"220V Cooling Fan" mainly to address computers, electrical appliances, machinery, power supply cooling problems, reduce operating ambient temperature of equipment, extend equipment life. There are some devices utilize a fan of wind, air pressure to the complete functionality of the device, such as air table is the use of the fan pressure the ball can drift on the ball surface. "220V Cooling Fan" extremely kind of works: two main types of cooling fans and DC and AC a) DC cooling fan is to provide the use of a DC power supply: "220V Cooling Fan" DC motor has a stator and a rotor of two parts with the stator poles, rotor winding, the power, the rotor is also formed at an angle between the magnetic field of the stator and the rotor poles in the stator and rotor magnetic fields attract each other under the operation work.