How does the thermostat of airconditioner and microwave work?
Answer:
Airconditioners have a temperature sensor thermostat switch that cuts the power to the pump when the low temperature for that setting is reached and turns it back on when the higher temperature is reached.
Microwave ovens don't have thermostats. They have power levels and a timer.
Mechanical thermostats use a "bimetalic" strip - which is two different metals bonded together and shaped into a coil. Then a mercury switch is attached - which is a small glass bulb with a pair of wires stuck in, and a ball of mercury in it.
As the temperature changes the metals expand at different rates, the strip coils and uncoils, tipping the switch and as the mercury touches the wires - it turns on.
The electronic ones - I'm guessing a basic thermocouple to read the temperature, and a logic circuit that compares temperature to set point, and using a transistor as a switch powers up or down to turn on as needed.
The answers post by the user, for information only, FunQA.com does not guarantee the right.
More Questions and Answers: