Production of "Waterproof Cooling Fan" is mainly composed of the following six components: motors, air filters, blower body, the air chamber, the base (and tank), drip mouth. Blowers biased against the inner cylinder rotor eccentric running, and "Waterproof Cooling Fan" volume changes between the blades of the rotor slots will air intake, compression, spit. Using "Waterproof Cooling Fan" in the operation of the automatic lubricating pressure difference to drip nozzle inner cylinder was added dropwise to reduce friction and noise, while maintaining the cylinder gas is not refluxed, such a blower is also known as vane-type blower.