Oil return assembly and electric scroll compressor
By designing an oil return assembly in the scroll compressor, multiple suction ducts and oil outlet grooves are used to guide the refrigeration oil to key components, solving the problem of ineffective lubrication of refrigeration oil and improving the lubrication effect and reliability of the compressor.
Patent Information
- Application Number
- CN202422959179.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-02
- Publication Date
- 2025-10-21
- Estimated Expiration
- 2034-12-02
Smart Images
Figure CN223459552U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to scroll compression technical field, specifically, relate to a kind of oil return assembly and electric scroll compressor. BACKGROUND
[0002] Scroll compressor is a kind of volumetric compressor with high efficiency, low noise and stable operation. During operation, scroll compressor needs refrigeration oil to seal scroll compressor pump body parts and improve volumetric efficiency of compressor. At the same time, it lubricates friction pairs to avoid wear of transmission parts caused by lack of oil and improve reliability of compressor. In the prior art, high-pressure side refrigeration oil separated by oil separation structure is guided to the compression chamber and friction pairs through an oil return passage by using a throttling structure. Specifically, high-temperature and high-pressure oil-gas mixture discharged from the static scroll is separated by an oil separation pipe, and the gas is discharged from the exhaust port of the top cover, while the refrigeration oil is guided to the suction chamber at the back of the static scroll through the oil return passage of the static scroll after throttling and pressure reduction by the oil return micro-passage on the wear-resistant sheet. Thus, the performance and reliability of the compressor are affected.
[0003] Since the refrigeration oil of the structure directly enters the low-pressure chamber of the compressor, it does not reach the main bearing and the driving bearing of the dynamic disc. Moreover, the refrigeration oil reaching the low-pressure chamber cannot control the amount of oil entering the compression chamber, which also makes the lubrication and sealing effect of the scroll part of the entire compressor worse. SUMMARY
[0004] The utility model aims to provide, for example, an oil return assembly and an electric scroll compressor, which can timely and efficiently lubricate the main bearing, the driving bearing of the dynamic disc and the scroll part.
[0005] The embodiment of the utility model can be implemented as follows:
[0006] In a first aspect, the utility model provides an oil return assembly, comprising:
[0007] An oil return passage, a main frame and a static scroll;
[0008] A bearing chamber is arranged at the center of the main frame; a first suction passage and a second suction passage are further arranged on the main frame, and both the first suction passage and the second suction passage penetrate the main frame along the axial direction of the main frame; the first suction passage is in communication with the suction chamber of the static scroll, and the second suction passage is in communication with the suction chamber of the dynamic scroll; the static scroll is hermetically arranged at the top of the main frame;
[0009] The oil return passage comprises an oil return groove, a connecting oil passage, a first oil outlet groove and a second oil outlet groove; the oil return groove is in communication with the outlet of the oil return hole of the static scroll;
[0010] One end of the first oil outlet groove is communicated with the first air suction channel, and the other end is communicated with the bearing chamber; one end of the second oil outlet groove is communicated with the second air suction channel, and the other end is communicated with the bearing chamber; one end of the connecting oil channel is communicated with the oil return groove, and the other end is communicated with the first oil outlet groove and the second oil outlet groove respectively.
[0011] In an optional embodiment, the connecting oil channel comprises a first oil channel and a second oil channel;
[0012] Along the circumferential direction of the main frame, the first oil channel and the second oil channel are located on two sides of the oil return groove respectively; two ends of the first oil channel are connected with the oil return groove and the first air suction channel respectively, and two ends of the second oil channel are connected with the oil return groove and the second air suction channel respectively;
[0013] Along the circumferential direction of the main frame, the width of the first oil channel is d1, and the width of the second oil channel is d2; d2=d1.
[0014] In an optional embodiment, the connecting oil channel comprises a first oil channel and a second oil channel;
[0015] Along the circumferential direction of the main frame, the first oil channel is located on one side of the oil return groove; two ends of the first oil channel are connected with the oil return groove and the first air suction channel respectively, and two ends of the second oil channel are connected with the first air suction channel and the second air suction channel respectively;
[0016] Along the circumferential direction of the main frame, the width of the first oil channel is d1, and the width of the second oil channel is d2; d2≥d1.
[0017] In an optional embodiment, the first oil channel and the second oil channel extend along the arc shape of the center of the main frame;
[0018] Along the radial direction of the main frame, the first oil channel and the second oil channel have the same distance from the center of the main frame.
[0019] In an optional embodiment, the first oil outlet groove and the second oil outlet groove are arranged on the end face of the main frame close to the static scroll.
[0020] In an optional embodiment, the oil return groove, the connecting oil channel, the first oil outlet groove and the second oil outlet groove are arranged on the end face of the main frame close to the static scroll.
[0021] In an optional embodiment, a first wear-resistant sheet is further included;
[0022] The first wear-resistant sheet is tightly arranged between the main frame and the static scroll; the first wear-resistant sheet has a matching channel, a top surface of the matching channel is connected with an outlet of the oil return channel of the static scroll, and a bottom surface of the matching channel is connected with the oil return groove.
[0023] In an optional embodiment, a second wear-resistant sheet is further included.
[0024] The second wear-resistant sheet is tightly arranged between the first wear-resistant sheet and the main frame; the oil return groove and the connecting oil channel are both throughly arranged on the second wear-resistant sheet.
[0025] In an optional embodiment, a throttle pin is further included.
[0026] The throttle pin is arranged at the outlet of the oil return channel of the static scroll.
[0027] In a second aspect, the utility model provides a kind of electric scroll compressor, and the electric scroll compressor includes the oil return assembly of any one of the foregoing embodiments.
[0028] The beneficial effects of the embodiments of the utility model include, for example:
[0029] The oil return assembly includes an oil return channel, a main frame and a static scroll. The main frame is provided with a first suction channel communicating with a suction cavity of the static scroll and a second suction channel communicating with a suction cavity of a dynamic scroll. The oil return channel can respectively guide the refrigeration oil from the oil return channel of the static scroll to the bearing chamber, the suction cavity of the dynamic scroll and the suction cavity of the static scroll. The bearing chamber is opposite to the compression cavity between the static scroll and the dynamic scroll, so as to complete the lubrication of the main bearing, the dynamic disc driving bearing and the compression cavity. In summary, the oil return assembly has simple structure and is easy to set, which can significantly improve the lubrication effect of the scroll compressor. BRIEF DESCRIPTION OF DRAWINGS
[0030] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the utility model, and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.
[0031] Figure 1 It is a schematic view of the assembly of the oil return assembly of the first embodiment of the utility model;
[0032] Figure 2 It is a schematic view of the main frame structure of the oil return assembly of the first embodiment of the utility model;
[0033] Figure 3Structure schematic view of another implementation mode of the main frame of the oil return assembly of the utility model embodiment one;
[0034] Figure 4 Assembly schematic view of the oil return assembly of the utility model embodiment two;
[0035] Figure 5 Structure schematic view of the oil return assembly of the utility model embodiment two.
[0036] Icon: 10-oil return assembly; 100-oil return channel; 110-oil return groove; 120-connecting oil passage; 121-first oil passage; 122-second oil passage; 131-first oil outlet groove; 132-second oil outlet groove; 200-main frame; 210-bearing chamber; 221-first air suction passage; 222-second air suction passage; 300-stationary scroll; 310-oil return hole passage; 400-throttle pin; 510-first wear-resistant sheet; 511-matching hole passage; 520-second wear-resistant sheet; 21-top cover; 22-oil separation tube; 23-oil return filter screen. DETAILED DESCRIPTION
[0037] In order to make the purpose, technical scheme and advantages of the utility model embodiments clearer, the technical scheme of the utility model embodiments will be described clearly and completely below in combination with the drawings in the utility model embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. The components of the utility model embodiments described and shown in the drawings here can be arranged and designed in various different configurations.
[0038] Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the claimed utility model, but only represents selected embodiments of the utility model. Based on the embodiments in the utility model, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the utility model.
[0039] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0040] In the description of the utility model, it should be noted that if the terms "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, therefore it cannot be understood as a limitation on the utility model.
[0041] In addition, if the terms "first", "second" and the like are used herein, they are merely used to distinguish the description, and cannot be understood as indicating or implying relative importance.
[0042] It should be noted that the features in the embodiments of the present application can be combined with each other without conflict.
[0043] The high-temperature and high-pressure oil-gas mixed fluid discharged by the static scroll in the prior art is separated by the oil separation pipe, the gas is discharged from the exhaust port of the top cover, and the refrigeration oil is throttled and depressurized through the oil return micro-passage on the wear-resistant sheet, and finally returns to the suction chamber at the back of the static scroll through the oil return passage of the static scroll.
[0044] Because the refrigeration oil directly enters the low-pressure cavity of the compressor without reaching the main bearing and the driving bearing of the dynamic disc, the main bearing and the driving bearing cannot be effectively lubricated, and especially when the compressor is running under high speed and heavy load, the bearings may be abraded, thereby causing the failure of the compressor.
[0045] Moreover, the refrigeration oil reaching the low-pressure cavity cannot control the amount of oil entering the compression cavity, which also makes the lubrication and sealing effect of the entire scroll part of the compressor worse, thereby affecting the performance and reliability of the compressor.
[0046] When the compressor is running, the refrigeration oil sucked into the compression cavity will gather at the lower part of the scroll compression cavity under the action of gravity, and the lubricating oil distribution in the upper part of the scroll compression cavity is less, and abnormal wear may occur in the upper half part due to less refrigeration oil when running at high speed or under high load, thereby causing the failure of the compressor.
[0047] To improve the above technical problems, an oil return assembly and an electric scroll compressor are provided in the following embodiments.
[0048] Embodiment one
[0049] Please refer to Figure 1 The embodiment provides an oil return assembly 10, which comprises an oil return passage 100, a main frame 200 and a static scroll 300.
[0050] The bearing chamber 210 is arranged at the center of the main frame 200; the first suction passage 221 and the second suction passage 222 are further arranged on the main frame 200, and the first suction passage 221 and the second suction passage 222 both penetrate the main frame 200 along the axial direction of the main frame 200; the first suction passage 221 is in communication with the suction chamber of the static scroll 300, and the second suction passage 222 is in communication with the suction chamber of the dynamic scroll; and the static scroll 300 is hermetically arranged at the top of the main frame 200.
[0051] The oil return channel 100 comprises an oil return groove 110, a connecting oil channel 120, a first oil outlet groove 131 and a second oil outlet groove 132; the oil return groove 110 is in communication with the outlet of the oil return channel 310 of the static scroll 300;
[0052] One end of the first oil outlet groove 131 is in communication with the first suction channel 221, and the other end is in communication with the bearing chamber 210; one end of the second oil outlet groove 132 is in communication with the second suction channel 222, and the other end is in communication with the bearing chamber 210; one end of the connecting oil channel 120 is in communication with the oil return groove 110, and the other end is in communication with the first oil outlet groove 131 and the second oil outlet groove 132, respectively.
[0053] The main frame 200 of the oil return assembly 10 is provided with the first suction channel 221 in communication with the suction cavity of the static scroll 300 and the second suction channel 222 in communication with the suction cavity of the dynamic scroll. The oil return channel 100 can respectively guide the refrigerant oil from the oil return channel 310 of the static scroll 300 to the bearing chamber 210, the suction cavity of the dynamic scroll and the suction cavity of the static scroll 300, and the bearing chamber 210 is opposite to the compression cavity between the static scroll 300 and the dynamic scroll, so as to complete the lubrication of the main bearing, the dynamic scroll driving bearing and the compression cavity.
[0054] Please continue to refer to Figure 1 , Figure 2 and Figure 3 for more structural details of the oil return assembly 10. As can be seen from the drawings, the connecting oil channel 120 comprises a first oil channel 121 and a second oil channel 122; along the circumferential direction of the main frame 200, the width of the first oil channel 121 is d1, and the width of the second oil channel 122 is d2. Along the radial direction of the main frame 200, the first oil outlet groove 131 and the second oil outlet groove 132 are located on one side of the main frame 200, and the oil return groove 110 is located on the other side of the main frame 200.
[0055] From Figure 1 and Figure 2 , in the alternative embodiment, the oil return groove 110, the connecting oil channel 120, the first oil outlet groove 131 and the second oil outlet groove 132 are all arranged on the end face of the main frame 200 close to the static scroll 300. That is, the oil return channel 100 is arranged on the end face of the main frame 200.
[0056] In the alternative embodiment, along the circumferential direction of the main frame 200, the first oil channel 121 and the second oil channel 122 are respectively located on both sides of the oil return groove 110; the two ends of the first oil channel 121 are respectively connected to the oil return groove 110 and the first suction channel 221, and the two ends of the second oil channel 122 are respectively connected to the oil return groove 110 and the second suction channel 222; and d2=d1.
[0057] Specifically, the first oil outlet groove 131 and the second oil outlet groove 132 are arranged at the end face of the main frame 200 close to the static scroll 300, and the oil return effect is good. The first oil channel 121 and the second oil channel 122 are arranged on the left and right sides of the oil return groove 110 respectively, so that the oil can flow back from the oil return hole 310 of the static scroll 300, the oil return groove 110, the first oil channel 121, the first oil outlet groove 131 to the first suction channel 221, and from the oil return hole 310 of the static scroll 300, the oil return groove 110, the second oil channel 122, the second oil outlet groove 132 to the second suction channel 222. In this way, the refrigeration oil flows out of the oil outlet groove of the main frame 200 under the suction effect of the compressor. The first oil outlet groove 131 and the second oil outlet groove 132 are arranged along the radial direction of the main frame 200, and one end communicates with the bearing chamber 210 of the main frame 200, and the other end communicates with the suction channel of the main frame 200, thereby improving the lubrication of the main bearing and the upper half of the scroll.
[0058] Further, in the optional embodiment, the first oil channel 121 and the second oil channel 122 extend along the center arc of the main frame 200; along the radial direction of the main frame 200, the first oil channel 121 and the second oil channel 122 are the same distance from the center of the main frame 200. That is, the first oil channel 121 and the second oil channel 122 are concentrically arranged, so that the oil can flow uniformly and smoothly to the first oil outlet groove 131 and the second oil outlet groove 132 respectively.
[0059] In the optional embodiment, the oil return assembly 10 further comprises a first wear-resistant sheet 510; the first wear-resistant sheet 510 is hermetically arranged between the main frame 200 and the static scroll 300; the first wear-resistant sheet 510 has a matching hole 511, the top surface of the matching hole 511 is connected with the outlet of the oil return hole 310 of the static scroll 300, and the bottom surface of the matching hole 511 is connected with the oil return groove 110. That is, the first wear-resistant sheet 510 and the main frame 200 enclose the oil return groove 110, the connecting oil channel 120, the first oil outlet groove 131 and the second oil outlet groove 132 into a channel with a peripheral wall. Thus, the airtightness of the oil return channel 100 is ensured.
[0060] In the optional embodiment, the oil return assembly 10 further comprises a throttle pin 400; the throttle pin 400 is arranged at the outlet of the oil return hole 310 of the static scroll 300. The throttle pin 400 can throttle and depressurize the oil in the oil return hole 310.
[0061] As Figure 3In other embodiments of the utility model, along the circumferential direction of the main frame 200, the first oil channel 121 is located on one side of the oil return groove 110; the two ends of the first oil channel 121 are connected with the oil return groove 110 and the first air suction channel 221 respectively, the two ends of the second oil channel 122 are connected with the first air suction channel 221 and the second air suction channel 222 respectively; and d2 >= d1. Specifically, the first oil outlet groove 131 and the second oil outlet groove 132 are both arranged on the end face of the main frame 200 close to the static scroll 300, and the connecting oil channel 120 is only arranged on one side of the main frame 200 along the circumferential direction of the oil return groove 110, and the refrigeration oil flows from the static scroll 300 oil hole channel 310, the oil return groove 110 to the first oil outlet groove 131 and the second oil outlet groove 132 under the suction of the compressor. Due to the different distribution positions of the flow channels, the refrigeration oil will be preferentially sucked away by the first oil outlet groove 131, at this time, the oil outlet groove width relationship is d2 >= d1, which ensures the refrigeration oil suction amount of the second oil outlet groove 132.
[0062] In a second aspect, the utility model provides a kind of electric scroll compressor, and electric scroll compressor includes the oil return assembly 10 of any one of preceding embodiment. Electric scroll compressor further includes main bearing, dynamic scroll, oil-gas separation structure and top cover 21. Main bearing is arranged in bearing chamber 210. Dynamic scroll is located between main frame 200 and static scroll 300, and top cover 21 is arranged on the top of static scroll 300 away from main frame 200. Dynamic scroll and static scroll 300 are enclosed to form compression chamber, and the part that dynamic scroll and static scroll 300 mutually flat circumferential motion is scroll portion. Oil-gas separation structure is arranged in top cover 21. The side of main frame 200 away from static scroll 300 is low-pressure chamber, and low-pressure chamber is located in the motor shell of scroll compressor.
[0063] Further, static scroll 300 is provided with exhaust port, and top cover 21 is provided with oil-gas separation structure, and oil-gas separation structure is mainly composed of oil separation pipe 22 and oil return filter screen 23. When high-temperature and high-pressure oil-gas mixed fluid output by static scroll 300 exhaust port is output to oil separation structure, oil-gas separation starts, at this time, high-temperature and high-pressure refrigerant gas is discharged through the exhaust port of the top cover 21 of compressor, and refrigeration oil is returned through oil return channel 100 due to gravity and pressure difference, and lubricates friction pair of scroll compressor, so that the recycling of refrigeration oil is realized.
[0064] When oil return assembly 10 works, refrigeration oil separated by oil-gas is filtered through oil return filter screen 23, and then flows into the oil return channel 100 of static scroll 300, and is discharged by throttling pin 400 built-in static scroll 300.
[0065] Low-pressure refrigeration oil reaches main frame 200 oil return groove 110 through the matching hole 511 on the first wear-resistant sheet 510.
[0066] The refrigeration oil, under the suction negative pressure of the suction passage (the first suction passage 221 and the second suction passage 222, same below), flows into the bearing chamber 210 of the main frame 200 through the oil outlet groove (the first oil outlet groove 131 and the second oil outlet groove 132, same below) to lubricate the main bearing, and part of the refrigeration oil flows back to the scroll part through the suction passage to improve the lubrication of the entire compressor and improve the reliability of the compressor.
[0067] Part of the refrigeration oil is directly sucked into the compression chamber of the scroll to be compressed, thereby improving the lubrication of the upper half of the scroll.
[0068] Embodiment Two
[0069] Please refer to Figure 4 and Figure 5 As can be seen from the figure, the scheme of the embodiment is basically the same as that of Embodiment One, and the difference between the two is that the scheme further includes a second friction plate, and the oil return groove 110 and the connecting oil passage 120 are arranged on the second friction plate.
[0070] In an optional implementation, the oil return assembly 10 further includes a second wear plate 520; the second wear plate 520 is arranged in a sealed manner between the first wear plate 510 and the main frame 200; the oil return groove 110 and the connecting oil passage 120 are both arranged in a penetrating manner on the second wear plate 520. That is, the first wear plate 510, the second wear plate 520 and the main frame 200 are enclosed to form a channel with a closed wall for the oil return groove 110, the connecting oil passage 120, the first oil outlet groove 131 and the second oil outlet groove 132.
[0071] In assembly, the upper surface of the first wear plate 510 is tightly attached to the end surface of the static scroll 300. The second wear plate 520 is provided with the oil return groove 110 and the connecting oil passage 120, and in assembly, the upper surface of the second wear plate 520 is tightly attached to the lower surface of the first wear plate 510, and the lower surface of the second wear plate 520 is tightly attached to the end surface of the main frame 200. Specifically, the refrigeration oil, which is throttled and depressurized by the throttle pin 400, flows into the oil return groove 110 on the second wear plate 520 through the matching hole 511 on the first wear plate 510. Figure 5 As shown in the figure, the refrigeration oil, under the suction negative pressure, flows into the oil outlet groove (the first oil outlet groove 131 and the second oil outlet groove 132, same below) arranged on the main frame 200 from the oil return passage 100 of the second wear plate 520. One end of the oil outlet groove is in communication with the suction passage (the first suction passage 221 and the second suction passage 222, same below), and part of the refrigeration oil flows back to the low-pressure chamber, and part of the refrigeration oil directly enters the scroll part under the suction negative pressure of the suction passage to lubricate the upper half of the scroll. The other end of the oil outlet groove is in communication with the bearing chamber 210 of the main frame 200 to lubricate the main bearing, thereby strengthening the lubrication effect of the friction pair, avoiding friction loss, and improving the performance of the scroll compressor.
[0072] Further, in the embodiment, the first oil outlet groove 131 and the second oil outlet groove 132 are arranged on the end surface of the main frame 200 close to the static scroll 300. Optionally, the first oil channel 121 is located on one side of the oil return groove 110; the two ends of the first oil channel 121 are connected with the oil return groove 110 and the first suction channel 221 respectively, and the two ends of the second oil channel 122 are connected with the first suction channel 221 and the second suction channel 222 respectively. In this way, the structure of the second friction plate is simplified, and the structural stability of the oil return assembly 10 is improved.
[0073] The oil return assembly 10 and the electric scroll compressor have at least the following advantages:
[0074] 1. The main frame 200 is provided with the oil return channel 100, and the structure is simple and the oil return is reliable. In the whole flow process of the refrigeration oil, the oil return effect of the whole compressor is improved. The compressor has sufficient oil return, the friction pairs are well lubricated, the friction loss is avoided, and the performance and reliability of the whole compressor are improved.
[0075] 2. The oil outlet groove of the main frame 200 is located at the upper portion, which is beneficial to improve the lubrication of the main bearing and the upper half of the scroll, improve the sealing performance of the scroll part, and improve the reliability of the scroll part.
[0076] 3. The oil return groove 110 of the main frame 200 is located at the bottom, and the oil return effect is good.
[0077] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.
Claims
1. An oil return assembly, characterized by, The oil return assembly comprises an oil return channel (100), a main frame (200), and a static scroll (300). The main frame (200) is provided with a bearing chamber (210) at the center thereof; the main frame (200) is further provided with a first air suction passage (221) and a second air suction passage (222), both of which penetrate the main frame (200) along the axial direction of the main frame (200); the first air suction passage (221) is in communication with an air suction cavity of the static scroll (300), and the second air suction passage (222) is in communication with an air suction cavity of a dynamic scroll; the static scroll (300) is hermetically arranged on the top of the main frame (200); The oil return channel (100) comprises an oil return groove (110), a connecting oil passage (120), a first oil outlet groove (131), and a second oil outlet groove (132); the oil return groove (110) is in communication with the outlet of an oil return hole (310) of the static scroll (300); One end of the first oil outlet groove (131) is in communication with the first air suction passage (221), and the other end thereof is in communication with the bearing chamber (210); one end of the second oil outlet groove (132) is in communication with the second air suction passage (222), and the other end thereof is in communication with the bearing chamber (210); one end of the connecting oil passage (120) is in communication with the oil return groove (110), and the other end thereof is in communication with the first oil outlet groove (131) and the second oil outlet groove (132) respectively.
2. The oil return assembly according to claim 1, wherein: The connecting oil passage (120) comprises a first oil passage (121) and a second oil passage (122); Along the circumferential direction of the main frame (200), the first oil passage (121) and the second oil passage (122) are located on the two sides of the oil return groove (110) respectively; the two ends of the first oil passage (121) are connected to the oil return groove (110) and the first air suction passage (221) respectively, and the two ends of the second oil passage (122) are connected to the oil return groove (110) and the second air suction passage (222) respectively; Along the circumferential direction of the main frame (200), the width of the first oil passage (121) is d1, and the width of the second oil passage (122) is d2; d2=d1.
3. The oil return assembly according to claim 1, wherein: The connecting oil passage (120) comprises a first oil passage (121) and a second oil passage (122); Along the circumferential direction of the main frame (200), the first oil passage (121) is located on one side of the oil return groove (110); the two ends of the first oil passage (121) are connected to the oil return groove (110) and the first air suction passage (221) respectively, and the two ends of the second oil passage (122) are connected to the first air suction passage (221) and the second air suction passage (222) respectively; Along the circumferential direction of the main frame (200), the width of the first oil passage (121) is d1, and the width of the second oil passage (122) is d2; d2≥d1. 4. The oil return assembly according to claim 2 or 3, characterized in that: the first oil channel (121) and the second oil channel (122) extend along a circular arc of the center of the main frame (200); in the radial direction of the main frame (200), the first oil channel (121) and the second oil channel (122) are at the same distance from the center of the main frame (200).
5. The oil return assembly according to claim 1, characterized in that: the first oil outlet groove (131) and the second oil outlet groove (132) are arranged on the end surface of the main frame (200) close to the static scroll (300).
6. The oil return assembly according to claim 5, characterized in that: the oil return groove (110), the connecting oil channel (120), the first oil outlet groove (131) and the second oil outlet groove (132) are arranged on the end surface of the main frame (200) close to the static scroll (300).
7. The oil return assembly according to claim 5, characterized in that: further comprising a first wear plate (510); the first wear plate (510) is arranged between the main frame (200) and the static scroll (300) in a sealed manner; the first wear plate (510) has a matching hole (511), the top surface of the matching hole (511) is connected with the outlet of the oil return hole (310) of the static scroll (300), and the bottom surface of the matching hole (511) is connected with the oil return groove (110).
8. The oil return assembly according to claim 7, characterized in that: further comprising a second wear plate (520); the second wear plate (520) is arranged between the first wear plate (510) and the main frame (200) in a sealed manner; the oil return groove (110) and the connecting oil channel (120) are arranged through the second wear plate (520).
9. The oil return assembly according to claim 1, characterized in that: further comprising a throttle pin (400); the throttle pin (400) is arranged at the outlet of the oil return hole (310) of the static scroll (300).
10. An electric scroll compressor, characterized in that: the electric scroll compressor comprises the oil return assembly according to any one of claims 1-9.