compressor

Abstract

This invention provides a compressor, including a moving scroll, a stationary scroll, and a backflow preventer. A compression chamber is located between the moving and stationary scrolls. A high-pressure chamber is located on the side of the stationary scroll facing away from the moving scroll, and a back-pressure chamber is located on the side of the moving scroll facing away from the stationary scroll. A pressure supply channel is located within the stationary scroll, and the moving scroll has a connecting channel. One end of the connecting channel is connected to the back-pressure chamber. One end of the pressure supply channel is connected to the high-pressure chamber, and the other end is intermittently connected to the connecting channel. When the connecting channel is connected to the pressure supply channel, the pressure supply channel transports fluid from the high-pressure chamber to the connecting channel, and then to the back-pressure chamber, providing pressure to the back-pressure chamber. When the connecting channel is connected to the compression chamber, the pressure in the compression chamber is greater than the pressure in the back-pressure chamber, and the compression chamber provides pressure to the back-pressure chamber. When the pressure in the compression chamber is less than the pressure in the back-pressure chamber, the backflow preventer prevents fluid in the back-pressure chamber from flowing back into the compression chamber, thus avoiding increased power consumption.

Description

Technical Field

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

[0002] When a scroll compressor is subjected to axial gas force, the moving and stationary scrolls will separate axially, resulting in an increase in axial clearance and leakage. In severe cases, this will prevent the establishment of normal pressure differential, meaning that the compressor cannot operate normally.

[0003] In existing technologies, a back pressure is set on the back of the moving disc to provide axial force to resist the axial gas force, achieving compression between the moving and stationary scrolls. This reduces the difficulty of controlling the machining fit and assembly dimensional chain of various parts. For example, patent publication number CN202120839137.1 uses a pressure supply channel to provide pressure from the intermediate compression chamber or exhaust chamber to the back pressure zone, forming a back pressure to balance the axial gas force. However, the pressure in the intermediate compression chamber is not a constant value within a certain compression angle range, but a variable value. At a certain angle range, the pressure in the intermediate compression chamber will be lower than that in the back pressure chamber, causing back pressure to flow back into the compression chamber. When the pressure in the compression chamber is higher than that in the back pressure chamber within a certain angle range, pressure is supplied to the back pressure chamber area, which is the normal pressure supply connection state.

[0004] The backflow of fluid from the back pressure chamber to the compression chamber causes repeated compression, resulting in high power consumption. Therefore, a compressor that can prevent the backflow of fluid from the back pressure chamber is needed. Summary of the Invention

[0005] This invention provides a compressor to solve the problem of increased power consumption caused by fluid backflow from the back pressure chamber to the compression chamber in the prior art.

[0006] To address the aforementioned problems, this invention provides a compressor comprising a moving scroll, a stationary scroll, and a backflow preventer. A compression chamber is located between the moving and stationary scrolls. A high-pressure chamber is located on the side of the stationary scroll facing away from the moving scroll, and a back-pressure chamber is located on the side of the moving scroll facing away from the stationary scroll. A pressure supply channel is located within the stationary scroll, communicating with the high-pressure chamber. The moving scroll has a connecting channel, one end of which is connected to the back-pressure chamber. During the rotation of the moving scroll, the other end of the connecting channel alternately communicates with the compression chamber and the pressure supply channel. The backflow preventer is located at the outlet of the connecting channel and is used to prevent fluid in the back-pressure chamber from flowing back into the connecting channel.

[0007] Furthermore, the backflow preventer includes a limiting member and a valve plate. The limiting member is fixed on the moving scroll, a part of the valve plate is fixed on the moving scroll, and the other part of the valve plate is a movable end that covers the outlet of the connecting channel. The limiting member has a limiting slope, which is spaced apart from the outlet of the connecting channel. The limiting slope is used to limit the valve plate, and the valve plate is used to prevent the fluid in the back pressure chamber from flowing back to the connecting channel.

[0008] Furthermore, the valve plate includes a valve ring and an elastic plate. The valve ring is fixed around the outlet of the communication channel. One end of the elastic plate is fixedly connected to the inner ring of the valve ring, and the other end of the elastic plate covers the outlet of the communication channel. The elastic plate is used to prevent the fluid in the back pressure chamber from flowing back into the communication channel.

[0009] Furthermore, the moving scroll has a mounting hole, and the limiting member is a columnar structure, with the outer wall of the limiting member connected to the inner wall of the mounting hole.

[0010] Furthermore, the limiting member and the mounting hole are threaded or interference-fitted. The end of the limiting member facing the back pressure chamber has a recessed cavity with a cross groove on the bottom wall. The limiting member presses a part of the valve plate against the bottom wall of the mounting hole.

[0011] Furthermore, the limiting component has a fluid channel, and when the valve plate is open, the fluid channel will connect the connecting channel with the back pressure chamber.

[0012] Furthermore, the fluid channel includes multiple first flow channels that pass through the limiting member and are used to transport fluid from the connecting channel to the back pressure chamber.

[0013] Furthermore, the compressor also includes a bearing, and the end of the moving scroll away from the stationary scroll has a mounting cavity. The bearing is located in the mounting cavity, which is connected to the back pressure cavity. The moving scroll also has a flow channel, and the two ends of the flow channel are connected to the fluid channel and the mounting cavity, respectively.

[0014] Furthermore, the fluid channel includes a grooved cavity located on the outer wall of the limiting member, which connects the connecting channel and the drainage channel.

[0015] Furthermore, the fluid channel includes a second flow channel and a third flow channel that are interconnected. Both the second and third flow channels are located within the limiting member and have an included angle. The third flow channel is connected to the diversion channel. When the valve plate is open, the connecting channel and the second flow channel are connected.

[0016] Furthermore, the bottom of the high-pressure chamber is an oil collection area, which is used to collect a portion of the lubricating oil in the fluid discharged from the exhaust port of the compression chamber. The pressure supply channel includes a first section, a second section, and a third section connected in sequence. There is an angle between the first section and the second section, and an angle between the second section and the third section. The first section is connected to the oil collection area, and the third section is intermittently connected to the connecting channel.

[0017] Furthermore, the stationary vortex disk includes a stationary disk substrate and stationary disk teeth that are connected to each other. The first and second segments are both located on the stationary disk substrate, and the third segment is located on the stationary disk teeth. The first and third segments extend along the axial direction of the stationary disk, and the second segment extends along the radial direction of the stationary disk.

[0018] Furthermore, the compressor also includes a multi-stage oil separator, which is connected to the stationary scroll plate and connected to the compressor's exhaust port. The multi-stage oil separator is used to separate oil and gas in the fluid discharged from the exhaust port, and the oil outlet at the bottom of the multi-stage oil separator is connected to the oil collection area.

[0019] Furthermore, the compressor also has a high-pressure oil zone, which is located below the oil collection zone. The high-pressure oil zone is used to collect a portion of the lubricating oil in the fluid discharged from the exhaust port. The pressure supply channel also includes a fourth section, the two ends of which are connected to the second section and the high-pressure oil zone, respectively.

[0020] Furthermore, the compressor also includes a housing and a high-low pressure separator. The moving scroll, the stationary scroll, and the high-low pressure separator are all located inside the housing. The high-low pressure separator is located on the side of the stationary scroll away from the moving scroll. The bottom of the high-low pressure separator and the inner wall of the housing form a high-pressure oil zone. The high-low pressure separator has a return channel, and the fourth section is connected to the high-pressure oil zone through the return channel.

[0021] Furthermore, the compressor also includes a high-pressure oil zone located below the high-pressure chamber. The compressor also includes a return channel that connects the high-pressure oil zone with the pressure supply channel. When the backflow preventer is closed and / or the pressure supply channel is not connected to the connecting channel, the fluid in the high-pressure chamber enters the high-pressure oil zone through the return channel.

[0022] Furthermore, the compressor also includes a housing and a bracket. The moving scroll and the stationary scroll are both located inside the housing. The bracket is connected to the housing. The bottom of the inner cavity of the housing has a high-pressure oil zone. There is a back pressure cavity between the bracket and the moving scroll. The inner wall of the housing has a first oil supply channel, and the inner wall of the bracket has a second oil supply channel. The high-pressure oil zone, the first oil supply channel, the second oil supply channel, and the back pressure cavity are connected in sequence.

[0023] This invention provides a compressor comprising a moving scroll, a stationary scroll, and a backflow preventer. A compression chamber is located between the moving and stationary scrolls. A high-pressure chamber is located on the side of the stationary scroll facing away from the moving scroll, and a back-pressure chamber is located on the side of the moving scroll facing away from the stationary scroll. A pressure supply channel is located within the stationary scroll and communicates with the high-pressure chamber. The moving scroll has a connecting channel, one end of which communicates with the back-pressure chamber. During the rotation of the moving scroll, the other end of the connecting channel alternately communicates with the compression chamber and the pressure supply channel. The backflow preventer is located at the outlet of the connecting channel and prevents fluid in the back-pressure chamber from flowing back into the connecting channel. In this design, one end of the pressure supply channel communicates with the high-pressure chamber, and the other end is intermittently communicated with the connecting channel. When the connecting channel communicates with the pressure supply channel, the pressure supply channel transports fluid from the high-pressure chamber to the connecting channel, and then to the back-pressure chamber, providing pressure to the back-pressure chamber. When the connecting channel communicates with the compression chamber, the pressure in the compression chamber is greater than the pressure in the back-pressure chamber, and the compression chamber provides pressure to the back-pressure chamber. When the pressure in the compression chamber is lower than the pressure in the back pressure chamber, the anti-backflow device is used to prevent the fluid in the back pressure chamber from flowing back into the compression chamber, thus avoiding an increase in power consumption. Attached Figure Description

[0024] 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:

[0025] Figure 1 A schematic diagram of the compressor provided in Embodiment 1 of the present invention is shown;

[0026] Figure 2 A schematic diagram of the backflow preventer provided in Embodiment 1 of the present invention is shown;

[0027] Figure 3 A schematic diagram of the anti-backflow device provided in Embodiment 2 of the present invention is shown;

[0028] Figure 4 It shows Figure 3 A schematic diagram of the limiting component in the middle;

[0029] Figure 5 It shows Figure 3 A schematic diagram of the split structure of the anti-backflow device in the middle;

[0030] Figure 6 It shows Figure 5 Sectional view at point AA;

[0031] Figure 7 It shows Figure 5 Sectional view at point BB;

[0032] Figure 8 A schematic diagram of the pressure supply channel of the compressor of the present invention is shown;

[0033] Figure 9 A schematic diagram of the anti-backflow device and pressure supply channel provided in Embodiment 3 of the present invention is shown;

[0034] Figure 10 It shows Figure 9 A magnified view of a section at point G in the middle;

[0035] Figure 11 It shows Figure 9 A schematic diagram of the anti-backflow device in the diagram.

[0036] The above figures include the following reference numerals:

[0037] 10. Moving scroll plate; 11. Connecting channel; 12. Mounting hole;

[0038] 20. Static vortex disk;

[0039] 21. Pressure supply channel; 211. First section; 212. Second section; 213. Third section; 214. Fourth section;

[0040] 22. Static disk substrate; 23. Static disk teeth;

[0041] 30. Anti-backflow device; 31. Limiting component; 311. Limiting ramp;

[0042] 312, recessed cavity; 3122, cross groove;

[0043] 313. Fluid channels;

[0044] 3131, First flow channel; 3132, Drainage channel; 3133, Groove cavity; 3134, Second flow channel; 3135, Third flow channel;

[0045] 32. Valve plate; 321. Valve ring; 322. Elastic plate;

[0046] 41. Compression chamber; 42. High-pressure chamber; 421. Oil collecting area;

[0047] 43. Back pressure chamber; 44. Bearing; 45. Mounting chamber;

[0048] 46. ​​Multistage oil separator; 47. High and low pressure separator; 471. Return channel; 48. High-pressure oil zone;

[0049] 51. Outer casing; 52. Bracket; 521. First oil supply channel; 522. Second oil supply channel. Detailed Implementation

[0050] 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. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0051] like Figures 1 to 2 As shown, Embodiment 1 of the present invention provides a compressor, including a moving scroll 10, a stationary scroll 20, and a backflow preventer 30. A compression chamber 41 is provided between the moving scroll 10 and the stationary scroll 20. A high-pressure chamber 42 is provided on the side of the stationary scroll 20 away from the moving scroll 10, and a back-pressure chamber 43 is provided on the side of the moving scroll 10 away from the stationary scroll 20. A pressure supply channel 21 is provided in the stationary scroll 20, and the pressure supply channel 21 is connected to the high-pressure chamber 42. The moving scroll 10 has a connecting channel 11, one end of which is connected to the back-pressure chamber 43. During the rotation of the moving scroll 10, the other end of the connecting channel 11 is alternately connected to the compression chamber 41 and the pressure supply channel 21. The backflow preventer 30 is provided at the outlet of the connecting channel 11 and is used to prevent the fluid in the back-pressure chamber 43 from flowing back to the connecting channel 11.

[0052] In this scheme, one end of the pressure supply channel 21 is connected to the high-pressure chamber 42, and the other end is intermittently connected to the connecting channel 11. When the connecting channel 11 is connected to the pressure supply channel 21, the pressure supply channel 21 transports the fluid from the high-pressure chamber 42 to the connecting channel 11, and then to the back pressure chamber 43, providing pressure to the back pressure chamber 43. When the connecting channel 11 is connected to the compression chamber 41, the pressure in the compression chamber 41 is greater than the pressure in the back pressure chamber 43, and the compression chamber 41 provides pressure to the back pressure chamber 43. When the pressure in the compression chamber 41 is less than the pressure in the back pressure chamber 43, the anti-backflow device 30 is used to prevent the fluid in the back pressure chamber 43 from flowing back to the compression chamber 41, thus avoiding an increase in power consumption.

[0053] like Figure 2 As shown, the backflow preventer 30 includes a limiting member 31 and a valve plate 32. The limiting member 31 is fixed on the moving scroll 10, and a part of the valve plate 32 is fixed on the moving scroll 10. The other part of the valve plate 32 is a movable end that covers the outlet of the connecting channel 11. The limiting member 31 has a limiting slope 311, which is spaced apart from the outlet of the connecting channel 11. The limiting slope 311 is used to limit the valve plate 32, and the valve plate 32 is used to prevent the fluid in the back pressure chamber 43 from flowing back to the connecting channel 11.

[0054] In this configuration, a portion of the valve plate 32 is fixed to the moving scroll 10, while the other portion is a movable end that covers the outlet of the connecting channel 11. Fluid in the connecting channel 11 forces its way through the movable end of the valve plate 32 into the back pressure chamber 43. The limiting inclined surface 311 stops and limits the valve plate 32, preventing damage. When the fluid pressure in the back pressure chamber 43 exceeds the pressure in the compression chamber 41, the valve plate prevents the fluid in the back pressure chamber 43 from flowing back. In Embodiment 1, the limiting member 31 is plate-shaped, and the limiting member 31 and the valve plate 32 are fixed to the moving scroll 10 by the same screw or rivet.

[0055] like Figures 3 to 7 As shown, Embodiment 2 of the present invention provides a limiting component. The valve plate 32 includes a valve ring 321 and an elastic plate 322. The valve ring 321 is fixed around the outlet of the communication channel 11. One end of the elastic plate 322 is fixedly connected to the inner ring of the valve ring 321, and the other end of the elastic plate 322 covers the outlet of the communication channel 11. The elastic plate 322 is used to prevent the fluid in the back pressure chamber 43 from flowing back to the communication channel 11.

[0056] With this configuration, the valve ring 321 is fixed around the outlet of the connecting channel 11, one end of the elastic plate 322 is fixedly connected to the inner ring of the valve ring 321, and the other end of the elastic plate 322 is movable and covers the outlet of the connecting channel 11. The fluid in the connecting channel 11 pushes open the elastic plate 322 and enters the back pressure chamber 43. When the fluid pressure in the back pressure chamber 43 is greater than the pressure in the compression chamber 41, the elastic plate 322 prevents the fluid in the back pressure chamber 43 from flowing back to the connecting channel 11.

[0057] like Figure 3 As shown, the moving scroll 10 has a mounting hole 12, and the limiting member 31 is a columnar structure. The outer wall of the limiting member 31 is connected to the inner wall of the mounting hole 12.

[0058] With this configuration, the moving scroll 10 has mounting holes 12, into which the limiting member 31 is installed and fixed. The limiting member 31 has a columnar structure, which is easy to process and saves costs.

[0059] like Figure 4 As shown, the limiting member 31 and the mounting hole 12 are threaded or interference-fitted. The end of the limiting member 31 facing the back pressure cavity 43 has a recessed cavity 312. The bottom wall of the recessed cavity 312 has a cross groove 3122. The limiting member 31 presses a part of the valve plate 32 against the bottom wall of the mounting hole 12.

[0060] With this configuration, the limiting member 31 and the mounting hole 12 are fixed together by a threaded connection or interference fit, resulting in a more secure fixation and preventing them from falling off under fluid impact. A recessed cavity 312 is provided at the end of the limiting member 31 facing the back pressure chamber 43. The recessed cavity 312 can accommodate fluid passing through the limiting member 31, preventing damage caused by excessive impact. The bottom wall of the recessed cavity 312 has a cross groove 3122, which can accommodate installation tools, facilitating the installation of the limiting member 31. The limiting member 31 presses a portion of the valve plate 32 against the bottom wall of the mounting hole 12 without introducing other limiting components, making installation convenient.

[0061] like Figure 5 As shown, the limiting member 31 has a fluid channel 313. When the valve plate 32 is open, the fluid channel 313 connects the connecting channel 11 with the back pressure chamber 43.

[0062] With this configuration, when valve plate 32 is open, fluid channel 313 delivers fluid from connecting channel 11 to back pressure chamber 43. When valve plate 32 is closed, fluid channel 313 and back pressure chamber 43 are disconnected.

[0063] like Figures 6 to 7 As shown, the fluid channel 313 includes a plurality of first flow channels 3131, the first flow channels 3131 penetrate the limiting member 31, and the first flow channels 3131 are used to transport the fluid in the connecting channel 11 to the back pressure chamber 43.

[0064] With this configuration, the fluid channel 313 includes multiple first flow channels 3131, which pass through the limiting member 31 to connect the connecting channel 11 and the back pressure chamber 43, thereby transporting the fluid in the connecting channel 11 to the back pressure chamber 43.

[0065] like Figures 9 to 11 As shown, Embodiment 3 of the present invention provides a compressor. The difference between Embodiment 3 and Embodiment 1 is that the compressor further includes a bearing 44, and the end of the moving scroll 10 away from the stationary scroll 20 has a mounting cavity 45. The bearing 44 is located in the mounting cavity 45, and the mounting cavity 45 is connected to the back pressure cavity 43. The moving scroll 10 also has a flow channel 3132, and the two ends of the flow channel 3132 are connected to the fluid channel 313 and the mounting cavity 45, respectively.

[0066] With this configuration, the flow channel 3132 on the moving scroll 10 delivers the fluid in the fluid channel 313 to the mounting cavity 45, allowing the fluid to lubricate the bearing 44. The fluid that lubricates the bearing 44 then enters the back pressure cavity 43, providing pressure to the back pressure cavity 43.

[0067] like Figure 10 As shown, the fluid channel 313 includes a grooved cavity 3133, which is located on the outer side wall of the limiting member 31. The grooved cavity 3133 connects the connecting channel 11 and the drainage channel 3132.

[0068] With this configuration, the grooving cavity 3133 is located on the outer side wall of the limiting member 31. The grooving cavity 3133 connects the connecting channel 11 and the drainage channel 3132. The fluid in the connecting channel 11 enters the grooving cavity 3133 and then enters the drainage channel 3132.

[0069] like Figures 9 to 11 As shown, the fluid channel 313 includes a second flow channel 3134 and a third flow channel 3135 that are interconnected. Both the second flow channel 3134 and the third flow channel 3135 are located within the limiting member 31. There is an angle between the second flow channel 3134 and the third flow channel 3135. The third flow channel 3135 is connected to the diversion channel 3132. When the valve plate 32 is open, the connecting channel 11 and the second flow channel 3134 are connected.

[0070] In this configuration, the fluid channel 313 includes a second flow channel 3134 and a third flow channel 3135 that are interconnected. The two ends of the second flow channel 3134 are connected to the connecting channel 11 and the third flow channel 3135, respectively, conveying the fluid in the connecting channel 11 to the third flow channel 3135. The third flow channel 3135 is connected to the drainage channel 3132 via a slotted cavity 3133. The third flow channel 3135 conveys the fluid in the second flow channel 3134 to the drainage channel 3132. An angle exists between the second flow channel 3134 and the third flow channel 3135, redirecting the fluid so that it can enter the mounting cavity 45 after being conveyed.

[0071] like Figure 1 and Figure 8 As shown, Embodiment 1 of the present invention provides a compressor. The bottom of the high-pressure chamber 42 is an oil collection area 421, which is used to collect a portion of the lubricating oil in the fluid discharged from the exhaust port of the compression chamber 41. The pressure supply channel 21 includes a first section 211, a second section 212, and a third section 213 connected in sequence. There is an angle between the first section 211 and the second section 212, and an angle between the second section 212 and the third section 213. The first section 211 is connected to the oil collection area 421, and the third section 213 is intermittently connected to the connecting channel 11.

[0072] With this configuration, the first section 211 and the second section 212 have an angle, and the second section 212 and the third section 213 have an angle, so that the fluid in the oil collection area 421 can change direction multiple times in the pressure supply channel 21 and finally enter the connecting channel 11. This adapts to the internal structure of the compressor and delivers the fluid to the connecting channel 11, ensuring the performance of the compressor.

[0073] like Figure 8As shown, the stationary vortex disk 20 includes a stationary disk substrate 22 and a stationary disk tooth 23 connected to each other. The first segment 211 and the second segment 212 are both located on the stationary disk substrate 22, and the third segment 213 is located on the stationary disk tooth 23. The first segment 211 and the third segment 213 extend along the axial direction of the stationary vortex disk 20, and the second segment 212 extends along the radial direction of the stationary vortex disk 20.

[0074] With this configuration, the first segment 211 and the second segment 212 are both located on the stationary disk substrate 22, and the third segment 213 is located on the stationary disk teeth 23. The stationary disk teeth 23 are in contact with the moving scroll 10, and the third segment 213 can be tightly connected to the connecting channel 11, thus transporting the fluid in the third segment 213 to the connecting channel 11. The first segment 211 and the third segment 213 extend along the axial direction of the stationary scroll 20, and the second segment 212 extends along the radial direction of the stationary scroll 20, thereby enabling the fluid to be redirected within the stationary scroll 20.

[0075] like Figure 1 As shown, the compressor also includes a multi-stage oil separator 46, which is connected to the stationary scroll plate 20 and is connected to the compressor's exhaust port. The multi-stage oil separator 46 is used to separate oil and gas in the fluid discharged from the exhaust port. The oil outlet at the bottom of the multi-stage oil separator 46 is connected to the oil collection area 421.

[0076] With this configuration, the multi-stage oil separator 46 is connected to the stationary vortex plate 20. The multi-stage oil separator 46 separates the fluid discharged from the exhaust port of the stationary vortex plate 20 into oil and gas, and the separated oil is collected in the oil collection area 421.

[0077] like Figure 1 As shown, the compressor also has a high-pressure oil zone 48, which is located below the oil collection zone 421. The high-pressure oil zone 48 is used to collect a portion of the lubricating oil in the fluid discharged from the exhaust port. The pressure supply channel 21 also includes a fourth section 214, the two ends of which are connected to the second section 212 and the high-pressure oil zone 48, respectively.

[0078] With this configuration, the fluid in the second section 212 can enter the high-pressure oil zone 48 through the fourth section 214, and the fluid in the high-pressure oil zone 48 can enter the second section 212 through the fourth section 214, thereby entering the back pressure chamber 43.

[0079] like Figure 1 As shown, the compressor also includes a housing 51 and a high-low pressure separator 47. The moving scroll 10, the stationary scroll 20, and the high-low pressure separator 47 are all located inside the housing 51. The high-low pressure separator 47 is located on the side of the stationary scroll 20 away from the moving scroll 10. The bottom of the high-low pressure separator 47 and the inner wall of the housing 51 form a high-pressure oil zone 48. The high-low pressure separator 47 has a return channel 471. The fourth section 214 is connected to the high-pressure oil zone 48 through the return channel 471.

[0080] With this configuration, the high-low pressure separator 47 is located on the side of the stationary scroll 20 away from the moving scroll 10. The high-low pressure separator 47 and the outer casing 51 form a high-pressure oil zone 48. The high-low pressure separator 47 has a return channel 471 that connects the fourth section 214 with the high-pressure oil zone 48, allowing the fluid in the fourth section 214 and the high-pressure oil zone 48 to circulate with each other.

[0081] like Figure 1 As shown, the compressor also includes a high-pressure oil zone 48, which is located below the high-pressure chamber 42. The compressor also includes a return channel 471, which connects the high-pressure oil zone 48 with the pressure supply channel 21. When the anti-return device 30 is closed and / or the pressure supply channel 21 is not connected to the connecting channel 11, the fluid in the high-pressure chamber 42 enters the high-pressure oil zone 48 through the return channel 471.

[0082] With this configuration, when the pressure in the back pressure chamber 43 is greater than the pressure in the compression chamber 41, it prevents the return flow device 30 from closing. At this time, the fluid in the high-pressure chamber 42 enters the second section 212 and then flows to the high-pressure oil zone 48 through the fourth section 214. When the pressure supply channel 21 is not connected to the connecting channel 11, the fluid in the high-pressure chamber 42 enters the second section 212 and then flows to the high-pressure oil zone 48 through the fourth section 214.

[0083] like Figure 1 As shown, the compressor also includes a housing 51 and a bracket 52. The moving scroll 10 and the stationary scroll 20 are both disposed inside the housing 51. The bracket 52 is connected to the housing 51. The bottom of the inner cavity of the housing 51 has a high-pressure oil zone 48. There is a back pressure chamber 43 between the bracket 52 and the moving scroll 10. The inner wall of the housing 51 has a first oil supply channel 521, and the inner wall of the bracket 52 has a second oil supply channel 522. The high-pressure oil zone 48, the first oil supply channel 521, the second oil supply channel 522 and the back pressure chamber 43 are connected in sequence.

[0084] With this configuration, the inner wall of the outer casing 51 has a first oil supply channel 521, and the inner wall of the bracket 52 has a second oil supply channel 522. The first oil supply channel 521 and the second oil supply channel 522 transport the fluid in the high-pressure oil zone 48 to the back pressure chamber 43. Since the pressure provided by the single-channel fluid transport is relatively small and the speed is relatively slow, oil is supplied to the back pressure chamber 43 through the pressure supply channel 21 and the first oil supply channel 521 and the second oil supply channel 522, so that there is sufficient pressure and lubricating oil in the back pressure chamber 43.

[0085] 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.

[0086] 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.

[0087] 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.

[0088] 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.

[0089] 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.

[0090] 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.

Claims

1. A compressor characterized by, The application relates to a compressor comprising a moving scroll (10), a stationary scroll (20) and a backflow preventing device (30), wherein the moving scroll (10) and the stationary scroll (20) have a compression chamber (41) therebetween, the side of the stationary scroll (20) away from the moving scroll (10) has a high-pressure chamber (42), the side of the moving scroll (10) away from the stationary scroll (20) has a back-pressure chamber (43), the stationary scroll (20) has a pressure supply channel (21) therein, the pressure supply channel (21) is communicated with the high-pressure chamber (42), the moving scroll (10) has a communication channel (11), one end of the communication channel (11) is communicated with the back-pressure chamber (43), and the other end of the communication channel (11) is alternately communicated with the compression chamber (41) and the pressure supply channel (21) during rotation of the moving scroll (10); the backflow preventing device (30) is arranged at the outlet of the communication channel (11), and is used for preventing the fluid in the back-pressure chamber (43) from flowing back to the communication channel (11).

2. The compressor of claim 1, wherein, The backflow preventing device (30) comprises a limiting member (31) and a valve piece (32), the limiting member (31) is fixed on the moving scroll (10), one part of the valve piece (32) is fixed on the moving scroll (10), the other part of the valve piece (32) is a movable end and covers the outlet of the communication channel (11), the limiting member (31) has a limiting inclined surface (311), the limiting inclined surface (311) is arranged in a spaced manner with the outlet of the communication channel (11), the limiting inclined surface (311) is used for limiting the valve piece (32), and the valve piece (32) is used for preventing the fluid in the back-pressure chamber (43) from flowing back to the communication channel (11).

3. The compressor of claim 2, wherein, The valve piece (32) comprises a valve ring (321) and an elastic piece (322), the valve ring (321) is fixed around the outlet of the communication channel (11), one end of the elastic piece (322) is fixedly connected with the inner ring of the valve ring (321), the other end of the elastic piece (322) covers the outlet of the communication channel (11), and the elastic piece (322) is used for preventing the fluid in the back-pressure chamber (43) from flowing back to the communication channel (11).

4. The compressor of claim 2, wherein, The moving scroll (10) has a mounting hole (12), the limiting member (31) is in a columnar structure, and the outer side wall of the limiting member (31) is connected with the inner wall of the mounting hole (12).

5. The compressor of claim 4, wherein, The limiting member (31) and the mounting hole (12) are screw-connected or interference-fitted, one end of the limiting member (31) towards the back-pressure chamber (43) is provided with a sunken chamber (312), the bottom wall of the sunken chamber (312) is provided with a cross groove (3122), and the limiting member (31) presses one part of the valve piece (32) against the bottom wall of the mounting hole (12).

6. The compressor of claim 4, wherein, The limiting member (31) has a fluid channel (313), and the fluid channel (313) communicates the communication channel (11) with the back-pressure chamber (43) when the valve piece (32) is opened.

7. The compressor of claim 6, wherein, The fluid passage (313) comprises a plurality of first flow channels (3131) penetrating through the limiting member (31), and the first flow channels (3131) are used for conveying the fluid in the communication passage (11) to the back pressure cavity (43).

8. The compressor of claim 6, wherein, The compressor further comprises a bearing (44), one end of the orbiting scroll (10) away from the fixed scroll (20) has a mounting cavity (45), the bearing (44) is located in the mounting cavity (45), the mounting cavity (45) and the back pressure cavity (43) are communicated, and the orbiting scroll (10) further has a flow guide passage (3132), two ends of the flow guide passage (3132) are communicated with the fluid passage (313) and the mounting cavity (45) respectively.

9. The compressor of claim 8, wherein, The fluid passage (313) comprises a groove cavity (3133) located on the outer side wall of the limiting member (31), and the groove cavity (3133) communicates the communication passage (11) and the flow guide passage (3132).

10. The compressor of claim 8, wherein, The fluid passage (313) comprises a second flow channel (3134) and a third flow channel (3135) communicated with each other, the second flow channel (3134) and the third flow channel (3135) are both located in the limiting member (31), the second flow channel (3134) and the third flow channel (3135) have an included angle therebetween, and the third flow channel (3135) is communicated with the flow guide passage (3132); when the valve plate (32) is opened, the communication passage (11) is communicated with the second flow channel (3134).

11. The compressor of claim 1, wherein, The bottom of the high pressure cavity (42) is an oil collection area (421) used for collecting part of the lubricating oil from the exhaust port of the compression cavity (41), the pressure supply flow channel (21) comprises a first section (211), a second section (212) and a third section (213) communicated in sequence, the first section (211) and the second section (212) have an included angle therebetween, and the second section (212) and the third section (213) have an included angle therebetween; wherein the first section (211) is communicated with the oil collection area (421), and the third section (213) is intermittently communicated with the communication passage (11).

12. The compressor of claim 11, wherein, The fixed scroll (20) comprises a fixed scroll base plate (22) and a fixed scroll tooth (23) connected with each other, the first section (211) and the second section (212) are both located on the fixed scroll base plate (22), and the third section (213) is located on the fixed scroll tooth (23); wherein the first section (211) and the third section (213) extend along the axial direction of the fixed scroll (20), and the second section (212) extends along the radial direction of the fixed scroll (20).

13. The compressor of claim 11, wherein, The compressor further comprises a multi-stage oil separator (46) connected with the static scroll (20), the multi-stage oil separator (46) and the exhaust port of the compressor are communicated, the multi-stage oil separator (46) is used for separating oil and gas of the fluid discharged from the exhaust port, and an oil outlet at the bottom of the multi-stage oil separator (46) is communicated with the oil collection area (421).

14. The compressor of claim 11, wherein, The compressor further comprises a high-pressure oil area (48) located below the oil collection area (421), the high-pressure oil area (48) is used for collecting part of the lubricating oil from the fluid discharged from the exhaust port; and the pressure supply flow channel (21) further comprises a fourth section (214) communicated with the second section (212) and the high-pressure oil area (48) at two ends thereof.

15. The compressor of claim 14, wherein, The compressor further comprises a housing (51) and a high-low pressure separator (47), the dynamic scroll (10), the static scroll (20) and the high-low pressure separator (47) are located in the housing (51), and the high-low pressure separator (47) is located on the side of the static scroll (20) away from the dynamic scroll (10); wherein the bottom of the high-low pressure separator (47) and the inner wall of the housing (51) surround the high-pressure oil area (48), the high-low pressure separator (47) has a backflow channel (471), and the fourth section (214) is communicated with the high-pressure oil area (48) through the backflow channel (471).

16. The compressor of claim 1, wherein, The compressor further comprises a high-pressure oil area (48) located below the high-pressure cavity (42), and a backflow channel (471) communicating the high-pressure oil area (48) with the pressure supply flow channel (21), when the backflow preventing device (30) is closed and / or the pressure supply flow channel (21) is not communicated with the communication channel (11), the fluid in the high-pressure cavity (42) enters the high-pressure oil area (48) through the backflow channel (471).

17. The compressor of claim 1, wherein, The compressor further comprises a housing (51) and a support (52), the dynamic scroll (10) and the static scroll (20) are arranged in the housing (51), the support (52) is connected with the housing (51), the bottom of the inner cavity of the housing (51) has a high-pressure oil area (48), the support (52) and the dynamic scroll (10) have the back pressure cavity (43), the inner wall of the housing (51) has a first oil supply flow channel (521), and the inner wall of the support (52) has a second oil supply flow channel (522); wherein the high-pressure oil area (48), the first oil supply flow channel (521), the second oil supply flow channel (522) and the back pressure cavity (43) are communicated in sequence.

Images