Scroll compression mechanism and scroll compressor comprising same

Abstract

The invention relates to a scroll compression mechanism and a scroll compressor. The scroll compression mechanism comprises a fixed scroll, a movable scroll, a pre-exhaust channel and an auxiliary exhaust channel. The fixed vortex comprises a fixed vortex end plate, a fixed vortex scroll and an exhaust port. The orbiting scroll includes an orbiting scroll end plate and an orbiting scroll wrap. A central compression cavity directly communicated with the exhaust port and a first compression cavity and a second compression cavity which are adjacent to the central compression cavity are formed between the fixed vortex scroll and the movable vortex scroll. And first and second meshing parts are respectively arranged between the central compression cavity and the first and second compression cavities. The first and second engagement portions are disengaged when moved to a radially innermost position to enter a main exhaust process. The pre-exhaust passage is configured to communicate the central compression chamber with the first compression chamber to perform a pre-exhaust process before a main exhaust process begins. The auxiliary exhaust passage is configured to assist in flowing the compressed fluid from the pre-exhaust passage to the exhaust port.

Description

Technical Field

[0001] The present invention relates to the technical field of scroll compressors, and in particular to a scroll compression mechanism and a scroll compressor comprising the scroll compression mechanism. Background Art

[0002] This section provides background information related to the present disclosure which is not necessarily prior art.

[0003] The scroll compressor includes a scroll compression mechanism having a fixed scroll and a movable scroll. The scrolls of the fixed scroll and the movable scroll are engaged with each other to define a series of chambers. Some scroll compressors include an exhaust process and a pre-exhaust process. Figures 1 to 2C To describe the structure and operation process of the scroll compression mechanism of the scroll compressor.

[0004] Figure 1 FIG. 2 is a schematic longitudinal section diagram of the scroll compression mechanism 1. Figure 1 As shown, the scroll compression mechanism 1 includes a fixed scroll 2 and a movable scroll 3. The fixed scroll 2 includes a fixed scroll end plate 2a, a first side ( Figure 1 The movable scroll 3 includes a spiral fixed scroll wrap 2b extending from the fixed scroll end plate 2a (the lower side in the figure) and an exhaust port 2c for discharging compressed fluid provided in the fixed scroll end plate 2a. The movable scroll 3 includes a movable scroll end plate 3a, a first side ( Figure 1 The spiral movable scroll wrap 3b extending from the movable scroll end plate 3a ( Figure 1 A hub portion 3c extending from the lower side (in the middle).

[0005] The hub 3c is used to receive a drive shaft (not shown) and be driven by the drive shaft. Driven by the drive shaft, the movable scroll 3 revolves relative to the fixed scroll 2 (that is, the movable scroll does not rotate around its own central axis, but the central axis of the movable scroll rotates around the central axis of the fixed scroll) to compress the working fluid (for example, refrigerant).

[0006] The fixed scroll wrap 2b and the movable scroll wrap 3b are engaged with each other to form a plurality of compression chambers therebetween, including a central compression chamber C0 directly connected to the exhaust port 2c and a first compression chamber C1 and a second compression chamber C2 respectively adjacent to the central compression chamber C0. A pre-exhaust passage 3d for connecting the central compression chamber C0 with the first compression chamber C1 is also provided on the movable scroll end plate 3a.

[0007] FIG. 2A to FIG. 2C It is a schematic diagram showing the operation process of the scroll compression mechanism 1. FIG. 2A to FIG. 2C 3 is a schematic cross-sectional view of the compression mechanism 1 viewed toward the movable scroll end plate 3 a. Figure 2A It shows that the first compression chamber C1 is sealed relative to the central compression chamber C0 and does not enter the exhaust process; Figure 2B It shows that the first compression chamber C1 is about to enter the pre-exhaust process; Figure 2C The pre-exhaust process of the first compression chamber C1 via the pre-exhaust passage 3d is shown.

[0008] See also FIG. 2A to FIG. 2C The fixed scroll wrap 2b and the movable scroll wrap 3b have a first meshing portion P1 between the central compression chamber C0 and the first compression chamber C1, and a second meshing portion P2 between the central compression chamber C0 and the second compression chamber C2. The central compression chamber C0 is defined between the first meshing portion P1 and the second meshing portion P2. Figure 2A In the embodiment, the pre-exhaust passage 3d is completely within the range of the central compression chamber C0 and is located radially inward of the scroll profile relative to the first meshing portion P1. At this time, the central compression chamber C0 and the first compression chamber C1 are sealed and isolated by the first meshing portion P1. When the scroll compression mechanism 1 runs to Figure 2B In the state shown, the first meshing portion P1 moves radially inward along the scroll profile. At this time, the pre-exhaust channel 3d is blocked by the fixed scroll 2b and is about to be exposed, and the central compression chamber C0 is still sealed relative to the first compression chamber C1. When the scroll compression mechanism 1 further runs to Figure 2C In the state shown, the pre-exhaust channel 3d is gradually exposed from the fixed scroll 2b until the first meshing portion P1 moves to the radially innermost position, and the first compression chamber C1 is connected to the central compression chamber C0 via the exposed pre-exhaust channel 3d, so that the fluid in the first compression chamber C1 can be discharged in advance, that is, entering the pre-exhaust process.

[0009] Then, the first meshing portion P1 and the second meshing portion P2 are disengaged when they move to the radially innermost position (not shown), so that the central compression chamber C0, the first compression chamber C1 and the second compression chamber C2 merge to form a new central compression chamber. Figure 2A The status shown. Figure 2A As shown, at this time, the new central compression chamber C0 is a fusion of the previous central compression chamber and its two adjacent compression chambers. There are two new adjacent compression chambers C1 and C2 on both sides of the new central compression chamber C0. The meshing parts P1 and P2 between the new central compression chamber C0 and the two adjacent compression chambers C1 and C2 are now at the radially outermost position. As the meshing parts move radially inward along the scroll profile, the volume of the new central compression chamber C0 gradually decreases, and the fluid therein is discharged through the exhaust port 2c, that is, the main exhaust process is carried out. The movable scroll 3 reciprocates relative to the fixed scroll 2 in this way, thereby continuously compressing the fluid. Summary of the invention

[0010] Technical issues

[0011] In the scroll compression mechanism 1 described above, when the pre-exhaust passage 3d begins to be exposed for pre-exhaust (see Figure 2C ), the obstruction of the fixed scroll vortex makes the flow channel narrow, the flow area is very limited, the flow loss increases, and the performance of the scroll compressor is reduced.

[0012] In view of the above problems, the present application proposes a scroll compression mechanism capable of improving pre-exhaust efficiency and a scroll compressor including the scroll compression mechanism.

[0013] Technical Solution

[0014] According to one aspect of the present disclosure, a scroll compression mechanism is provided. The scroll compression mechanism includes: a fixed scroll, the fixed scroll including a fixed scroll end plate, a spiral fixed scroll wrap extending from a first side of the fixed scroll end plate, and an exhaust port provided in the fixed scroll end plate for discharging compressed fluid; and a movable scroll, the movable scroll including a movable scroll end plate and a spiral movable scroll wrap extending from a first side of the movable scroll end plate. The fixed scroll wrap and the movable scroll wrap are engaged with each other to form a plurality of compression chambers for compressing fluid therebetween, the plurality of compression chambers including a central compression chamber directly connected to the exhaust port and a first compression chamber and a second compression chamber respectively adjacent to the central compression chamber. The fixed scroll wrap and the movable scroll wrap have a first meshing portion between the central compression chamber and the first compression chamber and a second meshing portion between the central compression chamber and the second compression chamber, and when the movable scroll revolves relative to the fixed scroll, the first meshing portion and the second meshing portion move from the radial outer side to the radial inner side. The first meshing portion and the second meshing portion are disengaged when moving to the radially innermost position to enter a main exhaust process of exhausting the compressed fluid through the exhaust port. The scroll compression mechanism further includes: a pre-exhaust passage configured to connect the central compression chamber with the first compression chamber to perform a pre-exhaust process before the main exhaust process begins; and an auxiliary exhaust passage configured to assist the compressed fluid to flow from the pre-exhaust passage to the exhaust port.

[0015] In some embodiments, the pre-exhaust passage is provided on the movable scroll end plate, in the form of a recessed portion recessed from the surface of the movable scroll end plate facing the fixed scroll. The recessed portion is configured such that, during the pre-exhaust process, the recessed portion is communicated with the central compression chamber, and at least a portion is exposed from the outer side of the fixed scroll wrap to the first compression chamber, so as to connect the central compression chamber with the first compression chamber.

[0016] In some embodiments, the auxiliary exhaust passage includes a first auxiliary exhaust passage disposed in the fixed scroll wrap. During the pre-exhaust process, the first auxiliary exhaust passage communicates with the pre-exhaust passage and the central compression chamber.

[0017] In some embodiments, the first auxiliary exhaust passage includes a first inlet located on an end surface of the fixed scroll wrap and a first outlet located on a side surface of the fixed scroll wrap. During the pre-exhaust process, the first inlet is communicated with the pre-exhaust passage, and the first outlet is communicated with the central compression chamber.

[0018] In some embodiments, the first auxiliary exhaust channel includes a first section connected to the first inlet and a second section connected to the first outlet, and the first section of the first auxiliary exhaust channel is in communication with the second section of the first auxiliary exhaust channel.

[0019] In some embodiments, the first section of the first auxiliary exhaust passage is a blind hole extending in the axial direction from the end surface of the fixed scroll wrap. The second section of the first auxiliary exhaust passage is a groove disposed on the inner side surface of the fixed scroll wrap and / or a groove disposed on the outer side surface of the fixed scroll wrap.

[0020] In some embodiments, the auxiliary exhaust passage includes a second auxiliary exhaust passage disposed in the movable scroll wrap. During the pre-exhaust process, the second auxiliary exhaust passage communicates with the central compression chamber and the exhaust port.

[0021] In some embodiments, the second auxiliary exhaust passage includes a second inlet located on a side of the movable scroll wrap and a second outlet located on an end surface of the movable scroll wrap. During the pre-exhaust process, the second inlet is communicated with the central compression chamber, and the second outlet is communicated with the exhaust port.

[0022] In some embodiments, the second auxiliary exhaust channel includes a first section connected to the second outlet and a second section connected to the second inlet, and the first section of the second auxiliary exhaust channel is in communication with the second section of the second auxiliary exhaust channel.

[0023] In some embodiments, the first section of the second auxiliary exhaust passage is a blind hole extending from the end surface of the movable scroll wrap in the axial direction. The second section of the second auxiliary exhaust passage is a groove provided on the inner side surface of the movable scroll wrap and / or a groove provided on the outer side surface of the movable scroll wrap.

[0024] In some embodiments, the second section of the second auxiliary exhaust passage includes a groove disposed on an inner side surface of the orbiting scroll wrap and / or a groove disposed on an outer side surface of the orbiting scroll wrap.

[0025] In some embodiments, the orbiting scroll further includes a hub portion extending from a second side of the orbiting scroll end plate opposite to the first side, the hub portion being configured to receive a drive shaft and be driven by the drive shaft.

[0026] In some embodiments, the exhaust port is a single exhaust port disposed substantially at the center of the fixed scroll end plate.

[0027] According to another aspect of the present disclosure, a scroll compressor including the scroll compression mechanism is provided.

[0028] Technical Effects

[0029] According to the scroll compression mechanism disclosed in the present invention, an auxiliary exhaust channel is provided in the scroll to reduce the blocking effect of the scroll on the pre-exhaust, reduce the flow loss of the fluid, increase the pre-exhaust rate of the fluid, improve the exhaust efficiency and improve the performance of the scroll compressor.

[0030] Further areas of applicability will become apparent from the description provided herein.It should be understood that the specific examples and implementations described in this section are for illustrative purposes only and are not intended to limit the scope of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] The features and advantages of one or more embodiments of the present disclosure will become more easily understood through the following description with reference to the accompanying drawings, in which:

[0032] Figure 1 It is a longitudinal cross-sectional schematic diagram of an existing scroll compression mechanism;

[0033] FIG. 2A to FIG. 2C A schematic diagram showing the operation process of an existing scroll compression mechanism;

[0034] Figure 3 is a schematic longitudinal section diagram of a scroll compression mechanism according to a first embodiment of the present disclosure;

[0035] Figure 4 for Figure 3 A schematic longitudinal section diagram of a fixed scroll of a scroll compression mechanism;

[0036] Figure 5 for Figure 3 A three-dimensional schematic diagram of a fixed scroll of a scroll compression mechanism;

[0037] Figure 6 for Figure 3Another three-dimensional schematic diagram of the fixed scroll of the scroll compression mechanism;

[0038] Figure 7 is a schematic longitudinal section diagram of a scroll compression mechanism according to a second embodiment of the present disclosure;

[0039] Figure 8 for Figure 7 A schematic top view of a scroll compression mechanism;

[0040] Fig. 9 for Figure 7 A schematic longitudinal section diagram of a movable scroll of a scroll compression mechanism;

[0041] Fig.10 for Figure 7 A schematic top view of a movable scroll of a scroll compression mechanism;

[0042] Fig.11 for Figure 7 A three-dimensional schematic diagram of a movable scroll of a scroll compression mechanism;

[0043] Fig.12 for Figure 7 Another three-dimensional schematic diagram of the movable scroll of the scroll compression mechanism; and

[0044] Fig.13 It is a schematic longitudinal sectional view of a scroll compression mechanism according to a third embodiment of the present disclosure. DETAILED DESCRIPTION

[0045] The exemplary embodiments of the present application will now be described more fully with reference to the accompanying drawings. It should be understood that in all of these drawings, the same reference numerals indicate similar or corresponding parts or features. In addition, the drawings are not necessarily drawn to actual scale, and some parts may be shown in an enlarged scale for the purpose of ease of explanation.

[0046] Exemplary embodiments are provided so that the present disclosure will be exhaustive and will more fully convey the scope to those skilled in the art. Many specific details such as examples of specific components, devices, and methods are set forth to provide a thorough understanding of the various embodiments of the present disclosure. It will be clear to those skilled in the art that specific details need not be employed, that the exemplary embodiments can be implemented in many different forms, and that they should not be construed as limiting the scope of the present disclosure. In some exemplary embodiments, well-known processes, well-known device structures, and well-known technologies are not described in detail.

[0047] See below for more information. Figures 3 to 6 A scroll compression mechanism 100 according to a first embodiment of the present disclosure will be described.

[0048] See also Figure 3The scroll compression mechanism 100 includes a fixed scroll 110 and a movable scroll 120. The movable scroll 120 is engaged with the fixed scroll 110 and can revolve relative to the fixed scroll 110 (i.e., the movable scroll does not rotate around its own central axis, but the central axis of the movable scroll rotates around the central axis of the fixed scroll) to compress a fluid (e.g., a refrigerant).

[0049] The fixed scroll 110 includes a fixed scroll end plate 111, a fixed scroll wrap 112, and an exhaust port 113. The fixed scroll wrap 112 extends from a first side ( Figure 3 The exhaust port 113 is configured to discharge the compressed fluid out of the scroll compression mechanism 100.

[0050] The movable scroll 120 includes a movable scroll end plate 121, a movable scroll wrap 122, and a hub 123. The movable scroll wrap 122 extends from a first side ( Figure 3 The hub 123 extends from the second side (upper side) of the movable scroll end plate 121 and meshes with the fixed scroll wrap 112 to form a series of compression chambers therebetween. Figure 3 When the drive shaft drives the hub 123, the movable scroll 120 revolves relative to the fixed scroll 110, and the compression chamber moves from the radial outer side to the radial inner side, while the volume gradually decreases to compress the fluid. As the compression chamber moves, the fluid in the compression chamber will be compressed as shown in FIG. Figure 2C The operation of the scroll compression mechanism 100 is similar to that of the reference Figures 1 to 2C The operation process of the scroll compression mechanism 1 is described, so it is not repeated here.

[0051] exist Figure 3 In the example shown, the single exhaust port 113 is located substantially at the center of the fixed scroll end plate 111. The series of compression chambers include: a central compression chamber C0 directly connected to the single exhaust port 113; and a first compression chamber C1 adjacent to the central compression chamber C0.

[0052] The scroll compression mechanism 100 further includes a pre-exhaust passage 124 for connecting the central compression chamber C0 with the first compression chamber C1. Figure 3 In the example shown, the pre-exhaust passage 124 is provided on the movable scroll end plate 121 and is a first side ( Figure 3 The upper side is the concave portion. Figure 2CDuring the pre-exhaust, the recess gradually emerges from the fixed scroll wrap 112 to connect the central compression chamber C0 with the first compression chamber C1. In other words, the recess is configured such that during the pre-exhaust, the recess communicates with the central compression chamber C0, and at least a portion of the recess is exposed from the outside of the fixed scroll wrap 112 to the first compression chamber C1 to connect the central compression chamber C0 with the first compression chamber C1.

[0053] The scroll compression mechanism 100 further includes a first auxiliary exhaust passage 116. The first auxiliary exhaust passage 116 is configured to assist the fluid in the first compression chamber C1 to flow to the exhaust port 113 via the pre-exhaust passage 124. The first auxiliary exhaust passage 116 may be disposed in the fixed scroll wrap 112. The first auxiliary exhaust passage 116 may be disposed adjacent to the inner end of the spiral fixed scroll wrap 112 or disposed at the inner end of the fixed scroll wrap 112.

[0054] like Figures 4 to 6 As shown, the first auxiliary exhaust passage 116 may include an inlet 115a located on the end surface of the fixed scroll 112 and an outlet 115b located on the side of the fixed scroll. The first auxiliary exhaust passage 116 may include a first section 116a connecting the inlet 115a (i.e., adjacent to the pre-exhaust passage 124) and a second section 116b connecting the outlet 115b (i.e., adjacent to the exhaust port 113). The first section 116a extends from the inlet 115a in an axial direction. For example, the first section 116a may be in the form of a blind hole. The first section 116a may have any suitable cross-sectional shape, size, quantity and / or position, as long as it can achieve the functions described herein.

[0055] The second section 116b extends from the first section 116a to the outlet 115b on the side of the fixed scroll wrap 112 and communicates with the first section 116a. For example, the second section 116b may be in the form of a groove. Figure 5 As shown, the second section 116b may include a groove 1161 disposed on the inner side of the fixed scroll wrap 112. Alternatively or additionally, as Figure 6 As shown, the second segment 116b may include a groove 1162 disposed on the outer side of the non-orbiting scroll wrap 112. The second segment 116b may have any suitable cross-sectional shape, size, number and / or position, as long as it can achieve the functions described herein.

[0056] When the pre-exhaust channel 124 is exposed from the fixed scroll 112, the compressed fluid in the first compression chamber C1 flows into the exposed portion of the pre-exhaust channel 124, but a part of the compressed fluid enters the first auxiliary exhaust channel 116 and flows into the central compression chamber C0 via the first auxiliary exhaust channel 116, while the other part of the compressed fluid flows completely into the central compression chamber C0 through the pre-exhaust channel 124. Obviously, the blocking effect of the fixed scroll 112 (especially the end face of the fixed scroll 112) on the pre-exhaust channel 124 can be reduced by the first auxiliary exhaust channel 116, so that the flow loss of the fluid can be reduced, thereby improving the exhaust efficiency and improving the performance of the scroll compressor. In addition, by providing the first auxiliary exhaust channel on the fixed scroll, the flow area can be increased, thereby increasing the fluid flow rate at the entrance of the pre-exhaust channel.

[0057] See below for more information. Figures 7 to 12 A scroll compression mechanism 200 according to a second embodiment of the present disclosure will be described. The scroll compression mechanism 200 is different from the scroll compression mechanism 100 in that the auxiliary exhaust passage is provided on the movable scroll wrap instead of the fixed scroll wrap.

[0058] See also Figure 7 The scroll compression mechanism 200 includes a fixed scroll 210 and a movable scroll 220. The movable scroll 220 includes a movable scroll end plate 221, a movable scroll wrap 222, a hub 223, and a pre-exhaust passage 224. The fixed scroll 210 includes a fixed scroll end plate 211, a fixed scroll wrap 212, and an exhaust port 213.

[0059] like Figure 7 and Figure 8 As shown, the scroll compression mechanism 200 further includes a second auxiliary exhaust passage 226. The second auxiliary exhaust passage 226 may be disposed in the orbiting scroll wrap 222. The second auxiliary exhaust passage 226 may be disposed adjacent to the inner end of the spiral orbiting scroll wrap 222 or disposed at the inner end of the fixed scroll wrap 222.

[0060] See also Figure 7 The second auxiliary exhaust passage 226 includes an inlet 225a located on the side of the movable scroll wrap 222 and an outlet 225b located on the end surface of the movable scroll wrap 222. Figures 9 to 12 As shown, the second auxiliary exhaust passage 226 may include a first section 226a connected to the outlet 225b (i.e., adjacent to the exhaust port 213) and a second section 226b connected to the inlet 225a (i.e., away from the exhaust port 213). The first section 226a may extend in the axial direction from the end surface of the movable scroll 222 facing the exhaust port 213. For example, the first section 226a may be as follows Fig. 9 and Fig.10The first section 226a may have any suitable cross-sectional shape, size, number and / or position, as long as it can achieve the functions described herein.

[0061] The second section 226b may be a groove disposed on the side of the movable scroll wrap 222 and connected to the blind hole. Fig.11 As shown, the second section 226b may include a groove 2261 disposed on the inner side surface of the orbiting scroll wrap 222. Alternatively or additionally, as Fig.12 As shown, the second segment 226b may include a groove 2262 disposed on the outer side of the orbiting scroll wrap 222. The second segment 226b may have any suitable cross-sectional shape, size, number and / or position as long as it can achieve the functions described herein.

[0062] The second auxiliary exhaust channel 226 may have a function similar to the first auxiliary exhaust channel 116 described above. The second auxiliary exhaust channel 226 may increase the flow area of ​​the fluid discharge, thereby increasing the fluid flow rate of the pre-exhaust channel. In addition, the second auxiliary exhaust channel may assist the main exhaust process. The second auxiliary exhaust channel 226 may also reduce the blocking effect of the movable scroll on the fluid discharged toward the exhaust port 113, thereby reducing the flow loss of the fluid, thereby improving the exhaust efficiency and improving the performance of the scroll compressor.

[0063] Fig.13 3 is a schematic longitudinal sectional view of a scroll compression mechanism 300 according to a third embodiment of the present disclosure. The scroll compression mechanism 300 is different from the scroll compression mechanisms 100 and 200 in that it includes both a first auxiliary exhaust passage 316 and a second auxiliary exhaust passage 326 .

[0064] See also Fig.13 The scroll compression mechanism 300 includes a fixed scroll 310 and a movable scroll 320. The movable scroll 320 includes a movable scroll end plate 321, a movable scroll wrap 322, a hub 323, a pre-exhaust passage 324, and a first auxiliary exhaust passage 316. The fixed scroll 310 includes a fixed scroll end plate 311, a fixed scroll wrap 312, an exhaust port 313, and a second auxiliary exhaust passage 326.

[0065] The first auxiliary exhaust passage 316 may be disposed in the fixed scroll wrap 312 of the fixed scroll 310, and the second auxiliary exhaust passage 326 may be disposed in the movable scroll wrap 322. Figures 3 to 6 The second auxiliary exhaust passage 326 may have a similar structure to the first auxiliary exhaust passage 116 shown in FIG. Figures 7 to 12 The first auxiliary exhaust channel 316 and the second auxiliary exhaust channel 326 are similar in structure to the second auxiliary exhaust channel 226 shown in FIG. Therefore, the first auxiliary exhaust channel 316 and the second auxiliary exhaust channel 326 will not be described in detail.

[0066] It should be understood that the description of the specific examples with reference to the accompanying drawings is for illustrative purposes only and does not limit the structure of the scroll compression mechanism of the present disclosure. The structure of the various parts of the scroll compression mechanism should not be limited to the specific examples shown in the drawings and described herein, but can be changed as long as it can achieve the functions described herein.

[0067] Although various embodiments of the present disclosure have been described in detail herein, it should be understood that the present disclosure is not limited to the specific embodiments described and illustrated herein, and other modifications and variations may be implemented by those skilled in the art without departing from the spirit and scope of the present disclosure. All such modifications and variations fall within the scope of the present invention. Moreover, all components, parts or features described herein may be replaced by other components, parts or features that are structurally and functionally equivalent.

Claims

1. A scroll compression mechanism (100; 200; 300), comprising: A fixed scroll (110; 210; 310), wherein the fixed scroll comprises a fixed scroll end plate (111; 211; 311), a spiral fixed scroll wrap (112; 212; 312) extending from a first side of the fixed scroll end plate and an exhaust port (113; 213; 313) provided in the fixed scroll end plate for exhausting compressed fluid; and A movable scroll (120; 220; 320), the movable scroll comprising a movable scroll end plate (121; 221; 321) and a spiral movable scroll wrap (122; 222; 322) extending from a first side of the movable scroll end plate, wherein the fixed scroll wrap and the movable scroll wrap are engaged with each other to form a plurality of compression chambers for compressing fluid therebetween, the plurality of compression chambers comprising a central compression chamber (C0) directly connected to the exhaust port and a first compression chamber (C1) and a second compression chamber (C2) respectively adjacent to the central compression chamber, The fixed scroll and the movable scroll have a first meshing portion (P1) between the central compression chamber and the first compression chamber and a second meshing portion (P2) between the central compression chamber and the second compression chamber, and when the movable scroll revolves relative to the fixed scroll, the first meshing portion and the second meshing portion move from the radial outer side to the radial inner side, The first meshing portion and the second meshing portion are disengaged when moving to the radially innermost position to enter a main exhaust process of exhausting the compressed fluid through the exhaust port, The scroll compression mechanism also includes: A pre-exhaust passage (114, 124; 214, 224; 314, 324), the pre-exhaust passage being configured to connect the central compression chamber with the first compression chamber to perform a pre-exhaust process before the main exhaust process begins; and An auxiliary exhaust passage (116; 226; 316, 326) is configured to assist the flow of compressed fluid from the pre-exhaust passage to the exhaust port.

2. The scroll compression mechanism according to claim 1, wherein: The pre-exhaust passage is arranged on the movable scroll end plate, and is in the form of a recessed portion recessed from the surface of the movable scroll end plate facing the fixed scroll; the recessed portion is configured so that, during the pre-exhaust process, the recessed portion is connected to the central compression chamber, and at least a portion of the recessed portion is exposed from the outside of the fixed scroll scroll to the first compression chamber to connect the central compression chamber with the first compression chamber.

3. The scroll compression mechanism according to claim 2, wherein: The auxiliary exhaust passage comprises a first auxiliary exhaust passage (116; 316) arranged in the fixed scroll wrap; during the pre-exhaust process, the first auxiliary exhaust passage communicates with the pre-exhaust passage and the central compression chamber.

4. The scroll compression mechanism according to claim 3, wherein: The first auxiliary exhaust passage includes a first inlet located on an end surface of the fixed scroll wrap and a first outlet located on a side surface of the fixed scroll wrap; During the pre-exhaust process, the first inlet is communicated with the pre-exhaust passage, and the first outlet is communicated with the central compression chamber.

5. The scroll compression mechanism according to claim 4, wherein: The first auxiliary exhaust channel includes a first section (116a) connected to the first inlet and a second section (116b) connected to the first outlet, and the first section of the first auxiliary exhaust channel is in communication with the second section of the first auxiliary exhaust channel.

6. The scroll compression mechanism according to claim 5, wherein: The first section of the first auxiliary exhaust passage is a blind hole extending from the end surface of the fixed scroll wrap in the axial direction. The second section of the first auxiliary exhaust passage is a groove provided on an inner side surface of the fixed scroll wrap and / or a groove provided on an outer side surface of the fixed scroll wrap.

7. The scroll compression mechanism according to any one of claims 1 to 6, wherein: The auxiliary exhaust passage comprises a second auxiliary exhaust passage (226; 326) arranged in the movable scroll wrap; during the pre-exhaust process, the second auxiliary exhaust passage communicates with the central compression chamber and the exhaust port.

8. The scroll compression mechanism according to claim 7, wherein: The second auxiliary exhaust passage includes a second inlet located on a side surface of the movable scroll wrap and a second outlet located on an end surface of the movable scroll wrap; During the pre-exhaust process, the second inlet is communicated with the central compression chamber, and the second outlet is communicated with the exhaust port.

9. The scroll compression mechanism according to claim 8, wherein: The second auxiliary exhaust channel includes a first section (226a) connected to the second outlet and a second section (226b) connected to the second inlet, and the first section of the second auxiliary exhaust channel is in communication with the second section of the second auxiliary exhaust channel.

10. The scroll compression mechanism according to claim 9, wherein: The first section of the second auxiliary exhaust passage is a blind hole extending from the end surface of the movable scroll wrap in the axial direction. The second section of the second auxiliary exhaust passage is a groove provided on the inner side surface of the movable scroll wrap and / or a groove provided on the outer side surface of the movable scroll wrap.

11. The scroll compression mechanism according to any one of claims 1 to 6 and 8 to 10, wherein: The movable scroll further includes a hub portion (123; 223; 323) extending from a second side of the movable scroll end plate opposite to the first side, the hub portion being configured to receive a drive shaft and be driven by the drive shaft.

12. The scroll compression mechanism according to any one of claims 1 to 6 and 8 to 10, wherein: The exhaust port is a single exhaust port provided substantially at the center of the fixed scroll end plate.

13. A scroll compressor comprising the scroll compression mechanism according to any one of claims 1 to 12.

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