NEUTRALIZATION APPARATUS, ION BALANCE ADJUSTMENT CIRCUIT, AND ION BALANCE ADJUSTMENT ELECTRODE

摘要

A neutralization apparatus comprises a discharge electrode generating positive or negative ions depending on the polarity of a DC high voltage being applied, a high voltage generation circuit for applying a DC high voltage to the discharge electrode, and a grounded guard electrode which shuts out a forward space for delivering the ions with an appropriate profile. The discharge electrode is constituted of 2n (n is a natural number) discharge needles divided into two groups of n discharge needles. The high voltage generation circuit applies high voltages of reverse polarity to two groups of discharge needles, respectively, and reverses the polarity every predetermined period. The neutralization apparatus is compact and lightweight and exhibits excellent attenuation time characteristics and ion balance characteristics.