Under normal conditions, "Micro Cooling Fan" includes three modes of heat transfer: conduction, convection and radiation. Conductive means to pass between the heat by direct contact with the object in one direction of the lower temperature of the high temperature side, the convection heat transfer by means of fluid flow, and radiation without using any medium, the heat generation of heat is released directly to the surrounding space. In practice, there are measures heat sink and fan or both of two ways simultaneously. Greatly increase the heat "Micro Cooling Fan" radiator and through close contact with the surface of the chip so that the chip is conducted to the radiator, the radiator is typically a blade with a lot of good conductor of heat, its full extension of the surface of the heat radiation , while the flow of air can take more heat. Fan use is also divided into two forms, one is mounted directly on the radiator surface, the other is mounted on the chassis and rack and improve air flow throughout the space. Ohm's law and the most basic circuit calculation similar, "Micro Cooling Fan" cooling calculations have a basic formula: temperature difference = resistance × Power