Flow control valve, oil pump assembly having the flow control valve, and scroll compressor

Abstract

Embodiments of the present invention disclose a flow control valve, an oil pump assembly having the flow control valve, and a scroll compressor. The flow control valve includes: a valve body having an inlet for fluid to flow into the valve body and an outlet for fluid to flow out of the valve body; a channel extending between the inlet and the outlet and along a predetermined direction, the area of a cross-section of the channel perpendicular to the predetermined direction being negatively correlated with the distance of the cross-section from the inlet; a valve element slidably disposed in the channel, the flow area between the valve element and the inner wall of the channel being negatively correlated with the distance of the valve element from the inlet; and an elastic member disposed in the valve body to apply an elastic force to the valve element to move the valve element in a direction approaching the inlet. Thereby, for example, the lubrication of the scroll compressor is improved.

Description

Technical Field

[0001] Embodiments of the present invention relate to a flow control valve, an oil pump assembly having the flow control valve, and a scroll compressor. Background Art

[0002] A scroll compressor includes a stationary scroll, an orbiting scroll, and an oil pump for supplying lubricating oil. Summary of the Invention

[0003] The object of embodiments of the present invention is to provide a flow control valve, an oil pump assembly having the flow control valve, and a scroll compressor having the flow control valve or the oil pump assembly, thereby improving the lubrication of the scroll compressor, for example.

[0004] According to an embodiment of the present invention, there is provided a flow control valve, including: a valve body having an inlet for fluid to flow into the valve body and an outlet for fluid to flow out of the valve body; a channel extending between the inlet and the outlet and in a predetermined direction, the area of a cross-section of the channel perpendicular to the predetermined direction being negatively correlated with the distance of the cross-section from the inlet; a valve element slidably disposed in the channel, the flow area between the valve element and the inner wall of the channel being negatively correlated with the distance of the valve element from the inlet; and an elastic member disposed in the valve body to apply an elastic force to the valve element to move the valve element in a direction approaching the inlet.

[0005] According to an embodiment of the present invention, the flow control valve further includes: an internal channel member disposed in the valve body, wherein the channel is formed between a first part of the inner wall of the valve body and a second part of the outer wall of the internal channel member, and a cross-section of the channel perpendicular to the predetermined direction is annular, a top view of the valve element in the predetermined direction is annular, and the first part and the second part gradually approach in a direction away from the inlet.

[0006] According to an embodiment of the present invention, both the annular shape of the channel and the annular shape of the valve element are circular, and the first part and the second part have a circular shape.

[0007] According to an embodiment of the present invention, one of the first part of the inner wall of the valve body and the second part of the outer wall of the internal channel member has a cylindrical surface, and the other of the first part of the inner wall of the valve body and the second part of the outer wall of the internal channel member has a frustum of a cone surface.

[0008] According to an embodiment of the present invention, the first part of the inner wall of the valve body has a cylindrical surface, and the second part of the outer wall of the internal channel member has a frustum of a cone surface, and the first part of the inner wall of the valve body serves as a guide for the valve element.

[0009] According to an embodiment of the present invention, the valve element includes: a plate-like third portion extending in a plane perpendicular to a predetermined direction, and having an annular shape when viewed in the predetermined direction.

[0010] According to an embodiment of the present invention, the valve element further includes: an annular fourth portion extending from the outer periphery of the third portion in the predetermined direction, and the fourth portion slides along the first portion of the inner wall of the valve body.

[0011] According to an embodiment of the present invention, the fourth portion of the valve element extends from the outer periphery of the third portion in a direction away from the inlet.

[0012] According to an embodiment of the present invention, the flow control valve further includes: a guide member disposed in the valve body to guide the valve element to slide along the guide member in a predetermined direction.

[0013] According to an embodiment of the present invention, the passage is formed in the first portion of the inner wall of the valve body, and the first portion of the inner wall of the valve body gradually approaches the center line of the first portion of the inner wall of the valve body in a direction away from the inlet.

[0014] According to an embodiment of the present invention, in a cross-section perpendicular to the predetermined direction, the first portion of the inner wall of the valve body has a circular shape, and the outer periphery of the valve element has a circular shape when viewed in the predetermined direction.

[0015] According to an embodiment of the present invention, the first portion of the inner wall of the valve body has a frustum of a cone surface.

[0016] According to an embodiment of the present invention, the valve element includes: a plate-like third portion extending in a plane perpendicular to a predetermined direction, and having a circular shape when viewed in the predetermined direction.

[0017] According to an embodiment of the present invention, the valve element has a central hole, the guide member has a rod-like shape, and passes through the central hole of the valve element to guide the valve element to slide along the guide member in a predetermined direction.

[0018] According to an embodiment of the present invention, the elastic member is disposed on a side of the valve element away from the inlet, and is a helical spring.

[0019] According to an embodiment of the present invention, there is also provided an oil pump assembly for a scroll compressor, including: an oil pump; the oil pump having an inlet and an outlet; and the above-mentioned flow control valve, the inlet of the flow control valve being in communication with the outlet of the oil pump.

[0020] According to an embodiment of the present invention, the oil pump has a drive shaft; and a driving member, the driving member being coupled to the drive shaft to drive oil to flow into the oil pump from an inlet and flow out from an outlet of the oil pump.

[0021] According to an embodiment of the present invention, the drive shaft of the oil pump extends in the predetermined direction and passes through the flow control valve, the driving member of the oil pump is disposed on the lower side of the passage of the flow control valve, and the valve element is disposed on the upper side of the driving member of the oil pump.

[0022] According to an embodiment of the present invention, the flow control valve further includes an internal passage member disposed in the valve body, the passage being formed between a first portion of the inner wall of the valve body and a second portion of the outer wall of the internal passage member, the first portion of the inner wall of the valve body having a cylindrical surface, and the second portion of the outer wall of the internal passage member having a frustoconical surface, the internal passage member being fixed to the drive shaft of the oil pump and disposed on the upper side of the driving member of the oil pump; and the valve element includes a plate-like third portion extending in a plane perpendicular to the predetermined direction, and when viewed in the predetermined direction, the third portion has an annular shape.

[0023] According to an embodiment of the present invention, the oil pump is a centrifugal pump, and the driving member of the oil pump is an impeller.

[0024] According to an embodiment of the present invention, there is also provided a scroll compressor, including: the above-mentioned flow control valve, or the above-mentioned oil pump assembly for a scroll compressor and a motor, the motor including: a stator; a rotor disposed in the stator; and a drive shaft, the rotor being connected to the drive shaft, wherein the drive shaft includes: a first end; a second end; an oil supply passage extending from the first end of the drive shaft to the second end within the drive shaft; and a discharge passage extending in a direction intersecting the axial direction of the drive shaft and communicating with the oil supply passage, and wherein the oil supply passage of the drive shaft is in fluid communication with the outlet of the valve body of the flow control valve at the first end of the drive shaft.

[0025] According to an embodiment of the present invention, the scroll compressor further includes: a first bearing disposed at the first end of the drive shaft, the motor being disposed above the first bearing; a bracket disposed above the motor, the bracket including: a cup-shaped main body portion and a hub portion disposed at the lower part of the main body portion, the hub portion of the bracket having a through hole; a second bearing disposed in the through hole of the hub portion of the bracket, the drive shaft being rotatably connected to the bracket through the second bearing; a balance weight connected to the drive shaft and disposed in the main body portion of the bracket; and a moving scroll plate, the moving scroll plate including: an end plate; and a hub portion extending from one side of the end plate, the hub portion and the end plate defining a blind hole, the second end of the drive shaft being inserted into the blind hole and connected to the hub portion of the moving scroll plate, and the lower end surface of the end plate of the moving scroll plate being in contact with the upper end surface of the main body portion of the bracket, wherein the discharge passage of the drive shaft includes: a first discharge passage leading to the first bearing; and a second discharge passage leading to the second bearing.

[0026] According to an embodiment of the present invention, the discharge passage of the drive shaft further includes a third discharge passage leading to the space between the bracket and the motor.

[0027] According to an embodiment of the present invention, there is a gap between the second end of the drive shaft and the inner wall of the blind hole, and there is a gap between the drive shaft and the second bearing, such that the oil flowing out from the oil supply passage of the drive shaft at the second end of the drive shaft enters the main body portion, and a part of the oil flowing out from the second discharge passage enters the main body portion, and a part of the oil in the main body portion enters between the lower end surface of the end plate of the moving scroll plate and the upper end surface of the main body portion of the bracket by the centrifugal force applied by the balance weight.

[0028] According to an embodiment of the present invention, the main body portion of the bracket has a through hole at a predetermined height to limit the oil level in the main body portion of the bracket.

[0029] By adopting the flow control valve according to the embodiment of the present invention, the oil pump assembly having the flow control valve, and the scroll compressor having the flow control valve or the oil pump assembly, the lubrication of the scroll compressor is improved, for example. Description of the Drawings

[0030] Figure 1 Schematic diagram of an oil pump assembly for a scroll compressor according to an embodiment of the present invention;

[0031] Figure 2 Schematic diagram of an oil pump assembly for a scroll compressor according to another embodiment of the present invention;

[0032] Figure 3 Schematic diagram of a scroll compressor according to an embodiment of the present invention; and

[0033] Figure 4 Another schematic diagram of a scroll compressor according to an embodiment of the present invention. Detailed implementation manners

[0034] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation manners.

[0035] Figure 1 A schematic diagram of an oil pump assembly 100 for a scroll compressor according to an embodiment of the present invention, in which the illustration of the elastic member is omitted for clarity. Figure 2 A schematic diagram of an oil pump assembly 100 for a scroll compressor according to another embodiment of the present invention, in which the elastic member 15 is shown.

[0036] See Figures 1 to 2 , the flow control valve 10 according to an embodiment of the present invention includes: a valve body 11, the valve body 11 having an inlet 111 for fluid to flow into the valve body 11 and an outlet 112 for fluid to flow out of the valve body 11; a channel 115 extending between the inlet 111 and the outlet 112 and along a predetermined direction D, the area of the cross-section of the channel perpendicular to the predetermined direction being negatively correlated with the distance of the cross-section from the inlet, specifically, the area of the cross-section of the channel 115 perpendicular to the predetermined direction D gradually decreases in the direction away from the inlet 111, and vice versa; a valve element 12 slidably disposed in the channel 115, the flow area between the valve element 12 and the inner wall of the channel 115 being negatively correlated with the distance of the valve element 12 from the inlet 111, specifically, the farther the valve element 12 is from the inlet 111, the smaller the flow area between the valve element 12 and the inner wall of the channel 115, and vice versa; and an elastic member 15 disposed in the valve body 11 to apply an elastic force to the valve element 12 to move the valve element 12 in the direction toward the inlet 111.

[0037] In some embodiments of the present invention, see Figure 1 and Figure 2 , the flow control valve 10 further includes: an internal channel member 16 disposed in the valve body 11, the channel 115 being formed between a first part 11C of the inner wall of the valve body 11 and a second part 16C of the outer wall of the internal channel member 16, the cross-section of the channel 15 perpendicular to the predetermined direction D being annular, the top view of the valve element 12 in the predetermined direction D being annular, and the first part 11C and the second part 16C gradually approaching in the direction away from the inlet 111.

[0038] In some embodiments of the present invention, see Figure 1 and Figure 2, both the annulus of the channel 115 and the annulus of the valve element 12 are circular rings, and the first part 11C and the second part 16C have circular shapes. In a cross-section perpendicular to the predetermined direction D, the channel 115 has a circular-ring shape, and the first part 11C of the inner wall of the valve body 11 and the second part 16C of the outer wall of the internal channel member 16 have circular shapes, and when viewed in the predetermined direction D, the valve element 12 has a circular-ring shape. For example, one of the first part 11C of the inner wall of the valve body 11 and the second part 16C of the outer wall of the internal channel member 16 has a cylindrical surface, and the other of the first part 11C of the inner wall of the valve body 11 and the second part 16C of the outer wall of the internal channel member 16 has a frustum of a cone surface. In Figure 1 and Figure 2 In the example shown, the first part 11C of the inner wall of the valve body 11 has a cylindrical surface, and the second part 16C of the outer wall of the internal channel member 16 has a frustum of a cone surface, and the first part 11C of the inner wall of the valve body 11 can serve as a guide for the valve element 12.

[0039] In some embodiments of the present invention, referring to Figure 1 and Figure 2 , the valve element 12 includes: a plate-like third part 121 extending in a plane perpendicular to the predetermined direction D, and when viewed in the predetermined direction D, the third part 121 has an annular shape. According to an example of the present invention, as Figure 2 shown, the valve element 12 further includes: an annular fourth part 122 extending from the outer periphery of the third part 121 along the predetermined direction D, and the fourth part 122 slides along the first part 11C of the inner wall of the valve body 11. In Figure 2 In the embodiment shown, the fourth part 122 of the valve element 12 extends from the outer periphery of the third part 121 in a direction away from the inlet 111. In this case, the fourth part 122 can serve as the guided part of the valve element 12 and is guided by the first part 11C of the inner wall of the valve body 11. In addition, the valve element 12 can serve as a positioning seat for the elastic member 15. For example, when the elastic member 15 is a helical spring, the valve element 12 can serve as a spring seat.

[0040] In some embodiments of the present invention, referring to Figure 1 and Figure 2 , the flow control valve 10 further includes: a guide member disposed in the valve body 11 to guide the valve element 12 to slide along the guide member in the predetermined direction D. In this case, the first part 11C of the inner wall of the valve body 11 may not serve as a guide for the valve element 12.

[0041] In some embodiments of the present invention, referring to Figure 1 and Figure 2 , the channel 115 is formed in the first portion 11C of the inner wall of the valve body 11, and the first portion 11C of the inner wall of the valve body 11 gradually approaches the center line of the first portion 11C of the inner wall of the valve body 11 in a direction away from the inlet 111. In this case, the internal channel member 16 may not be provided or an internal channel member 16 having a frustoconical surface may not be provided. For example, the internal channel member 16 may have a cylindrical surface. According to an example of the present invention, in a cross-section perpendicular to the predetermined direction D, the first portion 11C of the inner wall of the valve body 11 has a circular shape, and when viewed in the predetermined direction D, the outer periphery of the valve element 12 has a circular shape. For example, the first portion 11C of the inner wall of the valve body 11 has a frustoconical surface. According to an example of the present invention, the valve element 12 includes: a plate-like third portion 121 extending in a plane perpendicular to the predetermined direction D, and when viewed in the predetermined direction D, the third portion 121 has a circular shape. For example, the valve element 12 has a central hole, the guide member has a rod-like shape, and passes through the central hole of the valve element 12 to guide the valve element 12 to slide along the guide member in the predetermined direction D. The guide member may be fixed to the valve body. For example, the guide member is a sleeve, and the transmission shaft 22 of the oil pump 20 described later passes through the sleeve. Alternatively, the transmission shaft 22 of the oil pump 20 may serve as the guide member.

[0042] In some embodiments of the present invention, referring to Figure 2 , the elastic member 15 is disposed on a side of the valve element 12 away from the inlet 111 and is a helical spring.

[0043] Referring to Figures 1 to 2 , an oil pump assembly 100 for a scroll compressor according to an embodiment of the present invention includes: an oil pump 20; the oil pump 20 has an inlet 211 and an outlet 212; and the above-mentioned flow control valve 10, and the inlet 111 of the flow control valve 10 communicates with the outlet 212 of the oil pump 20. For example, the oil pump 20 is disposed in the valve body 11 and below the channel 115.

[0044] In some embodiments of the present invention, referring to Figure 1 and Figure 2, the oil pump 20 has a drive shaft 22; and a driving member 23, the driving member 23 being coupled to the drive shaft 22 to drive oil to flow into the oil pump 20 from an inlet 211 and flow out from an outlet 212 of the oil pump 20. The drive shaft 22 is coupled to the drive shaft of the motor. In the illustrated example, the drive shaft 22 of the oil pump 20 extends in the predetermined direction D and passes through the flow control valve 10, the driving member 23 of the oil pump 20 is disposed on the lower side of a passage 115 of the flow control valve 10, and the valve element 12 is disposed on the upper side of the driving member 23 of the oil pump 20. The oil pump 20 may be a centrifugal pump, and the driving member 23 of the oil pump 20 is an impeller. Alternatively, the oil pump 20 may be other suitable pumps, such as a gear pump, etc., and the driving member 23 of the oil pump 20 is accordingly other driving members.

[0045] In some embodiments of the present invention, referring to Figure 1 and Figure 2 , the flow control valve 10 further includes an internal passage member 16, the internal passage member 16 being disposed in the valve body 11, the passage 115 being formed between a first portion 11C of an inner wall of the valve body 11 and a second portion 16C of an outer wall of the internal passage member 16, the first portion 11C of the inner wall of the valve body 11 having a cylindrical surface, and the second portion 16C of the outer wall of the internal passage member 16 having a frustum of a cone surface, the internal passage member 16 being fixed on the drive shaft 22 of the oil pump 20 and disposed on the upper side of the driving member 23 of the oil pump 20; and the valve element 12 includes a plate-like third portion 121 extending in a plane perpendicular to the predetermined direction D, and when viewed in the predetermined direction D, the third portion 121 has an annular shape.

[0046] In some embodiments of the present invention, referring to Figure 1 and Figure 2 , the internal passage member 16 is fixed to the valve body 11.

[0047] Referring to Figure 2, when the motor of the compressor rotates, the transmission shaft 22 of the oil pump 20 rotates together with the drive shaft of the motor, driving the impeller to rotate. The lubricating oil flows into the oil pump 20 from the inlet 211 and flows out from the outlet 212 of the oil pump 20, enters the inlet 111 of the flow control valve 10, and flows through the passage 115. Thus, the valve element 12 is pushed upward. The elastic force of the elastic member 15 holds the valve element 12 in a predetermined position. The clearance between the valve element 12 and the second portion 16C of the outer wall of the internal passage member 16 limits the flow area. Different rotational speeds of the compressor cause the valve element 12 to be in different positions in the passage 115. The higher the rotational speed of the compressor, the smaller the flow area. Thus, regardless of the rotational speed, the flow rate of the lubricating oil supplied by the oil pump 20 will not change significantly, for example, it can be substantially stable.

[0048] Figure 3 and Figure 4 is a schematic diagram of a scroll compressor according to an embodiment of the present invention. Refer to Figure 3 and Figure 4 , the scroll compressor 1000 according to an embodiment of the present invention includes: a housing, the above-mentioned flow control valve 10, or the oil pump assembly 100 of the above-mentioned oil pump assembly; and a motor 4. The motor 4 includes: a stator 41; a rotor 42 disposed in the stator 41; and a drive shaft 3, and the rotor 42 is connected to the drive shaft 3. The drive shaft 3 includes: a first end 31; a second end 32; an oil supply passage 33 extending from the first end 31 to the second end 32 within the drive shaft 3; and a discharge passage 34 extending in a direction intersecting the axial direction of the drive shaft 3 and communicating with the oil supply passage 33. The oil supply passage 33 of the drive shaft 3 is in fluid communication with the outlet of the valve body of the flow control valve 10 at the first end 31 of the drive shaft 3. Refer to Figure 3 and Figure 4, according to an embodiment of the present invention, the scroll compressor 1000 further includes: a first bearing 61, a bracket 51, a second bearing 62, a balance weight 52, a moving scroll 53, and a stationary scroll 54. The first bearing 61 is disposed at the first end 31 of the drive shaft 3, and the motor 4 is disposed above the first bearing 61. The bracket 51 is disposed above the motor 4. The bracket 51 includes: a cup-shaped main body portion 510 and a hub portion 511 disposed at the lower portion of the main body portion 510. The hub portion 511 of the bracket 51 has a through hole 512. The second bearing 62 is disposed in the through hole 512 of the hub portion 511 of the bracket 51, and the drive shaft 3 is rotatably connected to the bracket 51 through the second bearing 62. The balance weight 52 is connected to the drive shaft 3 and is disposed in the main body portion 510 of the bracket 51. The moving scroll 53 includes: an end plate 531; and a hub portion 532 extending from one side of the end plate 531. The hub portion 532 and the end plate 531 define a blind hole 533. The second end 32 of the drive shaft 3 is inserted into the blind hole 533 and is connected to the hub portion 532 of the moving scroll 53. And the lower end surface of the end plate 531 of the moving scroll 53 contacts the upper end surface of the main body portion 510 of the bracket 51. The discharge passage 34 of the drive shaft 3 includes: a first discharge passage 34 leading to the first bearing 61; and a second discharge passage 34 leading to the second bearing 62. The discharge passage 34 of the drive shaft 3 may further include a third discharge passage 34 leading between the bracket 51 and the motor 4, whereby the motor 4 can be cooled.

[0049] See Figure 3 and Figure 4 , according to an embodiment of the present invention, there is a gap between the second end 32 of the drive shaft 3 and the inner wall of the blind hole 533, and there is a gap between the drive shaft 3 and the second bearing 62, such that the oil flowing out of the oil supply passage 33 of the drive shaft 3 at the second end 32 of the drive shaft 3 enters the main body portion 510, and a part of the oil flowing out of the second discharge passage 34 enters the main body portion 510. A part of the oil in the main body portion 510 enters between the lower end surface of the end plate 531 of the moving scroll 53 and the upper end surface of the main body portion 510 of the bracket 51 by the centrifugal force applied by the balance weight 52.

[0050] See Figure 4 , according to an embodiment of the present invention, the main body portion 510 of the bracket 51 has a through hole 4 at a predetermined height to limit the oil level in the main body portion 510 of the bracket 51.

[0051] In addition, for the scroll compressor according to an embodiment of the present invention, the flow rate of the lubricating oil supplied by the oil pump assembly to the internal components of the compressor is substantially stable. The scroll compressor may be a variable speed compressor.

[0052] See Figure 3 andFigure 4 , when the compressor 1000 is running, the motor 4 operates, the drive shaft 3 drives the moving scroll disk 53 to rotate, the moving scroll disk 53 cooperates with the stationary scroll disk 54 to compress the gaseous refrigerant, and at the same time the drive shaft 3 drives the oil pump 20 to operate, sucking oil from the oil sump at the bottom of the compressor into the oil supply passage 33 in the drive shaft 3. The oil rises along the oil supply passage 33 under the action of centrifugal force. The oil supply passage 33 has discharge passages at each bearing, and the oil enters the bearing from the discharge passage to ensure the lubrication of the bearing. The excess oil flows down from the top of the drive shaft 3 and is stored at the bottom of the frame 51. The balance weight 52 on the drive shaft 3 rotates under the drive of the drive shaft 3, and the balance weight 52 stirs the oil at the bottom of the frame 51. Under the action of centrifugal force, the oil enters the sliding bearing surfaces of the frame 51 and the moving scroll coil 53 to lubricate the contact surface between the frame 51 and the moving scroll coil 53. The excess oil returns to the oil sump through the oil holes provided in the frame 51.

[0053] By adopting the flow control valve of the embodiment of the present invention, the oil pump assembly having the flow control valve, and the scroll compressor having the flow control valve or the oil pump assembly, the structure of the oil pump is simplified, the cost of the oil pump is reduced, and at the same time the assembly process of the compressor is not changed. In addition, the supply of lubricating oil is more stable and can meet the requirements of a variable speed compressor. By changing a limited number of parts, the oil pump assembly in the embodiment of the present invention can be used for existing compressors.

Claims

1. A flow control valve that can be used in a compressor, comprising: A valve body having an inlet for fluid to flow into the valve body and an outlet for fluid to flow out of the valve body; A channel extending between the inlet and the outlet and along a predetermined direction, the area of a cross-section of the channel itself perpendicular to the predetermined direction being negatively correlated with the distance of the cross-section from the inlet; A valve element slidably disposed in the channel, the flow area between the valve element and the inner wall of the channel being negatively correlated with the distance of the valve element from the inlet, wherein the valve element can slide along the predetermined direction; And An elastic member disposed in the valve body to apply an elastic force to the valve element to move the valve element in a direction approaching the inlet.

2. The flow control valve according to claim 1, further comprising: An internal channel member disposed in the valve body, wherein the channel is formed between a first part of the inner wall of the valve body and a second part of the outer wall of the internal channel member, and the cross-section of the channel perpendicular to the predetermined direction is annular, and the top view of the valve element in the predetermined direction is annular, and the first part and the second part gradually approach in a direction away from the inlet.

3. The flow control valve according to claim 2, wherein: Both the annular shape of the channel and the annular shape of the valve element are circular, and the first part and the second part have a circular shape.

4. The flow control valve according to claim 3, wherein: One of the first part of the inner wall of the valve body and the second part of the outer wall of the internal channel member has a cylindrical surface, and the other of the first part of the inner wall of the valve body and the second part of the outer wall of the internal channel member has a frustum of a cone surface.

5. The flow control valve according to claim 4, wherein: The first part of the inner wall of the valve body has a cylindrical surface, and the second part of the outer wall of the internal channel member has a frustum of a cone surface, and the first part of the inner wall of the valve body serves as a guide for the valve element.

6. The flow control valve according to claim 4 or 5, wherein: The valve element includes: A plate-like third part extending in a plane perpendicular to the predetermined direction, and having an annular shape when viewed in the predetermined direction.

7. The flow control valve according to claim 6, wherein: The valve element further includes: An annular fourth part extending along the predetermined direction from the outer periphery of the third part, and the fourth part slides along the first part of the inner wall of the valve body.

8. The flow control valve according to claim 7, wherein: The fourth part of the valve element extends from the outer periphery of the third part in a direction away from the inlet.

9. The flow control valve according to claim 2, further comprising: A guide member disposed in the valve body to guide the valve element to slide along the guide member in the predetermined direction.

10. The flow control valve according to claim 9, wherein: The channel is formed in the first part of the inner wall of the valve body, and the first part of the inner wall of the valve body gradually approaches the center line of the first part of the inner wall of the valve body in a direction away from the inlet.

11. The flow control valve according to claim 10, wherein: In a cross-section perpendicular to a predetermined direction, the first part of the inner wall of the valve body has a circular shape, and when viewed in the predetermined direction, the outer periphery of the valve element has a circular shape.

12. The flow control valve according to claim 11, wherein: The first part of the inner wall of the valve body has a frustum conical surface.

13. The flow control valve according to claim 12, wherein: The valve element includes: A plate-shaped third part extending in a plane perpendicular to the predetermined direction, and having a circular shape when viewed in the predetermined direction.

14. The flow control valve according to claim 13, wherein: The valve element has a central hole, the guide member has a rod shape, and passes through the central hole of the valve element to guide the valve element to slide along the guide member in the predetermined direction.

15. The flow control valve according to claim 1, wherein: The elastic member is provided on a side of the valve element away from the inlet, and is a helical spring, and the valve element is connected to the upper side of the driving member of the oil pump.

16. An oil pump assembly for a scroll compressor, comprising: An oil pump; The oil pump has an inlet and an outlet; And The flow control valve according to any one of claims 1-15, wherein the inlet of the flow control valve is in communication with the outlet of the oil pump.

17. The oil pump assembly for a scroll compressor according to claim 16, wherein: The oil pump has a transmission shaft; and a driving member, the driving member is coupled to the transmission shaft to drive oil to flow into the oil pump from the inlet and flow out from the outlet of the oil pump.

18. The oil pump assembly for a scroll compressor according to claim 17, wherein: The transmission shaft of the oil pump extends in the predetermined direction and passes through the flow control valve, the driving member of the oil pump is provided on the lower side of the channel of the flow control valve, and the valve element is provided on the upper side of the driving member of the oil pump.

19. The oil pump assembly for a scroll compressor according to claim 18, wherein: The flow control valve further includes an internal channel member, the internal channel member is provided in the valve body, the channel is formed between a first part of the inner wall of the valve body and a second part of the outer wall of the internal channel member, the first part of the inner wall of the valve body has a cylindrical surface, and the second part of the outer wall of the internal channel member has a frustum conical surface, the internal channel member is fixed on the transmission shaft of the oil pump and is provided on the upper side of the driving member of the oil pump; And The valve element includes a plate-shaped third part extending in a plane perpendicular to the predetermined direction, and having an annular shape when viewed in the predetermined direction.

20. The oil pump assembly for a scroll compressor according to claim 17, wherein: The oil pump is a centrifugal pump, and the driving member of the oil pump is an impeller.

21. A scroll compressor, comprising: The flow control valve according to any one of claims 1-15, or the oil pump assembly for a scroll compressor according to any one of claims 16-20, and A motor, the motor comprising: a stator; a rotor disposed in the stator; and a drive shaft, the rotor being connected to the drive shaft, Wherein the drive shaft comprises: a first end; a second end; an oil supply passage extending from the first end to the second end within the drive shaft; and a discharge passage extending in a direction intersecting the axial direction of the drive shaft and communicating with the oil supply passage, and Wherein the oil supply passage of the drive shaft is in fluid communication with the outlet of the valve body of the flow control valve at the first end of the drive shaft.

22. The scroll compressor according to claim 21, further comprising: A first bearing disposed at the first end of the drive shaft, the motor being disposed above the first bearing; A bracket disposed above the motor, the bracket comprising: a cup-shaped main body portion and a hub portion disposed at the lower portion of the main body portion, the hub portion of the bracket having a through hole; A second bearing disposed in the through hole of the hub portion of the bracket, the drive shaft being rotatably connected to the bracket through the second bearing; A balance weight, the balance weight being connected to the drive shaft and disposed in the main body portion of the bracket; and A moving scroll plate, the moving scroll plate comprising: an end plate; and a hub portion extending from one side of the end plate, the hub portion and the end plate defining a blind hole, the second end of the drive shaft being inserted into the blind hole and connected to the hub portion of the moving scroll plate, and the lower end surface of the end plate of the moving scroll plate being in contact with the upper end surface of the main body portion of the bracket, Wherein the discharge passage of the drive shaft comprises: a first discharge passage leading to the first bearing; and a second discharge passage leading to the second bearing.

23. The scroll compressor according to claim 22, wherein: The discharge passage of the drive shaft further comprises a third discharge passage leading between the bracket and the motor.

24. The scroll compressor according to claim 22, wherein: There is a gap between the second end of the drive shaft and the inner wall of the blind hole, and there is a gap between the drive shaft and the second bearing, such that the oil flowing out of the oil supply passage of the drive shaft at the second end of the drive shaft enters the main body portion, and a part of the oil flowing out of the second discharge passage enters the main body portion, and a part of the oil in the main body portion enters between the lower end surface of the end plate of the moving scroll plate and the upper end surface of the main body portion of the bracket by the centrifugal force applied by the balance weight.

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