compressor

Abstract

This utility model belongs to the field of compressor technology and discloses a compressor including a housing, a drive shaft, an oil pump, and a valve plate. The housing has an oil storage chamber, the drive shaft has an oil passage, the rotor of the oil pump is connected to the drive shaft, and the oil pump is used to pressurize the lubricating oil in the oil storage chamber and deliver it to the oil passage. The housing of the oil pump has an oil drain hole, which discharges part of the pressurized lubricating oil to the oil storage chamber. One end of the valve plate is installed on the housing of the oil pump, and the other end of the valve plate can be displaced under the action of the oil pressure in the oil passage to make the oil drain hole open or closed. When the compressor is running at low speed, the valve plate always blocks the oil drain hole to avoid poor lubrication of the moving parts of the scroll compressor. When the compressor is running at high speed, the oil drain hole of the valve plate is connected to the oil storage chamber, so that part of the lubricating oil in the oil passage returns to the oil storage chamber through the oil drain hole to reduce the oil pressure inside the oil passage, thereby stabilizing the force on the scroll compressor and ensuring the normal operation and continuous stability of the scroll compressor.

Description

Technical Field

[0001] This utility model relates to the field of compressor technology, and in particular to compressors. Background Technology

[0002] A scroll compressor is a positive displacement compressor capable of intake, compression, and discharge of gas. It boasts advantages such as high efficiency, low noise, low vibration, compact structure, and high reliability. The drive shaft oil pump assembly is the core power component of the lubrication system, integrated at the bottom of the drive shaft. The motor drives the drive shaft to rotate, and the oil pump at the bottom of the drive shaft rotates synchronously. The pump draws oil from the oil sump, and the lubricating oil is delivered to various lubrication points through the axial oil passages of the drive shaft.

[0003] For variable frequency scroll compressors, when the compressor operates at high speed, the oil supply is relatively large, which generates a significant floating force on the moving scroll, causing instability in the scroll's force distribution. To solve this problem, such as... Figure 1 As shown, a transverse oil drain hole 102 is provided on the oil passage 101 of the drive shaft 100. The oil drain hole 102 can reduce the oil supply, thereby reducing the floating force on the scroll compressor. However, when the oil pump 200 of the scroll compressor is running at a low speed, it is easy to cause insufficient oil supply to the scroll compressor, thus affecting the normal operation of the compressor.

[0004] Therefore, there is an urgent need for a compressor to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a compressor that avoids poor lubrication of moving parts at low speeds in a scroll compressor, ensuring the normal operation of the scroll compressor, and reducing the oil pressure inside the compressor's oil passages, thus stabilizing the force on the scroll.

[0006] To address the aforementioned problems in the existing technology, the present invention adopts the following technical solution:

[0007] Compressor, including:

[0008] The outer casing has an oil storage cavity;

[0009] A drive shaft is disposed within the housing and has an oil passage.

[0010] An oil pump, the rotor of which is connected to the drive shaft, is used to pressurize the lubricating oil in the oil storage chamber and deliver it to the oil passage. The housing of the oil pump is provided with an oil drain hole communicating with the oil passage.

[0011] A valve plate, one end of which is mounted on the housing of the oil pump, and the other end of which can be displaced under the action of oil pressure in the oil passage to make the oil drain hole open or closed.

[0012] Preferably, the valve plate includes a fixed end and a movable end connected together, the fixed end is mounted on the housing of the oil pump, the housing of the oil pump has a sealing end face, and the outlet of the oil drain hole extends through the sealing end face;

[0013] When the oil drain hole is in the closed state, the movable end has a force applied to the sealing end face, so that the movable end fits against the sealing end face to close the oil drain hole.

[0014] Preferably, when the oil drain hole is in the closed state, the valve plate has elastic bending deformation to apply force to the sealing end face.

[0015] Preferably, the outer wall of the oil pump housing is provided with a groove, the fixed end is disposed in the groove, and the fixed end is pressed against the bottom wall of the groove;

[0016] The sealing end face is formed on one side wall of the groove; or, the bottom wall of the groove is provided with a boss, and the sealing end face is formed on the end face of the boss away from the bottom wall of the groove.

[0017] Preferably, the fixed end is pressed against the outer wall of the housing, the outer wall of the housing is provided with a boss, and the sealing end face is formed on the end face of the boss away from the outer wall of the housing.

[0018] Preferably, the surface on the housing that is pressed against the fixed end is the mounting surface, and the angle between the sealing end face and the mounting surface is an obtuse angle;

[0019] The sealing end face has a first end and a second end that are disposed opposite to each other. The first end is closer to the mounting surface than the second end. The angle between the extension direction from the first end to the second end and the oil outlet direction of the oil drain hole is an acute angle, so that the movable end can fit against the sealing end face.

[0020] Preferably, the oil drain hole is located at the bottom of the oil pump housing.

[0021] Preferably, the compressor further includes a valve plate, which is fixedly mounted on the housing of the oil pump, and the valve plate is used to mount the valve plate on the housing of the oil pump.

[0022] Preferably, the valve plate has a limiting surface located on the side of the valve disc away from the oil drain hole, and the limiting surface is used to limit the swing amplitude of the valve disc.

[0023] Preferably, the compressor further includes fasteners, the valve plate has a connecting hole, the valve disc has a fixing hole, and the fasteners pass through the connecting hole and the fixing hole in sequence and are fixedly connected to the housing of the oil pump.

[0024] The beneficial effects of this utility model are as follows:

[0025] The compressor provided in this embodiment has an oil storage chamber in its housing, and a drive shaft is disposed within the housing, with an oil passage provided on the drive shaft. The rotor of an oil pump is connected to the drive shaft, and the oil pump pressurizes the lubricating oil in the oil storage chamber and delivers it to the oil passage. The oil pump housing has an oil drain hole communicating with the oil passage, which discharges a portion of the pressurized lubricating oil into the oil storage chamber. One end of a valve plate is mounted on the oil pump housing, and the other end of the valve plate can be displaced under the oil pressure in the oil passage to open or close the oil drain hole. When the scroll compressor operates at low speed, the valve plate always blocks the oil drain hole, keeping it closed. All the lubricating oil in the oil passage is pumped to the moving parts of the compressor, ensuring that the oil pump delivers sufficient lubricating oil to the moving parts of the scroll compressor for lubrication under low-speed conditions, thus preventing poor lubrication of the scroll compressor's moving parts. When the scroll compressor is running at high speed, if the oil pressure in the oil passage exceeds a certain level, the valve plate will be displaced under the action of the oil pressure in the oil passage, connecting the oil drain hole with the oil storage chamber. The oil drain hole is in the open state, allowing some of the lubricating oil in the oil passage to return to the oil storage chamber through the oil drain hole, thereby reducing the oil pressure inside the oil passage. This stabilizes the force on the scroll compressor and ensures the normal operation and continuous stability of the scroll compressor. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the structure of an existing compressor;

[0027] Figure 2 This is a schematic diagram of the compressor provided in Embodiment 1 of the present utility model;

[0028] Figure 3 This is a schematic diagram of the compressor with the valve plate in the open position according to Embodiment 1 of this utility model;

[0029] Figure 4 This is a schematic diagram of the compressor with the valve plate closed, provided in Embodiment 1 of this utility model;

[0030] Figure 5 This is a schematic diagram of the compressor with the valve plate closed, provided in Embodiment 2 of this utility model;

[0031] Figure 6 This is a schematic diagram of the compressor with the valve plate in the open position according to Embodiment 2 of this utility model;

[0032] Figure 7 This is a schematic diagram of the compressor provided in Embodiment 3 of this utility model.

[0033] Figure label:

[0034] 100. Drive shaft; 101. Oil passage; 102. Oil drain hole; 200. Oil pump; 201. Housing; 202. Rotor;

[0035] 1. Outer shell; 11. Oil reservoir;

[0036] 2. Drive shaft; 21. Oil passage;

[0037] 3. Rotor;

[0038] 4. Housing; 41. Oil drain hole; 42. Sealing end face; 421. First end; 422. Second end; 43. Mounting surface; 44. Groove;

[0039] 5. Valve plate; 51. Fixed end; 52. Movable end;

[0040] 6. Boss;

[0041] 7. Valve plate; 71. Limiting surface;

[0042] 8. Fasteners. Detailed Implementation

[0043] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, not the entire structure.

[0044] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0046] In the description of this embodiment, the terms "upper," "lower," "left," and "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0047] Example 1

[0048] like Figures 2-4 As shown, in this embodiment, the compressor includes a housing 1, a drive shaft 2, an oil pump, and a valve plate 5. The housing 1 has an oil storage chamber 11, and the drive shaft 2 is disposed within the housing 1, with an oil passage 21. The rotor 3 of the oil pump is connected to the drive shaft 2, and the oil pump pressurizes the lubricating oil in the oil storage chamber 11 and delivers it to the oil passage 21. The housing 4 of the oil pump has an oil drain hole 41 communicating with the oil storage chamber 11, which drains a portion of the pressurized lubricating oil into the oil storage chamber 11. One end of the valve plate 5 is mounted on the housing 4 of the oil pump, and the other end of the valve plate 5 can be displaced under the oil pressure in the oil passage 21 to open or close the oil drain hole 41.

[0049] For example, the drive shaft 2 extends vertically and has an axial oil passage 21 extending along its own axis. The bottom of the drive shaft 2 is connected to the rotor 3 of the oil pump. The bottom cavity of the housing 1 forms an oil storage chamber 11.

[0050] The oil pump is submerged in the oil storage chamber 11. Under the action of the oil pump, the lubricating oil in the oil storage chamber 11 is pressurized and pumped into the oil passage 21 to lubricate the moving parts of the scroll compressor.

[0051] The oil pump housing 4 has an oil drain hole 41 that communicates with the oil passage 21. When the scroll compressor is running at low speed, the oil pressure in the oil passage 21 is small and insufficient to cause the valve plate 5 to move and open the oil drain hole 41. That is, the valve plate 5 always blocks the oil drain hole 41, and the oil drain hole 41 is in the closed state. The valve plate 5 disconnects the oil drain hole 41 from the oil storage chamber 11, and all the lubricating oil in the oil passage 21 is pumped to the moving parts of the compressor. This ensures that the oil pump delivers enough lubricating oil to the moving parts of the scroll compressor for lubrication under low speed conditions, and avoids poor lubrication of the moving parts of the scroll compressor.

[0052] The higher the rotational speed of the scroll compressor, the greater the oil pressure in oil passage 21, and the greater the force exerted by the lubricating oil in oil passage 21 on valve plate 5. When the oil pressure in oil passage 21 exceeds a certain level, valve plate 5 will be displaced under the action of the oil pressure in oil passage 21, causing oil drain hole 41 to open. This allows some of the lubricating oil in oil passage 21 to return to oil storage chamber 11 through oil drain hole 41, thereby reducing the oil pressure inside oil passage 21. This stabilizes the force on the scroll compressor, ensuring its normal operation and continuous stability.

[0053] Furthermore, refer to Figures 2-4 The valve plate 5 includes a fixed end 51 and a movable end 52 connected together. The fixed end 51 is installed on the housing 4 of the oil pump. The housing 4 of the oil pump has a sealing end face 42. The outlet of the oil drain hole 41 extends through the sealing end face 42. When the oil drain hole 41 is in the closed state, the movable end 52 has a force applied to the sealing end face 42, so that the movable end 52 fits against the sealing end face 42 to close the oil drain hole 41.

[0054] The movable end 52 applies a force F1 to the sealing end face 42, so that the movable end 52 can keep in contact with the sealing end face 42 under this force F1, thereby making the movable end 52 disconnect the oil drain hole 41 from the oil storage chamber 11, that is, the movable end 52 closes the oil drain hole 41.

[0055] Only when the force F2 exerted by the pressurized lubricating oil in the drain hole 41 on the movable end 52 is greater than F1, will the movable end 52 generate displacement to connect the drain hole 41 with the oil storage chamber 11, that is, the movable end 52 will open the drain hole 41.

[0056] This configuration not only ensures that the movable end 52 keeps the drain hole 41 closed when the oil pressure in the oil passage 21 is lower than the set oil pressure, but also ensures that the movable end 52 opens the drain hole 41 when the oil pressure in the oil passage 21 is greater than or equal to the set oil pressure.

[0057] Furthermore, refer to Figures 2-4 When the drain hole 41 is closed, the valve plate 5 has elastic bending deformation to apply force to the sealing end face 42.

[0058] For example, the valve plate 5 is a thin plate capable of elastic deformation, such as a thin steel sheet, which is low in cost. With the above configuration, when the movable end 52 closes the oil drain hole 41, the valve plate 5 has a certain elastic bending deformation. This bending deformation allows the movable end 52 to apply force to the sealing end face 42 to fit against the sealing end face 42, thereby improving the sealing reliability of the valve plate 5 to the oil drain hole 41.

[0059] As an alternative, the movable end 52 can be rotatably connected to the fixed end 51, and an elastic element such as a spring can be provided to the movable end 52. The spring applies a force to the movable end 52, so that when the oil pressure in the oil passage 21 is low, the movable end 52 applies a force to the sealing end face 42 to fit against the sealing end face 42. When the oil pressure in the drain hole 41 is high, the lubricating oil in the drain hole 41 applies a force to the movable end 52, causing the movable end 52 to rotate relative to the fixed end 51 to open the drain hole 41. During this process, the elastic element accumulates a force that causes the movable end 52 to rotate relative to the fixed end 51 to close the drain hole 41, so that when the oil pressure in the drain hole 41 decreases to a certain level, the movable end 52 rotates relative to the fixed end 51 under the action of the elastic element to close the drain hole 41.

[0060] It should be noted that the drain hole 41 can also be configured as a stepped hole, with the small-diameter end of the stepped hole communicating with the oil passage 21 and the large-diameter end communicating with the oil reservoir 11. The valve plate 5 is installed in the large-diameter hole of the stepped hole, and the stepped surface of the stepped hole forms the aforementioned sealing end face 42. The valve plate 5 is configured to move along its own thickness direction, and an elastic element is provided on one side of the valve plate 5. When the oil pressure in the oil passage 21 is low, the valve plate 5 applies a force to the sealing end face 42 to fit against it. When the oil pressure in the drain hole 41 is high, the lubricating oil in the drain hole 41 applies a force to the valve plate 5, allowing the valve plate 5 to move axially to open the drain hole 41. During this process, the elastic element accumulates a force that causes the valve plate 5 to move and close the drain hole 41, so that when the oil pressure in the drain hole 41 decreases to a certain level, the valve plate 5 moves under the action of the elastic element to close the drain hole 41.

[0061] Furthermore, refer to Figures 2-4 The outer wall of the oil pump housing 4 is provided with a groove 44, and the fixed end 51 is located in the groove 44 and is pressed against the bottom wall of the groove 44. The sealing end face 42 is formed on one side wall of the groove 44. In other words, the outlet of the oil drain hole 41 extends to one side wall of the groove 44, so that there is a distance difference between the mounting surface 43 and the outlet of the oil drain hole 41 along the oil discharge direction of the oil drain hole 41, thereby making the valve plate 5 have a certain elastic bending deformation to improve the sealing effect when the movable end 52 closes the oil drain hole 41.

[0062] Furthermore, the surface of the housing 4 that presses against the fixed end 51 is the mounting surface 43. The angle between the sealing end face 42 and the mounting surface 43 is an obtuse angle. The sealing end face 42 has a first end 421 and a second end 422 that are arranged opposite to each other. The first end 421 is closer to the mounting surface 43 than the second end 422. The angle between the extension direction from the first end 421 to the second end 422 and the oil outlet direction of the oil drain hole 41 is an acute angle, so that the movable end 52 can fit against the sealing end face 42. This arrangement not only enables the valve plate 5 to undergo a certain elastic bending deformation using the sealing end face 42 to block the outlet of the oil drain hole 41, thereby improving the sealing reliability of the valve plate 5 when closing the oil drain hole 41, but also facilitates the movable end 52 to fit against the sealing end face 42 to close the oil drain hole 41.

[0063] Furthermore, referring to Figures 2-4 The compressor also includes a valve plate 7, which is fixedly mounted on the housing 4 of the oil pump. The valve plate 7 is used to mount the valve plate 5 on the housing 4 of the oil pump.

[0064] Taking the valve plate 5 as an example, which is a thin plate capable of elastic deformation, the valve plate 5 is roughly V-shaped, with the movable end 52 and the fixed end 51 arranged at an obtuse angle.

[0065] Specifically, the movable end 52 is clamped between the valve plate 7 and the mounting surface 43. The compressor also includes a fastener 8. The valve plate 7 has a connecting hole, and the valve plate 5 has a fixing hole. The fastener 8 passes through the connecting hole and the fixing hole in sequence and is threaded to the housing 4 of the oil pump.

[0066] Under the action of fastener 8, the fixed ends 51 of valve plate 7 and valve disc 5 are fixed to the housing 4 of oil pump in sequence. That is, valve disc 5 and valve plate 7 are detachably connected to the housing 4 of oil pump through fastener 8, which can realize quick disassembly and assembly, and facilitate the replacement of valve disc 5 and valve plate 7.

[0067] As an alternative, the valve plate 7 can be removed, and the fixed end 51 of the valve piece 5 can be welded or glued to the mounting surface 43.

[0068] Furthermore, referring to Figures 2-4 The valve plate 7 has a limiting surface 71, which is located on the side of the valve plate 5 away from the oil drain hole 41. The limiting surface 71 is used to limit the swing amplitude of the valve plate 5.

[0069] Based on the oil pressure in the drain hole 41, the movable end 52 of the valve plate 5 can move between the limiting surface 71 and the sealing end face 42, thereby opening and closing the drain hole 41. The limiting surface 71 can limit the valve plate 5. When the oil pressure in the drain hole 41 is too high instantaneously, that is, when the instantaneous oil pressure in the drain hole 41 is much greater than the elastic force of the valve plate 5, it prevents the valve plate 5 from swinging too much, which would cause the elasticity of the valve plate 5 to fail, thus preventing the valve plate 5 from closing the drain hole 41 and affecting the oil supply regulation of the compressor.

[0070] Furthermore, the drain hole 41 is located at the bottom of the pump housing 4, facilitating the installation of the valve plate 5 and the machining of the drain hole 41. Alternatively, the drain hole 41 can also be located on the side wall of the pump housing 4.

[0071] Example 2

[0072] This embodiment provides a compressor, such as Figures 5-6 As shown, its structure is basically the same as that in Embodiment 1, except that:

[0073] In this embodiment, the fixed end 51 is pressed against the outer wall of the housing 4, and the outer wall of the housing 4 is provided with a boss 6. The sealing end face 42 is formed on the end face of the boss 6 away from the outer wall of the housing 4. This results in a distance difference between the mounting surface 43 and the sealing end face 42 along the oil discharge direction of the oil drain hole 41, thereby allowing the valve plate 5 to have a certain elastic bending deformation, so as to improve the sealing effect when the movable end 52 closes the oil drain hole 41.

[0074] Example 3

[0075] This embodiment provides a compressor, such as Figure 7 As shown, its structure is basically the same as that in Embodiment 1, except that:

[0076] In this embodiment, a boss 6 is provided on the bottom wall of the groove 44, and a sealing end face 42 is formed on the end face of the boss 6 away from the bottom wall of the groove 44, so that there is a distance difference between the mounting surface 43 and the sealing end face 42 along the oil discharge direction of the oil drain hole 41, thereby making the valve plate 5 have a certain elastic bending deformation when the movable end 52 closes the oil drain hole 41, so as to improve the sealing effect when the movable end 52 closes the oil drain hole 41.

[0077] As an alternative, a groove 44 can be formed on the outer wall of the oil pump housing 4. While the bottom wall of the groove 44 forms the mounting surface 43, a boss 6 is protruded on the outer wall of the oil pump housing 4, so that the sealing end face 42 is formed on the end face of the boss 6 away from the bottom wall of the groove 44.

[0078] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating the present utility model, and are not intended to limit the implementation of the present utility model. Those skilled in the art can make various obvious changes, readjustments, and substitutions without departing from the protection scope of this utility model. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. Compressor, characterized in that, include: The outer casing (1) has an oil storage cavity (11); A drive shaft (2) is disposed inside the housing (1), and the drive shaft (2) is provided with an oil passage (21); An oil pump, the rotor (3) of which is connected to the drive shaft (2), and the oil pump is used to pressurize the lubricating oil in the oil storage chamber (11) and deliver it to the oil passage (21). The housing (4) of the oil pump is provided with an oil drain hole (41) that communicates with the oil passage (21). A valve plate (5) is installed at one end on the housing (4) of the oil pump. The other end of the valve plate (5) can be displaced under the action of oil pressure in the oil passage (21) so that the oil drain hole (41) is in an open or closed state.

2. The compressor of claim 1, wherein, The valve plate (5) includes a fixed end (51) and a movable end (52) connected together. The fixed end (51) is installed on the housing (4) of the oil pump. The housing (4) of the oil pump has a sealing end face (42). The outlet of the oil drain hole (41) extends through the sealing end face (42). When the drain hole (41) is closed, the movable end (52) applies a force to the sealing end face (42), causing the movable end (52) to fit against the sealing end face (42) to close the drain hole (41).

3. The compressor of claim 2, wherein, When the drain hole (41) is closed, the valve plate (5) has elastic bending deformation to apply force to the sealing end face (42).

4. The compressor of claim 3, wherein, The outer wall of the housing (4) of the oil pump is provided with a groove (44), and the fixed end (51) is provided in the groove (44) and the fixed end (51) is pressed against the bottom wall of the groove (44); The sealing end face (42) is formed on a side wall of the groove (44); or, a boss (6) is provided on the bottom wall of the groove (44), and the sealing end face (42) is formed on the end face of the boss (6) away from the bottom wall of the groove (44).

5. The compressor of claim 3, wherein, The fixed end (51) is pressed against the outer wall of the housing (4), and the outer wall of the housing (4) is provided with a boss (6). The sealing end face (42) is formed on the end face of the boss (6) away from the outer wall of the housing (4).

6. The compressor of claim 4 or 5, wherein, The surface on the housing (4) that is pressed against the fixed end (51) is the mounting surface (43), and the angle between the sealing end face (42) and the mounting surface (43) is an obtuse angle; The sealing end face (42) has a first end (421) and a second end (422) disposed opposite to each other. The first end (421) is closer to the mounting surface (43) than the second end (422). The angle between the extension direction from the first end (421) to the second end (422) and the oil discharge direction of the oil drain hole (41) is an acute angle, so that the movable end (52) can fit against the sealing end face (42).

7. The compressor according to any one of claims 1 to 5, characterized in that, The drain hole (41) is located at the bottom of the housing (4) of the oil pump.

8. The compressor of any one of claims 1 to 5, wherein, The compressor also includes a valve plate (7), which is fixedly installed on the housing (4) of the oil pump. The valve plate (7) is used to install the valve plate (5) on the housing (4) of the oil pump.

9. The compressor of claim 8, wherein, The valve plate (7) has a limiting surface (71) located on the side of the valve piece (5) away from the oil drain hole (41), and the limiting surface (71) is used to limit the swing amplitude of the valve piece (5).

10. The compressor of claim 8, wherein, The compressor also includes a fastener (8), the valve plate (7) has a connecting hole, the valve plate (5) has a fixing hole, and the fastener (8) passes through the connecting hole and the fixing hole in sequence and is fixedly connected to the housing (4) of the oil pump.

Images