Patent ID: 9333452
Filing Date: 2016-05-10
CPC Classification: B01D

Claim Text:
1. A filter cartridge structure having a high efficiency particulate air filter (HEPA) of a dust collector, mounted at an air outlet of the dust collector and comprising: a filtration unit, the filtration unit having a casing, the casing having an accommodation room therein and a through hole above the accommodation room to communicate with the air outlet of the dust collector, a circumferential wall of the casing being formed with a plurality of through apertures, a filter being provided in the accommodation room of the casing, the filter being adapted to filter dust and fines; a cover, the cover being fitted on the filtration unit to seal the filtration unit, a circumferential side of the cover having at least one opening; and at least one high efficiency particulate filter, the high efficiency particulate filter being disposed at the opening, the high efficiency particulate filter being adapted to filter motes and particulates of the dust and fines.