A freon refrigerant recycling system

Abstract

The utility model discloses a kind of freon refrigerant recycling system, comprising: evaporator is communicated with gas-liquid separator through pipeline, gas-liquid separator is communicated with first suction filter through pipeline, first suction filter is communicated with first low-pressure stage compressor through pipeline, first low-pressure stage compressor is communicated with first high-pressure stage compressor through pipeline, first high-pressure stage compressor is communicated with first oil separator through pipeline, first oil separator is connected with air cooler through pipeline, air cooler is connected with liquid reservoir through pipeline, and first oil separator is communicated with gas-liquid separator through pipeline.The utility model has advantages: the system can be parallelly connected with multiple compressor units simultaneously, closing stop valve can isolate the compressor unit to be maintained to make it stop running;Opening oil separator venting port stop valve and ninth stop valve can make the venting freon gas flow to gas-liquid separator, realize freon gas recovery, effectively save and use freon gas, while reducing the damage to the environment.

Description

Technical fields:

[0001] This utility model relates to the field of refrigerant technology, specifically to a Freon refrigerant recovery and utilization system. Background technology:

[0002] In compressor refrigeration systems, the main function of an oil separator is to separate the lubricating oil from the high-pressure gas discharged from the compressor. This allows the refrigerant to return the lubricating oil more purely to the compressor crankcase or receiver via an oil return device, preventing the lubricating oil from entering downstream components such as the condenser and evaporator, thus ensuring system efficiency and safety. However, in certain specific situations, such as during equipment maintenance, purging the refrigerant from the oil separator can prevent refrigerant leaks that could cause safety hazards or interfere with maintenance operations.

[0003] The current problem is that during compressor unit maintenance, the refrigerant in the oil-gas separator is usually released directly into the environment, which not only wastes the refrigerant but also damages the environment. At the same time, since the refrigerant is flammable, explosive, or decomposes into toxic substances at high temperatures, indiscriminate release poses a serious safety hazard to the surrounding workers.

[0004] Therefore, this application proposes a technical solution to ensure that Freon refrigerant can be effectively recovered and reused during maintenance, thereby saving production resources, reducing environmental damage, and improving operational safety. Utility model content:

[0005] The purpose of this invention is to provide a Freon refrigerant recovery and utilization system to solve the problems mentioned in the background art.

[0006] This utility model is implemented by the following technical solution:

[0007] A Freon refrigerant recovery system includes several evaporators, a gas-liquid separator, a first suction filter, a first low-pressure stage compressor, a first high-pressure stage compressor, a first oil separator, an air cooler, and a liquid receiver. The evaporators are connected to the gas-liquid separator via pipelines. The gas-liquid separator is connected to the first suction filter via pipelines. The first suction filter is connected to the first low-pressure stage compressor via pipelines. The first low-pressure stage compressor is connected to the first high-pressure stage compressor via pipelines. The first high-pressure stage compressor is connected to the first oil separator via pipelines. The first oil separator is connected to the air cooler via pipelines. The air cooler is connected to the liquid receiver via pipelines. The first oil separator is connected to the gas-liquid separator via pipelines.

[0008] Preferably, it further includes a second intake filter, a second low-pressure stage compressor, a second high-pressure stage compressor, and a second oil separator; the gas-liquid separator is connected to the second intake filter via a pipeline, the second intake filter is connected to the second low-pressure stage compressor via a pipeline, the second low-pressure stage compressor is connected to the second high-pressure stage compressor via a pipeline, the second high-pressure stage compressor is connected to the second oil separator via a pipeline, the second oil separator is connected to the gas-liquid separator via a pipeline, the second oil separator is connected to the air cooler via a pipeline, and the second oil separator is connected to the gas-liquid separator via a pipeline.

[0009] Preferably, a one-way valve and a first shut-off valve are installed on the pipeline between the gas-liquid separator and the first intake filter.

[0010] Preferably, a one-way valve and a second shut-off valve are installed on the pipeline between the gas-liquid separator and the second intake filter.

[0011] Preferably, a third shut-off valve is installed on the pipeline between the first oil separator and the air cooler.

[0012] Preferably, a fourth shut-off valve is installed on the pipeline between the second oil separator and the air cooler.

[0013] Preferably, a fifth shut-off valve and a pressure gauge are installed on the pipeline between the first oil separator and the gas-liquid separator.

[0014] Preferably, a sixth shut-off valve and a pressure gauge are installed on the pipeline between the second oil separator and the gas-liquid separator.

[0015] Preferably, the pipeline between the oil separator and the gas-liquid separator is connected to the air inlet of the vacuum pump via a first vent pipeline, and a seventh shut-off valve is installed on the first vent pipeline; one end of the first vent pipeline is connected to a second vent pipeline, and a flange blind plate is installed on the other end of the second vent pipeline, an eighth shut-off valve is installed on the second vent pipeline, and a ninth shut-off valve is installed on the pipeline between the pressure gauge and the first vent pipeline.

[0016] Preferably, the pipeline between the oil separator and the air cooler is connected to the gas-liquid separator via a bypass pipeline, and a throttling valve is installed on the bypass pipeline.

[0017] The advantages of this invention are: the system can connect multiple compressor units in parallel at the same time, and the compressor unit to be maintained is isolated and stopped from running by closing the shut-off valve. By opening the shut-off valve and the ninth shut-off valve at the oil separator vent, the vented Freon gas flows into the gas-liquid separator, realizing the process of recovering Freon gas in the system. This allows Freon gas to be effectively saved and utilized, while reducing environmental damage. Attached image description:

[0018] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0019] In the diagram: 1. Evaporator, 2. Gas-liquid separator, 3. First suction filter, 4. First low-pressure stage compressor, 5. First high-pressure stage compressor, 6. First oil separator, 7. Air cooler, 8. Receiver, 9. Second suction filter, 10. Second low-pressure stage compressor, 11. Second high-pressure stage compressor, 12. Second oil separator, 13. First vent line, 14. Vacuum pump, 15. Seventh shut-off valve, 16. Second vent line, 17. Flange blind plate, 18. Third shut-off valve, 19. Ninth shut-off valve, 20. Bypass line, 21. Throttling valve, 23. First shut-off valve, 29. Second shut-off valve, 67. Third shut-off valve, 127. Fourth shut-off valve, 62. Fifth shut-off valve, 122. Sixth shut-off valve. Detailed implementation method:

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0021] Please see Figure 1 This utility model provides a technical solution for a Freon refrigerant recovery and utilization system:

[0022] A Freon refrigerant recovery system includes several evaporators 1, a gas-liquid separator 2, a first suction filter 3, a first low-pressure stage compressor 4, a first high-pressure stage compressor 5, a first oil separator 6, an air cooler 7, and a liquid receiver 8.

[0023] The compressor unit includes: an intake filter, a low-pressure stage compressor, a high-pressure stage compressor, and an oil separator.

[0024] In this application, two compressor units are set up and connected in parallel in the system. In actual production, multiple compressor units can be connected in parallel. The specific evolution scheme can be inferred from the attached drawings in the specification, so it will not be described in detail.

[0025] Since the compressor cannot operate without liquid, the evaporator 1 is connected to the gas-liquid separator 2 via a pipeline. Freon gas is delivered to the gas-liquid separator 2 for gas-liquid separation. The gas-liquid separator 2 is connected to the first suction filter 3 via a pipeline, which filters impurities from the Freon gas. The first suction filter 3 is connected to the first low-pressure stage compressor 4 via a pipeline. The first low-pressure stage compressor 4 is connected to the first high-pressure stage compressor 5 via a pipeline, compressing the low-temperature, low-pressure gaseous Freon into a high-temperature, high-pressure gaseous Freon. The first high-pressure stage compressor 5 is connected to the first oil separator 6 via a pipeline to ensure normal compressor operation. The first oil separator 6 is connected to the air cooler 7 via a pipeline, allowing the separated gas or liquid to enter the air cooler for cooling. The air cooler 7 is connected to the liquid receiver 8 via a pipeline, where the cooled lubricating oil is stored.

[0026] It also includes a second intake filter 9, a second low-pressure stage compressor 10, a second high-pressure stage compressor 11, and a second oil separator 12; the gas-liquid separator 2 is connected to the second intake filter 9 through a pipeline, the second intake filter 9 is connected to the second low-pressure stage compressor 10 through a pipeline, the second low-pressure stage compressor 10 is connected to the second high-pressure stage compressor 11 through a pipeline, the second high-pressure stage compressor 11 is connected to the second oil separator 12 through a pipeline, and the second oil separator 12 is connected to the air cooler 7 through a pipeline.

[0027] A one-way valve and a first shut-off valve 23 are installed on the pipeline between the gas-liquid separator 2 and the first intake filter 3.

[0028] A check valve and a second shut-off valve 29 are installed on the pipeline between the gas-liquid separator 2 and the second intake filter 9.

[0029] A third shut-off valve 67 is installed on the pipeline between the first oil separator 6 and the air cooler 7.

[0030] A fourth shut-off valve 127 is installed on the pipeline between the second oil separator 12 and the air cooler 7.

[0031] A fifth shut-off valve 62 and a pressure gauge 30 are installed on the pipeline between the first oil separator 6 and the gas-liquid separator 2.

[0032] A sixth shut-off valve 122 and a pressure gauge 30 are installed on the pipeline between the second oil separator 12 and the gas-liquid separator 2.

[0033] The pipeline between the oil separator and the gas-liquid separator 2 is connected to the air inlet of the vacuum pump 14 via the first vent line 13. A seventh shut-off valve 15 is installed on the first vent line 13. One end of the first vent line 13 is connected to the second vent line 16. A flange blind plate 17 is installed on the other end of the second vent line 16. An eighth shut-off valve 18 is installed on the second vent line 16. A ninth shut-off valve 19 is installed on the pipeline between the pressure gauge 30 and the first vent line 13.

[0034] The pipeline between the oil separator 6 and the air cooler 7 is connected to the gas-liquid separator 2 via a bypass pipeline 20, and a throttle valve 21 is installed on the bypass pipeline 20.

[0035] To avoid refrigerant waste during compressor maintenance, the first oil separator 6 is connected to the gas-liquid separator 2 via a pipeline, and the second oil separator 12 is connected to the gas-liquid separator 2 via a pipeline.

[0036] During the operation of the compressor unit, all valves except vacuum pump 14, seventh shut-off valve 15, eighth shut-off valve 18 and ninth shut-off valve 19 are in the open state.

[0037] Based on the above, the working principle of this system during the compressor unit maintenance process is as follows:

[0038] Taking the overhaul of the first low-pressure stage compressor 4 and the first high-pressure stage compressor 5 as an example, when overhauling the first low-pressure stage compressor 4 and the first high-pressure stage compressor 5, the first shut-off valve 23 and the third shut-off valve 67 are closed, isolating and ceasing operation of this part of the compressor unit. At this time, the gas pressure in the first oil separator 6 is 0.7MPa-1MPa, while the gas pressure in the gas-liquid separator 2 is 0MPa-0.1MPa. The fifth shut-off valve 62 and the ninth shut-off valve 19 at the vent of the first oil separator 6 are opened, allowing the vented Freon gas to flow into the gas-liquid separator 2, realizing the process of recovering Freon gas in the system, thus effectively saving and utilizing Freon gas, while reducing environmental damage. By observing the pressure change of the pressure gauge 30, when the pressure gauge 30 no longer changes, the fifth shut-off valve 62 and the ninth shut-off valve 19 at the vent of the first oil separator 6 are closed, and the overhaul process begins.

[0039] After the overhaul is completed, before the compressor is put into trial operation, because the compressor contains air, the fifth shut-off valve 62, the seventh shut-off valve 15 and the vacuum pump 14 need to be opened. The air in the compressor under overhaul is extracted through the pipeline by the vacuum pump 14 and discharged. After discharge, the fifth shut-off valve 62, the seventh shut-off valve 15 and the vacuum pump 14 are closed so that the compressor can be put into normal use.

[0040] When overhauling the second low-pressure stage compressor 10 and the second high-pressure stage compressor 11, the operation process is basically the same as described above. Close the second shut-off valve 29 and the fourth shut-off valve 127 to isolate and stop the operation of this part of the compressor unit. At this time, the gas pressure in the second oil separator 12 is 0.7MPa-1MPa, while the gas pressure in the gas-liquid separator 2 is 0MPa-0.1MPa. Open the sixth shut-off valve 122 and the ninth shut-off valve 19 at the vent of the second oil separator 12, allowing the vented Freon gas to flow into the gas-liquid separator 2, realizing the system's Freon gas recovery process. This effectively saves and utilizes Freon gas while reducing environmental damage. Observe the pressure change on the pressure gauge 30. When the pressure gauge 30 no longer changes, close the sixth shut-off valve 122 and the ninth shut-off valve 19 at the vent of the second oil separator 12 to begin the overhaul process.

[0041] After the overhaul is completed, before the compressor is put into trial operation, because the compressor contains air, the sixth shut-off valve 122, the seventh shut-off valve 15 and the vacuum pump 14 need to be opened. The air in the compressor under overhaul is extracted through the pipeline by the vacuum pump 14 and discharged. After discharge, the sixth shut-off valve 122, the seventh shut-off valve 15 and the vacuum pump 14 are closed so that the compressor can be put into normal use.

[0042] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A system for recovering and utilizing Freon refrigerant, characterized in that: It includes several evaporators (1), gas-liquid separators (2), a first suction filter (3), a first low-pressure stage compressor (4), a first high-pressure stage compressor (5), a first oil separator (6), an air cooler (7), and a liquid receiver (8); the evaporators (1) are connected to the gas-liquid separators (2) via pipelines, the gas-liquid separators (2) are connected to the first suction filter (3) via pipelines, the first suction filter (3) is connected to the first low-pressure stage compressor (4) via pipelines, the first low-pressure stage compressor (4) is connected to the first high-pressure stage compressor (5) via pipelines, the first high-pressure stage compressor (5) is connected to the first oil separator (6) via pipelines, the first oil separator (6) is connected to the air cooler (7) via pipelines, and the air cooler (7) is connected to the liquid receiver (8) via pipelines; the first oil separator (6) is connected to the gas-liquid separators (2) via pipelines.

2. The Freon refrigerant recovery and utilization system according to claim 1, characterized in that: It also includes a second intake filter (9), a second low-pressure stage compressor (10), a second high-pressure stage compressor (11), and a second oil separator (12); the gas-liquid separator (2) is connected to the second intake filter (9) through a pipeline, the second intake filter (9) is connected to the second low-pressure stage compressor (10) through a pipeline, the second low-pressure stage compressor (10) is connected to the second high-pressure stage compressor (11) through a pipeline, the second high-pressure stage compressor (11) is connected to the second oil separator (12) through a pipeline, the second oil separator (12) is connected to the gas-liquid separator (2) through a pipeline, the second oil separator (12) is connected to the air cooler (7) through a pipeline, and the second oil separator (12) is connected to the gas-liquid separator (2) through a pipeline.

3. The Freon refrigerant recovery and utilization system according to claim 1, characterized in that: A one-way valve and a first shut-off valve (23) are installed on the pipeline between the gas-liquid separator (2) and the first intake filter (3).

4. A Freon refrigerant recovery and utilization system according to claim 2, characterized in that: A one-way valve and a second shut-off valve (29) are installed on the pipeline between the gas-liquid separator (2) and the second intake filter (9).

5. A Freon refrigerant recovery and utilization system according to claim 3, characterized in that: A third shut-off valve (67) is installed on the pipeline between the first oil separator (6) and the air cooler (7).

6. A Freon refrigerant recovery and utilization system according to claim 4, characterized in that: A fourth shut-off valve (127) is installed on the pipeline between the second oil separator (12) and the air cooler (7).

7. A Freon refrigerant recovery and utilization system according to claim 5, characterized in that: A fifth shut-off valve (62) and a pressure gauge (30) are installed on the pipeline between the first oil separator (6) and the gas-liquid separator (2).

8. A Freon refrigerant recovery and utilization system according to claim 6, characterized in that: A sixth shut-off valve (122) and a pressure gauge (30) are installed on the pipeline between the second oil separator (12) and the gas-liquid separator (2).

9. A Freon refrigerant recovery and utilization system according to claim 7 or 8, characterized in that: The pipeline between the oil separator and the gas-liquid separator (2) is connected to the inlet of the vacuum pump (14) via the first vent line (13). A seventh shut-off valve (15) is installed on the first vent line (13). One end of the first vent line (13) is connected to one end of the second vent line (16). A flange blind plate (17) is installed on the other end of the second vent line (16). An eighth shut-off valve (18) is installed on the second vent line (16). A ninth shut-off valve (19) is installed on the pipeline between the pressure gauge (30) and the first vent line (13).

10. A Freon refrigerant recovery and utilization system according to claim 9, characterized in that: The pipeline between the oil separator and the air cooler (7) is connected to the gas-liquid separator (2) via a bypass pipeline (20), and a throttle valve (21) is installed on the bypass pipeline (20).

Images