Warming up every day. The electric fan is necessary for human being. Electric fan that we use in daily life. In addition to help relieve the heat from the heat. The principle of the electric fan is also part of the cooling system. Used in household electric appliances. Until the cooling system in large scale industry. The electric fan of the world's first arise from the invention of the Choi Wheeler Wheeler engineer Americans. Graduated in science from Columbia College composition and function, a major component of the fan is divided into 4 majority. Blade and sieve cover rotor electric motor control switch function and mechanism make the fan stops with or rotate shaking fan will work when the electricity system. And when the press the select button to Blizzard or quickly according to user needs. Current tends to flow into the motor to make the motor obsessed Blade attached to the axis can rotate along the wind out.