智能风扇设计 能使电风扇具有对环境进行检测的功能，当房间里面没有人时能自动的关闭电风扇；当温度下降时能自动的减小风速甚至关闭风扇-The smart fan design enables fans environmental detection function can automatically turn off fans when no one inside the room automatically when the temperature drops to reduce wind s