CN108168166B - Low-temperature auxiliary refrigerant recovery system - Google Patents
Low-temperature auxiliary refrigerant recovery system Download PDFInfo
- Publication number
- CN108168166B CN108168166B CN201810103120.2A CN201810103120A CN108168166B CN 108168166 B CN108168166 B CN 108168166B CN 201810103120 A CN201810103120 A CN 201810103120A CN 108168166 B CN108168166 B CN 108168166B
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- Prior art keywords
- pipeline
- refrigerant
- valve
- electromagnetic valve
- heat exchanger
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- 239000003507 refrigerant Substances 0.000 title claims abstract description 66
- 238000011084 recovery Methods 0.000 title claims abstract description 20
- 238000005086 pumping Methods 0.000 claims abstract description 9
- 239000007788 liquid Substances 0.000 claims description 19
- 238000004378 air conditioning Methods 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 claims description 6
- 239000011521 glass Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B45/00—Arrangements for charging or discharging refrigerant
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
- F25B43/02—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat for separating lubricants from the refrigerant
Abstract
The invention discloses a low-temperature auxiliary refrigerant recovery system, which comprises a refrigerant pumping device, a refrigerant liquefying device and a refrigerant collecting device, wherein the refrigerant pumping device is connected with an air conditioner refrigerating unit, the refrigerant pumping device comprises an inlet main pipeline connected with the air conditioner refrigerating unit, a pipeline I, a pipeline II and a pipeline III which are arranged in parallel, and a pipeline IV connected with the refrigerant liquefying device, a hand valve I, a dry filter, an oil separator I, an inlet pressure control device and a main electromagnetic valve are arranged on the inlet main pipeline, a pressure control device I, an electromagnetic valve I and a compressor I are arranged on the pipeline I, an electromagnetic valve II and a one-way valve I are arranged on the pipeline II, and an electromagnetic valve III and a pneumatic pump I are arranged on the pipeline III; the refrigerant liquefying device comprises a heat exchanger and a refrigerating system connected with the heat exchanger; the recovery system disclosed by the invention can reduce the temperature in the heat exchanger to minus 20 ℃, and the refrigerant can be successfully liquefied and recovered, so that the recovery system has a good market application prospect.
Description
Technical Field
The present invention relates to a refrigerant recovery system, and more particularly, to a low-temperature auxiliary refrigerant recovery system.
Background
In general, the principle of recovering refrigerant is to suck the refrigerant in an air conditioning refrigeration unit using a compressor (or pump), then cool the refrigerant in an air-cooled condenser or a water-cooled condenser, and then liquefy the refrigerant in a storage cylinder. However, when some medium-high pressure refrigerant with a low critical temperature and a high critical pressure is recovered, if the critical temperature of R508B is 23.6 ℃, the critical pressure is 4060KPa, and the R508B cannot be liquefied by ordinary air cooling (condensing temperature is about 40 ℃) or water cooling (condensing temperature is about 12 ℃ to 20 ℃). Meanwhile, because the critical pressure is high when compressed using a common compressor, the discharge pressure will be far beyond the upper pressure limit that the compressor can withstand. Therefore, there is a need for a recovery system that can liquefy refrigerant R508B using a common compressor.
Disclosure of Invention
In order to solve the technical problems, the invention provides a low-temperature auxiliary refrigerant recovery system so as to achieve the purposes that the low temperature of minus 20 ℃ can be prepared through a refrigeration system and the medium-high pressure refrigerant can be successfully liquefied and recovered.
In order to achieve the above purpose, the technical scheme of the invention is as follows:
the low-temperature auxiliary refrigerant recovery system comprises a refrigerant pumping device, a refrigerant liquefying device and a refrigerant collecting device, wherein the refrigerant pumping device is connected with an air conditioning refrigerating unit, the refrigerant pumping device comprises an inlet main pipeline connected with the air conditioning refrigerating unit, a pipeline I, a pipeline II and a pipeline III which are arranged in parallel, and a pipeline IV connected with the refrigerant liquefying device, a hand valve I, a dry filter, an oil separator I, an inlet pressure control device and a main electromagnetic valve which is electrically connected with the inlet pressure control device are arranged on the inlet main pipeline, a pressure control device I, an electromagnetic valve I and a compressor I are arranged on the pipeline I, an electromagnetic valve II and a one-way valve I are arranged on the pipeline II, an electromagnetic valve III and a pneumatic pump I are arranged on the pipeline III, and a high-pressure control device I is electrically connected with the electromagnetic valve I, the compressor I, the electromagnetic valve II and the electromagnetic valve III through a control system; the refrigerant liquefying device comprises a heat exchanger and a refrigerating system connected with the heat exchanger, and a liquid level meter extending into the heat exchanger is arranged at the top of the heat exchanger; the refrigerant collecting device comprises a solenoid valve IV and a pneumatic pump II which are connected to the bottom of the heat exchanger, and the liquid level meter is electrically connected with the solenoid valve IV and the pneumatic pump II through a control system.
In the scheme, the refrigerating system comprises a gas-liquid separator, a second compressor, a second oil separator, a condenser, a filter and an expansion valve, wherein the gas-liquid separator, the second compressor, the second oil separator, the condenser, the filter and the expansion valve are connected with the heat exchanger, and the bottom of the second oil separator is connected with the second compressor through an oil pipeline.
In the scheme, the temperature sensing bag of the expansion valve is tightly attached to an air outlet pipe connected with the heat exchanger in the refrigerating system.
In the above scheme, the front side and the rear side of the second compressor are respectively provided with the first low-pressure gauge and the first high-pressure gauge, and the two ends of the second compressor are connected in parallel with the second pressure control device.
In the scheme, the refrigerant collecting device further comprises a first dry-wet degree sight glass, a second check valve, a second high-pressure control device, a second high-pressure meter and a second hand valve which are connected with the second pneumatic pump.
In the scheme, a second humidity mirror is arranged between the filter and the expansion valve.
In the scheme, the first pneumatic pump and the second pneumatic pump are respectively connected with the pneumatic triple piece through the electromagnetic valve five and the electromagnetic valve six.
In the scheme, the bottom of the oil separator is connected with an oil discharge pipeline, and the oil discharge pipeline is provided with a third wet degree viewing mirror and an oil discharge valve.
In the scheme, a safety valve, a third high-pressure gauge and a manual pressure relief valve are arranged at the top of the heat exchanger.
Through the technical scheme, the low-temperature auxiliary refrigerant recovery system provided by the invention can reduce the temperature in the heat exchanger to minus 20 ℃ by utilizing the refrigeration system, and the refrigerant can be successfully liquefied and recovered. Meanwhile, when the inlet pipeline which is arranged in parallel is used for recycling, different electromagnetic valves are opened by setting the set pressure value of the pressure control device, so that the flow route of the refrigerant can be controlled, the energy consumption can be saved, the first pneumatic pump and the first compressor are protected, the first pneumatic pump and the first compressor can work normally, the service life is prolonged, and the pressure of the refrigerant entering the heat exchanger can be accurately controlled. The pressure, temperature, refrigerant flow and humidity of the whole recovery system are controllable, and the method has good market application prospect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic diagram of a low-temperature auxiliary refrigerant recovery system according to an embodiment of the present invention.
In the figure, 1, an inlet main pipeline; 2. a first pipeline; 3. a second pipeline; 4. a third pipeline; 5. a fourth pipeline; 6. a first hand valve; 7. drying the filter; 8. an oil separator I; 9. inlet pressure control means; 10. a high-voltage meter IV; 11. a main electromagnetic valve; 12. a first pressure control device; 13. a first electromagnetic valve; 14. a first compressor; 15. a second electromagnetic valve; 16. a first check valve; 17. a third electromagnetic valve; 18. a first pneumatic pump; 19. a first high-voltage control device; 20. a third dry-wet mirror; 21. an oil discharge valve; 22. a heat exchanger; 23. a liquid level gauge; 24. a safety valve; 25. a third high-pressure gauge; 26. a manual pressure release valve; 27. a gas-liquid separator; 28. a second compressor; 29. an oil separator II; 30. a condenser; 31. a filter; 32. a second humidity mirror; 33. an expansion valve; 34. a temperature sensing bag; 35. a thermometer; 36. a low pressure gauge; 37. a high-voltage meter I; 38. a second pressure control device; 39. a fourth electromagnetic valve; 40. a pneumatic pump II; 41. a first dry-wet mirror; 42. a second check valve; 43. a second high-voltage control device; 44. a second high-voltage meter; 45. a second hand valve; 46. a fifth electromagnetic valve; 47. a sixth electromagnetic valve; 48. pneumatic triplet.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The invention provides a low-temperature auxiliary refrigerant recovery system, which is shown in figure 1 and comprises a refrigerant pump-out device, a refrigerant liquefying device and a refrigerant collecting device which are connected with an air conditioner refrigerating unit.
The refrigerant pump-out device comprises an inlet main pipeline 1 connected with the air conditioning refrigerating unit, a pipeline I2, a pipeline II 3 and a pipeline III 4 which are arranged in parallel, and a pipeline IV 5 connected with the refrigerant liquefying device. The inlet main pipeline 1 is provided with a first hand valve 6, two dry filters 7, a first oil separator 8, an inlet pressure control device 9, a fourth high-pressure gauge 10 and a main electromagnetic valve 11 electrically connected with the inlet pressure control device 9; the first pipeline 2 is provided with a first pressure control device 12, a first electromagnetic valve 13 and a first compressor 14, the second pipeline 3 is provided with a second electromagnetic valve 15 and a first check valve 16, the third pipeline 4 is provided with a third electromagnetic valve 17 and a first pneumatic pump 18, the fourth pipeline 5 is provided with a first high-pressure control device 19, and the first pressure control device 12 is electrically connected with the first electromagnetic valve 13, the first compressor 14, the second electromagnetic valve 15 and the third electromagnetic valve 17 through a control system. The bottom of the first oil separator 8 is connected with an oil discharge pipeline, and the oil discharge pipeline is provided with a third wet degree sight glass 20 and an oil discharge valve 21.
The refrigerant liquefying device comprises a heat exchanger 22 and a refrigerating system connected with the heat exchanger 22, and a liquid level meter 23 extending into the heat exchanger is arranged at the top of the heat exchanger 22; the top of the heat exchanger 22 is provided with a safety valve 24, a third high-pressure gauge 25 and a manual pressure relief valve 26.
The refrigerating system comprises a gas-liquid separator 27, a second compressor 28, a second oil separator 29, a condenser 30, a filter 31, a second dry-wet-degree viewing mirror 32 and an expansion valve 33 which are connected with the heat exchanger 22, wherein the bottom of the second oil separator 29 is connected with the second compressor 28 through an oil pipeline. The temperature sensing bulb 34 of the expansion valve 33 is closely attached to an air outlet pipe connected with the heat exchanger 22 in the refrigerating system. A thermometer 35 is arranged on the air outlet pipe of the heat exchanger 22. The front and rear sides of the second compressor 28 are respectively provided with a low-pressure gauge 36 and a high-pressure gauge 37, and two ends of the second compressor 28 are connected in parallel with a second pressure control device 38.
The refrigerant collecting device comprises a fourth electromagnetic valve 39, a second pneumatic pump 40, a first dry-wet view mirror 41, a second check valve 42, a second high-pressure control device 43, a second high-pressure meter 44 and a second hand valve 45 which are connected to the bottom of the heat exchanger 22. The liquid level meter 23 is electrically connected with the electromagnetic valve IV 39 and the pneumatic pump II 40 through a control system. The first pneumatic pump 18 and the second pneumatic pump 40 are connected to a pneumatic triplet 48 via a fifth solenoid valve 46 and a sixth solenoid valve 47, respectively.
The working process is as follows:
firstly, the refrigeration system starts to refrigerate, the second compressor 28 starts, the refrigerant flows out from the heat exchanger 22, is separated by the gas-liquid separator 27, then the liquid refrigerant is remained in the gas-liquid separator 27, the gaseous refrigerant enters the second compressor 28, then passes through the second oil separator 29 to remove the oil content therein, and the second compressor 28 can be supplemented with oil through the oil pipeline at the bottom. Then enters a condenser 30 and a filter 31, and returns to the heat exchanger 22 through a second wet-degree mirror 32 and an expansion valve 33. The thermometer 35 monitors the temperature of the heat exchanger 22, and when the monitored refrigeration temperature is acceptable, the hand valve is opened to start recovery of the refrigerant.
At this time, the inlet pressure control device 9 monitors the pressure of the air conditioning unit, and when the set pressure value is reached, the total solenoid valve 11 is opened, and if the set pressure value is not reached, the total solenoid valve 11 is automatically closed, and at this time, even if the start button is manually pressed, the system does not operate. After the total electromagnetic valve 11 is opened, the electromagnetic valve 15 is also opened, high-pressure refrigerant automatically enters the heat exchanger 22 through the pipeline II 3, after a set time, the electromagnetic valve II 15 is closed, at the moment, when the pressure of the pressure control device I12 is higher than a set value, the electromagnetic valve III 17 and the electromagnetic valve V46 are opened, the pneumatic pump I18 works, when the pressure of the pressure control device I12 is lower than the set value, the electromagnetic valve III 17 and the electromagnetic valve V46 are closed, the pneumatic pump I18 stops working, the electromagnetic valve I13 is opened, the compressor I14 works, the refrigerant enters the heat exchanger 22 through the pipeline I2, and when the pressure of the inlet pressure control device 9 is lower than the set shutdown pressure, the electromagnetic valve I13 is closed, and the compressor I14 stops working.
In the process, the liquid level meter 23 continuously monitors the liquid level in the heat exchanger 22, when the liquid level reaches a set value, the solenoid valve IV 39, the solenoid valve VI 47 and the hand valve II 45 are opened, the pneumatic pump II 40 works, and liquefied refrigerant in the heat exchanger 22 is discharged; when the liquid level is lower than a certain value, the solenoid valve six 47 and the hand valve two 45 are closed, and the pneumatic pump two 40 stops working.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (7)
1. The low-temperature auxiliary refrigerant recovery system is characterized by comprising a refrigerant pumping device, a refrigerant liquefying device and a refrigerant collecting device, wherein the refrigerant pumping device is connected with an air conditioning refrigerating unit, the refrigerant pumping device comprises an inlet main pipeline connected with the air conditioning refrigerating unit, a pipeline I, a pipeline II and a pipeline III which are arranged in parallel, and a pipeline IV connected with the refrigerant liquefying device, a hand valve I, a drying filter, an oil separator I, an inlet pressure control device and a main electromagnetic valve electrically connected with the inlet pressure control device are arranged on the inlet main pipeline, a pressure control device I, an electromagnetic valve I and a compressor I are arranged on the pipeline I, an electromagnetic valve II and a one-way valve I are arranged on the pipeline II, an electromagnetic valve III and a pneumatic pump I are arranged on the pipeline III, and the pressure control device I is electrically connected with the electromagnetic valve I, the compressor I, the electromagnetic valve II and the electromagnetic valve III through a control system; the refrigerant liquefying device comprises a heat exchanger and a refrigerating system connected with the heat exchanger, and a liquid level meter extending into the heat exchanger is arranged at the top of the heat exchanger; the refrigerant collecting device comprises a fourth electromagnetic valve and a second pneumatic pump which are connected to the bottom of the heat exchanger, and the liquid level meter is electrically connected with the fourth electromagnetic valve and the second pneumatic pump through a control system;
the refrigerating system comprises a gas-liquid separator, a second compressor, a second oil separator, a condenser, a filter and an expansion valve which are connected with the heat exchanger, wherein the bottom of the second oil separator is connected with the second compressor through an oil pipeline;
the refrigerant collecting device further comprises a first dry-wet degree sight glass, a second one-way valve, a second high-pressure control device, a second high-pressure meter and a second hand valve which are connected with the second pneumatic pump.
2. The system of claim 1, wherein the bulb of the expansion valve is attached to an outlet line of the refrigeration system that is connected to the heat exchanger.
3. The system of claim 1, wherein a low pressure gauge and a high pressure gauge are respectively disposed on the front and rear sides of the second compressor, and two ends of the second compressor are connected in parallel with a second pressure control device.
4. A cryogenic auxiliary refrigerant recovery system according to claim 1, wherein a second humidity mirror is provided between the filter and the expansion valve.
5. The cryogenic auxiliary refrigerant recovery system of claim 1, wherein the first pneumatic pump and the second pneumatic pump are connected to the pneumatic triplet via a fifth solenoid valve and a sixth solenoid valve, respectively.
6. The cryogenic auxiliary refrigerant recovery system of claim 1, wherein a bottom of the oil separator is connected to an oil drain line, and wherein a dry-wet sight glass three and an oil drain valve are provided on the oil drain line.
7. The cryogenic auxiliary refrigerant recovery system of claim 1, wherein a safety valve, a third high pressure gauge and a manual pressure relief valve are provided on top of the heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810103120.2A CN108168166B (en) | 2018-02-01 | 2018-02-01 | Low-temperature auxiliary refrigerant recovery system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810103120.2A CN108168166B (en) | 2018-02-01 | 2018-02-01 | Low-temperature auxiliary refrigerant recovery system |
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| Publication Number | Publication Date |
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| CN108168166A CN108168166A (en) | 2018-06-15 |
| CN108168166B true CN108168166B (en) | 2023-11-24 |
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| CN201810103120.2A Active CN108168166B (en) | 2018-02-01 | 2018-02-01 | Low-temperature auxiliary refrigerant recovery system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108592468A (en) * | 2018-05-02 | 2018-09-28 | 顾晓航 | A kind of low temperature auxiliary recycling unit |
| CN110542252A (en) * | 2019-09-27 | 2019-12-06 | 铜川安泰再生资源回收利用有限公司 | Self-induction automobile refrigerant extraction device and control method |
| CN111141541B (en) * | 2020-01-20 | 2021-09-24 | 上海交通大学 | Movable oil-containing refrigerant testing device and method |
| CN114183951B (en) * | 2021-12-16 | 2022-12-09 | 珠海格力电器股份有限公司 | Refrigerant purification recovery device and refrigerant purification system |
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| KR101785415B1 (en) * | 2016-07-29 | 2017-10-13 | (주)쿨뱅크 | Refrigerant Recovery Method using A Refrigerant Recovery Filling Apparatuse |
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| CN208108570U (en) * | 2018-02-01 | 2018-11-16 | 青岛绿环工业设备有限公司 | A kind of low temperature auxiliary refrigerant recovery system |
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2018
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| EP0397760A1 (en) * | 1988-01-28 | 1990-11-22 | Olsson Clas Ove | Method and Apparatus for Recovery of Refrigerant. |
| JPH08178477A (en) * | 1994-12-22 | 1996-07-12 | Hitachi Ltd | Refrigerant recoverying device |
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| CN108168166A (en) | 2018-06-15 |
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