초록 ▼

Disclosed are pleated paper barrier type air filter elements having planar filter panels that are cleaned by a reverse air jet cleaning system which includes one or more specifically shaped cleaning air manifolds or heads in which a plurality of jet nozzles or orifices are arranged in a predetermine

Disclosed are pleated paper barrier type air filter elements having planar filter panels that are cleaned by a reverse air jet cleaning system which includes one or more specifically shaped cleaning air manifolds or heads in which a plurality of jet nozzles or orifices are arranged in a predetermined pattern to provide a totally enveloping air jet which is discharged into a flow tube immediately downstream of the clean air flow chamber of a generally tubular filter element. The jet pattern provides a temporary pressure seal within the flow tube and entrains a substantial amount of ambient air into the reverse flow jet to thoroughly flush elements to clean dust cake from the exterior surfaces thereof. The multiple jet arrangement reduces the overall space occupied by the reverse jet cleaining system and provides a larger mass flow of cleaning air. Multiple jet orifice heads or manifolds may be configured in virtually any geometric shape to provide a desired jet pattern. The planar filter panel elements allow high media face velocites with low flow tube velocities. Oval filters are provided which have a greater clean air flow area than a plurality of cylindrical elements fitted within the same dimensional envelope.

대표청구항 ▼

A porous media barrier type air filter unit, said filter unit including: a housing forming a filter chamber including means for conducting dust laden air into said chamber; a porous media barrier filter element in said filter chamber, said filter element including a first planar filter panel, said f

A porous media barrier type air filter unit, said filter unit including: a housing forming a filter chamber including means for conducting dust laden air into said chamber; a porous media barrier filter element in said filter chamber, said filter element including a first planar filter panel, said filter panel defining at least in part a clean air chamber for receiving air which has flowed through said filter element, said clean air chamber having an opening for discharging clean air from said clean air chamber, and said filter element including a second planar filter panel spaced apart from said first filter panel, said second filter panel cooperating with said first filter panel to define at least in part said clean air chamber; means for supporting said filter element in said filter chamber; means forming a flow tube opening into said clean air chamber for conducting clean air from said clean air chamber and away from said filter element; reverse flow air jet nozzle means disposed downstream of said filter element with respect to the direction of flow of clean air through said filter element, said nozzle means being in communication with a source of pressure air and including a plurality of orifices arranged in a predetermined pattern for discharging a shaped jet of pressure air for contact with the walls of said flow tube, said nozzle means being arranged in such a way as to generate a jet having a cross-sectional shape conforming to the cross-sectional shape of said flow tube and for inducting a relatively large volume of substantially ambient pressure air into said flow tube in a direction opposite to the direction of flow of clean air out of said flow tube to backflush said filter element with a quantity of combined induced and jetted pressure air.