CN112082286A - Heat pipe and refrigeration cycle composite system, refrigeration equipment and control method - Google Patents
Heat pipe and refrigeration cycle composite system, refrigeration equipment and control method Download PDFInfo
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- CN112082286A CN112082286A CN202011026431.7A CN202011026431A CN112082286A CN 112082286 A CN112082286 A CN 112082286A CN 202011026431 A CN202011026431 A CN 202011026431A CN 112082286 A CN112082286 A CN 112082286A
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 88
- 239000002131 composite material Substances 0.000 title claims abstract description 15
- 238000000034 method Methods 0.000 title claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 145
- 230000006835 compression Effects 0.000 claims abstract description 35
- 238000007906 compression Methods 0.000 claims abstract description 35
- 238000002347 injection Methods 0.000 claims abstract description 14
- 239000007924 injection Substances 0.000 claims abstract description 14
- 150000001875 compounds Chemical class 0.000 claims abstract description 9
- 239000003507 refrigerant Substances 0.000 claims description 41
- 238000005485 electric heating Methods 0.000 claims description 9
- 238000009491 slugging Methods 0.000 claims 1
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 7
- 229910052731 fluorine Inorganic materials 0.000 description 7
- 239000011737 fluorine Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 239000010687 lubricating oil Substances 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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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
- F25B25/00—Machines, plants or systems, using a combination of modes of operation covered by two or more of the groups F25B1/00 - F25B23/00
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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
- F25B43/00—Arrangements for separating or purifying gases or liquids; Arrangements for vaporising the residuum of liquid refrigerant, e.g. by heat
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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
- 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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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20709—Modifications to facilitate cooling, ventilating, or heating for server racks or cabinets; for data centers, e.g. 19-inch computer racks
- H05K7/208—Liquid cooling with phase change
- H05K7/20827—Liquid cooling with phase change within rooms for removing heat from cabinets, e.g. air conditioning devices
Abstract
The invention provides a heat pipe and refrigeration cycle composite system, refrigeration equipment and a control method, relates to the technical field of air conditioners, and provides a novel heat pipe and heat pump sharing system. The combined system comprises a compressor, a liquid pump, a condenser and an evaporator, wherein the compressor is connected with the condenser and the evaporator to form an injection type compression refrigeration cycle system, the liquid pump is connected with the condenser and the evaporator to form a hot pipe system, and the on-off of a valve in the combined system is adjusted to switch between the compression refrigeration cycle system and the hot pipe system. The compound system provided by the invention is simple to transform and convenient to operate and control.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a heat pipe and refrigeration cycle composite system, refrigeration equipment and a control method.
Background
With the great application of 4G and the gradual popularization of 5G, the heat productivity of various data processing devices is increasing, and the requirements of data centers on the cooling capacity and the energy conservation of air conditioning equipment are also increasing.
The data center is cooled by adopting an outdoor natural cold source in a transition season and in a cold winter, the operating cost of air conditioning equipment can be greatly reduced, a fluorine pump air conditioner is usually adopted, a fluorine pump mode is started in winter, the operation of a compressor is stopped, a refrigerant is driven by a fluorine pump to realize heat pipe refrigeration operation, and the operating cost of the equipment is greatly reduced.
Split air conditioning units typically employ mechanically driven split heat pipes, such as fluorine pumps, e.g., liquid or air pumps, to drive the heat pipes. The heat pipe system and the heat pump system have two combination modes: 1) when the heat pipe and the heat pump share the system, a mode of parallel connection design of a throttling element and an electromagnetic valve is generally adopted. When the heat pump operates, the electromagnetic valve is closed, and the refrigerant performs pressure reduction operation through the throttling element; when the heat pipe operates, the electromagnetic valve is opened, and the refrigerant mainly passes through the electromagnetic valve with low resistance, so that the large resistance of the throttling element is prevented from consuming most gravity action or most mechanical lift of the fluorine pump. 2) The heat pipe and the heat pump are arranged in an independent system. The optimization and control of two independent systems are simple, and the two independent systems can be matched with each other to realize more flexible load matching, but the parts of the whole equipment are relatively more.
Disclosure of Invention
The invention aims to provide a heat pipe and refrigeration cycle composite system, refrigeration equipment and a control method, and provides a novel heat pipe and heat pump shared system. The technical effects that can be produced by the preferred technical scheme in the technical schemes provided by the invention are described in detail in the following.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention provides a heat pipe and refrigeration cycle combined system which comprises a compressor, a liquid pump, a condenser and an evaporator, wherein the compressor is connected with the condenser and the evaporator to form an injection type compression refrigeration cycle system, the liquid pump is connected with the condenser and the evaporator to form a heat pipe system, and the switching between the injection type compression refrigeration cycle system and the heat pipe system is realized by adjusting the opening and closing of a valve in the combined system.
Furthermore, a check valve and a stop valve are arranged on the compound system, and the check valve and the stop valve are used for switching the jet type compression refrigeration circulation system and the heat pipe system.
Further, the stop valve is arranged on a liquid inlet pipeline of the liquid pump.
Further, the compound system also comprises a gas-liquid separator and an ejector, wherein the inlet end of the ejector is connected with the outlet pipeline of the condenser and the outlet pipeline of the evaporator, and the outlet end of the ejector is connected with the inlet of the gas-liquid separator; and the liquid pump, the gas-liquid separator, the evaporator and the condenser are connected to form the heat pipe system.
Furthermore, an outlet pipeline of the evaporator is branched into a first outlet pipeline and a second outlet pipeline, the first outlet pipeline is connected with the ejector, and the second outlet pipeline is connected with an inlet pipeline of the condenser; the outlet pipeline of the condenser is branched into a third outlet pipeline and a fourth outlet pipeline, the third outlet pipeline is connected with the inlet end of the ejector, the fourth outlet pipeline is connected with the inlet end of the liquid pump, and a fifth outlet pipeline of the liquid pump is connected with a sixth outlet pipeline of the ejector and then is connected with the inlet end of the gas-liquid separator; the liquid outlet end of the gas-liquid separator is connected with the evaporator, and the gas outlet end of the gas-liquid separator is connected with the compressor; valves are arranged on the second outlet pipeline, the third outlet pipeline, the fourth outlet pipeline and the sixth outlet pipeline.
Further, the valves on the second outlet pipeline, the third outlet pipeline and the sixth outlet pipeline are one-way valves; and the valve on the fourth outlet pipeline is an electromagnetic valve.
Further, an expansion valve is arranged between the gas-liquid separator and the evaporator.
Further, a valve is arranged between the gas-liquid separator and the compressor; alternatively, no valve is provided between the gas-liquid separator and the compressor.
Further, an electric heating belt is arranged on the compressor.
The refrigerating equipment comprises the heat pipe and a refrigerating cycle compound system.
A control method of the heat pipe and refrigeration cycle compound system comprises the following steps: and adjusting the opening and closing of a valve in the composite system to start the jet type compression refrigeration cycle system or the heat pipe system.
Further, the method specifically comprises the following steps: when a heat pipe system is adopted for refrigeration, an electromagnetic valve on a liquid inlet pipe of the liquid pump is opened, the compressor is closed, the liquid pump is started, and a refrigerant discharged from the liquid pump flows back to the liquid pump through a gas-liquid separator, an expansion valve, an evaporator, a third one-way valve and a condenser in sequence; when the jet type compression refrigeration cycle system is used for refrigeration, the electromagnetic valve on the liquid inlet pipe of the liquid pump is closed, the compressor is started, the liquid pump is closed, the refrigerant discharged from the gas-liquid separator air outlet pipe flows to the ejector after passing through the compressor, the condenser and the first one-way valve, the refrigerant discharged from the gas-liquid separator liquid discharge pipe flows to the ejector after passing through the expansion valve and the evaporator, and the refrigerant discharged from the ejector flows to the gas-liquid separator through the second one-way valve.
Further, when the heat pipe system refrigeration is switched to the jet type compression refrigeration cycle system refrigeration, the electric heating belt on the compressor is started first, and the expansion valve is opened, so that liquid impact is prevented from occurring when the compressor is started.
The invention provides a heat pipe and refrigeration cycle composite system, which is realized by adding a liquid pump and valves (an electromagnetic valve and a one-way valve) at proper positions of a jet type compression refrigeration cycle system, and has the advantages of simple system modification and convenient operation and control.
The preferred technical scheme of the invention can at least produce the following technical effects:
before the liquid pump driving type heat pipe mode is converted into the compression refrigeration mode, the electric heating belt is started and heated for a certain time before the compressor is started, and the lubricating oil pool is heated to enable the liquid refrigerant to be gasified to force the liquid refrigerant in the suction pipe of the compressor to flow back to the gas-liquid separator, so that liquid impact is prevented from occurring when the compressor is started.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic connection diagram of a heat pipe and refrigeration cycle combined system according to an embodiment of the present invention.
FIG. 1-compressor; 2-liquid pump; 3-a condenser; 4-an evaporator; 5-a gas-liquid separator; 6-an ejector; 7-a first outlet line; 8-a second outlet line; 9-a third outlet line; 10-a fourth outlet line; 11-a fifth outlet line; 12-a sixth outlet line; 13-a first one-way valve; 14-a solenoid valve; 15-an expansion valve; 16-a second one-way valve; 17-third one-way valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides a heat pipe and refrigeration cycle combined system which comprises a compressor 1, a liquid pump 2, a condenser 3 and an evaporator 4, wherein the compressor 1 is connected with the condenser 3 and the evaporator 4 to form a jet compression refrigeration cycle system, the liquid pump 2 is connected with the condenser 3 and the evaporator 4 to form a heat pipe system, and the on-off of a valve in the combined system is adjusted to switch between the compression refrigeration cycle system and the heat pipe system. The invention realizes the composite system of the jet type compression refrigeration cycle system and the heat pipe system by adding the liquid pump 2 and the valves (the electromagnetic valve 14 and the one-way valve) at the proper positions of the jet type compression refrigeration cycle system, and the system is simple to transform and convenient to operate and control.
In the ejector-type compression refrigeration cycle system, the gas-liquid separator 5 serves as a gas-liquid separator common to both the heat pipe and the heat pump cycles, and the gas-liquid separator 5 can adjust the difference in the refrigerant circulation amount between the two cycles. The jet refrigeration cycle has higher energy efficiency, is beneficial to building a high-efficiency green data center, can further improve the annual energy efficiency of refrigeration equipment by being compounded with a fluorine pump heat pipe system, and has obvious energy-saving and emission-reducing effects.
As an optional implementation mode of the embodiment of the invention, the composite system is provided with a check valve and a stop valve, and the check valve and the stop valve are used for switching the jet compression refrigeration cycle system and the hot pipe system. The switching between the jet compression refrigeration cycle system and the heat pipe system is realized by adding the check valve and the stop valve at proper positions of the jet compression refrigeration cycle system, utilizing the opening and closing of the stop valve and utilizing the one-way conduction function of the check valve. The stop valve is preferably arranged on a liquid inlet pipeline of the liquid pump 2, when the combined system is in the injection type compression refrigeration cycle system for refrigeration, the stop valve (the electromagnetic valve 14) is in a closed state, and the refrigerant cannot flow into the liquid pump 2 through the liquid inlet pipeline of the liquid pump 2.
As an optional implementation manner of the embodiment of the present invention, referring to fig. 1, the composite system further includes a gas-liquid separator 5 and an ejector 6, an inlet end of the ejector 6 is connected to an outlet pipeline of the condenser 3 and an outlet pipeline of the evaporator 4, and an outlet end of the ejector 6 is connected to an inlet of the gas-liquid separator 5; and the liquid pump 2, the gas-liquid separator 5, the evaporator 4 and the condenser 3 are connected to form a heat pipe system.
The specific structure of the composite system may be as follows: an outlet pipeline of the evaporator 4 is branched into a first outlet pipeline 7 and a second outlet pipeline 8, the first outlet pipeline 7 is connected with the ejector 6, and the second outlet pipeline 8 is connected with an inlet pipeline of the condenser 3; an outlet pipeline of the condenser 3 is branched into a third outlet pipeline 9 and a fourth outlet pipeline 10, the third outlet pipeline 9 is connected with the inlet end of the ejector 6, the fourth outlet pipeline 10 is connected with the inlet end of the liquid pump 2, and a fifth outlet pipeline 11 of the liquid pump 2 is connected with a sixth outlet pipeline 12 of the ejector 6 and then is connected with the inlet end of the gas-liquid separator 5; the liquid outlet end of the gas-liquid separator 5 is connected with the evaporator 4, and the gas outlet end of the gas-liquid separator 5 is connected with the compressor 1; valves are provided on the second outlet line 8, the third outlet line 9, the fourth outlet line 10 and the sixth outlet line 12.
For convenience of operation and control, the valves on the second outlet pipeline 8, the third outlet pipeline 9 and the sixth outlet pipeline 12 are one-way valves; the valve on the fourth outlet line 10 is a solenoid valve 14. An expansion valve 15 is provided between the gas-liquid separator 5 and the evaporator 4.
The working principle of the composite system is explained as follows:
1) vapor compression injection refrigeration
High-temperature and high-pressure refrigerant gas discharged by the compressor 1 enters the condenser 3, the refrigerant releases heat to outdoor air and then is condensed into normal-temperature and high-pressure liquid, the normal-temperature and high-pressure liquid enters the ejector 6 through the first one-way valve 13, low-temperature and low-pressure refrigerant gas (low-pressure refrigerant gas from the outlet of the evaporator 4) is sucked from the injection port due to the induction effect, the mixed refrigerant enters the gas-liquid separator 5 through the second one-way valve 16, and the gas-phase refrigerant returns to the air suction port of the compressor 1 through the air outlet pipe to perform; the liquid refrigerant is throttled and depressurized again by the expansion valve 15 to become a two-phase low-temperature low-pressure refrigerant, flows to the evaporator 4, absorbs heat in the evaporator 4 to be evaporated into low-pressure gas, enters the injection port of the ejector 6, is mixed with the high-pressure refrigerant in the mixing section, and enters the gas-liquid separator 5 again to complete a refrigeration cycle. In this mode of operation, the solenoid valve is closed and the liquid pump stops operating.
2) Liquid pump driven heat pipe system refrigeration
The compressor 1 stops running, at the moment, the electromagnetic valve 14 is opened, the liquid pump 2 is started to pump the liquid refrigerant into the gas-liquid separator 5, the high-pressure liquid refrigerant in the gas-liquid separator 5 is adjusted by the expansion valve 15 and then enters the evaporator 4 to absorb heat, evaporate and gasify, the formed gaseous refrigerant enters the condenser 3 through the third one-way valve 17, is condensed and liquefied under the cooling action of outside cold air, and the liquid refrigerant at the outlet of the condenser 3 returns to the liquid suction port of the liquid pump 2 through the electromagnetic valve 14 to carry out the next cycle.
Obviously, the second check valve 16 and the first check valve 13 cannot be conducted under the action of reverse pressure difference during heat pipe circulation, so that a stopping effect is achieved; in addition, since the compression chamber itself is a hermetically closed cavity in the state where the compressor 1 stops operating, the refrigerant in the gas-liquid separator 5 cannot enter the condenser 3 through the compressor 1. In the liquid pump drive type heat pipe refrigeration mode, the gas-liquid separator 5 can adjust the refrigerant circulation amount, mainly by adjusting the opening degree of the expansion valve 15.
As an optional implementation manner of the embodiment of the invention, a valve is not arranged between the gas-liquid separator 5 and the compressor 1, and the gas outlet pipe of the gas-liquid separator 5 is directly connected with the compressor 1, because the compression chamber of the compressor 1 is a sealed and cut-off cavity in the state that the compressor 1 stops operating, the outlet of the compressor 1 does not need to be connected with a one-way valve in series; of course, a valve may be provided between the gas-liquid separator 5 and the compressor 1.
As an optional implementation manner of the embodiment of the present invention, an electric heating belt is disposed on the compressor 1. In the liquid pump driving type heat pipe refrigeration mode, low-pressure gas in the air suction pipeline of the compressor 1 is pressed by high pressure in the gas-liquid separator 5 and stores a part of liquid refrigerant, when the heat pipe system stops, part of liquid refrigerant returns to the gas-liquid separator 5 from the air suction pipeline of the compressor 1 after the system pressure is balanced, but due to the bent arrangement and other structures of the actual pipeline of the refrigeration system, part of liquid refrigerant may still be left on the air suction pipeline. In order to prevent liquid impact when the compressor 1 is started, before the liquid pump driving type heat pipe mode is switched to the compression refrigeration mode, the electric heating belt of the compressor is required to be started to heat (the lubricating oil pool is heated so that liquid refrigerant is gasified, and the liquid refrigerant in the suction pipe of the compressor 1 is forced to flow back to the gas-liquid separator 5), and meanwhile, the opening degree of the expansion valve 15 is opened to the maximum.
A refrigerating device comprises a heat pipe and a refrigerating cycle compound system. The refrigeration cycle is preferably an injection refrigeration cycle, the injection refrigeration cycle has high energy efficiency, the construction of a high-efficiency green data center is facilitated, the annual energy efficiency of the refrigeration equipment can be further improved by compounding with a fluorine pump heat pipe system, and the energy-saving and emission-reducing effects are obvious.
A control method of a heat pipe and refrigeration cycle combined system comprises the following steps: the valve in the composite system is adjusted to open and close to start the jet compression refrigeration cycle system or the heat pipe system. The method specifically comprises the following steps:
when the heat pipe system is adopted for refrigeration, the electromagnetic valve 14 on the liquid inlet pipe of the liquid pump 2 is opened, the compressor 1 is closed, the liquid pump 2 is started, and the refrigerant discharged from the liquid pump 2 flows back to the liquid pump 2 through the gas-liquid separator 5, the expansion valve 15, the evaporator 4, the third one-way valve 17 and the condenser 3 in sequence;
when the jet type compression refrigeration cycle system is used for refrigeration, the electromagnetic valve 14 on the liquid inlet pipe of the liquid pump 2 is closed, the compressor 1 is started, the liquid pump 2 is closed, the refrigerant discharged from the gas outlet pipe of the gas-liquid separator 5 flows to the ejector 6 after passing through the compressor 1, the condenser 3 and the first one-way valve 13, the refrigerant discharged from the liquid outlet pipe of the gas-liquid separator 5 flows to the ejector 6 through the expansion valve 15 and the evaporator 4, and the refrigerant discharged from the ejector 6 flows to the gas-liquid separator 5 through the second one-way valve 16.
As an optional implementation manner of the embodiment of the present invention, when the heat pipe system refrigeration is switched to the injection compression refrigeration cycle system refrigeration, the electric heating belt on the compressor 1 is started first, and the expansion valve 15 is opened to prevent liquid impact when the compressor 1 is started. The mode switching control performs the following actions (switching from heat pipe system refrigeration to ejector compression refrigeration cycle system refrigeration):
1) the liquid pump 2 is stopped, the electromagnetic valve 14 is closed, the opening degree of the expansion valve 15 is opened to the maximum, the electric heating belt of the compressor starts heating (the lubricating oil pool is heated to gasify the liquid refrigerant so as to force the liquid refrigerant in the suction pipe of the compressor to flow back to the gas-liquid separator), and the state is maintained for the time t1, so that the high pressure and the low pressure of the refrigerating system are balanced as soon as possible.
2) After the time t1 is over, the opening of the expansion valve 15 is reset to the default opening under the vapor compression injection refrigeration mode, the liquid pump 2 and the electromagnetic valve 14 are kept in the closed state, the inner fan (blowing to the evaporator 4) and the outer fan (blowing to the condenser 3) are ensured to run for t2 time, then the compressor 1 is started to run the vapor compression injection refrigeration cycle, and then the opening of the expansion valve 15, the rotating speed of the fan, the frequency of the compressor and the like are automatically adjusted according to the control function under the mode.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (13)
1. A heat pipe and refrigeration cycle compound system is characterized by comprising a compressor (1), a liquid pump (2), a condenser (3) and an evaporator (4),
the compressor (1) is connected with the condenser (3) and the evaporator (4) to form an injection type compression refrigeration cycle system, the liquid pump (2) is connected with the condenser (3) and the evaporator (4) to form a heat pipe system, and the on-off of a valve in the composite system is adjusted to switch between the injection type compression refrigeration cycle system and the heat pipe system.
2. A heat pipe and refrigeration cycle compound system as recited in claim 1 wherein a check valve and a stop valve are provided on said compound system, said check valve and said stop valve being used to switch said ejector compression refrigeration cycle system and said heat pipe system.
3. A heat pipe and refrigeration cycle complex system according to claim 2, characterized in that the stop valve is provided on the inlet conduit of the liquid pump (2).
4. A heat pipe and refrigeration cycle complex system according to any one of claims 1 to 3, characterized in that the complex system further comprises a gas-liquid separator (5) and an ejector (6), wherein the inlet end of the ejector (6) is connected with the outlet pipeline of the condenser (3) and the outlet pipeline of the evaporator (4), and the outlet end of the ejector (6) is connected with the inlet of the gas-liquid separator (5); and the liquid pump (2), the gas-liquid separator (5), the evaporator (4) and the condenser (3) are connected to form the heat pipe system.
5. The heat pipe and refrigeration cycle complex system according to claim 4, wherein the outlet line of the evaporator (4) is branched into a first outlet line (7) and a second outlet line (8), the first outlet line (7) is connected with the ejector (6), and the second outlet line (8) is connected with the inlet line of the condenser (3);
an outlet pipeline of the condenser (3) is branched into a third outlet pipeline (9) and a fourth outlet pipeline (10), the third outlet pipeline (9) is connected with the inlet end of the ejector (6), the fourth outlet pipeline (10) is connected with the inlet end of the liquid pump (2), and a fifth outlet pipeline (11) of the liquid pump (2) is connected with a sixth outlet pipeline (12) of the ejector (6) and then is connected with the inlet end of the gas-liquid separator (5);
the liquid outlet end of the gas-liquid separator (5) is connected with the evaporator (4), and the gas outlet end of the gas-liquid separator (5) is connected with the compressor (1);
valves are arranged on the second outlet pipeline (8), the third outlet pipeline (9), the fourth outlet pipeline (10) and the sixth outlet pipeline (12).
6. The heat pipe and refrigeration cycle complex system according to claim 5, wherein the valves on the second outlet line (8), the third outlet line (9) and the sixth outlet line (12) are one-way valves;
the valve on the fourth outlet line (10) is a solenoid valve (14).
7. The heat pipe and refrigeration cycle complex system according to claim 5, wherein an expansion valve (15) is provided between the gas-liquid separator (5) and the evaporator (4).
8. The heat pipe and refrigeration cycle complex system according to claim 5, wherein a valve is provided between the gas-liquid separator (5) and the compressor (1); alternatively, no valve is provided between the gas-liquid separator (5) and the compressor (1).
9. The heat pipe and refrigeration cycle complex system according to claim 8, wherein an electric heating belt is provided on the compressor (1).
10. A refrigeration apparatus comprising the heat pipe and refrigeration cycle complex system as recited in any one of claims 1 to 9.
11. A control method for a heat pipe and refrigeration cycle complex system according to any one of claims 1 to 9, comprising the following steps:
and adjusting the opening and closing of a valve in the composite system to start the jet type compression refrigeration cycle system or the heat pipe system.
12. The control method according to claim 11, characterized by specifically comprising the following:
when a heat pipe system is adopted for refrigeration, an electromagnetic valve (14) on a liquid inlet pipe of the liquid pump (2) is opened, the compressor (1) is closed, the liquid pump (2) is started, and a refrigerant discharged from the liquid pump (2) flows back to the liquid pump (2) through a gas-liquid separator (5), an expansion valve (15), an evaporator (4), a third one-way valve (17) and a condenser (3) in sequence;
when the jet type compression refrigeration cycle system is used for refrigeration, the electromagnetic valve (14) on the liquid inlet pipe of the liquid pump (2) is closed, the compressor (1) is started, the liquid pump (2) is closed, the refrigerant discharged from the gas-liquid separator (5) gas outlet pipe flows to the ejector (6) after passing through the compressor (1), the condenser (3) and the first one-way valve (13), the refrigerant discharged from the gas-liquid separator (5) liquid discharge pipe flows to the ejector (6) through the expansion valve (15), and the refrigerant discharged from the ejector (6) flows to the gas-liquid separator (5) through the second one-way valve (16).
13. The control method according to claim 12, wherein when switching from the heat pipe system refrigeration to the ejector compression refrigeration cycle system refrigeration, an electric heating belt on a compressor (1) is started first, and an expansion valve (15) is opened for preventing liquid slugging from occurring when starting the compressor (1).
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| CN202011026431.7A CN112082286A (en) | 2020-09-25 | 2020-09-25 | Heat pipe and refrigeration cycle composite system, refrigeration equipment and control method |
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| CN202011026431.7A CN112082286A (en) | 2020-09-25 | 2020-09-25 | Heat pipe and refrigeration cycle composite system, refrigeration equipment and control method |
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|---|---|---|---|---|
| US20030140651A1 (en) * | 2002-01-30 | 2003-07-31 | Hirotsugu Takeuchi | Refrigerant cycle system with ejector pump |
| JP2004239493A (en) * | 2003-02-05 | 2004-08-26 | Denso Corp | Heat pump cycle |
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