display cooler fan motor circuit display cooler fan motor circuit: the upper end of the power plug-> thermostat-> defrost timer contact 1, 3-> insurance-> fan motor Ml-> fan switch -> the lower end of the power plug. Because the fan switch is integrated with the door light switch, the fan switch is turned off only when the refrigerating door is closed, and the fan motor runs, but when the refrigerating door is opened, the fan switch is disconnected and the fan motor stops. Defrost timer circuit: the upper end of the power plug-> thermostat-> Huaning timer contact 1, 3-> defrosting timer motor M2-> defrosting thermostat-> lower end of the power plug. Because the defrost thermostat is fixed on the reservoir at the outlet of the freezer compartment evaporator or accumulator, and is connected at low temperature and disconnected at high temperature, the defrost timer will only start to count when the freezer compartment is cooled to a certain level . Current path during defrosting. When the contacts 1 and 2 of the defrosting timer are turned on, the defrosting circuit works. The circuit is: the upper end of the power plug-> thermostat-> defrost timer 1, 2-> Super heat insurance-> defrosting heater-> defrosting thermostat-> power plug lower end. The defrosting heater is heated to turn the frost into liquid, which is led into the water receiving tray from the water outlet. The temperature in the display cooler gradually rises. When the temperature rises to the set temperature, the defrosting thermostat is disconnected and the defrosting circuit stops working. At this time, the defrost timer motor starts to rotate again, and its current path is: the upper end of the power plug-> thermostat-> defrost timer 1, 2-> super thermal insurance-> defrost heater-> Frost timer motor-> overheat protector-> compressor operating coil-> power plug lower end. Because the current flowing through the defrost heater is very small, about 15mA, the heater will not generate heat and the compressor will not work. They only serve to provide a current path for the motor. When the motor rotates for about 2 minutes, the contacts 1 and 2 of the defrost timer are disconnected, and the contacts 1 and 3 are connected, and the display cooler repeats the cooling operation. The above articles are from refrigerated showcase display cooler and display cooler. For details, please log in: www.ihdjx.com Free Order Hotline: +86 18019567573 Contact: Mr. Shao 26066250@qq.com