CN103615823B - A kind of can the Stirling-throttling composite refrigerator of fast-refrigerating - Google Patents
A kind of can the Stirling-throttling composite refrigerator of fast-refrigerating Download PDFInfo
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- CN103615823B CN103615823B CN201310660186.9A CN201310660186A CN103615823B CN 103615823 B CN103615823 B CN 103615823B CN 201310660186 A CN201310660186 A CN 201310660186A CN 103615823 B CN103615823 B CN 103615823B
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Abstract
The invention discloses a kind of can the Stirling-throttling composite refrigerator of fast-refrigerating, comprise stirling refrigeration unit and throttling refrigeration unit two parts, stirling refrigeration unit adopts direct coupling system integrated (DDCA) with encapsulation Dewar, the bushing type counterflow heat exchanger of throttling refrigeration unit is arranged in the empty volume between the stem stem of throttling refrigeration unit and Dewar shell, and stirling refrigeration unit and throttling refrigeration unit control start and stop by the automatically controlled unified of stirling refrigeration unit.Throttling refrigeration unit of the present invention efficiently utilizes the inner empty volume of Dewar, the appearance structure of whole compound-refrigerating mechanism cold part is identical with traditional integrated form stirling refrigeration assembly with volume, be particularly suitable for being applied in some to temperature fall time and reliably and with long-term sex work all have the cooling occasion of the infrared device of strict demand, under the prerequisite not changing interface size, directly replace existing integrated form stirling refrigeration assembly, realize infrared device cooling rate and sex work reliably and with long-term faster.
Description
Technical field
The present invention relates to a kind of composite refrigerator, specifically relate to a kind of can the Stirling-throttling composite refrigerator of fast-refrigerating.
Background technology
In modern science and technology, the operation and development of many instrument and equipments be unable to do without low-temperature refrigeration technology, and such as infrared device, cryotronics device, cryogenic condensation vacuum plant, superconducting magnet and superconducting magnetic resonance imaging machine etc. all need satisfactory Cryo Refrigerator to provide cooling condition.
Regenerative refrigerating technology and dividing wall type Refrigeration Technique are two important branch in field of low-temperature refrigeration, according to these two kinds of technology feature separately, all comparatively extensive in field application such as low-temperature physics, national defense and military, the energy, medical treatment at present.
Sterlin refrigerator and j-t refrigerator are the representative cryogenic refrigeration machine in back-heating type and dividing wall type two kinds of Refrigeration Techniques respectively.Wherein, sterlin refrigerator utilizes motor-driven compressor structure and expansion mechanism, the heat exchange between regeneration filler and working medium is utilized to complete refrigeration effect, there is compact conformation, efficiency is high, the advantages such as volume is little, develop through long-term competition, assessment and substantial research, sterlin refrigerator is shown one's talent from the mini refrigerating machine of all candidates, be widely used in night vision device, the cooler etc. of missile brain, but sterlin refrigerator is subject to driven unit, the restriction of the design features such as transmission mechanism, initial pre-coo time is longer, it is made to require to obtain in the application of enough colds to be rapidly restricted, j-t refrigerator utilizes Joule-Thomson effect, gases at high pressure are utilized to expand into low pressure to produce refrigeration effect by throttling arrangement, throttling refrigerator has open type and enclosed two kinds of forms usually, the throttling refrigerator of open circulation pattern adopts high-pressure reservoir or pressure gas cylinder air feed, this system does not need the permanent connection between compressor and refrigerator, the separation distance of compressor and cryostat is not limited, system supplies except gases at high pressure except requiring continuously, power is not needed to input, open type throttling device can be assembled into a complete system with little gas cylinder, there is structure simple, start-up time is short, refrigerating speed is fast, the features such as quality is little, but this mini-system only can maintain the cryogenic effect of short period.Enclosed throttling refrigerator needs the circulatory system closed by restricting element, heat exchanger and source of the gas Preparation equipment composition, compressor and refrigerator is permanent links together, this system can Long-Time Service, but system architecture is complicated, bulky, its application is subject to great restriction.
In some application, both there is harsh requirement to pre-coo time, had strict restriction, such as infrared guidance system to the volume of detector and quality again.In infrared guidance system, the dimensions of system directly has influence on the optical property of guidance system position marker, the quality size of refrigerator also can affect the kinetic characteristic of position marker, if likely, designer can some parts of refrigerator, as valve, pressure sensor, gas cylinder or liquid reservoir etc. are placed on the position away from position marker as far as possible, sometimes be not simply contained on bullet, but be contained on launcher, after MISSILE LAUNCHING, Infrared Detectors is only by cold-storage work, but in some specific occasion, cold storage capacity is not sufficient to meet instructions for use.Therefore can fast precooling, the demand that the Miniature refrigerating device of cold becomes inevitable can be provided again continually and steadily.
The domestic research to sterlin refrigerator and j-t refrigerator is more at present, but the research combined with j-t refrigerator by sterlin refrigerator is also comparatively rare.Utilize the feature that sterlin refrigerator can work reliably and with long-term, in conjunction with the advantage of open type throttling refrigeration device fast-refrigerating, the two is combined into the Stirling-throttling composite refrigeration system of complete set, both required cryogenic temperature can be reached rapidly, work that again can be steady in a long-term, and can repeat, repeatedly use, such refrigerating plant will have a wide range of applications field.
Summary of the invention
The object of the invention is to overcome sterlin refrigerator start comparatively slow, pre-coo time is long and open type throttling refrigeration device can not the technical disadvantages of long-term stable operation, provide a kind ofly steady in a long-term can provide the Stirling-throttling composite refrigerator of cold by fast-refrigerating simultaneously.
Technical scheme of the present invention is: a kind of can the Stirling-throttling composite refrigerator of fast cooling, comprise stirling refrigeration unit and throttling refrigeration unit two parts, stirling refrigeration unit adopts DDCA mode integrated with encapsulation Dewar 1, the bushing type counterflow heat exchanger 6 of throttling refrigeration unit is arranged in the empty volume between throttling refrigeration unit stem stem 17 and Dewar 1 shell, and stirling refrigeration unit and throttling refrigeration unit are unified to control start and stop by automatically controlled 12 of stirling refrigeration unit.
The present invention's stirling refrigeration unit used is classical Monobloc Stirling Cryocooler, comprise and drive automatically controlled 12, DC brushless motor, toggle, compression assembly and expansion assembly, it itself is an independently complete body, refrigeration working medium is high-purity helium, helium purity is better than more than 99.999%, and the blowing pressure is at 3.2-3.5MPa.Before the assembling carrying out composite refrigerator, first carry out performance test, after performance touches the mark, carry out the assembling with throttling refrigeration unit again.
Circular cold head boss 19 is processed in the middle of cold head 5 top of stirling refrigeration unit of the present invention, the upper surface of cold head boss 19 and the bottom face close contact of cold cap 2, to reduce the heat transfer resistance between cold head boss 19 and cold cap 2, the annular end face of cold cap 2 and the upper surface tight fit of cold head cold dish 20, edge is integrally welded by Laser Welding, weld will ensure that, under the absolute the blowing pressure of throttling refrigeration unit 40MPa, the slip of refrigeration working medium is 10
-9-10
-10pa.m
3/ s.The diameter of cold head boss 19 is less than the external diameter of cold head cold dish 20, to realize cold cap 2 to weld rear formation throttling refrigeration unit annular fluid collection chamber 3 with cold head cold dish 20.
The bushing type counterflow heat exchanger 6 that throttling refrigeration unit of the present invention shows closely is coiled in on the outer wall of the stainless steel thin-wall cylinder of both ends open for throttling refrigeration unit stem stem 17 from the bottom to top, throttling refrigeration unit stem stem 17 bottom is welded on the upper surface of cold finger pedestal 10, the outer tube of bushing type counterflow heat exchanger 6 and the upper and lower side of throttling refrigeration unit stem stem 17 outer wall are welded and fixed, the upper and lower side of bushing type counterflow heat exchanger 6 draws corresponding length respectively, upper end is used for being connected with annular fluid collection chamber 3, lower end is used for being connected with pipe joint 13, the outer tube avoiding damaging bushing type counterflow heat exchanger 6 is noted during welding, in order to avoid cause the leakage of high pressure throttling refrigeration working medium.Throttling refrigeration unit stem stem 17 height should lower than the height of cold finger 7, be communicated with to keep outboard chambers in throttling refrigeration unit stem stem 17, thus make Dewar 1 adopt an exhaust outlet to discharge the inner gas had living space, and due to contactless between the upper end of throttling refrigeration unit stem stem 17 and cold head 5, when effectively can reduce stirling refrigeration cell operation, leak heat by the axis of throttling refrigeration unit stem stem 17.
5mm in the shell that the cold junction extension (namely upper end) of bushing type counterflow heat exchanger 6 of the present invention inserts annular fluid collection chamber 3, in junction seal welding, hot junction extension (namely lower end) is through the bottom of Dewar adpting flange 11, and weld with one end of pipe joint 13, outer tube and Dewar adpting flange 11 seal welding of bushing type counterflow heat exchanger 6 is being realized through the welding of Dewar adpting flange 11 place, weld all will ensure that, under the absolute the blowing pressure of throttling refrigeration unit 40MPa, the slip of refrigeration working medium is 10
-9-10
-10pa.m
3/ s, and demand fulfillment Dewar 1 vacuum leak hunting is simultaneously better than 10
-12pa.m
3/ s.The left end seal welding of pipeline and pipe joint 13 outside the lower end that bushing type counterflow heat exchanger 6 stretches out Dewar adpting flange 11, one-way pressure valve 16 is installed in the outer tube exit 21 of pipe joint 13, inner tube outlet place 22, right side is provided with magnetic valve 14, the right-hand member of magnetic valve 14 is connected with snap joint 15 by pressure duct, snap joint 15 is connected with gas cylinder 18 by pressure duct again, gas cylinder 18 is built with refrigeration working medium, all connecting portions need strict leak detection, and each junction ensures that high-pressure refrigeration working medium is not leaked.The gas cylinder 18 of throttling refrigeration unit is arranged on periphery, and can change or cutoff high gas cylinder 18 according to composite refrigerator application scenario, applying working condition and service time, gas cylinder 18 also can according to concrete engineering applicable cases flexible arrangement.
Throttling refrigeration unit of the present invention sends start signal by automatically controlled 12, rear electromagnetic valve 14 open, high-pressure refrigeration working medium is flowed out by gas cylinder 18, snap joint 15 is flowed through through pressure duct, flow through magnetic valve 14 again, the internal helicoid capillary 4 of bushing type counterflow heat exchanger 6 is flowed out by pipe joint 13, annular fluid collection chamber 3 is entered after spiral capillary 4 throttling expansion, the heat exchange with cold cap 2 is realized in annular fluid collection chamber 3, Working medium gas after heat exchange is returned by the outer tube of bushing type counterflow heat exchanger 6, gases at high pressure in precooling spiral capillary 4, finally be discharged to air by the one-way pressure valve 16 in pipe joint 13.When throttling refrigeration unit is closed, when the outer tube force value of bushing type counterflow heat exchanger 6 is lower than external pressure, one-way pressure valve 16 will be closed voluntarily, and cut-out is communicated with air.Before coupling, throttling refrigeration unit and stirling refrigeration unit separate on 26S Proteasome Structure and Function, adopt high pure nitrogen as refrigeration working medium, operating pressure 12-40MPa, purity is better than 99.999%, and impurity content is less than 5ppm, dew-point temperature is better than-65 DEG C, and solid impurity size is less than 5 μm.
Two refrigeration units of the present invention can start simultaneously, and also can start separately, throttling refrigeration unit can realize the fast cooling of cold head 5, and stirling refrigeration unit can maintain the prolonged cold environment of cold head 5.Stirling refrigeration unit and throttling refrigeration unit separate on function and structure, adopt different working medium to freeze, middle to be communicated with without gas circuit, can debug respectively, test its function normally after carry out last assembling again.
Advantage of the present invention is:
The present invention takes full advantage of Monobloc Stirling Cryocooler compact conformation, efficiency is high, volume feature that is little and sex work reliably and with long-term, and it is little to coordinate open type throttling refrigeration body to amass, the advantage of fast-refrigerating, learn from other's strong points to offset one's weaknesses, formed a kind of can the compound refrigeration system of Stirling-throttling of fast-refrigerating, both sterlin refrigerator had been solved by decompressor thermal mass, the restriction of the design feature such as driven unit and transmission mechanism, the shortcoming that initial pre-coo time is longer, system is promptly lowered the temperature according to actual requirement, obtain cold rapidly, solve again open type throttling refrigeration device and be subject to the limited restriction of high-pressure air source air feed, achieve a kind of not only can fast-refrigerating simultaneously but also the composite refrigerator of cold can steady in a long-term be provided.
Stirling refrigeration unit of the present invention and throttling refrigeration unit have respective independence on 26S Proteasome Structure and Function, can carry out respectively assembling, testing, carry out last assembling again, and larger impact can not be caused on performance each other in assembling process, there is stronger engineering operability.The heat exchanger of throttling refrigeration unit of the present invention and throttle part efficiently utilize the empty volume between throttling refrigeration unit stem stem 17 and Dewar 1 shell, the profile of whole compound-refrigerating machine is identical with traditional monoblock type stirling refrigeration assembly with volume (not containing gas piping and the gas cylinder of throttling refrigeration unit), therefore this composite refrigerator directly can be used in the application of traditional stirling refrigeration assembly, directly substitute existing stirling refrigeration assembly when not changing interface size.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is stirling refrigeration cellular construction schematic diagram;
Fig. 3 is that throttling refrigeration unit is coupled with stirling refrigeration unit style cold spots schematic diagram;
Fig. 4 is throttling refrigeration cellular construction schematic diagram;
Fig. 5 is pipe joint structure schematic diagram;
In figure, Dewar 1, cold cap 2, annular fluid collection chamber 3, spiral capillary 4, cold head 5, bushing type counterflow heat exchanger 6, cold finger 7, regenerator shell 8, filler 9, cold finger pedestal 10, Dewar adpting flange 11, automatically controlled 12, pipe joint 13, magnetic valve 14, snap joint 15, one-way pressure valve 16, throttling refrigeration unit stem stem 17, gas cylinder 18, cold head boss 19, cold head cold dish 20, outer tube exit 21, inner tube outlet place 22.
Detailed description of the invention
Below in conjunction with drawings and Examples, the specific embodiment of the present invention is described in further detail:
As shown in Figure 1, the present invention includes stirling refrigeration unit and throttling refrigeration unit two parts, stirling refrigeration unit adopts the mode direct-coupling of IDDCA with encapsulation Dewar 1, the bushing type counterflow heat exchanger 6 of throttling refrigeration unit is arranged in the empty volume between throttling refrigeration unit stem stem 17 and Dewar shell, and stirling refrigeration unit and throttling refrigeration unit are unified to control start and stop by automatically controlled 12 of stirling refrigeration unit.
As shown in Figure 2, stirling refrigeration unit of the present invention is classical Monobloc Stirling Cryocooler, comprise and drive automatically controlled 12, DC brushless motor, toggle, compression assembly and expansion assembly, it itself is an independently complete body, refrigeration working medium is high-purity helium, helium purity is better than more than 99.999%, and the blowing pressure is at 3.2-3.5MPa.Before the assembling carrying out composite refrigerator, first carry out performance test, after performance touches the mark, carry out the assembling with throttling refrigeration unit again.
As shown in Figure 2, circular cold head boss 19 is processed in the middle of stirling refrigeration unit cold head 5 top of the present invention, the upper surface of cold head boss 19 and the bottom face close contact of cold cap 2, to reduce the heat transfer resistance between cold head boss 19 and cold cap 2, the annular end face of cold cap 2 and the upper surface tight fit of cold head cold dish 20, edge is integrally welded by Laser Welding, and weld will ensure that, under the absolute the blowing pressure of throttling refrigeration unit 40MPa, the slip of working medium is 10
-9-10
-10pa.m
3/ s.The diameter of cold head boss 19 is less than the external diameter of cold head cold dish 20, to realize cold cap 2 to weld rear formation throttling refrigeration unit annular fluid collection chamber 3 with cold head cold dish 20.The height of cold head boss 19 and diameter need consider the efficient transmission of the cold of stirling refrigeration unit (as Fig. 2) expansion chamber to cold cap 2 upper surface; The size of the annular fluid collection chamber 3 of throttling refrigeration unit (as Fig. 3) need according to the heat exchange area of throttling working medium, is provided by calculation of thermodynamics optimization according to the thermal mass of the cooled article of cold cap 2 upper surface attachment and required temperature fall time.
As shown in Figure 4, the bushing type counterflow heat exchanger 6 of throttling refrigeration unit of the present invention is closely coiled in on the outer wall of the stainless steel thin-wall cylinder of both ends open for throttling refrigeration unit stem stem 17 from the bottom to top, throttling refrigeration unit stem stem 17 bottom is fixed by the upper surface of Laser Welding and cold finger pedestal 10, the outer tube of bushing type counterflow heat exchanger 6 and the upper and lower side of throttling refrigeration unit stem stem 17 outer wall are welded and fixed by silver soldering, and the upper and lower side of bushing type counterflow heat exchanger 6 draws corresponding length respectively, upper end is used for being connected with annular fluid collection chamber 3, lower end is used for being connected with pipe joint 13, the outer tube avoiding damaging bushing type counterflow heat exchanger 6 is noted during welding, in order to avoid cause the leakage of high pressure throttling refrigeration working medium.Throttling refrigeration unit stem stem 17 height should lower than the height of cold finger 7, be communicated with to keep outboard chambers in throttling refrigeration unit stem stem 17, thus make Dewar 1 adopt an exhaust outlet to discharge the inner gas had living space, and due to contactless between the upper end of throttling refrigeration unit stem stem 17 and cold head 5, when effectively can reduce stirling refrigeration cell operation, leak heat by the axis of throttling refrigeration unit stem stem 17.When the height of throttling refrigeration unit stem stem 17 and diameter need to consider the coiling size of throttling refrigeration unit bushing type counterflow heat exchanger, stirling refrigeration cell operation and throttling refrigeration unit are closed, between cold finger 7 and throttling refrigeration unit stem stem 17, radiation heat transfer lose, is provided by thermodynamic optimization design.
As shown in Figure 1, 5mm in the shell that the cold junction extension (namely upper end) of bushing type counterflow heat exchanger 6 of the present invention inserts annular fluid collection chamber 3, in junction by Laser Welding or silver soldering seal welding, hot junction extension (namely lower end) is through the bottom of Dewar adpting flange 11, and weld with one end of pipe joint 13, realized lower end outer tube and Dewar adpting flange 11 seal welding of bushing type counterflow heat exchanger 6 by Laser Welding through Dewar adpting flange 11 place, each weld all will ensure under the absolute the blowing pressure of throttling refrigeration unit 40MPa, the slip of refrigeration working medium is 10
-9-10
-10pa.m
3/ s, and demand fulfillment Dewar 1 vacuum leak hunting is simultaneously better than 10
-12pa.m
3/ s.
As shown in Figure 4, bushing type counterflow heat exchanger 6 of the present invention stretches out the lower end outer tube of Dewar adpting flange 11 and the left end seal welding of pipe joint 13 as shown in Figure 5, one-way pressure valve 16 is installed in the outer tube exit 21 of pipe joint 13, inner tube outlet place 22, right side is provided with magnetic valve 14, the right-hand member of magnetic valve 14 is connected with snap joint 15 by pressure duct, snap joint 15 is connected with gas cylinder 18 by pressure duct again, gas cylinder 18 is built with refrigeration working medium, all connecting portions need strict leak detection, and each junction ensures that high-pressure refrigeration working medium is not leaked.It is peripheral that gas cylinder 18 is arranged on refrigeration machine assembly, and can change or cutoff high gas cylinder 18 according to composite refrigerator application scenario, applying working condition and service time, gas cylinder 18 also can according to concrete engineering applicable cases flexible arrangement.
As shown in Figure 4, throttling refrigeration unit of the present invention sends start signal by automatically controlled 12, rear electromagnetic valve 14 open, high-pressure refrigeration working medium is flowed out by gas cylinder 18, snap joint 15 is flowed through through pressure duct, flow through magnetic valve 14 again, the internal helicoid capillary 4 of bushing type counterflow heat exchanger 6 is flowed out by pipe joint 13, annular fluid collection chamber 3 is entered after spiral capillary 4 throttling expansion, the heat exchange with cold cap 2 is realized in annular fluid collection chamber 3, Working medium gas after heat exchange is returned by the outer tube of bushing type counterflow heat exchanger 6, gases at high pressure in precooling spiral capillary 4, finally be discharged to air by the one-way pressure valve 16 in pipe joint 13.When throttling refrigeration unit is closed, when the outer tube force value of bushing type counterflow heat exchanger 6 is lower than external pressure, one-way pressure valve 16 will be closed voluntarily, and cut-out is communicated with air.
As shown in Figure 4, before coupling, throttling refrigeration unit and stirling refrigeration unit separate on 26S Proteasome Structure and Function, adopt high pure nitrogen as refrigeration working medium, operating pressure 12-40MPa, purity is better than 99.999%, and impurity content is less than 5ppm, dew-point temperature is better than-65 DEG C, and solid impurity size is less than 5 μm.Before carrying out the assembling of compound-refrigerating machine, throttling refrigeration unit carries out last assembling after can carrying out separately the performance property surveyed again.
Claims (7)
1. one kind can the Stirling-throttling composite refrigerator of fast-refrigerating, comprise stirling refrigeration unit and throttling refrigeration unit two parts, it is characterized in that: stirling refrigeration unit adopts direct coupling system integrated (DDCA) with encapsulation Dewar (1), the bushing type counterflow heat exchanger (6) of throttling refrigeration unit is arranged in the empty volume between the stem stem (17) of throttling refrigeration unit and Dewar (1) shell, and stirling refrigeration unit and throttling refrigeration unit are unified to control start and stop by automatically controlled (12) of stirling refrigeration unit;
Described stirling refrigeration unit is classical Monobloc Stirling Cryocooler, comprise automatically controlled (12), DC brushless motor, toggle, compression assembly and expansion assembly, refrigeration working medium is high-purity helium, and helium purity is more than 99.999%, and the blowing pressure is at 3.2-3.5MPa.
2. according to claim 1 can the Stirling-throttling composite refrigerator of fast-refrigerating, it is characterized in that: in the middle of cold head (5) top of described stirling refrigeration unit, process circular cold head boss (19), the upper surface of cold head boss (19) and the bottom face close contact of cold cap (2), the annular end face of cold cap (2) and the upper surface of cold head cold dish (20) closely cooperate, edge is integrally welded by Laser Welding, weld will ensure that, under the absolute the blowing pressure of throttling refrigeration unit 40MPa, the slip of helium is 10
-9-10
-10pa.m
3/ s; The diameter of cold head boss (19) is less than the external diameter of cold head cold dish (20), to realize the annular fluid collection chamber (3) forming throttling refrigeration unit after cold cap (2) welds with cold head cold dish (20).
3. according to claim 1 can the Stirling-throttling composite refrigerator of fast-refrigerating, it is characterized in that: the bushing type counterflow heat exchanger (6) of described throttling refrigeration unit is closely coiled in on the outer wall of the stainless steel thin-wall cylinder of both ends open for throttling refrigeration unit stem stem (17) from the bottom to top, throttling refrigeration unit stem stem (17) bottom is welded on the upper surface of cold finger pedestal (10), the outer tube of bushing type counterflow heat exchanger (6) and the upper and lower side of throttling refrigeration unit stem stem (17) outer wall are welded and fixed, and the upper and lower side of bushing type counterflow heat exchanger (6) draws corresponding length respectively, upper end is used for being connected with annular fluid collection chamber (3), lower end is used for being connected with pipe joint (13), throttling refrigeration unit stem stem (17) height should lower than the height of cold finger (7).
4. according to claim 3 can the Stirling-throttling composite refrigerator of fast-refrigerating, it is characterized in that: 5mm in the shell that annular fluid collection chamber (3) are inserted in the cold junction extension of the bushing type counterflow heat exchanger (6) of described throttling refrigeration unit i.e. upper end, in junction seal welding, the bottom of Dewar adpting flange (11) is passed in hot junction extension i.e. lower end, and weld with one end of pipe joint (13), lower end outer tube and Dewar adpting flange (11) seal welding of bushing type counterflow heat exchanger (6) is being realized through the welding of Dewar adpting flange (11) place, weld all will ensure under the absolute the blowing pressure of throttling refrigeration unit 40MPa, the slip of working medium is 10
-9-10
-10pa.m
3/ s, and demand fulfillment Dewar (1) vacuum leak hunting is greater than 10 simultaneously
-12pa.m
3/ s.
5. according to claim 3 can the Stirling-throttling composite refrigerator of fast-refrigerating, it is characterized in that: described bushing type counterflow heat exchanger (6) stretches out the lower end outer tube of Dewar adpting flange (11) and the left end seal welding of pipe joint (13), one-way pressure valve (16) is installed in the outer tube exit (21) of pipe joint (13), the inner tube outlet place, right side (22) of pipe joint (13) is provided with magnetic valve (14), the right-hand member of magnetic valve (14) is connected with snap joint (15) by pressure duct, snap joint (15) is connected with gas cylinder (18) by pressure duct again, gas cylinder (18) is built with refrigeration working medium, each junction ensures that high-pressure refrigeration working medium is not leaked.
6. according to claim 3 can the Stirling-throttling composite refrigerator of fast-refrigerating, it is characterized in that: described throttling refrigeration unit sends start signal by automatically controlled (12), rear electromagnetic valve (14) open, high-pressure refrigeration working medium is flowed out by gas cylinder (18), snap joint (15) is flowed through through pressure duct, flow through magnetic valve (14) again, the internal helicoid capillary (4) of bushing type counterflow heat exchanger (6) is flowed into by pipe joint (13), annular fluid collection chamber (3) is entered after spiral capillary (4) throttling expansion, the heat exchange with cold cap (2) is realized in annular fluid collection chamber (3), Working medium gas after heat exchange is returned by the outer tube of bushing type counterflow heat exchanger (6), gases at high pressure in precooling spiral capillary (4), finally be discharged to air by the one-way pressure valve (16) in pipe joint (13), when throttling refrigeration unit is closed, when the outer tube force value of bushing type counterflow heat exchanger (6) is lower than external pressure, one-way pressure valve (16) will be closed voluntarily, cut-out is communicated with air.
7. according to claim 3 can the Stirling-throttling composite refrigerator of fast-refrigerating, it is characterized in that: described throttling refrigeration unit and stirling refrigeration unit separate on 26S Proteasome Structure and Function, adopt high pure nitrogen as refrigeration working medium, operating pressure 12-40MPa, purity is greater than 99.999%, impurity content is less than 5ppm, and dew-point temperature is greater than-65 DEG C, and solid impurity size is less than 5 μm.
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| CN106766315B (en) * | 2016-11-16 | 2019-06-14 | 昆明物理研究所 | There are two the inferior throttling refrigerators of miniature Han Consulting of throttle orifice for a kind of tool |
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| CN113465211B (en) * | 2021-05-31 | 2023-03-14 | 武汉高芯科技有限公司 | Linear Stirling-chip-level throttling composite refrigerator capable of rapidly refrigerating |
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