How hair dryer works

The motor directly drives the rotor to drive the fan blades to rotate. When the fan blades rotate, air is sucked in from the air inlet, and the resulting centrifugal airflow is blown out from the front nozzle of the air dryer. When the air passes through, if the heating wire on the heating bracket installed in the air nozzle is energized and heated, hot air will be blown out; if the selector switch does not enable the heating wire to be energized and heated, cold air will be blown out. This is where the hair dryer is used for drying and shaping purposes.
The selector switch on the hair dryer handle is generally divided into three levels, namely off, cold air, and hot air, and is accompanied by white, blue, and red color indicators. Some hair dryers are also equipped with a motor speed control switch on the handle, which can be used to select the air volume and hot air temperature. All types of hair dryers are equipped with a rotatable circular air-adjusting hood on the back or side of the casing. By rotating the hood to adjust the cross-sectional size of the air inlet, the delivered wind speed and the temperature of the hot air can be adjusted.
According to the use method, there are handheld and pedestal hair dryers. The pedestal hair dryer can be placed on the table or hung on the wall, allowing you to blow dry yourself.
According to the air supply mode, there are centrifugal blowers and axial flow blowers. The centrifugal type relies on a motor to drive the fan blades to rotate, so that the air entering the hair dryer obtains inertial centrifugal force and continuously exhausts the air outward. Its disadvantage is that not all the exhaust air flows through the motor, and the motor heats up higher; its advantage is that the noise is lower.
The axial flow motor drives the fan blades to rotate, pushing the air entering the hair dryer to flow axially, and continuously exhausting the air outward. Its advantage is that all the exhaust air flows through the motor, the motor has good cooling conditions, and the insulation is not prone to aging; its disadvantage is that it makes a lot of noise.
According to the material used in the shell, there are metal hair dryers and plastic hair dryers. Metal-type hair dryers are durable and can withstand higher temperatures. Plastic hair dryers are light in weight and have good insulation properties, but they are prone to aging and have poor high temperature resistance.