How does capillary thermostat work

The principle of temperature controller: referred to as the main temperature controller or thermostat. Feel the temperature inside the refrigerator through the end of the capillary tube and convert it to the corresponding pressure. When it is lower than the stop temperature point preset by the knob, the contact shrapnel is turned over and the switch is disconnected. When it is higher than the preset boot temperature point of the knob, the contact shrapnel is turned over and the switch is turned on.