CN115200253B - Fluorine pump pressure refrigeration system and control method thereof - Google Patents

Fluorine pump pressure refrigeration system and control method thereof Download PDF

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Publication number
CN115200253B
CN115200253B CN202210832205.0A CN202210832205A CN115200253B CN 115200253 B CN115200253 B CN 115200253B CN 202210832205 A CN202210832205 A CN 202210832205A CN 115200253 B CN115200253 B CN 115200253B
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China
Prior art keywords
pipeline
communicated
fluorine pump
way valve
throttle valve
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CN202210832205.0A
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Chinese (zh)
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CN115200253A (en
Inventor
黄玉优
林海佳
赖桃辉
赵敏娜
任启峰
赵材波
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN202210832205.0A priority Critical patent/CN115200253B/en
Publication of CN115200253A publication Critical patent/CN115200253A/en
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Classifications

    • 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

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  • 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)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Compression-Type Refrigeration Machines With Reversible Cycles (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 evaporator, the fluorine pump, the heat exchanger, the throttle valve A and the throttle valve B form a main circulation system; the fluorine pump can be communicated with the evaporator; one end of the heat exchanger can be communicated with the exhaust end of the compressor, the other end of the heat exchanger can be communicated to the evaporator through the throttle valve A, meanwhile, the other end of the heat exchanger can be communicated to the condenser through the throttle valve B, the other end of the condenser can be communicated to the air suction end of the compressor, and the other end of the evaporator can also be communicated to the air suction end of the compressor. According to the invention, a set of system can be applied to various working scenes, and the problem of fusion design of a fluorine pump heat pipe refrigerating system, a heat recovery system, a double-evaporator refrigerating system and a conventional refrigerating system is solved.

Description

Fluorine pump pressure refrigeration system and control method thereof
Technical Field
The invention relates to the technical field of air conditioners, 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.
From the aspect of energy saving, 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 heat pipe system 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 heat pipe mode is started at the moment, the operation of the compressor is stopped, the heat pipe refrigeration operation is realized by using a fluorine pump to drive a refrigerant, and the heat pipe system 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 a fluorine pump, such as a liquid pump or air pump, to drive the flow of refrigerant within the heat pipes. When the heat pipe and the heat pump share the system, a mode of parallel design of a throttling element and an electromagnetic valve is generally adopted: closing the electromagnetic valve when the heat pump operates, and performing throttling and depressurization operation on 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 by the throttling element with high resistance.
The huge heat dissipation capacity released by the data center for 24 hours can be used for heating heat sources in winter, for example, heating hot water is prepared by using a heat recovery mode, and the requirement of municipal heating or heating of staff of the data center is met.
The multifunctional and multipurpose air conditioner for the data center machine room has the primary task of ensuring the constant temperature and humidity regulation and control requirement of the data center and the secondary task of realizing additional functions. How to integrate various refrigeration systems to form a multifunctional refrigeration unit and how to solve the problems of operation reliability and control, so as to realize more energy-saving and higher-efficiency operation, and the multifunctional refrigeration unit is worthy of being explored, researched and developed by designers.
Because the fluorine pump heat pipe refrigerating system, the heat recovery system, the double-evaporator refrigerating system and the conventional refrigerating system in the prior art can not realize effective fusion, the technical problems that the double-evaporator refrigerating system can not realize during heat recovery and the like can not be solved, the invention designs the fluorine pump refrigerating system and the control method thereof.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to overcome the defect that the fluorine pump heat pipe refrigerating system, the heat recovery system, the double-evaporator refrigerating system and the conventional refrigerating system in the prior art cannot realize effective fusion, so that the double-evaporator refrigerating can not be realized during heat recovery, and the fluorine pump pressure refrigerating system and the control method thereof are provided.
In order to solve the above problems, the present invention provides a fluorine pump pressure refrigeration system comprising:
the device comprises a compressor, a condenser, an evaporator, a fluorine pump, a heat exchanger, a throttle valve A and a throttle valve B, wherein the compressor, the condenser, the evaporator and the throttle valve A and/or the throttle valve B form a main circulation system; the fluorine pump can be communicated with the evaporator; one end of the heat exchanger can be communicated with the exhaust end of the compressor, the other end of the heat exchanger can be communicated to the evaporator through the throttle valve A, meanwhile, the other end of the heat exchanger can also be communicated to the condenser through the throttle valve B, the other end of the condenser can be communicated to the air suction end of the compressor, and the other end of the evaporator can also be communicated to the air suction end of the compressor.
In some embodiments, the system further comprises a four-way valve a and a gas-liquid separator, wherein the four-way valve a comprises a first end, a second end, a third end and a fourth end, the first end is communicated with the inlet end of the heat exchanger, the second end is communicated with the exhaust end of the compressor, the third end is communicated with the condenser, and the fourth end is communicated with the interior of the gas-liquid separator; the other end of the evaporator is communicated to the gas-liquid separator through a first pipeline, and the air suction end of the compressor is communicated to the inside of the gas-liquid separator through a second pipeline.
In some embodiments, the pipe section of the second pipeline extending into the gas-liquid separator is configured as a U-shaped pipe, the free end of the U-shaped pipe is located above the bent section of the U-shaped pipe, the free end of the U-shaped pipe is located above the liquid level in the gas-liquid separator, the bent section of the second pipeline is located at the bottom of the U-shaped pipe and below the liquid level, and an oil return hole is further provided in the bent section, and the oil return hole can suck oil in the gas-liquid separator into the U-shaped pipe.
In some embodiments, one end of the first pipeline extends into the gas-liquid separator and is positioned above the liquid level in the gas-liquid separator,
the first end of the four-way valve A is communicated to the inlet end of the heat exchanger through a third pipeline, the second end of the four-way valve A is communicated to the exhaust end of the compressor through a fourth pipeline, the third end of the four-way valve A is communicated to the condenser through a fifth pipeline, the fourth end of the four-way valve A is communicated to the gas-liquid separator through a sixth pipeline, and one end of the sixth pipeline stretches into the gas-liquid separator and is located above the liquid level in the gas-liquid separator.
In some embodiments, the system further comprises a liquid storage tank, a seventh pipeline, an eighth pipeline, a ninth pipeline and a tenth pipeline, wherein one end of the ninth pipeline is communicated with the condenser, the other end of the ninth pipeline is communicated with the interior of the liquid storage tank, and the throttle valve B is arranged on the ninth pipeline; one end of the eighth pipeline is communicated to the ninth pipeline, the other end of the eighth pipeline is also communicated to the inside of the liquid storage tank, one end of the seventh pipeline is communicated to the outlet end of the heat exchanger, the other end of the seventh pipeline is communicated to the eighth pipeline, and one end of the tenth pipeline is communicated with the inside of the liquid storage tank, and the other end of the tenth pipeline can be communicated to the evaporator.
In some embodiments, the refrigerant fluid at the outlet end of the heat exchanger can enter the liquid storage tank through the seventh pipeline and the eighth pipeline, the refrigerant fluid in the liquid storage tank can enter the ninth pipeline and enter the condenser after being throttled by the throttle valve B, and the refrigerant fluid in the liquid storage tank can also enter the tenth pipeline and enter the evaporator after being throttled by the throttle valve A.
In some embodiments, the position where the eighth pipeline is communicated with the ninth pipeline is located between the throttle valve B and the condenser, and a one-way valve A is further arranged on the eighth pipeline, and the one-way valve A only allows fluid to flow from the condenser to the liquid storage tank; the position where the seventh pipeline is communicated with the eighth pipeline is located between the one-way valve A and the liquid storage tank, and the seventh pipeline is also provided with a one-way valve B which only allows fluid to flow from the heat exchanger to the liquid storage tank.
In some embodiments, one end of the eighth conduit extends into the liquid storage tank below the liquid level in the liquid storage tank, and one end of the ninth conduit extends into the liquid storage tank below the liquid level in the liquid storage tank.
In some embodiments, the system further comprises a four-way valve B, an eleventh pipeline, a twelfth pipeline and a thirteenth pipeline, wherein the four-way valve B comprises a fifth end, a sixth end, a seventh end and an eighth end, the fifth end is communicated with the tenth pipeline, the sixth end is communicated with one end of the eleventh pipeline, the seventh end is communicated with one end of the twelfth pipeline, the eighth end is communicated with one end of the thirteenth pipeline, the other end of the eleventh pipeline, the other end of the twelfth pipeline and the other end of the thirteenth pipeline are communicated with one end of the evaporator after being combined, the throttle valve a is arranged on the eleventh pipeline, and the fluorine pump is arranged on the twelfth pipeline;
when the fifth end of the four-way valve B is communicated with the sixth end, the seventh end is communicated with the eighth end; alternatively, when the fifth end of the four-way valve B communicates with the seventh end, the sixth end communicates with the eighth end.
In some embodiments, the four-way valve B comprises a valve housing, a valve core, a fourteenth pipeline and a fifteenth pipeline, wherein the valve core can move in a cavity of the valve housing, a first cavity is formed between the valve core and one side wall of the valve housing, a second cavity is formed between the valve core and the other side wall of the valve housing, one end of the fourteenth pipeline is communicated with the fifth end of the four-way valve B, the other end of the fourteenth pipeline is communicated with the first cavity, one end of the fifteenth pipeline is communicated with the eighth end of the four-way valve B, and the other end of the fifteenth pipeline is communicated with the second cavity; when the pressure of the first cavity is greater than the pressure of the second cavity, the valve element is pushed so that the fifth end is communicated with the sixth end, and the seventh end is communicated with the eighth end; when the pressure of the first cavity is less than the pressure of the second cavity, the valve element is pushed so that the fifth end communicates with the seventh end, and the sixth end communicates with the eighth end.
In some embodiments, when the compressor is on and the fluorine pump is off, the pressure at the fifth end is greater than the pressure at the eighth end, such that the pressure in the first cavity is greater than the pressure in the second cavity; when the compressor is turned off and the fluorine pump is turned on, the pressure at the fifth end is less than the pressure at the eighth end, such that the pressure in the first cavity is less than the pressure in the second cavity.
The invention also provides a control method of the fluorine pump pressure refrigeration system, wherein:
when the fluorine pump compression refrigeration system further comprises a four-way valve A, and the four-way valve A comprises a first end, a second end, a third end and a fourth end:
the control method comprises the following steps:
judging, namely judging whether the operation mode of the fluorine pump pressure refrigeration system is a conventional compression refrigeration mode, a heating water mode, a heat recovery single-evaporator refrigeration mode, a heat recovery double-evaporator refrigeration mode or a fluorine pump heat pipe refrigeration mode;
a control step of controlling the compressor to be opened, controlling the fluorine pump to be closed and controlling the first end and the fourth end of the four-way valve A to be communicated when the operation mode is a normal compression refrigeration mode, and controlling the second end and the third end to be communicated; and the throttle valve A is controlled to be opened, and the throttle valve B is controlled to be opened to the maximum opening;
When the operation mode is in a water heating mode, the compressor is controlled to be opened, the fluorine pump is controlled to be closed, the first end of the four-way valve A is controlled to be communicated with the second end, and the third end of the four-way valve A is controlled to be communicated with the fourth end; and the throttle valve A is controlled to be closed, and the throttle valve B is controlled to be opened;
when the operation mode is in a heat recovery single-evaporator refrigeration mode, controlling the compressor to be opened, controlling the fluorine pump to be closed, and controlling the first end and the second end of the four-way valve A to be communicated, and the third end and the fourth end to be communicated; and the throttle valve A is controlled to be opened, and the throttle valve B is controlled to be closed;
when the operation mode is a heat recovery double-evaporator refrigeration mode, the compressor is controlled to be opened, the fluorine pump is controlled to be closed, the first end of the four-way valve A is controlled to be communicated with the second end, and the third end of the four-way valve A is controlled to be communicated with the fourth end; and controlling the throttle valve A and the throttle valve B to be opened;
when the operation mode is a fluorine pump heat pipe refrigeration mode, controlling the fluorine pump to be opened, controlling the compressor to be closed, and controlling the first end and the second end of the four-way valve A to be communicated, and the third end and the fourth end to be communicated; and controls both the throttle valve a and the throttle valve B to be opened to the maximum opening degree.
The fluorine pump pressure refrigeration system and the control method thereof provided by the invention have the following beneficial effects:
1. according to the invention, through the structural arrangement of the compressor, the condenser, the evaporator, the fluorine pump, the heat exchanger, the throttle valve A and the throttle valve B, one end of the heat exchanger can be communicated to the exhaust end of the compressor, the other end of the heat exchanger can be communicated to the evaporator through the throttle valve A, and the other end of the heat exchanger can be communicated to the condenser through the throttle valve B, so that the heat exchanger can be used as a heat recoverer to prepare hot water and the like, the other end of the heat exchanger can be throttled by the throttle valve A to enter the evaporator for evaporation, and the other end of the heat exchanger can be throttled by the throttle valve B to enter the condenser for evaporation, so that a double-evaporator heat recovery double-evaporator refrigerating system is formed, and therefore, the heat recovery double-evaporator refrigerating system can be effectively realized through the components and the connection relation, the heat recovery double-evaporator (single evaporation temperature) refrigerating mode and the natural cold source fluorine pump refrigerating mode can be applied to various working scenes, and the fusion design problem of the fluorine pump heat pipe refrigerating system, the heat recovery system, the double evaporation temperature refrigerating system and the conventional system can be solved;
2. The invention establishes a set of multi-mode refrigerating system through matching 2 one-way valves with 2 expansion throttle valves by key parts such as an electromagnetic four-way valve, a liquid storage tank, a self-operated differential pressure four-way valve, a fluorine pump and the like; the throttle valve A is completely closed, and the throttle valve B is automatically adjusted to realize a water heating mode, so that the refrigerating capacity of the evaporator and the heating capacity of the water heater are preferably met to the greatest extent, and the refrigerating requirement of the data center and the external heating requirement are simultaneously ensured; the multifunctional unit can adapt to various running environments;
3. the invention has very few valve elements for controlling the mode switching, only needs to control 1 electromagnetic four-way valve and adjust 2 throttle valves, and has simple and reliable mode switching, and can solve the mode switching and control problems of a multifunctional refrigerating system; the invention also has low pipeline circulation resistance of the heat pipe system under the heat pipe mode of the fluorine pump, thereby being beneficial to reducing the power consumption of the fluorine pump; the three-pipe gas-liquid separator can separate and store lubricating oil, so that the heat exchange efficiency of the heat pipe is improved.
Drawings
FIG. 1 is a system diagram of a multi-functional heat recovery fluorine pump air conditioner of the present invention in a heat recovery dual evaporator cooling mode;
FIG. 2 is a system diagram of the air conditioner of the multi-functional heat recovery fluorine pump pumping machine room of the invention when the heat of the fluorine pump is controlled;
FIG. 3 is a schematic diagram of a four-way valve B (self-actuated differential pressure four-way valve) according to the present invention when the pressure at the fifth end dd is greater than the pressure at the eighth end ss;
fig. 4 is a structural diagram of the four-way valve B (self-operated differential pressure four-way valve) of the present invention when the pressure at the fifth end dd is smaller than the pressure at the eighth end ss.
The reference numerals are expressed as:
1. a compressor; 2. a condenser; 3. an evaporator; 4. a throttle valve A; 5. a throttle valve B; 6. a heat exchanger; 7. a four-way valve B; dd. A fifth end; cc. A sixth end; ee. A seventh end; ss, eighth end; 71. a valve housing; 72. a valve core; 73. a first cavity; 74. a second cavity; 8. a four-way valve A; C. a first end; D. a second end; E. a third end; s, a fourth end; 9. a gas-liquid separator; 11. a liquid storage tank; 12. a one-way valve A; 13. a one-way valve B; 15. a fluorine pump; 101. a first pipeline; 102. a second pipeline; 103. a third pipeline; 104. a fourth pipeline; 105. a fifth pipeline; 106. a sixth pipeline; 107. a seventh pipeline; 108. an eighth pipeline; 109. a ninth pipeline; 110. a tenth pipeline; 111. an eleventh pipeline; 112. a twelfth line; 113. a thirteenth line; 114. a fourteenth pipeline; 115. a fifteenth pipeline.
Detailed Description
As shown in fig. 1 to 4, the present invention provides a fluorine pump compression refrigeration system comprising:
a compressor 1, a condenser 2 (the condenser of the present invention is just a name of a heat exchange member which can not only make refrigerant condense therein to release heat but also make refrigerant evaporate therein to absorb heat), an evaporator 3, a fluorine pump 15, a heat exchanger 6 (preferably a water heater capable of producing hot water), a throttle valve A4 and a throttle valve B5, said compressor 1, said condenser 2 and said evaporator 3 and said throttle valve A4 and/or said throttle valve B5 constituting a main circulation system; the fluorine pump can be communicated with the evaporator 3; one end of the heat exchanger 6 can be communicated with the exhaust end of the compressor 1, the other end of the heat exchanger 6 can be communicated to the evaporator 3 through the throttle valve A4, meanwhile, the other end of the heat exchanger 6 can also be communicated to the condenser 2 through the throttle valve B5, the other end of the condenser 2 can be communicated to the air suction end of the compressor 1, and the other end of the evaporator 3 can also be communicated to the air suction end of the compressor 1.
According to the invention, through the structural arrangement of the compressor, the condenser, the evaporator, the fluorine pump, the heat exchanger, the throttle valve A and the throttle valve B, one end of the heat exchanger can be communicated to the exhaust end of the compressor, the other end of the heat exchanger can be communicated to the evaporator through the throttle valve A, and the other end of the heat exchanger can be communicated to the condenser through the throttle valve B, so that the heat exchanger can be used as a heat recoverer to prepare hot water and the like, the other end of the heat exchanger can be throttled by the throttle valve A to enter the evaporator for evaporation, and the other end of the heat exchanger can be throttled by the throttle valve B to enter the condenser for evaporation, so that a double-evaporator heat recovery double-evaporator refrigerating system is formed.
The invention has the following points:
1. the invention realizes the switching of the condensing heat exchanger of the high-pressure high-temperature refrigerant through key parts such as the electromagnetic four-way valve, the liquid storage tank, the self-operated differential pressure four-way valve, the fluorine pump and the like, and the self-operated differential pressure four-way valve realizes the switching of the heat pipe mode of the fluorine pump; 2 check valves are matched with 2 expansion throttle valves, a set of multi-mode refrigerating system is built, a conventional refrigerating mode, a water heating mode, a heat recovery refrigerating mode and a natural cold source fluorine pump heat pipe refrigerating mode can be realized, and the set of system can be applied to various working scenes;
2. the valve for controlling the mode switching is very few, and only 1 electromagnetic four-way valve and 2 throttle valves, a compressor and a fluorine pump are required to be regulated and controlled, so that the mode switching is simple and reliable;
3. in the heat pipe mode of the fluorine pump, the parallel throttle valve B can reduce the pipeline circulation resistance, and the pipeline circulation resistance of the heat pipe system is low, so that the power consumption of the fluorine pump is reduced; the three-pipe gas-liquid separator is equivalent to an oil separator in the mode, and can separate and store lubricating oil, so that the heat exchange efficiency of the heat pipe is improved.
Effectively solves the following technical problems:
1. the problem of fusion design of a fluorine pump heat pipe refrigerating system, a heat recovery system, a double-evaporator refrigerating system and a conventional refrigerating system is solved;
2. Mode switching and control problems for multi-function refrigeration systems.
As shown in fig. 1 to 2, the exhaust port of the compressor of the present invention is connected to the second end D of the four-way valve a, the first end C of which is sequentially connected to the water heater (heat exchanger 6, the same applies hereinafter) and the check valve B, and the outlet of the check valve B is connected to the inlet one of the liquid storage tank.
The third end E of the four-way valve A is connected to the inlet of the condenser, the outlet of the condenser is respectively connected with the inlet of the one-way valve A and the throttle valve B, the outlet of the one-way valve A is connected to the inlet I of the liquid storage tank, and the other end of the throttle valve B is connected to the inlet II of the liquid storage tank; preferably, the first inlet and the second inlet of the liquid storage tank are designed to be the same, and extend into the bottom of the liquid storage tank; the outlet of the liquid storage tank takes liquid at the bottom of the liquid storage tank.
As shown in fig. 1 to 2, the outlet of the liquid storage tank is connected to the inlet of the throttle valve a through the fifth end dd connected to the four-way valve B7, the sixth end cc of the four-way valve B is connected to the inlet of the fluorine pump, the seventh end ee of the four-way valve B is connected to the inlet of the fluorine pump, and the eighth end ss of the four-way valve B, the outlet of the throttle valve a and the outlet of the fluorine pump are simultaneously connected to the inlet of the evaporator; the outlet of the evaporator is connected to the first inlet of the three-pipe gas-liquid separator, the outlet of the gas-liquid separator is connected to the air suction port of the compressor, and the second inlet of the gas-liquid separator is connected to the fourth end S of the four-way valve A.
It should be noted that, the fans of the condenser and the evaporator are only convenient for understanding and are not used for limiting the heat exchange pattern of the condenser and the evaporator. When the water fluorine heat exchanger is adopted, a water pump is matched; obviously, the heat exchange type of the water heater is not limited, and the proper design and selection can be carried out according to actual needs.
In some embodiments, the system further comprises a four-way valve A8 and a gas-liquid separator 9, wherein the four-way valve A8 comprises a first end C, a second end D, a third end E and a fourth end S, the first end C is communicated with the inlet end of the heat exchanger 6, the second end D is communicated with the exhaust end of the compressor 1, the third end E is communicated with the condenser 2, and the fourth end S is communicated with the inside of the gas-liquid separator 9; the other end of the evaporator 3 is communicated with the gas-liquid separator 9 through a first pipeline 101, and the suction end of the compressor 1 is communicated with the inside of the gas-liquid separator 9 through a second pipeline 102. The invention can adjust the exhaust end of the compressor to be communicated with the heat exchanger through the arrangement of the four-way valve A, is applicable to a heat recovery mode at the moment, can be used for preparing hot water and the like, or can control the exhaust end of the compressor to be communicated with the condenser, is applicable to a conventional compression refrigeration mode at the moment, and the gas-liquid separator can be used for storing the refrigerant at the outlet end of the evaporator and/or the outlet end of the condenser, so that the liquid in the gas-liquid separator is stored, the gas-liquid separation is carried out, the gas is conducted to the suction end of the compressor through the second pipeline, the suction liquid carrying of the compressor is effectively avoided, and the communication of the suction end of the compressor is effectively completed.
In some embodiments, the pipe section of the second pipeline 102 extending into the gas-liquid separator 9 is configured as a U-shaped pipe, the free end of the U-shaped pipe is located above the bent section of the U-shaped pipe, and the free end of the U-shaped pipe is located above the liquid level in the gas-liquid separator 9, the bent section is located at the bottom of the U-shaped pipe and below the liquid level, and an oil return hole is further provided on the bent section, and the oil return hole can suck the oil in the gas-liquid separator 9 into the U-shaped pipe. According to the invention, the second pipeline is arranged into a U-shaped pipe structure, the free end of the U-shaped pipe is arranged above the liquid level in the gas-liquid separator, so that the sucked gas refrigerant can be ensured, and the oil return hole is arranged on the bending section at the bottom of the U-shaped pipe, so that the oil at the bottom of the gas-liquid separator can be sucked into the second pipeline through the flow of the gas refrigerant, and the oil can be sucked into the compressor from the gas-liquid separator, thereby playing a role in returning oil to the compressor.
In some embodiments, one end of the first pipe 101 extends into the gas-liquid separator 9 and is located above the liquid level in the gas-liquid separator 9,
the first end C of the four-way valve A8 is connected to the inlet end of the heat exchanger 6 through a third pipeline 103, the second end D is connected to the exhaust end of the compressor 1 through a fourth pipeline 104, the third end E is connected to the condenser 2 through a fifth pipeline 105, the fourth end S is connected to the gas-liquid separator 9 through a sixth pipeline 106, and one end of the sixth pipeline 106 extends into the gas-liquid separator 9 and is located above the liquid level in the gas-liquid separator 9.
The end part of the first pipeline extending into the gas-liquid separator is positioned above the liquid level in the gas-liquid separator, so that the condition that the liquid in the gas-liquid separator flows back into the first pipeline and enters the evaporator can be further prevented; the four-way valve A is respectively communicated with the heat exchanger, the exhaust end of the compressor, the condenser and the gas-liquid separator through the first end, the second end, the third end and the fourth end, so that the exhaust of the compressor can be effectively completed, the heat exchanger can be communicated for a heat recovery mode or the condenser can be communicated for a conventional compression refrigeration mode, the refrigerant in the gas-liquid separator can be returned to the suction end of the compressor through the second pipeline, and in the fluorine pump mode, the refrigerant in the gas-liquid separator can be communicated to the condenser through the sixth pipeline to complete the refrigerant circulation; the end part of the sixth pipeline extending into the gas-liquid separator is positioned above the liquid level in the gas-liquid separator, so that the situation that the liquid in the gas-liquid separator flows back into the sixth pipeline and enters the condenser can be prevented when the refrigerant in the condenser is led into the gas-liquid separator by the sixth pipeline, and the led-out refrigerant gas can be ensured when the refrigerant in the gas-liquid separator is led into the condenser by the sixth pipeline.
In some embodiments, the system further comprises a liquid storage tank 11, a seventh pipeline 107, an eighth pipeline 108, a ninth pipeline 109 and a tenth pipeline 110, wherein one end of the ninth pipeline 109 is communicated with the condenser 2, the other end of the ninth pipeline 109 is communicated with the interior of the liquid storage tank 11, and the throttle valve B5 is arranged on the ninth pipeline 109; one end of the eighth pipeline 108 is connected to the ninth pipeline 109, the other end of the eighth pipeline is also connected to the interior of the liquid storage tank 11, one end of the seventh pipeline 107 is connected to the outlet end of the heat exchanger 6, the other end of the seventh pipeline is connected to the eighth pipeline 108, and one end of the tenth pipeline 110 is connected to the interior of the liquid storage tank 11, and the other end of the tenth pipeline is connected to the evaporator 3. According to the invention, through the arrangement of the liquid storage tank, the refrigerant fluid at the outlet end of the heat exchanger can be stored, and can be led into the condenser for evaporation through the ninth pipeline and the throttle valve B, and meanwhile, can be led into the evaporator for evaporation through the tenth pipeline and the throttle valve A, so that the effect of heat recovery double evaporators is achieved; the water can be independently led into a condenser through a ninth pipeline and a throttle valve B to be evaporated, so that the effect of an independent water heating mode is achieved; the evaporator can be independently led into the evaporator through a tenth pipeline and a throttle valve A to evaporate, so that the effect of heat recovery single evaporator mode is achieved, and the effects of effective operation and switching among multiple modes are effectively achieved.
In some embodiments, the refrigerant fluid at the outlet end of the heat exchanger 6 can enter the liquid storage tank 11 through the seventh pipe 107 and the eighth pipe 108, the refrigerant fluid in the liquid storage tank 11 can enter the ninth pipe 109 and enter the condenser 2 after being throttled by the throttle valve B5, and the refrigerant fluid in the liquid storage tank 11 can also enter the tenth pipe 110 and enter the evaporator 3 after being throttled by the throttle valve A4. According to the invention, the refrigerant at the outlet of the heat exchanger can be effectively led into the liquid storage tank through the seventh pipeline and the eighth pipeline, the refrigerant in the liquid storage tank can be throttled by the throttle valve B and then evaporated in the condenser through the ninth pipeline, and the refrigerant in the liquid storage tank can be throttled by the throttle valve A and then evaporated in the evaporator through the tenth pipeline, so that the functions of effective operation and switching among multiple modes of the heat recovery double-evaporator, the independent heating water mode and the heat recovery single-evaporator mode are effectively completed.
In some embodiments, the position where the eighth pipe 108 communicates with the ninth pipe 109 is located between the throttle valve B5 and the condenser 2, and a check valve a12 is further disposed on the eighth pipe 108, where the check valve a12 only allows fluid to flow from the condenser 2 to the liquid storage tank 11; the position where the seventh pipeline 107 is communicated with the eighth pipeline 108 is located between the one-way valve a12 and the liquid storage tank 11, and a one-way valve B13 is further arranged on the seventh pipeline 107, and the one-way valve B13 only allows fluid to flow from the heat exchanger 6 to the liquid storage tank 11. The invention can ensure that the refrigerant can only flow from the condenser to the liquid storage tank by arranging the one-way valve A on the eighth pipeline, prevent the refrigerant in the liquid storage tank from flowing to the condenser (the condition is applicable to a heat recovery single-evaporator mode, the condenser is not operated at the moment, and the refrigerant in the liquid storage tank is prevented from flowing back to the condenser), and can ensure that the refrigerant can only flow from the heat exchanger to the liquid storage tank and prevent the refrigerant in the liquid storage tank from flowing to the heat exchanger by arranging the one-way valve B on the seventh pipeline (the condition is applicable to a conventional compression refrigeration mode, the heat exchanger is not operated at the moment, and the refrigerant in the liquid storage tank is prevented from flowing back to the heat exchanger).
In some embodiments, one end of the eighth conduit 108 extends into the liquid reservoir 11 below the liquid level in the liquid reservoir 11, and one end of the ninth conduit 109 extends into the liquid reservoir 11 below the liquid level in the liquid reservoir 11. According to the invention, the end part of the eighth pipeline extends below the liquid level in the liquid storage tank, so that the refrigerant in the gas-liquid two phases from the eighth pipeline can be ensured to be completely mixed in the refrigerant liquid in the liquid storage tank, the full mixing is carried out, the liquid storage is effectively carried out, and the fluctuation is reduced; the end part of the ninth pipeline stretches into the lower part of the liquid level in the liquid storage tank, so that the gas-liquid two-phase refrigerant from the ninth pipeline can be completely mixed in the refrigerant liquid of the liquid storage tank, the refrigerant is fully mixed, the liquid storage is effectively carried out, fluctuation is reduced, the output liquid refrigerant can be ensured when the refrigerant in the liquid storage tank flows to the condenser through the ninth pipeline, the supercooling degree is improved, and the evaporation efficiency is improved.
In some embodiments, the system further comprises a four-way valve B7, an eleventh pipe 111, a twelfth pipe 112, and a thirteenth pipe 113, wherein the four-way valve B7 comprises a fifth end dd, a sixth end cc, a seventh end ee, and an eighth end ss, wherein the fifth end dd is communicated with the tenth pipe 110, the sixth end cc is communicated with one end of the eleventh pipe 111, the seventh end ee is communicated with one end of the twelfth pipe 112, the eighth end ss is communicated with one end of the thirteenth pipe 113, and the other end of the eleventh pipe 111, the other end of the twelfth pipe 112, and the other end of the thirteenth pipe 113 are communicated with one end of the evaporator 3 after being joined, the throttle valve A4 is disposed on the eleventh pipe 111, and the fluorine pump 15 is disposed on the twelfth pipe 112;
And the fifth end dd of the four-way valve B7 communicates with the sixth end cc, the seventh end ee communicates with the eighth end ss; alternatively, when the fifth end dd of the four-way valve B7 communicates with the seventh end ee, the sixth end cc communicates with the eighth end ss.
The invention can effectively lead out the refrigerant in the liquid storage tank through the four-way valve B and the eleventh to thirteenth pipelines, or lead the refrigerant into the evaporator through the eleventh pipeline through the throttle valve A for throttling and depressurization, and the mode is suitable for the condition that the compressor is started; or the air is guided into the evaporator through a twelfth pipeline through the fluorine pump, and the mode is suitable for the condition that the fluorine pump is started; the invention can effectively complete the control through the four-way valve, so that the tenth pipeline is communicated with the eleventh pipeline when the compressor is started, the twelfth pipeline is communicated with the thirteenth pipeline to form a short circuit, and the tenth pipeline is communicated with the twelfth pipeline when the fluorine pump is started, and the eleventh pipeline is communicated with the thirteenth pipeline to form a short circuit, thereby being applicable to different mode switching of the starting of the compressor and the starting of the fluorine pump.
As shown in fig. 3-4, in some embodiments, the four-way valve B7 includes a valve housing 71, a valve core 72, a fourteenth pipe 114, and a fifteenth pipe 115, wherein the valve core 72 is movable within the cavity of the valve housing 71, and a first cavity 73 is provided between the valve core 72 and one side wall of the valve housing 71, a second cavity 74 is provided between the valve core 72 and the other side wall of the valve housing 71, one end of the fourteenth pipe 114 is communicated with the fifth end dd of the four-way valve B7, the other end is communicated with the first cavity, one end of the fifteenth pipe 115 is communicated with the eighth end ss of the four-way valve B7, and the other end is communicated with the second cavity 74; when the pressure of the first cavity 73 is greater than the pressure of the second cavity 74, the valve body 72 can be pushed so that the fifth end dd communicates with the sixth end cc, while the seventh end ee communicates with the eighth end ss; when the pressure of the first cavity 73 is smaller than the pressure of the second cavity 74, the spool 72 can be pushed so that the fifth end dd communicates with the seventh end ee while the sixth end cc communicates with the eighth end ss. The four-way valve B is in a preferable structural form, the valve core in the valve shell can move, the first cavity is communicated with the fifth end through a fourteenth pipeline, the second cavity is communicated with the eighth end through a fifteenth pipeline, the pressure at the fifth end can be conducted into the first cavity, the pressure at the eighth end can be conducted into the second cavity, and therefore the movement of the valve core is automatically controlled according to the pressure difference between the fifth end and the eighth end, the throttle valve A is connected when the pressure at the fifth end is larger than that at the eighth end, and the valve A is suitable for a mode of starting a compressor at the moment; when the pressure at the fifth end is smaller than that at the eighth end, the throttle valve A is closed and is suitable for a fluorine pump mode, so that the conduction mode of the valve end can be automatically adjusted according to the pressure, and the conduction mode of a pipeline can be adjusted.
In some embodiments, when the compressor 1 is on and the fluorine pump 15 is off, the pressure at the fifth end dd is greater than the pressure at the eighth end ss, such that the pressure of the first cavity 73 is greater than the pressure of the second cavity 74; when the compressor 1 is turned off and the fluorine pump 15 is turned on, the pressure of the fifth end dd is smaller than the pressure of the eighth end ss, so that the pressure of the first cavity 73 is smaller than the pressure of the second cavity 74.
When the compressor is started and the fluorine pump is closed, the pressure of the fifth end is higher than that of the eighth end, because the pressure of the eighth end is equal to that of the seventh end of the fluorine pump pipeline (the pressure of the eighth end is equal to that of the seventh end of the fluorine pump pipeline through the communication between the twelfth pipeline and the thirteenth branch pipeline), the throttle valve A can be automatically adjusted to be connected according to the pressure difference when the compressor is started; when the compressor is closed and the fluorine pump is started, the pressure of the eighth end is equal to the pressure of the pipeline where the fluorine pump mode is located, and the pressure of the eighth end is larger than the pressure of the fifth end, so that the valve core is controlled to move leftwards according to the pressure at the moment, the fifth end is communicated with the seventh end, and the liquid storage tank is communicated with the fluorine pump. Therefore, the automatic switching of modes can be completed by the automatic control communication mode according to the starting of the compressor or the starting of the fluorine pump through the self-operated differential pressure four-way valve (the four-way valve B), and the efficiency is high.
The invention also provides a control method of the fluorine pump pressure refrigeration system, wherein:
when the fluorine pump compression refrigeration system further comprises a four-way valve A8, and the four-way valve A8 comprises a first end C, a second end D, a third end E and a fourth end S:
the control method comprises the following steps:
judging, namely judging whether the operation mode of the fluorine pump pressure refrigeration system is a conventional compression refrigeration mode, a heating water mode, a heat recovery single-evaporator refrigeration mode, a heat recovery double-evaporator refrigeration mode or a fluorine pump heat pipe refrigeration mode;
a control step of controlling the compressor 1 to be turned on, controlling the fluorine pump 15 to be turned off, and controlling the first end C of the four-way valve A8 to be communicated with the fourth end S and the second end D to be communicated with the third end E when the operation mode is a normal compression refrigeration mode; and the throttle valve A4 is controlled to be opened, and the throttle valve B5 is controlled to be opened to the maximum opening;
when the operation mode is the water heating mode, the compressor 1 is controlled to be opened, the fluorine pump 15 is controlled to be closed, the first end C of the four-way valve A8 is controlled to be communicated with the second end D, and the third end E is controlled to be communicated with the fourth end S; and the throttle valve A4 is controlled to be closed, and the throttle valve B5 is controlled to be opened;
When the operation mode is in the heat recovery single-evaporator refrigeration mode, the compressor 1 is controlled to be turned on, the fluorine pump 15 is controlled to be turned off, the first end C of the four-way valve A8 is controlled to be communicated with the second end D, and the third end E is controlled to be communicated with the fourth end S; and the throttle valve A4 is controlled to be opened, and the throttle valve B5 is controlled to be closed;
when the operation mode is a heat recovery double-evaporator refrigeration mode, the compressor 1 is controlled to be opened, the fluorine pump 15 is controlled to be closed, the first end C of the four-way valve A8 is controlled to be communicated with the second end D, and the third end E is controlled to be communicated with the fourth end S; and controls both the throttle valve A4 and the throttle valve B5 to be opened;
when the operation mode is a heat pipe refrigeration mode of the fluorine pump, the fluorine pump 15 is controlled to be opened, the compressor 1 is controlled to be closed, the first end C of the four-way valve A8 is controlled to be communicated with the second end D, and the third end E is controlled to be communicated with the fourth end S; and controls both the throttle valve A4 and the throttle valve B5 to be opened to the maximum opening degree.
According to the invention, through the structural arrangement of the compressor, the condenser, the evaporator, the fluorine pump, the heat exchanger, the throttle valve A and the throttle valve B, one end of the heat exchanger can be communicated to the exhaust end of the compressor, the other end of the heat exchanger can be communicated to the evaporator through the throttle valve A, and the other end of the heat exchanger can be communicated to the condenser through the throttle valve B, so that the heat exchanger can be used as a heat recoverer to prepare hot water and the like, the other end of the heat exchanger can be throttled by the throttle valve A to enter the evaporator for evaporation, and the other end of the heat exchanger can be throttled by the throttle valve B to enter the condenser for evaporation, so that a double-evaporator heat recovery double-evaporator refrigerating system is formed, and therefore, the heat recovery double-evaporator refrigerating system can be effectively realized through the components and the connection relation, the heat recovery double-evaporator (single evaporation temperature) refrigerating mode and the natural cold source fluorine pump refrigerating mode can be applied to various working scenes, and the fusion design problem of the fluorine pump heat pipe refrigerating system, the heat recovery system, the double evaporation temperature refrigerating system and the conventional system can be solved;
The invention establishes a set of multi-mode refrigerating system through matching 2 one-way valves with 2 expansion throttle valves by key parts such as an electromagnetic four-way valve, a liquid storage tank, a self-operated differential pressure four-way valve, a fluorine pump and the like; the throttle valve A is completely closed, and the throttle valve B is automatically adjusted to realize a water heating mode, so that the refrigerating capacity of the evaporator and the heating capacity of the water heater are preferably met to the greatest extent, and the refrigerating requirement of the data center and the external heating requirement are simultaneously ensured; the multifunctional machine set can adapt to various running environments.
1) Refrigerant flow direction in conventional compression refrigeration mode
The compressor works, and the fluorine pump stops; the left end high pressure and the right end low pressure of the self-operated differential pressure four-way valve (four-way valve B) are conducted by dd-cc and the ee-ss; the electromagnetic four-way valve (four-way valve A) is electrified and operated in a reversing way, and DE is conducted and CS is conducted; the maximum opening of the throttle valve B is beneficial to reducing the flow resistance of the refrigerant passing through the one-way valve A, and the throttle valve A is automatically adjusted. The refrigerant flow direction of the system is as follows:
Compressor- & gtDE of four-way valve A- & gtcondenser- & gtone-way valve A (and/or throttle valve B- & gtliquid storage tank- & gtdd-cc of four-way valve B- & gtthrottle valve A- & gtevaporator- & gtgas-liquid separator- & gtcompressor
2) Refrigerant flow direction in heating water mode
The compressor works, and the fluorine pump stops; the left end high pressure and the right end low pressure of the self-operated differential pressure four-way valve (four-way valve B) are conducted by dd-cc and the ee-ss; the electromagnetic four-way valve (four-way valve A) is powered off and not commutated, and DC is conducted and ES is conducted; the throttle valve A is closed, and the throttle valve B is automatically adjusted. The refrigerant flow direction of the system is as follows:
compressor, DC of four-way valve A, water heater, one-way valve B, liquid storage tank, throttle valve B, condenser, ES of four-way valve A, gas-liquid separator and compressor
3) Refrigerant flow direction in heat recovery single evaporator refrigeration mode
The compressor works, and the fluorine pump stops; the left end high pressure and the right end low pressure of the self-operated differential pressure four-way valve (four-way valve B) are conducted by dd-cc and the ee-ss; the electromagnetic four-way valve (four-way valve A) is powered off and not commutated, and DC is conducted and ES is conducted; the throttle valve A is automatically adjusted, and the throttle valve B is closed. The refrigerant flow direction of the system is as follows:
compressor, DC of four-way valve A, water heater, one-way valve B, liquid storage tank, dd-cc of four-way valve B, throttle valve A, evaporator, gas-liquid separator and compressor
4) Refrigerant flow in heat recovery dual evaporator refrigeration mode (fig. 1)
The compressor works, and the fluorine pump stops; the left end high pressure and the right end low pressure of the self-operated differential pressure four-way valve (four-way valve B) are conducted by dd-cc and the ee-ss; the electromagnetic four-way valve (four-way valve A) is powered off and not commutated, and DC is conducted and ES is conducted; the throttle valve A and the throttle valve B are automatically adjusted. The refrigerant flow direction of the system is as follows:
5) Refrigerant flow direction in the heat pipe cooling mode of the fluorine pump (fig. 2)
Stopping the compressor and operating the fluorine pump; the left end low pressure and the right end high pressure of the self-operated differential pressure four-way valve (four-way valve B) are conducted, and dd-ee is conducted and cc-ss is conducted; the electromagnetic four-way valve (four-way valve A) is powered off, does not commutate, and is conducted by DC and ES.
In the mode, in order to reduce the flow resistance of the fluorine pump heat pipe system, the opening of the throttle valve B is adjusted to be the maximum, so that the excessive flow resistance at the check valve A is avoided; the three-pipe gas-liquid separator is equivalent to an oil separator, so that the refrigerant circulating in the system is beneficial to bringing lubricating oil back into the gas-liquid separator for separation and storage, the lubricating oil content in the fluorine pump heat pipe system is reduced, and the heat pipe system is beneficial to improving the heat exchange efficiency.
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 (11)

1. A fluorine pump compression refrigeration system, characterized in that: comprising the following steps:
the air conditioner comprises a compressor (1), a condenser (2), an evaporator (3), a fluorine pump (15), a heat exchanger (6), a throttle valve A (4) and a throttle valve B (5), wherein the compressor (1), the condenser (2), the evaporator (3) and the throttle valve A (4) and/or the throttle valve B (5) form a main circulation system; -said fluorine pump (15) being communicable with said evaporator (3); one end of the heat exchanger (6) can be communicated with the exhaust end of the compressor (1), the other end of the heat exchanger (6) can be communicated with the evaporator (3) through the throttle valve A (4), meanwhile, the other end of the heat exchanger (6) can also be communicated with the condenser (2) through the throttle valve B (5), the other end of the condenser (2) can be communicated with the air suction end of the compressor (1), and the other end of the evaporator (3) can also be communicated with the air suction end of the compressor (1);
the air-liquid separator also comprises a four-way valve A (8) and an air-liquid separator (9), wherein the four-way valve A (8) comprises a first end (C), a second end (D), a third end (E) and a fourth end (S), the first end (C) is communicated with the inlet end of the heat exchanger (6), the second end (D) is communicated with the exhaust end of the compressor (1), the third end (E) is communicated with the condenser (2), and the fourth end (S) is communicated with the inside of the air-liquid separator (9); the other end of the evaporator (3) is communicated with the gas-liquid separator (9) through a first pipeline (101), and the air suction end of the compressor (1) is communicated with the inside of the gas-liquid separator (9) through a second pipeline (102).
2. The fluorine pump compression refrigeration system of claim 1, wherein:
the pipe section of second pipeline (102) stretching into in vapour and liquid separator (9) is set up to the structure of U-shaped pipe, the free end of U-shaped pipe is located the top of the section of buckling of U-shaped pipe, just the free end is located the top of the liquid level in vapour and liquid separator (9), the section of buckling is located the bottom of U-shaped pipe and be located the below of liquid level, just still be provided with the oil return hole on the section of buckling, the oil return hole can with oil in vapour and liquid separator (9) is inhaled in the U-shaped pipe.
3. The fluorine pump compression refrigeration system of claim 1, wherein:
one end of the first pipeline (101) extends into the gas-liquid separator (9) and is positioned above the liquid level in the gas-liquid separator (9),
the four-way valve A (8) is characterized in that the first end (C) is communicated to the inlet end of the heat exchanger (6) through a third pipeline (103), the second end (D) is communicated to the exhaust end of the compressor (1) through a fourth pipeline (104), the third end (E) is communicated to the condenser (2) through a fifth pipeline (105), the fourth end (S) is communicated to the gas-liquid separator (9) through a sixth pipeline (106), and one end of the sixth pipeline (106) extends into the gas-liquid separator (9) and is located above the liquid level in the gas-liquid separator (9).
4. A fluorine pump compression refrigeration system as claimed in any one of claims 1 to 3 wherein:
the device further comprises a liquid storage tank (11), a seventh pipeline (107), an eighth pipeline (108), a ninth pipeline (109) and a tenth pipeline (110), wherein one end of the ninth pipeline (109) is communicated with the condenser (2), the other end of the ninth pipeline is communicated with the inside of the liquid storage tank (11), and the throttle valve B (5) is arranged on the ninth pipeline (109); one end of the eighth pipeline (108) is communicated to the ninth pipeline (109), the other end of the eighth pipeline is also communicated to the inside of the liquid storage tank (11), one end of the seventh pipeline (107) is communicated to the outlet end of the heat exchanger (6), the other end of the seventh pipeline is communicated to the eighth pipeline (108), one end of the tenth pipeline (110) is communicated with the inside of the liquid storage tank (11), and the other end of the tenth pipeline is communicated to the evaporator (3).
5. The fluorine pump compression refrigeration system of claim 4, wherein:
refrigerant fluid at the outlet end of the heat exchanger (6) can enter the liquid storage tank (11) through the seventh pipeline (107) and the eighth pipeline (108), the refrigerant fluid in the liquid storage tank (11) can enter the ninth pipeline (109) and enter the condenser (2) after being throttled by the throttle valve B (5), and the refrigerant fluid in the liquid storage tank (11) can also enter the tenth pipeline (110) and enter the evaporator (3) after being throttled by the throttle valve A (4).
6. The fluorine pump compression refrigeration system of claim 4, wherein:
the position where the eighth pipeline (108) is communicated with the ninth pipeline (109) is located between the throttle valve B (5) and the condenser (2), a one-way valve A (12) is further arranged on the eighth pipeline (108), and the one-way valve A (12) only allows fluid to flow from the condenser (2) to the liquid storage tank (11); the position where the seventh pipeline (107) is communicated with the eighth pipeline (108) is located between the one-way valve A (12) and the liquid storage tank (11), the seventh pipeline (107) is further provided with a one-way valve B (13), and the one-way valve B (13) only allows fluid to flow from the heat exchanger (6) to the liquid storage tank (11).
7. The fluorine pump compression refrigeration system of claim 4, wherein:
one end of the eighth pipeline (108) extends into the liquid storage tank (11) and is located below the liquid level in the liquid storage tank (11), and one end of the ninth pipeline (109) extends into the liquid storage tank (11) and is located below the liquid level in the liquid storage tank (11).
8. The fluorine pump compression refrigeration system of claim 4, wherein:
the air conditioner further comprises a four-way valve B (7), an eleventh pipeline (111), a twelfth pipeline (112) and a thirteenth pipeline (113), wherein the four-way valve B (7) comprises a fifth end (dd), a sixth end (cc), a seventh end (ee) and an eighth end (ss), the fifth end (dd) is communicated with the tenth pipeline (110), the sixth end (cc) is communicated with one end of the eleventh pipeline (111), the seventh end (ee) is communicated with one end of the twelfth pipeline (112), the eighth end (ss) is communicated with one end of the thirteenth pipeline (113), the other end of the eleventh pipeline (111), the other end of the twelfth pipeline (112) and the other end of the thirteenth pipeline (113) are communicated with one end of the evaporator (3) after being converged, the throttle valve A (4) is arranged on the eleventh pipeline (111), and the fluorine pump (15) is arranged on the twelfth pipeline (112);
And the seventh end (ee) communicates with the eighth end (ss) when the fifth end (dd) and the sixth end (cc) of the four-way valve B (7) communicate; alternatively, when the fifth end (dd) and the seventh end (ee) of the four-way valve B (7) communicate, the sixth end (cc) and the eighth end (ss) communicate.
9. The fluorine pump compression refrigeration system of claim 8, wherein:
the four-way valve B (7) comprises a valve shell (71), a valve core (72), a fourteenth pipeline (114) and a fifteenth pipeline (115), wherein the valve core (72) can move in a cavity of the valve shell (71), a first cavity (73) is formed between the valve core (72) and one side wall of the valve shell (71), a second cavity (74) is formed between the valve core (72) and the other side wall of the valve shell (71), one end of the fourteenth pipeline (114) is communicated with the fifth end (dd) of the four-way valve B (7), the other end of the fourteenth pipeline is communicated with the first cavity (73), one end of the fifteenth pipeline (115) is communicated with the eighth end (ss) of the four-way valve B (7), and the other end of the fifteenth pipeline is communicated with the second cavity (74); when the pressure of the first cavity (73) is greater than the pressure of the second cavity (74), the valve element (72) can be pushed so that the fifth end (dd) communicates with the sixth end (cc), while the seventh end (ee) communicates with the eighth end (ss); when the pressure of the first cavity (73) is smaller than the pressure of the second cavity (74), the valve core (72) can be pushed so that the fifth end (dd) communicates with the seventh end (ee), and the sixth end (cc) communicates with the eighth end (ss).
10. The fluorine pump compression refrigeration system of claim 9, wherein:
-when the compressor (1) is on, the fluorine pump (15) is off, the pressure at the fifth end (dd) is greater than the pressure at the eighth end (ss), so that the pressure of the first cavity (73) is greater than the pressure of the second cavity (74); when the compressor (1) is off and the fluorine pump (15) is on, the pressure at the fifth end (dd) is less than the pressure at the eighth end (ss) such that the pressure in the first cavity (73) is less than the pressure in the second cavity (74).
11. A control method of a fluorine pump pressure refrigeration system as set forth in any one of claims 1 to 10, characterized in that:
when the fluorine pump compression refrigeration system further comprises a four-way valve A (8), and the four-way valve A (8) comprises a first end (C), a second end (D), a third end (E) and a fourth end (S):
the control method comprises the following steps:
judging, namely judging whether the operation mode of the fluorine pump pressure refrigeration system is a conventional compression refrigeration mode, a heating water mode, a heat recovery single-evaporator refrigeration mode, a heat recovery double-evaporator refrigeration mode or a fluorine pump heat pipe refrigeration mode;
a control step of controlling the compressor (1) to be turned on, controlling the fluorine pump (15) to be turned off, and controlling the first end (C) of the four-way valve a (8) to be communicated with the fourth end (S) and the second end (D) to be communicated with the third end (E) when the operation mode is a normal compression refrigeration mode; and controlling the throttle valve A (4) to be opened and controlling the throttle valve B (5) to be opened to the maximum opening;
When the operation mode is a water heating mode, the compressor (1) is controlled to be opened, the fluorine pump (15) is controlled to be closed, the first end (C) of the four-way valve A (8) is controlled to be communicated with the second end (D), and the third end (E) is controlled to be communicated with the fourth end (S); and controlling the throttle valve A (4) to be closed and the throttle valve B (5) to be opened;
when the operation mode is in a heat recovery single-evaporator refrigeration mode, controlling the compressor (1) to be opened, controlling the fluorine pump (15) to be closed, and controlling the first end (C) of the four-way valve A (8) to be communicated with the second end (D), and controlling the third end (E) to be communicated with the fourth end (S); and controlling the throttle valve A (4) to be opened and the throttle valve B (5) to be closed;
when the operation mode is a heat recovery double-evaporator refrigeration mode, the compressor (1) is controlled to be opened, the fluorine pump (15) is controlled to be closed, the first end (C) of the four-way valve A (8) is controlled to be communicated with the second end (D), and the third end (E) is controlled to be communicated with the fourth end (S); and controlling the throttle valve A (4) and the throttle valve B (5) to be opened;
when the operation mode is a fluorine pump heat pipe refrigeration mode, the fluorine pump (15) is controlled to be opened, the compressor (1) is controlled to be closed, the first end (C) of the four-way valve A (8) is controlled to be communicated with the second end (D), and the third end (E) is controlled to be communicated with the fourth end (S); and controls both the throttle valve A (4) and the throttle valve B (5) to be opened to a maximum opening degree.
CN202210832205.0A 2022-07-15 2022-07-15 Fluorine pump pressure refrigeration system and control method thereof Active CN115200253B (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5207072A (en) * 1990-03-08 1993-05-04 Rayco Enterprises, Inc. Unloading structure for compressor of refrigeration system
CN209910083U (en) * 2019-03-01 2020-01-07 北京丰联奥睿科技有限公司 Power heat pipe multi-connected air conditioner all-in-one machine
CN112268376A (en) * 2020-09-15 2021-01-26 珠海格力电器股份有限公司 Fluorine pump type heat pipe and jet refrigeration cycle composite system and control method thereof
CN114353362A (en) * 2022-01-14 2022-04-15 江苏华强新能源科技有限公司 Direct evaporation type energy storage battery heat management unit and control method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5207072A (en) * 1990-03-08 1993-05-04 Rayco Enterprises, Inc. Unloading structure for compressor of refrigeration system
CN209910083U (en) * 2019-03-01 2020-01-07 北京丰联奥睿科技有限公司 Power heat pipe multi-connected air conditioner all-in-one machine
CN112268376A (en) * 2020-09-15 2021-01-26 珠海格力电器股份有限公司 Fluorine pump type heat pipe and jet refrigeration cycle composite system and control method thereof
CN114353362A (en) * 2022-01-14 2022-04-15 江苏华强新能源科技有限公司 Direct evaporation type energy storage battery heat management unit and control method thereof

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