AIR PURIFIER COMPRISING FIRST FILTER MEMBER, SECOND FILTER MEMBER AND AUXILIARY FILTER MEMBER HAVING RELATIVELY LOWER FILTERING CAPACITY THAN THE FIRST AND SECOND FILTERING MEMBERS

摘要

PURPOSE: To provide an air purifier which is able to extend a life space of a filter member and decrease vibration of two ventilation fans generated by resistance difference between two flow paths and noise generated thereby. CONSTITUTION: In an air purifier which performs air-purification operation that purifies inhaled indoor air and discharges the purified air to the indoor and ventilation operation that inhales the indoor air to discharge the inhaled air to the outdoor and inhales the outdoor air to discharge the inhaled air to the indoor, the air purifier comprises a first flow path (30) that includes a first inlet (31) to inhale the indoor air, a first exit (32) to discharge the inhaled air during the air purification operation to the indoor, and an exhaust port (33) to discharge the inhaled air during the ventilation operation to the outdoor, a second flow path (40) that includes a second inlet (41) to inhale the indoor air during the air purification operation, a port (42) to inhale the outdoor air during the ventilation operation, and a second exit (43) to discharge either the inhaled indoor air or the indoor air to the indoor, a first filter member (20a) which is placed at the first exit to separate contaminants from the indoor air discharged through the first exit, and a second filter member (20b) which is placed at the second inlet to separate contaminants from the indoor air inhaled through the second inlet.