CN115200251B - Fluorine pump pressure refrigeration system and control method thereof - Google Patents
Fluorine pump pressure refrigeration system and control method thereof Download PDFInfo
- Publication number
- CN115200251B CN115200251B CN202210830976.6A CN202210830976A CN115200251B CN 115200251 B CN115200251 B CN 115200251B CN 202210830976 A CN202210830976 A CN 202210830976A CN 115200251 B CN115200251 B CN 115200251B
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- fluorine pump
- pipe
- oil
- regenerator
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- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 title claims abstract description 123
- 229910052731 fluorine Inorganic materials 0.000 title claims abstract description 123
- 239000011737 fluorine Substances 0.000 title claims abstract description 123
- 238000005057 refrigeration Methods 0.000 title claims abstract description 60
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000003921 oil Substances 0.000 claims abstract description 130
- 239000007788 liquid Substances 0.000 claims abstract description 108
- 239000003507 refrigerant Substances 0.000 claims abstract description 63
- 238000010438 heat treatment Methods 0.000 claims abstract description 60
- 239000010687 lubricating oil Substances 0.000 claims abstract description 53
- 239000000203 mixture Substances 0.000 claims abstract description 51
- 230000000694 effects Effects 0.000 claims abstract description 15
- 230000001105 regulatory effect Effects 0.000 claims description 40
- 230000001276 controlling effect Effects 0.000 claims description 30
- 230000006835 compression Effects 0.000 claims description 29
- 238000007906 compression Methods 0.000 claims description 29
- 239000012530 fluid Substances 0.000 claims description 26
- 239000007921 spray Substances 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 9
- 238000004378 air conditioning Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 claims 4
- 238000002309 gasification Methods 0.000 claims 2
- 230000007547 defect Effects 0.000 abstract description 4
- 238000004891 communication Methods 0.000 description 7
- 238000000926 separation method Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 239000011552 falling film Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000001802 infusion Methods 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000012545 processing Methods 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
- F25B23/00—Machines, plants or systems, with a single mode of operation not covered by groups F25B1/00 - F25B21/00, e.g. using selective radiation effect
-
- 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
- F25B31/00—Compressor arrangements
- F25B31/002—Lubrication
- F25B31/004—Lubrication oil recirculating 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
- F25B41/24—Arrangement of shut-off valves for disconnecting a part of the refrigerant cycle, e.g. an outdoor part
-
- 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
- F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
-
- 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
-
- 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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/16—Lubrication
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Power Engineering (AREA)
- Jet Pumps And Other Pumps (AREA)
- Compressor (AREA)
Abstract
The invention provides a fluorine pump pressure refrigeration system and a control method thereof, wherein the fluorine pump pressure refrigeration system comprises: the compressor, the condenser, the throttle valve, the liquid storage container, the fluorine pump and the evaporator are connected to form an air conditioner circulation loop; the fluorine pump is communicated with the regenerator, the fluorine pump can convey the oil liquid mixture in the liquid storage container to the regenerator, the regenerator can generate heating effect on the oil liquid mixture so as to gasify the refrigerant in the oil liquid mixture and convey the gasified refrigerant to the air suction port of the compressor, lubricating oil in the oil liquid mixture can be stored at the bottom of the regenerator, the regenerator is communicated with the oil conveying component, and the lubricating oil in the regenerator can be conveyed to the air suction port of the compressor through the oil conveying component. The defect that lubricating oil is difficult to recover in a liquid supply refrigeration mode of a fluorine pump of a low-pressure liquid storage container in the prior art can be overcome.
Description
Technical Field
The invention relates to the technical field of refrigeration, in particular to a fluorine pump pressure refrigeration system and a control method thereof.
Background
With the rapid development of the communication industry, the use of high-power density communication equipment such as blade servers, rack servers and the like with small volumes and strong processing capacity makes the heating value of a single cabinet of a data center larger and larger, and the heating value of some cabinets reaches or even exceeds 20 kW.
The air conditioner between the columns is generally provided with a compressor and an evaporator, is matched with the outdoor unit in a one-to-one correspondence manner, can also adopt a liquid storage container liquid pump driving mode, adopts a unified refrigerant low-pressure liquid barrel, and supplies liquid to the indoor unit of the air conditioner between the columns by an independent fluorine pump, so that a plurality of air conditioners between the columns can share one large-sized outdoor unit.
From the energy saving perspective, the outdoor natural cold source in transitional seasons and cold winter is adopted to cool the data center, so that the running cost of the air conditioning equipment can be greatly reduced, and a fluorine pump air conditioner is commonly adopted. In winter or transitional seasons, outdoor cold air is very suitable to be used as a natural cold source, a fluorine pump mode is started at the moment, the operation of the compressor is stopped, the heat pipe is driven by the fluorine pump to realize the refrigerating operation of the heat pipe, and the heat pipe transfers the cold of the outdoor natural cold source (cold air) in winter or transitional seasons into a indoor data center for cooling, so that the operation cost of equipment is greatly reduced.
Split type air conditioning units typically employ mechanically driven split heat pipes, such as fluorine pump driven heat pipes using liquid or air pumps. When the heat pipe and the heat pump share the system, a mode of parallel connection of a throttling element and a solenoid valve is generally adopted. Closing the electromagnetic valve when the heat pump operates, and reducing the pressure of the refrigerant through the throttling element; when the heat pipe runs, the electromagnetic valve is opened, and the refrigerant mainly passes through the electromagnetic valve with low resistance, so that most of gravity or the lift of the fluorine pump is avoided due to the large resistance of the throttling element.
The low-pressure liquid storage container has the phenomena of gas-liquid separation and low-temperature oil delamination, lubricating oil (refrigerating oil of a compressor) is difficult to return to the compressor, oil shortage is likely to occur in the starting stage of the compressor, and the compressor is damaged in severe cases. Typical cases are common in fluorine pump liquid supply refrigeration systems for refrigerators.
Disclosure of Invention
Therefore, the invention provides a fluorine pump pressure refrigeration system and a control method thereof, which can overcome the defect that lubricating oil is difficult to recover in a low-pressure liquid storage container fluorine pump liquid supply refrigeration mode in the prior art.
In order to solve the above problems, the present invention provides a fluorine pump pressure refrigeration system comprising: the air conditioner comprises a compressor, a condenser, a throttle valve, a liquid storage container, a fluorine pump and an evaporator, wherein the compressor, the condenser, the throttle valve, the liquid storage container, the fluorine pump and the evaporator are connected to form an air conditioner circulation loop;
the fluorine pump is communicated with the heat regenerator, the fluorine pump can convey the oil liquid mixture in the liquid storage container to the heat regenerator, the heat regenerator can generate heating effect on the oil liquid mixture so as to gasify the refrigerant in the oil liquid mixture and convey the gasified refrigerant to the air suction port of the compressor, lubricating oil in the oil liquid mixture can be stored at the bottom of the heat regenerator, the heat regenerator is communicated with the oil conveying assembly, and the lubricating oil in the heat regenerator can be conveyed to the air suction port of the compressor through the oil conveying assembly.
In some embodiments, the air conditioner further comprises a first one-way valve and an oil separator, wherein an outlet of the first one-way valve and an air outlet of the compressor are both communicated to the oil separator, an inlet of the first one-way valve, the evaporator and the heat regenerator are both communicated with an air suction port of the compressor, one end of the oil separator is communicated with the compressor, the other end of the oil separator is communicated with the condenser, an air outlet is formed in the liquid storage container, the air outlet is communicated with the air suction port of the compressor through a second one-way valve, and a liquid suction port is further formed in the liquid storage container and is communicated with the fluorine pump.
In some embodiments, the oil delivery assembly comprises an oil outlet pipe, one end of the oil outlet pipe is communicated with the heat regenerator, the other end of the oil outlet pipe is communicated with an electromagnetic valve through a third one-way valve, the electromagnetic valve is communicated with the air suction port of the compressor, the inlet of the electromagnetic valve is also communicated with the oil separator, and lubricating oil stored in the heat regenerator and lubricating oil separated by the oil separator are conveyed into the compressor through the electromagnetic valve.
In some embodiments, the oil separator is in communication with the inlet of the solenoid valve via a capillary tube that is capable of depressurizing the lubricating oil exiting the oil separator for delivery to the compressor via the solenoid valve.
In some embodiments, the inlet of the solenoid valve is in communication with an injector, the injector comprising a first inlet in communication with the oil separator, a second inlet in communication with the outlet of the third one-way valve, and a discharge port in communication with the inlet of the solenoid valve.
In some embodiments, a spray pipe and a heating pipe are arranged in the heat regenerator, the spray pipe is communicated with the fluorine pump through a liquid return pipe, the fluorine pump conveys the oil mixture into the spray pipe through the liquid return pipe, so that the spray pipe sprays the oil mixture on the heating pipe, the heating pipe can generate a heating effect on the oil mixture so as to gasify a refrigerant in the oil mixture, and lubricating oil in the oil mixture can be stored at the bottom of the heat regenerator.
In some embodiments, the liquid return pipe is provided with a regulating valve, and the regulating valve can regulate the flow rate of the liquid mixture in the liquid return pipe according to the degree of superheat of the air suction port of the compressor.
In some embodiments, when the real-time superheat degree of the air suction port of the compressor is lower than a second preset superheat degree and is greater than or equal to zero, the regulating valve increases the opening degree, when the real-time superheat degree of the air suction port of the compressor is greater than the second preset superheat degree and is smaller than a first preset superheat degree, the regulating valve decreases the opening degree, and when the real-time superheat degree of the air suction port of the compressor is greater than the first preset superheat degree, the regulating valve is closed, wherein the second preset superheat degree and the first preset superheat degree are both constants, and the second preset superheat degree is smaller than the first preset superheat degree.
In some embodiments, an air outlet pipe is arranged on the heat regenerator, one end of the air outlet pipe is communicated with the heat regenerator, the other end of the air outlet pipe is communicated with the air suction port of the compressor, a fourth one-way valve is arranged on the air outlet pipe, the fourth one-way valve only allows fluid to flow from the heat regenerator to the air suction port of the compressor, and the gasified refrigerant of the heat regenerator can be conveyed into the compressor through the air outlet pipe.
In some embodiments, one end of the heating pipe is connected with an inlet pipe, the other end of the heating pipe is connected with an outlet pipe, the inlet pipe can input the refrigerant compressed by the compressor into the heating pipe so as to raise the temperature of the heating pipe, and the outlet pipe can convey the refrigerant in the heating pipe to the air conditioning circulation loop.
In some embodiments, the outlet pipe is communicated with the throttle valve, the inlet pipe is communicated with the condenser, the inlet pipe can input the refrigerant discharged by the condenser into the heating pipe so as to raise the temperature of the heating pipe, and the outlet pipe can convey the refrigerant in the heating pipe to the liquid storage container through the throttle valve.
In some embodiments, the outlet pipe is connected to the condenser, the inlet pipe is connected to the exhaust port of the compressor, the inlet pipe can input the refrigerant discharged from the compressor into the heating pipe so as to raise the temperature of the heating pipe, and the outlet pipe can convey the refrigerant in the heating pipe to the condenser.
The invention also provides a control method of the fluorine pump cooling system, which comprises the following steps,
the fluorine pump pressure refrigeration system comprises a compression refrigeration mode and a fluorine pump heat pipe mode; when solenoid valves and regulating valves are included;
judging, namely judging the current mode of the fluorine pump compression refrigeration system;
and when the fluorine pump pressure cooling system is in a fluorine pump heat pipe mode, controlling to close the regulating valve, and controlling to open or close the electromagnetic valve according to the continuous running time of the fluorine pump heat pipe mode.
In some embodiments, when the fluorine pump pressure refrigeration system is in a compression refrigeration mode;
a detection step of detecting real-time superheat DeltaT of an air suction port of the compressor;
judging, namely judging the relation between DeltaT and a first preset superheat DeltaT 1, wherein: the first preset superheat degree delta T1 is a constant;
and a control step, when DeltaT < DeltaT1, controlling the regulating valve to be opened, introducing the oil liquid mixture into the heat regenerator, and when DeltaT is not less than DeltaT 1, controlling the regulating valve to be closed, and stopping introducing the oil liquid mixture into the heat regenerator.
In some embodiments, when 0.ltoreq.DeltaT < DeltaT2, controlling to increase the opening degree of the regulating valve; when DeltaT 2 is less than or equal to DeltaT < DeltaT1, controlling to reduce the opening of the regulating valve; wherein DeltaT 2 is a second preset superheat degree, and DeltaT 2 < DeltaT1.
In some embodiments, the solenoid valve is controlled to be opened or closed according to the time of continuous operation of the fluorine pump heat pipe mode, specifically:
a detection step of detecting the time t of the continuous operation of the fluorine pump heat pipe mode,
judging, namely judging the relation between the t and the first preset time t 1;
and controlling to open the electromagnetic valve when t is more than or equal to t1 so as to enable lubricating oil in the oil separator to be at least partially conveyed into the compressor, closing the electromagnetic valve after the electromagnetic valve is continuously opened for t2 time, and resetting and counting the time t running zero of the fluorine pump heat pipe mode continuously running.
According to the fluorine pump compression refrigeration system and the control method thereof, the low-pressure oil-liquid mixture provides driving force through the fluorine pump, so that the low-pressure oil-liquid mixture in the liquid storage container enters the heat regenerator, the oil-liquid mixture is heated in the heat regenerator, the refrigerant is gasified and returned to the compressor, fluctuation of the temperature of the low-temperature refrigerant in the liquid storage container is prevented, lubricating oil is conveyed to the compressor through the oil conveying component, the effect of oil-liquid separation is achieved, and the defect that the lubricating oil is difficult to recycle in a liquid supply refrigeration mode of the fluorine pump of the low-pressure liquid storage container in the prior art can be overcome.
Drawings
FIG. 1 is a schematic diagram of a fluorine pump pressure refrigeration system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a fluorine pump pressure refrigeration system according to a second embodiment of the present invention;
FIG. 3 is a schematic diagram of a third embodiment of a fluorine pump pressure refrigeration system of the present invention;
fig. 4 is a schematic structural diagram of a fluorine pump pressure refrigeration system according to a fourth embodiment of the present invention.
The reference numerals are expressed as:
1. a compressor; 2. a first one-way valve; 3. an oil separator; 4. a condenser; 5. a fourth one-way valve; 6. an air outlet pipe; 7. a shower pipe; 8. heating pipes; 9. a regenerator; 10. an external fan; 11. feeding a pipe; 12. a pipe outlet; 13. an oil outlet pipe; 14. a third one-way valve; 15. an ejector; 16. a capillary tube; 17. an electromagnetic valve; 18. a liquid return pipe; 19. a second one-way valve; 20. a liquid storage container; 21. an air outlet; 22. a liquid suction port; 23. a fluorine pump; 24. a regulating valve; 25. an evaporator; 26. an inner fan; 27. a throttle valve.
Detailed Description
Referring to fig. 1 to 4, there is provided a fluorine pump pressure refrigeration system according to an embodiment of the present invention, including: the compressor 1, the condenser 4, the throttle valve 27, the liquid storage container 20, the fluorine pump 23 and the evaporator 25 are connected to form an air conditioning circulation loop; the fluorine pump 23 is communicated with the heat regenerator 9, the fluorine pump 23 can convey the oil liquid mixture in the liquid storage container 20 into the heat regenerator 9, the heat regenerator 9 can generate heating effect on the oil liquid mixture so as to gasify the refrigerant in the oil liquid mixture and convey the gasified refrigerant to the air suction port of the compressor 1, lubricating oil in the oil liquid mixture can be stored at the bottom of the heat regenerator 9, the heat regenerator 9 is communicated with an oil conveying component, and the lubricating oil in the heat regenerator 9 can be conveyed to the air suction port of the compressor 1 through the oil conveying component. In this technical scheme, fluid mixture includes: lubricating oils and liquid refrigerants; the condenser 4 is adapted with the outer fan 10, the evaporator is adapted with the inner fan 26, the low pressure oil liquid mixture provides driving force through the fluorine pump 23, so that the low pressure oil liquid mixture in the liquid storage container 20 (fluorine barrel) enters the regenerator, the oil liquid mixture is heated in the regenerator 9, the refrigerant is gasified back into the compressor 1, fluctuation of the temperature of the low temperature refrigerant in the liquid storage container is prevented, lubricating oil is conveyed into the compressor 1 through the oil conveying component, the effect of oil-liquid separation is achieved, and the defect that the lubricating oil is difficult to recover in a low pressure liquid storage container fluorine pump liquid supply refrigeration mode in the prior art can be overcome.
In a specific embodiment, the fluorine pump pressure refrigeration system further comprises a first one-way valve 2 and an oil separator 3, wherein an outlet of the first one-way valve 2 and an exhaust port of the compressor 1 are both communicated with the oil separator 3, an inlet of the first one-way valve 2, the evaporator 25 and the regenerator 9 are both communicated with an air suction port of the compressor 1, one end of the oil separator 3 is communicated with the compressor 1, the other end of the oil separator is communicated with the condenser 4, an air outlet 21 is arranged on the liquid storage container 20, the air outlet 21 is communicated with the air suction port of the compressor 1 through a second one-way valve 19, a liquid suction port 22 is further arranged on the liquid storage container 20, and the liquid suction port 22 is communicated with the fluorine pump 23. The first check valve 2 only allows fluid to flow from the air suction port of the compressor 1 to the air discharge port of the compressor 1, the air in the liquid storage container 20 only flows from the liquid storage container 20 to the compressor 1 through the second check valve 19, the fluorine pump 23 can suck out liquid fluid from the liquid storage container 20 and convey the liquid fluid to the heat regenerator 9 and/or the evaporator 25, and the low-pressure liquid storage container 20 and the fluorine pump 23 serve as a common connection point and a conversion point of the multi-mode refrigerating system, so that the sharing and control of system parts are simplified, and the low-pressure oil driven by the fluorine pump 23 is separated by the heat regenerator 9. Specifically, a spray pipe 7 and a heating pipe 8 are arranged in the heat regenerator 9, the spray pipe 7 is communicated with the fluorine pump 23 through a liquid return pipe 18, the fluorine pump 23 conveys the oil mixture into the spray pipe 7 through the liquid return pipe 18, so that the spray pipe 7 sprays the oil mixture on the heating pipe 8, the heating pipe 8 can generate a heating effect on the oil mixture so as to gasify a refrigerant in the oil mixture, and lubricating oil in the oil mixture can be stored at the bottom of the heat regenerator 9. According to the technical scheme, the oil mixture can be uniformly sprayed on the heating pipe 8 through the spraying pipe 7, the heating effect of the heating pipe 8 is utilized to gasify the refrigerant in the oil mixture, and lubricating oil in the oil mixture can be stored at the bottom of the heat regenerator 9, so that oil separation is completed. The falling film type heat exchange efficiency is higher by spraying on the outer surface of the heating pipe 8; the oil waiting for oil return of the lubricating oil separated at low pressure can be performed according to the oil return strategy of the compressor, otherwise, the oil level in the oil sump of the compressor may be too high. The first check valve 2 is directed from the suction port of the compressor 1 to the discharge port of the compressor 1. The fluorine pump liquid supply refrigerating system and the fluorine pump heat pipe refrigerating system which are integrated with the low-pressure liquid storage container are used for realizing the sharing and control simplification of system parts and separating low-pressure oil driven by the fluorine pump by using a heat regenerator.
In a specific embodiment, the return pipe 18 is provided with a regulating valve 24, and the regulating valve 24 can regulate the flow rate of the oil-liquid mixture in the return pipe 18 according to the degree of superheat of the suction port of the compressor 1. Specifically, when the real-time superheat degree of the air suction port of the compressor 1 is lower than a second preset superheat degree and is greater than or equal to zero, the opening degree of the regulating valve 24 is increased, when the real-time superheat degree of the air suction port of the compressor 1 is greater than the second preset superheat degree and is smaller than a first preset superheat degree, the opening degree of the regulating valve 24 is reduced, and when the real-time superheat degree of the air suction port of the compressor 1 is greater than the first preset superheat degree, the regulating valve 24 is closed, wherein the second preset superheat degree and the first preset superheat degree are both constants, and the second preset superheat degree is smaller than the first preset superheat degree. In this technical scheme, the regulating valve 24 can control the size of heat back, prevents that the refrigerant liquid that the fluorine pump 23 carried to the evaporimeter 25 from reducing too much, and the circulation capacity size of regulating valve 24 and the height of the induction port superheat degree of compressor 1 become negative correlation characteristic and adjust, and the induction port superheat degree is low then the governing valve opens the large-traffic, and the induction port superheat degree is high then the governing valve opens the small-traffic. The amount of the return fluid entering the regenerator 9 is controlled from the regulating valve 24, the amount of the return fluid of the regenerator 9 can be controlled, and the size of the separated return fluid can be controlled, so that the opening period of the electromagnetic valve for return fluid can be judged. The oil is more separated when the liquid return amount is large, and the opening period of the electromagnetic valve 17 is correspondingly reduced, so that the oil can return to the compressor 1 as soon as possible.
In a specific embodiment, an air outlet pipe 6 is disposed on the heat regenerator 9, one end of the air outlet pipe 6 is connected to the heat regenerator 9, the other end is connected to the air suction port of the compressor 1, a fourth one-way valve 5 is disposed on the air outlet pipe 6, the fourth one-way valve 5 only allows fluid to flow from the heat regenerator 9 to the air suction port of the compressor 1, and the refrigerant gasified by the heat regenerator 9 can be conveyed into the compressor 1 through the air outlet pipe 6. Specifically, one end of the heating pipe 8 is connected with an inlet pipe 11, the other end of the heating pipe is connected with an outlet pipe 12, the inlet pipe 11 can input the refrigerant compressed by the compressor 1 into the heating pipe 8 so as to raise the temperature of the heating pipe 8, and the outlet pipe 12 can convey the refrigerant in the heating pipe 8 to the air conditioning circulation loop. In this technical scheme, the gasified refrigerant is sent to the compressor 1 through the air outlet pipe 6, thereby realizing the recycling of the refrigerant, and the refrigerant can be prevented from flowing back through the fourth check valve 5. The refrigerant in the air conditioner circulation loop is recycled through the inlet pipe 11 and the outlet pipe 12, and the high-temperature refrigerant in the air conditioner circulation loop can be cooled.
In a specific embodiment, the outlet pipe 12 is connected to the throttle valve 27, the inlet pipe 11 is connected to the condenser 4, the inlet pipe 11 can input the refrigerant discharged from the condenser 4 into the heating pipe 8 so as to raise the temperature of the heating pipe 8, and the outlet pipe 12 can convey the refrigerant in the heating pipe 8 to the liquid storage container 20 through the throttle valve 27. In the technical scheme, high-temperature refrigerant discharged from the condenser 4 is conveyed into the heating pipe 8 through the inlet pipe 11 and the outlet pipe 12, so that the temperature of the heating pipe 8 is increased, the oil liquid mixture sprayed by the spray pipe 7 is heated and evaporated, and lubricating oil and the refrigerant are separated.
In a specific embodiment, the outlet pipe 12 is connected to the condenser 4, the inlet pipe 11 is connected to the exhaust port of the compressor 1, the inlet pipe 11 can input the refrigerant discharged from the compressor 1 into the heating pipe 8 so as to raise the temperature of the heating pipe 8, and the outlet pipe 12 can convey the refrigerant in the heating pipe 8 to the condenser 4. In this technical scheme, preferably, advance pipe 11 intercommunication oil separator 3's export, the refrigerant temperature is higher before condenser 4 import, can heat the evaporation to the fluid in the regenerator 9 better, and the separation effect is better. The outlet of the fluorine pump 23 controls the oil return quantity and the heat return quantity of the heat regenerator 9 through the regulating valve 24, so that the fluorine pump 23 provides power for the separation of oil liquid, and simultaneously supercools the refrigerant before throttling or pre-cools the high-temperature exhaust gas; the regulating valve is controlled by the height of the air suction temperature; a spray pipe is arranged in the heat regenerator 9, so that the heat exchange efficiency is improved; the low-pressure gas heated in the heat regenerator 9 directly returns to the air suction port of the compressor 1 to prevent the fluctuation of the temperature of the low-temperature refrigerant in the liquid storage container 20; the gas-liquid mixture at the outlet of the evaporator 25 is directly returned to the suction port of the compressor 1, which is beneficial to carrying lubricating oil back to the compressor.
In a specific embodiment, the oil delivery assembly includes an oil outlet pipe 13, one end of the oil outlet pipe 13 is communicated with the regenerator 9, the other end of the oil outlet pipe 13 is communicated with an electromagnetic valve 17 through a third one-way valve 14, the electromagnetic valve 17 is communicated with an air suction port of the compressor 1, an inlet of the electromagnetic valve 17 is also communicated with the oil separator 3, and lubricating oil stored in the regenerator 9 and lubricating oil separated by the oil separator 3 are both conveyed into the compressor 1 through the electromagnetic valve 17. In the technical scheme, lubricating oil separated by the heat regenerator 9 and lubricating oil separated by the oil separator 3 are conveyed to the compressor 1 through the electromagnetic valve 17, so that the recycling of the lubricating oil is realized. The outlet of the throttle valve 27 is connected with the liquid inlet of the low-pressure liquid storage container 20, and the inlet of the fluorine pump 23 is connected with the liquid suction port 22 of the low-pressure liquid storage container 20; the other pipeline is led out from the outlet of the fluorine pump 23 and is connected to the liquid return pipe 18 of the heat regenerator 9 through the regulating valve 24, the liquid return pipe 18 is connected with the spray pipe 7 horizontally arranged in the heat regenerator 9 near the top, low-pressure lubricating oil-containing liquid refrigerant is sprayed downwards to the outer surface of the heating pipe 8 in the heat regenerator 9 to be heated, the refrigerant liquid is gasified, thus realizing oil separation, and lubricating oil is deposited at the bottom of the heat regenerator 9 to be stored and wait for oil return; the refrigerant gas flows out from the gas outlet pipe 6 at the top of the heat regenerator 9 and returns to the air suction port of the compressor through the fourth one-way valve 5. The oil outlet pipe of the heat regenerator 9 is connected to the injection port of the ejector 15 through a third one-way valve 14, and flows from the oil outlet pipe 13 to the ejector 15; the outlet of the ejector 15 is connected to the suction port of the compressor 1 through a solenoid valve 17.
In a specific embodiment, the oil separator 3 is communicated with the inlet of the electromagnetic valve 17 through a capillary tube 16, and the capillary tube 16 can depressurize the lubricating oil discharged from the oil separator 3 so as to be delivered into the compressor 1 through the electromagnetic valve 17. In the technical scheme, the pressure of the lubricating oil discharged by the oil separator 3 is reduced through the capillary tube 16, so that the lubricating oil is prevented from generating liquid impact on the compressor 1, and the normal operation of the system is ensured.
In a specific embodiment, the inlet of the solenoid valve 17 is connected to an injector 15, and the injector 15 includes a first inlet, a second inlet and a discharge, wherein the first inlet is connected to the oil separator 3, the second inlet is connected to the outlet of the third check valve 14, and the discharge is connected to the inlet of the solenoid valve 17. In the technical scheme, the ejector 15 can recover the expansion work of the oil returned by the oil separator 3 so as to ensure that the lubricating oil separated by the heat regenerator 9 and the lubricating oil separated by the oil separator 3 can return to the compressor 1, thereby realizing the recycling of the lubricating oil. When the electromagnetic valve is closed, the third one-way valve 14 can prevent the high-temperature and high-pressure refrigerant in the oil separator from flowing back from the regenerator to the air suction port of the compressor through the fourth one-way valve 5.
The invention also provides a control method of the fluorine pump pressure refrigeration system, which comprises the following steps:
the fluorine pump pressure refrigeration system comprises a compression refrigeration mode and a fluorine pump heat pipe mode; when the solenoid valve 17 and the regulator valve 24 are included;
judging, namely judging the current mode of the fluorine pump compression refrigeration system;
and a control step of controlling to open the electromagnetic valve 17 and the regulating valve 24 when the fluorine pump pressure refrigeration system is in a compression refrigeration mode, so that the lubricating oil in the heat regenerator 9 and the lubricating oil in the oil separator 3 are at least partially conveyed into the compressor 1, and controlling to close the regulating valve 24 when the fluorine pump pressure refrigeration system is in a fluorine pump heat pipe mode, and controlling to open or close the electromagnetic valve 17 according to the continuous operation time of the fluorine pump heat pipe mode.
In this technical scheme, when in the compression refrigeration mode, regenerator 9 and oil separator 3 function simultaneously, guarantee the oil mass of compressor 1 and the oily effect in the system, when in the fluorine pump heat pipe mode, in order to avoid reducing the infusion ability of fluorine pump, close governing valve 24, regenerator 9 is the transport effect in the system this moment, specifically carries the refrigerant through heating pipe 8.
The refrigerant flow direction in the compression refrigeration mode includes, compressor 1→oil separator 3→condenser 4→regenerator 9→throttle valve 27→reservoir 20→second check valve 19→compressor 1→oil separator 3→condenser 4→regenerator 9→throttle valve 27→reservoir 20→fluorine pump 23→evaporator 25→compressor 1, compressor 1→oil separator 3→condenser 4→regenerator 9→throttle valve 27→reservoir 20→fluorine pump 23→regulating valve 24→regenerator 9→fourth check valve 5→compressor 1;
the flow direction of the oil return pipeline is as follows: referring to fig. 1 and 3, [ (regenerator 9 outlet line 13→third check valve 14→injector 15 port) + (oil separator 3 oil return port→injector 15 inlet) ] →injector 15 outlet→solenoid valve 17→compressor 1 suction port;
see fig. 2 and 4, [ (regenerator 9 outlet line 13→third check valve 14) + (oil separator 3 return port→capillary tube 16) ] →solenoid valve 17→compressor 1 suction port.
The refrigerant flow direction when in the heat pipe mode of the fluorine pump includes the fluorine pump 23→the evaporator 25→the first check valve 2→the oil separator 3→the condenser 4→the regenerator 9→the throttle valve 27→the liquid storage container 20→the fluorine pump 23.
In a specific embodiment, the solenoid valve 17 is controlled to be closed or opened according to the duration of the operation of the heat pipe mode of the fluorine pump, specifically:
a detection step of detecting the time t of the continuous operation of the fluorine pump heat pipe mode,
judging, namely judging the relation between the t and the first preset time t 1;
and controlling to open the electromagnetic valve 17 when t is more than or equal to t1 so as to enable lubricating oil in the oil separator 3 to be at least partially conveyed into the compressor 1, and resetting the zero clearing of the time t for continuous operation of the fluorine pump heat pipe mode after the electromagnetic valve 17 is continuously opened for t 2.
In the technical scheme, in order to reduce the influence of lubricating oil on the refrigerating effect of the heat pipe of the fluorine pump, after the continuous operation time of the heat pipe mode of the fluorine pump exceeds a preset time, the lubricating oil in the oil separator 3 is conveyed into the compressor 1 so as to reduce the lubricating oil in an oil pipeline. Because the flow and the lift of the fluorine pump are smaller than those of the compressor, the opening of the throttle valve is required to be kept to be the maximum, and the consumption of too much fluorine pump lift at the throttle valve is avoided; the regulating valve is normally in a closed state in the heat pipe mode of the fluorine pump, so that the transfusion capability of the fluorine pump is prevented from being reduced.
In a specific embodiment, the detecting step, when the fluorine pump pressure refrigeration system is in a compression refrigeration mode;
a detection step of detecting real-time superheat DeltaT of an air suction port of the compressor 1;
judging, namely judging the relation between DeltaT and a first preset superheat DeltaT 1, wherein: the first preset superheat degree delta T1 is a constant;
and a control step of controlling the regulating valve 24 to be opened when DeltaT < DeltaT1, and controlling the regulating valve 24 to be closed when DeltaT is more than or equal to DeltaT 1, so as to stop introducing the oil mixture into the heat regenerator 9.
Specifically, when Δtj < Δt2is 0.ltoreq.Δt2, the opening degree of the regulator valve 24 is controlled to be increased; when DeltaT 2 is less than or equal to DeltaT < DeltaT1, controlling to reduce the opening of the regulating valve 24; wherein DeltaT 2 is a second preset superheat degree, and DeltaT 2 < DeltaT1.
In this embodiment, the flow capacity of the control valve 24 is generally adjusted to a negative correlation with the degree of superheat of the intake port of the compressor 1, and when the degree of superheat of the intake port is low, the control valve 24 is opened at a large flow rate, and when the degree of superheat of the intake port is high, the control valve is opened at a small flow rate. The amount of the return fluid flowing into the regenerator 9 is controlled by the regulating valve 24, the amount of the return fluid flowing into the regenerator 9 can be controlled, and the amount of the separated return fluid can be controlled, so that the opening period of the electromagnetic valve 17 for returning the return fluid can be judged. The oil is more separated when the liquid return amount is large, and the opening period of the electromagnetic valve 17 is correspondingly reduced, so that the oil can return to the compressor 1 as soon as possible. The refrigerant liquid supplied from the fluorine pump to the evaporator is prevented from being excessively reduced by controlling the adjusting valve 24 by the suction superheat of the compressor 1, thereby controlling the amount of the separated lubricating oil. The larger the superheat Δt, the more refrigerant the regenerator flows through and the less refrigerant the evaporator flows through, so it is necessary to reduce the opening of the regulator valve 24 and make the refrigerant flow more to the evaporator to ensure the cooling effect.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention. The foregoing is merely a preferred embodiment of the present invention, and it should be noted that it will be apparent to those skilled in the art that modifications and variations can be made without departing from the technical principles of the present invention, and these modifications and variations should also be regarded as the scope of the invention.
Claims (16)
1. A fluorine pump compression refrigeration system, characterized in that: comprising the following steps: the air conditioner comprises a compressor (1), a condenser (4), a throttle valve (27), a liquid storage container (20), a fluorine pump (23) and an evaporator (25), wherein the compressor (1), the condenser (4), the throttle valve (27), the liquid storage container (20), the fluorine pump (23) and the evaporator (25) are connected to form an air conditioner circulation loop;
the utility model discloses a compressor, including fluid storage container (20), regenerator (9) are connected to fluoride pump (23), fluoride pump (23) can with the fluid mixture in reservoir (20) is carried in regenerator (9), regenerator (9) can produce the heating effect to the fluid mixture to make the refrigerant gasification in the fluid mixture, and carry gasified refrigerant to the induction port of compressor (1), lubricating oil in the fluid mixture can be stored in the bottom of regenerator (9), regenerator (9) are connected with oil delivery subassembly, can with lubricating oil in regenerator (9) is carried to the induction port of compressor (1) through oil delivery subassembly.
2. The fluorine pump compression refrigeration system of claim 1, wherein: still include first check valve (2) and oil separator (3), the export of first check valve (2) with the gas vent of compressor (1) all communicates to oil separator (3), the import of first check valve (2) evaporator (25) with regenerator (9) all communicate the induction port of compressor (1), the one end intercommunication of oil separator (3) compressor (1), the other end intercommunication condenser (4), be provided with gas outlet (21) on reservoir (20), gas outlet (21) pass through second check valve (19) with the induction port intercommunication of compressor (1), still be provided with on reservoir (20) liquid suction port (22), liquid suction port (22) intercommunication fluorine pump (23).
3. The fluorine pump compression refrigeration system of claim 2, wherein: the oil delivery assembly comprises an oil outlet pipe (13), one end of the oil outlet pipe (13) is communicated with the heat regenerator (9), the other end of the oil outlet pipe (13) is communicated with an electromagnetic valve (17) through a third one-way valve (14), the electromagnetic valve (17) is communicated with an air suction port of the compressor (1), an inlet of the electromagnetic valve (17) is further communicated with the oil separator (3), and lubricating oil stored in the heat regenerator (9) and lubricating oil separated by the oil separator (3) are conveyed to the compressor (1) through the electromagnetic valve (17).
4. A fluorine pump compression refrigeration system as claimed in claim 3, wherein: the oil separator (3) is communicated with the inlet of the electromagnetic valve (17) through a capillary tube (16), and the capillary tube (16) can reduce the pressure of lubricating oil discharged by the oil separator (3) so as to be conveyed into the compressor (1) through the electromagnetic valve (17).
5. A fluorine pump compression refrigeration system as claimed in claim 3, wherein: the inlet of the electromagnetic valve (17) is communicated with an ejector (15), the ejector (15) comprises a first inlet, a second inlet and a discharge outlet, the first inlet is communicated with the oil separator (3), the second inlet is communicated with the outlet of the third one-way valve (14), and the discharge outlet is communicated with the inlet of the electromagnetic valve (17).
6. A fluorine pump compression refrigeration system as claimed in claim 3, wherein: be provided with shower (7) and heating pipe (8) in regenerator (9), shower (7) are through return liquid pipe (18) intercommunication fluoride pump (23), fluoride pump (23) are through return liquid pipe (18) are with the fluid mixture is carried in shower (7), so that shower (7) are with the fluid mixture spray on heating pipe (8), heating pipe (8) can produce the heating effect to the fluid mixture, so that the refrigerant gasification in the fluid mixture, lubricating oil in the fluid mixture can be stored in the bottom of regenerator (9).
7. The fluorine pump compression refrigeration system of claim 6, wherein: the oil liquid mixture flow rate of the liquid return pipe (18) can be adjusted by the adjusting valve (24) according to the degree of superheat of the air suction port of the compressor (1), and the adjusting valve (24) is arranged on the liquid return pipe (18).
8. The fluorine pump compression refrigeration system of claim 7, wherein: when the real-time superheat degree of the air suction port of the compressor (1) is lower than a second preset superheat degree and is larger than or equal to zero, the opening degree of the regulating valve (24) is increased, when the real-time superheat degree of the air suction port of the compressor (1) is larger than the second preset superheat degree and smaller than a first preset superheat degree, the opening degree of the regulating valve (24) is reduced, when the real-time superheat degree of the air suction port of the compressor (1) is larger than the first preset superheat degree, the regulating valve (24) is closed, wherein the second preset superheat degree and the first preset superheat degree are constants, and the second preset superheat degree is smaller than the first preset superheat degree.
9. The fluorine pump compression refrigeration system of claim 6, wherein: be provided with outlet duct (6) on regenerator (9), the one end intercommunication of outlet duct (6) regenerator (9), the other end intercommunication the induction port of compressor (1), be provided with fourth check valve (5) on outlet duct (6), fourth check valve (5) only permit fluid follow regenerator (9) flow to the induction port of compressor (1), through outlet duct (6) can with the gasified refrigerant of regenerator (9) is carried in compressor (1).
10. The fluorine pump compression refrigeration system of claim 6, wherein: one end of the heating pipe (8) is communicated with an inlet pipe (11), the other end of the heating pipe is communicated with an outlet pipe (12), the inlet pipe (11) can input the refrigerant compressed by the compressor (1) into the heating pipe (8) so as to enable the temperature of the heating pipe (8) to rise, and the outlet pipe (12) can convey the refrigerant in the heating pipe (8) to the air conditioning circulation loop.
11. The fluorine pump compression refrigeration system of claim 10, wherein: the outlet pipe (12) is communicated with the throttle valve (27), the inlet pipe (11) is communicated with the condenser (4), the inlet pipe (11) can input the refrigerant discharged by the condenser (4) into the heating pipe (8) so as to enable the temperature of the heating pipe (8) to be raised, and the outlet pipe (12) can convey the refrigerant in the heating pipe (8) into the liquid storage container (20) through the throttle valve (27).
12. The fluorine pump compression refrigeration system of claim 10, wherein: the outlet pipe (12) is communicated with the condenser (4), the inlet pipe (11) is communicated with the exhaust port of the compressor (1), the inlet pipe (11) can input the refrigerant discharged by the compressor (1) into the heating pipe (8) so as to enable the temperature of the heating pipe (8) to rise, and the outlet pipe (12) can convey the refrigerant in the heating pipe (8) into the condenser (4).
13. A method of controlling a fluorine pump pressure refrigeration system as set forth in claim 7, characterized in that:
the fluorine pump pressure refrigeration system comprises a compression refrigeration mode and a fluorine pump heat pipe mode;
judging, namely judging the current mode of the fluorine pump compression refrigeration system;
and a control step of controlling to open the electromagnetic valve (17) and controlling to open or close the regulating valve (24) when the fluorine pump pressure refrigeration system is in a compression refrigeration mode, so that lubricating oil in the heat regenerator (9) and lubricating oil in the oil separator (3) are at least partially conveyed into the compressor (1), and controlling to close the regulating valve (24) and controlling to open or close the electromagnetic valve (17) according to the continuous running time of the fluorine pump heat pipe mode when the fluorine pump pressure refrigeration system is in the fluorine pump heat pipe mode.
14. The method of controlling a fluorine pump compression refrigeration system of claim 13, wherein:
when the fluorine pump pressure refrigeration system is in a compression refrigeration mode;
a detection step of detecting a real-time superheat DeltaT of an air suction port of the compressor (1);
judging, namely judging the relation between DeltaT and a first preset superheat DeltaT 1, wherein: the first preset superheat degree delta T1 is a constant;
and a control step, when DeltaT < DeltaT1, controlling the regulating valve (24) to be opened, introducing the oil liquid mixture into the heat regenerator (9), and when DeltaT is more than or equal to DeltaT 1, controlling the regulating valve (24) to be closed, and stopping introducing the oil liquid mixture into the heat regenerator (9).
15. The method of controlling a fluorine pump compression refrigeration system of claim 14, wherein: when DeltaT < DeltaT2 is less than or equal to 0, controlling to increase the opening of the regulating valve (24); when DeltaT 2 is less than or equal to DeltaT < DeltaT1, controlling to reduce the opening of the regulating valve (24); wherein DeltaT 2 is a second preset superheat degree, and DeltaT 2 < DeltaT1.
16. The method of controlling a fluorine pump compression refrigeration system of claim 13, wherein: and controlling to close or open the electromagnetic valve (17) according to the continuous operation time of the fluorine pump heat pipe mode, specifically:
a detection step of detecting the time t of the continuous operation of the fluorine pump heat pipe mode,
judging, namely judging the relation between the t and the first preset time t 1;
and controlling to open the electromagnetic valve (17) when t is more than or equal to t1 so as to enable lubricating oil in the oil separator (3) to be at least partially conveyed into the compressor (1), closing the electromagnetic valve (17) after the electromagnetic valve (17) is continuously opened for t2 time, and resetting and reckoning the time t operation of the continuous operation of the fluorine pump heat pipe mode.
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| CN202210830976.6A CN115200251B (en) | 2022-07-15 | 2022-07-15 | Fluorine pump pressure refrigeration system and control method thereof |
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| CN202210830976.6A CN115200251B (en) | 2022-07-15 | 2022-07-15 | Fluorine pump pressure refrigeration system and control method thereof |
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