The automobile fan produced by automobile fan manufacturer is composed of automobile fan blade, automobile fan belt and motor. These three devices are relatively small and easy to carry and install. The working principle is very simple, is the car fan motor rotation drives the belt, the car fan can work normally. The significance of a car fan is to effectively dissipate heat for the car engine. Car fan manufacturers say fan blades do not work all the time, and that when the engine's temperature rises to a certain level, a temperature sensor sends an alarm and the fan automatically works.