1. Shell. It protects the internal parts and is an external decorative part.
2. Motor and fan. The motor is installed in the housing, and the air blade is installed on the shaft end of the motor. When the motor rotates, air is drawn in through the air inlet and blown out by the air outlet.
3. Electric heating element. The electric heating element of the hair dryer is wound with electric heating wire, and is installed at the air outlet of the hair dryer. The wind discharged from the motor is heated by the electric heating wire at the air outlet, and is sent out as hot air.
Some hair dryers are equipped with a thermostat near the electric heating element. When the temperature exceeds a predetermined temperature, the circuit is cut off to protect it.
4. Windshield. Some hair dryers have round wind deflectors at the air inlet to adjust the amount of air intake. For a hair dryer without a circular windshield, you can also cover a part of the air inlet with a piece of paper to adjust the air intake. The less the incoming air, the hot the wind blows out, and the more the incoming air, the less the wind blows out. It should be noted that the air vent should not be blocked too much, otherwise the motor will be damaged or the electric heating element will be burned due to the high temperature.
5. Switch. The blower switch generally has three positions: "hot air", "cold air" and "stop". White is usually used to indicate "stop", red is used to indicate "hot air", and blue is used to indicate "cold wind".
The electric heating element of some hair dryers consists of two or three sections of electric heating wire, which is used to adjust the temperature and is controlled by a selection switch.
With the reform and gradual improvement of the performance of hair dryers, the heating elements of most hair dryers at home and abroad are connected in series with a set of thermostatic automatic electrical control elements. It can automatically switch on the circuit under normal conditions of the hair dryer and encounter special conditions. (Such as overheating of the heating element), the circuit is automatically cut off. In the selection of the shell material of the air duct, it was also changed from the selection of metal (such as copper or cold-rolled iron plate) in the past to thermoplastic engineering materials (mainly polycarbonate, modified polybenzene, modified polypropylene, etc.). to make.