"Blower Fan" is mainly composed of the following six parts: the motor, the air filter, blower body, the air chamber, the base (and fuel tank), drip mouth. Blower biased against the inner cylinder eccentric rotor operation, and the volume change of the blade rotor slots between air suction, compression, discharge. Use the blower during operation of the pressure difference between the automatic lubrication to drip nozzle inner cylinder was dropped to reduce friction and noise while maintaining the cylinder of gas is not reflux, also known as such blower vane blower.