FINE AIR FILTER BASED ON FIBROUS MATERIALS Russian patent published in 1997 - IPC

FIELD: air filtering equipment. SUBSTANCE: filter unit with a set of flat and undulated filter elements containing central undulated section formed by a group of parallel passages for air inlet and outlet, also flat frontal panels located over its length and adjacent to it at side of air inlet and outlet, and two side sections adjacent to undulated section and filter unit over their width. Side sections are located in undulated filter elements in planes which are at right or obtuse angle in relation to planes of flat frontal panels. Length of side sections equal to or larger than total width of central undulated section and flat frontal panels, width of side sections is equal to or larger than double height of central undulated section. Adjacent parts of flat and undulated filter elements are unsplitably connected to each other with forming continuous hermetic side walls of filter unit. Filter module contains filter unit basing on set of flat and undulated filter elements, housing components made as flat strips and their length is equal to length of filter elements and width is equal to or larger than width of filter elements in unit, and they are hermetically attached to outer side of filter unit in planes parallel to planes of flat frontal panels of filter elements in unit. Filter contains filter module based on unit and housing components and fastening parts in the form of connecting flanges or protruding blade strips or closed grooves for sealant. Filter modules in a group are hermetically connected to each other and have common fastening parts located over perimeter of filter. Filter can have several modules located so that planes of flat filter elements in unit of adjacent modules are interperpendicular. EFFECT: high efficiency. 13 cl, 57 dwg