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Lever type low-temperature thermal switch for coupling low-temperature refrigerator and cooled device

A low-temperature refrigerator, cooling technology, applied in the direction of thermal switch components, etc., can solve the problems of direct contact between cold and hot ends, high processing requirements, affecting thermal switch performance, etc., to achieve reliable performance and good unidirectionality. Effect

Active Publication Date: 2014-12-24
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above designs all have common shortcomings, because the switch gap is too small, the requirements for processing technology are high, and the deviation will cause direct contact between the cold and hot ends during assembly, which will affect the performance of the thermal switch.

Method used

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  • Lever type low-temperature thermal switch for coupling low-temperature refrigerator and cooled device
  • Lever type low-temperature thermal switch for coupling low-temperature refrigerator and cooled device

Examples

Experimental program
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Effect test

Embodiment Construction

[0038] The present invention will be further described in detail with the accompanying drawings and specific embodiments.

[0039] like figure 1 As shown, a lever-type low-temperature thermal switch for coupling a low-temperature refrigerator and a cooled device includes:

[0040] - cold end 1 and hot end 8 made of metal;

[0041] - the fixed cylinder 2 of ceramic material;

[0042] - Shrink rod 3 made of metal;

[0043] - the conductive strip 4 connecting the cold end 1 and the cylindrical contact block 7;

[0044] - lever 5 of metal material;

[0045] - lever support 6 of ceramic material;

[0046] The cold end 1 and the hot end 8 are connected together through a fixed cylinder 2;

[0047]The shrink rod 3, the conductive belt 4, the lever 5, the lever support 6 and the cylindrical contact block 7 are located inside the fixed cylinder 2;

[0048] There is a gap 9 between the cylindrical contact block 7 and the hot end 8;

[0049] The shrink rod 3, the lever 5 and the ...

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Abstract

The invention relates to a lever type low-temperature thermal switch for coupling a low-temperature refrigerator and a cooled device, which comprises the components of: a metal cold end and a metal hot end which are respectively connected with a cold head and a refrigerated element of the refrigerator; a ceramic fixing cylinder for fixedly connecting the cold end with the hot end; a contraction rod which contacts with the cold end; a cylindrical contact block which switches off and on the thermal switch; a metal lever and a ceramic supporter which matches with the metal lever; and an elastic heat-conductive strip with a contraction pretightening force. Through contraction and restoring of the contraction rod with a thermal expansion coefficient, displacement of the lever is generated, thereby realizing contact and separation between the cylindrical contact block and the cold end. Different material selections and lever proportions can realize convenient adjustment for gap size. Requirements for normally open, normally closed and opening / closing in actual operation can be satisfied. The lever type low-temperature thermal switch further has advantages of high unidirectional performance, sensitive reaction, small size and low cost.

Description

technical field [0001] The invention belongs to the technical field of refrigeration and low temperature, in particular to a lever-type low-temperature thermal switch for coupling a low-temperature refrigerator and a cooled device. Background technique [0002] Because of its large cooling capacity and small size, cryogenic refrigerators have attracted more and more attention as space refrigerators for infrared remote sensing instruments. However, with the development of modern space thermal imaging technology and infrared detection-tracking-search system, especially the wide application in military affairs, higher and higher requirements are put forward for space mechanical refrigeration technology. The most urgent requirement is longer working life , higher reliability and larger cooling capacity. In order to meet this space requirement, in addition to continuously developing high-performance mechanical refrigerators, multiple mechanical refrigerators can be used as mutua...

Claims

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Application Information

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IPC IPC(8): H01H37/48
Inventor 高昶
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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