Rotary compressor

Abstract

The application discloses a rotor compressor, which comprises a shell, a partition, a motor, a pump body assembly and a power assembly, the shell has a cavity, the partition is arranged in the cavity and is used for separating the cavity into a low-pressure cavity and a high-pressure cavity, the partition is provided with a first shaft hole, the bottom of the partition is provided with a first oil inlet, the pump body assembly comprises a cylinder structure and a crankshaft, the cylinder structure is installed on the eccentric part of the crankshaft, the crankshaft is suitable for being in transmission connection with the rotor of the motor through the first shaft hole, the pump body assembly is formed with an oil passing channel, one end of the oil passing channel is in communication with the first oil inlet, and the other end of the oil passing channel is suitable for being in communication with the low-pressure cavity through the gap between the cylinder structure and the crankshaft, and the power assembly is used for making the medium flow from the first oil inlet to the oil passing channel. According to the rotor compressor, the recycling of lubricating oil is realized through the oil passing channel, the discharge of lubricating oil along with gas can be reduced, the oil storage amount in the rotor compressor can be well ensured, and the oil carrying amount of the rotor compressor can be reduced.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to a rotary compressor. Background Technology

[0002] In related technologies, the oil sump of the lubricating oil in horizontal compressors is often located in the high-pressure chamber. The lubricating oil enters the gap between the components along with the exhaust gas to lubricate them. Under the action of exhaust pressure, the gas easily carries the oil out of the compressor. As the compressor continues to run, the amount of oil lost accumulates. When the oil level is lower than the critical lubrication threshold, the frictional resistance between the moving parts increases. This not only aggravates the wear of the rotor and bearings and shortens the service life of the compressor, but also damages the sealing effect of the gaps between the components, causing gas leakage in the high-pressure chamber and reducing the volumetric efficiency of the compressor. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a rotary compressor that achieves lubricating oil recycling through an oil passage design, thereby reducing lubricating oil discharge with the gas, ensuring adequate oil storage within the rotary compressor, and reducing the amount of oil carried over by the rotary compressor.

[0004] According to an embodiment of the present invention, a rotary compressor includes: a housing having a cavity; a partition disposed in the cavity to divide the cavity into a low-pressure chamber and a high-pressure chamber, the partition having a first shaft hole and a first oil inlet at its bottom; a motor disposed in the low-pressure chamber; a pump assembly disposed in the high-pressure chamber, the pump assembly including a cylinder structure and a crankshaft, the cylinder structure being mounted on an eccentric portion of the crankshaft, the crankshaft being adapted to pass through the first shaft hole and be drively connected to the rotor of the motor, the pump assembly forming an oil passage, one end of the oil passage communicating with the first oil inlet, and the other end being adapted to communicate with the low-pressure chamber through a gap between the cylinder structure and the crankshaft; and a power assembly for causing a medium to flow from the first oil inlet toward the oil passage.

[0005] According to an embodiment of the rotary compressor of the present invention, by constructing an oil passage within the cylinder structure and providing a first oil inlet at the bottom of the separator, lubricating oil can enter from the low-pressure chamber into the oil passage. The oil passage can deliver the lubricating oil to the various components of the cylinder structure for lubrication, and then collect it back into the low-pressure chamber, where it gathers at the bottom, thereby achieving the recycling of lubricating oil. This effectively avoids the increase in frictional resistance of moving parts caused by lubricating oil loss, thus reducing wear between moving parts and improving the service life of the rotary compressor. Furthermore, by designing an oil passage to achieve lubricating oil recycling, the present invention reduces the amount of lubricating oil discharged with the gas, effectively ensuring the amount of oil stored in the rotary compressor and reducing the amount of oil carried by the rotary compressor.

[0006] In addition, the rotary compressor according to the present invention may also have the following additional technical features: In some embodiments of the present invention, the oil passage includes a first passage and a second passage. The first passage is disposed on the crankshaft and extends along the axial direction of the crankshaft. The crankshaft is provided with a plurality of oil passage holes communicating with the first passage. The second passage is disposed between the crankshaft and the cylinder structure.

[0007] In some embodiments of the present invention, the cylinder structure includes: a first cover, a second cover, and a cylinder. Along the axial direction of the crankshaft, the first cover and the second cover are respectively located on both sides of the cylinder. The first cover is connected to the separator. The first cover is provided with a second shaft hole, and the second cover is provided with a third shaft hole. The crankshaft is adapted to pass through the second shaft hole and the third shaft hole. The inner wall of the second shaft hole is provided with a first groove extending axially, and the second channel includes the first groove.

[0008] In some embodiments of the present invention, the first groove extends downward in the direction from the high-pressure chamber to the low-pressure chamber.

[0009] In some embodiments of the present invention, the oil passage includes a first oil passage opposite to the first cover, a second oil passage opposite to the cylinder, and a third oil passage opposite to the second cover.

[0010] In some embodiments of the present invention, the third shaft hole is a blind hole facing the crankshaft, the end face of the crankshaft is spaced apart from the bottom wall of the third shaft hole, the end face of the crankshaft forms a second oil inlet, the second cover forms a radially extending third channel, the third channel communicates with the third shaft hole, and the rotor compressor further includes a first connecting pipe, the two ends of the first connecting pipe being respectively connected to the first oil inlet and the third channel.

[0011] In some embodiments of the present invention, the inner wall of the third shaft hole is formed with a second groove extending axially, and the second groove communicates with the third channel.

[0012] In some embodiments of the present invention, the third shaft hole is a through hole that penetrates the second cover along the axial direction of the crankshaft. The rotor compressor further includes an oil suction hood and a second connecting pipe. The oil suction hood covers the third shaft hole, and the two ends of the second connecting pipe are respectively connected to the first oil inlet and the oil suction hood.

[0013] In some embodiments of the present invention, the power assembly includes an oil guide plate, which has a spiral structure and is disposed in the first channel to drive the flow of the medium when the crankshaft rotates.

[0014] In some embodiments of the present invention, the first cover has a protrusion on the side facing the separator, the protrusion passing through the first shaft hole, and the rotor compressor further includes a seal, the seal being disposed between the protrusion and the inner wall of the first shaft hole.

[0015] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0016] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of a rotary compressor according to some embodiments of the present invention.

[0017] Figure 2 yes Figure 1 A cross-sectional view along line AA.

[0018] Figure 3 This is a cross-sectional view of the first cover body according to some embodiments of the present invention.

[0019] Figure 4 This is a cross-sectional view of a crankshaft according to some embodiments of the present invention.

[0020] Figure 5 This is a cross-sectional view of the second cover body according to some embodiments of the present invention.

[0021] Figure 6 This is a cross-sectional view of a rotary compressor according to some embodiments of the present invention.

[0022] Figure label: 100. Rotary compressor; 1. Housing; 11. Separator; 111. First shaft hole; 112. First oil inlet; 113. Protrusion; 12. Low-pressure chamber; 13. High-pressure chamber; 2. Motor; 21. Motor rotor; 3. Pump body assembly; 31. Cylinder structure; 311. First cover; 3111. Second shaft hole; 3112. First groove; 312. Second cover; 3121. Third shaft hole; 3120. Second groove; 3122. Third channel; 3123. Plug; 313. Cylinder; 32. Crankshaft; 321. Eccentric part; 322. Oil passage hole; 323. Second oil inlet; 41. First channel; 51. First connecting pipe; 52. Second connecting pipe; 6. Oil suction cover; 7. Power assembly; 81. Seal. Detailed Implementation

[0023] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0024] In the description of this invention, it should be understood that the terms "upper," "lower," "front," "rear," "left," and "right," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, 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 the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0025] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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 invention according to the specific circumstances.

[0026] Current vehicle-mounted electric compressors use scroll compressors. Scroll compressors have the following main disadvantages: the scroll plate requires high manufacturing precision, and fault diagnosis and repair of scroll compressors are relatively difficult. Compared to scroll compressors, rotary compressors have the characteristics of small size, high energy efficiency, fewer vulnerable parts, simple structure, and low cost, and are becoming increasingly popular. Rotary compressors have now expanded from the household air conditioning field to vehicle air conditioning. In horizontal rotary compressors, the refrigerant oil is generally located on the high-pressure side. After lubrication, the lubricating oil is generally discharged with the exhaust. Of course, gas carrying lubricating oil may also enter from the intake. However, when adverse conditions affect the amount of lubricating oil carried by the gas, the amount of oil inside the compressor will decrease, which can easily affect the operation of the rotary compressor.

[0027] For vehicle-mounted rotary compressors, this application constructs an oil passage within the cylinder structure and provides a first oil inlet at the bottom of the separator, allowing lubricating oil to enter from the low-pressure chamber into the oil passage. The oil passage delivers the lubricating oil to the various components of the cylinder structure for lubrication, and then it re-collects in the low-pressure chamber, gathering at the bottom of the low-pressure chamber. This achieves the recycling of lubricating oil, effectively preventing the increase in frictional resistance of moving parts caused by lubricating oil loss, thereby reducing wear between moving parts and improving the service life of the rotary compressor.

[0028] The following is for reference. Figures 1-6 A rotary compressor 100 according to an embodiment of the present invention is described.

[0029] like Figure 1 and Figure 2 , Figure 4 As shown, the rotary compressor 100 according to an embodiment of the present invention includes a housing 1, a partition 11, a motor 2, a pump assembly 3, and a power assembly 7. The housing 1 has a cavity, and the partition 11 is disposed in the cavity to divide the cavity into a low-pressure cavity 12 and a high-pressure cavity 13. The partition 11 has a first shaft hole 111, and a first oil inlet 112 is provided at the bottom of the partition 11. The motor 2 is disposed in the low-pressure cavity 12, and the pump assembly 3 is disposed in the high-pressure cavity 13. The pump assembly 3 includes a cylinder structure 31 and a crankshaft 32. The cylinder structure 31 is mounted on the eccentric portion 321 of the crankshaft 32. The crankshaft 32 is adapted to pass through the first shaft hole 111 and be connected to the rotor of the motor 2 for drive. The pump assembly 3 forms an oil passage. One end of the oil passage is connected to the first oil inlet 112, and the other end is adapted to communicate with the low-pressure cavity 12 through the gap between the cylinder structure 31 and the crankshaft 32. The power assembly 7 is used to make the medium flow from the first oil inlet 112 toward the oil passage.

[0030] In other words, the separator 11 can be installed in the cavity and divide the cavity into two independent chambers. The chamber where the cylinder structure 31 is located has a higher air pressure. Therefore, for ease of description, these two chambers are referred to as the low-pressure chamber 12 and the high-pressure chamber 13, respectively.

[0031] Furthermore, when the motor 2 rotates, the motor 2 can drive the crankshaft 32 to rotate. The crankshaft 32 may include a first shaft segment and a second shaft segment. The axis of the first shaft segment and the axis of the second shaft segment are parallel, and the axis of the first shaft segment and the axis of the second shaft segment are spaced apart in the radial direction of the crankshaft 32. The motor 2 can be connected to the first shaft segment for transmission. The second shaft segment includes an eccentric part 321, and the cylinder structure 31 is installed on the eccentric part 321. Thus, when the motor 2 drives the crankshaft 32 to rotate, the crankshaft 32 can drive the piston of the cylinder structure 31 to move, thereby making the cylinder structure 31 operate.

[0032] For example, the motor 2 may include a motor rotor, and a first shaft segment may be inserted through the motor rotor. The first shaft segment may be interference-fitted with the motor rotor, or the first shaft segment may be fixedly connected to the motor rotor through a fixed structure, so that the first shaft segment is driven to rotate when the motor rotor rotates, and the rotation of the first shaft segment causes the entire crankshaft 32 to rotate.

[0033] Furthermore, a first oil inlet 112 can be provided at the bottom of the separator 11, thereby forming an oil groove on the side of the separator 11 near the low-pressure chamber 12. The oil groove can store lubricating oil, that is, the medium in this application can be lubricating oil. Of course, it can also be other liquids with lubricating properties. This application does not limit this, and for ease of description, lubricating oil is used as an example in the following examples. When the cylinder structure 31 is running, the lubricating oil in the oil groove can be drawn into the oil passage through the first oil inlet 112 by the power component 7. The lubricating oil in the oil passage can transport the oil to the components of the cylinder structure 31 to achieve lubrication between the components, which can help the cylinder structure 31 operate effectively.

[0034] Furthermore, the lubricating oil in the oil passage can continue to flow along the oil passage and then re-enter the low-pressure chamber 12. The lubricating oil entering the low-pressure chamber 12 can be better collected at the bottom of the low-pressure chamber 12. The lubricating oil in the low-pressure chamber 12 can be collected back into the oil sump and then circulate to lubricate the components of the cylinder structure 31.

[0035] In addition, it is also understandable that even if an oil trough is not provided in the low-pressure chamber 12, the lubricating oil that re-enters the low-pressure chamber 12 can be better collected at the bottom of the low-pressure chamber 12, so that when the power assembly 7 is running, the lubricating oil at the bottom of the low-pressure chamber 12 is drawn into the oil passage through the first oil inlet 112.

[0036] Therefore, according to the embodiment of the present invention, the rotary compressor 100, by constructing an oil passage in the cylinder structure 31 and providing a first oil inlet 112 at the bottom of the separator 11, allows lubricating oil to enter the oil passage from the low-pressure chamber 12. The oil passage can deliver the lubricating oil to the various components of the cylinder structure 31 for lubrication, and then collect it back into the low-pressure chamber 12 and collect it at the bottom of the low-pressure chamber 12, thereby realizing the recycling of lubricating oil. This can better avoid the increase in frictional resistance of moving parts caused by lubricating oil loss, thereby better reducing wear between moving parts and improving the service life of the rotary compressor 100.

[0037] Furthermore, by designing an oil passage, this invention enables the recycling of lubricating oil, which reduces the amount of lubricating oil discharged with the gas, effectively ensuring the amount of oil stored in the rotary compressor 100 and reducing the amount of oil carried by the rotary compressor 100.

[0038] In some embodiments of the present invention, such as Figure 2 and Figure 4 As shown, the oil passage includes a first passage 41 and a second passage. The first passage 41 is disposed on the crankshaft 32 and extends along the axial direction of the crankshaft 32. The crankshaft 32 is provided with a plurality of oil passage holes 322 communicating with the first passage 41. The second passage is disposed between the crankshaft 32 and the cylinder structure 31.

[0039] In other words, after the lubricating oil passes through the first oil inlet 112, it can enter the first channel 41 inside the crankshaft 32. The first channel 41 can make good use of the axial space of the crankshaft 32, which is beneficial to the lubrication between the crankshaft 32 and the parts in contact with it. Specifically, the cylinder 313 can be provided with multiple oil passage holes 322. The lubricating oil in the first channel 41 can enter the parts in contact with the crankshaft 32 through the oil passage holes 322. The lubricating oil can form an oil film, which is beneficial to the lubrication between the crankshaft 32 and the parts, can improve the structural sealing, and can improve the volumetric efficiency.

[0040] Furthermore, the lubricating oil in the first channel 41 can enter the second channel. By setting the second channel between the crankshaft 32 and the cylinder structure 31, not only can the lubricating oil between the crankshaft 32 and the cylinder structure 31 be better, but the lubricating oil can also be transported better along the axial direction of the crankshaft 32, which helps to simplify the flow path of the lubricating oil.

[0041] In some embodiments of the present invention, such as Figures 2-4As shown, the cylinder structure 31 includes a first cover 311, a second cover 312, and a cylinder 313. Along the axial direction of the crankshaft 32, the first cover 311 and the second cover 312 are located on both sides of the cylinder 313. The first cover 311 is connected to the separator 11. The first cover 311 is provided with a second shaft hole 3111, and the second cover 312 is provided with a third shaft hole 3121. The crankshaft 32 is adapted to pass through the second shaft hole 3111 and the third shaft hole 3121. The inner wall of the second shaft hole 3111 is provided with a first groove 3112 extending axially. The second channel includes the first groove 3112.

[0042] In other words, during the assembly of the cylinder structure 31, the cylinder 313 can be assembled between the first cover 311 and the second cover 312. When the lubricating oil enters the first channel 41 of the crankshaft 32, the lubricating oil in the first channel 41 can flow out through the oil passage 322. After the lubricating oil flows out from the oil passage 322 opposite to the first cover 311, the lubricating oil can enter the first groove 3112 in a better way. The opening of the first groove 3112 faces the crankshaft 32. Therefore, a second channel can be constructed between the first groove 3112 and the outer peripheral wall of the crankshaft 32. The lubricating oil can be better collected in the first groove 3112 and then flow into the low-pressure chamber 12 along the second channel constructed by the first groove 3112.

[0043] For example, the crankshaft 32 may be clearance-fitted with the second shaft hole 3111 and the third shaft hole 3121.

[0044] For example, the first cover 311 may be provided with a through hole, one end of which communicates with the second shaft hole 3111, and the other end extends radially and communicates with the low-pressure chamber 12. That is, the second channel may include a through hole, and this application does not limit the arrangement of the second channel.

[0045] In some embodiments of the present invention, such as Figure 2 and Figure 3 As shown, in the direction from the high-pressure chamber 13 to the low-pressure chamber 12, the first groove 3112 extends downward.

[0046] In other words, when the lubricating oil enters the second shaft hole 3111 from the first channel 41 through the oil hole 322, the lubricating oil can be evenly distributed on the outer surface of the crankshaft 32 under the rotation of the crankshaft 32. The second shaft hole 3111 has a first groove 3112, so the lubricating oil can be better collected in the first groove 3112. By making the first groove 3112 extend downward, it is beneficial for the lubricating oil to flow along the first groove 3112 toward the low-pressure chamber 12.

[0047] In some embodiments of the present invention, such as Figure 2 and Figure 4As shown, the oil passage 322 includes a first oil passage opposite to the first cover 311, a second oil passage opposite to the cylinder 313, and a third oil passage opposite to the second cover 312.

[0048] In other words, the lubricating oil in the first channel 41 can enter between the crankshaft 32 and the first cover 311 through the first oil passage hole, thereby achieving better lubrication between the crankshaft 32 and the first cover 311. The lubricating oil in the first channel 41 can enter between the crankshaft 32 and the cylinder 313 through the second oil passage hole, thereby achieving better lubrication between the crankshaft 32 and the cylinder 313. The lubricating oil in the first channel 41 can enter between the crankshaft 32 and the second cover 312 through the third oil passage hole, thereby achieving better lubrication between the crankshaft 32 and the second cover 312.

[0049] For example, there can be two or more of the first oil passage hole, the second oil passage hole, and the third oil passage hole, which is beneficial to the uniform distribution of lubricating oil.

[0050] In some embodiments of the present invention, such as Figures 2-5 As shown, the third shaft hole 3121 is a blind hole facing the crankshaft 32. The end face of the crankshaft 32 is spaced apart from the bottom wall of the third shaft hole 3121. The end face of the crankshaft 32 forms a second oil inlet 323. The second cover 312 forms a radially extending third channel 3122. The third channel 3122 communicates with the third shaft hole 3121. The rotor compressor 100 also includes a first connecting pipe 51. The two ends of the first connecting pipe 51 are respectively connected to the first oil inlet 112 and the third channel 3122.

[0051] In other words, the lubricating oil at the bottom of the low-pressure chamber 12 can enter the first connecting pipe 51 through the first oil inlet 112, and then the lubricating oil in the first connecting pipe 51 can flow along the third channel 3122 and then enter the first channel 41 from the second oil inlet 323. That is, by utilizing the radial space of the second cover 312, a radially extending third channel 3122 is provided in the second cover 312, which not only facilitates the delivery of lubricating oil, but also helps to reduce pipeline components, thereby facilitating the integrated design of the cylinder structure 31.

[0052] like Figure 2 As shown, the third channel 3122 can extend radially downward to the wall of the second end cap and form an opening at the wall, thereby facilitating the processing of the third channel 3122 at the second end cap, and further, a plug 3123 can be provided to seal the opening at the wall.

[0053] In some embodiments of the present invention, such as Figure 2 and Figure 5As shown, the inner wall of the third shaft hole 3121 is formed with a second groove 3120 extending along the axial direction, and the second groove 3120 is connected to the third channel 3122.

[0054] like Figure 2 and Figure 5 As shown, the opening of the third channel 3122 facing the third shaft hole 3121 is opposite to the crankshaft 32. That is, the crankshaft 32 effectively blocks the outlet of the third channel 3122. By setting the second groove 3120 on the inner wall of the third shaft hole 3121, the lubricating oil in the third channel 3122 can enter the second groove 3120 better, and then flow along the second groove 3120 to the gap space between the end face of the crankshaft 32 and the bottom wall of the third shaft hole 3121. Then the lubricating oil in the gap space can enter the first channel 41 from the second oil inlet 323.

[0055] When lubricating oil is delivered to the second groove 3120, the outer peripheral surface of the crankshaft 32 can come into good contact with the lubricating oil in the second groove 3120, thus achieving good lubrication between the crankshaft 32 and the second cover 312.

[0056] For example, the second groove 3120 may be located at the lowest position of the third shaft hole 3121, thereby facilitating the delivery of lubricating oil.

[0057] In some embodiments of the present invention, such as Figure 6 As shown, the third shaft hole 3121 is a through hole that passes through the second cover 312 along the axial direction of the crankshaft 32. The rotor compressor 100 also includes an oil suction cover 6 and a second connecting pipe 52. The oil suction cover 6 covers the third shaft hole 3121, and the two ends of the second connecting pipe 52 are connected to the first oil inlet 112 and the oil suction cover 6, respectively.

[0058] In other words, the lubricating oil at the bottom of the low-pressure chamber 12 can enter the second connecting pipe 52 through the first oil inlet 112, and the lubricating oil in the second connecting pipe can enter the oil suction hood 6, and then enter the first channel 41 through the second oil inlet 323.

[0059] For example, the oil suction cover 6 is detachably installed on the second cover 312. The oil suction cover 6 can better seal the third shaft hole 3121. The oil suction cover 6 is easy to disassemble. Compared with constructing the third channel 3122 in the second cover 312, the processing difficulty of the second cover 312 can be reduced by setting the oil suction cover 6.

[0060] In some embodiments of the present invention, such as Figure 2 As shown, the power assembly 7 includes an oil guide plate, which has a spiral structure and is disposed in the first channel 41 to drive the flow of medium when the crankshaft 32 rotates.

[0061] In other words, when the motor 2 drives the crankshaft 32 to rotate, the crankshaft 32 can drive the oil guide plate to rotate. The spiral structure design of the oil guide plate causes the gas flow in the first channel 41 to generate negative pressure, which can better guide the oil towards the first channel 41. Thus, the axial space of the crankshaft 32 can be better utilized, and the integration of the pump body assembly 3 can be better improved.

[0062] Furthermore, this application does not impose any restrictions on the material of the oil guide plate.

[0063] Furthermore, for spiral structures, one can refer to spiral fan blades, etc. The design of the oil guide plate is essentially to guide the direction of gas flow and, like a fan blade, provide power for the gas flow.

[0064] In some embodiments of the present invention, such as Figure 2 As shown, the first cover 311 has a protrusion 113 on the side facing the separator 11. The protrusion 113 passes through the first shaft hole 111. The rotor compressor 100 also includes a seal 81, which is disposed between the protrusion 113 and the inner wall of the first shaft hole 111.

[0065] In other words, by providing a protrusion 113 to the first cover 311, the first cover 311 can better cooperate with the separator 11, and the axial space between the separator 11 and the first cover 311 can be better utilized, which is conducive to making the separator 11 and the first cover 311 more compact. Furthermore, as in the example above, a first groove 3112 is provided in the second shaft hole 3111 of the first cover 311, and the lubricating oil in the first groove 3112 can better enter the low-pressure chamber 12, which can reduce the contact between the lubricating oil and the separator 11.

[0066] For example, the protrusion 113 can pass through the first shaft hole 111, that is, the lubricating oil can avoid contacting the first shaft hole 111 during the circulation process.

[0067] Furthermore, the seal 81 can effectively seal the assembly gap between the protrusion 113 and the first shaft hole 111, and can effectively reduce the mutual interference between the low-pressure chamber 12 and the high-pressure chamber 13.

[0068] Other configurations and operations of the rotary compressor 100 according to embodiments of the present invention are known to those skilled in the art and will not be described in detail here.

[0069] For example, the rotary compressor 100 can be used in equipment such as air conditioners and automobiles, and this application does not impose any restrictions on it.

[0070] In the description of this specification, references to terms such as "some embodiments," "optionally," "furthermore," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A rotary compressor (100), characterized in that, include: A housing (1) having a cavity; A separator (11) is disposed in the cavity to divide the cavity into a low-pressure chamber (12) and a high-pressure chamber (13). The separator (11) has a first shaft hole (111) and a first oil inlet (112) is provided at the bottom of the separator (11). Motor (2), said motor (2) is disposed in the low-pressure chamber (12); Pump body assembly (3), the pump body assembly (3) is disposed in the high pressure chamber (13), the pump body assembly (3) includes a cylinder structure (31) and a crankshaft (32), the cylinder structure (31) is installed on the eccentric part (321) of the crankshaft (32), the crankshaft (32) is adapted to pass through the first shaft hole (111) and be connected to the rotor of the motor (2) for transmission, the pump body assembly (3) forms an oil passage, one end of the oil passage is connected to the first oil inlet (112), and the other end is adapted to communicate with the low pressure chamber (12) through the gap between the cylinder structure (31) and the crankshaft (32); A power assembly (7) is used to cause the medium to flow from the first oil inlet (112) toward the oil passage.

2. The rotary compressor (100) according to claim 1, characterized in that, The oil passage includes a first passage (41) and a second passage. The first passage (41) is disposed on the crankshaft (32) and extends along the axial direction of the crankshaft (32). The crankshaft (32) is provided with a plurality of oil passage holes (322) communicating with the first passage (41). The second passage is disposed between the crankshaft (32) and the cylinder structure (31).

3. The rotary compressor (100) according to claim 2, characterized in that, The cylinder structure (31) includes: a first cover (311), a second cover (312), and a cylinder (313). Along the axial direction of the crankshaft (32), the first cover (311) and the second cover (312) are located on both sides of the cylinder (313). The first cover (311) is connected to the separator (11). The first cover (311) is provided with a second shaft hole (3111), and the second cover (312) is provided with a third shaft hole (3121). The crankshaft (32) is adapted to pass through the second shaft hole (3111) and the third shaft hole (3121). The inner wall of the second shaft hole (3111) is provided with a first groove (3112) extending axially. The second channel includes the first groove (3112).

4. The rotary compressor (100) according to claim 3, characterized in that, In the direction from the high-pressure chamber (13) to the low-pressure chamber (12), the first groove (3112) extends downward.

5. The rotary compressor (100) according to claim 3, characterized in that, The oil passage (322) includes a first oil passage opposite to the first cover (311), a second oil passage opposite to the cylinder (313), and a third oil passage opposite to the second cover (312).

6. The rotary compressor (100) according to claim 3, characterized in that, The third shaft hole (3121) is a blind hole facing the crankshaft (32). The end face of the crankshaft (32) is spaced apart from the bottom wall of the third shaft hole (3121). The end face of the crankshaft (32) forms a second oil inlet (323). The second cover (312) forms a radially extending third channel (3122). The third channel (3122) communicates with the third shaft hole (3121). The rotor compressor (100) also includes a first connecting pipe (51). The two ends of the first connecting pipe (51) are respectively connected to the first oil inlet (112) and the third channel (3122).

7. The rotary compressor (100) according to claim 6, characterized in that, The inner wall of the third shaft hole (3121) is formed with a second groove (3120) extending axially, and the second groove (3120) communicates with the third channel (3122).

8. The rotary compressor (100) according to claim 3, characterized in that, The third shaft hole (3121) is a through hole that passes through the second cover (312) along the axial direction of the crankshaft (32). The rotor compressor (100) also includes an oil suction cover (6) and a second connecting pipe (52). The oil suction cover (6) is installed on the third shaft hole (3121), and the two ends of the second connecting pipe (52) are respectively connected to the first oil inlet (112) and the oil suction cover (6).

9. The rotary compressor (100) according to claim 2, characterized in that, The power assembly (7) includes an oil guide plate, which has a spiral structure and is disposed in the first channel (41) to drive the flow of the medium when the crankshaft (32) rotates.

10. The rotary compressor (100) according to claim 3, characterized in that, The first cover (311) has a protrusion (113) on the side facing the separator (11), the protrusion (113) passing through the first shaft hole (111), and the rotor compressor (100) also includes a seal (81), the seal (81) being disposed between the protrusion (113) and the inner wall of the first shaft hole (111).

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