Patent ID: 7201787

Claim:
An air cleaner comprising: a cabinet including an inlet through which a room air of a room is drawn, and an outlet from which a cleaned air is discharged to the room; a filter assembly to remove dust and smell particles from the room air drawn through the inlet; a fan located inside the cabinet so as to discharge the room air filtered by the filter assembly to the outlet after drawing the room air; a sensor assembly located inside the cabinet so as to sense composition of the room air drawn through the inlet; a supplier assembly located inside the cabinet so as to provide at least one of components of the room air to the room air filtered by the filter assembly; and a controller for controlling the supplier assembly to supply the at least one of the components of the room air to the room air filtered by the filter assembly when the sensor assembly senses an insufficient amount of the at least one of the components of the room air drawn through the inlet.