Oil return structure of scroll compressor

Abstract

The oil return structure of the scroll compressor comprises a compressor body and a pressing partition plate arranged in the compressor body, the compressor body is divided into a high-pressure cavity and a low-pressure cavity through the pressing partition plate, an exhaust port is formed in the high-pressure cavity, and an oil discharge hole communicated with the high-pressure cavity and the low-pressure cavity is formed in the pressing partition plate. An oil return assembly for intercepting an oil-gas mixture is arranged on the pressure partition plate and located in the high-pressure cavity, an inlet with a downward opening is formed in the middle of the lower end of the oil return assembly, a plurality of flow guide holes are formed in the oil return assembly, and the flow guide holes communicate with the inlet and the outer side of the oil return assembly. According to the scheme, the external oil circulation rate is reduced, namely the oil circulation rate of the refrigerating system is reduced, and the refrigerating effect of the compressor is improved; the filtered oil flows into the low-pressure cavity of the scroll compressor from the oil discharge hole through the oil return assembly, a friction pair of the compressor is lubricated again, the oil circulation amount in the compressor is controlled, and the reliability of the scroll compressor is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of scroll compressors, in particular to an oil return structure of a scroll compressor. Background Art

[0002] Scroll compressors are increasingly used, mainly in freezing, refrigeration, automotive air conditioning and other occasions. Scroll compressors usually include a fixed scroll and a movable scroll. When the compressor is working, the fixed scroll is fixed, and the movable scroll is driven by the motor to engage with the fixed scroll. The crankshaft inside the scroll compressor rotates under the drive of the motor, forming an oil-gas mixture of refrigerant and lubricating oil mist inside the compressor. The oil-gas mixture is sucked into the compression chamber by the passive scroll, and then enters the exhaust chamber and circulates in the refrigeration system. Lubrication conditions are particularly important during the operation of the compressor, which directly determines the performance and service life of the scroll compressor. Existing scroll compressors generally use external oil circulation to supply oil. Excessive external oil circulation rate will cause the performance of the refrigeration system to decline. As the scroll compressor runs, more and more lubricating oil enters the refrigeration system, affecting the lubrication of the scroll compressor, and then affecting the reliability of the scroll compressor.

[0003] For example, Chinese patent publication number CN116357573A, publication date June 30, 2023, named "A scroll compressor sealing structure", includes a stator and a movable plate, the stator is provided with a stator scroll tooth, the movable plate is provided with a movable plate scroll tooth, the movable plate is provided with a first depth bottom surface and a second depth bottom surface parallel to the tooth surface of the movable plate scroll tooth, the first depth bottom surface and the second depth bottom surface are connected by a first progressive transition surface; the stator is provided with a third depth bottom surface and a fourth depth bottom surface parallel to the tooth surface of the stator scroll tooth, the third depth bottom surface and the fourth depth bottom surface are connected by a second progressive transition surface.

[0004] The disadvantages of the existing patent are: the existing scroll compressor adopts external oil circulation to supply oil, and too large an external oil circulation rate will cause the performance of the refrigeration system to decline. As the scroll compressor runs, more and more lubricating oil enters the refrigeration system, affecting the lubrication of the scroll compressor, and further affecting the reliability of the scroll compressor. Utility Model Content

[0005] The purpose of the utility model is to solve the problem that the existing scroll compressor adopts an external oil circulation method to supply oil, and an excessively large external oil circulation rate will lead to a decline in the performance of the refrigeration system and affect the reliability of the scroll compressor. The utility model provides a scroll compressor oil return structure that can reduce the external oil circulation rate, improve the refrigeration efficiency and the reliability of the whole machine.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A scroll compressor oil return structure includes a compressor body and a diaphragm disposed in the compressor body, the compressor body is divided into a high-pressure chamber and a low-pressure chamber by the diaphragm, an exhaust port is provided in the high-pressure chamber, an oil drain hole connecting the high-pressure chamber and the low-pressure chamber is provided on the diaphragm, an oil return assembly intercepting an oil-gas mixture is provided on the diaphragm, the oil return assembly is located in the high-pressure chamber, an inlet opening downward is provided in the middle of the lower end of the oil return assembly, a plurality of guide holes are provided in the oil return assembly, and the guide holes connect the inlet and the outside of the oil return assembly. The scroll compressor oil return structure described in this scheme realizes external oil circulation and internal oil circulation through the exhaust port, the oil return assembly and the oil drain hole disposed on the diaphragm, on the one hand, reduces the external oil circulation rate, that is, reduces the oil circulation rate of the refrigeration system, and improves the refrigeration effect of the compressor; on the other hand, the filtered oil flows from the oil drain hole to the low-pressure chamber of the scroll compressor through the oil return assembly to re-lubricate the friction pair of the compressor, and improve the reliability of the scroll compressor.

[0008] In the prior art, a scroll plate is provided in the compressor body, and the scroll plate includes a fixed scroll plate and a movable scroll plate. When the scroll compressor is working, the fixed scroll plate is fixed, and the movable scroll plate is driven by the motor to mesh with the fixed scroll plate. A protrusion is provided at the upper end of the scroll plate, and a mounting hole is provided on the pressure partition plate. The mounting hole on the pressure partition plate is fitted together with the protrusion on the scroll plate. The oil-gas mixture enters the inlet of the oil return assembly through the mounting hole. The oil return assembly is arranged on the pressure partition plate to intercept the oil return assembly. The oil-gas mixture enters the guide hole through the inlet of the oil return assembly, and continuously hits the inner wall of the guide hole so that the oil mist gathers and falls. The oil-gas mixture after passing through the oil return assembly hits the inner wall of the compressor body so that the oil that is not completely separated is further separated. The oil liquid finally separated enters the low-pressure chamber through the oil discharge hole, re-lubricates the friction pair of the compressor, and completes the internal circulation. The separated oil-gas mixture is discharged through the exhaust port for external circulation.

[0009] Preferably, the guide hole is a centrifugal guide hole. The oil-gas mixture after passing through the oil return assembly hits the inner wall of the compressor body so that the incompletely separated oil is further separated.

[0010] Preferably, the bottom height of the guide hole gradually decreases from the inlet to the outside of the oil return assembly. The bottom height of the guide hole gradually decreases outward to prevent oil from flowing back, so that the oil flows smoothly into the oil drain hole.

[0011] Preferably, the edge of the diaphragm is sealed and connected to the inner wall of the compressor body, an oil passage is formed between the compressor body and the outer wall of the diaphragm, the oil passage is located in the high-pressure chamber, and the oil drain hole is connected to the oil passage. The oil return assembly is located above the oil passage. On the one hand, the oil passage is used to store oil, and on the other hand, an oil seal is formed to separate the high-pressure chamber and the low-pressure chamber to prevent the refrigerant from entering the low-pressure chamber and affecting the refrigeration effect of the scroll compressor. The oil-gas separation efficiency is ensured while reducing the exhaust pressure loss, and the compressor performance is improved; the oil circulation volume in the compressor is controlled to improve the compressor performance.

[0012] Preferably, the oil drain hole is divided into an oil storage tank provided on the pressure partition plate and an oil guide hole connected to the oil storage tank, the oil storage tank opening faces the high-pressure chamber, and the oil guide hole is located at the lower end of the oil storage tank. One end of the oil guide hole is connected to the oil storage tank, and the other end is connected to the low-pressure chamber. The cross-sectional area of ​​the oil storage tank is larger than the cross-sectional area of ​​the oil guide hole. The oil storage tank is used to store oil, separate the high-pressure chamber and the low-pressure chamber, and prevent the refrigerant from entering the low-pressure chamber to affect the refrigeration effect of the scroll compressor.

[0013] Preferably, the guide holes are distributed in a circle with the inlet as the center, one end of the guide holes is connected to the inlet, and the other end is connected to the outside of the oil return assembly. The guide holes are distributed in a circle so that the oil-gas mixture is evenly dispersed on the side wall of the guide holes.

[0014] Preferably, a baffle is provided outside the guide hole facing the exhaust port. A gap is provided between the lower end of the baffle and the lower end of the guide hole to facilitate the discharge of oil in the guide hole into the oil channel. The baffle prevents the oil-gas mixture from directly entering the exhaust hole.

[0015] Preferably, the oil return assembly includes a shell for intercepting the oil-gas mixture and a plurality of guide plates arranged in the shell, the shell is arranged on the pressure plate, the inlet is located in the middle of the lower end of the shell, and a guide hole is formed between two adjacent guide plates and the inner wall of the shell. The shell includes two mounting plates arranged vertically opposite to each other, the guide plate is arranged between the two mounting plates, and a guide hole is formed between two adjacent guide plates and the inner wall of the mounting plates.

[0016] Preferably, the guide plate is a centrifugal guide plate, which is distributed in a circle with the inlet as the center. The guide plate is arc-shaped, and the guide hole is a centrifugal guide hole, so that the oil-gas mixture passing through the guide hole hits the inner wall of the compressor body again, so that the oil that is not completely separated is further separated.

[0017] Preferably, the exhaust port, the oil drain hole and the baffle are all located on the same side of the oil return assembly to prevent the oil-gas mixture from directly entering the exhaust port and the oil drain hole.

[0018] Preferably, the oil return assembly and the pressure partition are coaxially arranged.

[0019] Therefore, the utility model has the following beneficial effects: reducing the external oil circulation rate, that is, reducing the oil circulation rate of the refrigeration system, and improving the refrigeration effect of the compressor; the filtered oil flows from the oil drain hole to the low-pressure chamber of the scroll compressor through the oil return component, re-lubricating the friction pair of the compressor, controlling the oil circulation amount in the compressor, and improving the reliability of the scroll compressor; ensuring the oil-gas separation efficiency while reducing the exhaust pressure loss, and improving the compressor performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a sectional view of the utility model.

[0021] Figure 2 It is a structural schematic diagram of the oil return component in this embodiment.

[0022] Figure 3 It is a cross-sectional view of the medium-pressure partition of the utility model.

[0023] Figure 4 It is a cross-sectional view of the oil return component in the utility model.

[0024] As shown in the figure:

[0025] Compressor body 1, high pressure chamber 1.1, low pressure chamber 1.2, exhaust port 1.3,

[0026] Pressure plate 2, oil drain hole 2.1, oil storage tank 2.1.1, oil guide hole 2.1.2,

[0027] Oil return assembly 3, inlet 3.1, guide hole 3.2, shell 3.3, guide plate 3.4,

[0028] Oil channel 4, baffle 5. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical scheme and advantages of the technical solution embodiments of the utility model clearer, the utility model is further described below in conjunction with the accompanying drawings and specific implementation methods.

[0030] Embodiment 1, as Figure 1 , Figure 2 , Figure 3 , Figure 4The oil return structure of a scroll compressor shown in the figure includes a compressor body 1 and a diaphragm 2 arranged in the compressor body 1, the compressor body 1 is divided into a high-pressure chamber 1.1 and a low-pressure chamber 1.2 by the diaphragm 2, the high-pressure chamber 1.1 is provided with an exhaust port 1.3, the diaphragm 2 is provided with an oil discharge hole 2.1 connecting the high-pressure chamber 1.1 and the low-pressure chamber 1.2, the diaphragm 2 is provided with an oil return component 3 for intercepting the oil-gas mixture, the oil return component 3 is located in the high-pressure chamber 1.1, the lower middle part of the oil return component 3 is provided with an inlet 3.1 opening facing downward, the oil return component 3 is provided with a plurality of guide holes 3.2, the guide holes 3.2 connect the inlet 3.1 and the outside of the oil return component 3.

[0031] The scroll compressor oil return structure described in the above embodiment realizes external oil circulation and internal oil circulation through the exhaust port 1.3, the oil return assembly 3 and the oil drain hole 2.1 arranged on the pressure partition plate 2. On the one hand, the external oil circulation rate is reduced, that is, the oil circulation rate of the refrigeration system is reduced, and the refrigeration effect of the compressor is improved; on the other hand, the filtered oil is flowed from the oil drain hole 2.1 to the low-pressure chamber 1.2 of the scroll compressor through the oil return assembly 3, and the friction pair of the compressor is re-lubricated, thereby improving the reliability of the scroll compressor.

[0032] In the prior art, a scroll plate is provided in the compressor body 1, and the scroll plate includes a fixed scroll plate and a movable scroll plate. When the scroll compressor is working, the fixed scroll plate is fixed, and the movable scroll plate is driven by the motor to engage with the fixed scroll plate. A protrusion is provided at the upper end of the scroll plate, and a mounting hole is provided on the pressure partition plate 2. The mounting hole on the pressure partition plate 2 is fitted together with the protrusion on the scroll plate. The oil-gas mixture enters the inlet 3.1 of the oil return assembly 3 through the mounting hole. The oil return assembly 3 is arranged on the pressure partition plate 2 to intercept the oil return assembly 3. The oil-gas mixture enters the guide hole 3.2 through the inlet 3.1 of the oil return component 3, and continuously hits the inner wall of the guide hole 3.2 to cause the oil mist to gather and fall. The oil-gas mixture after passing through the oil return component 3 hits the inner wall of the compressor body 1 to further separate the incompletely separated oil. Finally, the separated oil enters the low-pressure chamber 1.2 through the oil discharge hole 2.1, re-lubricates the friction pair of the compressor, completes the internal circulation, and the separated oil-gas mixture is discharged through the exhaust port 1.3 for external circulation. The existing scroll compressor adopts the external oil circulation method to supply oil. If the external oil circulation rate is too large, it will cause the performance of the refrigeration system to decline. As the scroll compressor is running, more and more lubricating oil enters the refrigeration system, which affects the lubrication of the scroll compressor, and then affects the reliability of the scroll compressor.

[0033] Furthermore, Figure 2 As shown, the guide hole 3.2 is a centrifugal guide hole 3.2. The oil-gas mixture after passing through the oil return assembly 3 hits the inner wall of the compressor body 1 so that the incompletely separated oil is further separated.

[0034] Specifically, Figure 1 , Figure 4 As shown, the bottom height of the guide hole 3.2 gradually decreases from the inlet 3.1 to the outside of the oil return assembly 3. The bottom height of the guide hole 3.2 gradually decreases outward to prevent the oil from flowing back, so that the oil can flow smoothly into the oil discharge hole 2.1.

[0035] In this embodiment, Figure 1 , Figure 3 As shown, the edge of the pressure partition 2 is sealed and connected to the inner wall of the compressor body 1, and an oil passage 4 is formed between the compressor body 1 and the outer wall of the pressure partition 2. The oil passage 4 is located in the high-pressure chamber 1.1, and the oil drain hole 2.1 is connected to the oil passage 4. The oil return assembly 3 is located above the oil passage 4. On the one hand, the oil passage 4 is used to store oil, and on the other hand, an oil seal is formed to separate the high-pressure chamber 1.1 and the low-pressure chamber 1.2 to prevent the refrigerant from entering the low-pressure chamber 1.2 and affecting the refrigeration effect of the scroll compressor. The oil-gas separation efficiency is ensured while reducing the exhaust pressure loss, and the compressor performance is improved; the oil circulation volume in the compressor is controlled to improve the compressor performance.

[0036] Further, such as Figure 2 As shown, the guide holes 3.2 are distributed in a circle with the inlet 3.1 as the center, one end of the guide hole 3.2 is connected to the inlet 3.1, and the other end is connected to the outside of the oil return assembly 3. The guide holes 3.2 are distributed in a circle so that the oil-gas mixture is evenly dispersed on the side wall of the guide hole 3.2.

[0037] Further, such as Figure 1 , Figure 2 , Figure 4 As shown, a baffle 5 is provided outside the guide hole 3.2 facing the exhaust port 1.3. A gap is provided between the lower end of the baffle 5 and the lower end of the guide hole 3.2 to facilitate the discharge of the oil in the guide hole 3.2 into the oil channel 4. The baffle 5 prevents the oil-gas mixture from directly entering the exhaust hole.

[0038] Further, such as Figure 2 As shown, the oil return assembly 3 includes a shell 3.3 for intercepting the oil-gas mixture and a plurality of guide plates 3.4 arranged in the shell 3.3. The shell 3.3 is arranged on the pressure partition plate 2. The inlet 3.1 is located in the middle of the lower end of the shell 3.3. A guide hole 3.2 is formed between two adjacent guide plates 3.4 and the inner wall of the shell 3.3. The shell 3.3 includes two mounting plates arranged vertically opposite to each other. The guide plate 3.4 is arranged between the two mounting plates. A guide hole 3.2 is formed between two adjacent guide plates 3.4 and the inner wall of the mounting plates. Figure 2 , Figure 4As shown, the guide plate 3.4 is a centrifugal guide plate 3.4, and the centrifugal guide plate 3.4 is distributed in a circle with the inlet 3.1 as the center. The guide plate 3.4 is arc-shaped, and the guide hole 3.2 is a centrifugal guide hole 3.2, so that the oil-gas mixture passing through the guide hole 3.2 hits the inner wall of the compressor body 1 again, so that the oil that is not completely separated is further separated.

[0039] Further, such as Figure 1 As shown, the exhaust port 1.3, the oil drain hole 2.1 and the baffle plate 5 are all located on the same side of the oil return assembly 3. This prevents the oil-gas mixture from directly entering the exhaust port 1.3 and the oil drain hole 2.1. The oil return assembly 3 and the pressure partition plate 2 are coaxially arranged.

[0040] The utility model has the following beneficial effects: reducing the external oil circulation rate, that is, reducing the oil circulation rate of the refrigeration system, and improving the refrigeration effect of the compressor; the filtered oil flows from the oil discharge hole 2.1 to the low-pressure chamber 1.2 of the scroll compressor through the oil return component 3, re-lubricating the friction pair of the compressor, controlling the oil circulation amount in the compressor, and improving the reliability of the scroll compressor; ensuring the oil-gas separation efficiency while reducing the exhaust pressure loss, and improving the compressor performance.

[0041] Embodiment 2, as Figure 3 The oil return structure of a scroll compressor shown in the figure includes a compressor body 1 and a diaphragm 2 arranged in the compressor body 1, the compressor body 1 is divided into a high-pressure chamber 1.1 and a low-pressure chamber 1.2 by the diaphragm 2, the high-pressure chamber 1.1 is provided with an exhaust port 1.3, the diaphragm 2 is provided with an oil discharge hole 2.1 connecting the high-pressure chamber 1.1 and the low-pressure chamber 1.2, the diaphragm 2 is provided with an oil return component 3 for intercepting the oil-gas mixture, the oil return component 3 is located in the high-pressure chamber 1.1, the lower middle part of the oil return component 3 is provided with an inlet 3.1 opening facing downward, the oil return component 3 is provided with a plurality of guide holes 3.2, the guide holes 3.2 connect the inlet 3.1 and the outside of the oil return component 3. The oil drain hole 2.1 is divided into an oil storage tank 2.1.1 provided on the pressure partition plate 2 and an oil guide hole 2.1.2 connected to the oil storage tank 2.1.1. The oil storage tank 2.1.1 opens toward the high-pressure chamber 1.1, and the oil guide hole 2.1.2 is located at the lower end of the oil storage tank 2.1.1. One end of the oil guide hole 2.1.2 is connected to the oil storage tank 2.1.1, and the other end is connected to the low-pressure chamber 1.2. The cross-sectional area of ​​the oil storage tank 2.1.1 is larger than the cross-sectional area of ​​the oil guide hole 2.1.2. The oil storage tank 2.1.1 is used to store oil, separate the high-pressure chamber 1.1 and the low-pressure chamber 1.2, and prevent the refrigerant from entering the low-pressure chamber 1.2 to affect the refrigeration effect of the scroll compressor.

[0042] Furthermore, Figure 2As shown, the guide hole 3.2 is a centrifugal guide hole 3.2. The oil-gas mixture after passing through the oil return assembly 3 hits the inner wall of the compressor body 1 so that the incompletely separated oil is further separated.

[0043] Specifically, Figure 1 , Figure 4 As shown, the bottom height of the guide hole 3.2 gradually decreases from the inlet 3.1 to the outside of the oil return assembly 3. The bottom height of the guide hole 3.2 gradually decreases outward to prevent the oil from flowing back, so that the oil can flow smoothly into the oil discharge hole 2.1.

[0044] In this embodiment, Figure 1 , Figure 3 As shown, the edge of the pressure partition 2 is sealed and connected to the inner wall of the compressor body 1, and an oil passage 4 is formed between the compressor body 1 and the outer wall of the pressure partition 2. The oil passage 4 is located in the high-pressure chamber 1.1, and the oil drain hole 2.1 is connected to the oil passage 4. The oil return assembly 3 is located above the oil passage 4. On the one hand, the oil passage 4 is used to store oil, and on the other hand, an oil seal is formed to separate the high-pressure chamber 1.1 and the low-pressure chamber 1.2 to prevent the refrigerant from entering the low-pressure chamber 1.2 and affecting the refrigeration effect of the scroll compressor. The oil-gas separation efficiency is ensured while reducing the exhaust pressure loss, and the compressor performance is improved; the oil circulation volume in the compressor is controlled to improve the compressor performance.

[0045] Further, such as Figure 2 As shown, the guide holes 3.2 are distributed in a circle with the inlet 3.1 as the center, one end of the guide hole 3.2 is connected to the inlet 3.1, and the other end is connected to the outside of the oil return assembly 3. The guide holes 3.2 are distributed in a circle so that the oil-gas mixture is evenly dispersed on the side wall of the guide hole 3.2.

[0046] Further, such as Figure 1 , Figure 2 , Figure 4 As shown, a baffle 5 is provided outside the guide hole 3.2 facing the exhaust port 1.3. A gap is provided between the lower end of the baffle 5 and the lower end of the guide hole 3.2 to facilitate the discharge of the oil in the guide hole 3.2 into the oil channel 4. The baffle 5 prevents the oil-gas mixture from directly entering the exhaust hole.

[0047] Further, such as Figure 2As shown, the oil return assembly 3 includes a shell 3.3 for intercepting the oil-gas mixture and a plurality of guide plates 3.4 arranged in the shell 3.3. The shell 3.3 is arranged on the pressure partition plate 2. The inlet 3.1 is located in the middle of the lower end of the shell 3.3. A guide hole 3.2 is formed between two adjacent guide plates 3.4 and the inner wall of the shell 3.3. The shell 3.3 includes two mounting plates arranged vertically opposite to each other. The guide plate 3.4 is arranged between the two mounting plates. A guide hole 3.2 is formed between two adjacent guide plates 3.4 and the inner wall of the mounting plates. Figure 2 , Figure 4 As shown, the guide plate 3.4 is a centrifugal guide plate 3.4, and the centrifugal guide plate 3.4 is distributed in a circle with the inlet 3.1 as the center. The guide plate 3.4 is arc-shaped, and the guide hole 3.2 is a centrifugal guide hole 3.2, so that the oil-gas mixture passing through the guide hole 3.2 hits the inner wall of the compressor body 1 again, so that the oil that is not completely separated is further separated.

[0048] Further, such as Figure 1 As shown, the exhaust port 1.3, the oil drain hole 2.1 and the baffle plate 5 are all located on the same side of the oil return assembly 3. This prevents the oil-gas mixture from directly entering the exhaust port 1.3 and the oil drain hole 2.1. The oil return assembly 3 and the pressure partition plate 2 are coaxially arranged.

[0049] The basic structure is based on the second embodiment, and the guide hole 3.2 is further optimized. The cross-sectional area of ​​the guide hole 3.2 gradually decreases outward from the center of the oil return component 3, so that the speed of the oil-gas mixture flowing through the guide hole 3.2 increases, the force impinging on the scroll compressor is greater, and the oil-liquid separation efficiency is higher.

[0050] Furthermore, the thickness of the guide plate 3.4 gradually increases outward from the center of the oil return assembly 3, so that the cross-sectional area of ​​the guide hole 3.2 gradually decreases outward from the center of the oil return assembly 3, so that the speed of the oil-gas mixture flowing through the guide hole 3.2 increases, and the force that hits the scroll compressor is greater, so that the oil-liquid separation efficiency is higher. The existing scroll compressor only uses external oil circulation to supply oil. If the external oil circulation rate is too large, the performance of the refrigeration system will be reduced. As the scroll compressor runs, more and more lubricating oil enters the refrigeration system, which affects the lubrication of the scroll compressor, and then affects the reliability of the scroll compressor.

[0051] The specific embodiments described above are only preferred implementations of the present invention, and are not intended to limit the specific implementation scope of the present invention. All equivalent changes made in accordance with the shape and structure of the present invention should be included in the protection scope of the present invention.

Claims

1. A scroll compressor oil return structure, comprising a compressor body and a pressure partition plate arranged in the compressor body, the compressor body is divided into a high-pressure chamber and a low-pressure chamber by the pressure partition plate, and an exhaust port is arranged in the high-pressure chamber, characterized in that: The pressure baffle is provided with an oil discharge hole connecting the high-pressure chamber and the low-pressure chamber, and the pressure baffle is provided with an oil return assembly for intercepting the oil-gas mixture. The oil return assembly is located in the high-pressure chamber, and an inlet opening facing downward is provided in the middle of the lower end of the oil return assembly. The oil return assembly is provided with a plurality of guide holes, which connect the inlet and the outside of the oil return assembly.

2. The scroll compressor oil return structure according to claim 1, characterized in that: The bottom height of the guide hole gradually decreases from the inlet to the outside of the oil return component.

3. The scroll compressor oil return structure according to claim 2, characterized in that: The edge of the pressure partition is sealed and connected to the inner wall of the compressor body, an oil passage is formed between the compressor body and the outer wall of the pressure partition, the oil passage is located in the high-pressure chamber, and the oil drain hole is connected to the oil passage.

4. A scroll compressor oil return structure according to claim 1, 2 or 3, characterized in that: The oil drain hole is divided into an oil storage tank arranged on the pressure partition plate and an oil guide hole connected with the oil storage tank. The oil storage tank opens toward the high-pressure chamber, and the oil guide hole is located at the lower end of the oil storage tank.

5. A scroll compressor oil return structure according to claim 1, 2 or 3, characterized in that: The guide holes are distributed in a circle with the inlet as the center, one end of the guide holes is connected to the inlet, and the other end is connected to the outside of the oil return component.

6. A scroll compressor oil return structure according to claim 1, 2 or 3, characterized in that: A baffle is arranged on the outer side of the guide hole facing the exhaust port.

7. The scroll compressor oil return structure according to claim 6, characterized in that: The oil return assembly includes a shell for intercepting the oil-gas mixture and a plurality of guide plates arranged in the shell. The shell is arranged on the pressure partition plate, the inlet is located in the middle of the lower end of the shell, and a guide hole is formed between two adjacent guide plates and the inner wall of the shell.

8. The scroll compressor oil return structure according to claim 7, characterized in that: The guide plates are centrifugal guide plates, and the centrifugal guide plates are distributed in a circle with the inlet as the center.

9. The scroll compressor oil return structure according to claim 8, characterized in that: The exhaust port, the oil drain hole and the baffle are all located on the same side of the oil return assembly.

10. A scroll compressor oil return structure according to claim 1, 2 or 3, characterized in that: The oil return assembly and the pressure partition plate are coaxially arranged.

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