Pleated filter media with embossed spacers and cross flow
DCFirst Claim
1. A panel filter element, comprising:
- a pleated filter media having peaks and valleys and having a clean and a dirty side, the pleated filter media having arrays of embossments projecting from one of the sides, and being arranged with sets of pleats having edges which are closed to form the clean side of the pleated filter media into pockets with openings adjacent to the valleys, and a peripheral seal around the filter media forming a barrier between the clean and dirty sides wherein dirty fluid passes through the filter media and emerges as clean fluid;
the arrays of embossments being arranged in columns extending between the peaks and valleys in a direction transverse to the peaks and valleys with some of the embossments being elongated and spaced to form gaps that allow fluid to flow between the embossments and wherein some embossments extend continuously from the peaks to the valleys to form channels directing fluid flow in a direction transverse to the peaks and valleys.
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Abstract
A panel filter element has a pleated filter media having peaks and valleys arranged in pleated sets of first and second panels. The pleated sets are adhered along side edges to form clean-side pockets which open adjacent to the valleys. The first and second panels have elongated embossments projecting both into and away from the pockets to keep the pockets open and to keep the pleated sets separate. Dirty air flows into the filter media both transverse to the peaks and laterally between the pleated sets of first and second panels. By having dirty air to be filtered flowing both transversly and laterally, the dirt holding capacity of the filter is increased while increases in restriction are minimized.
61 Citations
15 Claims
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1. A panel filter element, comprising:
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a pleated filter media having peaks and valleys and having a clean and a dirty side, the pleated filter media having arrays of embossments projecting from one of the sides, and being arranged with sets of pleats having edges which are closed to form the clean side of the pleated filter media into pockets with openings adjacent to the valleys, and a peripheral seal around the filter media forming a barrier between the clean and dirty sides wherein dirty fluid passes through the filter media and emerges as clean fluid;
the arrays of embossments being arranged in columns extending between the peaks and valleys in a direction transverse to the peaks and valleys with some of the embossments being elongated and spaced to form gaps that allow fluid to flow between the embossments and wherein some embossments extend continuously from the peaks to the valleys to form channels directing fluid flow in a direction transverse to the peaks and valleys.
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2. A filter element comprising:
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a continuous pleated filter media having a series of first and second panels having clean sides and dirty sides separated by folds, the clean sides being adhered adjacent the edges thereof to form pleated filter media sets with the folds forming the peaks that define one face of the pleated filter media with one of the sides of the panels forming closed filter media sets facing one another, the sets being joined by valleys of the pleated filter media, the valleys defining the other side face of the pleated filter media;
embossments projecting from both the clean and dirty sides of the filter media and extending in directions transverse to the peaks and valleys to keep the first and second panels separate from one another so that fluid may pass therebetween for flow through the filter media from the dirty sides of the first and second panels to the clean sides of the panels, the embossments including arrays of spaced embossments which let fluid pass laterally past the arrays, at least one continuous embossment in each first and second panel projecting from at least one of the sides of the first and second panels to separate the sides of the panels into portions, whereby fluid flowing laterally between the closed filter media sets and flowing transverse to one of the side faces is divided into separate fluid streams. - View Dependent Claims (3, 4, 5, 6)
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7. A filter media for inclusion with a filter element comprising:
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a web of filter media material having clean and dirty sides and first and second longitudinally extending edges, the web being divided by transverse fold lines into a plurality of first and second panels, wherein the first and second panels face one another on both the clean and dirty sides when the web is folded in opposite directions to form a pleated filter media having peaks and valleys extending transversely with respect to the edges providing a dirty side and clean side faces;
lines of adhesive extending on one of the sides of the web at the first and second edges of the web for adhering the first and second panels to one another at the first surface when the web is folded to form the pleated filter media, one of the side faces of the pleated filter media being free of adhesive so that fluid enters the filter media as the fluid flows between the peaks and the valleys and also as the fluid flows laterally from the first and second edges over one of the sides of filter media material laterally into the pleated filter media, and arrays of spaced embossments elongated in a direction normal to the peaks and valleys, the arrays of spaced embossments including a first array of spaced embossments in the web of media material projecting from the other side and engaging the other side of the filter media to maintain space between first and second panels on the other side so that filtered fluid emerges from the other side between the first and second panels as dirty fluid impinges on the dirty side of the filter media. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15)
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Specification