CN109539671A - A kind of refrigeration system - Google Patents
A kind of refrigeration system Download PDFInfo
- Publication number
- CN109539671A CN109539671A CN201811231084.4A CN201811231084A CN109539671A CN 109539671 A CN109539671 A CN 109539671A CN 201811231084 A CN201811231084 A CN 201811231084A CN 109539671 A CN109539671 A CN 109539671A
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- refrigeration system
- refrigerating
- refrigeration
- heat exchanger
- refrigerating medium
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- 238000005057 refrigeration Methods 0.000 title claims abstract description 107
- 239000007788 liquid Substances 0.000 claims abstract description 33
- 239000012530 fluid Substances 0.000 claims abstract description 31
- 238000003860 storage Methods 0.000 claims abstract description 10
- 230000004087 circulation Effects 0.000 claims abstract description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 26
- 239000007789 gas Substances 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 16
- 229910052757 nitrogen Inorganic materials 0.000 claims description 13
- 238000009835 boiling Methods 0.000 claims description 9
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 8
- 235000011089 carbon dioxide Nutrition 0.000 claims description 8
- 238000012360 testing method Methods 0.000 claims description 7
- 238000007710 freezing Methods 0.000 claims description 6
- 230000008014 freezing Effects 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 5
- 239000012774 insulation material Substances 0.000 claims description 4
- 239000003344 environmental pollutant Substances 0.000 description 11
- 231100000719 pollutant Toxicity 0.000 description 11
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 239000000463 material Substances 0.000 description 6
- 238000002679 ablation Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 4
- 230000000474 nursing effect Effects 0.000 description 4
- 238000011160 research Methods 0.000 description 4
- 239000003795 chemical substances by application Substances 0.000 description 3
- 239000002826 coolant Substances 0.000 description 3
- 238000001704 evaporation Methods 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 239000003507 refrigerant Substances 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 206010028980 Neoplasm Diseases 0.000 description 2
- OFBQJSOFQDEBGM-UHFFFAOYSA-N Pentane Chemical compound CCCCC OFBQJSOFQDEBGM-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000001815 facial effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000000809 air pollutant Substances 0.000 description 1
- 231100001243 air pollutant Toxicity 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 210000000601 blood cell Anatomy 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000002681 cryosurgery Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 239000006260 foam Substances 0.000 description 1
- 208000021760 high fever Diseases 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- RGSFGYAAUTVSQA-UHFFFAOYSA-N pentamethylene Natural products C1CCCC1 RGSFGYAAUTVSQA-UHFFFAOYSA-N 0.000 description 1
- 125000004817 pentamethylene group Chemical group [H]C([H])([*:2])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[*:1] 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 1
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 210000003491 skin Anatomy 0.000 description 1
- 230000002792 vascular Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D16/00—Devices using a combination of a cooling mode associated with refrigerating machinery with a cooling mode not associated with refrigerating machinery
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/02—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating liquids, e.g. brine
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
- F25D19/04—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors with more than one refrigeration unit
-
- 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
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention provides a kind of refrigeration system, the refrigerating medium circulation loop being formed by connecting including fluid reservoir, thermic load, First Heat Exchanger and circulating pump, it further include the cryogenic refrigerating system for acting on the First Heat Exchanger and the gas liquefaction refrigeration system for acting on the fluid reservoir, the refrigerating medium of the fluid reservoir storage gaseous state and/or liquid, the gas liquefaction refrigeration system includes the second heat exchanger in the fluid reservoir, and second heat exchanger cools down to generate the refrigerating medium of liquid the gaseous refrigerating medium in the fluid reservoir.It is arranged such, two kinds of refrigerating mediums of gaseous state and liquid can be used, solve limitation of the operation temperature area of common refrigeration system by refrigeration principle and refrigerating medium self character, refrigeration temperature area is narrow, refrigeration system stability is poor, is difficult to make the problem of variation is to adapt to different warm area refrigerating environments, and the low temperature for covering wider warm area can be provided by, which having the advantages that, adapts to thermic load difference warm area refrigerating environment requirement with ultra-low temperature surroundings.
Description
Technical field
The present invention relates to low-temperature refrigeration technology fields, and in particular to a kind of refrigeration system.
Background technique
(storages of such as different biological tissues), cryosurgery, cryogenic science instrument (material property under low temperature are stored in low temperature
Test), cryogenic science research, the fields such as deep-sea fishing and gas liquefaction, often need metastable low temperature or even ultralow
Warm environment.
It is using most refrigeration systems at present: a) is carried out using dry ice (warm area: -79 DEG C) and liquid nitrogen (warm area: -196 DEG C)
Refrigeration, but need to be continuously replenished both substances；Or b) using other circulations of electricity refrigeration, including semiconductor refrigerating and compression system
Cooling system (superposition type or mixed working fluid).
But the refrigeration system freezed using dry ice or liquid nitrogen, it is limited by refrigerating medium self-characteristic, this system
Cooling system can only carry out in certain warm area, it is difficult to and the worst cold case needed for realizing in different application, applicability is poor,
And using when need to be continuously replenished dry ice or liquid nitrogen；By the way of compression refrigeration, when required working temperature is lower, meeting
Leading to the refrigerating efficiency, gas transmission coefficient and evaporating pressure of compression refrigerating system reduces, and penetrates into the possibility of system in low-pressure end air
Property will increase, and will lead to system when serious does not freeze, and there is a problem of that system stability is poor；In addition, working as required working temperature
When further decreasing, single stage compress throttling refrigeration circulation is difficult to meet required low temperature, in engineering frequently with two stages of compression among
Cooling, low-temperature mixed-refrigerants throttling refrigeration (Auto-cascade cycle system) or two single-stage vapor compression refrigeration cycle overlapping (classical overlappings
System) method obtain low temperature, however that there are temperature fall times is long, cooling system amount is small, system is stable for common cascade system
Property poor, Energy Efficiency Ratio it is low and the features such as influenced vulnerable to environmental working condition.In addition to this, when Auto-cascade cycle system is revealed, work is mixed
Matter each component content, which changes, causes the variation of evaporating pressure and evaporating temperature, need to vacuumize to refrigeration system and match again
Than, perfusion mixed working fluid, increase the maintenance difficulty and maintenance cost of unit.
In conclusion it is not difficult to find that existing refrigeration system only has a kind of refrigeration principle, and operation temperature area system
The limitation of cold principle and working medium self character, that there are refrigeration temperature areas is narrow, refrigeration system stability is poor, is difficult to make variation to adapt to
The problem of different warm area refrigerating environments.
Summary of the invention
Therefore, the technical problem to be solved in the present invention is that overcoming the operation temperature area system of refrigeration system in the prior art
The limitation of cold principle and refrigerating medium self character, refrigeration temperature area is narrow, refrigeration system stability is poor, is difficult to make variation to adapt to not
The problem of with warm area refrigerating environment.
To achieve the above object, the present invention provides a kind of refrigeration systems: including fluid reservoir, thermic load, First Heat Exchanger
The refrigerating medium circulation loop being formed by connecting with circulating pump further includes the cryogenic refrigerating system and work for acting on the First Heat Exchanger
For the gas liquefaction refrigeration system of the fluid reservoir, the refrigerating medium of the fluid reservoir storage gaseous state and/or liquid is described
Gas liquefaction refrigeration system includes the second heat exchanger in the fluid reservoir, and second heat exchanger is in the fluid reservoir
The gaseous refrigerating medium cooled down to generate the refrigerating medium of liquid.
Preferably, the cryogenic refrigerating system includes Cryo Refrigerator, and the cold head of the Cryo Refrigerator acts on described
First Heat Exchanger is to carry out heat exchange.
Preferably, the cold head of the First Heat Exchanger and the Cryo Refrigerator is an integral structure.
Preferably, the Cryo Refrigerator is the refrigeration machine that can produce the cryogenic temperature of liquid nitrogen temperature.
Preferably, the Cryo Refrigerator is separate unit or multiple chillers serial or parallel connection.
Preferably, the gas liquefaction refrigeration system includes that the second refrigeration of cooling circuit is constituted with second heat exchanger
Machine.
Preferably, second refrigeration machine is refrigeration system of the cryogenic temperature lower than the boiling point of the refrigerating medium.
Preferably, the periphery of the thermic load is thermally shielded using thermal insulation material.
Preferably, the thermic load is low temperature refrigerator, biological tissue's storage device, cryogenic testing case or low temperature Electronic Speculum.
Preferably, for the cryogenic temperature needed for the thermic load at liquid nitrogen temperature, it is gas that the refrigerating medium, which is under room temperature,
State and freezing point are lower than the substance of cryogenic temperature；The cryogenic temperature needed for the thermic load is in dry ice warm area, the refrigerating
Agent is under room temperature be liquid substance.
Technical solution of the present invention compared with the existing technology, has the advantages that
1. a kind of refrigeration system provided by the invention can use different refrigeratings according to the warm area environment needed for refrigeration
Agent, and in such a way that gas liquefaction refrigeration system and cryogenic refrigerating system cooperation are freezed, gaseous coolant can be used
The work of existing refrigeration system is overcome to provide the low temperature and ultra-low temperature surroundings for covering wider warm area with liquid refrigerating medium
Warm area is limited by refrigeration principle and refrigerating medium self character and there is a problem of that refrigeration temperature area is narrow, can make variation with suitable
Answer the requirement of thermic load difference warm area refrigerating environment.
2. a kind of refrigeration system provided by the invention, with common compression refrigeration (superposition type or mixed working fluid) system phase
Than the equipment volume of this refrigeration system is relatively small, can save big quantity space, expands it and uses field；
3. a kind of refrigeration system provided by the invention, high stability when Cryo Refrigerator system is run, and can be with
Multiple chillers are connected to guarantee to provide enough refrigerating capacitys to thermic load, improves the stability of refrigeration system；
4. a kind of refrigeration system provided by the invention controls refrigerating medium circulation loop by circulating pump and provides not to thermic load
Same refrigerating capacity, can satisfy the use demand of different occasions；
5. a kind of refrigeration system provided by the invention, equipment volume is smaller and using having nonmetallic pipeline flexible, makes
Cooling system and thermic load can be split, and complete equipment can be with flexible arrangement, to meet the needs of different usage scenarios.
Detailed description of the invention
It, below will be to specific in order to illustrate more clearly of the specific embodiment of the invention or technical solution in the prior art
Embodiment or attached drawing needed to be used in the description of the prior art be briefly described, it should be apparent that, it is described below
Attached drawing is some embodiments of the present invention, for those of ordinary skill in the art, before not making the creative labor
It puts, is also possible to obtain other drawings based on these drawings.
Fig. 1 is the refrigerant system configurations schematic diagram provided in the first embodiment of the invention；
Fig. 2 is the refrigerant system configurations schematic diagram provided in second of embodiment of the invention.
Appended drawing reference: 1, fluid reservoir；2, thermic load；3, First Heat Exchanger；4, circulating pump；5, cryogenic refrigerating system；51, low
Warm refrigeration machine；6, gas liquefaction refrigeration system；61, the second heat exchanger；62, the second refrigeration machine；7, refrigerating medium.
Specific embodiment
Technical solution of the present invention is clearly and completely described below in conjunction with attached drawing, it is clear that described implementation
Example is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill
Personnel's every other embodiment obtained without making creative work, shall fall within the protection scope of the present invention.
The present invention provides a kind of refrigeration systems, as shown in Figure 1, the refrigeration system include: by fluid reservoir 1, circulating pump 4,
The refrigerating medium circulation loop that First Heat Exchanger 3 and thermic load 2 are connected in sequence by nonmetallic pipeline；Act on the first heat exchange
The cryogenic refrigerating system 5 of device 3；And act on the gas liquefaction refrigeration system 6 of fluid reservoir 1.Wherein, storage in fluid reservoir 1
There are gaseous state and the refrigerating medium of liquid 7, gas liquefaction refrigeration system 6 includes the second heat exchanger 61 in fluid reservoir 1, and second changes
Hot device 61 cools down the gaseous coolant 7 in fluid reservoir 1 to generate the refrigerating medium 7 of liquid.
When the refrigerating medium 7 in fluid reservoir 1 is at normal temperature gaseous state, gas liquefaction refrigeration system 6 passes through the second heat exchanger
Gaseous refrigerating medium 7 is cooled down to generate the refrigerating medium 7 of liquid in 61 pairs of fluid reservoirs 1, and refrigerating medium 7 is accumulated in fluid reservoir 1
It is extracted out behind bottom by circulating pump 4, refrigerating medium 7 is cooled to required work by cryogenic refrigerating system 5 after being transported in First Heat Exchanger 3
Make warm area and is delivered to thermic load 2 again.When the refrigerating medium 7 in fluid reservoir 1 is at normal temperature liquid, refrigerating medium 7 is directly recycled
Pump 4 is retracted to First Heat Exchanger 3 and is cooled down by cryogenic refrigerating system 5.
Refrigeration system provided by the invention can use different refrigeratings according to the operation temperature area environment needed for refrigeration, selection
Agent 7, and cooled down by gas liquefaction refrigeration system 6 and the cooperation of cryogenic refrigerating system 5 to refrigerating medium 7, so as to provide
The low temperature and ultra-low temperature surroundings for covering wider warm area overcome the operation temperature area of existing refrigeration system by refrigeration principle and load
7 self character of cryogen limits and there is a problem of that refrigeration temperature area is narrow, is adapted to wanting for the different warm area refrigerating environments of thermic load 2
It asks.
Referring to FIG. 1, cryogenic refrigerating system 5 includes Cryo Refrigerator 51, the cold head of Cryo Refrigerator 51 acts on first
Heat exchanger 3 is to carry out heat exchange.Wherein, the cold head of Cryo Refrigerator 51 and First Heat Exchanger 3 can separate structure, be also integral type
Structure.Cryo Refrigerator 51 is the refrigeration machine that can produce the cryogenic temperature of liquid nitrogen temperature, such as hot sound refrigerating machine, stirling refrigeration
Machine, vascular refrigerator and GM refrigeration machine.Cryo Refrigerator 51 is by First Heat Exchanger 3 to the load in refrigerating medium circulation loop
Cryogen 7 cools down, with operation temperature area needed for meeting thermic load 2.
Wherein, Cryo Refrigerator 51 is separate unit or multiple chillers serial or parallel connection, is designed in this way Cryo Refrigerator 51
Arrangement is more flexible, can satisfy the operating temperature demand under varying environment.And the refrigerating capacity needed for the thermic load 2 it is larger,
It is very fast using the concatenated mode cooling rate of multiple chillers when the temperature of refrigeration temperature area is lower, Cryo Refrigerator can be reduced
51 cool to refrigerating medium 7 time of operation temperature area, to guarantee to provide enough refrigerating capacitys to thermic load 2, improve refrigeration system
The stability of system.
Circulating pump 4 can control refrigerating medium circulation loop and provide different refrigerating capacitys to thermic load 2, can satisfy different fields
The use demand of conjunction, it is easily controllable.
Gas liquefaction refrigeration system 6 includes the second refrigeration machine 62 that cooling circuit is constituted with the second heat exchanger 61.Second system
Cold 62 is refrigeration system of the cryogenic temperature lower than 7 boiling point of refrigerating medium in fluid reservoir 1, such as single-stage or the steam compression type system of multistage
Cooling system serial or parallel connection.
In present embodiment, the heat-insulated mode that thermic load 2 is taken is that periphery packet is thermally shielded using thermal insulation material, thermal insulating material
Material is specially high fever choke gel thermal insulation material, can reduce thermic load 2 and extraneous heat exchange as far as possible in this way.In other realities
It applies in mode, the adiabatic method that thermic load 2 can also use has high vacuum to add protective shield of radiation insulation, high-vacuum insulation, Yi Jiju
Urethane, the insulation of pentamethylene high-pressure foam.
When the operation temperature area needed for thermic load 2 is in liquid nitrogen temperature (- 196 DEG C), wherein the refrigerating medium 7 in fluid reservoir 1 is adopted
Be gaseous state when with room temperature, cryogenic temperature is higher than its freezing point, but is lower than the refrigerating medium 7 of its boiling point, can specifically select fusing point be-
187 DEG C, the propane or fusing point that boiling point is -42 DEG C are -185 DEG C, the propylene that boiling point is -47 DEG C.Gas liquefaction refrigeration system 6 is logical
The second heat exchanger 61 is crossed to cool down the gaseous coolant 7 in fluid reservoir 1 to generate liquid refrigerating medium 7,7 quilt of liquid refrigerating medium
Circulating pump 4 is retracted to First Heat Exchanger 3, and cryogenic refrigerating system 5 acts on First Heat Exchanger 3 and is further cooled to refrigerating medium 7
Liquid nitrogen temperature is delivered to thermic load 2, to meet thermic load 2 to the operating temperature demand of liquid nitrogen temperature.
When the operation temperature area needed for thermic load 2 is in dry ice warm area (- 79 DEG C), refrigerating medium 7 is higher than using cryogenic temperature should
The freezing point of refrigerating medium 7 but is below the refrigerating medium 7 under the boiling point of the refrigerating medium 7 and normal temperature and pressure for liquid, is specifically as follows
Pentane (fusing point is -129 DEG C, and boiling point is 36 DEG C) or ethyl alcohol (fusing point is -114 DEG C, and boiling point is 78 DEG C).Liquid refrigerating medium 7 is not
It needs first to liquefy, the middle gas liquefaction refrigeration system 6 of refrigeration system stops working, and (or entire refrigeration system does not install gas liquefaction
Refrigeration system 6), liquid refrigerating medium 7 is retracted to First Heat Exchanger 3 by circulating pump 4, and cryogenic refrigerating system 5 acts on the first heat exchange
Refrigerating medium 7 is cooled to dry ice warm area by device 3, is delivered to thermic load 2, to meet thermic load 2 to the operating temperature need of dry ice warm area
It asks.
When being studied using scanning electron microscope, due to the sensibility of instrument itself, need to carry out rapidly sample sections
It is cooling, it is allowed to guarantee that the water in sample sections is in glassy state while form is fixed, reuses scanning electron microscope and carry out structure view
It examines.The refrigeration system can be applied in low temperature Electronic Speculum, i.e., thermic load 2 is low temperature Electronic Speculum.Using being gaseous under normal temperature and pressure
Refrigerating medium 7 is first liquefied by gas liquefaction refrigeration system 6 and cryogenic refrigerating system 5 and further cools to institute by refrigerating medium 7
Sample sections are first placed in rapid freezing in liquid nitrogen, then sample sections are placed in electricity when low temperature Electronic Speculum works by the operation temperature area needed
In low temperature cold bench in mirror, subsequent start-up Electronic Speculum observes sample sections.
In cryogenic science research, need to store article using ultra low temperature freezer, low temperature refrigerator currently on the market is general
It is very unstable to accomplish -196 DEG C of liquid nitrogen temperatures, which can be applied in ultra low temperature freezer, provide -196 DEG C
Stablize ultralow temperature storage environment.I.e. thermic load 2 is ultra low temperature freezer.Thermoacoustic refrigeration can be used in cryogenic refrigerating system 5 therein
Machine uses one or more hot sound refrigerating machine according to cooling capacity needs.
In biomedical research, it is sometimes desirable to using ultra-low temperature surroundings save biological tissue, as cell, blood, organ,
Skin etc..These biological tissue's volumes are not big, but need continual and steady ultra-low temperature surroundings, otherwise may will affect its work
Property.The refrigeration system of the structure can be used for the scene, and thermic load 2 is ultralow temperature biological tissue storage tank or storage cabinet.
Cryogenic testing case is the material properties test equipment of the fields such as aviation, electric appliance, scientific research indispensability, the refrigeration of the structure
System can be applied to the scene.When cryogenic testing case works, need to set up the clamping of measured material and material, measuring machine
Under high temperature, ultralow temperature or varying temperature environment, using this refrigeration equipment, thermic load 2 is designed to reasonable pattern, with measuring instrument
Device combination, high temperature, low temperature or varying temperature environment needed for can providing measurement, meets the material properties test demand of client.
Field is monitored in air pollutants, needs to measure the concentration of pollutants in air, the refrigeration system of the structure is available
In the scene.Since the concentration of pollutants in air is very low, in order to measure these pollutant concentration numerical value, need first from by
These gas pollutants are trapped in the dry air of pollution, this just needs ultra-low temperature surroundings (- 150 DEG C) to condense these pollutants
Enrichment, it is to be concentrated to after to a certain degree, then so that it is volatilized into gaseous state by heating, at this point, pollutant concentration, which is promoted to, to be surveyed
Amount degree, then these tested gases enter subsequent measuring device, and concentration can be measured.
In this scenario, cooling capacity is directly provided by cryogenic refrigerating system 5,3 surface temperature of First Heat Exchanger is reduced to-
150 DEG C, when the dry air containing pollutant passes through 3 inside of First Heat Exchanger, these pollutants are enriched in by moment condensation
Inside First Heat Exchanger 3, after these pollutants are concentrated into a certain degree, by heating to First Heat Exchanger 3, make it quickly
150 DEG C are warming up to, is set to be able to the pollutant of all enrichment methods in the inside of First Heat Exchanger 3 to be volatized into subsequent measurement
Standby, in measuring device, the concentration of these pollutants is measured.
The refrigeration system of the structure can be used for realizing the whole immersion low temperature nursing of human body, and thermic load 2 is that a people is high
Bulk containers.In use, have in bulk containers by cryogenic refrigerating system 5 convey Lai low temperature liquid refrigerating medium 7, bulk containers temperature
Spend lower, by after this part care appliances and body local skin attachement, the skin temperature being bonded is reduced rapidly, and realizes nursing
Purpose.According to specific requirements, thermic load 2 therein can be designed as including but not limited to bandage type, patch type, facial mask formula
Etc. different patterns.Wherein, bandage type thermic load 2 is suitable for the fixed cooling nursing of human limb, and patch type thermic load 2 is applicable in
In the cooling nursing of human body flat skin surface, and facial mask formula thermic load 2 is nursed especially suitable for the cooling of human body face.
In field of biomedicine, sufficiently low temperature can be by ablation of tissue, therefore cryogenic freezing ablation is a kind of disease
The refrigeration system for the treatment of means, the structure can be applied to the surgical device of this scene.In use, 2 quilt of thermic load
It is designed as special construction, low temperature or ultralow temperature refrigerating medium 7 flow through thermic load 2, so that it may which the tissue contacted with thermic load 2 disappears
Melt.According to the different situations of destination organization, thermic load 2 can be designed as different patterns, to meet the purpose for the treatment of disease.Heat
The specific pattern of load 2 includes but is not limited to following pattern: centralization: spherical, aciculiform；It is distributed: spiral shape, umbrella shape, triangle,
Polygon etc..Wherein, spherical thermic load 2 is usually used in the ablation of cavity, and aciculiform thermic load 2 is usually used in fat, tumour and other groups
Ablation is knitted, umbrella shape thermic load 2 is usually used in tumor tissues ablation.
In conclusion a kind of refrigeration system provided by the invention, can use difference according to the warm area environment needed for refrigeration
Refrigerating medium 7, and by gas liquefaction refrigeration system 6 and cryogenic refrigerating system 5 cooperation cool down to refrigerating medium 7, so as to
To provide the low temperature and ultra-low temperature surroundings of covering wider warm area, it is adapted to the requirement of the different warm area refrigerating environments of thermic load 2；And
And Cryo Refrigerator 51 can according to need and carry out serial or parallel connection using more hot sound refrigerating machines, it is ensured that provide enough
Refrigerating capacity, refrigeration system stability is high.
Obviously, the above embodiments are merely examples for clarifying the description, and does not limit the embodiments.It is right
For those of ordinary skill in the art, can also make on the basis of the above description it is other it is various forms of variation or
It changes.There is no necessity and possibility to exhaust all the enbodiments.And it is extended from this it is obvious variation or
It changes still within the protection scope of the invention.
Claims (10)
1. a kind of refrigeration system, which is characterized in that including fluid reservoir (1), thermic load (2), First Heat Exchanger (3) and circulating pump
(4) the refrigerating medium circulation loop being formed by connecting, further include act on the First Heat Exchanger (3) cryogenic refrigerating system (5) and
Act on the gas liquefaction refrigeration system (6) of the fluid reservoir (1), fluid reservoir (1) the storage gaseous state and/or liquid it is described
Refrigerating medium (7), the gas liquefaction refrigeration system (6) includes the second heat exchanger (61) in the fluid reservoir (1), described
Second heat exchanger (61) cools down to generate described in liquid the gaseous refrigerating medium (7) in the fluid reservoir (1)
Refrigerating medium (7).
2. refrigeration system according to claim 1, which is characterized in that the cryogenic refrigerating system (5) includes cryogenic refrigeration
Machine (51), the cold head of the Cryo Refrigerator (51) act on the First Heat Exchanger (3) to carry out heat exchange.
3. refrigeration system according to claim 2, which is characterized in that the First Heat Exchanger (3) and the cryogenic refrigeration
The cold head of machine (51) is an integral structure.
4. refrigeration system according to claim 2, which is characterized in that the Cryo Refrigerator (51) is that can produce liquid nitrogen temperature
The refrigeration machine of the cryogenic temperature in area.
5. refrigeration system according to claim 4, which is characterized in that the Cryo Refrigerator (51) is separate unit or more systems
Cold serial or parallel connection.
6. refrigeration system according to any one of claims 1-5, which is characterized in that the gas liquefaction refrigeration system
It (6) include the second refrigeration machine (62) that cooling circuit is constituted with second heat exchanger (61).
7. refrigeration system according to claim 6, which is characterized in that second refrigeration machine (62) is lower than for cryogenic temperature
The refrigeration system of the boiling point of the refrigerating medium (7).
8. refrigeration system according to claim 1, which is characterized in that the periphery of the thermic load (2) uses thermal insulation material
It is thermally shielded.
9. refrigeration system according to claim 1, which is characterized in that the thermic load (2) is low temperature refrigerator, biological tissue
Storage device, cryogenic testing case or low temperature Electronic Speculum.
10. refrigeration system according to claim 1, which is characterized in that the cryogenic temperature needed for the thermic load (2) exists
When liquid nitrogen temperature, it is substance that gaseous state and freezing point are lower than cryogenic temperature that the refrigerating medium (7), which is under room temperature,；When the thermic load
(2) cryogenic temperature needed in dry ice warm area, the refrigerating medium (7) is under room temperature be liquid substance.
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