Patent ID: 8057582

Claim:
An air cleaner comprising: (a) a housing including a dirty air inlet, a clean air outlet, and an interior; (b) a planer tubesheet in the housing interior having a plurality of openings in the same plane as the tubesheet; (i) the tubesheet being oriented in one of either generally horizontal or generally vertical position; (c) a plurality of z-media panel-style filters, each filter being mounted in a respective one of the openings in the tubesheet; each filter having a flow face and a center, the filter flow faces being generally parallel to the plane of the tubesheet; each of the filters being mounted in the respective one of the openings to permit air to flow through the filter faces in a straight flow through direction; and (d) a plurality of blowpipes (i) each blowpipe being oriented to direct a fluid pulse having a centerline at a respective one of the panel-style filters that is not aligned with the center of the filter; each fluid pulse being directed at an angle that is: (A) not normal to the plane of the openings in the tubesheet; (B) not in line with the direction of filtration flow through the respective panel-style filter; and (C) offset to the plane of the openings in the tubesheet of at least about 25Â°; and (ii) each blowpipe having an inside diameter and being spaced no more than 30-40 times of the inside diameter of the blowpipe from the tubesheet.