Liu, a teacher who lives in East Lake frail, a bad heart, afraid to use air-conditioning, change blowing fan Relieves summer heat and can last two days to feel fatigue, headache, insomnia, also, can even the fans do not always open?

Expert analysis, Liu's fans may be open too much time feeling unwell and got a typical "fan disease." Fan to speed up the evaporation of sweat, but the constant low speed of change, not as good as natural wind moderate. Fans of "back to Tornado" on the role of people's eardrums are tremor, time is too long, people will be tired.

The elderly should be scientific use of fan, use the time to 30-1 minutes is appropriate; and speed not too fast; not direct blow, nor too close, blowing a period of time, should be reversed about the location of the fan in order to avoid partial suspension the wind for too long; not driving fans to sleep, the temperature is too high, could only "shaking his head," the breeze, and with the timing control.