"Mini Air Cooling Fan" The main components are: AC motor. Its working principle is: energized coil in a magnetic field by the force of the rotation. Form of energy is transformed: the main electrical energy into mechanical energy, and because the coil has a resistance, so that there is an inevitable part of the electrical energy to be converted into heat. Fan means whereby hot days the wind take cold appliances fans, is a device to generate electricity driven airflow, fan energize within the configuration later to rotate into the wind to achieve natural shade effect. Different inlet and outlet will cause great changes in air flow resistance, of course, the bigger the better entrance opening. Not in the vicinity of the air inlet "Mini Air Cooling Fan" barrier placed objects (such as chips and interfaces, etc.) otherwise it will reduce the fan air flow. Rubber is preferably used to secure the "Mini Air Cooling Fan", instead of metal screws, to avoid vibrations. Fan of space design. For the fan efficiency, noise, and we must ensure that the fan housing from the fan is 5 ~ 10mm. Fan blades must be close to get a better efficiency.