| 主权项 |
1. An air filtering device comprising:
a base having an air inlet and an air outlet; a fan assembly comprising a fan blade functionally attached to said base, wherein said fan assembly moves a volume of air through said air outlet; an air filter bag comprising a plurality of pores for filtering particulates, wherein said air filter bag further comprises a proximal open end in air flow communication with said air outlet of said base and a distal closed end, wherein said proximal open end defines an opening sized to at least circumference said fan blade, and wherein said volume of air flows into said proximal open end and flows out of said air filter bag through said plurality of pores; a substantially air impermeable outer sleeve comprising a first open end, a second open end, and an air flow path therebetween, wherein said outer sleeve is in air flow communication with said air outlet and wherein said outer sleeve is releasably attached to said base at said first open end, and wherein said outer sleeve envelops said air filter around its longitudinal axis. |
