Pump Assemblies and Compressors

Abstract

The present invention provides a pump assembly and a compressor, wherein the pump assembly includes a balancing block, a crankshaft and an oil return pipe, the balancing block has a first channel, the inlet of the first channel is opened on the peripheral side of the balancing block; the balancing block is sleeved on the outer side of the crankshaft, the crankshaft is drivingly connected to the balancing block, the crankshaft has a second channel, the first channel and the second channel are connected; the oil return pipe is connected to the second channel, and the lubricating oil separated from the refrigerant air flow flows to the second channel via the first channel and flows into the oil return pipe from the second channel. The present invention solves the problem of excessively high exhaust oil discharge rate of the compressor in the prior art.

Description

Technical Field

[0001] The present invention relates to the field of compressors, and in particular to a pump body assembly and a compressor. Background Art

[0002] When the high-pressure cavity scroll compressor is running, the low-temperature and low-pressure refrigerant is compressed into a high-temperature and high-pressure gaseous refrigerant, and the high-temperature and high-pressure gaseous refrigerant is mixed with lubricating oil. When the refrigerant flows through the main balance block, the balance block rotates to disturb the refrigerant airflow so that the lubricating oil is separated from the refrigerant. The lubricating oil separated and aggregated from the refrigerant airflow accumulates at the main balance block. The lubricating oil cannot be discharged in time and is carried away again by the refrigerant airflow. The lubricating oil is discharged into the air-conditioning system with the refrigerant airflow. When the lubricating oil content in the gaseous refrigerant is too high, it will affect the heat transfer of the air-conditioning system and reduce the energy consumption of the air-conditioning. Summary of the invention

[0003] The main purpose of the present invention is to provide a pump assembly and a compressor to solve the problem of excessively high exhaust oil discharge rate of the compressor in the prior art.

[0004] In order to achieve the above-mentioned purpose, according to one aspect of the present invention, a pump body assembly is provided, including a balancing block, a crankshaft and an oil return pipe, the balancing block having a first channel, the inlet of which is opened on the peripheral side of the balancing block; the balancing block is sleeved on the outside of the crankshaft, the crankshaft is drivingly connected to the balancing block, the crankshaft has a second channel, the first channel and the second channel are connected; the oil return pipe is connected to the second channel, the lubricating oil separated from the refrigerant airflow flows to the second channel via the first channel and flows into the oil return pipe from the second channel.

[0005] Further, the first channel extends along the circumferential direction of the balancing weight; and / or along the extending direction of the first channel, the cross-section of the first channel gradually decreases.

[0006] Furthermore, the balancing block has a windward surface, the first channel has a first inlet end and a first outlet end, the first inlet end is located at the windward surface, and the first outlet end is connected to the second channel.

[0007] Furthermore, the balancing block has a through hole for avoiding the crankshaft, and the first outlet end is connected to the surface of the through hole.

[0008] Further, the second channel has a second inlet end and a second outlet end, and the second inlet end and the second outlet end are both located on the circumferential side of the crankshaft; and / or the second inlet end and the second outlet end are spaced apart in the axial direction of the crankshaft.

[0009] Furthermore, a groove is provided on the circumferential side of the crankshaft, and the second channel has a second inlet end and a second outlet end, the second inlet end is communicated with the first channel, and the second outlet end is communicated with the interior of the groove.

[0010] Further, the groove extends along the axial direction of the crankshaft, and the second inlet end is located outside the groove.

[0011] Furthermore, the pump body assembly also includes a compression part, the crankshaft is drivingly connected to the compression part, and the second inlet end is arranged away from the compression part relative to the second outlet end.

[0012] Furthermore, the pump body assembly also includes an upper bracket bearing, which is sleeved on the outer side of the crankshaft, and the groove is located in the area covered by the upper bracket bearing, and the lubricating oil in the groove can flow to the upper bracket bearing.

[0013] Furthermore, the pump body assembly also includes an upper bracket bearing and an upper bracket, the upper bracket bearing is sleeved on the outside of the crankshaft; the upper bracket is sleeved on the outside of the upper bracket bearing, and the upper bracket has an oil return chamber connected to both the upper bracket bearing and the oil return pipe, and the second channel is connected to the oil return pipe through the upper bracket bearing and the oil return chamber.

[0014] Further, an oil return chamber is formed between the upper bracket and the crankshaft.

[0015] According to another aspect of the present invention, a compressor is provided, comprising the above-mentioned pump body assembly.

[0016] Furthermore, the compressor also includes a shell, and the balance block of the pump body assembly, the crankshaft of the pump body assembly, the upper bracket bearing of the pump body assembly, and the upper bracket of the pump body assembly are all arranged inside the shell, and the upper bracket is connected to the shell. The bottom of the shell has an oil pool, and the end of the return oil pipe of the pump body assembly is connected to the oil pool.

[0017] By applying the technical solution of the present invention, a first channel, a second channel and an oil return pipe are set up to provide a reflux channel for the lubricating oil separated from the refrigerant airflow, so that the lubricating oil can be discharged from the balancing block in time, and the balancing block is prevented from continuously rotating to carry away the separated lubricating oil and mix it with the refrigerant airflow again. Specifically, the balancing block rotates to separate the lubricating oil in the refrigerant airflow and gathers it near the balancing block. The lubricating oil passes through the first channel and flows into the oil return pipe via the second channel, thereby realizing the timely reflux of the lubricating oil and preventing the lubricating oil from being discharged with the refrigerant airflow, thereby improving the oil-gas separation ability of the compressor, reducing the lubricating oil content in the discharged refrigerant airflow, and thus reducing the oil discharge rate of the compressor exhaust. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0019] Figure 1 A schematic structural diagram of a compressor according to an embodiment of the present invention is shown;

[0020] Figure 2 A schematic diagram of the structure of the balancing block is shown;

[0021] Figure 3 A schematic diagram of the structure of a crankshaft is shown;

[0022] Figure 4 A schematic diagram of the structure of the pump body assembly excluding the compression part is shown.

[0023] The above drawings include the following reference numerals:

[0024] 10. Balance block; 11. First channel; 111. First inlet end; 112. First outlet end; 12. Windward surface; 13. Through hole; 20. Crankshaft; 21. Second channel; 211. Second inlet end; 212. Second outlet end; 22. Groove; 30. Oil return pipe; 40. Compression part; 50. Upper bracket bearing; 60. Upper bracket; 61. Oil return chamber; 70. Housing; 71. Oil pool. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meanings as commonly understood by ordinary technicians in the technical field to which this application belongs.

[0027] In the present invention, unless otherwise specified, the directional words used, such as "up, down, top, bottom", usually refer to the directions shown in the drawings, or to the components themselves in the vertical, perpendicular or gravity directions; similarly, for ease of understanding and description, "inside and outside" refer to the inside and outside relative to the outline of each component itself, but the above-mentioned directional words are not used to limit the present invention.

[0028] In order to solve the problem of excessively high exhaust oil discharge rate of compressors in the prior art, the present invention provides a pump body assembly and a compressor.

[0029] like Figures 1 to 4 As shown, a pump body assembly includes a balancing block 10, a crankshaft 20 and an oil return pipe 30, the balancing block 10 has a first channel 11, the entrance of the first channel 11 is opened on the peripheral side of the balancing block 10; the balancing block 10 is sleeved on the outer side of the crankshaft 20, the crankshaft 20 is drivingly connected to the balancing block 10, the crankshaft 20 has a second channel 21, the first channel 11 and the second channel 21 are connected; the oil return pipe 30 is connected to the second channel 21, the lubricating oil separated from the refrigerant airflow flows to the second channel 21 via the first channel 11 and flows into the oil return pipe 30 from the second channel 21.

[0030] This embodiment provides a reflux channel for the lubricating oil separated from the refrigerant airflow by setting a first channel 11, a second channel 21 and an oil return pipe 30, so that the lubricating oil can be discharged from the balance block 10 in time, and it is prevented that the balance block 10 continues to rotate and carries away the separated lubricating oil and mixes it with the refrigerant airflow again. Specifically, the balance block 10 rotates to separate the lubricating oil in the refrigerant airflow and gathers it near the balance block 10. The lubricating oil passes through the first channel 11 and flows into the oil return pipe 30 via the second channel 21, so as to realize the timely reflux of the lubricating oil and prevent the lubricating oil from being discharged with the refrigerant airflow, thereby improving the oil-gas separation ability of the compressor, reducing the lubricating oil content in the discharged refrigerant airflow, and thus reducing the oil discharge rate of the compressor exhaust.

[0031] like Figure 2 As shown, in this embodiment, the first channel 11 extends along the circumference of the balancing block 10; and / or along the extension direction of the first channel 11, the cross section of the first channel 11 gradually decreases. Specifically, the balancing block 10 of this embodiment is a circular ring structure with an irregular outer circumference, and the first channel 11 extends from the outer circumference of the balancing block 10 to the center of the balancing block 10 in an arc, and the opening at the entrance of the first channel 11 is the largest. The first channel 11 is designed to be a structure that gradually decreases from the entrance to the exit, so as to generate a sufficient pressure difference so that the refrigerant airflow brings the lubricating oil into the second channel 21.

[0032] like Figure 2 As shown, in this embodiment, the balancing block 10 has a windward surface 12, and the first channel 11 has a first inlet end 111 and a first outlet end 112. The first inlet end 111 is located at the windward surface 12, and the first outlet end 112 is connected to the second channel 21, so that the lubricating oil gathered at the balancing block 10 is discharged to the first channel 11 and then into the second channel 21. Specifically, the outer peripheral surface of the balance block 10 is formed by splicing two semi-cylindrical surfaces of different diameters. The two joints of the two semi-cylindrical surfaces form two planes. As the balance block 10 rotates, the two joints form a windward surface 12 and a leeward surface, respectively. The balance block 10 squeezes the refrigerant airflow at high speed on the windward surface 12 to form a high-pressure area and gathers a large amount of lubricating oil separated from the refrigerant airflow. The first inlet end 111 is set on the windward surface 12. In this way, on the one hand, the high pressure on the windward surface 12 makes the lubricating oil here flow from the first inlet end 111 into the first channel 11 and flow to the first outlet end 112, and then flow into the second channel 21, so that the lubricating oil on the windward surface 12 is discharged in time. On the other hand, the pressure on the windward surface 12 of the balance block 10 is reduced, thereby reducing the turbulence loss of the balance block 10.

[0033] In this embodiment, the balancing block 10 has a through hole 13 for avoiding the crankshaft 20, and the first outlet end 112 is connected to the surface of the through hole 13, so as to be connected with the second channel 21 of the crankshaft 20. Specifically, the through hole 13 is arranged at the center of the balancing block 10, and the crankshaft 20 is passed through the balancing block 10 through the through hole 13, so that the side wall of the through hole 13 is in contact with the outer peripheral surface of the crankshaft 20, so that the first outlet end 112 can be in contact with the outer peripheral surface of the crankshaft 20, thereby connecting the first channel 11 and the second channel 21.

[0034] like Figure 3 As shown, in this embodiment, the second channel 21 has a second inlet end 211 and a second outlet end 212, and the second inlet end 211 and the second outlet end 212 are both located on the circumferential side of the crankshaft 20; and / or the second inlet end 211 and the second outlet end 212 are spaced apart in the axial direction of the crankshaft 20, so that the lubricating oil changes its axial position by flowing in the second channel 21, so that the lubricating oil flows out from the axial position of the crankshaft 20 away from the balancing block 10, avoiding being mixed with the refrigerant gas flow and being discharged. The crankshaft 20 of this embodiment is in the shape of an elongated cylinder, and the main body of the second channel 21 extends along the length direction of the crankshaft 20, and the two ends of the main body are bent toward the outer peripheral surface of the crankshaft 20, forming the second inlet end 211 and the second outlet end 212 spaced apart in the axial direction, so that the lubricating oil in the second channel 21 can change its axial position along the second channel 21, so as to be away from the balancing block 10.

[0035] like Figure 3 As shown, in this embodiment, the circumferential side of the crankshaft 20 has a groove 22, which extends along the axial direction of the crankshaft 20 and in its length direction. The width of the groove 22 covers the size of the second outlet end 212, but does not cover the entire circumferential side of the crankshaft 20. The second inlet end 211 is connected to the first channel 11, and the second outlet end 212 is connected to the interior of the groove 22, so that the lubricating oil flows from the first channel 11 to the second inlet end 211 and to the second outlet end 212, and can enter the groove 22 when flowing out from the second outlet end 212.

[0036] In this embodiment, the second inlet end 211 is located outside the groove 22, so that the second inlet end 211 and the second outlet end 212 are isolated from each other and not connected to each other, so as to avoid affecting the discharge of the lubricating oil. Specifically, the crankshaft 20 of this embodiment is placed vertically, and the connection between the balancing block 10 and the crankshaft 20 is located below the groove 22, so the second inlet end 211 is located vertically below the second outlet end 212. The connection between the balancing block 10 and the crankshaft 20 of this embodiment is also provided with a recess, so that it is equivalent to a protrusion between the second inlet end 211 and the second outlet end 212, so that when the lubricating oil flows from the first outlet end 112 to the second inlet end 211, the lubricating oil will not flow upward along the axial direction of the balancing block 10 and the crankshaft 20 to the second outlet end 212 to cause pressure loss, but the lubricating oil flows out from the first outlet end 112 and flows into the second channel 21, and flows out from the second outlet end 212 to the groove 22 of the crankshaft 20.

[0037] In this embodiment, the pump body assembly further includes a compression part 40, the crankshaft 20 is drivingly connected to the compression part 40, and the second inlet end 211 is arranged away from the compression part 40 relative to the second outlet end 212, so that the lubricating oil can flow to the upper end of the compressor as it flows in the second channel 21. Specifically, the compression part 40 includes a fixed scroll and a movable scroll of the compressor, the compression part 40 is arranged at the upper end of the compressor, and the second outlet end 212 is close to the compression part 40, so that the lubricating oil is led to the upper end of the compressor, so as to facilitate the lubricating oil to be led to a suitable chamber for reflux.

[0038] like Figure 4 As shown, in this embodiment, the pump body assembly also includes an upper bracket bearing 50, which is sleeved on the outer side of the crankshaft 20, and the groove 22 is located in the area covered by the upper bracket bearing 50. The lubricating oil in the groove 22 can flow to the upper bracket bearing 50, thereby channeling the lubrication of the upper bracket bearing 50, thereby avoiding the upper bracket bearing 50 from lack of oil and wear, thereby extending its service life. Specifically, the length of the upper bracket bearing 50 is greater than the length of the groove 22, and the groove 22 is located inside the matching section of the upper bracket bearing 50 and the crankshaft 20, so that a small chamber extending along the axial direction of the crankshaft 20 is formed at the groove 22. The oil-gas mixture entering the groove 22 passes through the matching clearance between the upper bracket bearing 50 and the crankshaft 20. Under the high-speed rotation of the crankshaft 20, the oil and gas are separated to a certain extent due to different densities, and part of the lubricating oil adheres to the surface of the upper bracket bearing 50 or the crankshaft 20, thereby improving the lubrication of the upper bracket bearing 50.

[0039] In this embodiment, the pump body assembly further includes an upper bracket 60, which is sleeved on the outer side of the upper bracket bearing 50, and has an oil return chamber 61 connected to both the upper bracket bearing 50 and the oil return pipe 30. The second channel 21 is connected to the oil return pipe 30 through the upper bracket bearing 50 and the oil return chamber 61, so that the lubricating oil flows out of the second channel 21, flows into the oil return chamber 61, and finally flows out from the oil return pipe 30. Specifically, the upper bracket 60 is a stationary part, and the end of the upper bracket 60 away from the upper bracket bearing 50, that is, the upper end of the upper bracket 60 in this embodiment, has a stationary oil return chamber 61, and part of the oil-gas mixture flows into the groove 22 of the crankshaft 20 and then enters the oil return chamber 61 through the original cut edge of the crankshaft 20, and finally flows out through the oil return pipe 30, thereby indicating that the lubricating oil is discharged from the compressor through the exhaust port along with the refrigerant gas flow, thereby reducing the exhaust oil discharge rate of the compressor.

[0040] In this embodiment, the oil return chamber 61 is formed between the upper bracket 60 and the crankshaft 20. The lower end of the upper bracket 60 of this embodiment is connected to the crankshaft 20 through the lower bracket bearing, and the upper end center of the upper bracket 60 has a circular chamber, and the crankshaft 20 passes through the center of the chamber, so that there is a large gap between the upper bracket 60 and the crankshaft 20, thereby forming the oil return chamber 61, so that the lubricating oil gathers in the oil return chamber 61 and flows out from the oil return pipe 30.

[0041] This embodiment also provides a compressor, including the above-mentioned pump body assembly. This embodiment opens a first channel 11 inside the balance block 10 to connect the windward surface 12 of the balance block 10 and the inner peripheral side of the balance block 10, and cooperates with the second channel 21 in the crankshaft 20 to guide the lubricating oil accumulated on the windward surface 12 of the balance block 10 to the upper bracket bearing 50, and then enters the return oil chamber 61 of the upper bracket 60 through the matching clearance between the upper bracket bearing 50 and the crankshaft 20 and the lubricating cutting edge of the upper bracket bearing 50, and finally discharged through the return oil pipe 30. It not only avoids the lubricating oil from being carried away by the refrigerant airflow again due to failure to be discharged in time, but also enhances the lubrication of the upper bracket bearing 50, and at the same time reduces the pressure in the high-pressure area on the windward surface 12 of the balance block 10 to reduce the additional power consumption of the turbulence of the balance block 10.

[0042] In this embodiment, the compressor also includes a shell 70, and the balance block 10 of the pump body assembly, the crankshaft 20 of the pump body assembly, the upper bracket bearing 50 of the pump body assembly, and the upper bracket 60 of the pump body assembly are all arranged inside the shell 70, and the upper bracket 60 is connected to the shell 70 by spot welding. The bottom of the shell 70 has an oil pool 71, and the end of the return oil pipe 30 of the pump body assembly is connected to the oil pool 71, so that the lubricating oil flows back to the oil pool 71 through the return oil pipe 30, realizing recycling and reducing the energy consumption of refrigeration devices such as air conditioners.

[0043] The compressor of this embodiment also includes a motor, a lower bracket, a lower support ring, a cross slip ring and other structures. The stator of the motor is fixed to the housing 70 by a shrink sleeve. The movable scroll and the fixed scroll are installed on the upper bracket 60 with a phase angle difference of 180 degrees. The movable scroll moves under the drive of the crankshaft 20 and meshes with the fixed scroll to form a series of crescent-shaped closed cavities that are isolated from each other and have continuously changing volumes. The fixed scroll is fixed to the upper bracket 60 by screw fasteners. The lower bracket is fixed to the lower support ring by screws, and the lower support ring is fixed to the housing 70 by spot welding. When the compressor is running, the motor drives the crankshaft 20 to rotate, and the crank of the crankshaft 20 drives the movable scroll to move. Under the anti-rotation restriction of the cross slip ring, the movable scroll moves in a translational motion around the center of the crankshaft 20 with a fixed radius. The refrigerant entering from the suction pipe is sucked into the crescent-shaped suction chamber formed by the movable scroll and the stationary scroll, and is discharged from the exhaust port of the stationary scroll after compression, entering the cavity between the upper cover and the stationary scroll, and then enters the upper chamber area of ​​the compressor between the upper bracket 60 and the motor through the exhaust groove of the stationary scroll and the upper bracket 60. Part of it enters the lower chamber of the compressor at the lower end of the motor through the flow groove between the motor and the housing 70, and finally the high-pressure exhaust refrigerant is discharged through the exhaust pipe.

[0044] The principle of separating lubricating oil in this embodiment is as follows: when the crankshaft 20 drives the balancing block 10 to rotate at high speed, the refrigerant airflow is strongly disturbed, and the semi-annular structure of the balancing block 10 will produce a windward surface 12. The windward surface 12 squeezes the refrigerant airflow at high speed, so that a high-pressure area is formed in the front area of ​​the windward surface 12. A large amount of lubricating oil accumulates here. If there is no path to guide the lubricating oil to the lower chamber of the compressor, the lubricating oil will be discharged from the compressor driven by the refrigerant airflow. In this embodiment, a first channel 11 and a second channel 21 are opened inside the balancing block 10 and the crankshaft 20, and a groove 22 is opened on the surface of the matching section of the crankshaft 20 and the upper bracket bearing 50. The lubricating oil accumulated on the windward surface 12 of the balancing block 10 is guided to the groove 22 by the pressure difference. It can not only prevent the lubricating oil from being carried away by the refrigerant airflow and discharged out of the compressor again, but also reduce the additional turbulence loss of the balancing block 10. The oil-gas mixture entering the groove 22 passes through the matching clearance between the upper bracket bearing 50 and the crankshaft 20. Under the high-speed rotation of the crankshaft 20, the oil and gas are separated to a certain extent due to different densities. Part of the lubricating oil adheres to the surface of the bearing or the crankshaft 20, thereby improving the lubrication of the upper bracket bearing 50. The remaining oil-gas mixture passes through the original cut edge of this section of the crankshaft 20 and enters the oil return chamber 61 of the upper bracket 60, and finally enters the oil pool 71 at the bottom of the shell 70 through the oil return pipe 30, thereby guiding the high-pressure refrigerant airflow rich in lubricating oil to the lower chamber of the compressor, avoiding its movement in the upper chamber of the compressor and being discharged from the compressor through the exhaust port, thereby reducing the exhaust oil discharge rate of the compressor and the turbulence loss of the balance block 10.

[0045] It should be noted that, the multiple in the above embodiments refers to at least two.

[0046] From the above description, it can be seen that the above embodiments of the present invention achieve the following technical effects:

[0047] 1. Solve the problem of excessively high exhaust oil discharge rate of compressors in the prior art;

[0048] 2. By setting the first channel, the second channel and the oil return pipe, a reflux channel is provided for the lubricating oil separated from the refrigerant airflow, so that the lubricating oil can be discharged from the balancing block in time, and the balancing block is prevented from continuously rotating and carrying away the separated lubricating oil and mixing it with the refrigerant airflow again;

[0049] 3. The pressure on the windward side of the balance block is reduced, thereby reducing the turbulence loss of the balance block.

[0050] Obviously, the above-described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0051] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0052] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein.

[0053] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A pump assembly, characterized in that: include: A balancing block (10), the balancing block (10) having a first channel (11), an inlet of the first channel (11) being opened on a peripheral side surface of the balancing block (10), and the first channel (11) extending along the circumference of the balancing block (10); A crankshaft (20), wherein the balancing block (10) is sleeved on an outer side of the crankshaft (20), the crankshaft (20) is drivingly connected to the balancing block (10), the crankshaft (20) has a second channel (21), and the first channel (11) and the second channel (21) are in communication; An oil return pipe (30), the oil return pipe (30) being in communication with the second channel (21), and the lubricating oil separated from the refrigerant airflow flows through the first channel (11) to the second channel (21) and flows from the second channel (21) into the oil return pipe (30).

2. The pump assembly according to claim 1, characterized in that: Along the extension direction of the first channel (11), the cross section of the first channel (11) gradually decreases.

3. The pump assembly according to claim 1, characterized in that: The balancing block (10) has a windward surface (12), and the first channel (11) has a first inlet end (111) and a first outlet end (112), the first inlet end (111) being located at the windward surface (12), and the first outlet end (112) being connected to the second channel (21).

4. The pump assembly according to claim 3, characterized in that: The balancing block (10) has a through hole (13) for avoiding the crankshaft (20), and the first outlet end (112) is connected to the surface of the through hole (13).

5. The pump assembly according to claim 1, characterized in that: The second channel (21) has a second inlet end (211) and a second outlet end (212), and the second inlet end (211) and the second outlet end (212) are both located on the circumferential side of the crankshaft (20); and / or The second inlet end (211) and the second outlet end (212) are arranged at intervals in the axial direction of the crankshaft (20).

6. The pump assembly according to claim 1, characterized in that: The crankshaft (20) has a groove (22) on its circumferential side, and the second channel (21) has a second inlet end (211) and a second outlet end (212), the second inlet end (211) being in communication with the first channel (11), and the second outlet end (212) being in communication with the interior of the groove (22).

7. The pump assembly according to claim 6, characterized in that: The pump body assembly further comprises an upper bracket bearing (50), wherein the upper bracket bearing (50) is sleeved on the outside of the crankshaft (20), the groove (22) is located in an area covered by the upper bracket bearing (50), and the lubricating oil in the groove (22) can flow toward the upper bracket bearing (50).

8. The pump assembly according to claim 6, characterized in that: The groove (22) extends along the axial direction of the crankshaft (20), and the second inlet end (211) is located outside the groove (22).

9. The pump assembly according to claim 8, characterized in that: The pump body assembly further comprises a compression part (40), the crankshaft (20) being drivingly connected to the compression part (40), and the second inlet end (211) being arranged away from the compression part (40) relative to the second outlet end (212).

10. The pump assembly according to any one of claims 1 to 9, characterized in that: The pump assembly also includes: An upper bracket bearing (50), the upper bracket bearing (50) being sleeved on the outside of the crankshaft (20); An upper bracket (60), the upper bracket (60) being sleeved on the outer side of the upper bracket bearing (50), the upper bracket (60) having an oil return chamber (61) which is in communication with both the upper bracket bearing (50) and the oil return pipe (30), and the second channel (21) being in communication with the oil return pipe (30) via the upper bracket bearing (50) and the oil return chamber (61).

11. The pump assembly according to claim 10, characterized in that: The oil return chamber (61) is formed between the upper bracket (60) and the crankshaft (20).

12. A compressor, characterized in that: A pump body assembly comprising any one of claims 1 to 11.

13. The compressor according to claim 12, characterized in that The compressor also includes: A housing (70), a balancing block (10) of the pump assembly, a crankshaft (20) of the pump assembly, an upper bracket bearing (50) of the pump assembly, and an upper bracket (60) of the pump assembly are all arranged inside the housing (70), and the upper bracket (60) is connected to the housing (70). The bottom of the housing (70) has an oil pool (71), and the end of the oil return pipe (30) of the pump assembly is connected to the oil pool (71).

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