"Small Cooling Fan" in the use of: cooling fan is mainly to solve the heat problem computers, electrical appliances, machinery, power supply, reducing the operating ambient temperature of equipment, extend the life of the equipment. There are some devices use the fan air flow, "Small Cooling Fan" pressure to complete device functions, such as air tables is to use the fan pressure on the ball so that the ball can drift countertops. Cooling fan works extremely kind: "Small Cooling Fan" is divided into two categories and DC and AC a) DC cooling fan is provided for the use of a DC power supply: