An object of the present invention is releasing a small and a large amount of negative ions without the use of a fan in the space such as a room to provide an air purifier that generates negative ions to diffuse. A facing discharge which is arranged to face at a distance S a needle-like electrode 22 with a tip on the center line of the aperture electrode body 24 with a circular aperture electrode 21 apertured electrode 21 the electrode 2 by applying a high voltage to an air purifier that generates a negative ion wind from the opening electrode 21, a current detector is provided, is provided with a notification unit for notifying on the basis of the increase of the sensed current.BACKGROUND 1【課題】ファンを用いることなく小型でかつ大量のマイナスイオンを室内などの空間に放出拡散させるマイナスイオンを発生する空気清浄器を提供する。【解決手段】円形の開口電極21を備えた開口電極体24と開口電極21の中心線上に先端部を備えた針状電極22を間隔Sを空けて対向して配置した対向放電電極2に高電圧を印加して開口電極21からマイナスイオン風を発生する空気清浄器であって、電流検知器を設け、検知された電流の増加に基づいて報知する報知器を設ける。【選択図】図1
