The utility model relates to an air filtering device, which comprises a casing and a filtering unit.The shell has air inlet, exhaust port and power supply unit.The filter unit has a shell, a plurality of ultraviolet lamp elements, an efficient filter screen, and a fan assembly.The shell is installed in the internal holding space of the casing in a detachable manner, and the air flow inlet and air outlet respectively correspond to the air inlet and exhaust port of the shell.The air flow channels of the shell form a plurality of transverse through flow channels and a plurality of longitudinal bending flow channels.A plurality of ultraviolet lamp elements are arranged at intervals and protrude into a plurality of transverse through flow channels.The high efficiency filter screen and the fan assembly are installed on the shell.A plurality of ultraviolet lamp elements and the fan assembly are electrically connected to the power supply unit.一種空氣濾淨裝置，包括：機殼以及過濾單元。機殼具有進氣口、排氣口及電源供應單元。過濾單元具有殼體、複數個紫外燈元件、高效濾網、以及風機組件。該殼體以可拆裝的方式安裝於該機殼的內部容置空間，而使氣流入口及氣流出口分別氣流聯通地對應於該機殼的進氣口及排氣口 。該殼體的氣流通道依序形成複數個橫向貫通流道及複數個縱向彎折流道。複數個該紫外燈元件間隔設置且突伸進入複數個該橫向貫通流道。該高效濾網以及該風機組件安裝於該殼體。複數個該紫外燈元件以及該風機組件電性連接於該電源供應單元。
