Built-in oil separation and gas separation combined structure with heat exchange function

Abstract

The utility model discloses a built-in oil separation and gas separation combined structure with heat exchange function, which comprises a gas-liquid separation unit and an oil separation unit, the gas-liquid separation unit comprises an upper end cover, a shell body and a lower end cover, the upper end cover, the shell body and the lower end cover are encircled to form a gas-liquid separation space, the gas-liquid separation space is used for gas-liquid separation, and the oil separation unit is arranged in the gas-liquid separation space. The oil separation unit is provided with an oil-gas separation space, the oil-gas separation space is used for oil-gas separation, the oil separation unit is arranged in the gas-liquid separation unit and located in the gas-liquid separation space, and through combination of the gas-liquid separation unit and the oil separation unit, the gas-liquid separation unit and the oil separation unit do not need to be connected through a connecting pipeline, so that the occupied space is reduced; meanwhile, by combining the gas-liquid separation unit and the oil separation unit, the low-temperature refrigerant in the gas-liquid separation unit can exchange heat with the high-temperature refrigerant in the oil separation unit, so that the low-temperature refrigerant is completely gaseous, and the liquid impact phenomenon caused by the fact that the compressor sucks the liquid refrigerant is avoided.

Description

Technical Field

[0001] This utility model belongs to the field of refrigeration technology, and in particular relates to a structure that combines built-in oil separator and gas separator with heat exchange. Background Technology

[0002] The heart of an air conditioning system is the compressor, and the gas-liquid separator is typically installed on the low-pressure pipe between the compressor and the four-way valve. The function of the gas-liquid separator is to separate and retain the liquid refrigerant in the return pipe, preventing liquid slugging in the compressor. The gas-liquid separator protects the compressor, hence its widespread use in air conditioning systems. A suitable gas-liquid separator can effectively protect the compressor, improve system reliability, extend the length of connectable piping, and enhance the competitiveness of the air conditioner.

[0003] The oil return problem has always been one of the key factors restricting the development of air conditioning systems that often use multi-compressor parallel systems. Therefore, it is necessary to add gas-liquid separators and oil separators to the refrigeration system to protect it. However, in the existing technology, the gas-liquid separator and oil separator are installed separately, and complex connecting pipes are required between them. This not only increases the manufacturing cost but also occupies a large space, making it inconvenient to use in small air conditioning units. Utility Model Content

[0004] The purpose of this invention is to solve the aforementioned technical problems in the prior art and to provide a structure that combines heat exchange with built-in oil and gas separation. By combining the gas-liquid separation unit and the oil separation unit, the gas-liquid separation unit and the oil separation unit do not need to be connected by connecting pipes, thus reducing the space occupied. At the same time, by combining the two, the low-temperature refrigerant in the gas-liquid separation unit can exchange heat with the high-temperature refrigerant in the oil separation unit, so that the low-temperature refrigerant is completely gaseous, avoiding liquid slugging caused by the compressor drawing in liquid refrigerant.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A structure combining built-in oil and gas separators with heat exchange capabilities, characterized by: comprising...

[0007] The gas-liquid separation unit includes an upper end cover, a shell, and a lower end cover. The upper end cover, the shell, and the lower end cover together form a gas-liquid separation space, which is used for gas-liquid separation.

[0008] The oil separation unit is equipped with an oil-gas separation space for oil-gas separation. The oil separation unit is located within the gas-liquid separation unit and within the gas-liquid separation space.

[0009] By combining the gas-liquid separation unit and the oil separation unit, the gas-liquid separation unit and the oil separation unit do not need to be connected by connecting pipes, which reduces the space occupied. At the same time, by combining the two, the low-temperature refrigerant in the gas-liquid separation unit can exchange heat with the high-temperature refrigerant in the oil separation unit, so that the low-temperature refrigerant is completely gaseous, avoiding liquid slugging caused by the compressor drawing in liquid refrigerant.

[0010] Furthermore, the upper end cover, the shell body, and the lower end cover are welded together to form a gas-liquid separation unit. Both the upper end cover and the lower end cover are provided with a first welding part. The two ends of the shell body are inserted into the upper end cover and the lower end cover and welded and fixed with the first welding part.

[0011] Furthermore, the gas-liquid separation unit also includes a first liquid inlet pipe and a first gas outlet pipe. The first liquid inlet pipe is connected to the gas-liquid separation space, with one end extending out of the gas-liquid separation space and welded to the upper end cover. The first gas outlet pipe is installed in the gas-liquid separation space, with one end extending out of the gas-liquid separation space and welded to the upper end cover.

[0012] Furthermore, the first liquid inlet pipe has a liquid inlet at one end extending out of the gas-liquid separation space, the first gas outlet pipe has an air inlet at one end located in the gas-liquid separation space, and the first gas outlet pipe has an air outlet at one end extending out of the gas-liquid separation space.

[0013] Furthermore, the first exhaust pipe includes an intake section, a connecting section, and an exhaust section. The intake section is located in the gas-liquid separation space, and the intake port is opened on the intake section. The exhaust section passes through the upper end cover, and the exhaust port is opened on the exhaust section. The connecting section is used to connect the intake section and the exhaust section.

[0014] Furthermore, the first exhaust pipe is equipped with an oil return hole and a pressure equalization hole. The oil return hole is located on the connecting section and a filter screen is installed in the oil return hole. The pressure equalization hole is located on the exhaust section.

[0015] Furthermore, the oil separation unit includes a housing, a second liquid inlet pipe, a second gas outlet pipe, and a liquid outlet pipe. The housing forms a gas-liquid separation space, and the second liquid inlet pipe, the second gas outlet pipe, and the liquid outlet pipe are all connected to the gas-liquid separation space.

[0016] Furthermore, the shell is installed in the gas-liquid separation space. Both ends of the shell are provided with a second welding part, which penetrates the upper end cover and the lower end cover. One end of the shell is welded to the second gas outlet pipe through the second welding part, and the other end of the shell is welded to the liquid outlet pipe through the second welding part. The second liquid inlet pipe is set on the shell and communicates with the gas-liquid separation space. The second liquid inlet pipe is welded to the shell body.

[0017] Furthermore, the shell has a cylindrical structure with narrowed ends.

[0018] This utility model, by adopting the above-mentioned technical solution, has the following beneficial effects:

[0019] In this invention, the gas-liquid separation unit includes an upper cover, a shell, and a lower cover. The upper cover, shell, and lower cover together form a gas-liquid separation space, which is used for gas-liquid separation. The oil separation unit has an oil-gas separation space, which is used for oil-gas separation. The oil separation unit is located inside the gas-liquid separation unit and within the gas-liquid separation space, or the oil separation unit is sleeved outside the gas-liquid separation unit. By combining the gas-liquid separation unit and the oil separation unit, it is not necessary to connect the gas-liquid separation unit and the oil separation unit through connecting pipes, thus reducing the space occupied. At the same time, by combining the two, the low-temperature refrigerant in the gas-liquid separation unit can exchange heat with the high-temperature refrigerant in the oil separation unit, so that the low-temperature refrigerant is completely gaseous, avoiding liquid slugging caused by the compressor drawing in liquid refrigerant. Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of a first embodiment of the present invention, which combines heat exchange with built-in oil and gas separation.

[0022] Figure 2 This utility model Figure 1 A magnified view of a section at point A in the middle;

[0023] Figure 3 This is a top view of a structure combining built-in oil and gas separators that integrates heat exchange according to this utility model.

[0024] In the diagram: 1-Gas-liquid separation unit; 2-Upper end cover; 3-Shell body; 4-Lower end cover; 5-Gas-liquid separation space; 6-Oil separation unit; 7-Oil-gas separation space; 8-First welded part; 9-First liquid inlet pipe; 10-First gas outlet pipe; 11-Liquid inlet; 12-Gas inlet; 13-Gas outlet; 14-Shell body; 15-Second liquid inlet pipe; 16-Second gas outlet pipe; 17-Liquid outlet pipe; 18-Second welded part; 19-Gas inlet section; 20-Connecting section; 21-Gas outlet section; 22-Oil return hole; 23-Pressure equalization hole; 24-Filter screen. Detailed Implementation

[0025] like Figures 1 to 3 As shown, this utility model discloses a built-in oil and gas separator structure that combines heat exchange, including a gas-liquid separation unit 1 and an oil separation unit 6. The gas-liquid separation unit 1 includes an upper end cover 2, a shell 3, and a lower end cover 4. The upper end cover 2, the shell 3, and the lower end cover 4 together form a gas-liquid separation space 5, which is used for gas-liquid separation. The oil separation unit 6 is provided with an oil-gas separation space 7, which is used for oil-gas separation. The oil separation unit 6 is disposed inside the gas-liquid separation unit 1 and located in the gas-liquid separation space 5.

[0026] This invention combines a gas-liquid separation unit 1 and an oil separation unit 6, eliminating the need for connecting pipes between them and reducing space requirements. Furthermore, by combining the two, the low-temperature refrigerant in the gas-liquid separation unit 1 can exchange heat with the high-temperature refrigerant in the oil separation unit 6, causing the low-temperature refrigerant to heat up and vaporize, thus preventing liquid slugging caused by the compressor drawing in liquid refrigerant.

[0027] In this embodiment, the shell 3 has a cylindrical structure. The upper end cover 2 and the lower end cover 4 are flared outward to form a first welding part 8. The two ends of the shell 3 are inserted into the upper end cover 2 and the lower end cover 4 and welded to the first welding part 8. The two ends of the shell 3 are welded to the upper end cover 2 and the lower end cover 4 to form a gas-liquid separation unit 1. The first welding part 8 is provided to avoid the formation of gaps after the gas-liquid separation unit 1 is welded.

[0028] The gas-liquid separation unit 1 also includes a first inlet pipe 9 and a first outlet pipe 10. The first inlet pipe 9 is installed in and communicates with the gas-liquid separation space 5. The other end of the first inlet pipe 9 extends out of the gas-liquid separation space 5 and is welded to the upper end cover 2. The end of the first inlet pipe 9 extending out of the gas-liquid separation space 5 is provided with an inlet port 11. The first outlet pipe 10 is provided with an inlet port 12 and an outlet port 13. The first outlet pipe 10 includes an inlet section 19, a connecting section 20, and an outlet section 2. 1. The air inlet section 19 and the air outlet section 21 are connected by the connecting section 20. The air inlet section 19 is located in the gas-liquid separation space 5 and is connected to the gas-liquid separation space 5. The air inlet 12 is opened on the air inlet section 19. The air outlet section 21 extends through the upper end cover 2, extends out of the gas-liquid separation space 5 and is welded to the upper end cover 2. The air outlet 13 is opened on the air outlet section 21. The height of the air inlet 12 is higher than the height of the refrigerant entering the gas-liquid separation space 5 to prevent the liquid refrigerant from entering the first air outlet pipe 10.

[0029] The first exhaust pipe is provided with an oil return hole 22 and a pressure equalization hole 23. The oil return hole 22 is located on the connecting section 20, and a filter screen 24 is installed in the oil return hole 22. The pressure equalization hole 23 is opened on the exhaust section 21. The setting of the pressure equalization hole 23 can prevent impurities from being blocked by the filter screen 24 when the compressor is not running. The setting of the oil return hole 22 can ensure that the refrigeration oil can return to the compressor as much as possible.

[0030] The oil separation unit 6 includes a housing 14, a second liquid inlet pipe 15, a second gas outlet pipe 16, and a liquid outlet pipe 17. The housing 14 has a cylindrical structure with narrow ends. In this embodiment, the housing 14 itself forms an oil-gas separation space 7. The second liquid inlet pipe 15, the second gas outlet pipe 16, and the liquid outlet pipe 17 are all connected to the gas-liquid separation space 5.

[0031] The housing 14 is installed in the gas-liquid separation space 5. In this embodiment, the oil separation unit 6 is located inside the gas-liquid separation unit 1. Both ends of the housing 14 are narrowed to form a second welding part 18. The second welding parts 18 at both ends of the housing 14 pass through the upper end cover 2 and the lower end cover 4. One end of the housing 14 is welded to the second gas outlet pipe 16 through the second welding part 18, and the other end of the housing 14 is welded to the liquid outlet pipe 17 through the second welding part 18. The second liquid inlet pipe 15 is provided on the housing 14 and communicates with the gas-liquid separation space 5. The second liquid inlet pipe 15 is welded to the shell body 3.

[0032] In this invention, the low-temperature gas-liquid two-phase refrigerant from the evaporator enters the gas-liquid separation space 5 through the inlet 11 and the first inlet pipe 9, while the high-temperature gas-liquid two-phase refrigerant enters the oil-gas separation space 7 through the second inlet pipe 15. Through the combined design of the gas-liquid separation unit 1 and the oil separation unit 6, the low-temperature gas-liquid two-phase refrigerant in the gas-liquid separation space 5 and the high-temperature gas-liquid two-phase refrigerant in the oil-gas separation space 7 exchange heat through conduction. After entering the oil-gas separation space 7, the high-temperature gas-liquid two-phase refrigerant undergoes gas-liquid separation due to gravity. The separated gas is discharged through the second outlet pipe 16. After heat exchange, the temperature of the high-temperature liquid refrigerant in the oil-gas separation space 7 is effectively reduced. Then, it enters the condenser through the liquid outlet pipe 17 to increase the heat exchange performance. The low-temperature gas-liquid two-phase refrigerant in the gas-liquid separation space 5 evaporates into a gaseous state after heat exchange. It is then drawn into the compressor through the first outlet pipe 10, which prevents the compressor from drawing in liquid refrigerant and avoids liquid slugging. At the same time, the overheated gaseous state reduces the compressor's work and reduces power loss.

[0033] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A structure combining built-in oil and gas separators with heat exchange capabilities, characterized in that: include A gas-liquid separation unit, comprising an upper end cover, a shell, and a lower end cover, wherein the upper end cover, the shell, and the lower end cover together form a gas-liquid separation space, which is used for gas-liquid separation; An oil separation unit is provided, wherein the oil separation unit is provided with an oil-gas separation space, the oil-gas separation space is used for oil-gas separation, and the oil separation unit is disposed within the gas-liquid separation unit and located in the gas-liquid separation space.

2. The structure of a built-in oil separator and gas separator with heat exchange as described in claim 1, characterized in that: The upper end cover, the shell body, and the lower end cover are welded together to form the gas-liquid separation unit. Both the upper end cover and the lower end cover are provided with a first welding part. The two ends of the shell body are inserted into the upper end cover and the lower end cover and welded and fixed with the first welding part.

3. The structure of a built-in oil separator and gas separator with heat exchange as described in claim 1, characterized in that: The gas-liquid separation unit further includes a first liquid inlet pipe and a first gas outlet pipe. The first liquid inlet pipe is connected to the gas-liquid separation space. One end of the first liquid inlet pipe extends out of the gas-liquid separation space and is welded and fixed to the upper end cover. The first gas outlet pipe is installed in the gas-liquid separation space. One end of the first gas outlet pipe extends out of the gas-liquid separation space and is welded to the upper end cover.

4. The structure of a built-in oil separator and gas separator with heat exchange as described in claim 3, characterized in that: The first liquid inlet pipe has a liquid inlet at one end extending out of the gas-liquid separation space, the first gas outlet pipe has a gas inlet at one end located in the gas-liquid separation space, and the first gas outlet pipe has a gas outlet at one end extending out of the gas-liquid separation space.

5. The structure of a built-in oil separator and gas separator with heat exchange as described in claim 4, characterized in that: The first air outlet pipe includes an air inlet section, a connecting section, and an air outlet section. The air inlet section is located in the gas-liquid separation space, and the air inlet is opened on the air inlet section. The air outlet section passes through the upper end cover, and the air outlet is opened on the air outlet section. The connecting section is used to connect the air inlet section and the air outlet section.

6. The structure of a built-in oil separator and gas separator with heat exchange as described in claim 5, characterized in that: The first air outlet pipe is provided with an oil return hole and a pressure equalization hole. The oil return hole is located on the connecting section and a filter screen is installed in the oil return hole. The pressure equalization hole is opened on the air outlet section.

7. The structure of a built-in oil separator and gas separator with heat exchange as described in claim 1, characterized in that: The oil separation unit includes a housing, a second liquid inlet pipe, a second gas outlet pipe, and a liquid outlet pipe. The housing forms the gas-liquid separation space, and the second liquid inlet pipe, the second gas outlet pipe, and the liquid outlet pipe are all connected to the gas-liquid separation space.

8. The structure of a built-in oil separator and gas separator with heat exchange as described in claim 7, characterized in that: The housing is installed in the gas-liquid separation space. Both ends of the housing are provided with a second welding part, which penetrates the upper end cover and the lower end cover. One end of the housing is welded to the second gas outlet pipe through the second welding part, and the other end of the housing is welded to the liquid outlet pipe through the second welding part. The second liquid inlet pipe is provided on the housing and communicates with the gas-liquid separation space. The second liquid inlet pipe is welded to the housing body.

9. The structure of a built-in oil separator and gas separator with heat exchange as described in claim 7, characterized in that: The shell has a cylindrical structure with narrow ends.

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