Mechanical thermal switch and cryogenic system

The mechanical thermal switch uses a screw-driven multi-link mechanism to achieve parallel opening and closing of the clamping blocks, which solves the problems of uneven force and insufficient clamping force, improves heat conduction efficiency, and reduces heat leakage and vacuum leakage.

CN224353676UActive Publication Date: 2026-06-12TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
Filing Date
2025-04-30
Publication Date
2026-06-12

AI Technical Summary

Technical Problem

Existing mechanical thermal switches suffer from uneven force distribution on the opening and closing surfaces and insufficient clamping force, resulting in low heat transfer efficiency.

Method used

The multi-link mechanism driven by the screw moves the moving block in the first direction through the rotation of the screw. The moving block drives the clamping block to open and close in parallel through the multi-link mechanism, ensuring uniform force on the surface of the clamping block and improving heat transfer efficiency by increasing the clamping torque.

Benefits of technology

This achieves uniform force distribution on the clamping block surface, increases clamping torque, significantly improves heat conduction efficiency in the closed state, and reduces heat leakage and vacuum leakage.

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Abstract

This utility model relates to the field of cryogenic technology, providing a mechanical thermal switch and cryogenic system. The mechanical thermal switch includes a fixed component, fixedly mounted; a screw, stationary relative to the fixed component in a first direction; a movable block with a threaded hole, the movable block being sleeved on the outer periphery of the screw and threadedly connected to the screw; a pair of multi-link mechanisms, respectively hinged to both sides of the movable block, and the multi-link mechanisms being hinged to the fixed component; and a pair of clamping blocks, respectively hinged to the multi-link mechanisms. Under the rotation of the screw, the movable block moves in the first direction, and the movable block can drive the pair of clamping blocks to open and close in parallel in a second direction via the multi-link mechanisms. The mechanical thermal switch and cryogenic system provided by this utility model ensures uniform force on the contact surface through the parallel opening and closing of the clamping blocks, and the clamping blocks, driven by the screw, increase the clamping torque and improve heat conduction efficiency.
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