"Small Cooling Fan" in the overview of the computer we are not unfamiliar, but should be very familiar with almost every day. Any mechanical products, only they do work, then there will be heat distribution, which is the fact that the same laws of thermodynamics. Currently, computers and other electronic products, such as life expectancy is based on thermal effects of view, it is precisely because of this need, and we therefore have a radiator, also called "Small Cooling Fan", to electronic products for cooling, thereby increasing its service life and the use of time. The original computer fans, known as "walking on two feet," The advantage of this design is that the two-pin fan cost comparisons savings, so much used in some less demanding situations; only drawback is to achieve the most simple function - let "Small Cooling Fan "turn up. When using this type of fan is to be noted that although only two pins, but the "positive and negative" can not engage in anti Otherwise fan "back hair" would undermine the original design of the wind, the cooling effect will be greatly reduced;