"220V AC Cooling Fan" is widely used in computers, communications products, optical products, consumer electronics, automotive electronics, switches, medical equipment, heaters, air conditioners, inverter, ATM, car refrigerator, welding machines, induction cooker, audio equipment, environmental protection equipment, "220V AC Cooling Fan" refrigeration equipment and other equipment on a traditional or modern. Working principle is based on the energy conversion to achieve, namely: electricity electromagnetic energy → → → kinetic energy to mechanical energy. "220V AC Cooling Fan" circuit theory is generally divided into a variety of forms, using different circuits, there will be differences in the performance of the fan.