Because the structure of the hair dryer determines that it generally does not need grounding wire to ensure safety, the two holes are insulated and will not be charged, so there is no need to use a three-pin plug. If you want a three-hole plug, you can choose a three-hole hair dryer.

Hair dryers are mainly used for hair drying and styling, but they can also be used for local drying, heating and physical therapy in laboratories, physical therapy rooms, industrial production and artistic design. According to the type of motor used, it can be divided into AC series excitation type, AC shielded pole type and DC permanent magnet type. Series-excited fans have the advantages of large starting torque and high rotating speed, and are suitable for manufacturing high-power fans.

The disadvantage is that the noise is high, and the commutator has certain interference to telecommunication equipment. The advantages of hood blower are low noise, long service life and no interference with telecommunication equipment. Disadvantages are slow speed, poor starting performance and heavy weight. The advantages of permanent magnet hair dryer are light weight, high rotating speed, simple manufacturing process, low cost, good quality and low price.

Although there are many types of hair dryers, their structures are similar, and they are all composed of shell, handle, motor, fan blades, electric heating elements, windshield, switch, power cord and so on.