Filter assembly with pleated media V-packs, and methods
First Claim
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8. A cylindrical air filter element comprising:
- (a) an extension of filter media configured and arranged in a plurality of media portions, each media portion having;
(i) an external edge, an outermost edge, an internal edge and an innermost edge;
(ii) the external edges of adjacent portions joined together at an angle of about 4 to 26 degrees;
(iii) the internal edges of adjacent portions joined together at an angle of about 4 to 26 degrees;
(iv) the outermost edge being longer than the innermost edge;
(v) the internal edges and innermost edges of the plurality of media portions defining an inner perimeter;
(vi) the external edges and outermost edges of the plurality of media portions defining an outer perimeter;
(vii) a plurality of pleats defined by the filter media extending generally parallel to the outermost edge;
(b) the plurality of media portions configured to form a cylindrical arrangement.
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Abstract
A generally cylindrical filter element incorporating nonsymmetrical or asymmetrical V-pleated media. The V-pleated media provides increased filter media per given filter volume, extended filter life, and a smaller filter for equivalent filter life. A smaller filter is generally beneficial for some applications such as aircraft, due to its lower weight. Various features of the filter include asymmetric variable pleat heights applied to a cylindrical or obround filter; defined pleat spacing applied to a variable pleat height element; optimal pleat density; and optimal shape of inlet and outlet.
76 Citations
21 Claims
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8. A cylindrical air filter element comprising:
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(a) an extension of filter media configured and arranged in a plurality of media portions, each media portion having;
(i) an external edge, an outermost edge, an internal edge and an innermost edge;
(ii) the external edges of adjacent portions joined together at an angle of about 4 to 26 degrees;
(iii) the internal edges of adjacent portions joined together at an angle of about 4 to 26 degrees;
(iv) the outermost edge being longer than the innermost edge;
(v) the internal edges and innermost edges of the plurality of media portions defining an inner perimeter;
(vi) the external edges and outermost edges of the plurality of media portions defining an outer perimeter;
(vii) a plurality of pleats defined by the filter media extending generally parallel to the outermost edge;
(b) the plurality of media portions configured to form a cylindrical arrangement. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of cleaning air for an aircraft cabin, comprising:
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(a) providing a filter element comprising;
(i) an extension of filter media configured and arranged in a plurality of media portions, each media portion having;
(A) an external edge, an outermost edge, an internal edge and an innermost edge;
(B) the external edges of adjacent portions joined together at an angle of about 4 to 26 degrees;
(C) the internal edges of adjacent portions joined together at an angle of about 4 to 26 degrees;
(D) the outermost edge being longer than the innermost edge;
(E) the internal edges and innermost edges of the plurality of media portions defining an inner perimeter;
(F) the external edges and outermost edges of the plurality of media portions defining an outer perimeter;
(G) a plurality of pleats defined by the filter media extending generally parallel to the outermost edge;
(b) passing dirty air through the filter media from an inlet side of the filter media to an outlet side of the filter media; and
(c) obtaining cleaned air. - View Dependent Claims (1, 2, 3, 4, 5, 6, 7, 16, 17, 18, 19, 20, 21)
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19-1. The method of claim 15, wherein the step of providing a filter element comprises:
(a) providing a filter element having the inlet side of the filter media be defined by the inner perimeter and the outlet side be defined by the outer perimeter.
Specification