The summer weather is hot, and this time to pay attention to cooling the summer heat, the fan is one of the methods to eliminate the heat, but the use of improper electric fans and many people get sick, the occurrence of colds, facial nerve palsy, frozen shoulder, back pain and other diseases. The reason for this is that many people lack the common sense to use electric fans. The following science and technology to blow the misconceptions of the electric fan, let’s learn about it. 1, blowing directional wind of the electric fan, mostly shaking head fan, blowing wind when the fan constantly move the position and direction, blowing wind formed a large a small, so that the body surface of the wind slowly some, will not make people feel too cool, feel the whole body temperature uniform. Therefore, it is best to use the shaking head fan, do not blow directional wind. 2, sleep blowing that is, using electric fans to cool down with sleep. When people are asleep, the function of the organs of the body to the lowest level, all reflexes disappear, immunity is reduced, prone to disease. 3, long blowing Many people like to blow the electric fan for a long time, think just blowing cool the body to stop, will feel the body is still hot, not as long as comfortable blowing. However, a long time blowing on the electric fan, the body temperature will drop with the evaporation of sweat, easily caused by wind, cold, abdominal pain, diarrhea and other diseases. Generally blowing for half an hour to an hour at a time is appropriate. 4, high-speed blowing some people in order to cool up as soon as possible, they will open the electric fan to the highest speed, that the wind is too much to solve the heat, which is inappropriate practice. When the temperature exceeds 30 ℃, the air temperature is close to the normal body temperature, electric fans blowing wind, but also high-temperature wind, the body’s heat should mainly rely on sweat evaporation heat, if the electric fan wind blowing too much, the skin surface temperature drops, pores closed, the body does not emit internal sweat, but also feel the heat, but also fatigue and weakness, back pain, which is “holding sweat”. Therefore, it is not appropriate to use electric fans high-grade high-speed blowing wind, should be adjusted to medium or low speed, blowing gentle gusts of breeze for good. 5, blowing near the wind electric fan blowing wind should not be placed very close to the body, if the close blowing strong wind, and only blowing one side of the body, so that the wind side of the skin sweat evaporates quickly, the temperature is significantly lower, and blowing the side of the wind, sweat evaporates slowly, resulting in blood circulation and sweat excretion gap between the two sides of the body is too large, the nerve center will be out of balance, once too long, the organs will be exhausted, thus feeling whole body discomfort. Therefore, when blowing electric fans, the best distance from people in 2 meters away, so that the wind blowing evenly and softly. In order to safely spend a healthy summer, be sure to blow the fan correctly.