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In the summer,
people like the neat wind which in the electric fan blows carrying off the summer day burning hot.
similarly, we are also blown the whole evening . But when the night comes, the temperature reduces, we often feel so cold and wake up to switches off the electric fan at night,
this will also affect the sleep. Mean while most of people have not felt cold,but when they wake up they will get the cold headache.
This is question
Fixes the fibrous plastic molding material of winding on the arm, small hot sensor imposition in armpit
The sensor detect the temperature change and Give directions to Fan
Wuhan University of Technology