PROBLEM TO BE SOLVED: To provide an air purifier that can quickly switch gas concentration corresponding to a combination of airflow volume and concentration.SOLUTION: An air purifier comprises: an electrolytic cell part 15 which generates hypochlorous acid by electrolysis； a storage tank part 16 which holds hypochlorous acid water generated by the electrolytic cell part 15； a gas-liquid contact filter 7 of a cylindrical body which absorbs hypochlorous acid water by rotating in the storage tank part 16； a blowing part which blows air to the gas-liquid contact filter 7 to vaporize hypochlorous acid； a control part which controls operations of the gas-liquid contact filter 7 and the blowing part, in which the gas-liquid contact filter 7 is equipped with a plurality of serially arranged filter bodies 12 rotatably about a single axis separately, and the control part, in switching a diffusion operation of diffusing air containing hypochlorous acid into a cabin and a spot operation of blowing air containing hypochlorous acid against a human body, switches the number of the filter bodies 12 to be rotated.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2020,JPO&INPIT【課題】風量と濃度の組み合わせに応じてガス濃度を素早く切り替えることができる空気浄化装置を提供することを目的とする。【解決手段】電気分解で次亜塩素酸を生成する電解槽部１５と、電解槽部１５で生成した次亜塩素酸水を保持する貯留槽部１６と、前記貯留槽部１６において回転することによって次亜塩素酸水を含ませる円筒体の気液接触フィルタ７と、気液接触フィルタ７に空気を送風して次亜塩素酸を揮発させる送風部と、気液接触フィルタ７と送風部の運転制御を行う制御部とを備えた空気浄化装置において、気液接触フィルタ７は、直列に配置した複数のフィルタ体１２を一つの軸の周りで別々に回転可能に備え、前記制御部は、室内に次亜塩素酸を含んだ空気を拡散させる拡散運転と人体に次亜塩素酸を含んだ空気を当てるスポット運転とを切り替える際に、回転させるフィルタ体１２の数を切り替える。【選択図】図３
