Two-speed temperature control power supply switch

Abstract

A two-speed temperature control power supply switch comprises a switch shell, a sensor shell, a base, a double-metal piece, a push rod, a movable wafer and a fixed wafer. A footpace is disposed at the lower portion of an inner cavity of the sensor shell and used for placing the double-metal piece, wherein the double-metal piece is in the shape of a round piece and comprises an active metal layer and a passive metal layer. The active metal layer and the passive metal layer are closely combined to be in a double-layer structure. The upper end face of the active metal layer and the lower end face of the passive metal layer are cambered surfaces recessed in a direction from an active layer to a passive layer. The two-speed temperature control power supply switch can ensure that the double-metal piece is capable of generating deformation quickly and timely, enabling deformation kinetic energy to be accurately transmitted to a switch contact and achieving control on opening and closing of a contact connection circuit.

Description

technical field [0001] The invention relates to a circuit switch, in particular to a temperature-controlled switch whose trigger condition is temperature. Background technique [0002] Temperature-controlled power switches are usually mainly composed of contact switches, transmission components, sensors, bases and housings. While the sensor senses temperature changes, it is easily disturbed by the use environment, resulting in unstable triggering when reaching a specific temperature. In an environment with frequent temperature changes and many mechanical vibrations, it is easy to be falsely connected. [0003] In view of the above problems, consider using the physical characteristics of the bimetal as a temperature sensor. The bimetal sheet is composed of two metals or alloys with different expansion coefficients. The side with a higher expansion coefficient is the active layer, and the side with a lower expansion coefficient is the passive layer. The deformation of the act...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a two-speed temperature-controlled power switch, which solves the technical problem that the temperature-controlled material cannot quickly respond to temperature changes to generate deformation, and accurately transmits the deformation force to the switch contacts, and completes the subsequent circuit closing or opening in time.

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