Heat pump scroll compressor and vehicle

Abstract

The application discloses a heat pump scroll compressor and a vehicle, which comprise a shell, a moving scroll disc, a static scroll disc and a driving mechanism, the shell has a cavity, the cavity comprises a low-pressure cavity and a high-pressure cavity; the moving scroll disc is movably arranged in the cavity; the static scroll disc is fixedly arranged in the cavity, and one side of the static scroll disc facing the moving scroll disc is provided with static scroll teeth; wherein, a first suction cavity is formed between the inlet end of the moving scroll tooth far away from the center of the moving scroll disc and the static scroll tooth, and a second suction cavity is formed between the inlet end of the static scroll tooth far away from the center of the static scroll disc and the moving scroll tooth; an oil return channel is further arranged on the static scroll disc, the oil return channel comprises an oil inlet and at least a first oil outlet and a second oil outlet, all of which are in communication with the oil inlet, the oil inlet is in communication with the high-pressure cavity, and the first oil outlet and the second oil outlet are respectively in communication with the first suction cavity and the second suction cavity. Through the above scheme, the internal structure of the compressor is fully lubricated, and the oil return channel structure is simple and has low processing difficulty.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of compressors, in particular to a heat pump scroll compressor and a vehicle. BACKGROUND

[0002] During the operation of the heat pump compressor, the refrigeration oil plays a crucial role in the performance and service life of the compressor. On the one hand, the refrigeration oil plays a role in heat conduction, reducing friction, reducing wear and tear, and reducing noise. On the other hand, the oil film formed by the refrigeration oil at the interface between different compression chambers separates the gas at different pressures and plays a role in radial sealing.

[0003] Therefore, in order to ensure the performance and service life of the existing heat pump compressor, an oil return channel is provided in the compressor to return the refrigeration oil from the high-pressure chamber to the low-pressure chamber. However, the existing oil return channel structure is complex, difficult to process, and the refrigeration oil is not evenly distributed in the compressor, which cannot guarantee the full lubrication of the internal structure. SUMMARY

[0004] The technical problem solved by the present application is to provide a heat pump scroll compressor that fully lubricates the internal structure of the compressor and has a simple oil return channel structure and low processing difficulty.

[0005] To solve the above technical problems, one technical solution adopted by the present application is to provide a heat pump scroll compressor, comprising a shell, a moving scroll, a stationary scroll and a driving mechanism, the shell having a cavity; the moving scroll is movably arranged in the cavity, one side of the moving scroll is provided with moving scroll teeth, and the side of the moving scroll away from the moving scroll teeth forms a low-pressure chamber with the shell; the stationary scroll is fixedly arranged in the cavity, the side of the stationary scroll facing the moving scroll is provided with stationary scroll teeth, and the side of the stationary scroll away from the moving scroll forms a high-pressure chamber with the shell; the moving scroll teeth and the stationary scroll teeth are arranged alternately and cooperatively, wherein the inlet end of the moving scroll teeth away from the center of the moving scroll forms a first suction chamber with the stationary scroll teeth, and the inlet end of the stationary scroll teeth away from the center of the stationary scroll forms a second suction chamber with the moving scroll teeth, and the first suction chamber and the second suction chamber are both in communication with the low-pressure chamber; the stationary scroll is further provided with an oil return channel, the oil return channel comprises an oil inlet and at least a first oil outlet and a second oil outlet, the first oil outlet and the second oil outlet are both in communication with the oil inlet, the oil inlet is in communication with the high-pressure chamber, and the first oil outlet and the second oil outlet are respectively in communication with the first suction chamber and the second suction chamber; the driving mechanism is located in the cavity, and the driving mechanism is connected with the moving scroll and drives the moving scroll to rotate relative to the stationary scroll.

[0006] Preferably, the oil return channel further comprises a first oil outlet channel, a second oil outlet channel and an oil return groove, the oil return groove is arranged on the end face of the static scroll away from the dynamic scroll and communicates with the oil inlet; the first oil outlet channel penetrates the static scroll to form the first oil outlet and a first sub-oil inlet, the first sub-oil inlet is arranged in the oil return groove; the second oil outlet channel penetrates the static scroll to form the second oil outlet and a second sub-oil inlet, the second sub-oil inlet is also arranged in the oil return groove; along the direction of gravity, the second sub-oil inlet is located above the first sub-oil inlet.

[0007] Preferably, the oil return groove extends along the circumferential direction of the static scroll.

[0008] Preferably, the inner wall of the oil return groove is convexly provided with a drainage structure in the direction facing the second sub-oil inlet.

[0009] Preferably, the static scroll is further provided with a communication oil channel and a third sub-oil inlet; the third sub-oil inlet is also arranged in the oil return groove, and the third sub-oil inlet and the first sub-oil inlet are respectively located on the two sides of the second sub-oil inlet; the communication oil channel communicates with the third sub-oil inlet and the oil inlet.

[0010] Preferably, along the direction of gravity, the third sub-oil inlet is located below the second sub-oil inlet, and the third sub-oil inlet and the first sub-oil inlet are respectively located at the two ends of the oil return groove; the end face of the static scroll away from the dynamic scroll is further recessed to provide an oil inlet groove, the oil inlet groove is located between the two ends of the oil return groove and is arranged in a spaced manner with the oil return groove, the oil inlet groove communicates with the high-pressure cavity, and the oil inlet is arranged in the oil inlet groove.

[0011] Preferably, the communication oil channel is a blind hole channel, and the communication oil channel comprises an opening extending to the circumferential surface of the static scroll; further comprising a plug, the plug is arranged in the communication oil channel, and the plug comprises a plugging section, the plugging section is plugged in the opening.

[0012] Preferably, further comprising a first oil inlet channel and a second oil inlet channel; the first oil inlet channel communicates the oil inlet groove and the communication oil channel; the second oil inlet channel communicates the third sub-oil inlet and the communication oil channel;

[0013] The plug further comprises a throttling section, the throttling section is formed with a throttling channel, and the throttling end is located in the communication oil channel;

[0014] The end face of the throttling section away from the plugging section is located between the intersection of the first oil inlet channel and the communication oil channel and the intersection of the second oil inlet channel and the communication oil channel.

[0015] Preferably, the dynamic scroll tooth and the static scroll tooth are both helical, and the end-on projection of the dynamic scroll tooth on the end surface of the dynamic scroll plate and the end-on projection of the static scroll tooth on the end surface of the static scroll plate are both involutes, and the dynamic scroll tooth and the static scroll tooth are helical in the same direction. The throttle section outer surface is provided with an internal thread, the communication oil channel is circular in cross section, and the throttle channel is formed between the internal thread and the communication oil channel inner wall.

[0016] To solve the above technical problems, one technical scheme adopted by the present application is to provide a vehicle comprising the heat pump scroll compressor in any of the embodiments.

[0017] The heat pump scroll compressor of the present application has the following beneficial effects: Different from the prior art, the heat pump scroll compressor of the present application is provided with an oil return channel communicating the high-pressure cavity and the low-pressure cavity, and the oil return channel is provided with a plurality of oil outlets at one end close to the low-pressure cavity, which respectively communicate two suction cavities between the static scroll plate and the dynamic scroll plate. Since the dynamic scroll plate rotates relative to the static scroll plate, gas enters between the dynamic scroll tooth and the static scroll tooth from the two suction cavities, so that the refrigeration oil enters the suction cavities from the high-pressure cavity through the oil return channel, and then enters various parts between the dynamic scroll tooth and the static scroll tooth with the gas, thereby ensuring sufficient lubrication of the meshing parts of the two and forming an oil film, so that the reliability of the compressor is ensured. Moreover, the present application only provides the oil return channel on the static scroll plate, so the structure is simple, the processing is convenient, and the manufacturing cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a structural schematic view of one embodiment of the heat pump scroll compressor of the present application;

[0019] Figure 2 is a sectional view of one embodiment of the static scroll plate of the heat pump scroll compressor of the present application;

[0020] Figure 3 is a structural schematic view of one embodiment of the static scroll plate of the present application;

[0021] Figure 4 is a front view of Figure 3 ;

[0022] Figure 5 is a sectional view of Figure 4 in the direction of B-B;

[0023] Figure 6 is a sectional view of Figure 4 in the direction of A-A;

[0024] Figure 7 is a structural schematic view of one embodiment of the plug of the present application. DETAILED DESCRIPTION

[0025] For the purposes of the present application, the technical solutions and effects are more clear and explicit, the present application is further described in detail below with reference to the drawings and examples. Obviously, the described examples are only a part of the examples of the present application, rather than all the examples. Based on the examples in the present application, all other examples obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0026] Referring to Figure 1 , Figure 1 is a structural schematic diagram of an embodiment of the heat pump scroll compressor of the present application. It comprises a shell 1, a moving scroll 2, a fixed scroll 3 and a driving mechanism (not shown in the figure), the shell 1 has a cavity. The moving scroll 2 is movably arranged in the cavity, one side of the moving scroll 2 is provided with moving scroll teeth 21, and the side of the moving scroll 2 away from the moving scroll teeth 21 forms a low-pressure cavity 11 with the shell 1; the fixed scroll 3 is fixedly arranged in the cavity, and one side of the fixed scroll 3 facing the moving scroll 2 is provided with fixed scroll teeth 31, and the side of the fixed scroll 3 away from the moving scroll 2 forms a high-pressure cavity 12 with the shell 1; the moving scroll teeth 21 and the fixed scroll teeth 31 are arranged in interlaced manner. The driving mechanism is located in the cavity, and the driving mechanism is connected with the moving scroll 2 and drives the moving scroll 2 to rotate relative to the fixed scroll 3. Specifically, the driving mechanism comprises a motor 4 and a main shaft 41, the motor 4 drives the main shaft to rotate to drive the moving scroll 2 to revolve around the center of the fixed scroll 3, and the moving scroll 2 itself does not rotate, in the process of movement, the side of the moving scroll teeth 21 close to the end face of the fixed scroll 3 always adheres to the fixed scroll 3, and the side of the fixed scroll teeth 31 close to the end face of the moving scroll 2 always adheres to the moving scroll 2.

[0027] Specifically, referring to Figure 2 , Figure 2 is a sectional view of an embodiment of the fixed scroll of the heat pump scroll compressor of the present application. The moving scroll teeth 21 and the fixed scroll teeth 31 are both in spiral shape, and the orthographic projection of the moving scroll teeth 21 on the end face of the moving scroll 2 away from the moving scroll teeth 21 and the orthographic projection of the fixed scroll teeth 31 on the end face of the fixed scroll 3 away from the fixed scroll teeth 31 are both involutes, and the moving scroll teeth 21 and the fixed scroll teeth 31 are spiraled in the same direction.

[0028] As shown in Figure 1 and Figure 2 , the first suction cavity a1 is formed between the inlet end of the moving scroll teeth 21 away from the center of the moving scroll 2 and the fixed scroll teeth 31, the second suction cavity a2 is formed between the inlet end of the fixed scroll teeth 31 away from the center of the fixed scroll 3 and the moving scroll teeth 21, and the first suction cavity a1 and the second suction cavity a2 are both communicated with the low-pressure cavity 11.

[0029] Specifically, continuing to refer to Figure 2, at least two compression chambers and one exhaust chamber c are formed between the dynamic scroll teeth 21 and the static scroll teeth 31, the compression chambers are closed, including a first compression chamber b1 and a second compression chamber b2, both in the shape of a crescent, located on the inner side of the first suction chamber a1 and the second suction chamber a2 respectively. The exhaust chamber c is located on the inner side of the compression chamber, and is in communication with the exhaust hole 38 on the end face of the static scroll plate 3, and the exhaust hole 38 is in communication with the high-pressure chamber 12. It should be noted that the number of compression chambers is not limited to two, and the number increases with the increase of the number of turns of the static scroll teeth 31 and the dynamic scroll teeth 21.

[0030] As the dynamic scroll plate 2 rotates relative to the static scroll plate 3, the gas in the compressor first enters the compression chamber from the low-pressure chamber 11 through the first suction chamber a1 or the second suction chamber a2 (as shown by the arrow), and then gradually moves inward and is compressed in the compression chamber. Finally, the gas enters the innermost exhaust chamber c and enters the high-pressure chamber 12 through the exhaust hole 38, so that the gas is compressed. Figure 2

[0031] The static scroll plate 3 is also provided with an oil return channel, which includes an oil inlet 32a and at least a first oil outlet 36b and a second oil outlet 37b, and the first oil outlet 36b and the second oil outlet 37b are in communication with the oil inlet 32a, as shown. Figure 1 As shown, the oil inlet 32a is in communication with the high-pressure chamber 12, as shown. Figure 2 The first oil outlet 36b and the second oil outlet 37b are in communication with the first suction chamber a1 and the second suction chamber a2 respectively.

[0032] The heat pump scroll compressor of the present application is provided with an oil return channel communicating the high-pressure chamber 12 and the low-pressure chamber 11, and the refrigeration oil in the compressor moves in the opposite direction of the gas, from the high-pressure chamber 12 into the oil return channel through the oil inlet 32a, and then returns to the low-pressure chamber 11 through the oil return channel. The oil return channel is provided with a plurality of oil outlets at one end close to the low-pressure chamber 11, and the first oil outlet 36b and the second oil outlet 37b are in communication with the first suction chamber a1 and the second suction chamber a2 between the static scroll plate 3 and the dynamic scroll plate 2 respectively. Since the dynamic scroll plate 2 rotates relative to the static scroll plate 3, the gas enters between the dynamic scroll teeth 21 and the static scroll teeth 31 from the first suction chamber a1 and the second suction chamber a2, so that the refrigeration oil first enters the first suction chamber a1 and the second suction chamber a2 after coming out of the oil return channel. In this process, the refrigeration oil enters various parts between the dynamic scroll teeth 21 and the static scroll teeth 31 with the gas, ensuring sufficient lubrication of the meshing parts of the two, and forming an oil film, so that the reliability of the compressor is ensured. In addition, the present application only provides an oil return channel on the static scroll plate 3, which is simple in structure, convenient to process and low in manufacturing cost.

[0033] ​Optionally, in other embodiments, more than two oil outlets can be provided to communicate with the first suction cavity a1 and / or the second suction cavity a2, so that each part of the static scroll teeth 31 and the dynamic scroll teeth 21 can be sufficiently lubricated during operation.

[0034] Optionally, the oil return channel further comprises a first oil outlet channel 36, a second oil outlet channel 37 and an oil return groove 35. Referring to Figure 3 and Figure 4 , Figure 3 is a structural schematic view of an embodiment of the static scroll plate of the present application, Figure 4 is Figure 3 a front view. The oil return groove 35 is arranged on the end face of the static scroll plate 3 facing away from the dynamic scroll plate 2. Referring to Figure 5 , Figure 5 is Figure 4 a sectional view of the B-B direction in Figure 4 . The first oil outlet channel 36 penetrates the static scroll plate 3 to form a first oil outlet 36b and a first sub-oil inlet 36a, and the first sub-oil inlet 36a is arranged in the oil return groove 35; the second oil outlet channel 37 penetrates the static scroll plate 3 to form a second oil outlet 37b and a second sub-oil inlet 37a, and the second sub-oil inlet 37a is also arranged in the oil return groove 35; along the direction of gravity (Z direction in Figure 4 ), the second sub-oil inlet 37a is located above the first sub-oil inlet 36a.

[0035] The oil return groove 35 is used to connect the first sub-oil inlet 36a and the second sub-oil inlet 37a, and when the cooling oil enters the oil return groove 35, it can flow into the first sub-oil inlet 36a and the second sub-oil inlet 37a under the high pressure of the high-pressure cavity 12 along the oil return groove 35, so as to pass through the first oil outlet channel 36 and the second oil outlet channel 37, and finally enter the first suction cavity a1 and the second suction cavity a2 from the first oil outlet 36b and the second oil outlet 37b (see Figure 5portion of the cooling oil can enter the first sub-inlet 36a first, and another portion of the cooling oil enters the second sub-inlet 37a through the oil return groove 35; or a portion of the cooling oil can enter the second sub-inlet 37a first, and another portion of the cooling oil enters the first sub-inlet 36a through the oil return groove 35. The oil return groove 35 is located on the end face of the static scroll plate 3, which is convenient for manufacturing. The oil return groove 35 not only guides the cooling oil to enter the oil outlet channels located at different positions, but also prolongs the oil return path of the cooling oil, without the need for additional throttling devices, effectively reducing the cost of the entire machine and reducing the assembly process. Because the second sub-inlet 37a is located above the first sub-inlet 36a, the upper and lower parts of the dynamic scroll teeth 21 and the static scroll teeth 31 can be lubricated by the cooling oil, and an oil film is formed, so that the reliability of the entire compressor is ensured. Further, the second sub-inlet 37a can be located at the uppermost part of the oil return groove 35, so that the dynamic scroll teeth 21 and the static scroll teeth 31 are comprehensively lubricated. Alternatively, in other embodiments, more than two oil outlet channels can be provided through the static scroll plate 3, and a plurality of sub-inlets can be formed in the oil return groove 35 to expand the lubrication range.

[0036] Alternatively, the oil return groove 35 extends along the circumference of the static scroll plate 3. The circumferentially extending oil return groove 35 further prolongs the oil return path of the cooling oil. Because the sizes of the first suction chamber a1 and the second suction chamber a2 change with the movement of the dynamic scroll plate 2, the oil return groove 35 is arranged circumferentially on the static scroll plate 3 to ensure that the first oil outlet channel 36 and the second oil outlet channel 37 connected with the oil return groove 35 are connected with the suction chambers located at the periphery of the static scroll plate 3 and the dynamic scroll plate 2, ensuring that the compressor is sufficiently lubricated.

[0037] Alternatively, the inner wall of the oil return groove 35 is convexly provided with a flow guide structure 351 in the direction facing the second sub-inlet 37a. Specifically, in the direction of gravity, the flow guide structure 351 is located below the second sub-inlet 37a and protrudes upward, and the flow guide structure 351 forms a flow guide surface connected with the inner wall of the oil return groove 35, which further guides another portion of the cooling oil to enter the first sub-inlet 36a through the oil return groove 35. Because the second sub-inlet 37a is located above, the flow guide structure 351 is arranged to guide the cooling oil to the second sub-inlet 37a, thereby increasing the flow of the cooling oil in the second oil outlet channel 37 and avoiding the problem that the flow of the cooling oil is difficult to rise into the second sub-inlet 37a due to gravity, resulting in a decrease in flow.

[0038] Alternatively, referring to Figure 6 , Figure 6 is Figure 4 is a sectional view of A-A in FIG. 3. The static scroll plate 3 is further provided with a communication channel 33 and a third sub-inlet 34b; as Figure 3 、 Figure 4As shown, the third sub oil inlet 34b is also arranged in the oil return groove 35, and the third sub oil inlet 34b and the first sub oil inlet 36a are respectively located on two sides of the second sub oil inlet 37a; as Figure 6 As shown, the communication oil channel 33 communicates with the third sub oil inlet 34b and the oil inlet 32a.

[0039] Referring to the dashed arrow in Figure 6 , the cooling oil enters the communication oil channel 33 from the oil inlet 32a and then enters the oil return groove 35 from the third sub oil inlet 34b; as shown by the dashed arrow in Figure 4 , the cooling oil enters the oil return groove 35 from the third sub oil inlet 34b, and since the first sub oil inlet 36a and the third sub oil inlet 34b are respectively located on two sides of the second sub oil inlet 37a, the cooling oil first enters the second sub oil inlet 37a and then enters the first sub oil inlet 36a along the oil return groove 35, thereby further prolonging the oil return path of the cooling oil and improving the throttling effect.

[0040] Optionally, continuing to refer to Figure 4 , along the gravity direction (Z direction), the third sub oil inlet 34b is located below the second sub oil inlet 37a, and the third sub oil inlet 34b and the first sub oil inlet 36a are respectively located at two ends of the oil return groove 35. The cooling oil flows through the entire extension path of the oil return groove 35, thereby improving the throttling effect. As shown in Figure 3 and Figure 4 , the end face of the stationary scroll plate 3 away from the orbiting scroll plate 2 is also recessed to be provided with an oil inlet groove 321, the oil inlet groove 321 is located between the two ends 5 of the oil return groove 35 and is arranged in a spaced manner with the oil return groove 35, the oil inlet groove 321 communicates with the high-pressure cavity, and the oil inlet 32a is arranged in the oil inlet groove 321. The cooling oil flows from the high-pressure cavity 12 into the oil inlet groove 321 and then into the oil inlet 32a, avoiding flowing into other positions of the end face of the stationary scroll plate 3, and since the oil inlet groove 321 is located between the two ends of the oil return groove 35, the oil inlet 32a is located below the stationary scroll plate 3, which is

[0041] convenient for the communication oil channel to communicate with the high-pressure cavity 12 and be close to the third sub oil inlet 34b.

[0042] Optionally, continuing to refer to Figure 6 , the communication oil channel 33 is a blind hole channel, and the communication oil channel 33

[0043] includes an opening 33a extending to the circumferential surface of the stationary scroll plate 3. The blind hole channel is convenient for machining and can sequentially communicate the second oil inlet channel 34 and the first oil inlet channel 33 from the inside of the circumferential surface of the stationary scroll plate 3.

[0044] The channel 32 forms a connecting oil passage 33. It also includes a plug 5, which is disposed within the connecting oil passage 33. The plug 5 includes a sealing section that seals the opening 33a. The sealing section of the plug 5 is used to isolate the connecting oil passage 33, the second oil inlet channel 34, and the cavity outside the stationary vortex disk 3, preventing gas in the high-pressure chamber 12 from entering the low-pressure chamber 11 through the return oil channel. The plug 5 can be placed in the connecting oil passage 33 by means of threaded connection or interference fit.

[0045] Optionally, see Figure 6 and Figure 7 , Figure 7 This is a schematic diagram of the structure of one embodiment of the plug in this application. Figure 6 As shown, the return oil channel also includes a first oil inlet channel 32 and a second oil inlet channel 34. The first oil inlet channel 32 connects the oil inlet groove 321 and the connecting oil passage 33 to form an oil inlet 32a and a fourth sub-oil inlet 32b; the second oil inlet channel 34 connects the return oil groove 35 and the connecting oil passage 33 to form a third sub-oil inlet 34b and a fifth sub-oil inlet 34a. Figure 7 As shown, the plug 5 includes a seal

[0046] The system includes a blocking section 51 and a throttling section 52. A throttling channel is formed on the throttling section 52, which is located within the connecting oil passage. The end face of the throttling section 52 furthest from the blocking section 51 is located between the junction of the first oil inlet passage and the connecting oil passage, and the junction of the second oil inlet passage and the connecting oil passage. Specifically, as shown... Figure 6 As shown, the end face of the throttling section away from the blocking section is located between the fourth sub-inlet 32b and the fifth sub-inlet 34a. A throttling channel with a cross-section smaller than that of the connecting oil passage 33 is formed between the throttling section and the connecting oil passage 33. The throttling section is used to reduce the cross-section of the connecting oil passage 33, thereby reducing the flow rate and achieving throttling. The throttling section can be a columnar structure, such as a cylinder, with a cross-section smaller than that of the connecting oil passage 33, forming a throttling channel with a smaller cross-section between the outer circumferential surface of the throttling section and the inner wall of the flowing oil passage 33. In other embodiments, the throttling section and the blocking section can be provided separately; the diameters of the throttling section and the blocking section can be the same or different.

[0047] Optionally, please continue reading Figure 7 The outer surface of the throttling section 52 is provided with internal threads, and the cross-section of the connecting oil passage is circular. A throttling channel is formed between the internal threads and the inner wall of the connecting oil passage. The diameter of the throttling section can be the same as the diameter of the flowing oil passage 33. The spiral throttling channel formed between the internal threads and the inner wall of the connecting oil passage further extends the return oil path and reduces the flow rate.

[0048] To solve the above-mentioned technical problems, one technical solution adopted in this application is to provide a vehicle that includes a heat pump scroll compressor in any of the embodiments.

[0049] During the driving process in winter, the exhaust temperature of the heat pump compressor is high due to the low ambient temperature, and the viscosity of the lubricating oil is reduced. Therefore, by setting the oil return channel, the oil film of the part matching surface is prevented from being thinned or damaged, the friction loss of the part matching surface is reduced, and the service life of the heat pump compressor is improved.

[0050] The above is only an embodiment of the present application, and does not limit the patent scope of the present application. Any equivalent structure or equivalent process transformation using the content of the specification and drawings, or direct or indirect application in other related technical fields, is also included in the patent protection scope of the present application.

Claims

1. A heat pump scroll compressor characterized by, The heat pump scroll compressor comprises: a shell having a cavity; a moving scroll movably arranged in the cavity, one side of the moving scroll being provided with moving scroll teeth, and the side of the moving scroll away from the moving scroll teeth forming a low-pressure cavity with the shell; a fixed scroll fixedly arranged in the cavity, one side of the fixed scroll facing the moving scroll being provided with fixed scroll teeth, and the side of the fixed scroll away from the moving scroll forming a high-pressure cavity with the shell; the moving scroll teeth and the fixed scroll teeth are arranged in interlaced manner, wherein a first suction cavity is formed between the moving scroll teeth away from the inlet end of the center of the moving scroll and the fixed scroll teeth, a second suction cavity is formed between the fixed scroll teeth away from the inlet end of the center of the fixed scroll and the moving scroll teeth, and the first suction cavity and the second suction cavity are both communicated with the low-pressure cavity; the fixed scroll is further provided with an oil return channel, the oil return channel comprising an oil inlet and at least a first oil outlet and a second oil outlet, the first oil outlet and the second oil outlet are both communicated with the oil inlet, the oil inlet is communicated with the high-pressure cavity, and the first oil outlet and the second oil outlet are respectively communicated with the first suction cavity and the second suction cavity; a driving mechanism located in the cavity, the driving mechanism being connected with the moving scroll and driving the moving scroll to rotate relative to the fixed scroll.

2. The heat pump scroll compressor according to claim 1, wherein the oil return channel further comprises a first oil outlet channel, a second oil outlet channel and an oil return groove, the oil return groove is arranged on the end face of the side of the fixed scroll away from the moving scroll and communicated with the oil inlet; the first oil outlet channel penetrates through the fixed scroll to form the first oil outlet and a first sub-oil inlet, the first sub-oil inlet is arranged in the oil return groove; the second oil outlet channel penetrates through the fixed scroll to form the second oil outlet and a second sub-oil inlet, the second sub-oil inlet is also arranged in the oil return groove; along the direction of gravity, the second sub-oil inlet is located above the first sub-oil inlet.

3. The heat pump scroll compressor according to claim 2, wherein the oil return groove extends along the circumferential direction of the fixed scroll.

4. The heat pump scroll compressor according to claim 2, wherein the inner wall of the oil return groove is convexly provided with a flow guide structure in the direction facing the second sub-oil inlet.

5. The heat pump scroll compressor of claim 2, wherein, the fixed scroll is further provided with a communication oil channel and a third sub-oil inlet; the third sub-oil inlet is also arranged in the oil return groove, and the third sub-oil inlet and the first sub-oil inlet are respectively located on the two sides of the second sub-oil inlet; the communication oil channel is communicated with the third sub-oil inlet and the oil inlet.

6. The heat pump scroll compressor according to claim 5, wherein along the direction of gravity, the third sub-oil inlet is located below the second sub-oil inlet, and the third sub-oil inlet and the first sub-oil inlet are respectively located at the two ends of the oil return groove. An end face of the stationary scroll plate away from the orbiting scroll plate is also concavely provided with an oil inlet groove, the oil inlet groove is located between two ends of the oil return groove and is spaced apart from the oil return groove, the oil inlet groove is in communication with the high-pressure cavity, and the oil inlet is arranged in the oil inlet groove.

7. The heat pump scroll compressor of claim 6, wherein, The communication oil channel is a blind hole channel, and the communication oil channel includes an opening extending through the circumferential surface of the stationary scroll plate; The plug is further arranged in the communication oil channel, and the plug includes a plugging section that plugs the opening.

8. The heat pump scroll compressor according to claim 7, characterized in that, The first oil inlet channel and the second oil inlet channel are further arranged, the first oil inlet channel is in communication with the oil inlet groove and the communication oil channel, and the second oil inlet channel is in communication with the third oil inlet and the communication oil channel. The plug further includes a throttling section, the throttling section is arranged in the communication oil channel, and a throttling channel is formed in the throttling section. An end face of the throttling section away from the plugging section is located between the intersection of the first oil inlet channel and the communication oil channel and the intersection of the second oil inlet channel and the communication oil channel.

9. The heat pump scroll compressor according to claim 8, characterized in that, An inner thread is arranged on an outer surface of the throttling section, a cross section of the communication oil channel is circular, and a throttling channel is formed between the inner thread and an inner wall of the communication oil channel.

10. The heat pump scroll compressor of claim 1, wherein, The orbiting scroll teeth and the stationary scroll teeth are both helical, and the orbiting scroll teeth and the stationary scroll teeth are helical in the same direction.

11. A vehicle characterized by comprising: The heat pump scroll compressor according to any one of claims 1-10.

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