Qijun company launched high quality Capillary Thermostats. This kind of Capillary Thermostats have a thermistor inserted in the middle of the evaporator core like a coaxial.
Capillary Thermostats have a wire connected to the electronic circuit system. When the conversion temperature drops, the resistance value of the thermistor rises. When the surface temperature of the evaporator When the temperature is less than 4℃, the potential of pin 2 is lower than 4V (that is, when a trigger signal is added), the output pin 3 must be a high inverter, and the relay coil cannot be turned on, so the compressor control circuit is not powered and the electromagnetic clutch is disconnected.