, the movable scroll can be movably mounted on the support ring of the main frame, so that the movable scroll can change the size of the compression chamber by moving relative to the fixed scroll, thereby realizing the functions of suction, compression and exhaust. By setting a clearance position in the area where the end face of the movable scroll is away from the fixed scroll and / or the upper end face of the support ring is away from the suction port, the contact area between the movable scroll and the pressure chamber in the area away from the suction port is increased, and the pressure of the pressure chamber on the movable scroll in the area away from the suction port is increased, which can improve the degree of overturning of the movable scroll or prevent the movable scroll from overturning, thereby reducing the local stress between the movable scroll and the fixed scroll, reducing the wear between the movable scroll and the fixed scroll, and reducing the friction loss of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] 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.

[0030] Figure 1 This is a structural diagram of an embodiment of the invention in which the movable scroll and the main frame cooperate;

[0031] Figure 2 for Figure 1 A top view of an embodiment;

[0032] Figure 3 for Figure 1 A schematic structural diagram of a main frame of an embodiment;

[0033] Figure 4 for Figure 1 A schematic diagram of the structure of the main frame, fixed scroll and orbiting scroll in the embodiment;

[0034] Figure 5 This is a structural diagram of another embodiment of the cooperation between the movable scroll and the main frame in the embodiment of the present utility model;

[0035] Figure 6 for Figure 5 A top view of an embodiment;

[0036] Figure 7 for Figure 5 A schematic structural diagram of a main frame of an embodiment;

[0037] Figure 8 for Figure 5 A schematic diagram of the structure of the main frame, fixed scroll and orbiting scroll in the embodiment;

[0038] Figure 9 This is a structural diagram of another embodiment of the cooperation between the movable scroll and the main frame in the embodiment of the present utility model;

[0039] Figure 10 for Figure 9 A top view of an embodiment;

[0040] Figure 11 for Figure 9 A schematic structural diagram of a main frame of an embodiment;

[0041] Figure 12 for Figure 9 Schematic diagram of the matching structure of the main frame, the fixed scroll and the orbiting scroll in the embodiment.

[0042] Description of Figure Numbers:

[0043] Label name Label name 1 static scroll 32 Stator support 101 Inlet 301 Assembly cavity 2 Orbiting scroll 302 Back pressure chamber 21 End Plate 303 Crankshaft hole 22 hub 304 sealing groove 3 Main frame 305 First keyway 31 Support ring 4 Cross slip ring 311 First avoidance position 5 Sealing components 312 Second avoidance position 51 sealing ring 31a First arc segment 52 elastic parts 31b The second arc segment

[0044] 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

[0045] 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 are within the scope of protection of the present invention.

[0046] 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 various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0047] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or an option in which both A and B are satisfied.

[0048] 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 specified as "first" or "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is 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.

[0049] The utility model proposes a scroll compressor, which aims to improve the matching structure between the main frame and the orbiting scroll, improve the inclination degree of the orbiting scroll during operation, improve the local wear between the matching end surfaces of the orbiting scroll and the static scroll, reduce the friction power consumption of the compressor, and improve the energy efficiency of the compressor.

[0050] In the embodiment of the present utility model, Figures 1 to 6 As shown, the scroll compressor includes a fixed scroll 1, an orbiting scroll 2, and a main frame 3. An air inlet 101 is provided on one side of the fixed scroll 1. The orbiting scroll 2 cooperates with the fixed scroll 1 to define a compression chamber connected to the air inlet 101. The main frame 3 is provided with a support ring 31 and pressure chambers (301 / 302) located on both sides of the support ring 31. The orbiting scroll 2 is movably mounted on the support ring 31. The pressure chambers (301 / 302) are used to provide pressure to press the orbiting scroll 2 toward the fixed scroll 1. The end surface of the orbiting scroll 2 facing away from the fixed scroll 1 and / or the upper end surface of the support ring 31 are provided with a relief position (311 / 312) in an area away from the air inlet 101. The relief position (311 / 312) is connected to the pressure chamber (301 / 302) to increase the pressure of the pressure chamber (301 / 302) on the orbiting scroll 2 in the area away from the air inlet 101.

[0051] It can be understood that in the scroll compressor, the movable scroll 2 is connected to the static scroll 1, and the movable scroll teeth of the movable scroll 2 and the static scroll teeth form a number of crescent-shaped compression chambers. The movable scroll 2 is movably mounted on the support ring 31 of the main frame 3. At the same time, the movable scroll 2 is pressed toward the static scroll 1 under the pressure of the pressure chamber (301 / 302), so that the end face of the movable disk end plate 21 and the end face of the static scroll 1 are abutted and sealed. The size of the compression chamber is changed by the movement of the movable scroll 2 relative to the static scroll 1, thereby realizing the functions of suction, compression and exhaust. Since the pressures in different crescent-shaped compression chambers are different, and the movable scroll 2 is driven by the crankshaft, the movable scroll 2 will be subjected to pressures at different positions, resulting in the point of action of the axial resultant force of the movable scroll 2 not being at the center of the movable scroll 2, but biased toward the compression chamber area where the outer line of the movable scroll 2 and the inner line of the fixed scroll 1 are combined, generating a torque, causing the movable scroll 2 to have a tilting tendency or even be in a slightly tilted state during operation, which will cause the local stress on the mating surface between the movable scroll 2 and the fixed scroll 1 near the intake port 101 to be larger, resulting in increased wear in the area near the intake port 101. Based on this, in this embodiment, an avoidance position (311 / 312) is set in an area away from the air intake port 101 by setting the end surface of the movable scroll 2 away from the fixed scroll 1 and / or the upper end surface of the support ring 31, thereby increasing the contact area between the movable scroll 2 and the pressure chamber (301 / 302) in the area away from the air intake port 101, thereby increasing the pressure of the pressure chamber (301 / 302) on the movable scroll 2 in the area away from the air intake port 101, that is, increasing the supporting force of the movable scroll 2 in the opposite direction of the tilt direction, reducing the tilt degree of the movable scroll 2 toward the side away from the air intake port 101, improving the overturning degree of the movable scroll 2 or preventing the movable scroll 2 from overturning, thereby reducing the local stress between the movable scroll 2 and the fixed scroll 1, reducing the wear between the movable scroll 2 and the fixed scroll 1, and reducing the friction loss of the compressor.

[0052] It should be noted that the pressure chamber (301 / 302) in this embodiment is not limited to a specific pressure chamber (301 / 302). It can be determined according to actual conditions. For example, it can be a high-pressure chamber connected to the scroll compressor casing, or it can be a medium- and low-pressure chamber connected to the compression chamber, etc. The specific setting method is not limited here, as long as it can provide back pressure for the movable scroll disk 2.

[0053] The end face of the orbiting scroll 2 facing away from the fixed scroll 1 and / or the upper end face of the support ring 31 are provided with a clearance position (311 / 312). It is understandable that only the end face of the orbiting scroll 2 facing away from the fixed scroll 1 is provided with the clearance position (311 / 312), or only the upper end face of the support ring 31 is provided with the clearance position (311 / 312), or the end face of the orbiting scroll 2 facing away from the fixed scroll 1 and the upper end face of the support ring 31 are provided with the clearance position (311 / 312). In actual application, considering that the orbiting scroll 2 is in motion when the compressor is running and the main frame 3 is in a stationary state, it is possible to adopt the arrangement of providing the clearance position (311 / 312) only on the upper end face of the support ring 31, which can ensure the structural strength of the orbiting scroll 2 and is easier to manufacture. The upper end surface of the support ring 31 is provided with a relief position (311 / 312) in an area away from the air intake 101. It is understandable that the relief position (311 / 312) plays a role in avoiding the orbiting scroll 2. On the one hand, it can prevent the local stress concentration and wear of the lower end surface and the upper end surface of the support ring 31 when the orbiting scroll 2 tilts. On the other hand, the relief position can increase the contact area between the orbiting scroll 2 and the pressure chamber (301 / 302) in the area away from the air intake 101, increase the local pressure of the orbiting scroll 2, and make the orbiting scroll 2 return to the center during operation, reducing the degree of overturning. Optionally, the specific position of the relief position can be determined according to actual conditions. For example, it can be the farthest side relative to the air intake 101, or it can be the side farther away from the air intake 101, etc., as long as the relief position is not on the side close to the air intake 101. As an example, taking the central axis of the support ring 31 as an example, the relief position can be located near the radially opposite side relative to the air intake 101. Optionally, the avoidance position may be a notch, a through hole, a groove structure, etc.

[0054] In summary, in the scroll compressor of the technical solution of the present invention, the movable scroll 2 is movably mounted on the support ring 31 of the main frame 3, so that the movable scroll 2 can move relative to the fixed scroll 1 to change the size of the compression chamber, thereby realizing the functions of suction, compression and exhaust. By setting a avoidance position (311 / 312) in the area where the end face of the movable scroll 2 is away from the fixed scroll 1 and / or the upper end face of the support ring 31 is away from the air inlet 101, the contact area between the movable scroll 2 and the pressure chamber (301 / 302) in the area away from the air inlet 101 is increased, and the pressure of the pressure chamber (301 / 302) on the movable scroll 2 in the area away from the air inlet 101 is increased, which can improve the degree of overturning of the movable scroll 2 or prevent the movable scroll 2 from overturning, thereby reducing the local stress between the movable scroll 2 and the fixed scroll 1, reducing the wear between the movable scroll 2 and the fixed scroll 1, and reducing the friction loss of the compressor.

[0055] In one embodiment of the present application, Figures 1 to 8The movable scroll 2 includes an end plate 21 and a hub 22 located at the end of the end plate 21 away from the fixed scroll 1; the pressure chamber (301 / 302) includes an assembly chamber 301 located on the inner side of the support ring 31 and a back pressure chamber 302 on the outer side, the hub 22 is movably arranged in the assembly chamber 301, and the end plate 21 is arranged above the assembly chamber 301, the support ring 31 and the back pressure chamber 302; the end plate 21 and / or the support ring 31 is provided with a first avoidance position 311 communicating with the back pressure chamber 302; and / or the end plate 21 and / or the support ring 31 is provided with a second avoidance position 312 communicating with the assembly chamber 301.

[0056] As will be appreciated, the main frame 3 also includes a stator support portion 32 disposed on the periphery of the support ring 31. The fixed scroll 1 is mounted on the stator support portion 32, forming a backpressure chamber 302 between the stator support portion 32 and the support ring 31. The end plate 21 of the orbiting scroll 2 is disposed inside the stator support portion 32, above the assembly chamber 301, the support ring 31, and the backpressure chamber 302. A crankshaft hole 303 for mounting a crankshaft is provided within the support ring 31. The assembly chamber 301 communicates with the crankshaft hole 303, allowing the crankshaft to pass through the crankshaft hole 303 into the assembly chamber 301 and drive-connect to the hub 22, thereby enabling the crankshaft to rotate and drive the orbiting scroll 2. The assembly chamber 301 corresponds to the inner bore of the support ring 31. Optionally, the inner radial dimension of the assembly chamber 301 is greater than the outer radial dimension of the hub 22, providing sufficient space for the hub 22 to operate eccentrically.

[0057] In actual use, the crankshaft is provided with an oil supply passage connecting the outside of the compression chamber and the assembly chamber 301. Therefore, it can be understood that the assembly chamber 301 is a high-pressure chamber. The back-pressure chamber 302 outside the support ring 31 can communicate with the compression chamber via an air passage and can be a medium-pressure chamber. In other words, both the assembly chamber 301 inside the support ring 31 and the back-pressure chamber 302 outside the support ring 31 can generate upward pressure on the end plate 21 of the orbiting scroll 2.

[0058] In this embodiment, the end plate 21 and / or the support ring 31 are provided with a first avoidance position 311 connected to the back pressure chamber 302. It can be understood that only the end plate 21 is provided with the first avoidance position 311, or only the support ring 31 is provided with the first avoidance position 311, or both the end plate 21 and the support ring 31 are provided with the first avoidance position 311.

[0059] The end plate 21 and / or the support ring 31 are provided with a second avoidance position 312 connected to the assembly cavity 301. It can be understood that only the end plate 21 is provided with the second avoidance position 312, or only the support ring 31 is provided with the second avoidance position 312, or both the end plate 21 and the support ring 31 are provided with the second avoidance position 312.

[0060] Among them, only the end plate 21 can be set with the first avoidance position 311 and the second avoidance position 312 at the same time, or only the support ring 31 can be set with the first avoidance position 311 and the second avoidance position 312 at the same time, or the end plate 21 can be set with one of the first avoidance position 311 and the second avoidance position 312, and the support ring 31 can be set with the other one of the first avoidance position 311 and the second avoidance position 312.

[0061] It should be noted that whether the end plate 21 or the support ring 31 is set with an avoidance position, it can increase the upward pressure on the area of ​​the end plate 21 of the movable scroll 2 away from the suction port 101, enhance the righting effect of the movable scroll 2 to reduce the overturning, and achieve the effect of reducing wear.

[0062] In actual application, considering that the movable scroll 2 is in motion when the compressor is running and the main frame 3 is in a stationary state, it is preferred to set an avoidance position (311 / 312) on the upper end surface of the support ring 31. Optionally, the setting position of the avoidance position can be determined according to actual conditions.

[0063] like Figures 1 to 4 In one embodiment of the present application, a first avoidance position 311 is provided on the outer side of the area of ​​the support ring 31 away from the air inlet 101 ; the first avoidance position 311 is an avoidance gap formed on the outer side of the upper end surface of the support ring 31 .

[0064] In this embodiment, the first avoidance position 311 is located on the outside of the upper end surface of the support ring 31 away from the air intake port 101, which increases the contact area between the back pressure chamber 302 away from the air intake port 101 and the end plate 21 of the movable scroll 2, thereby increasing the upward back pressure of the back pressure chamber 302 on the movable scroll 2 in this side area, so that the inclination degree of the movable scroll 2 is reduced or not tilted, thereby reducing the wear between the movable scroll 2 and the fixed scroll 1.

[0065] As an example, the first avoidance position 311 is a avoidance notch formed outside the upper end surface of the support ring 31. Optionally, the avoidance notch can be a notch only near the upper end surface of the support ring 31, or the avoidance notch can also be a notch extending axially to the bottom surface of the back pressure cavity 302.

[0066] Furthermore, the support ring 31 is annular, with the relief notch extending in an arc shape along the circumference of the support ring 31. This design, taking into account the eccentric operation of the orbiting scroll 2, ensures that the force distribution on the end plate 21 of the orbiting scroll 2 at the relief notch is more uniform, thereby improving the operational stability of the orbiting scroll 2. Furthermore, extending the relief notch in an arc shape increases the area of ​​the orbiting scroll 2 exposed to back pressure, further enhancing the back pressure of the orbiting scroll 2. It is understandable that after providing the relief notch in the annular support ring 31, the support ring 31 appears to have a roughly fan-shaped structure, which shifts the center of action of the axial resultant force of the orbiting scroll 2 away from the intake port 101, thereby reducing the risk of the orbiting scroll 2 tipping over.

[0067] Optionally, the angle α between the two ends of the avoiding gap in the extending direction and the center line of the support ring 31 satisfies: 5°<α<170°.

[0068] It is understood that the circumferential coverage area of ​​the relief notch should be neither too large nor too small. If it is too small, it will have little effect on reducing the tilting of the orbiting scroll 2. If it is too large, it may affect the structural strength of the support ring 31. Therefore, in this embodiment, the angle α between the two ends of the relief notch and the center of the support ring 31 is set to meet the following conditions: 5° < α < 170°. This reduces the tilting of the orbiting scroll 2 while ensuring the structural strength of the support ring 31.

[0069] like Figures 5 to 8 In one embodiment of the present application, a second avoidance position 312 is provided on the inner side of the support ring 31 away from the air inlet 101 ; the second avoidance position 312 is formed by the inner side wall of the support ring 31 expanding outward in a direction away from the center of the support ring 31 .

[0070] In this embodiment, the second avoidance position 312 is located on the inner side of the upper end surface of the support ring 31 away from the air intake port 101. On the one hand, the contact area between the assembly cavity 301 away from the air intake port 101 and the end plate 21 of the movable scroll 2 is increased, and the upward pressure of the assembly cavity 301 on the movable scroll 2 in this side area is increased. On the other hand, the axial force center of the movable scroll 2 is offset toward the area away from the air intake port 101, so that the inclination degree of the movable scroll 2 is reduced or not tilted, thereby reducing the wear between the movable scroll 2 and the fixed scroll 1.

[0071] It is understandable that the specific structural form of the second avoidance position 312 can be determined according to actual conditions, and can be, for example, a notch structure or a convex structure. In this embodiment, considering that the second avoidance position 312 is located in the inner ring of the support ring 31, in order to ensure the structural strength of the support ring 31, as an example, the second avoidance position 312 can be formed by the inner sidewall of the support ring 31 expanding outward in a direction away from the center of the support ring 31, that is, the inner sidewall of the support ring 31 is configured to protrude outward relative to the center.

[0072] Specifically, the inner circumferential wall of the support ring 31 includes a first arc segment 31a and a second arc segment 31b connected in the circumferential direction. The second arc segment 31b is located on the side of the first arc segment 31a away from the air intake 101. The radius of the second arc segment 31b is greater than the radius of the first arc segment 31a. The area where the second arc segment 31b expands outward relative to the extension line of the contour line of the first arc segment 31a forms a second avoidance position 312.

[0073] Such a design makes the inner circumferential wall of the support ring 31 a smooth wall surface in the circumferential direction. Compared with the inner circumferential wall having a step-like sudden change, on the one hand, it can prevent the hub 22 of the movable scroll 2 from colliding and wearing with the step when operating in the assembly cavity 301. On the other hand, the use of arc segments makes production and manufacturing more convenient and improves production efficiency. It can be understood that the first arc segment 31a is the inner wall of the conventional support ring 31 in the related technology, and the second arc segment 31b is expanded outward relative to the extension line of the first arc segment 31a to form a second avoidance position 312. The second arc segment 31b is the inner wall corresponding to the second avoidance position 312 in this embodiment. The radius of the second arc segment 31b is greater than the radius of the first arc segment 31a, which increases the contact area between the assembly cavity 301 and the movable scroll 2 in the area away from the suction port 101. At the same time, it can make the resultant point of the upward pressure on the movable scroll 2 in the assembly cavity 301 offset toward the side away from the suction port 101, further improving the overturning improvement effect of the movable scroll 2.

[0074] Optionally, the angle β corresponding to the second arc segment 31b satisfies 5° < β < 170°. It is understood that the circumferential extension area of ​​the second avoidance position 312 should not be too large or too small. If it is too small, it will have little effect on reducing the tilting of the orbiting scroll 2. If it is too large, it may affect the structural strength of the support ring 31 itself. Therefore, in this embodiment, the angle β corresponding to the second arc segment 31b is set to satisfy 5° < β < 170°. This reduces the tilting of the orbiting scroll 2 while ensuring the structural strength of the support ring 31.

[0075] like Figures 9 to 12In other embodiments of the present application, a first avoidance position 311 can be set on the outer side of the support ring 31, and a second avoidance position 312 can be set on the inner side of the support ring 31. This can further increase the pressure of the movable scroll 2 in the area away from the suction port 101, thereby achieving a better effect of preventing the movable scroll 2 from overturning.

[0076] In order to further enhance the effect of improving the overturning of the orbiting scroll 2, in one embodiment of the present application, the avoidance position (311 / 312) extends along the circumference of the support ring 31, and in the projection on the cross section of the support ring 31, the avoidance position (311 / 312) is arranged axially symmetrically with respect to the center line of the suction port 101.

[0077] It can be understood that by setting the avoidance position (311 / 312) to extend circumferentially along the support ring 31 and being axially symmetrical with respect to the center line of the intake port 101, the back pressure distribution of the movable scroll 2 at the corresponding avoidance position (311 / 312) is roughly symmetrical with respect to the center line of the intake port 101, so that the resultant position of the upward supporting force of the movable scroll 2 in the area away from the intake port 101 is roughly corresponding to the center line of the intake port 101, thereby achieving a better effect of preventing the movable scroll 2 from overturning.

[0078] In one embodiment of the present application, Figure 3 、 Figure 4 、 Figure 7 、 Figure 8 as well as Figure 12 The scroll compressor also includes a cross ring 4. The main frame 3 is provided with two first key grooves 305 for cooperating with the cross ring 4. The two first key grooves 305 are located outside the radial sides of the support ring 31, and the avoidance position (311 / 312) is located on the side of the center line of the two first key grooves 305 that is away from the suction port 101.

[0079] It is understandable that the axial ends of the cross ring 4 are respectively limited with the movable scroll 2 and the main frame 3 to prevent the movable scroll 2 from rotating. The two first keyways 305 are provided on the radially outer sides of the support ring 31. It is understandable that the two first keyways 305 are located on opposite sides of the back pressure chamber 302, and the center lines of the two first keyways 305 pass through the center of the support ring 31. In this embodiment, by setting the avoidance position (311 / 312) on the side of the diameter of the center lines of the two first keyways 305 away from the air inlet 101, the upward back pressure of the back pressure chamber 302 on the movable scroll 2 in the area away from the air inlet 101 can be increased, thereby achieving a better effect of preventing the movable scroll 2 from overturning.

[0080] Optionally, the avoidance position (311 / 312) is located between the two first key grooves 305. While ensuring that the movable scroll plate 2 is prevented from overturning, the avoidance position will not interfere with the first key groove 305, thereby ensuring the assembly reliability of the first key groove 305 and the cross ring 4.

[0081] In one embodiment of the present application, Figure 4 The scroll compressor also includes a sealing assembly 5. The upper end surface of the support ring 31 is provided with a sealing groove 304. The sealing assembly 5 is installed in the sealing groove 304 and abuts against the end plate 21 to seal and separate the assembly cavity 301 and the back pressure cavity 302.

[0082] As can be understood from the aforementioned embodiment, the assembly chamber 301 is a high-pressure chamber, and the back-pressure chamber 302 is a medium-to-low-pressure chamber. By providing a sealing assembly 5 on the support ring 31 to abut and seal against the end plate 21 of the orbiting scroll 2, cross-flow between the assembly chamber 301 and the back-pressure chamber 302 can be prevented. Optionally, the sealing assembly 5 includes a sealing ring 51 and an elastic member 52. The elastic member 52 is installed in the sealing groove 304. The sealing ring 51 is positioned above the elastic member 52 to engage with the orbiting scroll 2. Optionally, the elastic member 52 is a wave spring.

[0083] Furthermore, the circumferential shape of the sealing groove 304 is consistent with the circumferential shape of the inner wall of the support ring 31. It is understandable that the end surface of the support ring 31 may not contact the end plate 21 of the orbiting scroll 2. In this case, the high-pressure chamber and the intermediate-pressure chamber are separated by the sealing assembly 5. Therefore, based on the provision of a relief position on the support ring 31, the circumferential shape of the sealing groove 304 is consistent with the circumferential shape of the inner wall of the support ring 31. This can ensure that the pressure on the end plate 21 of the orbiting scroll 2 on the assembly chamber 301 side and / or the back-pressure chamber 302 side away from the suction port 101 increases, thereby preventing the orbiting scroll 2 from overturning.

[0084] In addition, such a design ensures that the thickness of the groove wall of the sealing groove 304 and the inner wall or outer wall of the support ring 31 are consistent in the circumferential direction, further improving the structural strength.

[0085] The present utility model also proposes a refrigeration device, which includes a scroll compressor. The specific structure of the scroll compressor refers to the above-mentioned embodiment. Since the present refrigeration device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be described one by one here.

[0086] Optionally, the refrigeration equipment includes air conditioners, refrigerators, or cold chain transport vehicles, etc.

[0087] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention specification and drawings under the utility model concept, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A scroll compressor, characterized in that: include: A static vortex disk with an air intake on one side; an orbiting scroll, cooperating with the fixed scroll to define a compression chamber connected to the suction port; as well as A main frame is provided with a support ring and pressure chambers located on both sides of the support ring. The orbiting scroll is movably mounted on the support ring. The pressure chamber is used to provide pressure to press the orbiting scroll toward the fixed scroll. The end surface of the movable scroll away from the fixed scroll and / or the upper end surface of the support ring is provided with a relief position in an area away from the air intake, and the relief position is communicated with the pressure chamber to increase the pressure of the pressure chamber on the movable scroll in the area away from the air intake.

2. The scroll compressor according to claim 1, wherein The orbiting scroll includes an end plate and a hub portion provided at one end of the end plate away from the fixed scroll; The pressure chamber includes an assembly chamber located inside the support ring and a back pressure chamber outside the support ring, the hub is movably arranged in the assembly chamber, and the end plate is arranged above the assembly chamber, the support ring and the back pressure chamber; The end plate and / or the support ring is provided with a first avoidance position communicating with the back pressure cavity; And / or, the end plate and / or the support ring is provided with a second avoidance position communicating with the assembly cavity.

3. The scroll compressor according to claim 2, wherein: The first avoidance position is provided on the outer side of the support ring away from the air inlet; The first avoidance position is an avoidance gap formed on the outer side of the upper end surface of the support ring.

4. The scroll compressor according to claim 3, wherein: The support ring is in a circular ring shape, and the avoidance gap extends in an arc shape along the circumference of the support ring.

5. The scroll compressor according to claim 4, wherein: The angle between the two ends of the avoidance gap in the extending direction and the connecting line of the center of the support ring is α, which satisfies: 5°<α<170°.

6. The scroll compressor according to claim 3, wherein: The avoidance notch extends axially to the bottom surface of the back pressure cavity.

7. The scroll compressor according to any one of claims 2 to 6, wherein: The second avoidance position is provided on the inner side of the support ring away from the air inlet; The second avoidance position is formed by the inner side wall of the support ring expanding outward in a direction away from the center of the support ring.

8. The scroll compressor according to claim 7, wherein: The inner circumferential wall of the support ring includes a first arc segment and a second arc segment connected in the circumferential direction. The second arc segment is located on the side of the first arc segment away from the air intake. The radius of the second arc segment is greater than the radius of the first arc segment to form the second avoidance position.

9. The scroll compressor according to claim 8, wherein: The angle β corresponding to the second arc segment satisfies 5°<β<170°.

10. The scroll compressor according to any one of claims 1 to 6, wherein: The avoidance position extends along the circumference of the support ring. In a projection on the cross section of the support ring, the avoidance position is arranged in axisymmetry with respect to a center line of the air intake.

11. The scroll compressor according to any one of claims 1 to 6, wherein: The scroll compressor also includes a cross ring, and the main frame is provided with two first keyways for cooperating with the cross ring. The two first keyways are located outside the radial sides of the support ring, and the avoidance position is located on the side of the diameter where the center lines of the two first keyways are located away from the suction port.

12. The scroll compressor according to any one of claims 2 to 6, wherein: The scroll compressor further includes a sealing assembly. The upper end surface of the support ring is provided with a sealing groove. The sealing assembly is installed in the sealing groove and abuts against the end plate to seal and separate the assembly cavity and the back pressure cavity.

13. The scroll compressor according to claim 12, wherein: The circumferential shape of the sealing groove is consistent with the circumferential shape of the inner wall of the support ring.

14. A refrigeration device, characterized in that: It comprises the scroll compressor according to any one of claims 1 to 13.

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