[WapCar] Negative ion generator is a device that generates air negative ions, this device processes the input direct current or alternating current through EMI processing the circuit and the lightning strike protects circuits, and then passes the pulse circuit to limit the overvoltage and current. High and low voltage isolation and other lines are upgraded to AC high voltage, then the pure DC negative high voltage is obtained after rectification filter through special grade electronic materials, then connect the DC negative high voltage to the release peak made of metal or carbon element, and use the peak DC high voltage to generate high corona to rapidly release plenty of electron (e-), but the electron can not exist in the air for a long time (the life of the existed electron is only nS class) and will be catched by oxygen molecule (O2) in the air in a flash, thereby generating the air negative ion. Usually, there is the individual switch on the air conditioning panel, and also some cars make this configuration integrate in the fragrance system.