Patent ID: 7612981

Claim:
A fan-type ion generator including a dielectric body, a discharge electrode having fine protrusions arranged on the surface of this dielectric body, and an induction electrode arranged on the back surface of the dielectric body, comprising: an ion element in which by applying a sinusoidal AC high voltage to the discharge electrode, a potential difference from the induction electrode is generated, plasma is formed on the surface of the dielectric body, and positive ions, negative ions, and ozone are produced according to air ionization; and a fan which generates an airflow with respect to the discharge electrode, wherein the peak-to-peak voltage is not less than 3.5 kV and not more than 7 kV, the frequency f satisfies the following equation 7, and the relationship between the voltage V and the frequency f satisfies the following equation 10: C ion =C ion S −1.07×10 6 exp(− K ion f )≧0.8×10 6 Equation 7 C O 3 =f× 1.0×10 −4 exp( V p-p /1000)≦50 ppb Equation 10 In the equations, C ion : concentration of positive or negative ions, C ion s : balanced ion concentration, K ion : extinction coefficient, C O3 : ozone concentration.