AIR CLEANER AND METHOD FOR JUDGING TIME FOR CLEANING OR CHANGING OF AIR CLEANER FILTER

摘要

The air purifier according to the present invention comprises a main body housing having an inlet through which outside air is introduced and a discharge opening through which the introduced air is purified and discharged, A dust concentration sensor which measures the concentration of dust around the filter, and a first concentration value measured from the dust concentration sensor during operation ) And the first density value ( ) And a second concentration value measured after a lapse of a predetermined time And a filter performance judging unit for judging whether to clean or replace the filter.