A thermal switch driven by shape memory alloy in one direction

Abstract

The invention discloses a shape memory alloy one-way driven heat switch. The heat switch comprises a first structure panel, a second structure panel and a driving part arranged at an interval, wherein the driving part comprises a locating restriction plate, a flexible band and a structure restriction plate; one end of the locating restriction plate is fixed to the first structure panel; the structure restriction plate is fixed to the second structure panel; a shape memory alloy wire is arranged in the flexible band; the other end of the flexible band has a first working state in which the other end of the flexible band is connected with the structure restriction plate, and a second working state in which the other end of the flexible band is separated from the structure restriction plate under the action of the shape memory alloy wire; and the flexible band can be oppositely fixed with the second structure panel when in the first working state, and can do a relative movement together with the second structure panel under the action of external force when in the second working state. The heat switch has the advantages of simple design, high adaptability, small structure size and weight, small influence on a restricted structure and convenient multi-switch cooperative control.

Description

technical field [0001] The invention relates to a temperature control device, in particular to a heat switch unidirectionally driven by a shape memory alloy. Background technique [0002] For spatially expandable structures, there are two states of folded and unfolded panels for various expandable panels. When in the folded state, there will be a development force between the panels of some expandable structures. When there is no external constraint, the panels will automatically move. In addition, the size of the constraints between the panels is small and cannot affect the panel. development of sports. Moreover, when arranging multiple constraints, there is a problem of synchronous control or delayed control, and a new type of switch needs to be designed to control this constraint. [0003] A thermal switch is a heat transfer component that is actively controlled by controlling the thermal resistance of the structural heat conduction path. So far, thermal switch technol...

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Problems solved by technology

[0005] The technical problem to be solved in the present invention is to design a thermal switch device based on shape memory alloy unidirectional drive in view of the deficiencies in the prior art, and utilize the brand new principle that shape memory alloy has a shape before being deformed at high temperature, and design The structure has the advantages of high control reliability, simple design, small size and weight, and easy processing and production.

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