ION GENERATOR

摘要

An ion generator comprising discharge needles (2), counter electrodes (3) facing the discharge needles (2), and an ac high-voltage power supply (4) to generate corona discharge when a high voltage is applied between the discharge needles (2) and the counter electrodes (3) by the ac high-voltage power supply (4) to thereby generate positive and negative air ions, wherein the ac high-voltage power supply (4) is provided with a high-frequency oscillator (7) and a piezoelectric transformer (9) to output an high-frequency voltage. Insulation materials (5) are interposed between the high-voltage output wire (4a) of the ac high-voltage power supply (4) and the discharge needles (2) to allow them to be capacity-coupled and enable discharge from the discharge needles (2). Preferably, the surfaces of the counter electrodes (3) are coated with an insulation material. Accordingly, the generator construction is made small and lightweight, with balance between positive and negative air ion amounts and their stability enhanced.