Summer season, the weather is getting hot, a lot of people but most people choose to summer or "Waterproof Cooling Fan", too covet cool, the fan is placed close to the location away from the body, long kept blowing, some people due to excessive improper use "Waterproof Cooling Fan" method, resulting in a cold, fever and other symptoms, you should do the proper use of electric fans, the following introduced "Waterproof Cooling Fan" issues should pay attention to proper use. Winds from the fans should not be too large open so that the human body has a process of adaptation. Indoor wind speed is best controlled at 0.2-0.5 m / sec, especially in ventilated rooms and in places, fans of the wind speed but can not be too large.