Patent ID: 8303697

Claim:
An apparatus for purifying polluted air having particle phase pollutants and gaseous phase pollutants, the apparatus comprising: a catalyst filtering core configured to treat the gaseous phase pollutants, the catalyst filtering core being installed downstream from a dust removal component for removing the particle phase pollutants; and a valve for selectively controlling a path of air flow within the apparatus and is movable between an open position and closed position, the valve being connectable to a central processing unit that is connectable to a dust sensor to measure an amount of particle phase pollutants in the polluted air, wherein, if the amount of particle phase pollutants measured by the dust level sensor in the polluted air is above a predetermined value, the valve is moved to the open position to enable the air to bypass the catalyst filtering core, and wherein if the amount of particle phase pollutants measured by the dust level sensor in the polluted air is less than a predetermined value, the valve is moved to the closed position to force the air to pass through the catalyst filtering core, the valve being positioned at a same level as the catalyst filtering core when it is closed.