To solve the problem associated with an air cleaner for cleaning indoor air, that an operating time necessary for cleaning indoor air is unknown and is hence desired to be notified although the state of the present uncleanness of the indoor air is recognized thereby.
The air cleaner includes an odor detection means 7 for detecting odor components present in an indoor ambience, a dust detection means 6 for detecting dust, an uncleanness-level determining means 12 for determining the level of the uncleanness of an object to be detected based on output from the detection means 6, 7, an uncleanness-level memorizing means 13 for memorizing the levels of the uncleanness in time sequence determined by the uncleanness-level determining means 12, and an operating time display 8 as a display means for estimating and displaying a remaining operating time necessary for the cleaning based on the uncleanness levels in time sequence memorized in the uncleanness-level memorizing means 13. Thus, the amount of indoor dirt can be pre-estimated by memorizing the amount of indoor dirt generated in time sequence, and the time necessary for the cleaning based on the current air flow rate can be calculated and displayed.
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Hiroki Naito
Daisuke Nagano
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