CN103615823A - Stirling-throttling composite refrigerator capable of quickly cooling - Google Patents
Stirling-throttling composite refrigerator capable of quickly cooling Download PDFInfo
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- CN103615823A CN103615823A CN201310660186.9A CN201310660186A CN103615823A CN 103615823 A CN103615823 A CN 103615823A CN 201310660186 A CN201310660186 A CN 201310660186A CN 103615823 A CN103615823 A CN 103615823A
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Abstract
The invention discloses a stirling-throttling composite refrigerator capable of quickly cooling. The stirling-throttling composite refrigerator comprises a stirling refrigerating unit and a throttling refrigerating unit. The sterling refrigerating unit and a packaging Dewar part are integrated in a DDCA mode, and a bushing type backflow heat exchanger of the throttling refrigerating unit is arranged in an empty cavity between a core column of the throttling refrigerating unit and a Dewar outer shell. The sterling refrigerating unit and the throttling refrigerating unit are integrally controlled by an electric control part of the sterling refrigerating unit to start and stop. The throttling refrigerating unit effectively utilizes the empty cavity in the Dewar part, the appearance structure and size of the overall refrigerating part of the composite refrigerator are consistent with those of a traditional integrated stirling refrigerating component, the stirling-throttling composite refrigerator is particularly suitable for cooling occasions of infrared components which have strict requirements for cooling time and long-term reliable work, on the premise of not changing the size of a connector, the existing integrated sterling refrigerating component is replaced, and a high cooling speed and long-term reliable work of the infrared components are achieved.
Description
Technical field
The present invention relates to a kind of compound refrigeration machine, specifically relate to a kind of compound refrigeration machine of Stirling-throttling that can 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 needs satisfactory Cryo Refrigerator that cooling condition is provided.
Regenerative refrigerating technology and dividing wall type Refrigeration Technique are two important branch in cryogenic refrigeration field, 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 respectively the typical Cryo Refrigerators in back-heating type and two kinds of Refrigeration Techniques of dividing wall type.Wherein, sterlin refrigerator utilizes motor-driven compressor structure and expansion mechanism, utilize the heat exchange between backheat filler and working medium to complete refrigeration effect, there is compact conformation, efficiency is high, the advantages such as volume is little, through long-term competition exploitation, assessment and substantial research, sterlin refrigerator is shown one's talent from all candidates' mini refrigerating machine, be widely used in night vision device, the cooler of missile brain etc., but sterlin refrigerator is activated assembly, the restriction of the design features such as transmission mechanism, initial pre-cool time is longer, it is restricted in the application that requires to obtain rapidly enough colds, j-t refrigerator utilizes Joule-Thomson effect, utilize gases at high pressure to expand into low pressure to produce refrigeration effect by throttling arrangement, throttling refrigerator has open type and two kinds of forms of enclosed conventionally, the throttling refrigerator of open circulation pattern adopts high-pressure gas device or pressure gas cylinder air feed, this system does not need the permanent connection between compressor and refrigerator, to the not restriction of the separation distance of compressor and cryostat, system is supplied with gases at high pressure continuously except requiring, not required power input, open type throttling device can be assembled into a complete system with little gas cylinder, have simple in structure, 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 need to form restricting element, heat exchanger and source of the gas Preparation equipment the circulatory system of sealing, compressor and refrigerator are permanent to link together, and this system can be used for a long time, but system architecture is complicated, bulky, its application is subject to great restriction.
In some application, both pre-cool time was had to harsh requirement, again the volume of detector and quality are had to strict restriction, for example infrared guidance system.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 be 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, can provide continually and steadily again the Miniature refrigerating device of cold to become inevitable demand.
The at present domestic research to sterlin refrigerator and j-t refrigerator is more, but the research that sterlin refrigerator and j-t refrigerator are combined is also comparatively rare.The feature of utilizing sterlin refrigerator to work reliably and with long-term, advantage in conjunction with open type throttling refrigeration device fast-refrigerating, the two is combined into a set of complete Stirling-throttling composite refrigeration system, both can reach rapidly required cryogenic temperature, 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 and start the technical disadvantages that the long and open type throttling refrigeration device of slow, pre-cool time can not long-term stable operation, provide a kind of and can steady in a long-term provide the compound refrigeration machine of Stirling-throttling of cold by fast-refrigerating simultaneously.
Technical scheme of the present invention is: a kind of compound refrigeration machine of Stirling-throttling that can 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 by automatically controlled 12 unified control start and stop of stirling refrigeration unit.
The present invention 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 a complete body independently, 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 of carrying out compound refrigeration machine, first carry out performance test, after performance touches the mark, carry out again the assembling with throttling refrigeration unit.
In the middle of cold head 5 tops of stirling refrigeration of the present invention unit, process circular cold head boss 19, the bottom face close contact of the upper surface of cold head boss 19 and cold cap 2, to reduce the heat transfer resistance of 2, cold head boss 19 and cold cap, the upper surface tight fit of the annular end face of cold cap 2 and cold head cold dish 20, edge is integrally welded by Laser Welding, weld will guarantee that the slip of refrigeration working medium is 10 under the absolute the blowing pressure of throttling refrigeration unit 40MPa
-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 and the rear annular fluid collection chamber 3 that forms throttling refrigeration unit of cold head cold dish 20 welding.
The bushing type counterflow heat exchanger 6 that throttling refrigeration of the present invention unit shows is closely coiled in from the bottom to top take the stainless steel thin-wall cylinder of both ends open on the outer wall of throttling refrigeration unit stem stem 17, stem stem 17 bottoms, throttling refrigeration unit are welded on the upper surface of cold finger pedestal 10, the upper and lower side of the outer tube of bushing type counterflow heat exchanger 6 and throttling refrigeration unit stem stem 17 outer walls is welded and fixed, the upper and lower side of bushing type counterflow heat exchanger 6 is drawn respectively corresponding length, upper end is for being connected with annular fluid collection chamber 3, lower end is for being connected with pipe joint 13, during welding, note avoiding damaging the outer tube of bushing type counterflow heat exchanger 6, in order to avoid cause the leakage of high pressure throttling refrigeration working medium.Throttling refrigeration unit stem stem 17 height should be lower than the height of cold finger 7, to keep the interior outboard chambers of throttling refrigeration unit stem stem 17 to be communicated with, thereby make Dewar 1 adopt an exhaust outlet to discharge the inner gas having living space, and due to contactless between the upper end of throttling refrigeration unit stem stem 17 and cold head 5, axial leakages by throttling refrigeration unit stem stem 17 in the time of can effectively reducing stirling refrigeration cell operation is hot.
The cold junction extension of bushing type counterflow heat exchanger 6 of the present invention (namely upper end) inserts the interior 5mm of shell of 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 one end welding with pipe joint 13, through the 11 places welding of Dewar adpting flange, realizing outer tube and Dewar adpting flange 11 seal weldings of bushing type counterflow heat exchanger 6, weld all will guarantee that the slip of refrigeration working medium is 10 under the absolute the blowing pressure of throttling refrigeration unit 40MPa
-9-10
-10pa.m
3/ s, and need to meet Dewar 1 vacuum leak hunting simultaneously and be better than 10
-12pa.m
3/ s.Bushing type counterflow heat exchanger 6 stretches out the left end seal welding of pipeline and pipe joint 13 outside the lower end of Dewar adpting flange 11, one-way pressure valve 16 is installed in the outer tube exit 21 of pipe joint 13, inner tube exit, right side 22 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, in gas cylinder 18, refrigeration working medium is housed, all connecting portions need strict leak detection, and each junction assurance high-pressure refrigeration working medium is not leaked.The gas cylinder 18 of throttling refrigeration unit is arranged on periphery, can change or cutoff high gas cylinder 18 according to compound refrigeration machine application scenario, applying working condition and service time, and gas cylinder 18 also can be according to concrete engineering applicable cases flexible arrangement.
Throttling refrigeration of the present invention unit sends start signal by automatically controlled 12, magnetic valve 14 is opened afterwards, high-pressure refrigeration working medium is flowed out by gas cylinder 18, through the pressure duct snap joint 15 of flowing through, flow through again magnetic valve 14, by pipe joint 13, flow out the internal helicoid capillary 4 of bushing type counterflow heat exchanger 6, after spiral capillary 4 throttling expansions, enter annular fluid collection chamber 3, heat exchange at the interior realization of annular fluid collection chamber 3 and cold cap 2, Working medium gas after heat exchange returns by the outer tube of bushing type counterflow heat exchanger 6, gases at high pressure in precooling spiral capillary 4, last one-way pressure valve 16 in pipe joint 13 is discharged to atmosphere.When throttling refrigeration unit is closed, the outer tube force value of bushing type counterflow heat exchanger 6 is during lower than external pressure, and one-way pressure valve 16 will be closed voluntarily, cuts off and being communicated with of atmosphere.Before coupling, throttling refrigeration unit and stirling refrigeration unit are 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 ℃, and solid impurity size is less than 5 μ m.
Two refrigeration units of the present invention can start simultaneously, also can start separately, and the fast cooling of cold head 5 can be realized in throttling refrigeration unit, and stirling refrigeration unit can maintain the long-term low temperature environment of cold head 5.Stirling refrigeration unit and throttling refrigeration unit are separate on function and structure, adopt different working medium refrigeration, middlely without gas circuit, are communicated with, and can debug respectively, test its function and carry out last assembling after normal again.
Advantage of the present invention is:
The present invention takes full advantage of Monobloc Stirling Cryocooler compact conformation, efficiency is high, little and the feature of sex work reliably and with long-term of volume, and coordinate open type throttling refrigeration body long-pending little, the advantage of fast-refrigerating, learn from other's strong points to offset one's weaknesses, form a kind of compound refrigeration system of Stirling-throttling that can fast-refrigerating, both solve sterlin refrigerator and be subject to decompressor thermal mass, the restriction of the design feature such as driven unit and transmission mechanism, the initial pre-longer shortcoming of cool time, system can promptly be lowered the temperature according to actual requirement, obtain rapidly cold, solve again open type throttling refrigeration device and be subject to the limited restriction of high-pressure air source air feed, realized a kind of not only can fast-refrigerating simultaneously but also the compound refrigeration machine of cold can steady in a long-term be provided.
Stirling refrigeration of the present invention unit and throttling refrigeration unit have independence separately on 26S Proteasome Structure and Function, can assemble respectively, test, carry out again last assembling, and can not cause larger impact to performance each other in assembling process, there is stronger engineering operability.The heat exchanger of throttling refrigeration of the present invention unit and throttle part have effectively utilized 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 (gas piping and the gas cylinder that do not contain throttling refrigeration unit), therefore this compound refrigeration machine can directly be used in the application of traditional stirling refrigeration assembly, in the situation that not changing interface size, directly substitute existing stirling refrigeration assembly.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is stirling refrigeration cellular construction schematic diagram;
Fig. 3 is throttling refrigeration unit and refrigeration position, stirling refrigeration unit coupling 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 exit 22.
The specific embodiment
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 and the mode direct-coupling that encapsulates Dewar 1 employing IDDCA, 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 by automatically controlled 12 unified control start and stop of stirling refrigeration unit.
As shown in Figure 2, stirling refrigeration of the present invention unit is classical Monobloc Stirling Cryocooler, comprise and drive automatically controlled 12, DC brushless motor, toggle, compression assembly and expansion assembly, it itself is a complete body independently, 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 of carrying out compound refrigeration machine, first carry out performance test, after performance touches the mark, carry out again the assembling with throttling refrigeration unit.
As shown in Figure 2, stirling refrigeration of the present invention unit cold head processes circular cold head boss 19 in the middle of 5 tops, the bottom face close contact of the upper surface of cold head boss 19 and cold cap 2, to reduce the heat transfer resistance of 2, cold head boss 19 and cold cap, the upper surface tight fit of the annular end face of cold cap 2 and cold head cold dish 20, edge is integrally welded by Laser Welding, and weld will guarantee that the slip of working medium is 10 under the absolute the blowing pressure of throttling refrigeration unit 40MPa
-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 and the rear annular fluid collection chamber 3 that forms throttling refrigeration unit of cold head cold dish 20 welding.The height of cold head boss 19 and diameter need consider that the cold of stirling refrigeration unit (as Fig. 2) expansion chamber is to the efficient transmission of cold cap 2 upper surfaces; The size of the annular fluid collection chamber 3 in throttling refrigeration unit (as Fig. 3) need be according to the heat exchange area of throttling working medium, and thermal mass and the needed temperature fall time of the article that are cooled that mount according to cold cap 2 upper surfaces are provided by calculation of thermodynamics optimization.
As shown in Figure 4, the bushing type counterflow heat exchanger 6 of throttling refrigeration of the present invention unit is closely coiled in from the bottom to top take the stainless steel thin-wall cylinder of both ends open on the outer wall of throttling refrigeration unit stem stem 17, stem stem 17 bottoms, throttling refrigeration unit are fixed by the upper surface of Laser Welding and cold finger pedestal 10, the upper and lower side of the outer tube of bushing type counterflow heat exchanger 6 and throttling refrigeration unit stem stem 17 outer walls is welded and fixed by silver soldering, and the upper and lower side of bushing type counterflow heat exchanger 6 is drawn respectively corresponding length, upper end is for being connected with annular fluid collection chamber 3, lower end is for being connected with pipe joint 13, during welding, note avoiding damaging the outer tube of bushing type counterflow heat exchanger 6, in order to avoid cause the leakage of high pressure throttling refrigeration working medium.Throttling refrigeration unit stem stem 17 height should be lower than the height of cold finger 7, to keep the interior outboard chambers of throttling refrigeration unit stem stem 17 to be communicated with, thereby make Dewar 1 adopt an exhaust outlet to discharge the inner gas having living space, and due to contactless between the upper end of throttling refrigeration unit stem stem 17 and cold head 5, axial leakages by throttling refrigeration unit stem stem 17 in the time of can effectively reducing stirling refrigeration cell operation is hot.The height of throttling refrigeration unit stem stem 17 and diameter need to consider the coiling size, stirling refrigeration cell operation of throttling refrigeration unit bushing type counterflow heat exchanger and the radiation heat transfer loss between cold finger 7 and throttling refrigeration unit stem stem 17 while closing of throttling refrigeration unit, by thermodynamic optimization design, are provided.
As shown in Figure 1, the cold junction extension of bushing type counterflow heat exchanger 6 of the present invention (namely upper end) inserts the interior 5mm of shell of annular fluid collection chamber 3, in junction, pass through Laser Welding or silver soldering seal welding, hot junction extension (namely lower end) is through the bottom of Dewar adpting flange 11, and one end welding with pipe joint 13, through Dewar adpting flange 11 places, by Laser Welding, realizing lower end outer tube and Dewar adpting flange 11 seal weldings of bushing type counterflow heat exchanger 6, each weld all will guarantee 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 need to meet Dewar 1 vacuum leak hunting simultaneously and be 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 left end seal welding of the lower end outer tube of Dewar adpting flange 11 and 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 exit, right side 22 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, in gas cylinder 18, refrigeration working medium is housed, all connecting portions need strict leak detection, and each junction assurance high-pressure refrigeration working medium is not leaked.It is peripheral that gas cylinder 18 is arranged on refrigeration machine assembly, can change or cutoff high gas cylinder 18 according to compound refrigeration machine application scenario, applying working condition and service time, and gas cylinder 18 also can be according to concrete engineering applicable cases flexible arrangement.
As shown in Figure 4, throttling refrigeration of the present invention unit sends start signal by automatically controlled 12, magnetic valve 14 is opened afterwards, high-pressure refrigeration working medium is flowed out by gas cylinder 18, through the pressure duct snap joint 15 of flowing through, flow through again magnetic valve 14, by pipe joint 13, flow out the internal helicoid capillary 4 of bushing type counterflow heat exchanger 6, after spiral capillary 4 throttling expansions, enter annular fluid collection chamber 3, heat exchange at the interior realization of annular fluid collection chamber 3 and cold cap 2, Working medium gas after heat exchange returns by the outer tube of bushing type counterflow heat exchanger 6, gases at high pressure in precooling spiral capillary 4, last one-way pressure valve 16 in pipe joint 13 is discharged to atmosphere.When throttling refrigeration unit is closed, the outer tube force value of bushing type counterflow heat exchanger 6 is during lower than external pressure, and one-way pressure valve 16 will be closed voluntarily, cuts off and being communicated with of atmosphere.
As shown in Figure 4, before coupling, throttling refrigeration unit and stirling refrigeration unit are 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 ℃, and solid impurity size is less than 5 μ m.Before carrying out the assembling of compound-refrigerating machine, throttling refrigeration unit can carry out separately carrying out last assembling after the performance property surveyed again.
Claims (8)
- One kind can fast-refrigerating the compound refrigeration machine of Stirling-throttling, 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 stem stem (17) and the empty volume between Dewar (1) shell of throttling refrigeration unit, and stirling refrigeration unit and throttling refrigeration unit are by automatically controlled (12) unified control start and stop of stirling refrigeration unit.
- 2. the compound refrigeration machine of Stirling-throttling that can fast-refrigerating according to claim 1, it is characterized in that: 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, helium purity is more than 99.999%, and the blowing pressure is at 3.2-3.5MPa.
- 3. the compound refrigeration machine of Stirling-throttling that can fast-refrigerating according to claim 2, 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 bottom face close contact of the upper surface of cold head boss (19) and cold cap (2), the upper surface tight fit of the annular end face of cold cap (2) and cold head cold dish (20), edge is integrally welded by Laser Welding, weld will guarantee that the slip of helium is 10 under the absolute the blowing pressure of throttling refrigeration unit 40MPa -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) and the rear annular fluid collection chamber (3) that forms throttling refrigeration unit of cold head cold dish (20) welding.
- 4. the compound refrigeration machine of Stirling-throttling that can fast-refrigerating according to claim 1, it is characterized in that: the bushing type counterflow heat exchanger (6) of described throttling refrigeration unit is closely coiled in from the bottom to top take the stainless steel thin-wall cylinder of both ends open on the outer wall of throttling refrigeration unit stem stem (17), throttling refrigeration unit stem stem (17) bottom is welded on the upper surface of cold finger pedestal (10), the upper and lower side of the outer tube of bushing type counterflow heat exchanger (6) and throttling refrigeration unit stem stem (17) outer wall is welded and fixed, and the upper and lower side of bushing type counterflow heat exchanger (6) is drawn respectively corresponding length, upper end is for being connected with annular fluid collection chamber (3), lower end is for being connected with pipe joint (13), throttling refrigeration unit stem stem (17) height should be lower than the height of cold finger (7).
- 5. the compound refrigeration machine of Stirling-throttling that can fast-refrigerating according to claim 4, it is characterized in that: the cold junction extension of the bushing type counterflow heat exchanger (6) of described throttling refrigeration unit namely upper end inserts 5mm in the shell of annular fluid collection chamber (3), in junction seal welding, hot junction extension namely lower end through the bottom of Dewar adpting flange (11), and one end welding with pipe joint (13), through Dewar adpting flange (11), locating lower end outer tube and Dewar adpting flange (11) seal welding that welding realizes bushing type counterflow heat exchanger (6), weld all will guarantee 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 need to meet Dewar (1) vacuum leak hunting simultaneously and be better than 10 -12pa.m 3/ s.
- 6. the compound refrigeration machine of Stirling-throttling that can fast-refrigerating according to claim 4, it is characterized in that: described bushing type counterflow heat exchanger (6) stretches out the left end seal welding of lower end outer tube and the pipe joint (13) of Dewar adpting flange (11), one-way pressure valve (16) is installed in the outer tube exit (21) of pipe joint (13), the inner tube exit, 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 is equipped with refrigeration working medium in (18), each junction assurance high-pressure refrigeration working medium is not leaked.
- 7. the compound refrigeration machine of Stirling-throttling that can fast-refrigerating according to claim 4, it is characterized in that: described throttling refrigeration unit sends start signal by automatically controlled (12), magnetic valve (14) is opened afterwards, high-pressure refrigeration working medium is flowed out by gas cylinder (18), through the pressure duct snap joint (15) of flowing through, flow through again magnetic valve (14), by pipe joint (13), flow into the internal helicoid capillary (4) of bushing type counterflow heat exchanger (6), after spiral capillary (4) throttling expansion, enter annular fluid collection chamber (3), in annular fluid collection chamber (3), realize the heat exchange with cold cap (2), Working medium gas after heat exchange returns by the outer tube of bushing type counterflow heat exchanger (6), gases at high pressure in precooling spiral capillary (4), finally the one-way pressure valve (16) in pipe joint (13) is discharged to atmosphere.When throttling refrigeration unit is closed, the outer tube force value of bushing type counterflow heat exchanger (6) is during lower than external pressure, and one-way pressure valve (16) will be closed voluntarily, cuts off and being communicated with of atmosphere.
- 8. the compound refrigeration machine of Stirling-throttling that can fast-refrigerating according to claim 4, it is characterized in that: described throttling refrigeration unit and stirling refrigeration unit are 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%, impurity content is less than 5ppm, and dew-point temperature is better than-65 ℃, and solid impurity size is less than 5 μ m.
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| CN106766315A (en) * | 2016-11-16 | 2017-05-31 | 昆明物理研究所 | It is a kind of that there are two inferior throttling refrigerators of miniature Han Consulting of throttle orifice |
| CN109073293A (en) * | 2016-06-06 | 2018-12-21 | 法国红外探测器公司 | Cryo Equipment with compact exchanger |
| CN110486990A (en) * | 2019-08-29 | 2019-11-22 | 上海理工大学 | Choke block and multilevel bionic type microchannel throttling refrigerator |
| CN112555123A (en) * | 2020-12-10 | 2021-03-26 | 武汉高芯科技有限公司 | Linear compressor capable of maintaining balance position of piston unchanged |
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| CN113465211A (en) * | 2021-05-31 | 2021-10-01 | 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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| CN117553445A (en) * | 2024-01-09 | 2024-02-13 | 浙江拓感科技有限公司 | Infrared detector quick start integrated refrigerator subassembly |
| CN118423923A (en) * | 2024-07-02 | 2024-08-02 | 中国科学院上海技术物理研究所 | Cryocooler and Dewar coupling device with backup function |
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