Through "Micro Cooling Fan" electronic governor circuit analysis to explain the working principle of the fan regulator, the circuit can lead to variable speed fan motor, but also to generate simulated natural wind fans. The fans of electronic governor circuit from the power circuit, a controllable oscillator and control the implementation of circuit, high pressure nozzles spray "Micro Cooling Fan" water under the influence of high pressure pumps, with dozens of kilograms of pressure generated by the high-pressure nozzle fog droplet diameter of less than 10 microns, thus greatly improving the evaporation surface area, micro-mist powerful fan blowing through the air, which greatly improves the liquid surface wind speed, accelerating the diffusion of gas molecules, thus greatly improve the amount of water evaporated, water heat absorption during the evaporation process, reduce the temperature, while improving air relative humidity, reduce dust, clean the air; this fan is through the use of high-pressure fog nozzles, so called high-pressure nozzle spray "Micro Cooling Fan".