A low-pressure oil separation device for refrigeration system

Abstract

The present application relates to the field of oil-liquid separators, and in particular to a low-pressure oil separation device for a refrigeration system, which includes a liquid storage tank, the liquid storage tank is provided with a liquid inlet and a liquid outlet, and also includes a liquid tray arranged in the liquid storage tank and a baffle arranged above the liquid tray, the liquid inlet is arranged at the top of the liquid storage tank and corresponds to the liquid tray in the vertical direction, the baffle is arranged in an inclined manner, the bottom of the liquid tray is provided with a liquid discharge port, the liquid tray is provided with an oil suction pipe for discharging lubricating oil, one end of the oil suction pipe is connected to the inside of the liquid tray and the other end extends to the outside of the liquid storage tank. The present application has the effect of ensuring the stability of oil return in the refrigeration system.

Description

Technical Field

[0001] The present application relates to the field of oil-liquid separators, and in particular to a low-pressure oil separation device for a refrigeration system. Background Art

[0002] Refrigeration systems are often involved in various fields such as production, life, freezing and refrigeration. In the compressor refrigeration cycle system, lubricating oil needs to be added to lubricate, seal and cool the compressor. Therefore, what is compressed and discharged by the compressor is actually a mixture of refrigerant and lubricating oil. The presence of lubricating oil will reduce the heat exchange effect of the condenser and evaporator, thereby affecting the refrigeration effect. If the amount of lubricating oil is insufficient, the compressor will shut down or even be damaged.

[0003] Therefore, the current refrigeration system is equipped with an oil separator or a so-called low-pressure circulation barrel. The low-pressure circulation barrel can be used to guide a part of the lubricating oil in the oil liquid or oil-gas mixture back to the compressor to achieve the purpose of compressor oil return. However, since the density of the lubricating oil is smaller than that of the refrigerant (such as Freon), the lubricating oil floats on the upper layer of the liquid refrigerant. Therefore, the existing separator or low-pressure circulation barrel generally uses the oil-rich layer in the barrel to extract oil.

[0004] However, when the low-pressure circulation barrel is operating normally, various factors will cause the liquid level in the barrel to fluctuate greatly, and the mixed liquid in the barrel will not remain in a relatively stable state for a long time. In addition, due to the fixed position of the oil return hole, when the liquid level of the oil layer is lower than or higher than the oil return hole, the oil cannot be returned or the returned oil purity is low, and it is impossible to provide sufficient lubricating oil for lubrication of the compressor. Therefore, it is very easy for the refrigeration system to stop refrigerating or the compressor to be damaged. Summary of the invention

[0005] In order to ensure the stability of oil return, the present application provides a low-pressure oil separation device for a refrigeration system.

[0006] The present application provides a low-pressure oil separation device for a refrigeration system, which adopts the following technical solution: a low-pressure oil separation device for a refrigeration system, comprising a liquid storage tank, the liquid storage tank being provided with a liquid inlet and a liquid outlet, and also comprising a liquid receiving pan arranged in the liquid storage tank and a baffle arranged above the liquid receiving pan, the liquid inlet being arranged at the top of the liquid storage tank and corresponding to the liquid receiving pan in the vertical direction, the baffle being arranged at an inclination, a liquid drain port being provided at the bottom of the liquid receiving pan, the liquid receiving pan being provided with an oil suction pipe for discharging lubricating oil, one end of the oil suction pipe being connected to the interior of the liquid receiving pan and the other end extending to the outside of the liquid storage tank.

[0007] By adopting the above technical solution, by arranging a liquid receiving pan and a baffle in the liquid storage tank, when the oil-liquid mixture enters the liquid storage tank through the liquid inlet, the baffle is used to buffer the oil-liquid mixture, so that the oil-liquid mixture slowly enters the liquid receiving pan after the baffle, thereby reducing the liquid level fluctuation in the liquid receiving pan, so that the oil suction pipe can continuously and stably absorb the lubricating oil layer on the upper layer.

[0008] Preferably, a partition is provided in the liquid receiving pan on a lower side close to the baffle, two ends of the partition are respectively fixedly connected to the inner walls on both sides of the liquid receiving pan, and the bottom end of the partition is spaced apart from the bottom surface of the bottom of the liquid receiving pan.

[0009] By adopting the above technical solution, a partition is arranged in the liquid receiving tray to make the liquid level in the liquid receiving tray more stable.

[0010] Preferably, an oil suction nozzle is provided in the liquid receiving pan, and the oil suction nozzle is disc-shaped, a cavity is opened inside the oil suction nozzle, the oil suction pipe is connected to the bottom of the liquid receiving pan, a drainage hose with one end connected to the oil suction pipe is provided in the liquid receiving pan, the other end of the drainage hose is connected to the bottom of the oil suction nozzle and connected to the cavity, a plurality of oil suction ports connected to the cavity are opened on the side wall of the oil suction nozzle, and the overall density of the oil suction nozzle is lower than the density of the lubricating oil.

[0011] By adopting the above technical scheme, an oil suction nozzle is provided, and the overall density of the oil suction nozzle is lower than the density of the lubricating oil. In the state without external force, the oil suction nozzle floats on the surface of the lubricating oil layer, and under the action of gravity, a part of the bottom of the oil suction nozzle sinks into the lubricating oil layer, that is, the oil suction port sinks into the lubricating oil layer, and the lubricating oil flows out of the liquid receiving pan through the oil suction port, the cavity and the drainage hose. When the lubricating oil layer is discharged, since the density of the refrigerant liquid layer is greater than that of the lubricating oil layer, a greater buoyancy is generated on the oil suction nozzle, and the position of the oil suction port completely floats above the refrigerant liquid layer, so that the oil suction nozzle can only discharge the lubricating oil layer.

[0012] Preferably, a conical protrusion is provided at the bottom of the oil suction nozzle.

[0013] By adopting the above technical solution, a conical protrusion is provided at the bottom of the oil suction nozzle to lower the center of gravity of the entire oil suction nozzle, so that the state of the oil suction nozzle in the liquid is more stable and is not easily affected by liquid level fluctuations.

[0014] Preferably, a closing mechanism is provided at the drain port in the liquid receiving tray, and the closing mechanism includes a fixed sleeve fixedly connected to the drain port and communicated with the drain port, and a sphere arranged in the fixed sleeve, the fixed sleeve is vertically arranged, and the fixed sleeve is arranged in a shape with a large inner diameter in the middle and small inner diameters at both ends, the sphere is located in the middle of the fixed sleeve, and the diameter of the sphere is smaller than the inner diameter at both ends of the fixed sleeve, and a plurality of through holes connected to the inner wall of the fixed sleeve are opened near the bottom of the outer wall of the fixed sleeve.

[0015] By adopting the above technical solution and setting a sealing mechanism, when the refrigerant liquid is discharged through the drain port, the sphere arranged in the fixed sleeve is subjected to the buoyancy of the refrigerant liquid and floats to the top of the fixed sleeve, thereby opening the bottom opening of the fixed sleeve and allowing the bottom refrigerant liquid to be discharged through the through hole. After the refrigerant liquid is discharged, the buoyancy of the remaining lubricating oil layer on the sphere is reduced, and the sphere falls to seal the opening at the bottom of the fixed sleeve to prevent the lubricating oil from being discharged from the drain port.

[0016] Preferably, a floating and sinking plate is provided in the liquid receiving pan, the density of the floating and sinking plate is less than the density of the refrigerant liquid and greater than the density of the lubricating oil, and a drainage hose with one end connected to the oil suction pipe is provided in the liquid receiving pan, and the other end of the drainage hose is connected to the bottom of the floating and sinking plate and connected to the top surface of the floating and sinking plate.

[0017] By adopting the above technical solution, a floating plate is set up so that the floating plate floats between the lubricating oil layer and the refrigerant liquid layer in the absence of external force, thereby driving the drainage hose to move, so that the inlet end of the drainage hose is always located in the lubricating oil layer, reducing the discharge of refrigerant liquid from the oil suction pipe.

[0018] Preferably, an annular baffle is provided at the outer edge of the top surface of the buoyancy plate, and the outer wall of the annular baffle is provided with a plurality of oil inlets connected to the inner wall thereof.

[0019] By adopting the above technical solution, an annular baffle is set and an oil inlet is opened on the annular baffle, so that the part above the floating plate forms a relatively stable oil storage space, so that the drainage hose can discharge the lubricating oil more stably and continuously.

[0020] Preferably, a closing block is provided at the bottom of the buoyancy plate, and the closing block corresponds to the drainage port in the vertical direction.

[0021] By adopting the above technical solution, by setting the closing block and the drain port to cooperate with each other, the floating plate floats on the boundary line between the lubricating oil layer and the refrigerant liquid layer due to the gravity and buoyancy. After the refrigerant liquid layer is discharged through the drain port, the floating plate descends and the closing block is sealed at the opening of the drain port to prevent the lubricating oil from being discharged from the drain port.

[0022] Preferably, a plurality of guide holes are formed on the floating plate, and a plurality of guide rods extending in a vertical direction and slidably inserted into the guide holes in a one-to-one correspondence are fixedly connected in the liquid receiving tray.

[0023] By adopting the above technical solution, with the cooperation of the guide rod and the guide hole, the moving path and the posture of the floating and sinking plate in the vertical direction are limited, so that when the floating and sinking plate is falling, the closing block at the bottom can accurately correspond to the drain port and close the drain port.

[0024] Preferably, a limit block is provided at the top end of the guide rod.

[0025] By adopting the above technical solution, the floating and sinking plate is limited by the limiting block to prevent the floating and sinking plate from being separated from the guide rod when there is too much refrigerant in the liquid receiving tray.

[0026] In summary, the present application includes at least one of the following beneficial technical effects:

[0027] 1. The liquid receiving pan and the baffle are arranged to cooperate. When the oil-liquid mixture enters the liquid storage tank through the liquid inlet, the baffle is used to buffer the oil-liquid mixture, so that the oil-liquid mixture enters the liquid receiving pan slowly after passing through the baffle, thereby reducing the liquid level fluctuation in the liquid receiving pan, so that the oil suction pipe can continuously and stably absorb the lubricating oil layer on the upper layer;

[0028] 2. By setting the oil suction nozzle, the oil suction nozzle can float on the surface of the lubricating oil layer, and under the action of gravity, a part of the bottom of the oil suction nozzle sinks into the lubricating oil layer, that is, the oil suction port sinks into the lubricating oil layer. When the lubricating oil layer is discharged, since the density of the refrigerant liquid layer is greater than that of the lubricating oil layer, a greater buoyancy is generated for the oil suction nozzle. The position of the oil suction port completely floats above the refrigerant liquid layer, so that the oil suction nozzle can only discharge the lubricating oil layer, and the separation of the lubricating oil and the refrigerant liquid is more thorough;

[0029] 3. By setting up a sealing mechanism, when the refrigerant is discharged, the ball is floated to the top of the fixed sleeve by the buoyancy of the refrigerant, thereby opening the bottom opening of the fixed sleeve. After the refrigerant is discharged, the buoyancy of the remaining lubricating oil layer on the ball is reduced, and the ball falls to seal the bottom opening of the fixed sleeve, preventing the lubricating oil from being discharged from the discharge port;

[0030] 4. By setting the floating plate, the drainage hose can be driven to move, so that the inlet end of the drainage hose is always located in the lubricating oil layer, reducing the discharge of refrigerant from the oil suction pipe;

[0031] 5. By setting the closing block and the drain port to cooperate with each other, after the refrigerant layer is discharged through the drain port, the floating plate descends and the closing block is sealed at the opening of the drain port to prevent the lubricating oil from being discharged from the drain port. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the first embodiment.

[0033] Figure 2 yes Figure 1 A partial enlarged view of part A.

[0034] Figure 3 It is a schematic structural diagram of the liquid receiving tray in the second embodiment.

[0035] Explanation of the reference numerals: 1. Liquid storage tank; 2. Liquid inlet; 3. Liquid outlet; 4. Liquid receiving tray; 5. Baffle; 6. Partition; 7. Drain; 8. Oil suction pipe; 9. Oil suction nozzle; 10. Cavity; 11. Drainage hose; 12. Oil suction port; 13. Conical protrusion; 14. Closing mechanism; 15. Fixed sleeve; 16. Sphere; 17. Through hole; 18. Floating plate; 19. Annular baffle; 20. Oil inlet; 21. Closing block; 22. Guide hole; 23. Guide rod; 24. Limit block. DETAILED DESCRIPTION

[0036] The following is combined with Figure 1-3 This application is described in further detail.

[0037] Embodiment 1: Embodiment 1 of the present application discloses a low-pressure oil separation device for a refrigeration system. Figure 1 and Figure 2 A low-pressure oil separation device for a refrigeration system includes a liquid storage tank 1, which is provided with a liquid inlet 2 and a liquid outlet 3, and also includes a liquid receiving pan 4 arranged in the liquid storage tank 1 and a baffle 5 arranged above the liquid receiving pan 4.

[0038] Among them, the liquid inlet 2 is arranged at the top of the liquid storage tank 1, and the liquid inlet 2 corresponds to the liquid receiving pan 4 in the vertical direction, the baffle 5 is located between the liquid receiving pan 4 and the liquid inlet 2 and is arranged obliquely, and a partition 6 is arranged on the lower side of the liquid receiving pan 4 close to the baffle 5, and the two ends of the partition 6 are respectively fixedly connected to the inner walls of the two sides of the liquid receiving pan 4, and the bottom end of the partition 6 is spaced from the bottom surface of the bottom of the liquid receiving pan 4. A drain port 7 is arranged at the bottom of the liquid receiving pan 4, and an oil suction pipe 8 for discharging lubricating oil is arranged on the liquid receiving pan 4, one end of the oil suction pipe 8 is connected to the inside of the liquid receiving pan 4 and the other end extends to the outside of the liquid storage tank 1.

[0039] By arranging a liquid receiving pan 4 and a baffle 5 in the liquid storage tank 1, when the oil-liquid mixture enters the liquid storage tank 1 through the liquid inlet 2, the baffle 5 buffers the oil-liquid mixture, so that the oil-liquid mixture slowly enters the liquid receiving pan 4 after passing through the baffle 5, thereby reducing the liquid level fluctuation in the liquid receiving pan 4, and a partition 6 is arranged in the liquid receiving pan 4 to make the liquid level in the liquid receiving pan 4 more stable, so that the oil suction pipe 8 can continuously and stably absorb the lubricating oil layer on the upper layer.

[0040] In order to reduce the discharge of the oil-liquid mixture through the oil suction pipe 8, an oil suction nozzle 9 is provided in the liquid collecting pan 4. The overall density of the oil suction nozzle 9 is lower than the density of the lubricating oil. The oil suction nozzle 9 is disc-shaped, and a cavity 10 is opened inside the oil suction nozzle 9. The oil suction pipe 8 is connected to the bottom of the liquid collecting pan 4. A drainage hose 11 is provided in the liquid collecting pan 4, one end of which is connected to the oil suction pipe 8. The other end of the drainage hose 11 is connected to the bottom of the oil suction nozzle 9 and is connected to the cavity 10. The side wall of the oil suction nozzle 9 is provided with a plurality of oil suction ports 12 connected to the cavity 10.

[0041] Since the overall density of the oil suction nozzle 9 is lower than the density of the lubricating oil, in the absence of external force, the oil suction nozzle 9 floats on the surface of the lubricating oil layer, and under the action of gravity, a part of the bottom of the oil suction nozzle 9 sinks into the lubricating oil layer, that is, the oil suction port 12 sinks into the lubricating oil layer, and the lubricating oil flows out of the liquid receiving pan 4 through the oil suction port 12, the cavity 10 and the drainage hose 11. When the lubricating oil layer is discharged, since the density of the refrigerant liquid layer is greater than that of the lubricating oil layer, a greater buoyancy is generated for the oil suction nozzle 9, and the position of the oil suction port 12 completely floats above the refrigerant liquid layer, so that the oil suction nozzle 9 can only discharge the lubricating oil layer.

[0042] A conical protrusion 13 is provided at the bottom of the oil suction nozzle 9 to lower the center of gravity of the entire oil suction nozzle 9, so that the state of the oil suction nozzle 9 in the liquid is more stable and is not easily affected by liquid level fluctuations.

[0043] In order to make the oil separation more thorough, a closing mechanism 14 is provided at the drain port 7 in the liquid collecting pan 4. The closing mechanism 14 includes a fixed sleeve 15 fixedly connected to the drain port 7 and communicating with the drain port 7, and a sphere 16 arranged in the fixed sleeve 15. The fixed sleeve 15 is vertically arranged and the bottom is fixedly connected to the liquid collecting pan 4. The interior of the fixed sleeve 15 is arranged in a shape with a large inner diameter in the middle and small inner diameters at both ends. The sphere 16 is located in the middle of the fixed sleeve 15, and the diameter of the sphere 16 is smaller than the inner diameters at both ends of the fixed sleeve 15. A plurality of through holes 17 connected to the inner wall of the fixed sleeve 15 are provided on the outer wall near the bottom.

[0044] When the refrigerant liquid is discharged through the drain port 7, the sphere 16 arranged in the fixed sleeve 15 is subjected to the buoyancy of the refrigerant liquid and floats to the top of the fixed sleeve 15, thereby opening the bottom opening of the fixed sleeve 15 and allowing the bottom refrigerant liquid to be discharged through the through hole 17. After the refrigerant liquid is discharged, the buoyancy of the remaining lubricating oil layer on the sphere 16 is reduced, and the sphere 16 falls to close the opening at the bottom of the fixed sleeve 15 to prevent the lubricating oil from being discharged from the drain port 7.

[0045] The implementation principle of the first embodiment of the present application is as follows: by arranging a liquid receiving pan 4 and a baffle 5 in the liquid storage tank 1, when the oil-liquid mixture enters the liquid storage tank 1 through the liquid inlet 2, the baffle 5 buffers the oil-liquid mixture, so that the oil-liquid mixture slowly enters the liquid receiving pan 4 after passing through the baffle 5, thereby reducing the liquid level fluctuation in the liquid receiving pan 4, and a partition 6 is arranged in the liquid receiving pan 4 to make the liquid surface in the liquid receiving pan 4 more stable; when the lubricating oil is discharged, since the overall density of the oil suction nozzle 9 is lower than the density of the lubricating oil, in the state without external force, the oil suction nozzle 9 floats on the surface of the lubricating oil layer, and under the action of gravity, a part of the bottom of the oil suction nozzle 9 sinks into the lubricating oil layer, that is, the oil suction port 12 sinks into the lubricating oil layer, and the lubricating oil passes through the oil suction port 12. The cavity 10 and the drainage hose 11 flow out of the liquid receiving pan 4. After the lubricating oil layer is discharged, since the density of the refrigerant liquid layer is greater than that of the lubricating oil layer, a greater buoyancy is generated on the oil suction nozzle 9. The position of the oil suction port 12 is completely floated above the refrigerant liquid layer, so that the oil suction nozzle 9 can only discharge the lubricating oil layer. When the refrigerant liquid is discharged, the sphere 16 arranged in the fixed sleeve 15 is subjected to the buoyancy of the refrigerant liquid and floats to the top of the fixed sleeve 15, thereby opening the bottom opening of the fixed sleeve 15, so that the bottom refrigerant liquid is discharged through the through hole 17. After the refrigerant liquid is discharged, the buoyancy of the remaining lubricating oil layer on the sphere 16 is reduced, and the sphere 16 falls to close the opening at the bottom of the fixed sleeve 15 to prevent the lubricating oil from being discharged from the drain port 7.

[0046] Example 2: Reference Figure 3 The difference from the first embodiment is that a floating plate 18 is provided in the liquid receiving tray 4, and the density of the floating plate 18 is set less than the density of the refrigerant and greater than the density of the lubricating oil. An annular baffle 19 is provided at the outer edge of the top surface of the floating plate 18. The outer wall of the annular baffle 19 is provided with a plurality of oil inlets 20 connected to its inner wall. One end of the drainage hose 11 is connected to the oil suction pipe 8, and the other end of the drainage hose 11 is connected to the bottom of the floating plate 18 and connected to the top surface of the floating plate 18.

[0047] Since the density of the floating plate 18 is less than the density of the refrigerant liquid and greater than the density of the lubricating oil, the floating plate 18 floats between the lubricating oil layer and the refrigerant liquid layer in the absence of external force. When the refrigerant liquid layer floats, it can drive the drainage hose 11 to move, so that the inlet end of the drainage hose 11 is always located in the lubricating oil layer, and with the cooperation of the annular baffle 19 and the floating plate 18, the part above the floating plate 18 forms a relatively stable oil storage space, so that the drainage hose 11 can discharge the lubricating oil more stably and continuously, reducing the discharge of refrigerant from the oil suction pipe 8.

[0048] In order to reduce the discharge of the oil-liquid mixture from the drain port 7, a closing block 21 is provided at the bottom of the float-sink plate 18. The closing block 21 corresponds to the drain port 7 in the vertical direction. A plurality of guide holes 22 are provided on the float-sink plate 18. A plurality of guide rods 23 extending in the vertical direction and correspondingly slidably inserted into the guide holes 22 are fixedly connected in the liquid receiving tray 4. A limit block 24 is provided at the top of each guide rod 23.

[0049] As the floating plate 18 floats on the boundary line between the lubricating oil layer and the refrigerant liquid layer due to gravity and buoyancy, after the refrigerant liquid layer is discharged through the drain port 7, the floating plate 18 descends, and with the cooperation of the guide rod 23 and the guide hole 22, the moving path and the posture of the floating plate 18 in the vertical direction are limited, so that during the falling process of the floating plate 18, the closing block 21 at the bottom can accurately correspond to the drain port 7, and finally the closing block 21 is sealed at the opening of the drain port 7 to prevent the lubricating oil from being discharged from the drain port 7.

[0050] The implementation principle of the second embodiment of the present application is: when the lubricating oil is discharged, since the density of the floating plate 18 is less than the density of the refrigerant liquid and greater than the density of the lubricating oil, the floating plate 18 floats between the lubricating oil layer and the refrigerant liquid layer without external force. When the refrigerant liquid layer floats, it can drive the drainage hose 11 to move, so that the inlet end of the drainage hose 11 is always located in the lubricating oil layer, and with the cooperation of the annular baffle 19 and the floating plate 18, the part above the floating plate 18 forms a relatively stable oil storage space, so that the drainage hose 11 can discharge the lubricating oil more stably and continuously, reducing the discharge of refrigerant from the oil suction pipe 8.

[0051] When the refrigerant is discharged, the floating plate 18 descends as the refrigerant decreases, and with the cooperation of the guide rod 23 and the guide hole 22, the moving path and the posture of the floating plate 18 in the vertical direction are limited, so that when the floating plate 18 falls, the closing block 21 at the bottom can accurately correspond to the drain port 7, and finally the closing block 21 is sealed at the opening of the drain port 7 to prevent the lubricating oil from being discharged from the drain port 7.

[0052] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A low-pressure oil separation device for a refrigeration system, comprising a liquid storage tank (1), wherein the liquid storage tank (1) is provided with a liquid inlet (2) and a liquid outlet (3), and characterized in that: It also includes a liquid receiving pan (4) arranged in the liquid storage tank (1), and a baffle (5) arranged above the liquid receiving pan (4); the liquid inlet (2) is arranged at the top of the liquid storage tank (1) and corresponds to the liquid receiving pan (4) in the vertical direction; the baffle (5) is arranged in an inclined manner; a liquid discharge port (7) is arranged at the bottom of the liquid receiving pan (4); the liquid receiving pan (4) is provided with an oil suction pipe (8) for discharging lubricating oil; one end of the oil suction pipe (8) is connected to the inside of the liquid receiving pan (4) and the other end extends to the outside of the liquid storage tank (1); The liquid receiving pan (4) is provided with a floating plate (18), the density of the floating plate (18) is less than the density of the refrigerant and greater than the density of the lubricating oil, the liquid receiving pan (4) is provided with a drainage hose (11) whose one end is connected to the oil suction pipe (8), and the other end of the drainage hose (11) is connected to the bottom of the floating plate (18) and is connected to the top surface of the floating plate (18); An annular baffle (19) is provided at the outer edge of the top surface of the floating plate (18), and the outer wall of the annular baffle (19) is provided with a plurality of oil inlets (20) connected to the inner wall thereof; A closing block (21) is provided at the bottom of the floating plate (18), and the closing block (21) corresponds to the liquid discharge port (7) in the vertical direction; a plurality of guide holes (22) are provided on the floating plate (18), and a plurality of guide rods (23) extending in the vertical direction and slidably inserted in the guide holes (22) are fixedly connected in the liquid receiving tray (4).

2. A low-pressure oil separation device for a refrigeration system according to claim 1, characterized in that: A partition plate (6) is provided on a lower side of the liquid receiving pan (4) close to the baffle plate (5), and the two ends of the partition plate (6) are respectively fixedly connected to the inner walls of the two sides of the liquid receiving pan (4), and the bottom end of the partition plate (6) is spaced apart from the bottom surface of the bottom of the liquid receiving pan (4).

3. A low-pressure oil separation device for a refrigeration system according to claim 1, characterized in that: The top ends of the guide rods (23) are each provided with a limiting block (24).

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