Lubrication cycle system and compressor

Abstract

The application provides a lubricating circulating system and a compressor, and relates to the technical field of compressors, and solves the technical problems that the lubricating oil separated from the high-pressure side of the compressor affects the return of the lubricating oil to the low-pressure side when the compressor is in an inclined operation, and that the oil return channel is prone to air mixing. The lubricating circulating system of the compressor comprises: an oil storage cavity arranged on the back side of a static plate and used for storing the lubricating oil separated from the high-pressure side of the compressor; an upper cover oil return hole arranged on an upper cover and in communication with the oil distribution cavity and the oil storage cavity respectively, so as to return the lubricating oil separated from the high-pressure side of the compressor into the oil storage cavity; and a static plate oil return hole arranged at the bottom of the oil storage cavity and in communication with a shell support cavity, so as to return the lubricating oil in the oil storage cavity into the shell support cavity; when the compressor is inclined, the lubricating oil in the oil storage cavity can always cover the static plate oil return hole. The lubricating oil separated from the high-pressure side of the compressor can be smoothly returned to the low-pressure side, and the oil return channel does not produce air mixing.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a lubrication circulation system and a compressor. BACKGROUND

[0002] The application field of scroll compressors is becoming more and more extensive, and the tilt angle of the compressor is required to be more and more large, and the compressor can be applied to the tilt in an indefinite direction.

[0003] The applicant finds that the prior art at least has the following technical problems: 1. The tilt of the compressor will affect the lubricating oil level of the compressor, thereby affecting the oil pumping lubrication of the compressor; 2. The tilt of the compressor will also affect the return of the lubricating oil separated on the high-pressure side to the low-pressure side, and the oil return channel is prone to gas mixing; 3. The application environment of the scroll compressor is becoming more and more severe, and the load is becoming larger and larger, when the compressor runs at a low suction temperature, part of the refrigerant will return to the compressor in a liquid state, which is called liquid return, too much liquid refrigerant will dilute the lubricating oil and affect the lubrication of the compressor, and the evaporation of the liquid refrigerant will cause a large amount of foam in the lubricating oil, which will cause liquid to enter the scroll disc in an extreme case, causing irreparable damage to the compressor. SUMMARY

[0004] The purpose of the present application is to provide a lubrication circulation system and a compressor to solve the technical problems in the prior art that the tilt of the compressor affects the return of the lubricating oil separated on the high-pressure side to the low-pressure side, and the oil return channel is prone to gas mixing.

[0005] To achieve the above-mentioned purpose, the present application provides the following technical solutions:

[0006] The present application provides a compressor lubrication circulation system, comprising:

[0007] An oil storage cavity is arranged on the back side of the static disc to store the lubricating oil separated on the high-pressure side of the compressor;

[0008] An upper cover oil return hole is formed in the upper cover and communicates with the oil distribution cavity and the oil storage cavity to return the lubricating oil separated on the high-pressure side of the compressor to the oil storage cavity;

[0009] A static disc oil return hole is formed in the bottom of the oil storage cavity and communicates with the shell support cavity to return the lubricating oil in the oil storage cavity to the shell support cavity;

[0010] When the compressor is tilted, the lubricating oil in the oil storage cavity can always cover the static disc oil return hole.

[0011] The compressor lubrication circulation system provided by the application is characterized in that an oil storage cavity is arranged on the back side of the static disc, and when the compressor is in an inclined operation, the lubricating oil in the oil storage cavity on the static disc can cover the oil return hole of the static disc, so that the lubricating oil separated on the high-pressure side of the compressor can flow back to the low-pressure side smoothly, and because the oil return hole of the static disc is always covered by the lubricating oil, the gaseous refrigerant in the oil separation cavity of the upper cover cannot enter the oil return channel of the pump body assembly, and air leakage does not occur.

[0012] As a further improvement of the application, the oil storage cavity is located on the low-pressure cavity side of the static disc.

[0013] As a further improvement of the application, the oil return hole of the static disc comprises an oil return inclined hole and an oil return straight hole arranged in sequence; the oil return straight hole is arranged at the front side edge of the static disc; one end of the oil return inclined hole is in communication with the oil return straight hole, and the other end is in communication with the bottom of the oil storage cavity.

[0014] As a further improvement of the application, the lubrication circulation system further comprises a first oil return hole of the wear-resistant sheet arranged on the wear-resistant sheet below the dynamic disc; the first oil return hole of the wear-resistant sheet is arranged opposite to the oil return hole of the static disc; the lubrication circulation system further comprises a housing drainage groove, and the housing drainage groove is arranged on the housing support table and extends to a position below the first oil return hole of the wear-resistant sheet at one end and to the top of the housing support cavity at the other end.

[0015] As a further improvement of the application, the lubrication circulation system further comprises a first oil return hole of the wear-resistant sheet and a second oil return hole of the wear-resistant sheet arranged on the wear-resistant sheet below the dynamic disc; the first oil return hole of the wear-resistant sheet is arranged opposite to the oil return hole of the static disc; the lubrication circulation system further comprises a first oil return hole of the dynamic disc and a second oil return hole of the dynamic disc arranged on the dynamic disc; the first oil return hole of the dynamic disc is vertically arranged, one end of the first oil return hole of the dynamic disc is arranged opposite to the second oil return hole of the wear-resistant sheet, and the other end of the first oil return hole of the dynamic disc is in communication with the second oil return hole of the dynamic disc arranged horizontally; the end of the second oil return hole of the dynamic disc extends into the crankshaft through hole of the dynamic disc; the lubrication circulation system further comprises a housing drainage groove, and the housing drainage groove is arranged on the housing support table and extends to a position below the first oil return hole of the wear-resistant sheet at one end and to a position below the second oil return hole of the wear-resistant sheet at the other end.

[0016] As a further improvement of the application, the lubrication circulation system further comprises a first oil return boss of the housing, a first oil return groove of the housing, a return piece accommodation groove, and a return piece; wherein:

[0017] The first oil return boss of the housing is arranged at the bottom of the housing support cavity and located between the main bearing limiting boss and the crankshaft through hole;

[0018] The first shell oil return groove is arranged between the inner wall of the shell support cavity and the main bearing limiting boss, and a plurality of connecting grooves are arranged on the first shell oil return groove, one end of the connecting groove is communicated with the first shell oil return groove, and the other end extends to the position of the first shell oil return boss;

[0019] The oil return piece accommodation groove is arranged at the bottom of the shell support cavity and is communicated with the first shell oil return boss and the oil return piece respectively;

[0020] The oil return piece is installed on the side of the main bearing installation;

[0021] A gap is left between the first shell oil return boss and the inner ring of the main bearing to form a return flow channel;

[0022] A gap is left between the crankshaft through hole and the crankshaft to form a shell oil return hole;

[0023] The shell oil return hole is communicated with the return flow channel.

[0024] Through the above structure, most of the lubricating oil in the shell support cavity still flows back into the oil pool at the bottom of the compressor through the oil return piece, and a small part of the lubricating oil flows down along the crankshaft through the gap below the inner ring of the main bearing, and the lubricating oil flowing down along the crankshaft is scattered by the high-speed rotation of the crankshaft rotor assembly, and the scattered lubricating oil is sucked into the scroll disc together with the refrigerant, so that the lubrication of the scroll disc is ensured; the problem that the relative position of the lubricating oil level of the compressor to the oil pumping piece is affected when the compressor is tilted, thereby affecting the lubrication of the compressor.

[0025] As a further improvement of the present application, the lubrication circulation system further comprises a second shell oil return boss, a second shell oil return groove, an oil return piece accommodation groove and an oil return piece; wherein:

[0026] The second shell oil return boss is arranged at the bottom of the shell support cavity and located outside the crankshaft through hole;

[0027] The second shell oil return groove is arranged between the inner wall of the shell support cavity and the second shell oil return boss, and a plurality of connecting grooves are arranged on the second shell oil return groove, one end of the connecting groove is communicated with the second shell oil return groove, and the other end extends to the position of the first shell oil return boss;

[0028] Gaps are left between the second shell oil return boss and the inner and outer rings of the main bearing to form an inner return flow channel and an outer return flow channel respectively;

[0029] A gap is left between the crankshaft through hole and the crankshaft to form a shell oil return hole; the shell oil return hole is communicated with the inner return flow channel;

[0030] The oil return piece is installed on the side of the main bearing installation and is communicated with the outer return flow channel.

[0031] As a further improvement of the present invention, the lubrication circulation system further includes a plurality of housing airflow channels spaced circumferentially along the inner wall of the housing.

[0032] As a further improvement of the present invention, the lubrication circulation system further includes an oil pump, an adapter, a first crankshaft oil hole, a second crankshaft oil hole, a third crankshaft oil hole, and an oil baffle; wherein:

[0033] The oil pump is placed in the oil sump at the bottom of the compressor and is connected to the lower support through the adapter.

[0034] The second crankshaft oil hole is located at the bottom of the crankshaft and is connected to the outlet of the oil pump component;

[0035] The first crankshaft oil hole is horizontally opened on the crankshaft sidewall and communicates with the second crankshaft oil hole;

[0036] The third crankshaft oil hole is arranged along the crankshaft axis, with its top extending to the bottom of the moving plate and its bottom communicating with the second crankshaft oil hole;

[0037] The oil baffle is sleeved on the outside of the lower support and covers the top of the oil tank;

[0038] The lower support has several support oil return grooves arranged circumferentially along its upper edge; all of the support oil return grooves are arranged in a one-to-one correspondence with all of the housing airflow channels.

[0039] As a further improvement of the present invention, the lubrication circulation system further includes a thrust bearing, a first crankshaft oil hole, a fourth crankshaft oil hole, a fifth crankshaft oil hole, and an oil baffle; wherein:

[0040] The lower end of the crankshaft is connected to the lower bracket via the thrust bearing;

[0041] The fourth crankshaft oil hole is located inside the crankshaft, with its bottom extending to the bottom of the crankshaft and its top extending to the upper part of the crankshaft located in the housing support cavity.

[0042] The first crankshaft oil hole is located on the crankshaft sidewall, with one end connected to the fourth crankshaft oil hole and the other end connected to the auxiliary bearing cavity on the lower bracket.

[0043] The fifth crankshaft oil hole is located on the crankshaft sidewall, with one end connected to the fourth crankshaft oil hole and the other end connected to the housing support cavity.

[0044] The oil baffle is fitted on the outside of the lower support and covers the top of the oil tank.

[0045] The present application can block the refrigerant sucked by the suction port from directly mixing with the lubricating oil in the oil storage cavity, thereby affecting the oil content of the compressor refrigerant and the performance of the compressor; under extreme conditions, the suction port sucks liquid refrigerant, and the oil baffle can effectively block the liquid refrigerant from mixing with the lubricating oil, thereby affecting the lubrication of the compressor and the liquid impact on the scroll disc; when the compressor is running obliquely, the oil baffle can effectively block the lubricating oil in the oil storage cavity from separating from the oil pump, thereby ensuring that the lubricating oil in the oil storage cavity can always immerse the oil pump oil inlet, thereby ensuring that the oil pump can reliably pump oil, solving the problem that the lubricating oil is diluted due to the liquid return of the compressor under harsh environments, thereby affecting the lubrication of the compressor and the liquid return causing a large amount of foam of the lubricating oil, and under extreme conditions, the liquid impact on the scroll disc affects the reliable operation of the compressor.

[0046] The present application provides a kind of compressor, for vertical low pressure cavity scroll compressor, including the lubricating cycle system.

[0047] As a further improvement of the present application, an upper cover is provided, and an oil separation cavity is arranged in the upper cover, the oil separation cavity is communicated with the external environment through an exhaust port; the oil separation cavity is an upwardly inclined structure.

[0048] As a further improvement of the present application, a static disc boss is arranged on the back side of the static disc, which separates the back side of the static disc into a high-pressure cavity, a low-pressure cavity and an oil storage cavity; the upper cover is provided with an upper cover boss for sealing the high-pressure cavity, the low-pressure cavity and the oil storage cavity of the static disc; the upper cover is provided with an oil separation cavity, which is communicated with the oil storage cavity through an upper cover oil return hole; the oil storage cavity is filled with lubricating oil separated in the oil separation cavity of the upper cover. When the compressor is running obliquely, the lubricating oil in the oil storage cavity can cover the oil return hole of the static disc, so that the lubricating oil separated on the high-pressure side of the compressor can flow smoothly to the low-pressure side, and the oil return channel does not produce gas leakage.

[0049] As a further improvement of the present application, the compressor comprises a housing; an oil return member is mounted on the housing, and a part of the lubricating oil in the housing support cavity flows back to the lower cover oil pool through the oil return member; a main bearing is mounted in the housing support cavity, and a gap is left between the inner ring of the main bearing and the first oil return boss of the housing; a small part of the lubricating oil in the housing support cavity flows to the rotor assembly along the crankshaft through the gap below the inner ring of the main bearing; the lubricating oil flowing down along the crankshaft is scattered by the high-speed rotation of the crankshaft rotor assembly, and the scattered lubricating oil is sucked into the scroll disc together with the refrigerant, thereby lubricating the scroll disc.

[0050] As a further improvement of the present application, a plurality of housing airflow channels and a plurality of stator mounting bosses are arranged circumferentially on the housing, and the stator mounting bosses are used for mounting the motor stator; the housing airflow channels are arranged along the axial direction of the housing, and can flow the refrigerant, and at the same time, the housing airflow channels can guide the lubricating oil scattered on the wall surface of the housing to the oil pool below the housing.

[0051] As a further improvement of the present application, the compressor further comprises a lower support, and the lower support is provided with a support oil return groove corresponding to the position of the casing air flow channel, for guiding the lubricating oil on the casing wall surface to the oil pool.

[0052] As a further improvement of the present application, the casing is provided with an air suction port below the motor stator, and the air suction port is located above the lower support, and the lower support is provided with an oil baffle, which can prevent the refrigerant sucked by the air suction port from being directly mixed with the lubricating oil in the oil pool, so as to affect the oil content of the refrigerant in the compressor and the performance of the compressor; under extreme conditions, the air suction port sucks liquid refrigerant, and the oil baffle can effectively prevent the liquid refrigerant from mixing with the lubricating oil, so as to affect the lubrication of the compressor and the liquid impact of the scroll disc; when the compressor is running in an inclined state, the oil baffle can effectively prevent the lubricating oil in the oil pool from being separated from the oil pump, so as to ensure that the lubricating oil in the oil pool can always immerse the pump oil port of the pump oil component, thereby ensuring the reliable pumping of the pump oil component. BRIEF DESCRIPTION OF DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without any creative effort.

[0054] Figure 1 is a sectional structure diagram of one embodiment of the compressor of the present application;

[0055] Figure 2 is a bottom view of one embodiment of the upper cover in the compressor of the present application;

[0056] Figure 3 is a top view of the static disc in the compressor of the present application;

[0057] Figure 4 is a bottom view of the static disc in the compressor of the present application;

[0058] Figure 5 is a top view of one embodiment of the wear-resistant sheet in the compressor of the present application;

[0059] Figure 6 is a top view of one embodiment of the casing in the compressor of the present application;

[0060] Figure 7 is a partial three-dimensional structure diagram of one embodiment of the casing in the compressor of the present application;

[0061] Figure 8 is a structure diagram of one embodiment of the lower support in the compressor of the present application;

[0062] Figure 9Fig. 1 is a structural schematic diagram of an oil baffle in a compressor according to the present application;

[0063] Figure 10 Fig. 2 is a structural schematic diagram of another embodiment of an upper cover in a compressor according to the present application;

[0064] Figure 11 Fig. 3 is a partial structural schematic diagram of another embodiment of a shell in a compressor according to the present application;

[0065] Figure 12 Fig. 4 is a sectional structural diagram of another embodiment of a compressor according to the present application;

[0066] Figure 13 Fig. 5 is a top view of another embodiment of a shell in a compressor according to the present application;

[0067] Figure 14 Fig. 6 is a top view of another embodiment of a wear plate in a compressor according to the present application;

[0068] Figure 15 Fig. 7 is a sectional view of an orbiting scroll in a compressor according to the present application.

[0069] In the diagram: 1. Top cover; 2. Stationary disc; 3. Moving disc; 4. Wear-resistant plate; 5. Housing; 6. Motor stator; 7. Rotor assembly; 8. Crankshaft; 9. Secondary bearing; 10. Lower bracket; 11. Oil baffle; 12. Lower cover; 13. Pump components; 14. Adapter components; 15. Oil return components; 16. Main bearing; 17. Moving disc bearing; 18. Oil filter screen; 19. Oil distribution pipe; 20. Thrust bearing; 21. Sealing component; 22. High-pressure chamber; 23. Low-pressure chamber; 24. Shell support platform; 101, oil distribution chamber; 102, upper cover boss; 103, upper cover oil return hole; 104, upper cover air passage; 201, stationary plate boss; 202, stationary plate groove; 203, stationary plate air passage; 204, inclined oil return hole; 205, oil storage chamber; 206, straight oil return hole; 207, stationary plate side wall; 301, moving plate flange; 302, moving plate oil return countersunk hole; 303, moving plate first oil return hole; 304, moving plate second oil return hole; 401 402. First oil return hole of wear-resistant plate; 403. Air flow hole of wear-resistant plate; 504. Second oil return hole of wear-resistant plate; 505. Housing drainage groove; 506. Oil return component mounting hole; 507. First oil return groove of housing; 508. Main bearing limiting boss; 509. First oil return boss of housing; 5000. Air flow hole of housing; 501. Oil return component clearance groove; 502. Oil return hole of housing; 503. Stator mounting boss; 510. Lower bracket mounting boss; 511. Air return groove of housing. Flow channel; 512, second oil return boss of housing; 513, second oil return groove of housing; 801, first crankshaft oil hole; 802, second crankshaft oil hole; 803, third crankshaft oil hole; 804, fourth crankshaft oil hole; 805, fifth crankshaft oil hole; 1001, lower bracket side wall; 1002, oil return component clearance groove; 1003, oil baffle mounting hole; 1004, bracket oil return groove; 1005, suction clearance groove; 1101, oil baffle oil return component clearance groove. Detailed Implementation

[0070] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0071] like Figures 1-15 As shown, in this embodiment, the present invention provides a compressor lubrication circulation system, comprising:

[0072] Oil storage chamber 205 is located on the back side of stationary plate 2 to store lubricating oil separated from the high-pressure side of the compressor;

[0073] An oil return hole 103 is provided on the upper cover 1 and is connected to the oil distribution chamber 101 and the oil storage chamber 205 respectively, so as to return the lubricating oil separated from the high-pressure side of the compressor to the oil storage chamber 205; an oil filter screen 18 is arranged in the oil return hole 103 to filter the returned lubricating oil; it should be noted that an oil distribution pipe 19 is provided in the oil distribution chamber 101 to separate oil and gas in the exhaust gas;

[0074] The oil return hole of the stationary plate is opened at the bottom of the oil storage cavity 205 and communicates with the housing support cavity to return the lubricating oil in the oil storage cavity 205 to the housing support cavity; it should be noted that the housing support cavity is located at the housing support platform 24.

[0075] When the compressor is tilted, the lubricating oil in the oil reservoir 205 can always cover the oil return hole of the stationary plate.

[0076] Specifically, since the low-pressure chamber of stationary disc 2 is located at the edge, the oil storage chamber 205 is located on the low-pressure chamber side of stationary disc 2, which is also located at the edge of stationary disc 2.

[0077] Furthermore, considering the structural characteristics of the front and back sides of the stationary disc 2, for example, the stationary disc side wall 207 on the front side of the stationary disc 2 is a non-planar structure, and the oil storage cavity 205 is positioned biased towards the center of the stationary disc 2 rather than close to the edge, while the oil return hole on the front side of the stationary disc 2 needs to be close to the edge of the stationary disc 2, in order to facilitate smooth return and convenient installation, in this invention, the stationary disc oil return hole is not vertically arranged, but includes two sections, namely, an inclined oil return hole 204 and a straight oil return hole 206 arranged sequentially; the straight oil return hole 206 is opened at the front edge of the stationary disc 2; one end of the inclined oil return hole 204 is connected to the straight oil return hole 206, and the other end is connected to the bottom of the oil storage cavity 205.

[0078] Specifically, the lubrication circulation system of the present invention is applied in a vertical low-pressure scroll compressor. A stationary plate boss 201 is provided on the back side of the stationary plate, dividing the back side of the stationary plate into a high-pressure chamber 22, a low-pressure chamber 23, and an oil storage chamber 205. The upper cover is provided with an upper cover boss 102 that seals the high-pressure chamber, low-pressure chamber, and oil storage chamber 205 of the stationary plate 2. The upper cover 1 is provided with an oil distribution chamber 101, which communicates with the oil storage chamber 205 of the stationary plate 2 through an upper cover oil return hole 103. The oil storage chamber 205 is filled with lubricating oil separated by the upper cover oil distribution chamber 101. When the compressor is tilted, the lubricating oil in the oil storage chamber can cover the stationary plate oil return hole, thus allowing the lubricating oil separated on the high-pressure side of the compressor to flow smoothly back to the low-pressure side, and preventing cross-flow of air in the oil return channel.

[0079] Furthermore, the upper cover 1 is provided with an upper cover air passage hole 104 for airflow discharge; the stationary plate 2 has a stationary plate groove 202 in the stationary plate boss 201, and a sealing ring is arranged in the inner shell of the stationary plate groove 202 to seal between the cavities; the stationary plate 2 is provided with a stationary plate air passage hole 203 for airflow.

[0080] The compressor lubrication circulation system provided by the application has the advantages that when the compressor is in an inclined operation, the lubricating oil in the oil storage cavity 205 on the static plate 2 can cover the oil return hole of the static plate, so that the lubricating oil separated in the high-pressure cavity 22 of the compressor can flow back to the low-pressure cavity 23 smoothly, and because the lubricating oil always covers the oil return hole of the static plate, the gaseous refrigerant in the oil distribution cavity 101 of the upper cover 1 cannot enter the oil return channel of the pump body assembly, and no gas mixing occurs, thereby solving the problems that when the compressor is in an inclined operation, whether the lubricating oil separated on the high-pressure side of the compressor can flow back to the low-pressure side smoothly and whether the oil return channel is mixed with gas.

[0081] As an optional embodiment of the application, the lubrication circulation system further comprises a wear-resistant sheet first oil return hole 401 arranged on the wear-resistant sheet 4 below the dynamic plate 3; the wear-resistant sheet first oil return hole 401 is arranged opposite to the oil return hole of the static plate, specifically, opposite to the straight oil return hole 206 of the static plate; the lubrication circulation system further comprises a shell drainage groove 501, which is arranged on the shell support table 24 and extends to a position below the wear-resistant sheet first oil return hole 401 at one end and to the top of the shell support cavity at the other end. After the lubricating oil flows out of the straight oil return hole 206 of the static plate, it directly enters the wear-resistant sheet first oil return hole 401, and then is introduced into the shell support cavity through the shell drainage groove 501, so that the gap backflow structure is realized.

[0082] As another optional embodiment of the application, unlike the previous gap backflow structure, in this embodiment, the gap backflow structure is added for backflow; in this embodiment, the lubrication circulation system further comprises a wear-resistant sheet first oil return hole 401 and a wear-resistant sheet second oil return hole 403 arranged on the wear-resistant sheet 4 below the dynamic plate 3; the wear-resistant sheet first oil return hole 401 is arranged opposite to the oil return hole of the static plate, specifically, opposite to the straight oil return hole 206 of the static plate; the lubrication circulation system further comprises a dynamic plate first oil return hole 303 and a dynamic plate second oil return hole 304 arranged on the dynamic plate 3; further, a dynamic plate oil return counterbore 302 is arranged on the dynamic plate flange 301 on the side of the dynamic plate 3 in contact with the wear-resistant sheet 4, the dynamic plate first oil return hole 303 is vertically arranged in the dynamic plate oil return counterbore 302, and one end of the dynamic plate first oil return hole 303 is arranged opposite to the wear-resistant sheet second oil return hole 403 and the other end is in communication with the horizontally arranged dynamic plate second oil return hole 304; the end of the dynamic plate second oil return hole 304 extends into the crankshaft through hole of the dynamic plate 3; in order to facilitate machining, the dynamic plate second oil return hole 304 is drilled horizontally inward through the outer wall of the dynamic plate 3, and in order to prevent the useless section of the hole from being blocked, a plugging member 21 is arranged.

[0083] The lubricating circulation system further comprises a shell drainage groove 501, which is arranged on the shell support table 24 and extends to a position below the wear-resistant sheet first oil return hole 401 at one end and a position below the wear-resistant sheet second oil return hole 403 at the other end. Through the arrangement, the lubricating oil flows into the wear-resistant sheet first oil return hole 401 from the static disc oil return hole, then enters the wear-resistant sheet second oil return hole 403 through the shell drainage groove 501, then enters the dynamic disc oil return sink hole 302, then enters the dynamic disc first oil return hole 303, then enters the crankshaft through hole through the dynamic disc second oil return hole 304, then enters the gap between the crankshaft 8 and the main bearing 16, and finally flows back to the oil pool at the bottom of the shell through the gap between the oil return piece 15 and the crankshaft 8, thereby forming a backflow plus gap backflow structure.

[0084] It should be noted that the wear-resistant sheet 4 in the above two embodiments has a wear-resistant sheet airflow hole 402 for airflow.

[0085] The above two embodiments can be selected and used according to actual needs.

[0086] On the basis of the above structure, the application further makes the following improvements:

[0087] As an optional embodiment of the application, the lubricating circulation system further comprises a shell first oil return boss 505, a shell first oil return groove 503, an oil return piece accommodation groove 507, and an oil return piece 15; wherein:

[0088] The shell first oil return boss 505 is arranged at the bottom of the shell support cavity and between the main bearing limiting boss 504 and the crankshaft through hole;

[0089] The shell first oil return groove 503 is arranged between the inner wall of the shell support cavity and the main bearing limiting boss 504, and a plurality of connecting grooves are arranged on the shell first oil return groove 503, one end of each connecting groove is in communication with the shell first oil return groove 503, and the other end extends to the position of the shell first oil return boss 505, so that most of the lubricating oil in the shell first oil return boss 505 can enter the shell first oil return groove 503;

[0090] The oil return piece accommodation groove 507 is arranged at the bottom of the shell support cavity and is in communication with the shell first oil return boss 505 and the oil return piece 15, respectively. Through the arrangement, the lubricating oil in the shell first oil return groove 503 can smoothly enter the oil return piece 15;

[0091] The oil return piece 15 is installed in the oil return piece mounting hole 502 on the side surface of the main bearing;

[0092] A gap is left between the shell first oil return boss 505 and the inner ring of the main bearing 16 to form a backflow channel;

[0093] The gap between the through hole of the crankshaft and the crankshaft 8 forms a shell oil return hole 508;

[0094] The shell oil return hole 508 is in communication with the return flow channel. It should be noted that the periphery of the shell support table 24 is also provided with a plurality of shell air flow through holes 506 in the circumferential direction.

[0095] Specifically, the compressor shell 5 is provided with a shell drainage groove 501, one end of the shell drainage groove 501 is communicated with the static disc oil return hole through the wear-resistant sheet first oil return hole 401, and the other end of the shell drainage groove 501 leads to the shell support cavity. The shell support cavity is installed with the main bearing 16, the side surface of the main bearing 16 is provided with an oil return piece mounting hole 502 for installing the oil return piece 15, the bottom end of the shell support cavity is provided with a main bearing limiting boss 504 for limiting and supporting the outer ring of the main bearing 16, the bottom end of the shell support cavity is provided with a shell first oil return boss 505, the outer side of the main bearing limiting boss 504 is provided with a shell first oil return groove 503, the shell first oil return groove 503 extends radially to the shell first oil return boss 505, the lubricating oil at the position of the shell first oil return boss 505 is guided to the shell first oil return groove 503, and the oil return piece accommodating groove 507 is arranged at the position of the oil return piece mounting hole 502, which is beneficial to the smooth flow of the lubricating oil in the shell support cavity to the oil return piece 15. The shell first oil return boss 505 has a gap with the inner ring of the main bearing 16. Most of the lubricating oil in the shell support cavity is returned to the oil pool at the bottom of the shell 5 through the oil return piece 15, and a small part of the lubricating oil flows to the shell oil return hole 508 through the gap between the shell first oil return boss 505 and the inner ring of the main bearing 16, and then flows to the rotor assembly 7 along the crankshaft 8. The lubricating oil flowing along the crankshaft 8 is scattered by the high-speed rotation of the crankshaft 8 and the rotor assembly 7, and then the scattered lubricating oil and the refrigerant are sucked into the scroll disc, so as to lubricate the scroll disc. The lubricating oil that is not taken away by the refrigerant is scattered to the wall surface of the shell 5 and then flows to the oil pool below the shell through the shell air flow channel 511.

[0096] Through the above structure, most of the lubricating oil in the shell support cavity is still returned to the oil pool at the bottom of the compressor through the oil return piece, and a small part of the lubricating oil flows to the rotor assembly along the crankshaft through the gap below the inner ring of the main bearing, and then the lubricating oil flowing along the crankshaft is scattered by the high-speed rotation of the crankshaft and the rotor assembly, and then the scattered lubricating oil and the refrigerant are sucked into the scroll disc, so as to lubricate the scroll disc. The problem that the relative position of the lubricating oil level of the compressor relative to the oil pumping piece is affected when the compressor is inclined to run, thereby affecting the oil pumping and lubrication of the compressor.

[0097] In the above embodiment, the main bearing limiting boss 504 is arranged outside the shell first oil return boss 505. It should be noted that the main bearing limiting boss 504 can also not be arranged, such as the following embodiment:

[0098] In the embodiment, the lubricating circulation system further comprises a housing second oil return boss 512, a housing second oil return groove 513, an oil return piece accommodation groove 507 and an oil return piece 15.

[0099] The housing second oil return boss 512 is arranged at the bottom of the housing support cavity and outside the crankshaft through hole.

[0100] The housing second oil return groove 513 is arranged between the inner wall of the housing support cavity and the housing second oil return boss 512, and a plurality of connecting grooves are arranged on the housing second oil return groove 513, one end of each connecting groove is in communication with the housing second oil return groove 513, and the other end extends to the position of the housing second oil return boss 512. Through the above structure, the lubricating oil at the housing second oil return boss 512 can flow into the housing second oil return groove 513 in large quantities.

[0101] Gaps are respectively arranged between the housing second oil return boss 512 and the inner and outer rings of the main bearing 16 to form an inner return flow channel and an outer return flow channel.

[0102] A gap is arranged between the crankshaft through hole and the crankshaft to form a housing oil return hole 508, and the housing oil return hole 508 is in communication with the inner return flow channel.

[0103] The oil return piece 15 is installed in the oil return piece mounting hole 502 on the side surface of the main bearing and is in communication with the outer return flow channel.

[0104] In the embodiment, the housing second oil return boss 512 is a flat surface, and gaps are respectively arranged between the housing second oil return boss 512 and the inner and outer rings of the main bearing 16. The housing second oil return groove 513 of the housing 5 is arranged at the periphery of the housing second oil return boss 512 and extends radially inward, which is beneficial to the smooth guiding of the lubricating oil passing through the bearing to the oil return piece 15.

[0105] It should be noted that the oil return piece 15 is used to return the lubricating oil to the oil pool at the bottom of the housing, and the oil return channel between the oil return piece 15 and the oil pool at the bottom and the structure of the oil return piece 15 are all prior art and are not the main points of the present application, so they will not be described in detail.

[0106] As an optional embodiment of the present application, the lubricating circulation system further comprises a plurality of housing airflow channels 511 which are arranged at intervals along the inner wall of the housing 5. It should be noted that the housing airflow channels 511 are arranged at intervals, and the stator mounting boss 509 and the lower support mounting boss 510 are arranged on the inner wall of the housing 5. In order to avoid blocking the housing airflow channels 511, the stator mounting boss 509 and the lower support mounting boss 510 are both segmented structures to ensure the smoothness of the housing airflow channels 511.

[0107] The above two embodiments can be selected and used according to actual needs.

[0108] As an optional embodiment of the present application, the lubricating circulation system further comprises a pump oil part 13, an adapter part 14, a first crankshaft oil hole 801, a second crankshaft oil hole 802, a third crankshaft oil hole 803, and an oil baffle 11; wherein:

[0109] The pump oil part 13 is arranged in the oil pool at the bottom of the compressor and is connected with the lower support 10 through the adapter part 14 with a through hole, for pumping oil;

[0110] The second crankshaft oil hole 802 is arranged at the bottom of the crankshaft 8 and is communicated with the outlet of the pump oil part 13;

[0111] The first crankshaft oil hole 801 is horizontally arranged on the sidewall of the crankshaft 8 and is communicated with the second crankshaft oil hole 802;

[0112] The third crankshaft oil hole 803 is arranged along the axial direction of the crankshaft 8, the top of which extends to the bottom of the moving disc 3, and the bottom of which is communicated with the second crankshaft oil hole 802;

[0113] The oil baffle 11 is sleeved outside the lower support 10 and covers the top of the oil pool;

[0114] The lower support 10 is provided with a plurality of support oil return grooves 1004 in the circumferential direction; all the support oil return grooves 1004 are arranged in one-to-one correspondence with all the housing airflow channels 511.

[0115] Further, the oil return part accommodation groove 1002 is arranged on the sidewall 1001 of the lower support 10, so as to facilitate the passing of the oil return part 15; the oil baffle 11 is arranged at the bottom of the lower support 10 and is connected with the lower support 10 through the oil baffle mounting hole 1003; the air suction accommodation groove 1005 is further arranged on the lower support 10.

[0116] The oil baffle return part accommodation groove 1101 is arranged at the upper edge of the oil baffle 11, so as to facilitate the passing of the oil return part 15.

[0117] Through the above structure, the lubricating oil entering the lower support 10 can flow back to the oil pool through the support oil return groove 1004.

[0118] The above embodiment is an embodiment in which the pump oil part 13 is arranged in the oil pool; considering that the bearing of the present application is a ball bearing and the demand for lubricating oil is small, the pump oil part 13 can also not be arranged, such as the following embodiment:

[0119] In the present embodiment, the lubricating circulation system further comprises a thrust bearing 20, a first crankshaft oil hole 801, a fourth crankshaft oil hole 804, a fifth crankshaft oil hole 805, and an oil baffle 11; wherein:

[0120] The lower end of the crankshaft 8 is connected with the lower support 10 through the thrust bearing 20;

[0121] The fourth crankshaft oil hole 804 is arranged in the crankshaft 8 and extends to the bottom of the crankshaft 8 at the bottom and extends to the upper part of the crankshaft 8 at the position of the shell support cavity;

[0122] The first crankshaft oil hole 801 is arranged on the side wall of the crankshaft 8 and communicates with the fourth crankshaft oil hole 804 at one end and communicates with the auxiliary bearing cavity on the lower support 10 at the other end; it is to be noted that the auxiliary bearing cavity is used for placing the auxiliary bearing 9.

[0123] The fifth crankshaft oil hole 805 is arranged on the side wall of the crankshaft 8 and communicates with the fourth crankshaft oil hole 804 at one end and communicates with the shell support cavity at the other end; through the above structure, a small part of the backflow lubricating oil enters the fourth crankshaft oil hole 804 through the fifth crankshaft oil hole 805, and then flows out through the first crankshaft oil hole 801 to lubricate the auxiliary bearing 9 and return to the oil pool.

[0124] The oil baffle 11 is sleeved outside the lower support 10 and covers the top of the oil pool.

[0125] The lubricating oil of the shell support cavity returns to the oil pool through the oil return part 15, lubricates the auxiliary bearing 9 and the thrust bearing 20 through the fifth crankshaft oil hole 805, the fourth crankshaft oil hole 804 and the first crankshaft oil hole 801, and flows down along the crankshaft 8 through the gap between the shell oil return hole 508 and the crankshaft 8, is scattered by the rotor assembly 7 of the high-speed rotating crankshaft 8, is carried into the scroll by the refrigerant and is lubricated. The separated lubricating oil of the high-pressure cavity returns to the second shell oil return groove 513 through the static disc oil return hole, and then returns to the upper part of the dynamic disc bearing 17 through the dynamic disc oil return hole (including the dynamic disc oil return counterbore 302, the dynamic disc first oil return hole 303 and the dynamic disc second oil return hole 304) to lubricate the dynamic disc bearing 17 and the moving pairs around it.

[0126] The above two embodiments can be selected and used according to actual needs.

[0127] The oil baffle installed on the lower support can block the refrigerant sucked by the suction port from directly mixing with the lubricating oil in the oil storage cavity, affect the oil content of the compressor refrigerant and thus affect the performance of the compressor; under extreme conditions, the oil baffle can effectively block the liquid refrigerant from mixing with the lubricating oil, thereby affecting the lubrication of the compressor and the liquid entrainment of the suction port causing liquid impact on the scroll; when the compressor is running obliquely, the oil baffle can effectively separate the oil storage lubricating oil from the oil pump, so that the lubricating oil in the oil storage cavity can always immerse the oil pump oil inlet, thereby ensuring reliable oil pumping of the oil pump and solving the problem that the lubricating oil is diluted due to the liquid return of the compressor under harsh environments, thereby affecting the lubrication of the compressor and the liquid return of the lubricating oil causing a large amount of foam, and under extreme conditions, liquid impact on the scroll may occur, affecting the reliable operation of the compressor.

[0128] The application provides a compressor, which is a vertical low-pressure cavity scroll compressor and comprises a lubricating circulation system in any of the above embodiments. Further, the compressor further comprises an upper cover 1, a shell 5, a lower cover 12, a moving disc 3, a stationary disc 2, a motor and a lower support 10.

[0129] As a further improvement of the application, the upper cover 1 is further provided with an oil separation cavity 101, and the oil separation cavity 101 is communicated with the external environment through an exhaust port. In order to prevent the lubricating oil from being discharged through the oil separation pipe 19 when the compressor is inclined, the oil separation cavity 101 is inclined upward in the embodiment.

[0130] When the compressor is running, the refrigerant is sucked in through the shell air inlet, flows into the scroll disc (moving and stationary discs) through the shell airflow channel 511 and the shell airflow through hole 506, is compressed by the scroll disc to form high-temperature and high-pressure gas, is discharged into the high-pressure cavity at the back of the stationary disc 2 through the exhaust hole in the middle of the stationary disc 2, and is discharged through the exhaust hole through the upper cover airflow through hole 104 and the oil separation cavity 101 of the upper cover 1.

[0131] The upper cover 1 of the compressor is provided with an upper cover boss 102, the upper cover boss 102 is matched and installed with the stationary disc boss 201, the upper cover boss 102 separates the upper cover 1 into a high-pressure cavity, a low-pressure cavity and an oil storage cavity 205, the upper cover 1 is provided with an oil separation cavity 101 and an upper cover oil return hole 103, the oil separation cavity 101 is installed with an oil separation pipe 19, and the upper cover oil return hole 103 is installed with a filter screen 18. The high-pressure refrigerant containing lubricating oil is discharged from the compressor through the exhaust hole after being separated through the oil separation pipe 19, and the separated lubricating oil flows into the oil storage cavity 205 of the stationary disc 2 after being filtered of impurities through the filter screen 18.

[0132] The back side of the stationary disc 2 is provided with a stationary disc boss 201, the stationary disc boss 201 separates the back side of the stationary disc 2 into a high-pressure cavity, a low-pressure cavity and an oil storage cavity, the stationary disc boss 201 is provided with a stationary disc groove 202 for installing a sealing ring, the high-pressure cavity, the low-pressure cavity and the oil storage cavity of the stationary disc are sealed and isolated, and the oil storage cavity of the stationary disc 2 is filled with the separated lubricating oil of the oil separation cavity 101 of the upper cover 1. When the compressor is running in an inclined state, the lubricating oil in the oil storage cavity of the stationary disc 2 can cover the stationary disc oil return inclined hole 204, so that the separated lubricating oil on the high-pressure side of the compressor can smoothly flow back to the low-pressure side, and the oil return channel does not produce gas leakage. The stationary disc 2 is provided with a stationary disc airflow through hole 203 for connecting the scroll tooth side low-pressure cavity of the stationary disc 2 with the back side low-pressure cavity of the stationary disc 2. The wear-resistant sheet 4 is installed on the protruding support platform arranged inside the shell 5, the stationary disc side cylinder wall 207 is installed on the wear-resistant sheet 4, the stationary disc side cylinder wall 207 is provided with a stationary disc oil return straight hole 206, and the stationary disc oil return straight hole 206 is communicated with the stationary disc oil return inclined hole 204. The stationary disc oil return hole is composed of the stationary disc oil return inclined hole 204 and the stationary disc oil return straight hole 206.

[0133] Specifically, the compressor further comprises a lower cover 12, the lower cover 12 is capped at the bottom of the shell 5, and an oil pool is located in the lower cover 12; and the compressor further comprises a motor stator 6 arranged in the shell 5 and a rotor assembly 7 connected to the crankshaft 8 on the inner side of the motor stator 6.

[0134] The orbiting scroll 3 is in driving connection with the crankshaft 8 through an orbiting scroll bearing 17.

[0135] The compressor lubrication system is implemented as follows: the compressor stores lubricating oil in an oil storage cavity, the crankshaft 8 drives the pump oil part 13 to pump oil when the compressor is running, the lubricating oil is pumped into a shell support cavity through an oil hole of the crankshaft 8, the lubricating oil realizes lubrication between the crankshaft 8 and the auxiliary bearing 9 through a first crankshaft oil hole 801, the lubricating oil is pumped to the position of the orbiting scroll bearing 17 through a third crankshaft oil hole 803, and the orbiting scroll bearing 17 and the related moving pairs around the orbiting scroll bearing 17 are lubricated; most of the lubricating oil in the shell support cavity is returned to the oil pool at the bottom by the oil return part 15, and a small part of the lubricating oil flows down along the crankshaft 8, is scattered by the high-speed rotating crankshaft 8, is partially scattered together with the refrigerant and is sucked into the scroll to realize lubrication of the scroll, and part of the scattered lubricating oil is returned to the oil pool below the shell through a shell airflow channel 511. The scroll compressed refrigerant containing lubricating oil is separated into oil and gas through an oil separation pipe 19, the separated lubricating oil is returned to the shell support cavity through a stationary scroll oil storage cavity 205 and a stationary scroll oil return hole, is combined with the lubricating oil pumped by the crankshaft 8, and forms a complete lubrication circulation system.

[0136] As a further improvement of the present application, the compressor comprises a shell 5; the shell 5 is provided with an oil return part 15, and most of the lubricating oil in the shell support cavity is returned to the oil pool in the lower cover 12 through the oil return part 15; the shell support cavity is provided with a main bearing 16, and the inner ring of the main bearing 16 is left with a gap with a first oil return boss 505 of the shell, and a small part of the lubricating oil in the shell support cavity flows to the rotor assembly 7 along the crankshaft 8 through the gap below the inner ring of the main bearing 16; the lubricating oil flowing down along the crankshaft 8 is scattered by the high-speed rotating crankshaft 8 and the rotor assembly 7, and the finally scattered lubricating oil is sucked into the scroll together with the refrigerant, thereby lubricating the scroll.

[0137] As a further improvement of the present application, the shell 5 is circumferentially provided with a plurality of shell airflow channels 511 and a plurality of stator mounting bosses 509, and the stator mounting bosses 509 are used for mounting the motor stator 6; the shell airflow channels 511 are arranged along the axial direction of the shell 5 and can flow through the refrigerant, and the shell airflow channels 511 can also guide the scattered lubricating oil on the shell wall to the oil pool below the shell 5.

[0138] As a further improvement of the present application, the compressor further comprises a lower support 10, and the lower support 10 is provided with a support oil return groove 1004 corresponding to the position of the shell airflow channel 511, and the support oil return groove 1004 is used for guiding the lubricating oil on the shell wall to the oil pool.

[0139] As a further improvement of the present application, an air suction port is arranged below the stator assembly in the shell, the air suction port is located above the lower support, and an oil baffle is mounted on the lower support to prevent the refrigerant sucked by the air suction port from directly mixing with the lubricating oil in the oil pool, thereby affecting the oil content of the compressor refrigerant and the performance of the compressor; under extreme conditions, the air suction port sucks liquid refrigerant, and the oil baffle can effectively prevent the liquid refrigerant from mixing with the lubricating oil, thereby affecting the lubrication of the compressor and the liquid carrying of the suction air to the scroll plate; when the compressor is tilted, the oil baffle can effectively separate the oil storage lubricating oil from the oil pump, ensuring that the lubricating oil in the oil pool can always immerse the pump oil port of the pump oil component, thereby ensuring the reliable pumping of the pump oil component.

[0140] First of all, it should be noted that "inward" is the direction towards the center of the accommodation space, and "outward" is the direction away from the center of the accommodation space.

[0141] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. Figure 1

[0142] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined as "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0143] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise specifically limited. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0144] ​In the present disclosure, unless specifically stated and limited otherwise, a first feature "on" or "under" a second feature can be directly in contact with the second feature, or indirectly in contact with the second feature through an intermediate medium. Also, a first feature "over", "above" and "on top of" a second feature can mean the first feature is directly above or obliquely above the second feature, or simply means the first feature is horizontally higher than the second feature. A first feature "under", "below" and "underneath" a second feature can mean the first feature is directly below or obliquely below the second feature, or simply means the first feature is horizontally lower than the second feature.

[0145] In the description of the present disclosure, the description of the terms "one embodiment", "some embodiments", "an example", "a specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the present disclosure, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Also, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples. In addition, different embodiments or examples described in the present disclosure and the features of different embodiments or examples can be combined and combined by those skilled in the art without contradiction.

[0146] The above description is merely specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present disclosure, which should be covered by the protection scope of the present disclosure. Therefore, the protection scope of the present disclosure should be subject to the protection scope of the claims.

Claims

1. A compressor lubrication circulation system, characterized in that, include: An oil storage chamber is located on the back side of the stationary plate to store the lubricating oil separated from the high-pressure side of the compressor. An oil return hole is provided on the top cover and is connected to the oil distribution chamber and the oil storage chamber respectively, so as to return the lubricating oil separated from the high-pressure side of the compressor to the oil storage chamber. The static plate return oil hole is opened at the bottom of the oil storage cavity and communicates with the housing support cavity to return the lubricating oil in the oil storage cavity to the housing support cavity; When the compressor is tilted, the lubricating oil in the oil storage chamber can always cover the oil return hole of the stationary plate; The lubrication circulation system further includes a first oil return boss on the housing, a first oil return groove on the housing, a clearance groove for the oil return component, and an oil return component; wherein: The first oil return boss of the housing is located at the bottom of the housing support cavity and between the main bearing limiting boss and the crankshaft through hole; The first oil return groove of the housing is disposed between the inner wall of the housing support cavity and the main bearing limiting boss, and the first oil return groove of the housing has a plurality of connecting grooves, one end of the connecting groove is connected to the first oil return groove of the housing, and the other end extends to the position of the first oil return boss of the housing. The oil return component clearance groove is located at the bottom of the housing support cavity and is connected to the first oil return boss of the housing and the oil return component respectively; The oil return component is installed on the side of the main bearing mounting; A gap is left between the first oil return boss of the housing and the inner ring of the main bearing to form a return channel; A gap is left between the crankshaft through-hole and the crankshaft to form the housing oil return hole; The oil return hole of the housing is connected to the return channel.

2. The lubrication circulation system according to claim 1, characterized in that, The oil storage chamber is located on the low-pressure side of the stationary plate.

3. The lubrication circulation system according to claim 1, characterized in that, The oil return hole of the stationary plate includes an inclined oil return hole and a straight oil return hole arranged in sequence; the straight oil return hole is opened at the front edge of the stationary plate; one end of the inclined oil return hole is connected to the straight oil return hole, and the other end is connected to the bottom of the oil storage cavity.

4. The lubrication circulation system according to claim 1, characterized in that, The lubrication circulation system also includes a first oil return hole for the wear-resistant plate located on the wear-resistant plate below the moving plate; the first oil return hole for the wear-resistant plate is positioned opposite to the oil return hole for the stationary plate; the lubrication circulation system also includes a housing drainage groove, which is opened on the housing support platform, with one end extending to the position below the first oil return hole for the wear-resistant plate and the other end extending to the top of the housing support cavity.

5. The lubrication circulation system according to claim 1, characterized in that, The lubrication circulation system further includes a first oil return hole and a second oil return hole for the wear-resistant plate located on the wear-resistant plate below the moving disk; the first oil return hole for the wear-resistant plate is directly opposite the oil return hole for the stationary disk; the lubrication circulation system further includes a first oil return hole and a second oil return hole for the moving disk located on the moving disk; the first oil return hole for the moving disk is vertically arranged, with one end directly opposite the second oil return hole for the wear-resistant plate, and the other end communicating with the horizontally arranged second oil return hole for the moving disk; the end of the second oil return hole for the moving disk extends into the crankshaft through hole of the moving disk; the lubrication circulation system further includes a housing drainage groove, which is formed on the housing support platform, with one end extending below the first oil return hole for the wear-resistant plate and the other end extending below the second oil return hole for the wear-resistant plate.

6. The lubrication circulation system according to claim 4 or 5, characterized in that, The lubrication circulation system also includes several housing airflow channels spaced circumferentially along the inner wall of the housing.

7. The lubrication circulation system according to claim 6, characterized in that, The lubrication circulation system further includes an oil pump, a connector, a first crankshaft oil hole, a second crankshaft oil hole, a third crankshaft oil hole, and an oil baffle; wherein: The oil pump is placed in the oil sump at the bottom of the compressor and is connected to the lower support through the adapter. The second crankshaft oil hole is located at the bottom of the crankshaft and is connected to the outlet of the oil pump component; The first crankshaft oil hole is horizontally opened on the crankshaft sidewall and communicates with the second crankshaft oil hole; The third crankshaft oil hole is arranged along the crankshaft axis, with its top extending to the bottom of the moving plate and its bottom communicating with the second crankshaft oil hole; The oil baffle is sleeved on the outside of the lower support and covers the top of the oil tank; The lower support has several support oil return grooves arranged circumferentially along its upper edge; all of the support oil return grooves are arranged in a one-to-one correspondence with all of the housing airflow channels.

8. The lubrication circulation system according to claim 4 or 5, characterized in that, The lubrication circulation system further includes a thrust bearing, a first crankshaft oil hole, a fourth crankshaft oil hole, a fifth crankshaft oil hole, and an oil baffle; wherein: The lower end of the crankshaft is connected to the lower bracket via the thrust bearing; The fourth crankshaft oil hole is located inside the crankshaft, with its bottom extending to the bottom of the crankshaft and its top extending to the upper part of the crankshaft located in the housing support cavity. The first crankshaft oil hole is located on the crankshaft sidewall, with one end connected to the fourth crankshaft oil hole and the other end connected to the auxiliary bearing cavity on the lower bracket. The fifth crankshaft oil hole is located on the crankshaft sidewall, with one end connected to the fourth crankshaft oil hole and the other end connected to the housing support cavity. The oil baffle is fitted on the outside of the lower support and covers the top of the oil tank.

9. A compressor lubrication circulation system, characterized in that, include: An oil storage chamber is located on the back side of the stationary plate to store the lubricating oil separated from the high-pressure side of the compressor. An oil return hole is provided on the top cover and is connected to the oil distribution chamber and the oil storage chamber respectively, so as to return the lubricating oil separated from the high-pressure side of the compressor to the oil storage chamber. The static plate return oil hole is opened at the bottom of the oil storage cavity and communicates with the housing support cavity to return the lubricating oil in the oil storage cavity to the housing support cavity; When the compressor is tilted, the lubricating oil in the oil storage chamber can always cover the oil return hole of the stationary plate; The lubrication circulation system further includes a second oil return boss on the housing, a second oil return groove on the housing, a clearance groove for the oil return component, and an oil return component; wherein: The second oil return boss of the housing is located at the bottom of the housing support cavity and is located outside the crankshaft through hole; The second oil return groove of the housing is disposed between the inner wall of the housing support cavity and the second oil return boss of the housing, and the second oil return groove of the housing has a plurality of connecting grooves, one end of the connecting groove is connected to the second oil return groove of the housing, and the other end extends to the position of the first oil return boss of the housing; The second oil return boss of the housing is provided with a gap between itself and the inner and outer rings of the main bearing to form an inner return channel and an outer return channel, respectively. A gap is left between the crankshaft through-hole and the crankshaft to form a housing oil return hole; the housing oil return hole is connected to the internal return channel; The oil return component is installed on the side of the main bearing and is connected to the external return channel.

10. The lubrication circulation system according to claim 9, characterized in that, The oil storage chamber is located on the low-pressure side of the stationary plate.

11. The lubrication circulation system according to claim 9, characterized in that, The oil return hole of the stationary plate includes an inclined oil return hole and a straight oil return hole arranged in sequence; the straight oil return hole is opened at the front edge of the stationary plate; one end of the inclined oil return hole is connected to the straight oil return hole, and the other end is connected to the bottom of the oil storage cavity.

12. The lubrication circulation system according to claim 9, characterized in that, The lubrication circulation system also includes a first oil return hole for the wear-resistant plate located on the wear-resistant plate below the moving plate; the first oil return hole for the wear-resistant plate is positioned opposite to the oil return hole for the stationary plate; the lubrication circulation system also includes a housing drainage groove, which is opened on the housing support platform, with one end extending to the position below the first oil return hole for the wear-resistant plate and the other end extending to the top of the housing support cavity.

13. The lubrication circulation system according to claim 9, characterized in that, The lubrication circulation system further includes a first oil return hole and a second oil return hole for the wear-resistant plate located on the wear-resistant plate below the moving disk; the first oil return hole for the wear-resistant plate is directly opposite the oil return hole for the stationary disk; the lubrication circulation system further includes a first oil return hole and a second oil return hole for the moving disk located on the moving disk; the first oil return hole for the moving disk is vertically arranged, with one end directly opposite the second oil return hole for the wear-resistant plate, and the other end communicating with the horizontally arranged second oil return hole for the moving disk; the end of the second oil return hole for the moving disk extends into the crankshaft through hole of the moving disk; the lubrication circulation system further includes a housing drainage groove, which is formed on the housing support platform, with one end extending below the first oil return hole for the wear-resistant plate and the other end extending below the second oil return hole for the wear-resistant plate.

14. The lubrication circulation system according to claim 12 or 13, characterized in that, The lubrication circulation system also includes several housing airflow channels spaced circumferentially along the inner wall of the housing.

15. The lubrication circulation system according to claim 14, characterized in that, The lubrication circulation system further includes an oil pump, a connector, a first crankshaft oil hole, a second crankshaft oil hole, a third crankshaft oil hole, and an oil baffle; wherein: The oil pump is placed in the oil sump at the bottom of the compressor and is connected to the lower support through the adapter. The second crankshaft oil hole is located at the bottom of the crankshaft and is connected to the outlet of the oil pump component; The first crankshaft oil hole is horizontally opened on the crankshaft sidewall and communicates with the second crankshaft oil hole; The third crankshaft oil hole is arranged along the crankshaft axis, with its top extending to the bottom of the moving plate and its bottom communicating with the second crankshaft oil hole; The oil baffle is sleeved on the outside of the lower support and covers the top of the oil tank; The lower support has several support oil return grooves arranged circumferentially along its upper edge; all of the support oil return grooves are arranged in a one-to-one correspondence with all of the housing airflow channels.

16. The lubrication circulation system according to claim 12 or 13, characterized in that, The lubrication circulation system further includes a thrust bearing, a first crankshaft oil hole, a fourth crankshaft oil hole, a fifth crankshaft oil hole, and an oil baffle; wherein: The lower end of the crankshaft is connected to the lower bracket via the thrust bearing; The fourth crankshaft oil hole is located inside the crankshaft, with its bottom extending to the bottom of the crankshaft and its top extending to the upper part of the crankshaft located in the housing support cavity. The first crankshaft oil hole is located on the crankshaft sidewall, with one end connected to the fourth crankshaft oil hole and the other end connected to the auxiliary bearing cavity on the lower bracket. The fifth crankshaft oil hole is located on the crankshaft sidewall, with one end connected to the fourth crankshaft oil hole and the other end connected to the housing support cavity. The oil baffle is fitted on the outside of the lower support and covers the top of the oil tank.

17. A compressor, characterized in that, It is a vertical low-pressure chamber scroll compressor, including the lubrication circulation system as described in any of claims 1-8 or 9-16.

18. The compressor according to claim 17, characterized in that, It also includes an upper cover, which has an oil distribution chamber inside. The oil distribution chamber is connected to the external environment through an exhaust port. The oil distribution chamber has an upward-sloping structure.

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