CN1487281A - Vacuum cooling case - Google Patents
Vacuum cooling case Download PDFInfo
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- CN1487281A CN1487281A CNA031288286A CN03128828A CN1487281A CN 1487281 A CN1487281 A CN 1487281A CN A031288286 A CNA031288286 A CN A031288286A CN 03128828 A CN03128828 A CN 03128828A CN 1487281 A CN1487281 A CN 1487281A
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- cantilever
- cold
- vacuum cooling
- vacuum
- stop collar
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Abstract
The vacuum cooling case includes case, cooling platform and cantilever; and features the cantilever of low heat conductivity thin wall pipe; position limiting sleeve around the cantilever and micro annular interval between the cantilever and the position limiting sleeve. The present invention solves the technological problems related to lowering the heat conducting cold consumption of the cantilever and raising the resistance to radial vibration and shock of the cantilever.
Description
Technical field:
The invention relates to cooling, particularly store and the Vacuum cooling case of low-temperature working about infrared eye.
Background technology:
Infrared eye can reduce its internal thermal noise at low-temperature working, improves detector sensitivity, responsiveness and signal to noise ratio (S/N ratio).For this reason, high-sensitive infrared eye all adopts the Dewar type container or the Vacuum cooling case of vacuum interlayer, and the low-temperature working environment is provided.And, many otherwise effective technique schemes have been proposed at the refrigeration machine vibration problem that influences infrared eye work.Infrared eye is to be installed on the cold platform of Vacuum cooling case, and this cold platform is with being fixed on cantilever support on the casing rear wall in cabinet space.In order to reduce the loss of refrigeration capacity on the cold platform as far as possible, this cantilever be except should there being enough strength and stiffness, and uses outside the low Heat Conduction Material manufacturing, and also the loss of refrigeration capacity that its heat conduction should be caused reduces as much as possible.For this reason, can adopt the thin walled tube of low thermal conductivity material to make cantilever, tube wall is thinner, and the cold damage of heat conduction is littler, but has reduced its strength and stiffness, and easily causes radial vibration and impact, and the thin walled tube root that suspends will rupture owing to stress is concentrated.The cold damage of heat conduction that reduces cantilever has become a pair of contradiction of Vacuum cooling case cantilever with the ability that improves its opposing radial vibration and impact.
Summary of the invention:
The invention provides a kind of Vacuum cooling case, be the technical matters that solves the cold damage of heat conduction that reduces its cantilever and improve its opposing radial vibration and impact capacity.
The technical scheme that the present invention solves the problems of the technologies described above is as follows:
A kind of Vacuum cooling case comprises casing, cold platform and cantilever, it is characterized in that: this cantilever is the thin walled tube of low Heat Conduction Material; Be equipped with stop collar in this cantilever outer periphery, have micro annular between this stop collar and the cantilever.
Above-mentioned Vacuum cooling case is characterized in that: this cantilever is provided with gets rid of inner air tube to form the vent port of vacuum.
Above-mentioned Vacuum cooling case is characterized in that: the gold-plated polishing of this stop collar.
Above-mentioned Vacuum cooling case is characterized in that: this cold platform links to each other with the cold finger of low-temperature receiver with cold chain; This cold chain is by forming with fixedly connected two conduction cooling plates of cold platform, cold finger and flexible copper pigtail or the ripple copper strips that links to each other with this two conduction coolings plate respectively.
Advantage of the present invention is as follows:
1.. the cantilever of thin-walled tubulose and inner vacuum greatly reduces the loss of refrigeration capacity that its heat conduction causes.
2.. owing to be equipped with stop collar in the cantilever outer periphery, when cantilever was subjected to external force vibration and impacts, itself and stop collar came in contact, and motion is placed restrictions on, and the stress and the arm of force also reduce thereupon.For example, the stop collar contact is at the cantilever middle part, and then stress reduces 50%, and corresponding cantilever tube wall sectional area can reduce 50%, and loss of refrigeration capacity also can reduce by 50%.More close to cold platform with stop collar and cantilever contact position, then the tube wall of cantilever can be thinner, and loss of refrigeration capacity is also little.
3.. the setting of stop collar, jib-length is increased, its thermal resistance also increases, and helps reducing loss of refrigeration capacity.
4.. adopt flexible or telescopic cold chain to connect the cold finger of cold platform and low-temperature receiver, can further reduce the influence of the suffered low-temperature receiver vibration of cantilever, reduce its stress, help reducing its wall thickness.
Description of drawings:
Fig. 1 is a kind of structural representation of the present invention.
Fig. 2 is cold platform of the present invention, cantilever and stop collar structural representation.
Fig. 3 is the Vacuum cooling case vacuum exhaust and keeps structural representation.
Embodiment:
Now in conjunction with the accompanying drawings the present invention is elaborated.
See also illustrated in figures 1 and 2ly, Vacuum cooling case of the present invention comprises casing 3, cold platform 1 and cantilever 2.The logical light window that this casing 1 former configuration is made up of window-frame flange 8 and infra-red transmitting window 9 is provided with sealing ring 10 therebetween and carries out vacuum seal, and is screwed.Light signal then enters from this logical light window, for placing the infrared eye 12 on the cold platform 1 to survey.Casing 3 rear walls are the hermetically-sealed cable plate 4 with output lead pin 5, by screw retention on casing 3.Cantilever 2 rear ends are fixed on the hermetically-sealed cable plate 4, and it is suspended at the fixing cold platform 1 of front end in the casing 3.This cantilever 2 is the thin walled tube of low thermal conductivity material, its closed at both ends, and inside is vacuum state, and to eliminate the loss of refrigeration capacity that is caused by cross-ventilation and conduction, for getting rid of the air in cantilever 2 pipes, it is provided with vent port 20.The sidewall of casing 1 is provided with the vacuum tube flange 15 that is tightly connected mutually with low-temperature receiver; If low-temperature receiver has two, then the two side is respectively arranged with vacuum arrow flange 15.Be provided with the cold chain 30 that connects cold platform 1 and low-temperature receiver cold finger 14, cold be passed to cold platform 1 supply infrared eye 12 with low temperature.This cold chain 30 is made up of two conduction cooling plates 31 and the flexible copper pigtail between two conduction cooling plates 31 or ripple copper strips 32; This two conduction coolings plate 31 is fixedlyed connected with the cold finger 14 of cold platform 1 and low-temperature receiver respectively.This cold chain 30 has flexible scalable, and it can conduct cold effectively, but can prevent that conduct vibrations with low-temperature receiver to cold platform 1, can compensate the dimension chain tolerance of manufacturing simultaneously, reduces manufacturing accuracy, helps installing and reducing cost.For the electric signal with infrared eye 12 transfers to outside the casing 1, on cold platform 1, also be provided with transition feed-through collar 6, be welded with component lead 7 between the stitch of the terminal pin of infrared eye 12 and transition lead-in wire 6, on the stitch of the terminal pin 5 of hermetically-sealed cable plate 4 and transition feed-through collar 6, be welded with lead-in wire 11 again.
The cantilever 2 that is the thin-walled tubulose supports cold platform 1, transition feed-through collar 6, cold chain 30 and infrared eye 12, and its stress concentrates on root when being subjected to radial vibration, impact.In addition, the long more thermal resistance of material thermally conductive pathways is big more, so wish cantilever 2 bigger length is arranged, but thus, the stress of its root will increase with length, needs to increase its pipe thickness to improve strength and stiffness, prevents the fracture that the stress increase causes.This and pipe thickness are thinner, and loss of refrigeration capacity is healed little contradictory.Therefore, the present invention is provided with the stop collar 16 around cantilever 2 in casing 3, between this stop collar 16 and the cantilever 2 micro annular is arranged, because this annular gap thermal resistance when vacuum is very big, compare with the heat conduction of material, the loss of refrigeration capacity that this annular gap causes can be ignored.These stop collar 16 gold-plated polishings are penetrated shielding action to 2 width of cloth of cantilever simultaneously, reduce the cold damage of radiation heat exchange.When cantilever 2 was subjected to radial vibration, impact, this stop collar 16 contacted with cantilever 2 and plays a supporting role, and absorbed vibration and impulsive force, had significantly reduced the stress of cantilever 2 roots.And the contact position of stop collar 16 and cantilever 2 is more near cold platform 1 place, and the effect that absorbs vibration and impulsive force, minimizing cantilever 2 Root Stress is bigger, and then the pipe arm thickness of cantilever 2 just can approach as much as possible, is fully reduced its loss of refrigeration capacity.
For making very cold empty van when changing or repair infrared eye 12 and low-temperature receiver, need vacuum exhaust repeatedly, the Vacuum exhaust tube 31 with vacuum valve head 32 (referring to Fig. 3) can be set on casing 3 for this reason.All of casing 3 can gold-plated polished surface, all can carry out gold-plated polishing, to reduce its emissivity, reduces the loss of refrigeration capacity that is caused by radiation heat transfer.And in casing 3 and Vacuum exhaust tube 31, can be provided with getter 36.This getter 36 adopts energising active modes, absorbs residual gas in the casing 3 in the physical chemistry mode.Completely under the condition, getter 36 can repeatedly activate use in casing 3 sealed vacuum exhausts.Getter 36 can be inserted 34 by the hermetically-sealed cable that is screwed and change.Also can be provided with the getter chamber 33 of placing getter 36.
Claims (5)
1, a kind of Vacuum cooling case comprises casing (3), cold platform (1) and cantilever (2), it is characterized in that: this cantilever is the thin walled tube of low Heat Conduction Material; Be equipped with stop collar (16) in this cantilever outer periphery, have micro annular between this stop collar and the cantilever.
2, Vacuum cooling case according to claim 1 is characterized in that: this cantilever (2) is provided with gets rid of inner air tube to form the vent port (20) of vacuum.
3, Vacuum cooling case according to claim 1 is characterized in that: the gold-plated polishing of this stop collar (16).
4, Vacuum cooling case according to claim 2 is characterized in that: the gold-plated polishing of this stop collar (16).
5, according to claim 1,2,3 or 4 described Vacuum cooling cases, it is characterized in that: this cold platform (1) links to each other with the cold finger (14) of low-temperature receiver with cold chain (30); This cold chain is by forming with fixedly connected two conduction cooling plates (31) of cold platform, cold finger and flexible copper pigtail or the ripple copper strips (32) that links to each other with this two conduction coolings plate respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03128828 CN1204392C (en) | 2003-05-26 | 2003-05-26 | Vacuum cooling case |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03128828 CN1204392C (en) | 2003-05-26 | 2003-05-26 | Vacuum cooling case |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1487281A true CN1487281A (en) | 2004-04-07 |
| CN1204392C CN1204392C (en) | 2005-06-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03128828 Expired - Fee Related CN1204392C (en) | 2003-05-26 | 2003-05-26 | Vacuum cooling case |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1204392C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792761A (en) * | 2014-01-26 | 2014-05-14 | 中国科学院长春光学精密机械与物理研究所 | Device capable of changing cold diaphragm and imaging wave band of infrared camera |
| CN108955899A (en) * | 2018-07-24 | 2018-12-07 | 中国电子科技集团公司第十研究所 | Infrared detector Dewar and detector assembly |
| CN109654787A (en) * | 2019-01-22 | 2019-04-19 | 合肥锐联传热技术有限公司 | A kind of device of the thermally conductive radial adiabatic of axial elasticity low temperature |
| CN111928954A (en) * | 2020-07-27 | 2020-11-13 | 青岛凯瑞电子有限公司 | Miniature dewar of infrared detector |
| CN117269865A (en) * | 2023-11-20 | 2023-12-22 | 中国科学院电工研究所 | High-field animal magnetic resonance imaging conduction cooling superconducting magnet structure |
-
2003
- 2003-05-26 CN CN 03128828 patent/CN1204392C/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103792761A (en) * | 2014-01-26 | 2014-05-14 | 中国科学院长春光学精密机械与物理研究所 | Device capable of changing cold diaphragm and imaging wave band of infrared camera |
| CN108955899A (en) * | 2018-07-24 | 2018-12-07 | 中国电子科技集团公司第十研究所 | Infrared detector Dewar and detector assembly |
| CN108955899B (en) * | 2018-07-24 | 2020-12-18 | 中国电子科技集团公司第十一研究所 | Infrared detector dewar and detector assembly |
| CN109654787A (en) * | 2019-01-22 | 2019-04-19 | 合肥锐联传热技术有限公司 | A kind of device of the thermally conductive radial adiabatic of axial elasticity low temperature |
| CN109654787B (en) * | 2019-01-22 | 2024-01-30 | 合肥锐联传热技术有限公司 | Axial flexible low-temperature heat conduction radial heat insulation device |
| CN111928954A (en) * | 2020-07-27 | 2020-11-13 | 青岛凯瑞电子有限公司 | Miniature dewar of infrared detector |
| CN117269865A (en) * | 2023-11-20 | 2023-12-22 | 中国科学院电工研究所 | High-field animal magnetic resonance imaging conduction cooling superconducting magnet structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1204392C (en) | 2005-06-01 |
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Granted publication date: 20050601 Termination date: 20110526 |