Patent ID: 7179315

Claim:
A vertical-shaft air-filtering device having high flow rate and two-way air intake structure comprising: A hollow tube axially formed with a through inner hollow compartment in the interior: An air intake guiding base connected with the upper end of said hollow tube, said air intake guiding base having axially bored with an air intake in the center: and An air filter provided with a fundamental base having an vent hole axially bored in the center, said fundamental base fixed with the lower end of said hollow tube, said fundamental base having its topside secured with an annular filtering member extending upward to a preset height, said annular filtering member positioned inside said inner hollow compartment, said annular filtering member having its upper end provided with a fixed annular cover, said fixed annular cover formed with a through auxiliary air intake hole in the center, said auxiliary air intake aligned to said air intake of said air intake guiding base, and keeping away from each other for a preset distance, said air intake of said air intake guiding base and said auxiliary air intake and said vent hole of said fundamental base linearly communicating with one another, said auxiliary air intake having a strip-shaped filtering member provided at the upper side, said sheet-shaped filtering member firmly positioned under said fixed annular cover.