Bi-directional shift cool switch for spacing mechanical refrigeration system

Abstract

The invention discloses a two-way displacement cold switch used in a space refrigeration system. The cold switch comprises a heat-conducting ring, a cold platform, and, arranged from the inside to the outside, a support inner drum, a shrinkable inner drum, a support outer drum and a shrinkable outer drum. The cold platform is welded on the support inner drum. The heat-conducting ring is welded on the shrinkable outer drum. A space for the switch-on / off of the cold switch is defined between the cold platform and the heat-conducting ring. The bottoms of the support inner drum and the shrinkable inner drum and the bottoms of the support outer drum and the shrinkable outer drum are thermally connected by welding, and the welded bottoms are thermally connected by heat-conducting chains. When a refrigerator runs, the cold energy is transferred from the bottom of the outer drums to shrinkable inner and outer drums, so that the shrinkable inner drum pushes the cold platform to move upwards and the shrinkable outer drum drives the heat-conducing ring to move downwards, thereby realizing the conduction of the switch. Contrarily, the switch is opened. The invention has the advantages that the cold switch is adapted to the two-way displacement, the length of the cold switch is reduced to about 40 percent of the one-way displacement cold switch, the heat transfer temperature difference of the refrigeration system is greatly reduced, the volume of vacuum chamber is reduced, and the total weight of the system is minimized.

Description

technical field [0001] The invention relates to a space low-temperature refrigeration system, in particular to a two-way displacement cold switch used in the space refrigeration system. Background technique [0002] In the space mechanical refrigeration system, due to the non-repairability of the refrigerator, in order to improve the reliability and life of the refrigeration system, it is necessary to use two or more refrigerators in the same system, one of which is in working condition, while the rest are in standby state; when one of them fails or reaches the end of its life, the other chiller starts working. [0003] Since multiple refrigerating machines are directly connected to the same cooled component, when one refrigerating machine is working, the other refrigerating machines will bring a large parasitic heat load to the refrigeration system. For this reason, it is necessary to realize the unidirectionality of cooling energy transfer between multiple refrigerators a...

AI Technical Summary

Problems solved by technology

Since its structure requires strict symmetry, the processing accuracy is very high, otherwise it will lead to unstable switch performance

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