PROBLEM TO BE SOLVED: To allow the ability to remove dust in a dust collection device to be detected more accurately.SOLUTION: An air cleaning device 10 according to the present invention comprises: a dust collection device 110 arranged in the middle of a flow passage for air in a housing 130, and for removing dust contained in the air； an upstream side dust detection part 120a and a downstream side dust detection part 120b arranged upstream and downstream of the dust collection device 110 in the flow passage in the housing 130 respectively, and for detecting an amount of the dust contained in the air； and a control device 150 comprising a dust collection rate calculation unit 201 for calculating a dust collection rate that is an index indicating the ability to remove the dust in the dust collection device 110 on the basis of a detection result of the amount of the dust obtained by the upstream side dust detection part 120a and the downstream side dust detection part 120b.SELECTED DRAWING: Figure 1COPYRIGHT: (C)2020,JPO&INPIT【課題】集塵装置における塵埃を除去する能力をより精度良く検出することを可能にする。【解決手段】本発明の空気清浄装置１０は、筐体１３０内において空気の流路の途上に配設され、空気に含まれる塵埃を除去する集塵装置１１０と、筐体１３０内の流路において集塵装置１１０の上流側及び下流側にそれぞれ配設され、空気に含まれる塵埃の量を検出する上流側塵埃検出部１２０ａ及び下流側塵埃検出部１２０ｂと、上流側塵埃検出部１２０ａ及び下流側塵埃検出部１２０ｂによる塵埃の量の検出結果に基づいて、集塵装置１１０における塵埃を除去する能力を示す指標である集塵率を算出する集塵率算出部２０１を有する制御装置１５０と、を備える。【選択図】 図１
