1. The mechanical method uses two layers of metal with different coefficients of thermal expansion pressed together. When the temperature changes, its curvature will change. When it bends to a certain degree, the circuit will be connected (or disconnected) to make the refrigeration (or heating) equipment work< 2. Electronic temperature sensing devices such as thermocouples and platinum resistors convert temperature signals into electrical signals, and control relays through microcontrollers, PLCs, and other circuits to make heating (or cooling) equipment work (or stop)
An open type thermostat is a series of automatic control components that undergo physical deformation inside the switch according to temperature changes in the working environment, resulting in certain special effects and causing conduction or disconnection actions. Alternatively, electronic components work on different principles at different temperatures to provide temperature data to the circuit for collecting temperature data
