Although the "24V DC Cooling Fan" has been occupied an important position in the home appliances market, but compared with the current rate of development of high-end home appliances, air-conditioning products in incursions into the background, the former flourishing fan industry has shrunk . However, survey data found easy to use, flexible, energy-efficient products is still a huge fan of the market demand for space. Function selection focused on the desktop, floor fans respect. These two "24V DC Cooling Fan" is generally divided into standard electronic universal and luxury categories. The former is simple structure, easy operation, low price for its features, generally having a governor and the commutation of two functions; the latter to complex functions, features luxury beautiful shape. "24V DC Cooling Fan" for purposes of the decision to choose based on the premise of practicality or practical, decorative, luxurious taken into account.