1. Different internal devices:
(1) The negative ion hair dryer is mainly equipped with a negative ion generator and a semiconductor refrigeration device, so that when the hair dryer works, it can produce negatively charged ion particles (generated by the negative ion generator) and water vapor particles (generated by the semiconductor refrigeration device).
(2) The ordinary blower is composed of a group of electric heating wires and a small fan with high speed.
2. Different working principles:
(1) Negative ion hair dryer: the hair dryer will be heated in the work, the wind will make the hair dry, and the use of comb is inevitable, so the hair is easy to generate static electricity, and static electricity will make the hair shape, bending, or warping.
According to the design of special mesh wire (or anion generator) in the negative ion fan, the air blown out carries negative ions, neutralizes the positive charge in the hair, so as to smooth the hair, make it smooth and smooth, and eliminate static electricity. Let the hair more smooth and easy to comb, the modeling effect is more ideal.
(2) The ordinary blower directly drives the rotor by the motor to drive the blades to rotate. When the blades rotate, the air is drawn in from the air inlet, and the centrifugal air flow thus formed is blown out from the front mouth of the air duct.
When the air passes through, if the heating wire installed on the heating bracket in the air nozzle has been electrified and becomes hot, the hot air will be blown out; if the selection switch does not electrify the heating wire, the cold air will be blown out. Hair dryer is to achieve the purpose of drying and shaping.

Extended data
Function of blower components:
1. Housing. It protects the internal parts and is also the external decorative parts.
2. Motors and blades. The motor is installed in the shell and the fan blade is installed on the shaft end of the motor. When the motor rotates, air is drawn in from the air inlet and blown out from the air outlet.
3. Electric heating element. The electric heating element of the hair dryer is made of electric hot wire. It is installed at the air outlet of the hair dryer. The air discharged by the motor is heated by the electric hot wire at the air outlet, which turns into hot air.
Some blowers are equipped with thermostats near the electric heating elements. When the temperature exceeds the predetermined temperature, the circuit is cut off to play a protective role.
4. Windshields. Some blowers have round windscreens at the air inlets to regulate the air intake. A blower without a round wind shield can cover a part of the air inlet with a piece of paper, and the air inlet can also be adjusted.
If the air intake is small, the wind will be hot. If the air intake is large, the wind will not be too hot. It should be noted that the air outlet cannot be blocked too much, otherwise the motor will be damaged or the electric heating elements will be burned due to the high temperature.