Working principle of hair dryer

The working principle of a hair dryer is mainly to drive the rotor to rotate the fan blades through an electric motor, suck in air to form a centrifugal airflow, and then blow it out through the air outlet. If the heating wire becomes hot when electrified, hot air will be blown out; If there is no power, blow out cold air. ‌

The basic structure of a hair dryer includes the following parts:

Shell: protects internal components and serves as external decoration.

Electric motor and fan blades: The electric motor is installed inside the housing, and the fan blades are installed on the shaft end of the electric motor. When the electric motor rotates, air is drawn in from the air inlet and blown out from the air outlet.

Electric heating element: usually made of electric heating wire wound and installed at the air outlet. The air discharged by the motor is heated by the electric heating wire and turned into hot air to be sent out. Some hair dryers are equipped with thermostats near the electric heating element, which automatically cut off the circuit when the temperature exceeds the predetermined value, providing protection.

Windshield: Used to adjust the intake air volume, affecting wind temperature and speed.

Switch: There are usually three levels: "stop", "hot air", and "cold air", indicated by white, red, and blue respectively.

When using a hair dryer, safety precautions should be taken, such as avoiding prolonged use to prevent thermal injury, and paying attention to temperature and air volume adjustment during use to protect the motor and electric heating elements.