The hair dryer is mainly used for drying and shaping the hair, but it can also be used for local drying, heating and physiotherapy in laboratories, physiotherapy rooms, industrial production, art, etc. According to the type of motor used, it can be divided into AC series, AC shaded pole and DC permanent magnet. The advantages of the series-excited hair dryer are large starting torque and high rotation speed, which are suitable for manufacturing high-power hair dryers; the disadvantage is that the noise is large and the commutator has certain interference with telecommunication equipment. Shaded pole hair dryer has the advantages of low noise, long life, and does not cause interference to telecommunications equipment; the disadvantages are low speed, poor starting performance and heavy weight. The advantages of permanent magnet hair dryer are light weight, high speed, simple manufacturing process, low cost, and high quality.
Although there are many types of hair dryers, their structures are similar. They are composed of a housing, a handle, a motor, a wind blade, an electric heating element, a windshield, a switch, and a power cord.