How should an electric fan be used?
The electric fan is not too close to the human body. The best electric fan is placed about 2 meters away from the human body, which makes the wind more soft and even.
Turn on the fan too long, the body will cause discomfort. Body temperature will decrease with the evaporation of large amounts of sweat, over time, it is easy to cause cold, abdominal pain, diarrhea and other symptoms, to properly open, it is recommended to open for about 1 hours is appropriate.
When the opening air should not sleep too large, when people sleep, the body circulation slows down, and this is the most vulnerable time for the human body, the human body is too large to air blowing, the human body can cause envy to appear human fatigue symptoms, there will be serious stroke.
The electric fan is unfavorable to the person to blow, straight blows, the wind evil is easy to invade the body, especially when the body is weak or when sweating profusely, had better let the electric fan blow toward a corner.
The wind speed that the fan opens should not be too big, so that the human body has an adaptive process. The best control indoor wind speed of 0.2-0.5 meters per second, especially in a well ventilated room and in it's place, a wind speed of the electric fan is not too large.
