"220V Cooling Fan" operating principle is based on the energy conversion to achieve, namely: the electromagnetic energy → electrical energy → mechanical energy → kinetic energy. The circuit is generally divided into a variety of forms, different uses of the circuit, there will be differences in the performance of the fan. There are air cooling effect, it transferred heat, can be compressed when it is compressed when the static air pressure transmission fluid. Although "220V Cooling Fan" fairly low thermal conductivity, but compared with other fluids, air is the most common thermal material, which is widely available, any application on the entire heating surface. "220V Cooling Fan" when you start your computer speed can be tested through the BIOS, or by other onboard monitoring software testing; can also speed tester. Note: The first two methods must be supported by the fan speed function can be measured.