"220V AC Cooling Fan" The main components are: AC motor. Its working principle is: energized coil in a magnetic field by the force of the rotation. Form of energy is transformed: the main electrical energy into mechanical energy, and because the coil has a resistance, so that there is an inevitable part of the electrical energy to be converted into heat. "220V AC Cooling Fan" to open the wind speed should not be too large, so that the human body has a process of adaptation. Indoor wind speed is best controlled at 0.2-0.5 m/sec, especially in better-ventilated room and have Guotang Feng in place, "220V AC Cooling Fan" of wind speed but can not be too large.