AIR CLEANER

摘要

PROBLEM TO BE SOLVED: To provide an air cleaner at a low cost without requiring a sensor in which a switching of an operation air amount level is carried out when it is matched to a sense of a user. SOLUTION: The air cleaner is provided with a filter 13 for cleaning an air and a fan 15 capable of switching an operation air amount. The air cleaner is also provided with an automatic air amount switching operation mode for gradually reducing the operation air amount. In the automatic air amount switching operation mode, the operation air amount is not switched by an output of the sensor but the operation air amount is switched every at a passing time set based on a time required for reducing an odor intensity lank by a constant value.