Compression mechanism and scroll compressor

Abstract

A compression mechanism and a scroll compressor. The compression mechanism comprises: a first scroll member (10) provided with a first exhaust branch; and a second scroll member (20) adapted to cooperate with the first scroll member (10) to compress a gas. The second scroll member (20) is provided with a second exhaust branch, and the first exhaust branch and the second exhaust branch are adapted to discharge the compressed gas from the compression mechanism. The scroll compressor comprises the compression mechanism. In the compression mechanism and the scroll compressor, by means of providing the first exhaust branch and the second exhaust branch, the exhaust area of the compression mechanism is increased and the exhaust pressure drop is reduced, so that high-pressure gas can be quickly and smoothly discharged, thereby improving the performance of the compression mechanism and the scroll compressor having the compression mechanism.

Description

A compression mechanism and a scroll compressor

[0001] This application claims priority to the Chinese Patent Application No. 202410856673.0, filed on June 28, 2024, and entitled “A compression mechanism and a scroll compressor”. The entire content of this patent application is incorporated herein by reference. TECHNICAL FIELD

[0002] The present disclosure relates to a compression mechanism and a scroll compressor having the same. BACKGROUND

[0003] The content of this section merely provides background information related to the present disclosure and can not constitute the prior art.

[0004] During the operation of the scroll compressor, the refrigerant gas is compressed by the compression mechanism and then discharged from the scroll compressor. In the scroll compressor of the related art, a direct discharge design is usually adopted, in which the high-pressure exhaust gas passes through the exhaust port on the end plate of the fixed scroll plate and is discharged from the exhaust pipe of the scroll compressor. During the exhaust process of the scroll compressor adopting the direct discharge design, the exhaust pressure fluctuates greatly, which may cause a reliability risk of the pipeline connection and also may generate a large noise.

[0005] Therefore, it is necessary to improve the exhaust design of the compression mechanism of the scroll compressor to make the exhaust discharge smoothly. SUMMARY

[0006] One object of the present disclosure is to solve at least one of the above problems.

[0007] One aspect of the present disclosure is to provide a compression mechanism, comprising: a first scroll member, the first scroll member being provided with a first exhaust branch; a second scroll member, the second scroll member being adapted to cooperate with the first scroll member to compress a gas. The second scroll member is provided with a second exhaust branch, and the first exhaust branch and the second exhaust branch are adapted to discharge the compressed gas from the compression mechanism.

[0008] In one embodiment, the first scroll member is a fixed scroll member, and the first exhaust branch includes a first exhaust port passing through an end plate of the first scroll member in an axial direction. The second scroll member is a moving scroll member, and the second exhaust branch includes a second exhaust port passing through an end plate of the second scroll member in an axial direction.

[0009] In one embodiment, the second exhaust port is formed as a stepped hole, and an outlet section of the second exhaust port is concentric with a hub portion of the second scroll member.

[0010] In one embodiment, the first scroll member is a fixed scroll member, the first exhaust branch includes a first exhaust port, and the first exhaust port passes through an end plate of the first scroll member in an axial direction. The second scroll member is a movable scroll member, and the second exhaust branch includes a second exhaust port, and the second exhaust port is a blind hole formed in an end plate of the second scroll member and opens toward the first scroll member.

[0011] In one embodiment, the second exhaust branch further includes a plurality of exhaust passages, one end of each of the exhaust passages communicates with the second exhaust port, and the other end of each of the exhaust passages opens to an outside of the second scroll member.

[0012] In one embodiment, the exhaust passage includes a first exhaust section extending from the second exhaust port in a radial direction within the end plate of the second scroll member, and a second exhaust section communicating with the first exhaust section and extending to an outside of the second scroll member.

[0013] In one embodiment, the second exhaust section extends from the first exhaust section in an axial direction to the outside of the second scroll member. The second exhaust section extends within a wall of a hub portion of the second scroll member to an end portion of the hub portion, or the second exhaust section is located radially outward of the hub portion and extends to a bottom surface of the end plate of the second scroll member.

[0014] In one embodiment, the exhaust passage extends obliquely from the second exhaust port to the outside of the second scroll member.

[0015] In one embodiment, the first exhaust branch further includes a plurality of recesses formed in a side wall of the first scroll member, the plurality of recesses are spaced apart from each other in a circumferential direction and each passes through the side wall of the first scroll member in an axial direction.

[0016] Another aspect of the present disclosure is to provide a scroll compressor. The scroll compressor includes a first compression mechanism. The first compression mechanism is the compression mechanism according to any one of the embodiments of the present disclosure.

[0017] The scroll compressor further includes a first main bearing housing and a rotary shaft. The first main bearing housing includes a flange portion and a bottom portion spaced apart from each other in an axial direction to define an accommodation space for partially accommodating the first compression mechanism. The flange portion is adapted to support a second scroll member of the first compression mechanism, and the flange portion is provided with a plurality of grooves spaced apart from each other in a circumferential direction, the grooves opening to the accommodation space. The bottom portion of the first main bearing housing is provided with a plurality of air holes spaced apart from each other in the circumferential direction. The grooves and the air holes are configured to allow gas discharged from a first exhaust branch of the first compression mechanism to pass through the first main bearing housing. The rotary shaft is supported by the first main bearing housing and drives the second scroll member of the first compression mechanism.

[0018] In one embodiment, the scroll compressor further includes a first thrust plate, the second scroll member of the first compression mechanism is supported on the flange portion of the first main bearing block via the first thrust plate, and an outer peripheral portion of the first thrust plate is provided with a plurality of recesses spaced apart from each other in the circumferential direction, the recesses passing through the first thrust plate in the axial direction and communicating with the grooves of the first main bearing block.

[0019] In one embodiment, the rotating shaft is provided with an internal passage, the internal passage being configured to allow the gas discharged from the second gas discharge branch of the first compression mechanism to flow through the internal passage and be discharged.

[0020] In one embodiment, the rotating shaft passes through the first scroll member and the second scroll member of the first compression mechanism. The gas discharged from the second gas discharge branch of the first compression mechanism flows through the gas hole of the bottom portion of the first main bearing block. The gas hole of the bottom portion of the first main bearing block passes through the first main bearing block in the axial direction or obliquely with respect to the axial direction. Alternatively, the gas hole of the bottom portion of the first main bearing block is formed to include a plurality of gas passage segments connected to each other and angled with respect to each other.

[0021] In one embodiment, the scroll compressor further includes a second compression mechanism, the first compression mechanism and the second compression mechanism being driven by the same rotating shaft and being located at both ends of the rotating shaft, respectively.

[0022] In one embodiment, the scroll compressor further includes a first gas inlet port configured to supply gas to the first compression mechanism, a second gas inlet port configured to supply gas to the second compression mechanism, and a gas outlet port from which the gas discharged from the first compression mechanism and the gas discharged from the second compression mechanism are discharged to the outside of the scroll compressor.

[0023] In one embodiment, the second compression mechanism is identical to the first compression mechanism.

[0024] In one embodiment, the scroll compressor further includes a first gas inlet port configured to supply gas to the first compression mechanism, wherein the gas discharged from the first compression mechanism is supplied to the second compression mechanism, and a gas outlet port from which the gas discharged from the second compression mechanism is discharged to the outside of the scroll compressor.

[0025] The second compression mechanism includes a first scroll member, the first scroll member of the second compression mechanism being provided with a first exhaust port, and a second scroll member, the second scroll member of the second compression mechanism being adapted to cooperate with the first scroll member of the second compression mechanism to compress gas. The scroll compressor further includes a second main bearing seat, the second main bearing seat including a flange portion and a bottom portion, the flange portion of the second main bearing seat supporting the second scroll member of the second compression mechanism, and the bottom portion of the second main bearing seat being provided with a plurality of gas holes spaced apart from each other in a circumferential direction, the gas holes of the second main bearing seat being configured to allow the gas discharged from the first compression mechanism to flow to a compression chamber of the second compression mechanism.

[0026] In one embodiment, the scroll compressor further includes a second thrust plate, the second scroll member of the second compression mechanism being supported on the flange portion of the second main bearing seat via the second thrust plate, and the second thrust plate being provided with a plurality of gas holes spaced apart from each other in a circumferential direction, the gas holes of the second thrust plate being in communication with the gas holes of the second main bearing seat.

[0027] In one embodiment, the second scroll member of the second compression mechanism is provided with a plurality of internal gas passages, the internal gas passages including a first gas passage opening towards a hub portion of the second scroll member of the second compression mechanism and partially extending into an end plate of the second scroll member of the second compression mechanism, and a second gas passage in communication with the first gas passage and extending into an outside of the second scroll member of the second compression mechanism within the end plate of the second scroll member of the second compression mechanism.

[0028] The present disclosure provides an improved compression mechanism and scroll compressor. The compression mechanism and scroll compressor according to the present disclosure increase the exhaust area of the compression mechanism by providing a first exhaust branch and a second exhaust branch, reduce the exhaust pressure drop, and enable high-pressure gas to be quickly and smoothly exhausted, thus improving the performance of the compression mechanism and the scroll compressor having the same. In addition, it is also beneficial to the compact design of the scroll compressor and simplifies the oil management of the scroll compressor. BRIEF DESCRIPTION OF DRAWINGS

[0029] Embodiments of the present disclosure will be described below by way of example only with reference to the accompanying drawings. In the drawings, identical features or components are denoted by the same reference numerals, and the drawings are not necessarily to scale and in which:

[0030] FIG. 1 shows a plan view of a first scroll member of a compression mechanism according to a first embodiment of the present disclosure;

[0031] FIG. 2 shows a longitudinal sectional view of the first scroll member taken along line A-A in FIG. 1;

[0032] FIG. 3 shows a plan view of a second scroll member of a compression mechanism according to the first embodiment of the present disclosure;

[0033] FIG. 4 illustrates a longitudinal sectional view of the second scroll member taken along line B-B in FIG. 3;

[0034] FIG. 5 illustrates a longitudinal sectional view of the second scroll member of a compression mechanism according to a second embodiment of the present disclosure;

[0035] FIG. 6 illustrates a longitudinal sectional view of the second scroll member of a compression mechanism according to a third embodiment of the present disclosure;

[0036] FIG. 7 illustrates a longitudinal sectional view of the second scroll member of a compression mechanism according to a fourth embodiment of the present disclosure;

[0037] FIG. 8 illustrates a longitudinal sectional view of the second scroll member of a compression mechanism according to a fifth embodiment of the present disclosure;

[0038] FIG. 9 illustrates a partial longitudinal sectional view of a scroll compressor according to a first example of the present disclosure;

[0039] FIG. 10 illustrates a perspective view of a first thrust plate of the scroll compressor shown in FIG. 9;

[0040] FIG. 11 illustrates a perspective view of a first main bearing seat of the scroll compressor shown in FIG. 9;

[0041] FIG. 12 illustrates a partial longitudinal sectional view of a scroll compressor according to a second example of the present disclosure;

[0042] FIG. 13 illustrates a longitudinal sectional view of a scroll compressor according to a third example of the present disclosure;

[0043] FIG. 14 illustrates a longitudinal sectional view of a scroll compressor according to a fourth example of the present disclosure;

[0044] FIG. 15 illustrates a portion of the longitudinal sectional view of the scroll compressor shown in FIG. 14;

[0045] FIG. 16 illustrates a longitudinal sectional view of the second scroll member of a second compression mechanism of the scroll compressor shown in FIG. 14;

[0046] FIG. 17 illustrates a perspective view of a thrust plate of the second compression mechanism within the scroll compressor shown in FIG. 14; and

[0047] FIG. 18 illustrates a perspective view of a main bearing seat of the second compression mechanism within the scroll compressor shown in FIG. 14. DETAILED DESCRIPTION

[0048] The following description is merely exemplary in nature and is not intended to limit the present disclosure, application, and uses. It should be understood that throughout the drawings, corresponding reference numerals indicate like or similar parts and features. The various drawings are schematic illustrations only that represent concepts and principles of embodiments of the present disclosure and do not necessarily illustrate specific dimensions or ratios thereof. Certain portions of certain drawings can be exaggerated to illustrate relevant details or structures of embodiments of the present disclosure.

[0049] In the description of embodiments of the present disclosure, the orientation terms related to "upper" and "lower" are described with the upper and lower positions of the view shown in the drawings. In the actual application of the scroll compressor, the positional relationship of "upper", "lower", "left", and "right" used herein can be defined according to the actual situation, and these relationships can be reversed.

[0050] FIGS. 1 to 4 illustrate a compression mechanism according to a first embodiment of the present disclosure, in which FIG. 1 illustrates a plan view of a first scroll 10 of the compression mechanism according to the first embodiment of the present disclosure, FIG. 2 illustrates a longitudinal sectional view of the first scroll 10 taken along line A-A in FIG. 1, FIG. 3 illustrates a plan view of a second scroll 20 of the compression mechanism according to the first embodiment of the present disclosure, and FIG. 4 illustrates a longitudinal sectional view of the second scroll 20 taken along line B-B in FIG. 3.

[0051] As shown in FIGS. 1 and 2, the first scroll 10 includes an end plate 11 and a scroll portion 12 extending from the end plate 11 toward one side. A plurality of fixing holes 131 are provided on a side wall 13 of the first scroll 10 for a fixing member (e.g., a bolt) to pass through to fix the first scroll 10 in place. The first scroll 10 is provided with a first exhaust branch including a first exhaust port 14 provided on the end plate 11 of the first scroll 10 and passing through the end plate 11. In the example shown in the drawings, the first exhaust port 14 passes through the end plate 11 of the first scroll 10 in the axial direction. However, the present disclosure is not limited thereto, and in other examples according to the present disclosure, the first exhaust port on the first scroll 10 can adopt other suitable designs. Preferably, the first exhaust branch further includes a plurality of recesses 132 provided on the side wall 13 of the first scroll 10. The recesses 132 are formed on the outer periphery of the side wall 13 of the first scroll 10, are spaced apart from each other in the circumferential direction, and each pass through the side wall 13 of the first scroll 10 in the axial direction. The first exhaust port 14 communicates with the recesses 132 with each other through a space formed between the end plate 11 of the first scroll 10 and a housing (not shown) of a scroll compressor in which the compression mechanism is installed.

[0052] As shown in FIGS. 3 and 4, the second scroll member 20 includes an end plate 21 and a scroll portion 22 and a hub portion 23 extending from the end plate 21 toward opposite sides, respectively. The scroll portion 12 of the first scroll member 10 cooperates with the scroll portion 22 of the second scroll member 20 to define a series of compression pockets therebetween for compressing a gas, such as refrigerant gas mixed with lubricating oil. In the example shown in the figures, the first scroll member 10 is a fixed scroll member and the second scroll member 20 is an orbiting scroll member.

[0053] The second scroll member 20 is provided with a second discharge branch including a second discharge port 24 provided on the end plate 21 of the second scroll member 20, as shown in FIGS. 3 and 4. The second discharge port 24 communicates with a high-pressure pocket of the series of compression pockets between the first scroll member 10 and the second scroll member 20, is provided eccentrically to the hub portion 23 of the second scroll member 20, and passes through the end plate 21 of the second scroll member 20 in the axial direction. An outlet of the second discharge port 24 opens into the hub portion 23 of the second scroll member 20.

[0054] The compression mechanism according to the first embodiment of the present disclosure increases the discharge area of the compression mechanism by providing the first discharge branch and the second discharge branch described above, so that the high-pressure gas compressed by the first scroll member 10 and the second scroll member 20 can be discharged from the first discharge branch and the second discharge branch, reduces the discharge pressure drop, so that the high-pressure gas can be discharged quickly and smoothly, and thus the performance of the compression mechanism and the scroll compressor having the same can be improved. Moreover, the outlet of the second discharge branch (in this example, the second discharge port 24) of the second scroll member 20 opens into the hub portion 23 of the second scroll member 20, and thus the oil mist entrained in the discharged gas can flow through the bearing member (not shown in the figures) provided in the hub portion 23 of the second scroll member 20, and the like, so that lubrication of the bearing member and the like can be provided by the oil mist entrained in the discharged gas, and thus it is not necessary to provide an oil sump in the scroll compressor having the compression mechanism, and thus a more compact design of the scroll compressor can be achieved, and the oil management design of the scroll compressor can be simplified, and the cost can be reduced.

[0055] FIG. 5 shows a longitudinal sectional view of a second scroll member 30 of a compression mechanism according to a second embodiment of the present disclosure. The first scroll member of the compression mechanism according to the second embodiment of the present disclosure can be the same as the first scroll member 10 described above, and thus the description thereof will not be repeated here. The compression mechanism according to the second embodiment of the present disclosure differs from the compression mechanism according to the first embodiment of the present disclosure only in the design of the second discharge branch of the second scroll member.

[0056] The second exhaust branch of the second scroll member 30 includes a second exhaust port 34. As shown in FIG. 5, the second exhaust port 34 passes through the end plate 31 of the second scroll member 30 in the axial direction and is formed as a stepped hole including an inlet section 341 and an outlet section 342 extending in the axial direction. The inlet section 341 and the outlet section 342 communicate with each other and are offset from each other in the radial direction. The inlet section 341 is open toward the side where the scroll portion 32 of the second scroll member 30 is located, and communicates with a high-pressure chamber among the series of compression chambers of the compression mechanism. The outlet section 342 is concentric with the hub portion 33 of the second scroll member 30. The cross-sectional area of the outlet section 342 is larger than that of the inlet section 341. In other examples according to the present disclosure, the second exhaust port 34 can further include one or more intermediate sections between the inlet section 341 and the outlet section 342.

[0057] The compression mechanism according to the second embodiment of the present disclosure can achieve similar beneficial technical effects as the compression mechanism according to the first embodiment of the present disclosure. In addition, by forming the second exhaust port 34 as the above-mentioned stepped hole, the exhaust area can be further enlarged, and the exhaust throttling can be further reduced, which is conducive to the discharge control of the gas.

[0058] FIG. 6 shows a longitudinal sectional view of a second scroll member 40 of a compression mechanism according to a third embodiment of the present disclosure. The compression mechanism according to the third embodiment of the present disclosure has a structure generally similar to that of the compression mechanism according to the first embodiment of the present disclosure, with the difference only in the design of the second exhaust branch of the second scroll member 40. Hereinafter, only the difference between the compression mechanism according to the third embodiment of the present disclosure and the compression mechanism according to the first embodiment of the present disclosure will be described.

[0059] As shown in FIG. 6, the second exhaust branch of the second scroll member 40 includes a second exhaust port 44 and a plurality of exhaust passages 45. The second exhaust port 44 is a blind hole formed on the end plate 41 of the second scroll member 40, and the second exhaust port 44 opens toward the side where the scroll portion 42 of the second scroll member 40 is located. When installed in place, the second exhaust port 44 opens toward the first scroll member (not shown) of the compression mechanism.

[0060] One end of the exhaust passage 45 communicates with the second exhaust port 44, and the other end of the exhaust passage 45 leads to the outside of the compression mechanism, more specifically, to the outside of the second scroll member 10. As shown in FIG. 6, the exhaust passage 45 includes a first exhaust section 451 and a second exhaust section 452. The first exhaust section 451 extends from the second exhaust port 44 in the radial direction within the end plate 41 of the second scroll member 40. The second exhaust section 452 communicates with the first exhaust section 451 and extends in the axial direction within the wall of the hub portion 43 of the second scroll member 40 to the end of the hub portion 43, thereby leading to the outside of the compression mechanism.

[0061] The compression mechanism according to the third embodiment of the present disclosure can increase the exhaust area of the compression mechanism, reduce the exhaust pressure drop, so that the high-pressure gas can be quickly and smoothly discharged, thereby improving the performance of the compression mechanism and the scroll compressor having the same.

[0062] FIG. 7 shows a longitudinal sectional view of the second scroll 50 of the compression mechanism according to the fourth embodiment of the present disclosure. The compression mechanism according to the fourth embodiment of the present disclosure has a structure generally similar to that of the compression mechanism according to the third embodiment of the present disclosure, with the difference only in the design of the second exhaust branch of the second scroll 50. Hereinafter, only the difference between the compression mechanism according to the fourth embodiment of the present disclosure and the compression mechanism according to the third embodiment of the present disclosure will be described.

[0063] As shown in FIG. 7, the second exhaust branch of the second scroll 50 includes the second exhaust port 54 and a plurality of exhaust passages 55. The second exhaust port 54 is a blind hole formed on the end plate 51 of the second scroll 50, and the second exhaust port 54 opens toward the side where the scroll portion 52 of the second scroll 50 is located.

[0064] One end of the exhaust passage 55 communicates with the second exhaust port 54, and the other end of the exhaust passage 55 opens to the outside of the compression mechanism, more specifically, to the outside of the second scroll 50. As shown in FIG. 5, the exhaust passage 55 includes a first exhaust section 551 and a second exhaust section 552. The first exhaust section 551 extends from the second exhaust port 54 in the radial direction within the end plate 51 of the second scroll 50. The second exhaust section 552 communicates with the first exhaust section 551, is located radially outward of the hub portion 53 of the second scroll 50, and extends to the bottom surface of the end plate 51 in the axial direction, thereby opening to the outside of the compression mechanism. The bottom surface of the end plate 51 refers to the surface of the side of the end plate 51 opposite to the side where the scroll portion 52 is located.

[0065] The compression mechanism according to the fourth embodiment of the present disclosure can achieve similar beneficial technical effects as the compression mechanism according to the third embodiment of the present disclosure.

[0066] FIG. 8 shows a longitudinal sectional view of the second scroll 60 of the compression mechanism according to the fifth embodiment of the present disclosure. The compression mechanism according to the fifth embodiment of the present disclosure has a structure generally similar to that of the compression mechanism according to the third embodiment of the present disclosure, with the difference only in the design of the second exhaust branch of the second scroll 60. Hereinafter, only the difference between the compression mechanism according to the fifth embodiment of the present disclosure and the compression mechanism according to the third embodiment of the present disclosure will be described.

[0067] As shown in FIG. 8, the second discharge branch of the second scroll member 60 includes a second discharge port 64 and a plurality of discharge passages 65. The second discharge port 64 is a blind hole formed in the end plate 61 of the second scroll member 60, and the second discharge port 64 opens toward the side on which the spiral portion 62 of the second scroll member 60 is located. One end of the discharge passage 65 communicates with the second discharge port 64, and the other end of the discharge passage 65 opens to the outside of the compression mechanism, more specifically, to the outside of the second scroll member 60. As shown in FIG. 8, the discharge passage 65 extends obliquely to the axial direction from the second discharge port 64 to the outside of the compression mechanism.

[0068] The compression mechanism according to the fifth embodiment of the present disclosure can achieve similar advantageous technical effects described above as the compression mechanism according to the third embodiment of the present disclosure.

[0069] FIG. 9 shows a partial longitudinal sectional view of a first example of a scroll compressor according to the present disclosure. As shown in FIG. 9, the scroll compressor 100 includes a rotating shaft 70, a first compression mechanism M1, a first thrust plate 80, and a first main bearing seat 90. The eccentric crank pin of the end portion of the rotating shaft 70 is mounted in the hub portion 23 of the second scroll member 20 via a bearing B1 and an unloading bushing C1. The rotating shaft 70 is provided with an internal passage 71 including a first passage 711 and a second passage 712. The first passage 711 extends in the axial direction, and the second passage 712 communicates with the first passage 711 and extends from the first passage 711 to the outer peripheral surface of the rotating shaft 70. In the example shown in the figure, the second passage 712 extends outwardly in the radial direction from the first passage 711 to the outer peripheral surface of the rotating shaft 70. However, the present disclosure is not limited thereto. In other examples according to the present disclosure, the second passage 712 can extend obliquely with respect to the radial direction, for example, obliquely downward with respect to the radial direction.

[0070] The first compression mechanism M1 is a compression mechanism according to the first embodiment of the present disclosure, including a first scroll member 10, a second scroll member 20. The end plate 21 of the second scroll member 20 is supported on the first main bearing seat 90 via the thrust plate 80.

[0071] FIG. 10 shows a perspective view of the first thrust plate 80. As shown in FIG. 10, the first thrust plate 80 is provided with a plurality of fixing holes 81 spaced apart from each other in the circumferential direction, and the outer peripheral portion of the first thrust plate 80 is provided with a plurality of recesses 82 spaced apart from each other, the recesses 82 passing through the first thrust plate 80 in the axial direction. FIG. 11 shows a perspective view of the first main bearing seat 90. The first main bearing seat 90 includes a flange portion 91 and a bottom portion 92 spaced apart from each other in the axial direction and defining an accommodation space V2 for partially accommodating the first compression mechanism M1. As shown in FIG. 11, the flange portion 91 is provided with a plurality of fixing holes 911 spaced apart from each other in the circumferential direction and a plurality of grooves 912 leading from the outer peripheral surface of the flange portion 91 to the accommodation space V2. The bottom portion 92 of the first main bearing seat 90 is provided with a plurality of gas holes 921 spaced apart from each other in the circumferential direction, the gas holes 921 passing through the bottom portion 92 of the bearing seat 90. The grooves 912 and the gas holes 921 are arranged to allow the gas discharged from the first exhaust branch of the first compression mechanism M1 to pass through the first main bearing seat 90.

[0072] Referring back to FIG. 9, a plurality of fasteners T pass through the fixing holes 131 of the first scroll member 10, the fixing holes 81 of the first thrust plate 80, and are engaged into the fixing holes 911 on the flange portion 91 of the first main bearing seat 90, thereby fixing the first fixed scroll member 10, the first thrust plate 80, and the first main bearing seat 90 together. When installed in place, the recesses 132 on the first scroll member 10, the recesses 82 on the first thrust plate 80, and the grooves 912 on the flange portion 91 of the first main bearing seat 90 are aligned with each other, so that the gas discharged from the first exhaust branch of the first compression mechanism M1 can flow into the accommodation space V2 of the first main bearing seat 90 through the recesses on the first thrust plate 80 and the grooves 912 on the first main bearing seat 90, and out of the first main bearing seat 90 through the gas holes 921. The recesses 82 on the first thrust plate 80, the grooves 912 of the main bearing seat 90, and the gas holes 921 form a continuation branch of the first exhaust branch of the first compression mechanism M1. Specifically, as shown by the thick arrow in FIG. 9, a portion of the gas compressed by the first compression mechanism M1 is discharged from the first exhaust port 14 of the first fixed scroll member 10 to the space V1 between the first fixed scroll member 10 and the housing of the scroll compressor 100, and flows to the recesses 132 on the first fixed scroll member 10 (not shown in FIG. 9, see FIG. 2), through the recesses 82 on the first thrust plate 80 (not shown in FIG. 9, see FIG. 10), the grooves 912 on the flange portion 91 of the first main bearing seat 90 (not shown in FIG. 9, see FIG. 11), into the accommodation space V2, and out of the first main bearing seat 90 through the gas holes 921, to the space within the scroll compressor 100, and finally out of the scroll compressor 100 through the exhaust port (not shown in the drawings).

[0073] In addition, another portion of the gas compressed by the first compression mechanism M1 is discharged through a second discharge branch of the first compression mechanism M1. Specifically, as shown by the thin arrow in FIG. 9, the gas compressed by the first compression mechanism M1 can flow into the hub portion 23 of the second scroll member 20 through the second discharge port 24 of the second scroll member 20, and flow out of the rotating shaft 70 through the internal passage 71 of the rotating shaft 70, to the space inside the scroll compressor 100, and finally be discharged out of the scroll compressor 100 through a discharge port (not shown in the figure). The internal passage 71 of the rotating shaft 70 forms a continuation branch of the second discharge branch of the first compression mechanism M1.

[0074] By providing the first discharge branch and the second discharge branch in the first compression mechanism M1 of the scroll compressor 100 as described above, the discharge area of the first compression mechanism M1 is increased, and the discharge pressure drop is reduced, so that the compressed high-pressure gas can be quickly and smoothly discharged, and the performance of the scroll compressor 100 can be improved. Moreover, the gas discharged from the second discharge port 24 flows into the hub portion 23 of the second scroll member 20, and provides lubrication for the bearing B1 and the unloading bushing C1 in the hub portion 23, and the bearing B2 installed in the central through hole 93 (not shown in FIG. 9, see FIG. 11) of the first main bearing seat 90, through the oil mist entrained in the discharged gas, so that it is not necessary to provide an oil sump in the scroll compressor 100, and thus a more compact design of the scroll compressor 100 can be achieved, and the oil management design is simplified, and the cost is reduced.

[0075] In the example shown in the figure, the first compression mechanism M1 of the scroll compressor 100 is a compression mechanism according to the first embodiment of the present disclosure. However, the present disclosure is not limited thereto, and in other examples according to the present disclosure, the first compression mechanism M1 can be a compression mechanism according to any one of the other embodiments of the present disclosure. In addition, in the example shown in the figure, the first thrust plate 80 and the first main bearing seat 90 are separately formed and assembled together. However, the present disclosure is not limited thereto, and in other examples according to the present disclosure, the first thrust plate 80 and the first main bearing seat 90 can be formed as a single piece.

[0076] FIG. 12 shows a partial longitudinal sectional view of a second example of a scroll compressor according to the present disclosure. As shown in FIG. 12, the scroll compressor 200 includes a first compression mechanism M1A, a rotating shaft 70A, and a first main bearing housing 90B. The first compression mechanism M1A includes a first scroll member 10A, a second scroll member 20A. The first discharge branch of the first scroll member 10A includes a first discharge port 14A, and preferably, also includes a notch formed on a side wall of the first scroll member 10A (not shown in the figure). The second discharge branch of the second scroll member 20A includes a second discharge port 24A, which includes an inlet section 241A and an outlet end 242A. The bottom of the first main bearing housing 90B is provided with an air hole 921B. In the example shown in the figure, the air hole 921B extends through the bottom of the main bearing housing 90B in the axial direction. However, the present disclosure is not limited thereto, and in other examples according to the present disclosure, the air hole 921B can be formed as an air passage including multiple air passage sections connected to each other and angled with respect to each other, to guide the discharge air through the second main bearing housing 90B, as shown by the dashed line K in FIG. 12. The air hole 921B forms a continuation branch of the second discharge branch of the first compression mechanism M1A. The rotating shaft 70A extends through the first scroll member 10A and the second scroll member 20A in the axial direction. A seal S1 is provided between the end plate 21A of the second scroll member 20A and the main bearing housing 90B, and is arranged to surround the rotating shaft 70A, for separating the lubricating oil fed through the oil feeding passage 74 in the rotating shaft 70A from the gas discharged from the first compression mechanism M1A, e.g., for isolating the lubricating oil fed through the oil feeding passage 74 from the gas discharged from the second discharge port 24A of the second scroll member 20A of the first compression mechanism M1A. In the example shown in the figure, the seal S1 is provided on the first main bearing housing 90B. However, the present disclosure is not limited thereto, and the seal S1 can also be provided on the end plate 21A of the second scroll member 20A. Alternatively, a seal S2 can be provided, which is arranged to surround the second discharge port 24A of the second scroll member 20A.

[0077] The scroll compressor 200, by providing the above-described first discharge branch and second discharge branch, can achieve similar beneficial effects as described above.

[0078] FIG. 13 shows a longitudinal sectional view of a third example of a scroll compressor according to the present disclosure. As shown in FIG. 13, the scroll compressor 300 includes a first compression mechanism M1C and a second compression mechanism M2, and includes a first suction port P11, a second suction port P12, and a discharge port P2. The first suction port P11 supplies suction gas to the first compression mechanism M1C, the second suction port P12 supplies suction gas to the second compression mechanism M2, and the discharge gas after being compressed by the first compression mechanism M1C and the discharge gas after being compressed by the second compression mechanism M2 are both discharged from the scroll compressor 300 through the discharge port P2. The first compression mechanism M1C and the second compression mechanism M2 are both driven by the rotary shaft 70C and are located at both ends of the rotary shaft 70C, respectively. The scroll compressor 300 further includes a first thrust plate 80C, a first main bearing seat 90C, a second thrust plate 80D, and a second main bearing seat 90D.

[0079] The rotary shaft 70C is provided with a first internal passage 71C and a second internal passage 72. The first internal passage 71C includes a first passage 711C and a second passage 712C. The first passage 711C extends in the axial direction. The second passage 712C communicates with the first passage 711C and extends from the first passage 711C to the outer peripheral surface of the rotary shaft 70C. In the example shown in the figure, the second passage 712C extends in the radial direction of the rotary shaft 70C. However, the present disclosure is not limited thereto, and in other examples according to the present disclosure, the second passage 712C can also extend obliquely from the first passage 711C with respect to the radial direction of the rotary shaft 70C. The second internal passage 72 has the same configuration as the first internal passage 71C, including a first passage 721 and a second passage 722.

[0080] The first compression mechanism M1C includes a first scroll 10C and a second scroll 20C. The first compression mechanism M1C is a compression mechanism according to the first embodiment of the present disclosure, the first scroll 10C is exactly the same as the first scroll 10 shown in FIGS. 1 and 2, the second scroll 20C is exactly the same as the second scroll 20 shown in FIGS. 3 and 4, in addition, the first thrust plate 80C is exactly the same as the first thrust plate 80 shown in FIG. 10, and the first main bearing seat 90C is exactly the same as the first main bearing seat 90 shown in FIG. 11, and the specific structure thereof will not be repeated here. The gas after being compressed by the first compression mechanism M1C can be discharged from the first compression mechanism M1C through the first discharge branch of the first compression mechanism M1C, and finally discharged from the scroll compressor 300 through the discharge port P2. In addition, the gas after being compressed by the first compression mechanism M1C can also be discharged from the first compression mechanism M1C through the second discharge branch of the first compression mechanism M1C, and finally discharged from the scroll compressor 300 through the discharge port P2.

[0081] The second compression mechanism M2 includes a first scroll member 10D and a second scroll member 20D. In the example shown in the figure, the second compression mechanism M2 is identical to the first compression mechanism M1C, the first scroll member 10D and the second scroll member 20D of the second compression mechanism M2 have the same configuration as the first scroll member 10C and the second scroll member 20C of the first compression mechanism M1C respectively, and the second thrust plate 80D and the second main bearing seat 90D have the same configuration as the first thrust plate 80C and the first main bearing seat 90C respectively, which will not be repeated here. The gas compressed by the second compression mechanism M2 can be discharged from the second compression mechanism M2 through the first exhaust branch of the second compression mechanism M2, and finally discharged from the scroll compressor 300 through the exhaust port P2, and the gas compressed by the second compression mechanism M2 can also be discharged from the second compression mechanism M2 through the second exhaust branch of the second compression mechanism M2, and finally discharged from the scroll compressor 300 through the exhaust port P2.

[0082] The scroll compressor 300 can achieve similar beneficial effects as the aforementioned scroll compressor 100.

[0083] FIG. 14 shows a longitudinal sectional view of a fourth example of a scroll compressor according to the present disclosure. As shown in FIG. 14, the scroll compressor 400 includes a first compression mechanism M1F and a second compression mechanism M2A, and includes a first intake port P11 and an exhaust port P2. The first intake port P11 supplies intake gas to the first compression mechanism M1F, the gas compressed by the first compression mechanism M1F is supplied to the second compression mechanism M2A, and the exhaust gas compressed by the second compression mechanism M2A is discharged from the scroll compressor 400 through the exhaust port P2. The first compression mechanism M1F and the second compression mechanism M2 are both driven by the rotary shaft 70D, and are respectively located at both ends of the rotary shaft 70D.

[0084] The two ends in the axial direction of the rotary shaft 70D are respectively fitted in the hub portion 23F of the second scroll member 20F of the first compression mechanism M1F and in the hub portion 23E of the second scroll member 20E of the second compression mechanism M2A. The rotary shaft 70D is provided with an internal passage 73 extending within the rotary shaft 70D from one end of the rotary shaft 70D to the other end. The scroll compressor 400 further includes a first thrust plate 80F, a first main bearing seat 90F, a second thrust plate 80E, and a second main bearing seat 90E.

[0085] The first compression mechanism M1F includes the first scroll member 10F and the second scroll member 20F. The first compression mechanism M1F is a compression mechanism according to the first embodiment of the present disclosure, the first scroll member 10F is exactly the same as the first scroll member 10 shown in FIGS. 1 and 2, the second scroll member 20F is exactly the same as the second scroll member 20 shown in FIGS. 3 and 4, and the first thrust plate 80F is exactly the same as the first thrust plate 80 shown in FIG. 10, the first main bearing seat 90F is exactly the same as the first main bearing seat 90 shown in FIG. 11, and the specific structure thereof will not be repeated here. The gas compressed by the first compression mechanism M1F can be discharged from the first compression mechanism M1F through the first exhaust branch of the first compression mechanism M1F and supplied to the second compression mechanism M2A, and the gas compressed by the first compression mechanism M1F can also be discharged from the first compression mechanism M1F through the second exhaust branch of the first compression mechanism M1F and supplied to the second compression mechanism M2A. The second compression mechanism M2A includes the first scroll member 10E and the second scroll member 20E. The gas compressed by the second compression mechanism M2A is discharged from the first exhaust port 14E of the first scroll member 10E of the second compression mechanism M2A and finally discharged from the exhaust port P2 of the scroll compressor 400.

[0086] FIG. 15 shows a part of the longitudinal sectional view of the scroll compressor 400 from another angle, showing the design of the second scroll member 20E of the second compression mechanism M2A. The first scroll member 10E has a structure substantially similar to that of the first scroll member 10 shown in FIGS. 1 and 2, having the first exhaust port 14E. The gas compressed by the second compression mechanism M2A is discharged through the first exhaust port 14E.

[0087] The second scroll member 20E is provided with a plurality of internal gas passages 25. The internal gas passages 25 include a first gas passage 251 and a second gas passage 252 which communicate with each other. FIG. 16 shows a longitudinal sectional view of the second scroll member 20E. As shown in FIG. 16, the first gas passage 251 extends from one side surface of the end plate 22E to the inside of the end plate 21E, and the first gas passage 251 opens toward the inside of the hub portion 23E. The second gas passage 252 extends in the radial direction to the outer periphery of the end plate 21E in the inside of the end plate 21E.

[0088] FIG. 17 shows a perspective view of the second thrust plate 80E. As shown in FIG. 17, the second thrust plate 80E is provided with a plurality of gas holes 84 which are spaced apart from each other in the circumferential direction. FIG. 18 shows a perspective view of the second main bearing seat 90E. As shown in FIG. 18, the bottom 92E of the second main bearing seat 90E is provided with a plurality of gas holes 921E which are spaced apart from each other in the circumferential direction.

[0089] When installed in place, as shown in FIG. 14, the outer periphery 85 of the second thrust plate 80E is supported on the flange portion 91E of the second main bearing seat 90E, and the gas hole 84 of the second thrust plate 80E is aligned with the gas hole 921E on the second main bearing seat 90E, so that the gas supplied from the first exhaust branch of the first compression mechanism M1F passes through the gas hole 921E (not shown in FIG. 14) of the second main bearing seat 90E, the gas hole 84 (not shown in FIG. 14) of the second thrust plate 80E, and is supplied to the compression cavity of the second compression mechanism M2A. In addition, the gas supplied from the second exhaust branch of the first compression mechanism M1F is supplied to the hub portion 23E of the second scroll 20E of the second compression mechanism M2A via the internal passage 73 of the rotating shaft 70D, and flows out via the internal gas passage 25 in the second scroll 20E, and is supplied to the compression cavity of the second compression mechanism M2A.

[0090] The scroll compressor 400 increases the exhaust area of the first compression mechanism M1F by providing the first exhaust branch and the second exhaust branch in the first compression mechanism M1F, reduces the exhaust pressure drop, so that the compressed high-pressure gas can be quickly and smoothly exhausted. And the gas exhausted from the second exhaust port (not shown in FIG. 14) of the first compression mechanism M1F flows into the hub portion 23F of the second scroll 20F of the first compression mechanism M1F, and flows into the hub portion 23E of the second scroll 20E of the second compression mechanism M2A via the internal passage 73 of the rotating shaft 70D, and the oil mist entrained in the exhausted gas can provide lubrication to the bearings and the unloading bushings of the hub portion 23F and the hub portion 23E, so that it is not necessary to provide an oil sump in the scroll compressor 400, thus the scroll compressor 400 can be designed more compactly, and the oil management design is simplified, and the cost is reduced.

[0091] Here, the exemplary embodiments of the compression mechanism and the scroll compressor of the present disclosure have been described in detail, but it should be understood that the present disclosure is not limited to the specific embodiments described and shown in detail above. Those skilled in the art can make various modifications and variations to the present disclosure without departing from the spirit and scope of the present disclosure. All these modifications and variations fall within the scope of the present disclosure. Moreover, all the components described herein can be replaced by other technically equivalent components.

Claims

1. A compression mechanism, comprising: A first vortex component, wherein the first vortex component is provided with a first exhaust branch; A second scroll element, adapted to cooperate with the first scroll element to compress gas. The second vortex component is characterized by having a second exhaust branch, wherein the first exhaust branch and the second exhaust branch are adapted to discharge the compressed gas from the compression mechanism.

2. The compression mechanism according to claim 1, wherein, The first vortex component is a fixed vortex component, and the first exhaust branch includes a first exhaust port, which passes through the end plate of the first vortex component in the axial direction. as well as The second vortex component is a moving vortex component, and the second exhaust branch includes a second exhaust port, which passes through the end plate of the second vortex component in the axial direction.

3. The compression mechanism according to claim 2, wherein, The second exhaust port is formed as a stepped hole, and the outlet section of the second exhaust port is concentric with the hub of the second vortex member.

4. The compression mechanism according to claim 1, wherein, The first vortex component is a fixed vortex component, and the first exhaust branch includes a first exhaust port, which passes through the end plate of the first vortex component in the axial direction. as well as The second vortex component is a moving vortex component, and the second exhaust branch includes a second exhaust port, which is a blind hole formed on the end plate of the second vortex component and opens toward the first vortex component.

5. The compression mechanism according to claim 4, wherein, The second exhaust branch also includes a plurality of exhaust channels, one end of each exhaust channel being connected to the second exhaust port, and the other end of each exhaust channel being connected to the outside of the second vortex member.

6. The compression mechanism according to claim 5, wherein, The exhaust passage includes: A first exhaust section extends radially from the second exhaust port within the end plate of the second vortex member; and The second exhaust section is connected to the first exhaust section and extends to the outside of the second vortex member.

7. The compression mechanism according to claim 6, wherein, The second exhaust section extends axially from the first exhaust section to the outside of the second vortex member; and The second exhaust section extends within the wall of the hub of the second scroll member to the end of the hub, or the second exhaust section is located radially outward of the hub and extends to the bottom surface of the end plate of the second scroll member.

8. The compression mechanism according to claim 5, wherein, The exhaust passage extends obliquely from the second exhaust port to the outside of the second vortex member.

9. The compression mechanism according to any one of claims 2-8, wherein, The first exhaust branch also includes a plurality of recesses formed on the sidewall of the first vortex member, the plurality of recesses being spaced apart from each other in the circumferential direction and all passing through the sidewall of the first vortex member in the axial direction.

10. A scroll compressor, the scroll compressor comprising a first compression mechanism, characterized in that, The first compression mechanism is a compression mechanism according to any one of claims 1-9.

11. The scroll compressor according to claim 10, wherein, The scroll compressor also includes: A first main bearing housing includes a flange and a bottom, the flange and the bottom being axially spaced apart to define a receiving space for partially accommodating a first compression mechanism. The flange is adapted to support a second scroll member of the first compression mechanism, and the flange is provided with a plurality of circumferentially spaced grooves opening into the receiving space. The bottom of the first main bearing housing is provided with a plurality of circumferentially spaced vents, the grooves and the vents being configured to allow gas discharged from the first exhaust branch of the first compression mechanism to pass through the first main bearing housing. A rotating shaft, which is supported on the first main bearing housing and drives the second scroll member of the first compression mechanism.

12. The scroll compressor according to claim 11, wherein, The scroll compressor further includes a first thrust plate, the second scroll component of the first compression mechanism is supported on the flange of the first main bearing seat via the first thrust plate, and the outer periphery of the first thrust plate is provided with a plurality of recesses spaced apart from each other in the circumferential direction, the recesses passing through the first thrust plate in the axial direction and communicating with the groove of the first main bearing seat.

13. The scroll compressor according to claim 11, wherein, The rotating shaft is provided with an internal channel, which is configured to allow gas discharged from the second exhaust branch of the first compression mechanism to flow through the internal channel and be discharged.

14. The scroll compressor according to claim 11, wherein, The rotating shaft passes through the first scroll member and the second scroll member of the first compression mechanism; Among them, the gas discharged from the second exhaust branch of the first compression mechanism flows through the air hole at the bottom of the first main bearing housing; and Wherein, the air vent at the bottom of the first main bearing housing passes through the first main bearing housing along the axial direction or at an angle relative to the axial direction, or the air vent at the bottom of the first main bearing housing is formed as a plurality of air passage segments connected to each other and angled relative to each other.

15. The scroll compressor according to any one of claims 10-14, wherein, The scroll compressor further includes a second compression mechanism. The first compression mechanism and the second compression mechanism are driven by the same rotating shaft and are located at opposite ends of the rotating shaft.

16. The scroll compressor according to claim 15, wherein, The scroll compressor also includes: A first air inlet port is configured to supply gas to the first compression mechanism; A second air intake port, configured to supply gas to the second compression mechanism; and The exhaust port allows gas discharged from both the first and second compression mechanisms to exit to the outside of the scroll compressor.

17. The scroll compressor according to claim 16, wherein, The second compression mechanism is the same as the first compression mechanism.

18. The scroll compressor according to claim 15, wherein, The scroll compressor also includes: A first air inlet port, configured to supply gas to the first compression mechanism, wherein gas discharged from the first compression mechanism is supplied to the second compression mechanism; and The exhaust port allows the gas discharged from the second compression mechanism to be discharged to the outside of the scroll compressor.

19. The scroll compressor according to claim 18, wherein, The second compression mechanism includes: A first scroll member, wherein the first scroll member of the second compression mechanism is provided with a first exhaust port; and The second scroll member of the second compression mechanism is adapted to cooperate with the first scroll member of the second compression mechanism to compress gas. The scroll compressor further includes a second main bearing housing, which includes a flange and a bottom. The flange of the second main bearing housing supports the second scroll component of the second compression mechanism. The bottom of the second main bearing housing is provided with a plurality of circumferentially spaced air holes. The air holes of the second main bearing housing are configured to allow gas discharged from the first compression mechanism to flow into the compression chamber of the second compression mechanism.

20. The scroll compressor according to claim 19, wherein, The scroll compressor further includes a second thrust plate, the second scroll component of the second compression mechanism is supported on the flange portion of the second main bearing housing via the second thrust plate, and the second thrust plate is provided with a plurality of air holes spaced apart from each other in the circumferential direction, the air holes of the second thrust plate communicating with the air holes of the second main bearing housing.

21. The scroll compressor according to claim 19, wherein, The second scroll member of the second compression mechanism is provided with a plurality of internal air passages, the internal air passages including: A first air passage, the first air passage opening toward the hub of the second scroll member of the second compression mechanism and extending partially into the end plate of the second scroll member of the second compression mechanism; and The second air passage communicates with the first air passage and extends within the end plate of the second scroll member of the second compression mechanism to the outside of the second scroll member of the second compression mechanism.

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