CN108412772B

CN108412772B - Pump body subassembly and compressor and air conditioner

Info

Publication number: CN108412772B
Application number: CN201810343647.2A
Authority: CN
Inventors: 熊指挥; 孙腾
Original assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Landa Compressor Co Ltd
Current assignee: Gree Electric Appliances Inc of Zhuhai; Zhuhai Landa Compressor Co Ltd
Priority date: 2018-04-17
Filing date: 2018-04-17
Publication date: 2022-01-04
Anticipated expiration: 2038-04-17
Also published as: CN108412772A

Abstract

The invention provides a pump body assembly, a compressor and an air conditioner, wherein the pump body assembly comprises: the device comprises a crankshaft, an upper flange, a cylinder, a roller and a lower flange; the upper flange is provided with a first mounting hole, the roller is provided with a second mounting hole, the lower flange is provided with a third mounting hole, two ends of the third mounting hole are respectively an open end and a closed end, the crankshaft sequentially passes through the first mounting hole and the second mounting hole and then extends into the third mounting hole from the open end, and an oil return cavity allowing lubricating oil to enter is formed between the crankshaft and the closed end of the third mounting hole; the middle part of the crankshaft is provided with an oil return channel which can be communicated with the oil return cavity and extends along the axial direction of the crankshaft, and lubricating oil in the oil return cavity can be conveyed to the first mounting hole, the second mounting hole and the third mounting hole through the oil return channel. The invention has the advantages of reasonable design, simple structure, lubricating effect guarantee, oil injection amount reduction and oil waste avoidance.

Description

Pump body subassembly and compressor and air conditioner

Technical Field

The invention relates to the technical field of household appliances, in particular to a pump body assembly, a compressor and an air conditioner.

Background

At present, a main oil way and an oil hole communicated with the main oil way are arranged on a crankshaft, the main oil way is connected with an oil pool at the bottom of a compressor, lubricating oil in the oil pool is conveyed to the main oil way through an oil guide sheet, and then the lubricating oil can flow out through the oil hole, so that oil supply lubrication is carried out on a roller in the compressor. The position of this kind of structure oil bath is lower relatively, when the oil mass is not enough or the oil level height is not enough, can appear leading the decline of oil sheet fuel feeding ability, and then influences the lubricated effect of compressor, consequently need inject a large amount of lubricating oil into the oil bath in-service use, cause the oil of certain degree extravagant.

Disclosure of Invention

The invention mainly aims to provide a pump body assembly, a compressor and an air conditioner, which are reasonable in design and simple in structure, can ensure a lubricating effect, reduce the oil injection amount and avoid oil waste.

The invention provides a pump body assembly, comprising: the device comprises a crankshaft, an upper flange, a cylinder, a roller and a lower flange;

the upper flange is provided with a first mounting hole, the roller is provided with a second mounting hole, the lower flange is provided with a third mounting hole, two ends of the third mounting hole are respectively an open end and a closed end, the roller is arranged in the cylinder, and the cylinder is arranged between the upper flange and the lower flange;

the crankshaft is vertically arranged, penetrates through the first mounting hole and the second mounting hole in sequence, extends into the third mounting hole from the opening end, and forms an oil return cavity allowing lubricating oil to enter between the crankshaft and the closed end of the third mounting hole;

the bent axle middle part be provided with can with oil return chamber intercommunication and follow the axial extension's of bent axle oil return passageway, work as when the bent axle is rotatory, lubricating oil in the oil return intracavity can be carried to through oil return passageway first mounting hole the second mounting hole with in the third mounting hole.

Preferably, an oil sump for storing lubricating oil is arranged on the upper flange, the lubricating oil in the oil sump can be conveyed to the first mounting hole, the second mounting hole and the third mounting hole, and the lubricating oil entering the third mounting hole can flow into the oil return cavity.

Preferably, the side wall of the crankshaft is provided with an oil return hole communicated with the oil return channel, and when the crankshaft rotates, lubricating oil in the oil return cavity can sequentially flow into the oil pool through the oil return channel and the oil return hole.

Preferably, the number of the oil return holes is at least two, and the at least two oil return holes are sequentially distributed along the circumferential direction of the crankshaft.

Preferably, the upper flange is provided with a first end face and a second end face which are opposite to each other, the upper flange is abutted to the cylinder through the second end face, and the oil pool is arranged on the first end face.

Preferably, the upper flange is provided with an oil supply channel and an oil storage groove positioned on the second end face;

two ends of the oil supply channel are respectively connected with the oil pool and the oil storage groove, so that lubricating oil in the oil pool can enter the oil storage groove through the oil supply channel;

the oil storage groove can be communicated with the first mounting hole and the second mounting hole, so that lubricating oil in the oil storage groove can flow into the first mounting hole and the second mounting hole, and the second mounting hole is communicated with the third mounting hole, so that the lubricating oil in the oil storage groove can enter the third mounting hole through the second mounting hole.

Preferably, the oil trap groove is cylindrical and coaxial with the first mounting hole.

Preferably, the number of the oil supply passages is at least two, and the at least two oil supply passages are arranged in a circular array with the axis of the first mounting hole as the center.

Preferably, the part of the crankshaft located in the second mounting hole is an eccentric part, and a first groove extending along the axial direction of the second mounting hole is arranged on the surface of the eccentric part, so that the lubricating oil entering the second mounting hole can flow towards the third mounting hole along the first groove.

Preferably, the exhaust baffle plate is arranged between the upper flange and the cylinder, a fourth mounting hole is formed in the exhaust baffle plate, the exhaust baffle plate is sleeved on the crankshaft through the fourth mounting hole, the oil storage groove can be communicated with the fourth mounting hole, and the fourth mounting hole is communicated with the second mounting hole, so that lubricating oil in the oil storage groove can flow into the second mounting hole through the fourth mounting hole.

Preferably, a second groove extending along the axis of the fourth mounting hole is formed in the inner wall of the fourth mounting hole, so that the lubricating oil entering the fourth mounting hole can flow towards the second mounting hole along the second groove.

Preferably, a first spiral groove is formed in the inner wall of the first mounting hole, and when the crankshaft rotates, lubricating oil entering the first mounting hole can be driven to move towards the direction far away from the second end face along the first spiral groove.

Preferably, the lower flange is provided with a third end face facing the roller, a second spiral groove is formed in the inner wall of the third mounting hole, and when the crankshaft rotates, lubricating oil entering the third mounting hole can be driven to move towards the direction far away from the third end face along the second spiral groove.

Preferably, an oil guide sheet is arranged in the oil return passage, and when the crankshaft rotates, the oil guide sheet can drive lubricating oil entering the oil return passage to flow towards the oil return hole.

In a further aspect the present invention provides a compressor including a pump body assembly according to any of the features above the housing.

Preferably, the device also comprises an exhaust pipe;

the pump body assembly is arranged in the shell, and the exhaust pipe penetrates through the side wall of the shell and can be communicated with the cylinder in the pump body assembly, so that the refrigerant compressed in the cylinder can be discharged through the exhaust pipe.

Preferably, a first exhaust hole is formed in a side wall of the cylinder, and the exhaust pipe is connected to the first exhaust hole.

Preferably, when the pump body subassembly includes the exhaust baffle, be provided with on the exhaust baffle can with the exhaust chamber of cylinder intercommunication be provided with the second exhaust hole on the lateral wall in exhaust chamber, the blast pipe is connected on the second exhaust hole.

Preferably, the peripheral wall of the upper flange is hermetically connected with the inner wall of the housing, so that a high-pressure cavity is formed between the upper flange and the bottom wall of the housing, the high-pressure cavity can be communicated with the cylinder, so that a refrigerant compressed in the cylinder can enter the high-pressure cavity, and one end of the exhaust pipe extends into the high-pressure cavity.

Preferably, the peripheral wall of the upper flange is welded to the inner wall of the housing.

Preferably, the device further comprises a sealing component;

the sealing member is provided between the outer peripheral wall of the upper flange and the inner wall of the housing to seal a gap between the outer peripheral wall of the upper flange and the inner wall of the housing.

Preferably, the cylinder has a fourth end face, the lower flange abuts against the fourth end face, a slide groove is formed in the inner wall of the cylinder, a port is formed in the slide groove on the fourth end face, and at least part of the port is located outside the abutting range of the lower flange.

Preferably, the oil-well structure also comprises an oil discharge pipe;

the bottom of casing is provided with the oil drain hole, the oil extraction union coupling be in on the oil drain hole, make the lubricating oil of casing bottom can pass through the oil extraction pipe discharges.

In a further aspect the invention provides an air conditioner including a compressor of any of the features.

According to the pump body assembly provided by the invention, when the crankshaft extends into the third mounting hole, an oil return cavity allowing lubricating oil to enter is formed between the crankshaft and the closed end of the third mounting hole, the middle part of the crankshaft is provided with an oil return channel which can be communicated with the oil return cavity and extends along the axial direction of the crankshaft, and when the crankshaft rotates, the lubricating oil in the oil return cavity can be conveyed into the first mounting hole, the second mounting hole and the third mounting hole through the oil return channel.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic structural diagram of a pump body assembly according to a first embodiment;

FIG. 2 is a schematic view of the FIG. 1 construction without the exhaust baffle;

FIG. 3 is a schematic illustration of the crankshaft of FIG. 1;

FIG. 4 is a schematic view of the upper flange of FIG. 1;

FIG. 5 is a schematic view of the lower flange of FIG. 1;

FIG. 6 is a schematic view of the exhaust baffle of FIG. 1;

FIG. 7 is a schematic view of a compressor in the second embodiment;

FIG. 8 is a schematic view of the pump body assembly of FIG. 7 without the exhaust baffle;

fig. 9 is a schematic view of another arrangement of the exhaust pipe of fig. 7.

In the figure: 1. a crankshaft; 11. an oil return passage; 12. an oil return hole; 13. an eccentric portion; 14. a first groove; 15. an oil guide sheet; 2. an upper flange; 21. a first mounting hole; 22. an oil sump; 23. a first end face; 24. a second end face; 25. an oil supply passage; 26. an oil storage groove; 27. a first helical groove; 3. a cylinder; 31. a first exhaust port; 32. a fourth end face; 33. a slide groove; 34. a port; 4. a roller; 41. a second mounting hole; 5. a lower flange; 51. a third mounting hole; 52. an open end; 53. a closed end; 54. an oil return cavity; 55. a third end face; 56. a second helical groove; 6. an exhaust separator plate; 61. a fourth mounting hole; 62. a second groove; 63. an exhaust chamber; 64. a second vent hole; 65. an air intake passage; 7. a housing; 71. a high pressure chamber; 72. an oil discharge pipe; 8. an exhaust pipe; 9. and a pump body assembly.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein.

Example one

As shown in fig. 1 and 2, a pump body assembly includes: crankshaft 1, upper flange 2, cylinder 3, roller 4 and lower flange 5. The upper flange 2 has a first mounting hole 21, the roller 4 has a second mounting hole 41, the lower flange 5 has a third mounting hole 51, the two ends of the third mounting hole 51 are respectively an open end 52 and a closed end 53, the roller 4 is arranged in the cylinder 3, and the cylinder 3 is arranged between the upper flange 2 and the lower flange 5. The closed end 53 may be integrally formed by casting or the like, or may be formed by plugging one end of the third mounting hole 51 away from the open end 52. The crankshaft 1 is vertically arranged, the crankshaft 1 sequentially passes through the first mounting hole 21 and the second mounting hole 41, the open end 52 extends into the third mounting hole 51, and an oil return cavity 54 allowing lubricating oil to enter is formed between the open end 52 and the closed end 53 of the third mounting hole 51. The crankshaft 1 is provided at a middle portion thereof with an oil return passage 11 capable of communicating with the oil return chamber 54 and extending in an axial direction of the crankshaft 1, and when the crankshaft 1 rotates, the lubricating oil in the oil return chamber 54 can be delivered to the first mounting hole 21, the second mounting hole 41, and the third mounting hole 51 through the oil return passage 11.

When crankshaft 1 is rotatory, can drive the lubricating oil in the oil return chamber 54 along oil return channel 11 upward movement through the centrifugal force effect, in order to carry the lubricating oil in the oil return chamber 54 to first mounting hole 21 through oil return channel 11, in second mounting hole 41 and the third mounting hole 51, oil return chamber 54's position is higher relatively for prior art, consequently, oil return channel 11 upwards pump oily formation shortens relatively, only need to be full of lubricating oil in the oil return chamber just can reach lubricated requirement, simultaneously because oil return chamber 54's volume is less relatively, consequently, the pump body subassembly in this embodiment can guarantee lubricated effect, the oiling volume has been reduced again simultaneously, avoid causing the oil extravagant.

Further, as shown in fig. 1, 2 and 4, an oil sump 22 for storing lubricating oil is provided on the upper flange 2, the lubricating oil in the oil sump 22 can be delivered to the first mounting hole 21, the second mounting hole 41 and the third mounting hole 51, the lubricating oil entering the third mounting hole 51 can flow into the oil return cavity 54, an oil return hole 12 communicating with the oil return channel 11 is provided on the side wall of the crankshaft 1, and the lubricating oil in the oil return cavity 54 can flow into the oil sump 22 through the oil return channel 11 and the oil return hole 12 in sequence when the crankshaft 1 rotates. Thus, when the crankshaft 1 rotates, the lubricating oil return passage 11 in the oil return chamber 54 can be driven by centrifugal force to flow upward and flow out of the oil return hole 12 into the oil return chamber 54. Since the height of the upward flow of the lubricating oil from the lower end of the oil return passage 11 is not too high during oil return, the oil return hole 12 only needs to be set at a position higher than the oil sump 22. It should be noted that the number of the oil return holes 12 may be at least two, and at least two oil return holes 12 are sequentially arranged along the circumferential direction of the crankshaft 1. So that the lubricating oil in the oil return passage 11 can smoothly flow out. Specifically, as shown in the figure, the upper flange 2 has a first end face 23 and a second end face 24 which are opposite to each other, the upper flange 2 abuts on the cylinder 3 through the second end face 24, and the oil sump 22 is provided on the first end face 23. With this configuration, the first oil pool 22 can be positioned higher than the rollers 4 and the lower flange 5, and at this time, the first oil pool 22 can flow toward the second mounting hole 41 and the third mounting hole 51 by the action of gravity.

In practical production, as shown in fig. 1, 2 and 4, the upper flange 2 is provided with an oil supply channel 25 and an oil storage groove 26 on the second end surface 24. Both ends of the oil supply passage 25 are connected to the oil sump 22 and the oil storage groove 26, respectively, so that the lubricating oil in the oil sump 22 can enter the oil storage groove 26 through the oil supply passage 25. The oil reservoir groove 26 can communicate with the first mounting hole 21 and the second mounting hole 41 to allow the lubricating oil in the oil reservoir groove 26 to flow into the first mounting hole 21 and the second mounting hole 41, and the second mounting hole 41 communicates with the third mounting hole 51 to allow the lubricating oil in the oil reservoir groove 26 to enter the third mounting hole 51 through the second mounting hole 41. This ensures that the lubricating oil in the oil reservoir groove 26 can smoothly flow to the first mounting hole 21, the second mounting hole 41, and the third mounting hole 51, thereby ensuring a lubricating effect between the outer wall of the crankshaft 1 and the inner walls of the first mounting hole 21, the second mounting hole 41, and the third mounting hole 51.

Specifically, as shown in fig. 4, the oil reservoir groove 26 is cylindrical coaxially with the first mounting hole 21. The oil retaining groove 26 forms a stepped hole together with the first mounting hole 21 at this time. Preferably, as shown in fig. 4, a first spiral groove 27 is provided on the inner wall of the first mounting hole 21, so that when the crankshaft 1 rotates, the lubricating oil that can be brought into the first mounting hole 21 can move along the first spiral groove 27 toward a direction away from the second end surface 24 (i.e., an upward direction), which can ensure a lubricating effect between the inner wall of the first mounting hole 21 and the outer wall of the crankshaft 1. More preferably, the number of the oil supply passages 25 is at least two, and the at least two oil supply passages 25 may be arranged in a circular array centered on the axis of the first mounting hole 21, but is not limited thereto, and any arrangement may be adopted to achieve the object of the invention. The oil storage groove 26 is communicated with the oil pool 22 through the two oil supply channels 25, so that the oil pool 22 can supply sufficient oil to the oil storage groove 26, the oil storage groove 26 can supply sufficient lubricating oil to the first mounting hole 21, the second mounting hole 41 and the third mounting hole 51, and the lubricating effect is further ensured.

Preferably, as shown in fig. 5, the lower flange 5 has a third end face 55 facing the roller 4, and a second spiral groove 56 is provided on the inner wall of the third mounting hole 51, so that when the crankshaft 1 rotates, the lubricating oil that can be brought into the third mounting hole 51 can move along the second spiral groove 56 in a direction away from the third end face 55 (i.e., downward direction). This ensures a lubricating effect between the inner wall of the third mounting hole 51 and the outer wall of the crankshaft 1, and also enables the lubricating oil entering the third mounting hole 51 to smoothly flow back to the oil return chamber 54.

As an embodiment, as shown in fig. 1, 2 and 3, the portion of the crankshaft 1 located in the second mounting hole 41 is an eccentric portion 13, and a first groove 14 extending in the axial direction of the second mounting hole 41 is provided on the surface of the eccentric portion 13, so that the lubricating oil entering the second mounting hole 41 can flow toward the third mounting hole 51 along the first groove 14. Therefore, the lubricating oil entering the second mounting hole 41 can smoothly flow along the first groove 14, so that the oil amount flowing to the third mounting hole 51 through the second mounting hole 41 is ensured, and the lubricating effect on the inner wall of the third mounting hole 51 and the oil return effect of the oil return cavity 54 are ensured.

As an implementation mode, as shown in fig. 1 and 6, the crankshaft assembly further includes an exhaust partition plate 6 disposed between the upper flange 2 and the cylinder 3, the exhaust partition plate 6 has a fourth mounting hole 61 and is sleeved on the crankshaft 1 through the fourth mounting hole 61, the oil storage groove 26 can communicate with the fourth mounting hole 61, and the fourth mounting hole 61 communicates with the second mounting hole 41, so that the lubricating oil in the oil storage groove 26 can flow into the second mounting hole 41 through the fourth mounting hole 61. Further, as shown in fig. 6, a second groove 62 extending along the axis of the fourth mounting hole 61 is provided on the inner wall of the fourth mounting hole 61, so that the lubricating oil entering the fourth mounting hole 61 can flow toward the second mounting hole 41 along the second groove 62. Thus, lubricating oil entering the fourth mounting hole 61 can smoothly flow along the second groove 62, so that the oil amount flowing to the second mounting hole 41 through the fourth mounting hole 61 is ensured, and the lubricating effect on the inner walls of the second mounting hole 41 and the third mounting hole 51 and the oil return effect of the oil return cavity 54 are ensured.

As an embodiment, as shown in fig. 1, an oil guide plate 15 is provided in the oil return passage 11, and when the crankshaft 1 rotates, the oil guide plate 15 can drive the lubricating oil entering the oil return passage 11 to flow toward the oil return hole 12 (upward). This enables the oil pumping capacity of the crankshaft 1 to be significantly improved.

Example two

As shown in fig. 7, 8 and 9, a compressor includes a housing 7, a discharge pipe 8 and a pump assembly 9, wherein the pump assembly 9 is the pump assembly described in the first embodiment. The pump assembly 9 is disposed in the housing 7, and the exhaust pipe 8 is disposed through a sidewall of the housing 7 and can communicate with the cylinder 3 in the pump assembly 9, so that the refrigerant compressed in the cylinder 3 can be discharged through the exhaust pipe 8. Further, as shown in the drawing, an oil drain pipe 72 is further included, and an oil drain hole (not shown) is provided in the bottom of the housing 7, and the oil drain pipe 72 is connected to the oil drain hole so that the lubricating oil in the bottom of the housing 7 can be drained through the oil drain pipe 72. Wherein the oil drain pipe 72 is connectable to a passage of a refrigeration cycle in which the compressor is located, so that the lubricant oil accumulated in the bottom of the casing 7 can be introduced into the refrigeration cycle through the oil drain pipe 72.

In actual manufacturing, a specific connection position of the exhaust pipe 8 may be, as shown in fig. 8, a first exhaust hole 31 is provided in a side wall of the cylinder 3, and the exhaust pipe 8 is connected to the first exhaust hole 31.

As an embodiment, as shown in fig. 7, when the pump body assembly 9 includes the exhaust partition plate 6, the exhaust partition plate 6 is provided with an exhaust cavity 63 capable of communicating with the cylinder 3, a second exhaust hole 64 is provided on a side wall of the exhaust cavity 63, and the exhaust pipe 8 is connected to the second exhaust hole 64.

As an implementation manner, as shown in fig. 9, the outer peripheral wall of the upper flange 2 is hermetically connected with the inner wall of the housing 7, so that a high-pressure cavity 71 is formed between the upper flange 2 and the bottom wall of the housing 7, wherein the high-pressure cavity 71 can be communicated with the cylinder 3, so that the high-pressure refrigerant compressed in the cylinder 3 can enter the high-pressure cavity 71, in this case, the exhaust pipe 8 may adopt another arrangement manner, that is, one end of the exhaust pipe 8 directly extends into the high-pressure cavity 71. In this case, the position of the exhaust pipe 8 is not limited to this, and the two types of arrangement described above may be adopted.

Wherein the sealing connection between the peripheral wall of the upper flange 2 and the inner wall of the housing 7 can be realized by welding the peripheral wall of the upper flange 2 on the inner wall of the housing 7. It is also possible to adopt a structure further comprising a sealing member (not shown); a sealing member, which may be an O-ring, is provided between the outer circumferential wall of the upper flange 2 and the inner wall of the housing 7 to seal a gap between the outer circumferential wall of the upper flange 2 and the inner wall of the housing 7. The high pressure chamber 71 may be formed as shown in fig. 9, the cylinder 3 has a fourth end surface 32, the lower flange 5 abuts on the fourth end surface 32, a slide groove 33 is provided on the inner wall of the cylinder 3, the slide groove 33 forms a port 34 on the fourth end surface 32, and the port 34 is at least partially located outside the abutting range of the lower flange 5. In this way, the cylinder 3 can communicate with the space at the bottom of the housing through the vane groove 33 to form the high pressure chamber 71, and after the high pressure chamber 71 is formed, the lower flange 5, the cylinder 3, and the like are located in the high pressure chamber 71.

The invention further provides an air conditioner, which comprises the compressor described in the second embodiment.

The embodiment of the invention has the advantages of reasonable design, simple structure, lubricating effect guarantee, oil injection amount reduction and oil waste avoidance.

The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A compressor, characterized by:

comprises a shell (7) and a pump body component (9);

the pump body subassembly includes: the device comprises a crankshaft (1), an upper flange (2), a cylinder (3), a roller (4) and a lower flange (5);

the upper flange (2) is provided with a first mounting hole (21), the roller (4) is provided with a second mounting hole (41), the lower flange (5) is provided with a third mounting hole (51), two ends of the third mounting hole (51) are respectively an open end (52) and a closed end (53), the roller (4) is arranged in the cylinder (3), and the cylinder (3) is arranged between the upper flange (2) and the lower flange (5);

the crankshaft (1) is vertically arranged, the crankshaft (1) sequentially penetrates through the first mounting hole (21) and the second mounting hole (41) and then extends into the third mounting hole (51) from the open end (52), and an oil return cavity (54) allowing lubricating oil to enter is formed between the crankshaft (1) and the closed end (53) of the third mounting hole (51);

an oil return channel (11) which can be communicated with the oil return cavity (54) and extends along the axial direction of the crankshaft (1) is arranged in the middle of the crankshaft (1), and when the crankshaft (1) rotates, lubricating oil in the oil return cavity (54) can be conveyed to the first mounting hole (21), the second mounting hole (41) and the third mounting hole (51) through the oil return channel (11);

also includes an oil drain pipe (72);

an oil discharge hole is formed in the bottom of the shell (7), and the oil discharge pipe (72) is connected to the oil discharge hole, so that lubricating oil at the bottom of the shell (7) can be discharged through the oil discharge pipe (72);

an oil pool (22) used for storing lubricating oil is arranged on the upper flange (2), the lubricating oil in the oil pool (22) can be conveyed to the first mounting hole (21), the second mounting hole (41) and the third mounting hole (51), and the lubricating oil entering the third mounting hole (51) can flow into the oil return cavity (54);

an oil return hole (12) communicated with the oil return channel (11) is formed in the side wall of the crankshaft (1), and when the crankshaft (1) rotates, lubricating oil in the oil return cavity (54) can flow into the oil pool (22) through the oil return channel (11) and the oil return hole (12) in sequence; the upper flange (2) is provided with a first end face (23) and a second end face (24) which are opposite to each other, the upper flange (2) abuts against the cylinder (3) through the second end face (24), and the oil pool (22) is arranged on the first end face (23).

2. The compressor of claim 1, wherein:

also comprises an exhaust pipe (8);

the pump body assembly (9) is arranged in the shell (7), the exhaust pipe (8) penetrates through the side wall of the shell (7) and can be communicated with the cylinder (3) in the pump body assembly (9), so that the refrigerant compressed in the cylinder (3) can be discharged through the exhaust pipe (8).

3. The compressor of claim 2, wherein:

a first exhaust hole (31) is formed in the side wall of the cylinder (3), and the exhaust pipe (8) is connected to the first exhaust hole (31).

4. The compressor of claim 2, wherein:

when pump body subassembly (9) are including exhaust baffle (6), be provided with on exhaust baffle (6) can with exhaust chamber (63) of cylinder (3) intercommunication be provided with second exhaust hole (64) on the lateral wall of exhaust chamber (63), blast pipe (8) are connected on second exhaust hole (64).

5. The compressor of claim 2, wherein:

the outer peripheral wall of the upper flange (2) is in sealing connection with the inner wall of the shell (7), so that a high-pressure cavity (71) is formed between the upper flange (2) and the bottom wall of the shell (7), the high-pressure cavity (71) can be communicated with the cylinder (3), so that a high-pressure refrigerant compressed in the cylinder (3) can enter the high-pressure cavity (71), and one end of the exhaust pipe (8) extends into the high-pressure cavity (71).

6. The compressor of claim 5, wherein:

the peripheral wall of the upper flange (2) is welded on the inner wall of the shell (7).

7. The compressor of claim 5, wherein:

also includes a sealing member;

the sealing component is arranged between the peripheral wall of the upper flange (2) and the inner wall of the shell (7) and used for sealing a gap between the peripheral wall of the upper flange (2) and the inner wall of the shell (7).

8. The compressor of claim 5, wherein:

the cylinder (3) is provided with a fourth end face (32), the lower flange (5) abuts against the fourth end face (32), a sliding sheet groove (33) is formed in the inner wall of the cylinder (3), a port (34) is formed in the fourth end face (32) through the sliding sheet groove (33), and at least part of the port (34) is located outside the abutting range of the lower flange (5).

9. The compressor of claim 1, wherein:

the number of the oil return holes (12) is at least two, and the oil return holes (12) are sequentially distributed along the circumferential direction of the crankshaft (1).

10. The compressor of claim 1, wherein:

the upper flange (2) is provided with an oil supply channel (25) and an oil storage groove (26) positioned on the second end face (24);

two ends of the oil supply channel (25) are respectively connected with the oil pool (22) and the oil storage groove (26) so that lubricating oil in the oil pool (22) can enter the oil storage groove (26) through the oil supply channel (25);

the oil storage groove (26) can be communicated with the first mounting hole (21) and the second mounting hole (41) so that lubricating oil in the oil storage groove (26) can flow into the first mounting hole (21) and the second mounting hole (41), and the second mounting hole (41) is communicated with the third mounting hole (51) so that the lubricating oil in the oil storage groove (26) can enter the third mounting hole (51) through the second mounting hole (41).

11. The compressor of claim 10, wherein:

the oil storage groove (26) is cylindrical and coaxial with the first mounting hole (21).

12. The compressor of claim 11, wherein:

the number of the oil supply channels (25) is at least two, and the at least two oil supply channels (25) are arranged in a circular array by taking the axis of the first mounting hole (21) as the center.

13. The compressor of claim 10, wherein:

the part of the crankshaft (1) located in the second mounting hole (41) is an eccentric part (13), a first groove (14) extending along the axial direction of the second mounting hole (41) is formed in the surface of the eccentric part (13), and lubricating oil entering the second mounting hole (41) can flow towards the third mounting hole (51) along the first groove (14).

14. The compressor of claim 10, wherein:

the oil storage groove is characterized by further comprising an exhaust partition plate (6) arranged between the upper flange (2) and the cylinder (3), a fourth mounting hole (61) is formed in the exhaust partition plate (6), the crankshaft (1) is sleeved with the fourth mounting hole (61), the oil storage groove (26) can be communicated with the fourth mounting hole (61), the fourth mounting hole (61) is communicated with the second mounting hole (41), and therefore lubricating oil in the oil storage groove (26) can flow into the second mounting hole (41) through the fourth mounting hole (61).

15. The compressor of claim 14, wherein:

and a second groove (62) extending along the axis of the fourth mounting hole (61) is formed in the inner wall of the fourth mounting hole (61), so that lubricating oil entering the fourth mounting hole (61) can flow towards the second mounting hole (41) along the second groove (62).

16. The compressor of any one of claims 10 to 15, wherein:

be provided with first helicla flute (27) on the inner wall of first mounting hole (21), when bent axle (1) is rotatory, can drive and get into lubricating oil in first mounting hole (21) can be followed first helicla flute (27) orientation is kept away from second terminal surface (24) direction motion.

17. The compressor of any one of claims 1 to 15, wherein:

the lower flange (5) is provided with a third end face (55) opposite to the roller (4), a second spiral groove (56) is formed in the inner wall of the third mounting hole (51), and when the crankshaft (1) rotates, lubricating oil entering the third mounting hole (51) can be driven to move towards the direction far away from the third end face (55) along the second spiral groove (56).

18. The compressor of claim 1 or 9, wherein:

be provided with in oil return passage (11) and lead oil sheet (15), when bent axle (1) is rotatory, lead oil sheet (15) and can drive and get into oil return passage (11)'s lubricating oil orientation oil return hole (12) flow.

19. An air conditioner, characterized in that:

comprising a compressor according to any one of claims 1 to 18.