PROBLEM TO BE SOLVED: To provide an air cleaner which allows a user to easily recognize the fact that the air in a habitable room contains PM2.5 of the concentration which has a harmful influence on health.SOLUTION: An air cleaner includes a dust sensor capable of extracting the concentration of PM2.5 in the air, and a display part disposed in a front upper part of a housing and for performing display regarding the concentration of the PM2.5 in the air. The display part is formed by a two-color LED having a red LED element and a green LED element and it performs display in an orange color when the concentration of PM2.5 in the air has surpassed a first predetermined value, and performs display in a red color when the concentration of PM2.5 in the air has surpassed a second predetermined value higher than the first predetermined value.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2018,JPO&INPIT【課題】使用者が健康に影響を与える濃度のＰＭ２．５が居室内の空気に含まれていることを容易に認識することができる空気清浄機を提供する。【解決手段】空気中のＰＭ２．５の濃度を抽出することができる塵埃センサと、筐体の前面上部に配されて空気中のＰＭ２．５の濃度に関する表示を行う表示部と、を備えた空気清浄機において、前記表示部は、赤色ＬＥＤの素子と緑色ＬＥＤの素子とを有する２色ＬＥＤにより形成され、空気中のＰＭ２．５の濃度が第１所定値を超えた場合に橙色で表示を行い、空気中のＰＭ２．５の濃度が前記第１所定値よりも高い第２所定値を超えた場合に赤色で表示する。【選択図】図３
