The hair dryer is a combination of a set of electric heating wires and a small fan with high speed. When energized, the heating wire generates heat, and the wind blown by the fan passes through the heating wire and becomes hot air. If only a small fan rotates, and the heating wire does not heat, then the wind blows out but not the heat.
The wind blown by the hair dryer is dry. If it is used for a long time, it will easily cause water loss and thermal damage. The secret to minimize the damage is: use a towel to pat the hair on the hair first, and gently Comb your hair and then use a hairdryer.