Introduction To The Thermostat

Introduction To The Thermostat

The thermostat uses the principle of pressure to push the contacts on and off. Its structure consists of a bellows, temperature bulb (test tube), eccentric wheel, micro switch, etc. to form a sealed induction system and a signal power transmission system.

There are generally two control methods; one is controlled by the temperature change of the object to be cooled, mostly using a vapor pressure type thermostat, and the other is controlled by the temperature difference of the object being cooled, mostly using electronic thermostat. The thermostat is divided into:

Mechanical type is divided into: steam pressure type thermostat, liquid expansion type thermostat, gas adsorption type thermostat, metal expansion type thermostat.

Among them, the vapor pressure type thermostat is divided into: inflatable type, liquid-gas mixed type and liquid-filled type. The mechanical type of household air conditioner is mainly based on this kind of thermostat.

Electronic type is divided into: resistance type thermostat and thermocouple type thermostat.

The main components of the circuit system are: thermostat, thermal protector, main control switch, running capacitor, running capacitor of fan motor. The function of thermostat is only to control the start and stop of the compressor.