| CPC B01D 46/0027 (2013.01) [B01J 21/063 (2013.01); B01J 23/30 (2013.01); B01J 35/39 (2024.01); B01J 37/343 (2013.01)] | 23 Claims |

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1. A filtering system comprising:
a catalyst filter including a plurality of channels through which air is introduced; and
a light-emitting unit which radiates light towards a surface of the catalyst filter from which air is discharged for catalyst activation, wherein the light radiated from the light-emitting unit activates the surface of the catalyst filter from which air is discharged,
wherein the light-emitting unit includes a light source array including a plurality of first light sources corresponding one-to-one with the plurality of channels.
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