Scroll compressor

Abstract

This invention provides a scroll compressor, comprising: a compressor housing having a main mounting cavity and an oil distribution cavity inside; a scroll compression structure having an outlet located within the main mounting cavity; an oil distribution guide structure disposed within the main mounting cavity; the oil distribution guide structure having an oil distribution guide cavity inside, the inlet of which communicates with the outlet; a connecting guide end of the oil distribution guide structure away from the scroll compression structure, the connecting guide end being inserted into the inner wall of the main mounting cavity, the connecting guide end having a connecting cavity inside, one end of which communicates with the main mounting cavity, and the other end of which communicates with the oil distribution cavity; the oil distribution guide cavity communicating with the oil distribution cavity through the main mounting cavity and the connecting cavity. This invention effectively separates the refrigerant and lubricating oil discharged from the outlet of the scroll compression structure, thereby effectively reducing the oil carryover rate and oil discharge volume during scroll compressor discharge, effectively avoiding lubricating oil waste while improving the reliability of the scroll compressor during long-term high-speed operation.

Description

Technical Field

[0001] This invention relates to the field of compressor equipment technology, and more specifically, to a scroll compressor. Background Technology

[0002] Scroll compressors are high-efficiency, low-noise, and stable-operating positive displacement compressors. As the third generation of automotive compressors, they are widely used in automotive air conditioning systems. In recent years, with the development of new energy vehicles, the requirements for noise, vibration, and durability of automotive air conditioning scroll compressors have further increased.

[0003] During operation, scroll compressors require lubricating oil to lubricate the friction pairs within the compressor, thereby reducing noise generated during operation. In existing technology, an oil separator and an oil reservoir are installed within the scroll compressor. The oil separator separates the refrigerant and lubricating oil mixture discharged from the compressor's compression chamber. The oil reservoir is located below the oil separator and stores the lubricating oil separated and discharged by the oil separator. Simultaneously, a throttling oil return structure is installed between the oil reservoir and the scroll compressor's oil return channel. An oil return hole at the bottom of the oil reservoir connects to the inlet of the throttling oil return structure, allowing the lubricating oil in the oil reservoir to ultimately return to the scroll compressor's oil return channel via the throttling oil return structure, lubricating the friction pairs within the scroll compressor and forming a circulating oil circuit.

[0004] Currently, compressors used in new energy vehicles generally employ horizontal compressors (i.e., scroll compressors) with a low-pressure chamber structure. These compressors have a high oil discharge rate, and compared to vertical high-pressure chamber structures, the exhaust chamber of a horizontal compressor occupies less space. However, during exhaust, the refrigerant and refrigeration oil carried by the horizontal compressor cannot be effectively separated and deposited in the exhaust chamber before being carried out of the compressor. To address this issue, existing technologies typically install a cyclone oil-gas separator at the exhaust outlet to effectively separate some lubricating oil during exhaust. However, as the compressor's operating frequency increases, under high-speed and high-flow exhaust conditions, the lubricating oil separated by the cyclone oil-gas separator is agitated by the high-speed gas and carried out of the compressor. The proportion of lubricating oil carried away is greater than the proportion separated by the cyclone oil-gas separator, thus reducing the separation of lubricating oil from gas, the deposition of lubricating oil, and the compressor's oil storage effect.

[0005] When the lubricating oil inside the compressor is discharged from the compressor system or when the lubricating oil return circulation is poor, the compressor is prone to malfunction due to insufficient lubricating oil. In actual tests, the lower part of the compressor is often lighter than the upper part, resulting in less and less oil remaining in the compressor over a long period of operation, which in turn adversely affects the reliability of long-term operation.

[0006] In summary, existing scroll compressors have problems such as high oil carryover rate during discharge and large oil discharge volume at high speeds. Furthermore, existing scroll compressors have weak oil storage capacity, poor oil return, and are prone to adverse problems such as poor bearing lubrication during long-term operation. Summary of the Invention

[0007] This invention provides a scroll compressor to solve the problems of high oil carryover rate and large oil discharge volume in existing scroll compressors.

[0008] To address the aforementioned problems, this invention provides a scroll compressor, comprising: a compressor housing having a main mounting cavity and an oil distribution cavity inside; a scroll compression structure having an outlet located within the main mounting cavity; an oil distribution and air guiding structure disposed within the main mounting cavity; the oil distribution and air guiding structure being used to separate refrigerant from lubricating oil; the oil distribution and air guiding structure having an oil distribution and air guiding cavity inside, with its inlet connected to the outlet; the end of the oil distribution and air guiding structure furthest from the scroll compression structure being a connecting air guiding end, the connecting air guiding end being inserted into the inner wall of the main mounting cavity, the connecting air guiding end having a connecting cavity inside, one end of the connecting cavity being connected to the main mounting cavity, and the other end of the connecting cavity being connected to the oil distribution cavity; the oil distribution and air guiding cavity being connected to the oil distribution cavity through the main mounting cavity and the connecting cavity.

[0009] Furthermore, the compressor housing also has a positioning through hole inside, which connects the oil distribution chamber and the main mounting chamber; the connecting air guide end extends into the positioning through hole and is limited and matched with the inner wall of the positioning through hole.

[0010] Furthermore, the oil-separation and air-guiding structure includes a multi-stage oil separator and an air guide, with the air guide fixing the multi-stage oil separator on the scroll compression structure; the connecting air guide end is located on the air guide.

[0011] Furthermore, the end of the air guide far from the connecting air guide end is the connecting insertion end; the interior of the connecting insertion end has an air inlet chamber, which is connected to the air outlet; the multi-stage oil separator has an oil-gas separation chamber, and the connecting insertion end is inserted into the oil-gas separation chamber; the oil-gas separation chamber is connected to the air inlet chamber and the main installation chamber respectively; the air inlet chamber and the oil-gas separation chamber together form the oil-gas guiding chamber; wherein, the mixed material blown out of the air outlet passes through the air inlet chamber and the oil-gas separation chamber in sequence and enters the main installation chamber.

[0012] Furthermore, the connecting insertion end passes through the oil-gas separation chamber and is threadedly connected to the vortex compression structure; the outer periphery of the air guide has a positioning shoulder, one end of the multi-stage oil separator abuts against the vortex compression structure, and the other end of the multi-stage oil separator abuts against the positioning shoulder.

[0013] Furthermore, the oil-gas separation chamber includes a first oil-gas separation chamber, a second oil-gas separation chamber, and a third oil-gas separation chamber connected in sequence. The first oil-gas separation chamber is connected to the air intake chamber and is connected to the main installation chamber through a first oil passage; the second oil-gas separation chamber is connected to the main installation chamber through a second oil passage; and the third oil-gas separation chamber is connected to the main installation chamber.

[0014] Furthermore, the inner wall of the oil-gas separation chamber has an insertion hole, through which the connecting insertion end passes; the first oil-gas separation chamber is connected to the second oil-gas separation chamber through the insertion hole, and the second oil-gas separation chamber is connected to the third oil-gas separation chamber through a circumferential air passage, which is arranged around the circumference of the multi-stage oil separator.

[0015] Furthermore, the multi-stage oil separator includes a cylindrical body and an end cap portion disposed on the cylindrical body, with a first oil passage penetrating the cylindrical body; a second oil passage sequentially penetrating the cylindrical body and the end cap portion; or, there is a gap between the cylindrical body and the end cap portion to form the second oil passage; the cross-sectional area of ​​the second oil passage is not greater than a circular area with a diameter of 2 mm.

[0016] Furthermore, the internal part of the connecting insertion end also has a first air passage, and the air intake chamber is connected to the oil-gas separation chamber through the first air passage; the internal part of the connecting air guide end also has a second air passage, and the connecting chamber is connected to the main installation chamber through the second air passage; wherein, the cross-sectional area of ​​the first air passage, the air intake chamber, the second air passage and the connecting chamber are all larger than the cross-sectional area of ​​the air outlet.

[0017] Furthermore, the scroll compressor also includes a plug for sealing the positioning through hole. The plug is a frustum-shaped annular structure with a through hole inside. The connecting air guide end of the air guide passes through the through hole and abuts against the inner wall of the through hole. The annular conical surface on the outer periphery of the frustum-shaped annular structure fits against the inner wall of the positioning through hole.

[0018] Furthermore, the circumferential section connecting the air guide end has a stepped shoulder, which abuts against the inner wall of the through hole; the stepped shoulder abuts against one end of the sleeve to axially limit the sleeve; the sleeve is made of elastic material and is interference-fitted with the inner wall of the positioning through hole.

[0019] Furthermore, the scroll compressor also includes a high-low pressure separator, which is located at the end of the scroll compressor structure near the outlet and within the main mounting cavity. The oil distribution and air guiding structure and the high-low pressure separator divide the main mounting cavity into a high-pressure zone, a first oil accumulation zone, and a first oil collection zone from top to bottom, wherein the high-pressure zone, the first oil accumulation zone, and the first oil collection zone are connected in sequence. The first oil accumulation zone is located between the oil distribution and air guiding structure and the high-low pressure separator. The first oil collection zone and the first oil accumulation zone are used to collect lubricating oil, and the high-pressure zone is connected to the oil distribution and air guiding cavity and the oil distribution cavity, respectively.

[0020] Furthermore, the high-low pressure separator has an oil collection channel, which connects the first oil accumulation area and the first oil collection area; wherein, under the action of gravity, lubricating oil flows from the first oil accumulation area into the first oil collection area through the oil collection channel.

[0021] Furthermore, the high-low pressure separator includes a sealing body and a separator. The sealing body is connected to one end of the vortex compression structure near the outlet and is sealed to the inner wall of the main mounting cavity. One axial end of the separator is connected to the sealing body, and the other axial end of the separator abuts against the inner wall of the main mounting cavity. An oil collection channel runs through the separator. A first oil accumulation area is formed between the separator and the oil distribution and air guiding structure, and a first oil collection area is formed below the separator.

[0022] Furthermore, the outer periphery of the sealing body has a sealing ring groove, and the scroll compressor also includes a sealing ring, which is disposed in the sealing ring groove and is matched with the inner wall of the sealing ring groove; the sealing body and the inner wall of the main mounting cavity are sealed by the sealing ring.

[0023] Optionally, the sealing body is a cylindrical structure, the partition is located inside the cylindrical structure, the lower part of the first oil collecting area is the inner wall of the cylindrical structure, the inner wall of the cylindrical structure has a through fourth oil passage, the fourth oil passage is connected to the lower part of the first oil collecting area; the outer periphery of the cylindrical structure has a spiral oil passage, the spiral oil passage is connected to the fourth oil passage; the compressor housing has a return oil passage, the return oil passage is connected to the spiral oil passage; wherein, the lubricating oil in the first oil collecting area enters the interior of the scroll compressor structure in sequence through the fourth oil passage, the spiral oil passage, and the return oil passage.

[0024] Furthermore, the scroll compressor also includes an oil separator disposed in the oil separation chamber, which is used to separate the refrigerant from the lubricating oil; a second oil collection area is formed at the bottom of the oil separation chamber, which is used to collect the lubricating oil separated by the oil separator; the second oil collection area is connected to the first oil collection area.

[0025] Optionally, the sealing body is a disc structure, the partition is located in the middle of the disc structure, the lower part of the first oil collection area is the inner wall of the compressor housing, the compressor housing has an oil return channel, the oil return channel is connected to the lower part of the first oil collection area; wherein, the lubricating oil in the first oil collection area enters the interior of the scroll compressor structure through the oil return channel.

[0026] Furthermore, the oil-gas separation and air-guiding structure includes a multi-stage oil separator and an air guide. The multi-stage oil separator has an oil-gas separation chamber, and the air guide has an air inlet chamber, which is connected to the air outlet. The oil-gas separation chamber is connected to both the air inlet chamber and the main mounting chamber. The air inlet chamber and the oil-gas separation chamber together form the oil-gas separation and air-guiding chamber. The oil-gas separation chamber includes a first oil-gas separation chamber, a second oil-gas separation chamber, and a third oil-gas separation chamber connected in sequence. The first oil-gas separation chamber is connected to the air inlet chamber and is connected to the first oil accumulation area through a first oil passage. The second oil-gas separation chamber is connected to the first oil accumulation area through a second oil passage. The third oil-gas separation chamber is connected to the high-pressure area.

[0027] Furthermore, a second oil accumulation area for containing lubricating oil is formed at the bottom of the first oil-gas separation chamber, and the second oil accumulation area is connected to the first oil accumulation area through the first oil passage; a third oil accumulation area for containing lubricating oil is formed at the bottom of the second oil-gas separation chamber, and the third oil accumulation area is connected to the first oil accumulation area through the second oil passage.

[0028] Furthermore, the compressor housing has an oil return channel, which connects the first oil collection area and the interior of the scroll compressor structure.

[0029] Furthermore, the scroll compressor also includes an oil separator disposed in the oil separator chamber, which is used to separate the refrigerant from the lubricating oil; the compressor housing has an oil return channel, which is used to connect the oil separator chamber, the main mounting chamber and the interior of the scroll compressor structure; the lubricating oil separated from the oil separator chamber and the oil separator is concentrated at the bottom of the main mounting chamber and / or the oil separator chamber, and enters the interior of the scroll compressor structure through the oil return channel.

[0030] Furthermore, a second oil collection area is formed at the bottom of the oil separation chamber, which is used to collect the lubricating oil separated by the oil separator; the second oil collection area is connected to the return oil channel.

[0031] Furthermore, the scroll compressor also includes: a bracket, which is mounted on the compressor housing and is sealed to the compressor housing; a bearing, which is mounted inside the bracket and is limited to the inner wall of the bracket; wherein, there is a back pressure chamber between the bracket and the scroll compression structure, and the bracket is provided with a bracket oil passage, which is connected to the oil return channel and the back pressure chamber respectively; a drive unit, the shaft of which passes through the bearing; the shaft is connected to the scroll compression structure, and the drive unit is used to drive the scroll compression structure to compress the refrigerant entering from the air inlet.

[0032] Furthermore, the support oil circuit includes an oil inlet circuit, multiple radial lubrication circuits, a surrounding circuit, and an oil outlet circuit. The two ends of the oil inlet circuit are respectively connected to the back pressure chamber and the return oil channel; the radial lubrication circuits are respectively connected to the back pressure chamber and the surrounding circuit; the multiple radial lubrication circuits are arranged at intervals along the circumference of the bearing, and the radial lubrication circuits are used to guide the lubricating oil into the bearing; the surrounding circuits are arranged around the circumference of the bearing and are connected to the oil outlet circuit; the oil outlet circuit is connected to the interior of the drive unit to deliver the lubricating oil into the drive unit.

[0033] Furthermore, the scroll compressor also includes a throttling pressure reducer, which is installed in the oil outlet circuit to regulate the flow and pressure in the oil outlet circuit.

[0034] According to the technical solution of this invention, a scroll compressor is provided, comprising: a compressor housing having a main mounting cavity and an oil distribution cavity inside; a scroll compression structure having an outlet located within the main mounting cavity; an oil distribution and air guiding structure disposed within the main mounting cavity; the oil distribution and air guiding structure being used to separate refrigerant and lubricating oil; the oil distribution and air guiding structure having an oil distribution and air guiding cavity inside, with its inlet connected to the outlet; the end of the oil distribution and air guiding structure away from the scroll compression structure being a connecting air guiding end, the connecting air guiding end being inserted into the inner wall of the main mounting cavity, the connecting air guiding end having a connecting cavity inside, one end of the connecting cavity being connected to the main mounting cavity, and the other end of the connecting cavity being connected to the oil distribution cavity; the oil distribution and air guiding cavity being connected to the oil distribution cavity through the main mounting cavity and the connecting cavity. This invention effectively separates the refrigerant and lubricating oil discharged from the outlet of the scroll compressor by setting up an oil-separating and air-guiding structure. By setting the oil-separating and air-guiding chamber to connect sequentially through the main mounting chamber and the connecting chamber to the oil-separating chamber, multi-chamber staged oil separation is achieved, thereby effectively reducing the oil carryover rate and oil discharge volume during the discharge of the scroll compressor. This effectively avoids lubricating oil waste and improves the reliability of the scroll compressor during long-term high-speed operation. By setting the oil-separating and air-guiding chambers and the connecting chamber to the main mounting chamber respectively, the lubricating oil separated in the oil-separating and air-guiding chambers can be effectively stored and circulated, thereby improving the oil storage capacity of the scroll compressor. Furthermore, it also provides the necessary structural support for the subsequent oil return of the scroll compressor, enabling the scroll compressor structure to be lubricated efficiently and stably. Attached Figure Description

[0035] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an undue limitation of the invention. In the drawings:

[0036] Figure 1 A schematic diagram of the internal structure of the scroll compressor provided in Embodiment 1 of the present invention is shown;

[0037] Figure 2This shows a full sectional view of the oil-separating and gas-guiding structure provided in Embodiment 2 of the present invention at a certain angle;

[0038] Figure 3 This shows a full sectional view of the multi-stage oil separator provided in Embodiment 2 of the present invention from another angle;

[0039] Figure 4 A partial structural schematic diagram of the end cap portion provided in Embodiment 2 of the present invention is shown;

[0040] Figure 5 A full sectional view of the oil-separating and gas-guiding structure provided in Embodiment 3 of the present invention is shown;

[0041] Figure 6 A schematic diagram of the internal structure of the air guide provided in an embodiment of the present invention is shown;

[0042] Figure 7 A schematic diagram of the internal structure of the sleeve provided in an embodiment of the present invention is shown;

[0043] Figure 8 It shows Figure 1 A magnified view of a portion of point A in the middle;

[0044] Figure 9 A partially enlarged view of the scroll compressor provided in Embodiment 4 of the present invention is shown;

[0045] Figure 10 A schematic diagram of the external structure of the sealing body provided in Embodiment 4 of the present invention is shown;

[0046] Figure 11 A schematic diagram of the internal structure of the bracket provided in the embodiments of the present invention is shown;

[0047] Figure 12 A top view of the bracket provided in an embodiment of the present invention is shown.

[0048] The above figures include the following reference numerals:

[0049] 10. Compressor housing; 11. Main mounting cavity; 111. High-pressure zone; 112. First oil accumulation zone; 113. First oil collection zone; 12. Oil distribution chamber; 121. Second oil collection zone; 13. Positioning through hole; 14. Oil return channel;

[0050] 20. Scroll compression structure; 21. Air outlet;

[0051] 30. Oil-gas separator structure; 31. Oil-gas separator chamber; 32. Connecting chamber; 33. Multi-stage oil separator; 331. Oil-gas separation chamber; 3311. First oil-gas separation chamber; 33111. Second oil accumulation area; 3312. Second oil-gas separation chamber; 33121. Third oil accumulation area; 3313. Third oil-gas separation chamber; 3314. First oil passage; 3315. Second oil passage; 3316. Insertion hole; 3317. Cylinder body; 3318. End cap; 34. Air guide; 341. Positioning shoulder; 342. Stepped shoulder; 35. Inlet chamber; 36. First air passage; 37. Second air passage; 38. Circumferential air passage;

[0052] 40. Sleeve plug; 41. Through hole; 42. Annular conical surface;

[0053] 50. High and low pressure separator; 51. Oil collection channel; 52. Sealing body; 521. Sealing ring groove; 522. Fourth oil passage; 523. Spiral oil passage; 53. Separator;

[0054] 60. Sealing ring;

[0055] 70. Oil separator;

[0056] 80. Bracket; 81. Back pressure chamber; 82. Bracket oil passage; 821. Oil inlet passage; 822. Radial lubrication passage; 823. Circumferential oil passage; 824. Oil outlet passage;

[0057] 90. Bearings;

[0058] 100. Drive unit; 101. Shaft;

[0059] 110. Throttling and voltage reduction device. Detailed Implementation

[0060] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present invention or its application or use. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0061] like Figures 1 to 12 As shown, an embodiment of the present invention provides a scroll compressor, comprising:

[0062] The compressor housing 10 has a main mounting cavity 11 and an oil distribution cavity 12 inside;

[0063] The vortex compression structure 20 has an outlet 21 located within the main mounting cavity 11.

[0064] The oil-separating and air-guiding structure 30 is disposed within the main mounting cavity 11. The oil-separating and air-guiding structure 30 is used to separate the refrigerant from the lubricating oil. The oil-separating and air-guiding structure 30 has an oil-separating and air-guiding chamber 31 inside, and the inlet and outlet of the oil-separating and air-guiding chamber 31 are connected. The end of the oil-separating and air-guiding structure 30 away from the scroll compression structure 20 is a connecting air-guiding end, which is inserted into the inner wall of the main mounting cavity 11. The connecting air-guiding end has a connecting cavity 32 inside, one end of which is connected to the main mounting cavity 11, and the other end of which is connected to the oil-separating cavity 12. The oil-separating and air-guiding chamber 31 is connected to the oil-separating cavity 12 through the main mounting cavity 11 and the connecting cavity 32.

[0065] This invention effectively separates the refrigerant and lubricating oil discharged from the outlet 21 of the scroll compressor structure 20 by setting an oil-separating and air-guiding structure 30. By setting the oil-separating and air-guiding chamber 31 to connect to the oil-separating chamber 12 through the main mounting chamber 11 and the connecting chamber 32 in sequence, it realizes multi-chamber graded oil separation, thereby effectively reducing the oil carryover rate and oil discharge volume during the exhaust of the scroll compressor. While effectively avoiding lubricating oil waste, it improves the reliability of the scroll compressor during long-term high-speed operation. By setting the oil-separating and air-guiding chamber 31 and the connecting chamber 32 to the main mounting chamber 11 respectively, the lubricating oil separated in the oil-separating and air-guiding chamber 31 and the connecting chamber 32 can be effectively stored and circulated, thereby improving the oil storage capacity of the scroll compressor. In addition, it also provides the necessary structural support for the subsequent oil return of the scroll compressor, so that the scroll compressor structure 20 can be lubricated efficiently and stably.

[0066] It should be noted that the vortex compression structure 20 of the present invention is used to compress the refrigerant entering from the air inlet and blow out a mixture containing refrigerant and lubricating oil from the air outlet 21; wherein, the mixture blown out from the air outlet 21 passes through the oil separator 31 and the oil separator 70 in sequence, and the separated lubricating oil can be returned to lubricate the vortex compression structure 20.

[0067] like Figure 1 , Figure 8 and Figure 9 As shown, the compressor housing 10 also has a positioning through hole 13 inside, which connects the oil distribution chamber 12 and the main mounting chamber 11; the connecting air guide end extends into the positioning through hole 13 and is limited and matched with the inner wall of the positioning through hole 13. By setting the positioning through hole 13, the oil distribution chamber 12 and the main mounting chamber 11 are effectively connected, and the oil distribution air guide structure 30 is reliably fixed.

[0068] like Figure 1 , Figure 2 , Figure 5 , Figure 8 and Figure 9 As shown, the oil-separating and air-guiding structure 30 includes a multi-stage oil separator 33 and an air guide 34. The air guide 34 fixes the multi-stage oil separator 33 onto the scroll compression structure 20; the connecting air guide end is located on the air guide 34. This arrangement makes the oil-separating and air-guiding structure 30 easy to install and process, while also ensuring the operational reliability of the oil-separating and air-guiding structure 30.

[0069] like Figure 1 , Figure 2 , Figure 5 , Figure 8 and Figure 9 As shown, the end of the air guide 34 furthest from the connecting air guide end is the connecting insertion end; the interior of the connecting insertion end has an air inlet chamber 35, which is connected to the air outlet 21; the multi-stage oil separator 33 has an oil-gas separation chamber 331, and the connecting insertion end is inserted into the oil-gas separation chamber 331; the oil-gas separation chamber 331 is connected to both the air inlet chamber 35 and the main mounting chamber 11; the air inlet chamber 35 and the oil-gas separation chamber 331 together form the oil-separating air guide chamber 31; wherein, the mixed material blown out of the air outlet 21 passes through the air inlet chamber 35 and the oil-gas separation chamber 331 in sequence and enters the main mounting chamber 11. By setting the air inlet chamber 35 and the oil-gas separation chamber 331 together to form the oil-separating air guide chamber 31, the refrigerant and lubricating oil are separated in multiple stages within the oil-separating air guide chamber 31, and the separated lubricating oil can be effectively deposited and collected from the inner walls of the air inlet chamber 35 and the oil-gas separation chamber 331.

[0070] like Figure 1 , Figure 2 , Figure 5 , Figure 8 and Figure 9 As shown, the connecting insertion end passes through the oil-gas separation chamber 331 and is threadedly connected to the vortex compression structure 20; the outer periphery of the air guide 34 has a positioning shoulder 341, one end of the multi-stage oil separator 33 abuts against the vortex compression structure 20, and the other end of the multi-stage oil separator 33 abuts against the positioning shoulder 341. This arrangement ensures reliable fixation of the multi-stage oil separator 33 and the air guide 34, thereby guaranteeing the operational reliability of the oil-gas separation and air guiding structure 30.

[0071] like Figure 2 , Figure 3 and Figure 5As shown, the oil-gas separation chamber 331 includes a first oil-gas separation chamber 3311, a second oil-gas separation chamber 3312, and a third oil-gas separation chamber 3313 connected in sequence. The first oil-gas separation chamber 3311 is connected to the air intake chamber 35 and to the main mounting chamber 11 through the first oil passage 3314; the second oil-gas separation chamber 3312 is connected to the main mounting chamber 11 through the second oil passage 3315; and the third oil-gas separation chamber 3313 is connected to the main mounting chamber 11. By setting the oil-gas separation chamber 331 to include the first oil-gas separation chamber 3311, the second oil-gas separation chamber 3312, and the third oil-gas separation chamber 3313 connected in sequence, the refrigerant and lubricating oil can be separated in multiple stages within the oil-gas separation chamber 331, and the separated lubricating oil can be effectively deposited and collected from the inner wall of the oil-gas separation chamber 331.

[0072] like Figure 2 and Figure 5 As shown, the inner wall of the oil-gas separation chamber 331 has an insertion hole 3316, through which the connecting insertion end passes. The first oil-gas separation chamber 3311 is connected to the second oil-gas separation chamber 3312 through the insertion hole 3316. The second oil-gas separation chamber 3312 is connected to the third oil-gas separation chamber 3313 through a circumferential air passage 38, which is arranged around the circumference of the multi-stage oil separator 33. By setting the circumferential air passage 38, centrifugal force is effectively utilized during the process of the mixture entering the third oil-gas separation chamber 3313 (circle 5) from the second oil-gas separation chamber 3312 (circle 3). Under the action of centrifugal force, the lubricating oil and the refrigerant will achieve spiral separation within the circumferential air passage 38, thereby improving the oil-gas separation effect.

[0073] It should be noted that: such as Figure 2 and Figure 3 As shown in the figure, the arrows and circled numbers indicate the movement sequence of the mixture, that is, the mixture of refrigerant and lubricating oil passes through the intake chamber 35 (circle 1), the first oil-gas separation chamber 3311 (circle 2), the second oil-gas separation chamber 3312 (circle 3), the circumferential air passage 38 (circle 4), and the third oil-gas separation chamber 3313 (circle 5) in sequence for oil-gas separation.

[0074] like Figure 2 and Figure 5 As shown, the multi-stage oil separator 33 includes a cylindrical body 3317 and an end cap 3318 disposed on the cylindrical body 3317. A first oil passage 3314 penetrates the cylindrical body 3317; a second oil passage 3315 sequentially penetrates the cylindrical body 3317 and the end cap 3318 (e.g., ...). Figure 5 As shown, this is the technical solution of Embodiment 3; or, there is a gap between the cylinder portion 3317 and the end cap portion 3318 to form a second oil passage 3315 (as shown). Figure 2As shown in the figure, this is the technical solution of Embodiment 2; the cross-sectional area of ​​the second oil passage 3315 is not greater than a circular area with a diameter of 2mm. By setting the cross-sectional area of ​​the second oil passage 3315 to be no greater than a circular area with a diameter of 2mm, it is not only convenient to precisely process the second oil passage 3315, but also ensures that the fluid velocity and fluid pressure in the second oil passage 3315 meet the actual use requirements by controlling the inner diameter.

[0075] like Figure 2 and Figure 5 As shown, the connecting insertion end also has a first air passage 36 inside, and the air inlet chamber 35 is connected to the oil-gas separation chamber 331 through the first air passage 36; the connecting air guide end also has a second air passage 37 inside, and the connecting chamber 32 is connected to the main installation chamber 11 through the second air passage 37; wherein, the cross-sectional areas of the first air passage 36, the air inlet chamber 35, the second air passage 37 and the connecting chamber 32 are all larger than the cross-sectional area of ​​the air outlet 21. By setting the cross-sectional areas of the first air passage 36, the air inlet chamber 35, the second air passage 37 and the connecting chamber 32 to be larger than the cross-sectional area of ​​the air outlet 21, the efficient and reliable flow of the mixture within the oil-gas separation and air guide structure 30 is ensured.

[0076] like Figure 1 , Figure 8 and Figure 9 As shown, the scroll compressor also includes a plug 40 for sealing the positioning through-hole 13, such as... Figure 7 As shown, the sleeve 40 has a frustum-shaped annular structure with a through hole 41 inside. The connecting end of the air guide 34 passes through the through hole 41 and abuts against the inner wall of the through hole 41. The annular conical surface 42 on the outer circumference of the frustum-shaped annular structure fits against the inner wall of the positioning through hole 13. This design ensures the sealing effect of the sleeve 40 and also makes the sleeve 40 easy to process and install.

[0077] It should be noted that the design of the annular conical surface 42 on the outer periphery of the frustum structure enables the sleeve 40 to have anti-vibration deformation function, thereby reducing the vibration of gas acting on the connection between the gas guide 34 and the positioning through hole 13.

[0078] like Figure 2 and Figure 5 As shown, the circumferential section connecting the air guide end has a stepped shoulder 342, which abuts against the inner wall of the through hole 41; the stepped shoulder 342 abuts against one end of the sleeve 40 to axially limit the sleeve 40; the sleeve 40 is made of elastic material and is interference-fitted with the inner wall of the positioning through hole 13. By setting the interference fit between the sleeve 40 and the inner wall of the positioning through hole 13, the sealing effect of the sleeve 40 on the positioning through hole 13 is further improved.

[0079] like Figure 1 , Figure 8 and Figure 9As shown, the scroll compressor also includes a high-low pressure separator 50, which is located at one end of the scroll compressor structure 20 near the outlet 21 and within the main mounting cavity 11. The oil distribution and air guiding structure 30 and the high-low pressure separator 50 divide the main mounting cavity 11 from top to bottom into a high-pressure zone 111, a first oil accumulation zone 112, and a first oil collection zone 113, wherein the high-pressure zone 111, the first oil accumulation zone 112, and the first oil collection zone 113 are connected in sequence. The first oil accumulation zone 112 is located between the oil distribution and air guiding structure 30 and the high-low pressure separator 50. The first oil collection zone 113 and the first oil accumulation zone 112 are used to collect lubricating oil, and the high-pressure zone 111 is connected to the oil distribution and air guiding cavity 31 and the oil distribution cavity 12, respectively. By setting up a high-pressure zone 111, a first oil accumulation zone 112, and a first oil collection zone 113, the mixed substances can be collected and managed in separate zones, and the lubricating oil can be effectively collected in the first oil accumulation zone 112 and the first oil collection zone 113 to facilitate the subsequent circulation of the lubricating oil.

[0080] like Figure 1 , Figure 8 and Figure 9 As shown, the high-low pressure separator 50 has an oil collection channel 51, which connects the first oil accumulation area 112 and the first oil collection area 113. Lubricating oil flows from the first oil accumulation area 112 into the first oil collection area 113 under gravity through the oil collection channel 51. By providing the oil collection channel 51, it is ensured that the lubricating oil in the first oil accumulation area 112 can flow from the first oil accumulation area 112 into the first oil collection area 113 under gravity through the oil collection channel 51.

[0081] like Figure 1 , Figure 8 and Figure 9 As shown, the high-low pressure separator 50 includes a sealing body 52 and a separator 53. The sealing body 52 is connected to one end of the vortex compression structure 20 near the outlet 21 and is sealed to the inner wall of the main mounting cavity 11. One axial end of the separator 53 is connected to the sealing body 52, and the other axial end of the separator 53 abuts against the inner wall of the main mounting cavity 11. An oil collection channel 51 passes through the separator 53. A first oil accumulation area 112 is formed between the separator 53 and the oil distribution and air guiding structure 30, and a first oil collection area 113 is formed below the separator 53. This configuration simplifies the structure of the high-low pressure separator 50, ensures reliable operation, and also creates a first oil accumulation area 112 and a first oil collection area 113 arranged sequentially in the direction of gravity.

[0082] like Figure 1 , Figure 8 , Figure 9 and Figure 10As shown, the outer periphery of the sealing body 52 has a sealing ring groove 521. The scroll compressor also includes a sealing ring 60, which is disposed within the sealing ring groove 521 and engages with the inner wall of the sealing ring groove 521. The sealing body 52 and the inner wall of the main mounting cavity 11 are sealed together by the sealing ring 60. This arrangement ensures the sealing performance of the high and low pressure separator 50 with respect to the main mounting cavity 11, thereby preventing refrigerant and lubricating oil leakage.

[0083] Optionally, such as Figure 9 and Figure 10 As shown, in Embodiment 4 of the present invention, the sealing body 52 is a cylindrical structure, the partition body 53 is disposed inside the cylindrical structure, the lower part of the first oil collecting area 113 is the inner wall of the cylindrical structure, and the inner wall of the cylindrical structure has a through fourth oil passage 522, which is connected to the lower part of the first oil collecting area 113; the outer periphery of the cylindrical structure has a spiral oil passage 523, which is connected to the fourth oil passage 522; the compressor housing 10 has a return oil channel 14, which is connected to the spiral oil passage 523; wherein, the lubricating oil in the first oil collecting area 113 enters the interior of the scroll compressor structure 20 in sequence through the fourth oil passage 522, the spiral oil passage 523, and the return oil channel 14. By setting the spiral oil passage 523 to be connected to the fourth oil passage 522, it is ensured that the lubricating oil can smoothly enter the return oil channel 14. At the same time, the spiral oil passage 523 also realizes the effective regulation of the lubricating oil pressure.

[0084] It should be noted that when lubricating oil with a certain pressure enters the scroll compressor structure 20, it can not only lubricate the scroll compressor structure 20, but also effectively increase the pressure of the back pressure chamber 81, thereby ensuring the seal between the moving scroll and the stationary scroll inside the scroll compressor structure 20.

[0085] like Figure 1 , Figure 8 and Figure 9 As shown, the scroll compressor also includes an oil separator 70 disposed within the oil separation chamber 12, which is used to separate the refrigerant from the lubricating oil. A second oil collection area 121 is formed at the bottom of the oil separation chamber 12, which is used to collect the lubricating oil separated by the oil separator 70. The second oil collection area 121 is connected to the first oil collection area 113. By providing the oil separator 70, the oil-gas separation effect is further improved.

[0086] It should be noted that in this invention, the lubricating oil in the second oil collection area 121 enters the interior of the vortex compression structure 20 through the first oil collection area 113, the fourth oil passage 522, the spiral oil passage 523, and the return oil passage 14 in sequence to lubricate the vortex compression structure 20.

[0087] Optionally, such as Figure 1 and Figure 8As shown, in Embodiment 1 of the present invention, the sealing body 52 is a disc structure, the partition body 53 is disposed in the middle of the disc structure, and the lower part of the first oil collecting area 113 is the inner wall of the compressor housing 10 (i.e., the bottom wall of the total mounting cavity 11). The compressor housing 10 has an oil return channel 14, which communicates with the lower part of the first oil collecting area 113. The lubricating oil in the first oil collecting area 113 enters the interior of the scroll compressor structure 20 through the oil return channel 14. This arrangement ensures that the lubricating oil in the first oil collecting area 113 can smoothly enter the oil return channel 14.

[0088] like Figure 2 and Figure 5 As shown, the oil-gas separation and air-guiding structure 30 includes a multi-stage oil separator 33 and an air guide 34. The multi-stage oil separator 33 has an oil-gas separation chamber 331, and the air guide 34 has an air inlet chamber 35, which is connected to the air outlet 21. The oil-gas separation chamber 331 is connected to both the air inlet chamber 35 and the main mounting chamber 11. The air inlet chamber 35 and the oil-gas separation chamber 331 together form the oil-gas separation and air-guiding chamber 31. The oil-gas separation chamber 331 includes a first oil-gas separation chamber 3311, a second oil-gas separation chamber 3312, and a third oil-gas separation chamber 3313 connected in sequence. The first oil-gas separation chamber 3311 is connected to the air inlet chamber 35 and is connected to the first oil accumulation area 112 through a first oil passage 3314. The second oil-gas separation chamber 3312 is connected to the first oil accumulation area 112 through a second oil passage 3315. The third oil-gas separation chamber 3313 is connected to the high-pressure area 111. This is the configuration. This allows the first oil-gas separation chamber 3311, the second oil-gas separation chamber 3312, and the third oil-gas separation chamber 3313 to be connected to their respective areas, facilitating the zoned management of lubricating oil and mixed substances within the three chambers.

[0089] like Figure 2 and Figure 5 As shown, a second oil accumulation area 33111 for containing lubricating oil is formed at the bottom of the first oil-gas separation chamber 3311, and the second oil accumulation area 33111 is connected to the first oil accumulation area 112 through the first oil passage 3314; a third oil accumulation area 33121 for containing lubricating oil is formed at the bottom of the second oil-gas separation chamber 3312, and the third oil accumulation area 33121 is connected to the first oil accumulation area 112 through the second oil passage 3315. By setting the second oil accumulation area 33111 and the third oil accumulation area 33121, the lubricating oil collected in the first oil-gas separation chamber 3311 and the second oil-gas separation chamber 3312 is effectively contained and circulated.

[0090] like Figure 1 , Figure 8 and Figure 9As shown, the compressor housing 10 has an oil return channel 14, which connects the first oil collection area 113 and the interior of the scroll compressor structure. This arrangement allows the lubricating oil in the first oil collection area 113 to enter the interior of the scroll compressor structure 20 through the oil return channel 14 to lubricate the scroll compressor structure 20.

[0091] It should be noted that: in one specific embodiment of the present invention, such as Figure 1 and Figure 8 As shown, the scroll compressor also includes a throttling pressure reducer 110, which is disposed in the oil return passage 14 to regulate the flow and pressure in the oil return passage 14.

[0092] Specifically, such as Figure 1 , Figure 8 and Figure 9 As shown, the scroll compressor also includes an oil separator 70 disposed in the oil separator chamber 12, which is used to separate the refrigerant from the lubricating oil; the compressor housing 10 has an oil return channel 14, which is used to connect the oil separator chamber 12, the main mounting chamber 11 and the interior of the scroll compressor structure; the lubricating oil separated by the oil separator chamber 31 and the oil separator 70 is concentrated at the bottom of the main mounting chamber 11 and / or the oil separator chamber 12, and enters the interior of the scroll compressor structure through the oil return channel 14.

[0093] like Figure 1 , Figure 8 and Figure 9 As shown, a second oil collecting area 121 is formed at the bottom of the oil separating chamber 12. The second oil collecting area 121 is used to collect the lubricating oil separated by the oil separator 70; the second oil collecting area 121 is connected to the return oil channel 14. By setting the second oil collecting area 121, the lubricating oil collected in the oil separating chamber 12 can be effectively contained and circulated.

[0094] It is worth noting that when the scroll compressor is running, the mixture is discharged from the outlet 21 and first enters the inlet chamber 35. It stays briefly in the inlet chamber 35 to suppress exhaust noise and divert the flow. The mixture flows sequentially through the first oil-gas separation chamber 3311, the second oil-gas separation chamber 3312, and the third oil-gas separation chamber 3313 for oil-gas separation. It then enters the oil separator 12 through the main mounting chamber 11 and the connecting chamber 32. The oil separator 70 (e.g., a cyclone oil separator) performs oil-gas separation on the mixture again, thereby reducing the amount of lubricating oil discharged, improving the reliability of the scroll compressor, enhancing the heat exchange performance and overall energy efficiency of the scroll compressor, and reducing exhaust noise.

[0095] like Figure 1As shown, the scroll compressor also includes: a bracket 80, mounted on the compressor housing 10 and sealed to the housing 10; a bearing 90, mounted inside the bracket 80 and fitted with the inner wall of the bracket 80; wherein, a back pressure chamber 81 is provided between the bracket 80 and the scroll compression structure 20, and a bracket oil passage 82 is provided inside the bracket 80, which is connected to the oil return passage 14 and the back pressure chamber 81 respectively; a drive unit 100, the shaft 101 of which passes through the bearing 90; the shaft 101 is connected to the scroll compression structure 20, and the drive unit 100 is used to drive the scroll compression structure 20 to compress the refrigerant entering from the inlet. By providing the back pressure chamber 81, lubricating oil can flow to the bearing 90 for lubrication and be effectively stored in the back pressure chamber 81.

[0096] like Figure 1 , Figure 11 and Figure 12 As shown, the support oil passage 82 includes an oil inlet passage 821, multiple radial lubrication oil passages 822, a surrounding oil passage 823, and an oil outlet passage 824. The two ends of the oil inlet passage 821 are connected to the back pressure chamber 81 and the return oil channel 14, respectively. The radial lubrication oil passages 822 are connected to the back pressure chamber 81 and the surrounding oil passages 823, respectively. The multiple radial lubrication oil passages 822 are spaced apart circumferentially along the bearing 90, and are used to guide lubricating oil into the bearing 90. The surrounding oil passages 823 are arranged circumferentially around the bearing 90 and are connected to the oil outlet passage 824. The oil outlet passage 824 is connected to the interior of the drive unit 100 to deliver lubricating oil into the drive unit 100. This arrangement allows the support oil passage 82 to efficiently lubricate the bearing 90 through the multiple radial lubrication oil passages 822, thereby improving the reliability of the scroll compressor during long-term high-speed operation.

[0097] like Figure 1 As shown, the scroll compressor also includes a throttling pressure reducer 110, which is installed in the oil outlet passage 824 to regulate the flow and pressure in the oil outlet passage 824.

[0098] In summary, this invention provides a scroll compressor. By setting up an oil-separating and air-guiding structure 30, the invention effectively separates the refrigerant and lubricating oil discharged from the outlet 21 of the scroll compressor structure 20. By setting the oil-separating and air-guiding chamber 31 to connect sequentially through the main mounting chamber 11 and the connecting chamber 32 to the oil-separating chamber 12, multi-chamber graded oil separation is achieved, thereby effectively reducing the oil carryover rate and oil discharge volume during the scroll compressor's discharge. This effectively avoids lubricating oil waste and improves the reliability of the scroll compressor during long-term high-speed operation. By setting the oil-separating and air-guiding chamber 31 and the connecting chamber 32 to connect to the main mounting chamber 11 respectively, the lubricating oil separated in the oil-separating and air-guiding chamber 31 and the connecting chamber 32 can be effectively stored and circulated, thereby improving the oil storage capacity of the scroll compressor. Furthermore, it also provides the necessary structural support for the subsequent oil return of the scroll compressor, enabling the scroll compressor structure 20 to be lubricated efficiently and stably.

[0099] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0100] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0101] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms 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, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0102] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0103] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0104] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A scroll compressor, characterized in that, include: The compressor housing (10) has a main mounting cavity (11) and an oil distribution cavity (12) inside. A vortex compression structure (20) having one end with an outlet (21) located within the main mounting cavity (11); An oil-separating and air-guiding structure (30) is disposed within the main mounting cavity (11); the oil-separating and air-guiding structure (30) is used to separate the refrigerant from the lubricating oil; the oil-separating and air-guiding structure (30) has an oil-separating and air-guiding chamber (31) inside, and the inlet of the oil-separating and air-guiding chamber (31) is connected to the outlet (21); one end of the oil-separating and air-guiding structure (30) away from the vortex compression structure (20) is a connecting air-guiding end, which is inserted into the inner wall of the main mounting cavity (11); the connecting air-guiding end has a connecting cavity (32) inside, one end of the connecting cavity (32) is connected to the main mounting cavity (11), and the other end of the connecting cavity (32) is connected to the oil-separating cavity (12); the oil-separating and air-guiding chamber (31) is connected to the oil-separating cavity (12) through the main mounting cavity (11) and the connecting cavity (32); The scroll compressor also includes an oil separator (70) disposed in the oil separator chamber (12), the oil separator (70) being used to separate the refrigerant from the lubricating oil; the compressor housing (10) has an oil return channel (14), the oil return channel (14) being used to connect the interior of the oil separator chamber (12), the main mounting chamber (11) and the scroll compressor structure (20); the lubricating oil separated by the oil separator chamber (31) and the oil separator (70) is concentrated at the bottom of the main mounting chamber (11) and / or the oil separator chamber (12), and enters the interior of the scroll compressor structure (20) through the oil return channel (14).

2. The scroll compressor according to claim 1, characterized in that, The compressor housing (10) also has a positioning through hole (13) inside, which connects the oil distribution chamber (12) and the main mounting chamber (11); the connecting air guide end extends into the positioning through hole (13) and is limited to the inner wall of the positioning through hole (13).

3. The scroll compressor according to claim 2, characterized in that, The oil-separating and air-guiding structure (30) includes a multi-stage oil separator (33) and an air guide (34). The air guide (34) fixes the multi-stage oil separator (33) on the vortex compression structure (20). The connecting air guide end is located on the air guide (34).

4. The scroll compressor according to claim 3, characterized in that, The end of the air guide (34) away from the connecting air guide end is the connecting insertion end; the interior of the connecting insertion end has an air inlet chamber (35), which is connected to the air outlet (21); the multi-stage oil separator (33) has an oil-gas separation chamber (331), and the connecting insertion end is inserted into the oil-gas separation chamber (331); the oil-gas separation chamber (331) is connected to the air inlet chamber (35) and the main installation chamber (11) respectively; the air inlet chamber (35) and the oil-gas separation chamber (331) together form the oil-separating air guide chamber (31); wherein, the mixed substance blown out by the air outlet (21) passes through the air inlet chamber (35) and the oil-gas separation chamber (331) in sequence and enters the main installation chamber (11).

5. The scroll compressor according to claim 4, characterized in that, The connecting insertion end passes through the oil-gas separation chamber (331) and is threadedly connected to the vortex compression structure (20); the outer periphery of the air guide (34) has a positioning shoulder (341), one end of the multi-stage oil separator (33) abuts against the vortex compression structure (20), and the other end of the multi-stage oil separator (33) abuts against the positioning shoulder (341).

6. The scroll compressor according to claim 4, characterized in that, The oil-gas separation chamber (331) includes a first oil-gas separation chamber (3311), a second oil-gas separation chamber (3312), and a third oil-gas separation chamber (3313) connected in sequence. The first oil-gas separation chamber (3311) is connected to the air intake chamber (35) and is connected to the main mounting chamber (11) through a first oil passage (3314). The second oil-gas separation chamber (3312) is connected to the main mounting chamber (11) through a second oil passage (3315). The third oil-gas separation chamber (3313) is connected to the main mounting chamber (11).

7. The scroll compressor according to claim 6, characterized in that, The inner wall of the oil-gas separation chamber (331) has an insertion hole (3316), and the connecting insertion end passes through the insertion hole (3316); the first oil-gas separation chamber (3311) is connected to the second oil-gas separation chamber (3312) through the insertion hole (3316), and the second oil-gas separation chamber (3312) is connected to the third oil-gas separation chamber (3313) through the circumferential air passage (38), and the circumferential air passage (38) is arranged around the circumference of the multi-stage oil separator (33).

8. The scroll compressor according to claim 7, characterized in that, The multi-stage oil separator (33) includes a cylindrical body (3317) and an end cap (3318) disposed on the cylindrical body (3317). The first oil passage (3314) passes through the cylindrical body (3317). The second oil passage (3315) passes through the cylindrical body (3317) and the end cap (3318) in sequence. Alternatively, there is a gap between the cylindrical body (3317) and the end cap (3318) to form the second oil passage (3315). The cross-sectional area of ​​the second oil passage (3315) is not greater than a circular area with a diameter of 2 mm.

9. The scroll compressor according to claim 5, characterized in that, The interior of the connecting insertion end also has a first air passage (36), and the air inlet chamber (35) is connected to the oil-gas separation chamber (331) through the first air passage (36); the interior of the connecting air guide end also has a second air passage (37), and the connecting chamber (32) is connected to the total installation chamber (11) through the second air passage (37); wherein, the cross-sectional area of ​​the first air passage (36), the air inlet chamber (35), the second air passage (37) and the connecting chamber (32) are all greater than the cross-sectional area of ​​the air outlet (21).

10. The scroll compressor according to claim 4, characterized in that, The scroll compressor also includes a plug (40) for sealing the positioning through hole (13). The plug (40) is a frustum annular structure with a through hole (41) inside. The connecting air guide end of the air guide (34) passes through the through hole (41) and abuts against the inner wall of the through hole (41). The annular conical surface (42) on the outer periphery of the frustum annular structure fits against the inner wall of the positioning through hole (13).

11. The scroll compressor according to claim 10, characterized in that, The connecting air guide end has a stepped shoulder (342) in the circumferential direction, and the stepped shoulder (342) abuts against the inner wall of the through hole (41); the stepped shoulder (342) abuts against one end of the sleeve (40) to axially limit the sleeve (40); the sleeve (40) is made of elastic material, and the sleeve (40) is interference-fitted with the inner wall of the positioning through hole (13).

12. The scroll compressor according to claim 1, characterized in that, The scroll compressor also includes a high-low pressure separator (50), which is disposed at one end of the scroll compressor structure (20) near the outlet (21) and located in the main mounting cavity (11). The oil-separating and air-guiding structure (30) and the high-low pressure separator (50) divide the main mounting cavity (11) from top to bottom into a high-pressure zone (111), a first oil accumulation zone (112), and a first oil collection zone (113), wherein the high-pressure zone (111), the first oil accumulation zone (112), and the first oil collection zone (113) are connected in sequence. The first oil accumulation zone (112) is located between the oil-separating and air-guiding structure (30) and the high-low pressure separator (50). The first oil collection zone (113) and the first oil accumulation zone (112) are used to collect lubricating oil, and the high-pressure zone (111) is connected to the oil-separating and air-guiding cavity (31) and the oil-separating cavity (12), respectively.

13. The scroll compressor according to claim 12, characterized in that, The high and low pressure separator (50) has an oil collection channel (51) for connecting the first oil accumulation area (112) and the first oil collection area (113); wherein, under the action of gravity, lubricating oil flows from the first oil accumulation area (112) through the oil collection channel (51) into the first oil collection area (113).

14. The scroll compressor according to claim 13, characterized in that, The high-low pressure separator (50) includes a sealing body (52) and a separator (53). The sealing body (52) is connected to one end of the vortex compression structure (20) near the outlet (21) and is sealed to the inner wall of the main mounting cavity (11). One axial end of the separator (53) is connected to the sealing body (52), and the other axial end of the separator (53) abuts against the inner wall of the main mounting cavity (11). The oil collection channel (51) passes through the separator (53). The first oil accumulation area (112) is formed between the separator (53) and the oil distribution and air guiding structure (30), and the first oil collection area (113) is formed below the separator (53).

15. The scroll compressor according to claim 14, characterized in that, The outer periphery of the sealing body (52) has a sealing ring groove (521), and the scroll compressor also includes a sealing ring (60). The sealing ring (60) is disposed in the sealing ring groove (521) and is limited to the inner wall of the sealing ring groove (521). The sealing body (52) and the inner wall of the total mounting cavity (11) are sealed by the sealing ring (60).

16. The scroll compressor according to claim 14, characterized in that, The sealing body (52) is a cylindrical structure, and the partition body (53) is disposed inside the cylindrical structure. The inner wall of the cylindrical structure is below the first oil collection area (113). The inner wall of the cylindrical structure has a through fourth oil passage (522), which is connected to the lower part of the first oil collection area (113). The outer periphery of the cylindrical structure has a spiral oil passage (523), which is connected to the fourth oil passage (522). The compressor housing (10) has a return oil channel (14), which is connected to the spiral oil passage (523). The lubricating oil in the first oil collection area (113) enters the interior of the scroll compressor structure (20) in sequence through the fourth oil passage (522), the spiral oil passage (523), and the return oil channel (14).

17. The scroll compressor according to claim 16, characterized in that, The scroll compressor also includes an oil separator (70) disposed in the oil separator chamber (12), the oil separator (70) being used to separate the refrigerant from the lubricating oil; a second oil collection area (121) is formed at the bottom of the oil separator chamber (12), the second oil collection area (121) being used to collect the lubricating oil separated by the oil separator (70); the second oil collection area (121) is connected to the first oil collection area (113).

18. The scroll compressor according to claim 14, characterized in that, The sealing body (52) is a disc structure, and the partition body (53) is located in the middle of the disc structure. The lower part of the first oil collection area (113) is the inner wall of the compressor housing (10). The compressor housing (10) has an oil return channel (14) inside, and the oil return channel (14) is connected to the lower part of the first oil collection area (113). The lubricating oil in the first oil collection area (113) enters the interior of the scroll compression structure (20) through the oil return channel (14).

19. The scroll compressor according to claim 12, characterized in that, The oil-gas separation and air-guiding structure (30) includes a multi-stage oil separator (33) and an air guide (34). The multi-stage oil separator (33) has an oil-gas separation chamber (331), and the air guide (34) has an air inlet chamber (35). The air inlet chamber (35) is connected to the air outlet (21). The oil-gas separation chamber (331) is connected to the air inlet chamber (35) and the main mounting chamber (11) respectively. The air inlet chamber (35) and the oil-gas separation chamber (331) together form the oil-gas separation and air-guiding chamber (31). (331) includes a first oil-gas separation chamber (3311), a second oil-gas separation chamber (3312) and a third oil-gas separation chamber (3313) connected in sequence. The first oil-gas separation chamber (3311) is connected to the air intake chamber (35) and is connected to the first oil accumulation area (112) through the first oil passage (3314). The second oil-gas separation chamber (3312) is connected to the first oil accumulation area (112) through the second oil passage (3315). The third oil-gas separation chamber (3313) is connected to the high pressure area (111).

20. The scroll compressor according to claim 19, characterized in that, The bottom of the first oil-gas separation chamber (3311) forms a second oil accumulation area (33111) for containing lubricating oil, and the second oil accumulation area (33111) is connected to the first oil accumulation area (112) through the first oil passage (3314); the bottom of the second oil-gas separation chamber (3312) forms a third oil accumulation area (33121) for containing lubricating oil, and the third oil accumulation area (33121) is connected to the first oil accumulation area (112) through the second oil passage (3315).

21. The scroll compressor according to claim 12, characterized in that, The compressor housing (10) has an oil return channel (14) inside, which is used to connect the first oil collection area (113) and the interior of the scroll compression structure (20).

22. The scroll compressor according to claim 1, characterized in that, The bottom of the oil separation chamber (12) forms a second oil collection area (121), which is used to collect the lubricating oil separated by the oil separator (70); the second oil collection area (121) is connected to the oil return channel (14).

23. The scroll compressor according to claim 1, characterized in that, The scroll compressor also includes: A bracket (80) is disposed on the compressor housing (10) and is sealed to the compressor housing (10); The bearing (90) is disposed inside the bracket (80) and is limited to the inner wall of the bracket (80); The bracket (80) and the vortex compression structure (20) are provided with a back pressure cavity (81), and the bracket (80) is provided with a bracket oil passage (82), which is connected to the return oil channel (14) and the back pressure cavity (81) respectively. A drive unit (100) has a shaft (101) that passes through the bearing (90); the shaft (101) is connected to the vortex compression structure (20), and the drive unit (100) is used to drive the vortex compression structure (20) to compress the refrigerant entering from the air inlet.

24. The scroll compressor according to claim 23, characterized in that, The support oil passage (82) includes an inlet oil passage (821), multiple radial lubrication oil passages (822), a surrounding oil passage (823), and an outlet oil passage (824). The two ends of the inlet oil passage (821) are connected to the back pressure chamber (81) and the return oil channel (14), respectively. The radial lubrication oil passages (822) are connected to the back pressure chamber (81) and the surrounding oil passages (823), respectively. The multiple radial lubrication oil passages (822) are arranged at intervals along the circumference of the bearing (90). The radial lubrication oil passages (822) are used to guide lubricating oil into the bearing (90). The surrounding oil passages (823) are arranged around the circumference of the bearing (90) and are connected to the outlet oil passage (824). The outlet oil passage (824) is connected to the interior of the drive unit (100) to deliver lubricating oil into the drive unit (100).

25. The scroll compressor according to claim 24, characterized in that, The scroll compressor also includes a throttling pressure reducer (110), which is disposed in the oil outlet passage (824) to regulate the flow and pressure in the oil outlet passage (824).

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