English: every family has an electric hair dryer, because the hair dryer is an electric appliance that every family cannot leave! However, sometimes the hair dryer is broken and cannot be discarded. Let's introduce the common faults and maintenance methods of hair dryers. Those who are interested in home appliance maintenance can exchange views.
1. Introduction to the principle of electric hair dryer
Household hair dryers are used for drying hair and shaping, and also for drying food and clothing. When the electric blower is powered on, the motor drives the blades
Rotate to suck the air from the air inlet, heat it through the electric heating element, and blow out the hot air from the air outlet. The electric hair dryer is made by adjusting the electric heating element How much hot air with different temperature can be sent out, and the supply temperature and air volume can also be adjusted by adjusting the applied power supply voltage. The electric motor for hair dryer is usually single-phase series excitation motor and permanent magnet DC motor, and also single-phase shaded pole asynchronous motor. The input power is generally 6 ~ 30W and the rotation speed is 2500 ~ 15000r / min. The above motors are all powered by single-phase 220V, but the permanent magnet DC motor is supplied after the single-phase 220V is rectified and reduced to the DC voltage of 6 ~ 12V.
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