Clean air equipment

Abstract

A clean air equipment that has a method for determining filter clogging that is both accurate and cost-effective. A clean air equipment having a filter, a wind speed sensor that measures the air speed after passing through the filter, a differential pressure sensor that measures the pressure difference before and after the filter, forming the second life prediction line so as to fit a changing rate of the first life prediction line obtained from the initial value of either one of the wind speed sensor or the differential pressure sensor and the value at the time of correction measurement with a changing rate of the second life prediction line obtained from another one of the wind speed sensor or the differential pressure sensor, managing the filter based on the first life prediction line or the second life prediction line.

Dependencies are inferred from the claim text.