With the integration, the power density of the Day "220V Cooling Fan" more chips increase the temperature of the chip is becoming system stability, performance stumbling block. As a qualified electronic product design, in addition to the successful implementation of the product's features, but also must consider "220V Cooling Fan" stability, working life, environmental adaptability, and so on. And these are, and temperature has a direct or indirect relationship. Data show that 45 percent of the electronic "220V Cooling Fan" damage is due to high temperature. The importance of thermal design is visible.