Although there are many kinds of hair dryers, they are all made up of shell, handle, dynamo, blade, electric heating element, windshield, switch, Datong and so on.
1. Housing. It has a protective effect on the internal parts and is an external decorative part.
Fan switch
2. Motor and wind blades. The motor is arranged in the shell, and the wind blades are arranged on the shaft end of the motor. When the motor rotates, the air is sucked in by the air inlet and the air is blown out by the air outlet.
3. Electric heating elements. The electric heating element of the hair dryer is wound with electric heating wire, and is arranged at the air outlet of the hair dryer.
Some hair dryers install a thermostat near the electric heating element and cut off the circuit when the temperature exceeds the predetermined temperature.
4. Windshield. Some blowers have a circular windshield at the air inlet to adjust the air volume. Without a circular windshield blower, you can cover a part of the air inlet with a piece of paper can also adjust the air volume. Less into the air volume, blowing out the wind is relatively hot, into the air volume is more, blowing out the wind is not too hot. It should be noted that the tuyere can not be blocked too much, otherwise it will damage the electric motor or burn out the electric heating element.
5. Switch. Hair dryer switch generally has "hot air," "cold wind," "stop" three gear position, commonly used white said "stop," red said "hot air," blue said "cold wind."
The electric heating element of some blowers is composed of two or three sections of heating wires, which are controlled by a selector switch.
With the reform and gradual improvement of the performance of hair dryers, the heating elements of hair dryers at home and abroad are now The utility model is provided with a group of thermostatic automatic electric control elements in series, which can automatically switch on the electric circuit under the normal working condition of the wind tube, and automatically cut off the electric circuit when encountering special circumstances (such as the phenomena of the electric heating element overheating, etc.) In the selection of the wind tube shell material, it is also made of metal (such as copper or cold-rolled iron) materials in the past, instead of thermoplastic engineering materials (mainly polycarbonate, modified polystyrene, modified polypropylene, etc.).
How this paragraph works
The blower drives the rotor directly by the motor to drive the blade to rotate. When the blades rotate, air is sucked in from the air inlet, and the resulting centrifugal air is blown out from the front nozzle of the blower. When the air passes through, if the heating wire on the heating bracket installed in the wind nozzle has been electrified and heated, the hot air is blown out; If the selector switch does not make the heating wire energized and heated, the cold air is blown out. The hair dryer is here to achieve the purpose of drying and shaping.
The selection switch on the hair dryer handle is generally divided into three gears, namely, closed gear, cold air gear, hot air gear, and accompanied by the color of white, blue, red signs. Some blowers are also equipped with a motor speed control switch on the handle for the selection of the size of the air volume and hot air temperature. A rotatable circular wind regulating cover is arranged behind or on the side of the shell of various hair dryers. By rotating the cover to adjust the cross section size of the air inlet, the conveying wind speed and the temperature of the hot air can be adjusted.
According to the use of points, there are handheld and stand hair dryer. Support type hair dryer can be placed on the table or hanging on the wall to use, you can give their own hair.
Hair Dryer 3
According to the way of air supply, there are centrifugal blower and axial blower. Centrifugal by motor-driven blade rotation, so that the air into the hair dryer to obtain inertial centrifugal force, and constantly outward exhaust. Its disadvantage is that the exhaust wind does not flow through the motor, the motor temperature is higher; The advantage is lower noise.