"Waterproof Cooling Fan" on the roof of a mechanical fan originated, in 1830, a man named James Byron was inspired by American watches from the structure, the invention can be mounted on a ceiling, with a spring-driven mechanical fan. This fan blades rotate slowly bring cool people feel happy, but have to climb the ladder to the winding, very troublesome. "Waterproof Cooling Fan" 1872, a man named Joseph, of the French people and developed a turbo start by clockwork, gear drive chain means mechanical fan, this fan than mechanical fan Byron invention more refined, also easy to use Some. In 1880, the first time the Americans Shule blade mounted directly on the motor, "Waterproof Cooling Fan" connect the power supply, the rapid rotation of the blades, cool breeze blowing, which is the world's first fan. Rotor: the magnet, the blade and the shaft composition; stators: There silicon steel sheet, coil and bearing components; control circuit: IC induced by the magnet N. S. Pole circuit control via its coil is turned on and generates an internal excitation of the rotor to rotate. Type: axial fans, DC fans.