Air purifier and filter assembly therefor

Details Air purifier and filter assembly therefor Air purifier and filter assembly therefor

1997-12-11

1999-04-13

Woo, Jay H.

Gas separation

With gas flow effecting means

Impeller within or proximate to space encompassed by...

55472, 55473, 55496, 55501, 55DIG34, B01D 4652

Patent

active

058939393

ABSTRACT:
An air purifier, an air filter and a method of manufacturing an air filter for an air purifier are provided. The air purifier includes a base assembly, a filter assembly and a grill. A fan is mounted to the base assembly, and draws air through the filter assembly. The base and filter assemblies include adjoining walls having openings which are substantially smaller in area than the areas of the adjoining walls and area through which air is drawn in through the filter assembly. A resilient gasket having a passage approximately the size of these openings is positioned between the adjoining walls. The filter assembly is drawn towards the base assembly when the fan is operated, thereby enhancing the seal formed by the gasket against the adjoining walls. Unfiltered air is accordingly unlikely to bypass the filter assembly. The air filter is manufactured in an efficient manner through the use of a back plate having oblique end portions. A pleated HEPA filter is positioned in a U-shaped configuration and the ends thereof adhered to the oblique end portions. Top and bottom walls are then applied to the resulting structure.

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