Electric Toothbrush Battery version electronic tooth brush

The hair dryer is composed of a set of heating wires and a small fan with high speed. When the power is turned on, the heating wire will generate heat, and the wind blown by the fan passes through the heating wire and becomes hot air. If only the small fan rotates and the heating wire is not hot, then only the wind is blown out and not hot.
The air blown by the hair dryer is dry air. If it is used for too long, it will easily cause the loss of water and cause thermal damage. The secret to minimizing the damage is: first pat dry the moisture on the hair with a towel, and gently use your hands to dry it. Comb your hair, then use the blow dryer. Hair dryers are mainly used for drying and shaping hair, but they can also be used for local drying, heating and physiotherapy in laboratories, physiotherapy rooms, industrial production, and art. According to the type of motor it uses, it can be divided into AC series excitation type, AC shaded pole type and DC permanent magnet type. The advantage of the series-excited hair dryer is that it has large starting torque and high rotational speed, and is suitable for making high-power hair dryers; The advantages of shaded-pole hair dryers are low noise, long life, and no interference to telecommunication equipment; the disadvantages are low rotational speed, poor start-up performance, and heavy weight. The advantages of the permanent magnet hair dryer are light weight, high speed, simple manufacturing process, low cost, high quality and low price.
Although there are many types of hair dryers, their structures are similar. They are all composed of shells, handles, motors, fan blades, electric heating elements, windshields, switches, and power cords. The rotor is directly driven by the motor to drive the fan to rotate. When the fan rotates, the air is inhaled from the air inlet, and the centrifugal airflow formed by this is blown out from the front nozzle of the fan. When the air passes through, if the heating wire on the heating bracket installed in the air nozzle has been energized and heated, the hot air will be blown out; if the selection switch does not make the heating wire energized and heated, the cold air will be blown out. The hair dryer is here to achieve the purpose of drying and shaping.
The selector switch on the handle of the hair dryer is generally divided into three gears, namely the off gear, the cold air gear, and the hot air gear, and there are signs in white, blue and red. Some hair dryers are also equipped with a motor speed control switch on the handle, which is used to select the size of the air volume and the temperature of the hot air. All kinds of hair dryers are equipped with a rotatable circular air-adjusting cover behind or on the side of the shell. By rotating the cover to adjust the cross-sectional size of the air inlet, you can adjust the conveyed wind speed and the temperature of the hot air.