CN203132192U - J-T throttle cooling cycle system driven by low-temperature linear compressor - Google Patents
J-T throttle cooling cycle system driven by low-temperature linear compressor Download PDFInfo
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- CN203132192U CN203132192U CN201320033469.6U CN201320033469U CN203132192U CN 203132192 U CN203132192 U CN 203132192U CN 201320033469 U CN201320033469 U CN 201320033469U CN 203132192 U CN203132192 U CN 203132192U
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- 238000001816 cooling Methods 0.000 title abstract description 19
- 238000005057 refrigeration Methods 0.000 claims description 72
- 239000001307 helium Substances 0.000 claims description 42
- 229910052734 helium Inorganic materials 0.000 claims description 42
- SWQJXJOGLNCZEY-UHFFFAOYSA-N helium atom Chemical compound [He] SWQJXJOGLNCZEY-UHFFFAOYSA-N 0.000 claims description 42
- 239000003795 chemical substances by application Substances 0.000 claims description 12
- 239000003507 refrigerant Substances 0.000 claims description 9
- 230000001172 regenerating effect Effects 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 239000001257 hydrogen Substances 0.000 claims description 6
- 229910052739 hydrogen Inorganic materials 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000002887 superconductor Substances 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 238000010521 absorption reaction Methods 0.000 claims description 3
- 150000002431 hydrogen Chemical class 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000002826 coolant Substances 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 20
- 238000000034 method Methods 0.000 description 17
- 230000006835 compression Effects 0.000 description 13
- 238000007906 compression Methods 0.000 description 13
- 230000002792 vascular Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 3
- 230000010358 mechanical oscillation Effects 0.000 description 3
- 230000006641 stabilisation Effects 0.000 description 3
- 238000011105 stabilization Methods 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 239000000110 cooling liquid Substances 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229910052754 neon Inorganic materials 0.000 description 1
- GKAOGPIIYCISHV-UHFFFAOYSA-N neon atom Chemical compound [Ne] GKAOGPIIYCISHV-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a J-T throttle cooling cycle system driven by a low-temperature linear compressor. The J-T throttle cooling cycle system driven by the low-temperature linear compressor comprises a cooling unit and a pre-cooling unit, wherein the cooling unit comprises a first-stage low-temperature linear compressor, a throttle pre-heat-exchanger, a throttle valve and an evaporator, and the pre-cooling unit comprises a first-stage pre-cooling heat exchanger and a pre-cooling mechanism. The outlet of the first-stage low-temperature linear compressor is communicated with a high-temperature side pipeline of the first-stage pre-cooling heat exchanger, a high-temperature side pipeline of the throttle pre-heat-exchanger, the throttle valve, a low-temperature side pipeline of the throttle pre-heat-exchanger and the inlet of the compressor in sequence through pipelines, and thus a circulation loop is formed. The outlet of the pre-cooling mechanism is communicated with a low-temperature pipeline of the throttle pre-heat-exchanger, a surface coil pipe of the first-stage low-temperature linear compressor and the inlet of the pre-cooling mechanism in sequence through pipelines, and thus a circulation loop is formed. According to the J-T throttle cooling cycle system driven by the low-temperature linear compressor, the compressor which is operated in low temperature is adopted, the pressure loss of cooling agents caused by a counter-flow type heat exchanger is reduced, the pressure ratio between two ends of the throttle valve is increased, and the J-T throttle cooling performance is improved.
Description
Technical field
The utility model relates to refrigeration technology field, specifically relates to the J-T throttling refrigeration circulatory system that a kind of low temperature Linearkompressor drives.
Background technology
Development along with the space exploration technology, there is increasing detector to be operated in 4K and mK level warm area, and mK level warm area must provide precooling by the 4K warm area, so the 4K warm area is extremely important warm area in the space exploration, is emphasis and the difficult point of scientific research always.
The refrigeration modes of space liquid helium warm area mainly contains liquid helium (or superfluid helium) Dewar technology and mechanical type Refrigeration Technique.Wherein the utilization of liquid helium Dewar Refrigeration Technique is stored in liquid helium in the high vacuum multiple layer heat insulation storage tank or the evaporation of superfluid helium absorbs heat to realize refrigeration effect, this mode can obtain more stable temperature, space flight field of detecting in early days has widely to be used, technology is ripe relatively, but it exists, and volume is big, Heavy Weight, adiabatic system complexity, is subjected to shortcomings such as working medium memory space restriction in launch cost height and service life.Progress and development along with the mechanical type Refrigeration Technique, The Application of Technology such as flat spring and clearance seal particularly, thoroughly solve the long-life problem that the Dewar technology can't overcome all the time, made mechanical type Refrigeration Technique such as sterlin refrigerator and vascular refrigerator fast-developing and occupy suitable share at space industry over nearly 20 years.And at the following warm area of 15K, helium substantial deviation perfect gas character, regenerative material volumetric specific heat capacity sharply descend the degradation reason to cause the sterlin refrigerator and the stirling-type vascular refrigerators that have used in a large number in the space lower at liquid helium warm area refrigerating efficiency.During using, real space often wishes that compressor unit can as close as possible heat-sink unit be convenient to the dissipation of heat, heat dissipation, mechanical oscillation and the electromagnetic interference of bringing to reduce compressor away from the detector assembly that is cooled as far as possible.And the cold junction of regenerating type low-temperature refrigerator and hot junction distance is closer, is difficult to the requirement that realizes that compressor and cold head split, thereby has limited its application in space tasks.
Joule-Thompson j-t refrigerator (Joule-Thomson Cooler, hereinafter to be referred as the J-T j-t refrigerator) when utilizing temperature to be lower than 15K, the Joule-Thomson throttle effect that remarkable these characteristics of the non-ideal characteristic of helium cause obtains refrigeration, and efficient is higher.And the J-T refrigeration machine do not have the cold junction moving component, and the working medium direct current flows, and cold head can make the J-T refrigeration machine become the main flow of space liquid helium warm area task according to the series of advantages that the structure of required cooling characteristics such as carry out freely designing are brought.
J-T refrigerator compressor unit can be divided into on-mechanical compressor and mechanical compressor two classes.The former mainly adopts the absorption compressor, is one of focus of present J-T refrigeration machine research, have characteristics such as movement-less part, mechanical oscillation and electromagnetic interference are little, but the efficient of adsorbing compressor is generally on the low side, and the structure of compressor assembly is more complicated also; The latter then works at room temperature, although certain mechanical oscillation and the electromagnetic interference of the inevasible existence of compressor unit, the mechanical compress machine technology is ripe relatively, and system architecture is simple, and efficient is than higher.And for long-life of space liquid helium warm area, low vibration does not have the requirement of oil, and having Linearkompressor in the mechanical compressor at present only can satisfy.Therefore Linearkompressor is the main driving type that present J-T refrigeration machine real space is used.There is the not high technical problem of refrigeration performance mostly in the J-T refrigeration machine that exists at present.
The utility model content
The J-T throttling refrigeration circulatory system that the utility model provides a kind of low temperature Linearkompressor to drive, this cooling cycle system adopts the compressor of working under the low temperature, reduced the pressure loss that cold-producing medium produces because of counter-flow heat exchanger, import and export under the identical situation of pressure ratio at compressor, increase choke valve two ends pressure ratio, improved J-T throttling refrigeration performance.
The J-T throttling refrigeration circulatory system that a kind of low temperature Linearkompressor drives comprises refrigeration unit and precooling unit, and described refrigeration unit comprises a grade low-temp Linearkompressor, the preceding heat exchanger of throttling, choke valve and evaporimeter; Described precooling unit comprises one-level precool heat exchanger device and precooling mechanism; According to refrigerant flow direction, the outlet of a described grade low-temp Linearkompressor is communicated with high temperature side pipeline, choke valve and the evaporator inlet of heat exchanger before the high temperature side pipeline of one-level precool heat exchanger device, the throttling successively by pipeline, evaporator outlet by pipeline successively with throttling before low temperature side pipeline and the suction port of compressor of heat exchanger be communicated with the formation closed circuit; Flow to according to precooling agent, the outlet of described precooling mechanism is communicated with the surperficial coil pipe of the low temperature side pipeline of one-level precool heat exchanger device, a grade low-temp Linearkompressor and precooling mechanism entrance successively by pipeline and forms the pre-cold loop that circulates.
If compressor work at low temperatures, its coil resistance can reduce greatly, and the Joule heat that itself produces also can reduce thereupon, and its thermic load of keeping low temperature environment is Joule heat and working medium heat of compression sum, also can reduce greatly.J-T j-t refrigerator for the deep cooling warm area of normal temperature lower compression often needs the multi-level countercurrent heat exchanger to reclaim cold, if compressor is compression at low temperatures directly, then can reduce the counter-flow heat exchanger number, thereby can reduce the pressure drop that a plurality of heat exchangers bring, make the preceding pressure of throttling more near Compressor Discharge Pressure, pressure is more near compressor air suction pressure after the throttling, the temperature drop that throttling causes is bigger, can obtain lower cryogenic temperature or bigger refrigerating capacity (better refrigeration performance).Its working medium can be helium, hydrogen, and neon (rare gas is very expensive, generally need not), nitrogen etc., its compressor low temperature environment of living in is decided on its working medium and cryogenic temperature requirement.
Be further to improve refrigeration performance, as preferably, a described grade low-temp Linearkompressor is the superconduction Linearkompressor.The superconduction Linearkompressor is the Linearkompressor of work employing superconducting coil at low temperatures, the advantage of its existing common Linearkompressor, and show more performance at low temperatures.The Linearkompressor that adopts superconducting motor is being lower than its coil method temperature when following, and its resistance is almost nil, thereby has eliminated the copper loss of superconduction Linearkompressor, thereby has eliminated the Joule heat that corresponding coil produces.Therefore at the superconduction Linearkompressor when it is worked below coil method critical-temperature, the heat of compression that the thermic load that himself produces only produces for compression working medium that is to say that to keep the required refrigerating capacity of low temperature environment less for it.So adopt the liquid helium warm area J-T throttling refrigeration circulation of superconduction Linearkompressor just can obtain liquid helium warm area refrigeration performance more efficiently, have compact conformation, long, reliability advantages of higher of life-span simultaneously.
In the actual use, as preferably, compressor can adopt multi-stage compression, when for example adopting two stages of compression, also is provided with two grade low-temp Linearkompressors and secondary precool heat exchanger device on the pipeline before described one-level precool heat exchanger device high temperature side pipeline outlet and the throttling between the heat exchanger high temperature side pipeline entrance; The high temperature side pipeline connection of described two grade low-temp Linearkompressor entrances and one-level precool heat exchanger device, the outlet of two grade low-temp Linearkompressors is communicated with heat exchanger high temperature side pipeline entrance before the throttling by the high temperature side pipeline of secondary precool heat exchanger device; The low temperature side pipeline entrance of described secondary precool heat exchanger device exports with precooling mechanism simultaneously by pipeline and is communicated with, and outlet is communicated with the surperficial coil pipe entrance of two grade low-temp Linearkompressors; The surperficial coil pipe outlet of two grade low-temp Linearkompressors is communicated with the entrance of precooling mechanism by pipeline simultaneously.When adopting two stages of compression, in the outlet of the first order low temperature Linearkompressor working medium is cooled to first order low temperature Linearkompressor suction temperature, and then enters second level low temperature Linearkompressor, can reduce the caloric value of second level compression, also can reduce total input work, improve cycle efficieny.As further preferred, described two grade low-temp Linearkompressors are the superconduction Linearkompressor.
In refrigeration unit, also can increase Linearkompressor according to actual needs, as preferably, also be provided with Linearkompressor, first-class heat exchanger, high temperature precool heat exchanger device, secondary heat exchanger on the pipeline before the described throttling between the outlet of the low temperature side pipeline of heat exchanger and the grade low-temp Linearkompressor entrance; According to refrigerant flow direction, the outlet of the low temperature side pipeline of heat exchanger is communicated with described Linearkompressor entrance with the low temperature side pipeline of secondary heat exchanger, the low temperature side pipeline of first-class heat exchanger successively by pipeline before the described throttling, and Linearkompressor exports and passes through pipeline and be communicated with a described grade low-temp Linearkompressor entrance with the high temperature side pipeline of high temperature side pipeline, high temperature precool heat exchanger device and the secondary heat exchanger of first-class heat exchanger successively.
Described precooling mechanism can be according to the temperature difference of low temperature Linearkompressor needs work, select the refrigeration mechanism of different cold-producing mediums for use, for example: if compressor need be operated in 20K, so generally use liquid hydrogen as the cryogen of cooling compressor, it also can be helium, corresponding refrigeration mechanism can be selected hydrogen absorption type refrigerating mechanism for use or be the J-T throttling refrigeration mechanism of working medium with hydrogen, it perhaps is regenerative refrigerating mechanism (the GM refrigeration machine of working medium with helium, sterlin refrigerator, the GM vascular refrigerator, the compound refrigeration machine of Stirling vascular refrigerator or Stirling/vascular).If compressor operating is at 80K left and right sides warm area, it is the J-T throttling refrigeration mechanism of working medium that described refrigeration mechanism can adopt with nitrogen, or is the regenerative refrigerating mechanism of working medium with helium.
For obtaining the refrigeration warm area of 4K, as preferably, described cold-producing medium is helium, and described precooling mechanism is for providing the precooling mechanism of the following temperature low-temperature receiver of 20K; The coil of described superconduction Linearkompressor is the superconductor that critical-temperature is higher than 20K; The cold-producing medium of described precool heat exchanger device refrigerant outlet need be chilled to 20K and following temperature in advance.
Compared with prior art, the beneficial effects of the utility model are embodied in:
(1) the J-T throttling refrigeration circulatory system adjustability of low temperature Linearkompressor driving of the present utility model is stronger, can adopt single-stage or multistage superconduction Linearkompressor in the form of coil method critical-temperature with lower compression, also can adopt Linearkompressor one-level compression at normal temperatures, the superconduction Linearkompressor is in the form of coil method critical-temperature with next stage or secondary compression, former structure is compacter, theoretical Energy Efficiency Ratio (Kano COP) height of J-T circulation self, the latter is conducive to realize bigger pressure ratio and reduces the compressor cost, can select according to actual needs.
(2) the utility model adopts in the low temperature environment of the linear compressor operating of superconduction about 20K, and the working medium of liquid helium warm area J-T throttling refrigeration circulation is compressed, and is conducive to increase the actual pressure ratio in throttling front and back, promotes this circularly cooling performance.Because the superconduction Linearkompressor has adopted superconducting coil, eliminate the copper loss that is caused by resistance in the superconduction Linearkompressor linear electric machine simultaneously, improved the efficient of compressor effectively.Therefore the liquid helium warm area J-T throttling refrigeration circulation by the linear driven compressor of superconduction will have higher efficient, also have long, reliability advantages of higher of life-span.
Description of drawings
Fig. 1 is first kind of embodiment schematic diagram of the J-T throttling refrigeration circulatory system of low temperature Linearkompressor driving of the present utility model.
Fig. 2 is second kind of embodiment schematic diagram of the J-T throttling refrigeration circulatory system of low temperature Linearkompressor driving of the present utility model.
Fig. 3 is the third embodiment schematic diagram of the J-T throttling refrigeration circulatory system of low temperature Linearkompressor driving of the present utility model.
Fig. 4 is the T-s schematic diagram of the circulatory system shown in Figure 1.
Fig. 5 is the T-s schematic diagram of the circulatory system shown in Figure 2.
Wherein: 1: one grade low-temp Linearkompressor, 2: one-level precool heat exchanger device, 3: heat exchanger, 4 before the throttling: choke valve, 5: evaporimeter, 6: precooling mechanism, 7: one grade low-temp Linearkompressor surface coil pipes, 8: Linearkompressor, 9: first-class heat exchanger, 10: high temperature precool heat exchanger device, 11: secondary heat exchanger, 12: two grade low-temp Linearkompressors, 13: two grade low-temp Linearkompressor surface coil pipes, 14: secondary precool heat exchanger device.
The specific embodiment
As shown in Figure 1, the J-T throttling refrigeration circulatory system that a kind of low temperature Linearkompressor drives comprises refrigeration unit and precooling unit, and refrigeration unit comprises a grade low-temp Linearkompressor 1, the preceding heat exchanger 3 of throttling, choke valve 4 and evaporimeter 5; The precooling unit comprises one-level precool heat exchanger device 2 and precooling mechanism 6, and wherein a grade low-temp Linearkompressor 1 is the superconduction Linearkompressor.
Annexation between refrigeration unit and each parts of precooling unit is:
According to refrigerant flow direction, the outlet of one grade low-temp Linearkompressor 1 is communicated with high temperature side pipeline, choke valve 4 and evaporimeter 5 entrances of heat exchanger 3 before the high temperature side pipeline of one-level precool heat exchanger device 2, the throttling successively by pipeline, evaporimeter 5 outlets by pipeline successively with throttling before low temperature side pipeline and compressor 1 entrance of heat exchanger 3 be communicated with the formation closed circuit;
Flow to according to precooling agent, 6 outlets of precooling mechanism are communicated with the pre-cold loop of formation circulation with the low temperature side pipeline of one-level precool heat exchanger device 2, surperficial coil pipe 7 and precooling mechanism 6 entrances of a grade low-temp Linearkompressor 1 successively by pipeline.
The course of work of working medium is respectively in refrigeration unit and the precooling unit:
The course of work of refrigeration unit inner refrigerant is: cold-producing medium is compressed to high pressure by a grade low-temp Linearkompressor 1 and discharges, high temperature side pipeline and the choke valve 4 of heat exchanger 3 before the one-level of flowing through precool heat exchanger device 2, the throttling, at choke valve 4 places throttling inflow evaporator 5 to low pressure and after reaching the liquid helium warm area, the low temperature side pipeline of heat exchanger 3 finally returns a grade low-temp Linearkompressor 1 enter throttling behind evaporimeter 5 boil-off gas before.
The course of work of precooling agent is in the precooling unit: precooling agent is set out by precooling mechanism 6, the one-level of flowing through precool heat exchanger device 2 and grade low-temp Linearkompressor surface coil pipe 7 cool off and return precooling mechanism 6 after a grade low-temp Linearkompressor 1 exports working medium and a grade low-temp Linearkompressor 1.
Precooling mechanism 6 need provide the low-temperature receiver of the following temperature of 20K and carry the power set of precooling agent, optional the selecting with helium of precooling mechanism is regenerative refrigerating mechanism (the GM refrigeration machine of working medium, sterlin refrigerator, GM vascular refrigerator, the compound refrigeration machine of Stirling vascular refrigerator or Stirling/vascular).One grade low-temp Linearkompressor, 1 coil adopts critical-temperature to be higher than the superconductor of 20K.System such as above-mentioned flow process and requirement are installed, and after installing, internal system are evacuated to 10
-2About Pa, charge into high-purity helium then, keep again internal system being evacuated to 10 in about 5 minutes
-2About Pa.After vacuumizing inflation 3-4 time so repeatedly, finally charge into high-purity helium of operating pressure, can the assurance system in the purity of helium working medium.Open precooling mechanism 6, make in the precooling mechanism 6 the precooling agent one-level precool heat exchanger device 2 of flowing through that a grade low-temp Linearkompressor 1 outlet working medium is chilled to 20K and following temperature in advance, the grade low-temp Linearkompressor surface coil pipe 7 of flowing through afterwards is cooled to a grade low-temp Linearkompressor 1 below the critical-temperature of coil method of a grade low-temp Linearkompressor 1, finally flows back to precooling mechanism 6.Then, regulate the running frequency of a grade low-temp Linearkompressor 1 to liquid helium warm area J-T throttling refrigeration circulation frequency optimum traffic.Before system stability, regulate precooling mechanism 6 simultaneously guaranteeing the following stable operation of critical-temperature of a grade low-temp Linearkompressor 1 coil method, and one-level precool heat exchanger device 2 sender property outlet temperature stabilizations are in 20K and following temperature.Can obtain liquid helium temperature and corresponding refrigerating capacity at evaporimeter 5 places behind the system stability.Fig. 4 is the T-s schematic diagram of the J-T throttling refrigeration circulatory system that drives of the low temperature Linearkompressor of present embodiment.Respectively numbering curve among Fig. 4 is the conditional curve of working medium in the corresponding numbered block of Fig. 1.
1 difference of a kind of J-T throttling refrigeration circulatory system of low temperature Linearkompressor driving, and embodiment as shown in Figure 2 is: also be provided with two grade low-temp Linearkompressors 12 and secondary precool heat exchanger device 14 on the pipeline before the outlet of one-level precool heat exchanger device 2 high temperature side pipelines and the throttling between the heat exchanger 3 high temperature side pipeline entrances.The high temperature side pipeline connection of two grade low-temp Linearkompressors, 12 entrances and one-level precool heat exchanger device 2 wherein, 12 outlets of two grade low-temp Linearkompressors are communicated with the preceding heat exchanger 3 high temperature side pipeline entrances of throttling by the high temperature side pipeline of secondary precool heat exchanger device 14; The low temperature side pipeline entrance of secondary precool heat exchanger device 14 exports with precooling mechanism 6 simultaneously by pipeline and is communicated with, and the low temperature side pipeline outlet of secondary precool heat exchanger device 14 is communicated with surperficial coil pipe 13 entrances of two grade low-temp Linearkompressors 12; Surperficial coil pipe 13 outlets of two grade low-temp Linearkompressors 12 are communicated with the entrance of precooling mechanism 6 by pipeline simultaneously.
Precooling mechanism 6 need provide the low-temperature receiver of the following temperature of 20K and carry the power set of precooling agent, optional the selecting with helium of precooling mechanism is regenerative refrigerating mechanism (the GM refrigeration machine of working medium, sterlin refrigerator, GM vascular refrigerator, the compound refrigeration machine of Stirling vascular refrigerator or Stirling/vascular).One grade low-temp Linearkompressor, 1 coil adopts critical-temperature to be higher than the superconductor of 20K.System such as above-mentioned flow process and requirement are installed, and after installing, internal system are evacuated to 10
-2About Pa, charge into high-purity helium then, keep again internal system being evacuated to 10 in about 5 minutes
-2About Pa.After vacuumizing inflation 3-4 time so repeatedly, finally charge into high-purity helium of operating pressure, can the assurance system in the purity of helium working medium.Open precooling mechanism 6, make in the precooling mechanism 6 precooling agent flow through respectively one-level precool heat exchanger device 2 and secondary precool heat exchanger device 14, one grade low-temp Linearkompressor 1 and two grade low-temp Linearkompressors, 12 outlet temperatures are cooled to 20K and following temperature, the surperficial coil pipe 7 of the grade low-temp Linearkompressor of flowing through respectively afterwards and the compression of two grade low-temps and surperficial coil pipe 13, and a grade low-temp Linearkompressor 1 and two grade low-temp Linearkompressors 12 are cooled to below the critical-temperature of coil method of a grade low-temp Linearkompressor 1 and two grade low-temp Linearkompressors 12, finally flow back to precooling mechanism 6.Then, regulate the running frequency of a grade low-temp Linearkompressor 1 to liquid helium warm area J-T throttling refrigeration circulation frequency optimum traffic.Before system stability, regulate precooling mechanism 6 simultaneously guaranteeing the following stable operation of critical-temperature of a grade low-temp Linearkompressor 1 coil method, and one-level precool heat exchanger device 2 sender property outlet temperature stabilizations are in 20K and following temperature.Can obtain liquid helium temperature and corresponding refrigerating capacity at evaporimeter 5 places behind the system stability.
As shown in Figure 3, the J-T throttling refrigeration circulatory system that a kind of low temperature Linearkompressor drives, comprise refrigeration unit and precooling unit, refrigeration unit comprises a grade low-temp Linearkompressor 1, the preceding heat exchanger 3 of throttling, choke valve 4, evaporimeter 5, Linearkompressor 8, first-class heat exchanger 9, high temperature precool heat exchanger device 10 and secondary heat exchanger 11; The precooling unit comprises one-level precool heat exchanger device 2 and precooling mechanism 6, and wherein a grade low-temp Linearkompressor 1 is the superconduction Linearkompressor.
The course of work of working medium is respectively in refrigeration unit and the precooling unit:
The course of work of refrigeration unit inner refrigerant is: cold-producing medium is compressed to high pressure by Linearkompressor 8 and discharges, the first-class heat exchanger 9 of flowing through, enter one-level low temperature Linearkompressor 1 behind high temperature precool heat exchanger device 10 and the secondary heat exchanger 11, be compressed into more high pressure and discharge again, the one-level of flowing through precool heat exchanger device 2, heat exchanger 3 high temperature side pipelines and choke valve 4 before the throttling, at choke valve 4 places throttling inflow evaporator 5 to low pressure and after reaching liquid helium temperature, the heat exchanger 3 low temperature side pipelines before the throttling of behind evaporimeter 5 boil-off gas, flowing through, the low temperature side pipeline of secondary heat exchanger 11 and the low temperature side pipeline of first-class heat exchanger 9 finally return Linearkompressor 8.Simultaneously, introduce cold in the high temperature precool heat exchanger device 10 and directly cool off first-class heat exchanger 9 high temperature side pipelines outlet working medium.And precooling agent is set out by precooling mechanism 6, and the one-level of flowing through precool heat exchanger device 2 and grade low-temp Linearkompressor surface coil pipe 7 cool off and return precooling mechanism 6 after a grade low-temp Linearkompressor 1 exports working medium and a grade low-temp Linearkompressor 1.Precooling mechanism 6 need provide the low-temperature receiver of the following temperature of 20K and carry the power set of precooling agent.
One grade low-temp Linearkompressor, 1 coil adopts critical-temperature to be higher than the superconductor of 20K.System such as above-mentioned flow process and requirement are installed, and after installing, internal system are evacuated to 10
-2About Pa, charge into high-purity helium then, keep again internal system being evacuated to 10 in about 5 minutes
-2About Pa.After vacuumizing inflation 3-4 time so repeatedly, finally charge into high-purity helium of operating pressure, can the assurance system in the purity of helium working medium.In high temperature precool heat exchanger device 10, introduce working medium in the cold cooling liquid helium J-T circulating with choke, open precooling mechanism 6, the precooling agent grade low-temp Linearkompressor surface coil pipe 7 of flowing through is cooled to a grade low-temp Linearkompressor 1 below the critical-temperature of a grade low-temp Linearkompressor 1 coil method.Then, the running frequency of difference linear adjustment compressor 8, one grade low-temp Linearkompressors 1 is to liquid helium warm area J-T throttling refrigeration circulation frequency optimum traffic.Before system stability, regulate cold that high temperature precool heat exchanger device 10 introduces and precooling mechanism 6 respectively guaranteeing a grade low-temp Linearkompressor 1 in the following stable operation of the critical-temperature of coil method, and one-level precool heat exchanger device 2 sender property outlet temperature stabilizations are in 20K and following temperature.Can obtain liquid helium temperature and corresponding refrigerating capacity at evaporimeter 9 places behind the system stability.
Fig. 5 is the T-S schematic diagram of the J-T throttling refrigeration circulatory system that drives of the low temperature Linearkompressor of embodiment.Respectively numbering curve among Fig. 5 is the conditional curve of working medium in the corresponding numbered block of Fig. 3.
Claims (7)
1. the J-T throttling refrigeration circulatory system that drives of a low temperature Linearkompressor, comprise refrigeration unit and precooling unit, it is characterized in that described refrigeration unit comprises a grade low-temp Linearkompressor (1), the preceding heat exchanger (3) of throttling, choke valve (4) and evaporimeter (5); Described precooling unit comprises one-level precool heat exchanger device (2) and precooling mechanism (6); According to refrigerant flow direction, the outlet of a described grade low-temp Linearkompressor (1) is communicated with high temperature side pipeline, choke valve (4) and evaporimeter (5) entrance of heat exchanger (3) before the high temperature side pipeline of one-level precool heat exchanger device (2), the throttling successively by pipeline, evaporimeter (5) outlet pass through pipeline successively with throttling before low temperature side pipeline and compressor (1) entrance of heat exchanger (3) be communicated with the formation closed circuit; Flow to according to precooling agent, described precooling mechanism (6) outlet is communicated with the pre-cold loop of formation circulation with the low temperature side pipeline of one-level precool heat exchanger device (2), surperficial coil pipe (7) and precooling mechanism (6) entrance of a grade low-temp Linearkompressor (1) successively by pipeline.
2. the J-T throttling refrigeration circulatory system of low temperature Linearkompressor driving according to claim 1 is characterized in that a described grade low-temp Linearkompressor (1) is the superconduction Linearkompressor.
3. the J-T throttling refrigeration circulatory system that drives of low temperature Linearkompressor according to claim 1, it is characterized in that, also be provided with two grade low-temp Linearkompressors (12) and secondary precool heat exchanger device (14) on the pipeline before the outlet of described one-level precool heat exchanger device (2) high temperature side pipeline and the throttling between heat exchanger (3) the high temperature side pipeline entrance; The high temperature side pipeline connection of described two grade low-temp Linearkompressor (12) entrances and one-level precool heat exchanger device (2), the outlet of two grade low-temp Linearkompressors (12) is communicated with heat exchanger (3) high temperature side pipeline entrance before the throttling by the high temperature side pipeline of secondary precool heat exchanger device (14); The low temperature side pipeline entrance of described secondary precool heat exchanger device (14) exports with precooling mechanism (6) simultaneously by pipeline and is communicated with, and outlet is communicated with surperficial coil pipe (13) entrance of two grade low-temp Linearkompressors (12); Surperficial coil pipe (13) outlet of two grade low-temp Linearkompressors (12) is communicated with the entrance of precooling mechanism (6) by pipeline simultaneously.
4. the J-T throttling refrigeration circulatory system of low temperature Linearkompressor driving according to claim 3 is characterized in that described two grade low-temp Linearkompressors (12) are the superconduction Linearkompressor.
5. the J-T throttling refrigeration circulatory system that drives of low temperature Linearkompressor according to claim 1, it is characterized in that, also be provided with Linearkompressor (8), first-class heat exchanger (9), high temperature precool heat exchanger device (10), secondary heat exchanger (11) on the pipeline before the described throttling between the outlet of the low temperature side pipeline of heat exchanger (3) and grade low-temp Linearkompressor (1) entrance; According to refrigerant flow direction, the outlet of the low temperature side pipeline of heat exchanger (3) is communicated with described Linearkompressor (8) entrance with the low temperature side pipeline of secondary heat exchanger (11), the low temperature side pipeline of first-class heat exchanger (9) successively by pipeline before the described throttling, and Linearkompressor (8) exports and passes through pipeline and be communicated with described grade low-temp Linearkompressor (a 1) entrance with the high temperature side pipeline of high temperature side pipeline, high temperature precool heat exchanger device (10) and the secondary heat exchanger (11) of first-class heat exchanger (9) successively.
6. the J-T throttling refrigeration circulatory system that drives according to the described low temperature Linearkompressor of the arbitrary claim of claim 1-5, it is characterized in that, described precooling mechanism (6) is hydrogen absorption type refrigerating mechanism, be the J-T throttling refrigeration mechanism of working medium with hydrogen, be the J-T throttling refrigeration mechanism of working medium with nitrogen or be the regenerative refrigerating mechanism of working medium with helium.
7. the J-T throttling refrigeration circulatory system that drives according to the described low temperature Linearkompressor of claim 2 is characterized in that described cold-producing medium is helium, and described precooling mechanism (6) is for providing the precooling mechanism of the following temperature low-temperature receiver of 20K; The coil of described superconduction Linearkompressor is the superconductor that critical-temperature is higher than 20K; The cold-producing medium of described precool heat exchanger device (2) refrigerant outlet need be chilled to 20K and following temperature in advance.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320033469.6U CN203132192U (en) | 2013-01-21 | 2013-01-21 | J-T throttle cooling cycle system driven by low-temperature linear compressor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320033469.6U CN203132192U (en) | 2013-01-21 | 2013-01-21 | J-T throttle cooling cycle system driven by low-temperature linear compressor |
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| CN203132192U true CN203132192U (en) | 2013-08-14 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047788A (en) * | 2013-01-21 | 2013-04-17 | 浙江大学 | J-T throttling refrigeration circulating system driven by low-temperature linear compressor |
| CN107560226A (en) * | 2017-09-26 | 2018-01-09 | 浙江大学 | The pre- cold mould of liquid hydrogen warm area directly throttles JT refrigeration machines |
| CN110486976A (en) * | 2019-08-29 | 2019-11-22 | 上海理工大学 | Two-stage lamination microchannel throttling refrigerator |
-
2013
- 2013-01-21 CN CN201320033469.6U patent/CN203132192U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047788A (en) * | 2013-01-21 | 2013-04-17 | 浙江大学 | J-T throttling refrigeration circulating system driven by low-temperature linear compressor |
| CN103047788B (en) * | 2013-01-21 | 2015-04-29 | 浙江大学 | J-T throttling refrigeration circulating system driven by low-temperature linear compressor |
| CN107560226A (en) * | 2017-09-26 | 2018-01-09 | 浙江大学 | The pre- cold mould of liquid hydrogen warm area directly throttles JT refrigeration machines |
| CN107560226B (en) * | 2017-09-26 | 2020-09-25 | 浙江大学 | Precooling type direct throttling JT refrigerating machine in liquid hydrogen temperature zone |
| CN110486976A (en) * | 2019-08-29 | 2019-11-22 | 上海理工大学 | Two-stage lamination microchannel throttling refrigerator |
| CN110486976B (en) * | 2019-08-29 | 2021-08-24 | 上海理工大学 | Two-stage laminated microchannel throttling refrigerator |
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