Pump body assembly and compressor having the same

Abstract

This invention provides a pump body assembly and a compressor having the same. The pump body assembly includes: a stationary scroll and a moving scroll, forming a compression chamber between the stationary and moving scrolls; a bracket with a mounting groove, wherein at least a portion of the moving scroll is disposed within the mounting groove; a first receiving groove is provided on the wall of the mounting groove, the first receiving groove including a first groove segment and a second groove segment connected to each other, the first groove segment communicating with the oil outlet of an oil sump to allow lubricating medium in the oil sump to enter the first groove segment; the second groove segment communicating with the compression chamber; wherein, a return oil channel communicating with the oil sump is provided within the bracket, the return oil inlet of the return oil channel being located at at least a portion of the groove wall of the second groove segment; at least a portion of the second groove segment is higher than the first groove segment. The technical solution provided by this invention can solve the technical problem of poor lubrication between the moving and stationary scrolls in the prior art.

Description

Technical Field

[0001] This invention relates to the field of pump body assembly technology, and more specifically, to a pump body assembly and a compressor having the same. Background Technology

[0002] Currently, scroll compressors are positive displacement compressors. The compression component consists of a moving scroll and a stationary scroll. During compression, the relative revolution between the moving and stationary scrolls achieves a continuous change in the enclosed volume between them, thus compressing the gas. The contact surfaces of the moving and stationary scrolls are sealed by a sliding friction pair, which requires lubricating oil for lubrication. In existing technology, high-pressure lubricating oil from the oil sump is typically pumped into the upper end of the crankshaft using an oil pump. From there, the oil enters the oil sump inside the upper support, and then flows through an oil passage to the sliding friction pair for lubrication. Excess oil flows back to the oil sump at the bottom of the compressor through a return pipe.

[0003] However, in the existing technology, the oil return port of the oil return pipe is usually located at the bottom of the oil sump inside the upper bracket. When the compressor operates at low frequency, the lubricating oil often cannot fill the oil sump inside the upper bracket and flows back to the oil sump at the bottom of the compressor from the oil return pipe. This results in insufficient lubricating oil at the sliding friction pair, which affects the lubrication effect and causes wear on structures such as the moving scroll, stationary scroll and upper bracket, thus affecting the service life of the compressor. Summary of the Invention

[0004] The main objective of this invention is to provide a pump body assembly and a compressor having the same, so as to solve the technical problem of poor lubrication between the moving scroll and the stationary scroll in the prior art.

[0005] To achieve the above objectives, according to one aspect of the present invention, a pump body assembly is provided, comprising:

[0006] A compression cavity is formed between a stationary scroll plate and a moving scroll plate;

[0007] The bracket has a mounting groove, and at least a portion of the moving scroll is disposed in the mounting groove. The wall of the mounting groove has a first receiving groove, which includes a first groove section and a second groove section connected to each other. The first groove section is connected to the oil outlet of the oil sump so that the lubricating medium in the oil sump can enter the first groove section. The second groove section is used to communicate with the compression chamber.

[0008] The support frame is equipped with an oil return channel that is connected to the oil tank. The oil return inlet of the oil return channel is located at least part of the tank wall of the second tank section. At least part of the second tank section is higher than the first tank section.

[0009] Furthermore, the first receiving groove is located between the support and the moving scroll, the first groove segment is located on the side of the second groove segment away from the moving scroll, and the groove wall of the first groove segment protrudes from the groove wall of the second groove segment to form a stepped surface between the first groove segment and the second groove segment;

[0010] The oil return inlet is located at the step surface.

[0011] Furthermore, the volume of the first tank section is greater than the volume of the second tank section; and / or,

[0012] Along the arrangement direction from the support to the moving scroll, the height of the first slot section is greater than the height of the second slot section; and / or,

[0013] The return oil inlet is positioned higher than the return oil outlet of the return oil channel, which is a bend in the return oil channel.

[0014] Furthermore, the mounting groove wall is provided with a second receiving groove for communicating with the compression chamber; the second groove section is used to communicate with the second receiving groove;

[0015] The second receiving tank is intermittently connected to the compression chamber so that the pressure in the second receiving tank is the same as the pressure in the compression chamber.

[0016] Furthermore, the pump body assembly also includes:

[0017] A sealing element is disposed within the first receiving groove and located at the connection opening where the first receiving groove and the second receiving groove communicate, so as to block the connection opening;

[0018] The seal is provided with an oil passage notch so that the lubricating medium in the first receiving groove can flow into the second receiving groove through the oil passage notch.

[0019] Furthermore, both the first and second receiving slots are located between the support and the moving scroll.

[0020] Wherein, at least a portion of the bracket and at least a portion of the moving scroll are clearance-fitted to form an oil passage for connecting the first receiving groove and the second receiving groove; a seal is disposed at the communication point between the oil passage and the first receiving groove; and / or,

[0021] The pump body assembly also includes an elastic element disposed in the first receiving groove. One end of the elastic element is connected to or abuts against the groove wall of the first receiving groove, and the other end of the elastic element is connected to or abuts against the sealing element so that the sealing element abuts against the moving scroll.

[0022] Furthermore, at least a portion of the stationary scroll plate is connected to the support, and at least a portion of the stationary scroll plate is provided with a communicating oil groove for communicating with the second receiving groove; the moving scroll plate is movably disposed to move to a first lubrication position that connects the compression chamber with the communicating oil groove or a second lubrication position that connects the communicating oil groove with the second receiving groove.

[0023] Furthermore, an oil channel is provided on the side of the moving scroll near the support, the oil channel being used to store the lubricating medium; the moving scroll is movably configured to move to a first movable position that connects the oil channel with the first receiving groove or a second movable position that connects the oil channel with the second receiving groove.

[0024] Furthermore, the oil tank is an annular tank; or,

[0025] The oil transport trough includes a first oil transport trough and a second oil transport trough arranged at intervals; when the moving scroll is in the first active position, one of the first oil transport trough and the second oil transport trough is connected to the first receiving trough, and the other of the first oil transport trough and the second oil transport trough is connected to the second receiving trough; when the moving scroll is in the second active position, one of the first oil transport trough and the second oil transport trough is connected to the second receiving trough, and the other of the first oil transport trough and the second oil transport trough is connected to the first receiving trough.

[0026] According to another aspect of the present invention, a compressor is provided, comprising:

[0027] The pump body assembly described above;

[0028] The main housing forms a receiving cavity, and the pump body assembly is disposed within the receiving cavity;

[0029] An oil sump is located inside the receiving cavity; the oil sump is used to store the lubricating medium.

[0030] By applying the technical solution of this invention, the first receiving tank can be configured as a first tank segment and a second tank segment connected to each other. The first tank segment communicates with the oil outlet of the oil sump, and the second tank segment communicates with the compression chamber. At least a portion of the second tank segment is higher than the first tank segment, and the oil return inlet of the return oil channel is located on the tank wall of the portion of the second tank segment that is higher than the first tank segment. This ensures that the lubricating medium entering the first receiving tank from the oil sump will not prematurely flow back to the oil sump from the return oil channel, thereby guaranteeing the amount of lubricating medium flowing into the compression chamber from the second tank segment. Consequently, the moving scroll can be lubricated even when the pumped oil is insufficient. Therefore, the technical solution of this invention can solve the technical problem of poor lubrication between the moving scroll and the stationary scroll in the prior art. Attached Figure Description

[0031] 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:

[0032] Figure 1 A schematic diagram of the compressor provided according to Embodiment 3 of the present invention is shown;

[0033] Figure 2 It shows Figure 1Enlarged structural diagram at point A;

[0034] Figure 3 It shows Figure 1 Enlarged structural diagram at point B;

[0035] Figure 4 A schematic diagram of a portion of the structure of the pump body assembly provided according to Embodiment 1 of the present invention is shown;

[0036] Figure 5 A cross-sectional view of a portion of the structure of a pump body assembly provided according to Embodiment 1 of the present invention is shown;

[0037] Figure 6 A schematic diagram of the static vortex disk of the pump body assembly provided according to Embodiment 1 of the present invention is shown;

[0038] Figure 7 A schematic diagram of the moving scroll of the pump body assembly provided according to Embodiment 1 of the present invention is shown;

[0039] Figure 8 A top view of the seal of a pump body assembly provided according to Embodiment 1 of the present invention is shown;

[0040] Figure 9 A bottom view of the moving scroll of the pump body assembly provided according to Embodiment 1 of the present invention in the first active position is shown;

[0041] Figure 10 A bottom view of the moving scroll of the pump body assembly provided according to Embodiment 1 of the present invention in the second active position is shown;

[0042] Figure 11 A bottom view of the moving scroll of the pump body assembly provided according to Embodiment 2 of the present invention in the first active position is shown;

[0043] Figure 12 A bottom view of the moving scroll of the pump body assembly provided according to Embodiment 2 of the present invention in the second active position is shown.

[0044] The above figures include the following reference numerals:

[0045] 10. Static scroll plate; 11. Connecting oil groove; 12. First sealing surface; 13. Second sealing surface; 14. Static scroll plate compression chamber;

[0046] 20. Moving scroll; 21. Oil channel; 211. First oil channel; 212. Second oil channel; 22. Base plate sealing surface; 23. Outer support surface; 24. Cross slip ring groove; 25. Bearing housing;

[0047] 30. Support; 31. Oil return channel; 311. Oil return inlet; 312. First oil return section; 313. Second oil return section; 32. Step surface;

[0048] 41. First receiving tank; 411. First tank section; 412. Second tank section; 42. Second receiving tank;

[0049] 50. Seals; 51. Oil passage notch;

[0050] 60. Oil passage gap;

[0051] 70. Cross slip ring;

[0052] 80. Elastic components;

[0053] 1. Main shell;

[0054] 2. Oil bath;

[0055] 3. Electric motor;

[0056] 4. Lower support;

[0057] 5. Oil pump;

[0058] 6. Crankshaft; 61. Oil suction channel. Detailed Implementation

[0059] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0060] like Figures 1 to 10 As shown, Embodiment 1 of the present invention provides a pump body assembly, which includes a stationary volute 10 and a moving volute 20, forming a compression chamber between the stationary volute 10 and the moving volute 20. The pump body assembly also includes a bracket 30, on which an mounting groove is provided, and at least a portion of the moving volute 20 is disposed within the mounting groove. A first receiving groove 41 is provided on the groove wall of the mounting groove, the first receiving groove 41 including a first groove segment 411 and a second groove segment 412 connected to each other. The first groove segment 411 communicates with the oil outlet of the oil sump 2, so that the lubricating medium in the oil sump 2 enters the first groove segment 411; the second groove segment 412 is used to communicate with the compression chamber. The bracket 30 is provided with a return oil channel 31 communicating with the oil sump 2, and the return oil inlet 311 of the return oil channel 31 is located at at least a portion of the groove wall of the second groove segment 412; at least a portion of the second groove segment 412 is positioned higher than the first groove segment 411.

[0061] By employing the pump assembly provided in Embodiment 1 of the present invention, the first receiving groove 41 can be configured as a first groove segment 411 and a second groove segment 412 connected to each other. The first groove segment 411 communicates with the oil outlet of the oil sump 2, and the second groove segment 412 communicates with the compression chamber. At least a portion of the second groove segment 412 is positioned higher than the first groove segment 411, and the oil return inlet 311 of the oil return channel 31 is located on the groove wall of the portion of the second groove segment 412 that is higher than the first groove segment 411. This ensures that the lubricating medium entering the first receiving groove 41 from the oil sump 2 does not prematurely flow back to the oil sump 2 from the oil return channel 31, thereby guaranteeing the amount of lubricating medium flowing into the compression chamber from the second groove segment 412. Consequently, the moving scroll 20 can be lubricated even when the pump oil is insufficient. Therefore, the pump assembly provided in this embodiment can solve the technical problem of poor lubrication between the moving scroll and the stationary scroll in the prior art.

[0062] Specifically, in order to facilitate lubrication of the stationary scroll 10 and the moving scroll 20, the lubricating medium is lubricating oil. Figure 1 and Figure 3 The arrows in the diagram indicate the direction of lubricant flow.

[0063] Specifically, "at least a portion of the second slot 412 is positioned higher than the first slot 411" means that in the arrangement direction along the support 30 to the moving scroll 20, at least a portion of the second slot 412 is positioned higher than the first slot 411.

[0064] Specifically, the moving scroll 20 is movably disposed in the mounting groove to change the volume of the compression chamber and achieve the purpose of compressing gas.

[0065] Specifically, the first receiving groove 41 is located between the support 30 and the moving scroll 20. The first groove segment 411 is located on the side of the second groove segment 412 away from the moving scroll 20. The groove wall of the first groove segment 411 protrudes from the groove wall of the second groove segment 412, forming a stepped surface 32 between the first groove segment 411 and the second groove segment 412. The oil return inlet 311 is located at the stepped surface 32. This structural arrangement raises the position of the oil return inlet 311 within the first receiving groove 41, preventing the lubricating medium entering the first receiving groove 41 from the oil sump 2 from prematurely flowing back to the oil sump 2 through the oil return channel 31. Simultaneously, this arrangement ensures that the orientation of the oil return inlet 311 is consistent with the flow direction of the lubricating medium within the first receiving groove 41, further reducing the risk of premature oil return and guaranteeing the lubrication effect between the moving scroll 20 and the stationary scroll 10.

[0066] Specifically, the volume of the first groove section 411 is greater than the volume of the second groove section 412. With this structural arrangement, the flow velocity of the lubricating medium in the first receiving groove 41 can be further increased by the volume change in the first receiving groove 41, so that the lubricating medium can flow continuously to the compression chamber and lubricate the moving scroll 20 and the stationary scroll 10.

[0067] Specifically, "the volume of the first groove segment 411" refers to the volume of the portion within the first groove segment 411 used to hold the lubricating medium, that is, the difference between the total volume of the first groove segment 411 and the volume of the structural parts installed within the first groove segment 411. "The volume of the second groove segment 412" refers to the volume of the portion within the second groove segment 412 used to hold the lubricating medium, that is, the difference between the total volume of the second groove segment 412 and the volume of the structural parts installed within the second groove segment 412.

[0068] Specifically, in order to better improve the oil filling speed in the first receiving tank 41, the ratio of the volume of the first tank section 411 to the volume of the second tank section 412 is greater than or equal to 2.

[0069] Specifically, along the arrangement direction from the support 30 to the moving scroll 20, the height of the first groove section 411 is greater than the height of the second groove section 412. This structural arrangement allows for a change in volume within the first receiving groove 41 due to the height difference between the first groove section 411 and the second groove section 412. This increases the flow velocity of the lubricating medium within the first receiving groove 41, ensuring a continuous flow of lubricating medium to the compression chamber and lubricate both the moving scroll 20 and the stationary scroll 10.

[0070] Specifically, the return oil inlet 311 is positioned higher than the return oil outlet of the return oil channel 31, which is a bent channel. This structural arrangement better ensures the oil filling efficiency in the first receiving tank 41 and avoids premature oil return.

[0071] Specifically, the oil return channel 31 includes a first oil return section 312 and a second oil return section 313 connected at a preset angle. The first oil return section 312 extends along the extension direction of the first groove section 411. This structural arrangement ensures that the extension direction of the first oil return section 312 is consistent with the flow direction of the lubricating medium in the first receiving groove 41, further reducing the risk of premature oil return and ensuring the lubrication effect between the moving scroll 20 and the stationary scroll 10.

[0072] Specifically, such as Figure 5As shown, h is the height from the step surface 32 to the outlet of the first return oil section 312, and H is the height of the second groove section 412, where H ≤ h. This structural arrangement allows for volume variation within the first receiving groove 41 through the height difference, thereby increasing the flow velocity of the lubricating medium within the first receiving groove 41. This ensures that the lubricating medium can continuously flow to the compression chamber and lubricate the moving scroll 20 and the stationary scroll 10.

[0073] Specifically, in order to further increase the volume difference and ensure the oil intake rate in the compression chamber when the pump oil is low, 3H≤h.

[0074] In this embodiment, a second receiving groove 42 for communicating with the compression chamber is provided on the groove wall of the mounting groove; a second groove section 412 is used to communicate with the second receiving groove 42. The second receiving groove 42 is intermittently connected to the compression chamber so that the pressure inside the second receiving groove 42 is the same as the pressure inside the compression chamber. Specifically, the lubricating medium flowing from the oil sump 2 into the first receiving groove 41 is high-pressure oil. This structural arrangement avoids the processing problems caused by directly introducing high-pressure oil into the compression chamber. In the prior art, high-pressure oil is usually introduced into the support 30 to lubricate between the moving scroll 20 and the stationary scroll 10 by opening a high-pressure oil passage. However, this high-pressure oil passage has poor processing economy and is prone to leakage. In this embodiment, by filling the second receiving groove 42 with oil, and supplying oil to the compression chamber through the second receiving groove 42 with the same pressure as the compression chamber, processing is easier and the problem of leakage in the high-pressure oil passage is avoided. Meanwhile, since the oil flowing out of the first receiving tank 41 is high-pressure oil, this setting can ensure that the high-pressure oil can continuously enter the second receiving tank 42 under the action of pressure changes, thereby ensuring the amount of oil in the second receiving tank 42.

[0075] Specifically, the pump assembly also includes a seal 50, which is disposed within the first receiving groove 41 and located at the connection point between the first receiving groove 41 and the second receiving groove 42 to seal the connection point. The seal 50 has an oil passage notch 51, allowing the lubricating medium in the first receiving groove 41 to flow into the second receiving groove 42 via the oil passage notch 51. This structural arrangement separates the first receiving groove 41 and the second receiving groove 42 through the seal 50, ensuring that communication between them is solely through the oil passage notch 51, thereby enabling better control of the oil flow rate.

[0076] Specifically, to better ensure the sealing effect, the seal 50 is a PTFE (polytetrafluoroethylene containing carbon fiber) seal.

[0077] Specifically, both the first receiving groove 41 and the second receiving groove 42 are located between the bracket 30 and the moving scroll 20. At least a portion of the bracket 30 and at least a portion of the moving scroll 20 are clearance-fitted to form an oil passage gap 60 connecting the first receiving groove 41 and the second receiving groove 42. A seal 50 is disposed at the connection between the oil passage gap 60 and the first receiving groove 41. This structural arrangement, with the clearance fit between at least a portion of the bracket 30 and at least a portion of the moving scroll 20 forming the oil passage gap 60, facilitates the flow of lubricating oil through the movement of the moving scroll 20 relative to the bracket 30. Placing the seal 50 at the connection between the oil passage gap 60 and the first receiving groove 41 further ensures better sealing and control of the oil flow rate.

[0078] Specifically, both the first receiving groove 41 and the second receiving groove 42 are located between the bracket 30 and the moving scroll 20. The pump body assembly also includes an elastic element 80, which is disposed within the first receiving groove 41. One end of the elastic element 80 is connected to or abuts against the wall of the first receiving groove 41, and the other end is connected to or abuts against the sealing element 50, so that the sealing element 50 abuts against the moving scroll 20. This structural arrangement allows the sealing element 50 to be supported and fixed by the elastic element 80, ensuring that the sealing element 50 remains in contact with the moving scroll 20 and preventing the sealing element 50 from failing to provide a seal when the moving scroll 20 is in motion.

[0079] Specifically, the first groove segment 411 is located on the side of the second groove segment 412 away from the moving scroll 20. The groove wall of the first groove segment 411 protrudes beyond the groove wall of the second groove segment 412, forming a stepped surface 32 between the first groove segment 411 and the second groove segment 412. The pump body assembly also includes an elastic element 80, which is disposed within the first receiving groove 41. One end of the elastic element 80 is connected to or abuts against the stepped surface 32, and the other end is connected to or abuts against the sealing element 50, so that the sealing element 50 abuts against the moving scroll 20. This structural arrangement allows the sealing element 50 to be supported and fixed by the elastic element 80, ensuring that the sealing element 50 remains in contact with the moving scroll 20 and preventing the sealing element 50 from failing to provide a seal when the moving scroll 20 is in motion.

[0080] Specifically, the elastic element 80 is a spring.

[0081] Specifically, the sealing element 50 is a sealing ring. Specifically, there are multiple elastic elements 80, which are spaced apart circumferentially along the sealing ring. This structural arrangement better ensures the contact between the sealing ring and the moving scroll 20, further guaranteeing the sealing effect.

[0082] In this embodiment, at least a portion of the stationary scroll plate 10 is connected to the support 30, and at least a portion of the stationary scroll plate 10 is provided with a communicating oil groove 11 for communicating with the second receiving groove 42; the moving scroll plate 20 is movably disposed to move to a first lubrication position that connects the compression chamber with the communicating oil groove 11 or a second lubrication position that connects the communicating oil groove 11 with the second receiving groove 42. With this structural arrangement, the lubricating medium in the second receiving groove 42 can be transported to the friction surface between the moving scroll plate 20 and the stationary scroll plate 10 in the compression chamber for lubrication by means of the communicating oil groove 11 and the movement of the moving scroll plate 20.

[0083] Specifically, the moving scroll 20 has an oil channel 21 on the side near the support 30, which is used to store lubricating medium. The moving scroll 20 is movably configured to move to a first movable position that connects the oil channel 21 to the first receiving groove 41 or a second movable position that connects the oil channel 21 to the second receiving groove 42. With this structure, since the lubricating medium flows between the first receiving groove 41 and the second receiving groove 42 through an oil passage notch 51 on the seal 50, and considering the high-frequency operation of the pump assembly, i.e., the large pumping volume, the size of the oil passage notch 51 is generally small. This limits the amount of lubricating medium that can pass through the oil passage notch 51. In this embodiment, the oil channel 21 can further increase the pathway for the lubricating medium to be transferred between the first receiving groove 41 and the second receiving groove 42. With the oil channel 21 cooperating with the movement of the rotating scroll 20, when the pump body assembly is operating at low frequency, i.e., the pumping oil volume is small, more of the lubricating medium in the first receiving groove 41 can enter the second receiving groove 42, thereby ensuring the lubrication effect on the sliding friction pair in the compression chamber.

[0084] Specifically, the oil channel 21 is an annular channel. This structural design is simple, efficient, and easy to install. Thus, when the moving scroll 20 is in its first active position, a portion of the annular channel is connected to the first receiving channel 41, and the other portion is connected to the second receiving channel 42; when the moving scroll 20 is in its second active position, a portion of the annular channel is connected to the second receiving channel 42, and the other portion is connected to the first receiving channel 41, thereby realizing the transfer of the lubricating medium from the first receiving channel 41 to the second receiving channel 42.

[0085] Specifically, the pump body assembly also includes a cross slip ring 70, which is disposed within the second receiving groove 42. The bracket 30 and the moving volute 20 are slidably connected to the cross slip ring 70. Specifically, the cross slip ring 70 has a first side and a second side arranged opposite to each other. The first side of the cross slip ring 70 is slidably connected to the bracket 30, and the cross slip ring 70 can slide relative to the bracket 30 along a first direction. The second side of the cross slip ring 70 is slidably connected to the moving volute 20, and the cross slip ring 70 can slide relative to the moving volute 20 along a second direction. The first and second directions are perpendicular to each other. With this structural arrangement, the moving volute 20 is prevented from rotating around its own axis by the cross slip ring 70; under the action of the cross slip ring 70, the moving volute 20 can only translate relative to the stationary volute 10.

[0086] Specifically, the stationary scroll 10 further includes a first sealing surface 12 and a second sealing surface 13. The first sealing surface 12 is used to contact and seal with the moving scroll 20. The second sealing surface 13 is used to contact and seal with the support 30. The stationary scroll 10 also includes a stationary scroll compression chamber 14, which is part of the compression chamber. The moving scroll 20 further includes a base plate sealing surface 22 and an outer support surface 23. The outer support surface 23 is used to contact the support 30 to support the moving scroll 20 through the support 30. The base plate sealing surface 22 is used to cooperate with the groove wall of the first receiving groove 41 to form a receiving oil cavity for storing lubricating medium. The moving scroll 20 also includes a bearing seat 25, at least a portion of which is inserted into the first receiving groove 41. Specifically, the moving scroll 20 is also provided with a cross slip ring groove 24, at least a portion of which is disposed in the cross slip ring groove 24, and the second side of the cross slip ring 70 is slidably connected to the cross slip ring groove 24.

[0087] like Figure 11 and Figure 12 As shown, in Embodiment 2 of the present invention, the oil conveying groove 21 includes a first oil conveying groove 211 and a second oil conveying groove 212 arranged at intervals. When the moving scroll 20 is in the first active position, one of the first oil conveying groove 211 and the second oil conveying groove 212 is connected to the first receiving groove 41, and the other of the first oil conveying groove 211 and the second oil conveying groove 212 is connected to the second receiving groove 42. When the moving scroll 20 is in the second active position, one of the first oil conveying groove 211 and the second oil conveying groove 212 is connected to the second receiving groove 42, and the other of the first oil conveying groove 211 and the second oil conveying groove 212 is connected to the first receiving groove 41. With this structural arrangement, the transfer of lubricating medium from the first receiving groove 41 to the second receiving groove 42 can be realized through the arrangement of the first oil conveying groove 211 and the second oil conveying groove 212.

[0088] Specifically, in order to improve the efficiency of the oil transport tank 21, the first oil transport tank 211 and the second oil transport tank 212 are arranged opposite to each other. The central angle between the first oil transport tank 211 and the second oil transport tank 212 is 180°.

[0089] like Figure 1 As shown, Embodiment 3 of the present invention provides a compressor, which includes a pump assembly, a main housing 1, and an oil sump 2 as provided in Embodiment 1 or Embodiment 2. The main housing 1 forms a receiving cavity, and the pump assembly is disposed within the receiving cavity. The oil sump 2 is disposed within the receiving cavity; the oil sump 2 is used to store lubricating medium.

[0090] The compressor provided in Embodiment 3 of the present invention can solve the technical problem of poor lubrication between the moving scroll and the stationary scroll in the prior art by configuring the first receiving tank 41 as a first segment 411 and a second segment 412 connected to each other. The first segment 411 is connected to the oil outlet of the oil sump 2, and the second segment 412 is connected to the compression chamber. At least a portion of the second segment 412 is set higher than the first segment 411, and the oil return inlet 311 of the oil return channel 31 is located on the wall of the portion of the second segment 412 that is higher than the first segment 411. This ensures that the lubricating medium entering the first receiving tank 41 from the oil sump 2 will not flow back to the oil sump 2 prematurely from the oil return channel 31, thereby guaranteeing the amount of lubricating medium flowing into the compression chamber from the second segment 412. Consequently, the moving scroll 20 can be lubricated even when the pumped oil is insufficient. Therefore, the compressor provided in this embodiment can solve the technical problem of poor lubrication between the moving scroll and the stationary scroll in the prior art.

[0091] Specifically, the compressor also includes a crankshaft 6, which is disposed inside the main housing 1 and is rotatably arranged relative to the main housing 1. An oil suction channel 61 is provided inside the crankshaft 6. The moving scroll 20 is connected to the crankshaft 6 through a shaft hole, and the first receiving groove 41 communicates with the oil suction channel 61.

[0092] Specifically, the compressor also includes an oil pump 5, which is installed inside the main housing 1. The oil sump 2 is connected to the oil suction channel 61 through the oil pump 5, so that the lubricating medium in the oil sump 2 can be pumped into the oil suction channel 61 through the oil pump 5.

[0093] Specifically, the compressor also includes a motor 3, which is disposed inside the main housing 1. The drive end of the motor 3 is connected to the middle of the crankshaft 6 to drive the crankshaft 6 to rotate inside the main housing 1, thereby driving the scroll 20 to rotate.

[0094] Specifically, the main housing 1 is also provided with a lower bracket 4, which is located below the bracket 30. The end of the crankshaft 6 near the oil sump 2 is inserted into the lower bracket 4 to limit the end of the crankshaft 6 near the oil sump 2, thereby further improving the stability of the crankshaft 6.

[0095] As can be seen from the above description, the above embodiments of the present invention achieve the following technical effects: The height of the oil return port of the oil sump in the upper support is increased, ensuring the supply of lubricating oil to the bottom of the moving plate during low-frequency operation. Simultaneously, it solves the problem of insufficient lubricating oil in the outer cavity of the high-pressure oil upper support during low-frequency operation, leading to wear on the bottom of the moving plate, the cross slip ring, and the upper support, thus enhancing low-frequency reliability. The scroll compressor can operate reliably across the entire frequency range, reducing the frictional power of the moving and stationary scrolls and improving reliability. Furthermore, the high-pressure oil groove of the scroll plate, which has poor machining economics, is eliminated, reducing the possibility of high-pressure lubricating oil leaking into the compression chamber and improving compressor performance.

[0096] 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.

[0097] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application. 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 drawings denote similar items; therefore, once an item is defined in one drawing, it need not be further discussed in subsequent drawings.

[0098] In the description of this application, 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 usually based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this application 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 application; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0099] 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.

[0100] 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 cannot be construed as limiting the scope of protection of this application.

[0101] 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 pump body assembly, characterized in that, include: A stationary volute (10) and a moving volute (20) are provided, and a compression cavity is formed between the stationary volute (10) and the moving volute (20); A bracket (30) is provided with an installation groove, and at least a portion of the moving scroll (20) is disposed in the installation groove; a first receiving groove (41) is provided on the groove wall of the installation groove, the first receiving groove (41) includes a first groove section (411) and a second groove section (412) connected to each other, the first groove section (411) is connected to the oil outlet of the oil sump (2) so that the lubricating medium in the oil sump (2) enters the first groove section (411); the second groove section (412) is used to communicate with the compression chamber; The bracket (30) is provided with an oil return channel (31) that communicates with the oil tank (2). The oil return inlet (311) of the oil return channel (31) is located at least part of the tank wall of the second tank section (412). At least part of the second tank section (412) is higher than the first tank section (411). The mounting groove has a second receiving groove (42) on its wall for communicating with the compression chamber; the second groove section (412) is used to communicate with the second receiving groove (42); wherein the second receiving groove (42) is intermittently connected with the compression chamber so that the pressure in the second receiving groove (42) is the same as the pressure in the compression chamber; The first receiving groove (41) is located between the support (30) and the moving scroll (20), the first groove segment (411) is located on the side of the second groove segment (412) away from the moving scroll (20), and the groove wall of the first groove segment (411) protrudes from the groove wall of the second groove segment (412) to form a stepped surface (32) between the first groove segment (411) and the second groove segment (412); wherein, the oil return inlet (311) is located at the stepped surface (32).

2. The pump body assembly according to claim 1, characterized in that, The volume of the first slot section (411) is greater than the volume of the second slot section (412); and / or, Along the arrangement direction from the support (30) to the moving scroll (20), the height of the first groove segment (411) is greater than the height of the second groove segment (412); and / or, The return oil inlet (311) is set higher than the return oil outlet of the return oil channel (31), and the return oil channel (31) is a bent channel.

3. The pump body assembly according to claim 1, characterized in that, The pump assembly also includes: A sealing element (50) is disposed in the first receiving groove (41) and located at the communication port where the first receiving groove (41) and the second receiving groove (42) communicate, so as to block the communication port; The seal (50) is provided with an oil passage notch (51) so that the lubricating medium in the first receiving groove (41) flows into the second receiving groove (42) through the oil passage notch (51).

4. The pump body assembly according to claim 3, characterized in that, The first receiving groove (41) and the second receiving groove (42) are both located between the support (30) and the moving scroll (20); Wherein, at least a portion of the bracket (30) and at least a portion of the moving scroll (20) are clearance-fitted to form an oil passage (60) for connecting the first receiving groove (41) and the second receiving groove (42); the seal (50) is disposed at the communication point between the oil passage (60) and the first receiving groove (41); and / or, The pump body assembly also includes an elastic element (80), which is disposed in the first receiving groove (41). One end of the elastic element (80) is connected to or abuts against the groove wall of the first receiving groove (41), and the other end of the elastic element (80) is connected to or abuts against the sealing element (50) so that the sealing element (50) abuts against the moving scroll (20).

5. The pump body assembly according to claim 1, characterized in that, At least a portion of the stationary volute (10) is connected to the bracket (30), and at least a portion of the stationary volute (10) is provided with a communicating oil groove (11) for communicating with the second receiving groove (42); the moving volute (20) is movably disposed to move to a first lubrication position that connects the compression chamber with the communicating oil groove (11) or a second lubrication position that connects the communicating oil groove (11) with the second receiving groove (42).

6. The pump body assembly according to claim 1, characterized in that, The moving scroll (20) is provided with an oil channel (21) on the side near the support (30), and the oil channel (21) is used to store the lubricating medium; the moving scroll (20) is movably arranged to move to a first movable position that connects the oil channel (21) with the first receiving groove (41) or a second movable position that connects the oil channel (21) with the second receiving groove (42).

7. The pump body assembly according to claim 6, characterized in that, The oil tank (21) is an annular tank; or, The oil transport trough (21) includes a first oil transport trough (211) and a second oil transport trough (212) arranged at intervals. When the moving vortex (20) is in the first active position, one of the first oil transport trough (211) and the second oil transport trough (212) is connected to the first receiving trough (41), and the other of the first oil transport trough (211) and the second oil transport trough (212) is connected to the second receiving trough (42). When the moving vortex (20) is in the second active position, one of the first oil transport trough (211) and the second oil transport trough (212) is connected to the second receiving trough (42), and the other of the first oil transport trough (211) and the second oil transport trough (212) is connected to the first receiving trough (41).

8. A compressor, characterized in that, include: Pump body assembly as claimed in any one of claims 1 to 7; The main housing (1) forms a receiving cavity, and the pump body assembly is disposed within the receiving cavity; An oil tank (2) is provided inside the receiving cavity; the oil tank (2) is used to store the lubricating medium.

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