CN117489588A

CN117489588A - Movable scroll, scroll compressor and refrigeration equipment

Info

Publication number: CN117489588A
Application number: CN202311630433.0A
Authority: CN
Inventors: 张跃; 律刚; 陈允彬; 张康
Original assignee: Guangdong Midea Environmental Technologies Co Ltd
Current assignee: Guangdong Midea Environmental Technologies Co Ltd
Priority date: 2023-11-30
Filing date: 2023-11-30
Publication date: 2024-02-02

Abstract

The invention discloses an orbiting scroll, a scroll compressor and refrigeration equipment. The movable vortex plate comprises a movable vortex tooth and a movable plate end plate, the movable plate end plate is provided with a first end face and a second end face which are respectively arranged at two axial ends, the movable vortex tooth is arranged on the first end face, and a buffer area is arranged at the edge of the second end face and used for deforming when the movable plate end plate is stressed. According to the technical scheme, the abrasion of the contact end surface of the movable vortex plate and the fixed vortex plate can be reduced, the abrasion resistance of the vortex end surface is improved, and the service life is prolonged.

Description

Movable scroll, scroll compressor and refrigeration equipment

Technical Field

The invention relates to the technical field of compressors, in particular to an movable scroll, a scroll compressor and refrigeration equipment.

Background

The scroll compressor comprises a fixed scroll, an movable scroll and a crankshaft, wherein the movable scroll is arranged on the crankshaft, the movable scroll is assembled with the fixed scroll in a matched manner and is movable relative to the fixed scroll, and when the scroll compressor works, the crankshaft moves eccentrically to drive the movable scroll to move, so that refrigerant can continuously run in a compression cavity defined by the fixed scroll and the movable scroll in a matched manner, and the processes of air suction, compression and exhaust of the compressor are realized.

In the operation process of the scroll compressor, the condition that local contact stress of the movable scroll and the fixed scroll is concentrated easily exists, so that the contact end face of the movable scroll and the fixed scroll is worn greatly.

Disclosure of Invention

The invention mainly aims to provide an movable scroll, which aims to improve the abrasion of the contact end surface of the movable scroll and a fixed scroll and improve the abrasion resistance of the end surface of the scroll.

In order to achieve the above object, the present invention provides an orbiting scroll comprising:

an orbiting scroll wrap; and

the movable disc end plate is provided with a first end face and a second end face which are respectively arranged at two axial ends, the movable vortex teeth are arranged on the first end face, and the edge of the second end face is provided with a buffer area for deformation when the movable disc end plate is stressed.

In an embodiment of the present application, the buffer area extends in an arc shape along the periphery of the second end surface, and the radian of the buffer area is not less than 90 °.

In an embodiment of the present application, the buffer area is disposed annularly around the periphery of the second end surface.

In an embodiment of the present application, an area of the second end surface except the buffer area is defined as a non-buffer area, and in a thickness direction of the movable disc end plate, a thickness of the movable disc end plate at the buffer area is smaller than a thickness of the movable disc end plate at the non-buffer area.

In an embodiment of the present application, the buffer area is formed by an edge-disposed groove of the second end surface.

In an embodiment of the present application, the groove penetrates through the outer peripheral wall of the movable disc end plate; or the groove is spaced from the peripheral wall of the movable disc end plate.

In an embodiment of the present application, a cross section perpendicular to the second end surface is defined as a longitudinal section, and a longitudinal section shape of the groove is rectangular, trapezoidal or triangular.

In an embodiment of the present application, a thickness H2 of the movable disc end plate at the buffer area and a thickness H1 at the non-buffer area are defined, where: 0.3H1 is less than or equal to H2 and is less than or equal to 0.7H1.

In an embodiment of the present application, the second end face is provided with a mating region for abutting and mating with a main frame of the scroll compressor, the buffer region is located outside the mating region, and the mating region is provided with an eccentric bearing portion.

In an embodiment of the present application, the second end surface is provided with two keyways for matching with the cross slip ring, and the two keyways are symmetrically distributed on two sides of the edge of the second end surface; the buffer area is located between two of the keyways.

In an embodiment of the present application, the buffer area includes two sub buffer areas, and the two sub buffer areas are symmetrically distributed between the two keyways.

In order to achieve the above purpose, the present application further provides a scroll compressor, including a fixed scroll and the above movable scroll, wherein an end surface of the fixed scroll is in abutting fit with the first end surface, and a fixed scroll tooth of the fixed scroll is in meshing connection with the movable scroll tooth; the movable scroll comprises:

an orbiting scroll wrap; and

In order to achieve the above object, the present application further provides a refrigeration apparatus including the above scroll compressor.

According to the technical scheme, in the movable scroll, the movable disk end plate is provided with the first end face and the second end face which are respectively arranged at the two axial ends, the movable scroll teeth are arranged on the first end face, and the buffer area used for deforming when the movable disk end plate is stressed is arranged on the edge of the second end face, so that when the movable disk end plate is inclined, the buffer area can deform to buffer the movable disk end plate to be subjected to stress impact of the fixed scroll, meanwhile, the effective contact area between the first end face of the movable disk end plate and the end face of the fixed scroll can be increased, the surface pressure is reduced, the abrasion of the contact end face of the movable scroll and the fixed scroll can be reduced, the abrasion resistance of the scroll end face is improved, and the service life is prolonged.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to the structures shown in these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic view of an embodiment of an orbiting scroll of the present invention;

FIG. 2 is a cross-sectional view of the embodiment of FIG. 1;

FIG. 3 is a schematic view of another embodiment of an orbiting scroll of the present invention;

FIG. 4 is a cross-sectional view of the embodiment of FIG. 3;

FIG. 5 is a schematic view of an alternate embodiment of an orbiting scroll of the present invention;

FIG. 6 is a cross-sectional view of the embodiment of FIG. 5;

FIG. 7 is a schematic view of an alternate embodiment of an orbiting scroll of the present invention.

Reference numerals illustrate:

reference numerals	Name of the name	Reference numerals	Name of the name
				100	Movable vortex plate	122a	Buffer area
110	Movable vortex tooth	122b	Mating region
				120	Movable plate end plate	1221	Key groove
121	First end surface	130	Eccentric bearing part
				122	Second end face

The achievement of the objects, functional features and advantages of the present invention will be further described with reference to the accompanying drawings, in conjunction with the embodiments.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

It should be noted that, if directional indications (such as up, down, left, right, front, and rear … …) are included in the embodiments of the present invention, the directional indications are merely used to explain the relative positional relationship, movement conditions, etc. between the components in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are correspondingly changed.

Meanwhile, the meaning of "and/or" and/or "appearing throughout the text is to include three schemes, taking" a and/or B "as an example, including a scheme, or B scheme, or a scheme that a and B satisfy simultaneously.

In addition, if there is a description of "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.

The invention provides an orbiting scroll 100, which aims to improve the abrasion of the contact end surface of an orbiting scroll and a fixed scroll and improve the abrasion resistance of the end surface of the scroll by arranging a buffer area 122a on one side edge of an orbiting disk end plate 120 of the orbiting scroll 100, which is away from an orbiting scroll 110, so that the edge of the orbiting disk end plate 120 plays a role of buffering deformation when receiving the pressure of the fixed scroll, the effective contact area between the orbiting scroll and the fixed scroll is increased, and the surface pressure is reduced.

In the embodiment of the present invention, as shown in fig. 1 and 2, the orbiting scroll 100 includes an orbiting scroll wrap 110 and an orbiting scroll end plate 120, the orbiting scroll end plate 120 has a first end surface 121 and a second end surface 122 which are disposed at both axial ends, the orbiting scroll wrap 110 is disposed at the first end surface 121, and a buffer area 122a is provided at the edge of the second end surface 122 for deformation when the orbiting scroll end plate 120 is stressed.

It can be understood that in the scroll compressor, the movable scroll 100 is connected with the fixed scroll in a matched manner, the movable scroll teeth 110 and the fixed scroll teeth of the movable scroll 100 form a plurality of crescent compression cavities, the first end surface 121 of the movable scroll end plate 120 is in abutting fit and sealing with the end surface of the fixed scroll, and the size of the compression cavities is changed by moving the movable scroll 100 relative to the fixed scroll, so that the functions of air suction, compression and air discharge are realized. Because the one end that moves the dish end plate 120 deviates from moving vortex tooth 110 is connected with scroll compressor's bent axle through eccentric bearing portion 130, move the dish end plate 120 and deviate from the supporting force that moves the main frame of vortex tooth 110 and can receive bent axle and compressor, move vortex tooth 110 simultaneously and can receive the pressure of compressing intracavity gas for move vortex dish 100 and can receive the pressure that is in different axial position, lead to moving vortex dish 100 and can take place the slope trend and even be in the slight inclined state in the operation in-process, and then can lead to moving dish end plate 120 outer fringe one side towards quiet vortex dish perk, just so can cause the contact stress of the position that moves dish end plate 120 perk and quiet vortex dish department too concentrated, the face is pressed too big, lead to wearing and tearing increase. Based on this, in this embodiment, by providing the buffer area 122a at the edge of the second end surface 122 of the movable disc end plate 120, when the movable disc end plate 120 is inclined, the buffer area 122a can deform when the movable disc end plate 120 receives the holding force of the fixed scroll, so as to buffer the movable disc end plate 120 from the stress impact of the fixed scroll, and meanwhile, the deformed first end surface 121 of the movable disc end plate 120 can be more attached to the end surface of the fixed scroll, the effective contact area between the first end surface and the second end surface is increased, the surface pressure is reduced, and therefore the abrasion of the contact end surface of the movable scroll 100 and the fixed scroll can be reduced.

It should be noted that, in the present embodiment, the buffer area 122a plays a role in reducing rigidity, and the buffer area 122a is not limited to a specific position of the edge of the second end surface 122, and since the contact portion between the edge of the first end surface 121 and the end surface of the fixed scroll is changed during operation of the movable disk end plate 120, in practical application, if the edge of the second end surface 122 has the buffer area 122a, the abrasion of the contact end surface between the first end surface 121 and the fixed scroll is reduced compared with the movable disk end plate 120 without the buffer area 122a. It is understood that the buffer region 122a may be disposed at the edge of the second end surface 122, or the buffer region 122a may be disposed near the edge of the second end surface 122. Of course, in practical application, the buffer areas 122a may be disposed on the peripheral edges of the second end faces 122, or the buffer areas 122a may be disposed on a partial area of the peripheral edges of the second end faces 122. The specific location and distribution of the buffer area 122a may not be limited herein. In practical applications, the buffer area 122a may be formed by reducing the thickness of the movable disk end plate 120, by changing the structural material thereof, or the like.

Further, by providing the buffer region 122a on the second end surface 122, the seal engagement effect between the first end surface 121 and the fixed scroll end surface is not affected.

As an example, the following table is aimed at performing an end-face contact stress simulation test on the movable-disc end plate 120 in this embodiment under the same high-pressure ratio working condition, so that the end-face contact stress of the movable-disc end plate without the buffer region 122a is compared with the end-face contact stress of the movable-disc end plate 120 with the buffer region 122a, and the maximum end-face contact stress of the movable-disc end plate is 123MPa, and after the buffer region 122a is designed, the maximum end-face contact stress of the movable-disc end plate 120 is 26MPa, which is reduced by 76%, and the effect is very obvious.

Therefore, the technical scheme of the invention can greatly reduce the end surface contact stress of the movable disc end plate 120 and the fixed vortex disc, thereby effectively improving the abrasion between the end surfaces.

In the orbiting scroll 100 of the present invention, the orbiting scroll end plate 120 has a first end surface 121 and a second end surface 122 respectively disposed at two axial ends, the first end surface 121 is provided with the orbiting scroll 110, and the edge of the second end surface 122 has a buffer area 122a for deforming when the orbiting scroll end 120 is stressed, so that when the orbiting scroll end plate 120 is inclined, the buffer area 122a can deform to buffer the orbiting scroll end plate 120 from the stress impact of the fixed scroll, and meanwhile, the effective contact area between the first end surface 121 of the orbiting scroll end plate 120 and the end surface of the fixed scroll can be increased, the surface pressure can be reduced, the abrasion of the contact end surface of the orbiting scroll 100 and the fixed scroll can be reduced, the abrasion resistance of the end surface of the fixed scroll can be improved, and the service life can be prolonged.

In an embodiment of the present application, referring to fig. 1 to 7, other areas of the second end surface 122 except for the buffer area 122a are defined as non-buffer areas, and in the thickness direction of the movable disc end plate 120, the thickness of the movable disc end plate 120 at the buffer area 122a is smaller than the thickness at the non-buffer area.

In the present embodiment, by setting the thickness at the buffer region 122a to be smaller than the thickness at the non-buffer region of the movable-disc end plate 120, the rigidity at the buffer region 122a can be reduced, so that the flexibility of the edge portion of the movable-disc end plate 120 is increased, and thus the edge portion of the movable-disc end plate 120 can be better brought into contact with the fixed-disc when the movable-disc 100 is tilted, reducing the face pressure.

Further, in one embodiment, as shown in fig. 2, the thickness of the movable disc end plate 120 at the buffer area 122a is defined as H2, the thickness at the non-buffer area is defined as H1, and the thickness at the buffer area 122a is defined as H2, which satisfies the following conditions: 0.3H1 is less than or equal to H2 and is less than or equal to 0.7H1.

It can be understood that the thickness of the movable disc end plate 120 at the buffer area 122a is reduced, and the first end surface 121 corresponding to the buffer area 122a still needs to bear the supporting force of the fixed scroll, so that the thickness H2 at the buffer area 122a should not be too large or too small, and if too large, the rigidity at the buffer area 122a is large, and the function of stress deformation buffer is not performed; if too small, the structural strength at the buffer area 122a is low, and the buffer area is easily pressed by the fixed scroll to generate large deformation, so that the fit sealing between the first end surface 121 and the fixed scroll is easily affected. Based on this, in this embodiment, the relation between the thickness H2 of the movable disc end plate 120 at the buffer area 122a and the thickness H1 of the non-buffer area of the movable disc end plate 120 satisfies 0.3H1 +.h2+. 0.7H1, and this arrangement can not only ensure the structural strength at the buffer area 122a, but also reduce the wear of the contact end surfaces between the movable scroll 100 and the fixed scroll.

As an example, the ratio relationship of H2 to H1 may be according to the actual situation, for example, may be 0.3, 0.4, 0.5, 0.6, or 0.7, etc.

In practical application, the buffer area 122a may be formed by forming a groove on the second end surface 122, or may be formed by directly molding through a mold design, so long as the thickness of the movable disc end plate 120 at the buffer area 122a can be reduced.

As an example, referring to fig. 1 to 7, the buffer area 122a is formed by providing a groove at the edge of the second end surface 122.

In this embodiment, the buffer area 122a can be formed by providing the groove at the edge of the second end surface 122, and no additional special buffer structure is required, so that the overall structure of the orbiting scroll 100 can be simplified.

In practical application, the setting position and the structural shape of the groove can be determined according to practical conditions, and the groove can only play a role in buffering deformation. For example, a groove may be provided at the edge of the second end face 122, in which case the groove may extend directly through the outer peripheral wall of the rotor end plate 120. Or the groove may be disposed at a position of the second end face 122 near the edge, where a certain distance is formed between the groove and the peripheral wall of the movable disc end plate 120, so that the deformation can still be buffered.

As an example, in consideration of the difficulty of the manufacturing process, the production efficiency, and the like, the groove in the present embodiment penetrates the outer peripheral wall of the movable disc end plate 122, simplifying the process, and improving the production efficiency.

In an embodiment of the present application, when the buffer area 122a is formed by providing the second end surface 122 with a groove, the structural shape of the buffer area 122a may be adjusted by changing the shape of the longitudinal section of the groove, where the longitudinal section is a section perpendicular to the second end surface 122.

As an example, as shown in fig. 1, 2 and 7, the longitudinal cross-sectional shape of the groove is rectangular, and the buffer area 122a is formed in a rectangular stepped structure of the edge of the second end surface 122.

As an example, as shown in fig. 3 and 4, the longitudinal section shape of the groove is a trapezoid, and the buffer area 122a is formed in a trapezoid step structure of the edge of the second end surface 122.

As an example, as shown in fig. 5 and 6, the longitudinal section shape of the groove is triangular, and the buffer area 122a is formed in a triangular stepped structure of the edge of the second end face 122. Alternatively, the second end face 122 may be formed by chamfering.

In practical use, the longitudinal cross-sectional shape of the groove is not limited to the above embodiments, but may be other shapes such as a semicircle, a polygon, or other irregular shapes, etc.

In practical applications, the buffer area 122a may be distributed in a ring shape around the periphery of the second end face 122, or may be disposed at a portion of the periphery of the second end face 122, or may be a scattered structure intermittently disposed at the periphery of the second end face 122, or the like.

In an embodiment of the present application, as shown in fig. 1, 3, 5 and 7, the buffer area 122a extends along the periphery of the second end surface 122 in an arc shape, and the arc of the buffer area 122a is not less than 90 °.

In this embodiment, the buffer area 122a extends in an arc shape along the periphery of the second end surface 122, and the arc is not less than 90 °, so that when the orbiting scroll 100 tilts during operation, the portion of the first end surface 121 corresponding to the buffer area 122a can be deformed in contact with the end surface of the fixed scroll to a greater extent, so as to prevent stress concentration and reduce wear.

In practical application, in the process of rotating the movable scroll 100, the contact stress between the position of the first end surface 121 of the movable scroll end plate 120, which is close to the air suction port, and the fixed scroll is higher than that of other positions, so that the buffer area 122a can be arranged in the area where the air suction port is swept in the movement cycle of the movable scroll end plate 120, and the contact stress between the two scrolls can be reduced more effectively, and the abrasion is reduced.

Further, in an embodiment, the buffer area 122a is disposed annularly around the periphery of the second end surface 122.

In this embodiment, the buffer area 122a is annularly disposed around the periphery of the second end surface 122, so that the portion of the movable scroll 100 abutting against the fixed scroll can be deformed and buffered no matter where the movable scroll is inclined, the effective contact area between the movable scroll end plate 120 and the fixed scroll is further increased, local stress concentration is prevented, and better abrasion reduction effect is achieved.

In an embodiment of the present application, as shown in fig. 1 to 7, the second end surface 122 is provided with a fitting region 122b for abutting and fitting with a main frame of the scroll compressor, the buffer region 122a is located outside the fitting region 122b, and the fitting region 122b is provided with an eccentric bearing portion 130.

As can be appreciated, in the scroll compressor, the movable scroll 100 is mounted on the main frame, and the mating region 122b is in abutting engagement with the thrust surface of the main frame, so as to support the movable scroll 100. The eccentric bearing 130 is connected to the crankshaft, and drives the orbiting scroll 100 to translate by the rotation of the crankshaft.

In this embodiment, the buffer area 122a is disposed outside the mating area 122b, so that the buffer area 122a is prevented from affecting the supporting connection between the main frame and the orbiting scroll 100, and the stability of the orbiting scroll 100 during operation is ensured.

In an embodiment of the present application, referring to fig. 1, 3, 5 and 7, the second end surface 122 is provided with two keyways 1221 for matching with the cross slip ring, and the two keyways 1221 are symmetrically distributed on two sides of the edge of the second end surface 122; the buffer area 122a is located between two keyways 1221.

It can be understood that, in order to prevent the orbiting scroll 100 from rotating during the operation of the scroll compressor, an oldham ring structure is disposed between the main frame and the orbiting scroll 100 to limit the orbiting scroll 100 from rotating, in this embodiment, the second end surface 122 is provided with two symmetrically disposed keyways 1221, and two limit keys on the oldham ring are respectively engaged with the two keyways 1221 to realize a limit function on the orbiting scroll 100.

In this embodiment, the buffer area 122a is disposed between the two keyways 1221, so that the height of the limiting step between the keyways 1221 and the second end face 122 is ensured, the buffer area 122a with a smaller thickness is prevented from weakening the limiting effect between the keyways 1221 and the cross slip ring, and the operation reliability of the movable scroll 100 is further improved.

In one embodiment, the buffer area 122a includes two sub-buffer areas 122a1, and the two sub-buffer areas 122a1 are symmetrically distributed between the two keyways 1221.

By arranging the two sub buffer areas 122a1 symmetrically between the two keyways 1221, the limit strength of the movable scroll 100 and the cross slip ring can be ensured, and the wear resistance of the scroll end face of the movable disk end plate 120 can be increased.

Of course, in some other embodiments, as shown in fig. 1, 3 and 5, the buffer area 122a surrounds the periphery of the second end surface 122, and the buffer area 122a passes through the two keyways 1221, in this way, the structural design of the orbiting scroll 100 can be simplified, and the process difficulty of the buffer area 122a can be reduced.

The invention also provides a scroll compressor which comprises a fixed scroll and an movable scroll, wherein the specific structure of the movable scroll refers to the embodiment, and as the scroll compressor adopts all the technical schemes of all the embodiments, the scroll compressor at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted herein. The end surface of the fixed scroll is in abutting fit with the first end surface 121, and the fixed scroll teeth of the fixed scroll are in meshed connection with the movable scroll teeth 110 to define a compression cavity.

The invention also provides a refrigeration device which comprises a scroll compressor, wherein the specific structure of the scroll compressor refers to the embodiment, and as the refrigeration device adopts all the technical schemes of all the embodiments, the refrigeration device at least has all the beneficial effects brought by the technical schemes of the embodiments, and the description is omitted.

Alternatively, the refrigeration device includes an air conditioner, a refrigerator, or a cold chain transporter, or the like.

The foregoing description of the preferred embodiments of the present invention should not be construed as limiting the scope of the invention, but rather should be understood to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the following description and drawings or any application directly or indirectly to other relevant art(s).

Claims

1. An orbiting scroll, comprising:

an orbiting scroll wrap; and

2. The orbiting scroll of claim 1 wherein said cushioning region extends in an arc along the periphery of said second end surface, said cushioning region having an arc of not less than 90 °.

3. The orbiting scroll of claim 2 wherein said cushioning region is annularly disposed about the periphery of said second end surface.

4. A orbiting scroll as claimed in any one of claims 1 to 3, wherein a region of said second end surface other than said cushioning region is defined as a non-cushioning region, and wherein said orbiting scroll end plate has a thickness at said cushioning region which is smaller than a thickness at said non-cushioning region in a thickness direction of said orbiting scroll end plate.

5. The orbiting scroll of claim 4 wherein said cushioning region is formed by an edge-disposed recess in said second end surface.

6. The orbiting scroll of claim 5 wherein said recess extends through the peripheral wall of said orbiting scroll end plate; or the groove is spaced from the peripheral wall of the movable disc end plate.

7. The orbiting scroll of claim 5 wherein a longitudinal section is defined perpendicular to said second end surface, said recess having a rectangular, trapezoidal or triangular longitudinal section.

8. The orbiting scroll of claim 4 wherein said orbiting scroll end plate is defined by a thickness H2 at said cushioning region and a thickness H1 at said non-cushioning region, satisfying: 0.3H1 is less than or equal to H2 and is less than or equal to 0.7H1.

9. A orbiting scroll as claimed in any one of claims 1 to 3, wherein the second end surface is provided with a mating region for abutting engagement with a main frame of the scroll compressor, the buffer region being located outboard of the mating region, the mating region being provided with an eccentric bearing portion.

10. The orbiting scroll of claim 1 wherein said second end surface is provided with two keyways for mating with a cross slip ring, said keyways being symmetrically disposed on either side of the edge of said second end surface; the buffer area is located between two of the keyways.

11. The orbiting scroll of claim 10 wherein said cushioning region includes two sub-cushioning regions, said sub-cushioning regions being symmetrically disposed between said keyways.

12. A scroll compressor comprising a fixed scroll and an orbiting scroll as claimed in any one of claims 1 to 11, wherein an end face of the fixed scroll is in abutting engagement with the first end face, and a fixed scroll wrap of the fixed scroll is in meshing engagement with the orbiting scroll wrap.

13. A refrigeration apparatus comprising the scroll compressor of claim 12.