Air filter arrangement; assembly; and, methods
Air filter cartridges are disclosed. Also described are air cleaners including the filter cartridges. Methods of assembly and use are also provided. Also, systems of use are described.
1. An air filter cartridge comprising:
(a) a filter media pack comprising filter media and having a first flow face and a second, opposite, flow face;
the filter media pack having a rectangular cross-sectional shape in a direction perpendicular to the central flow axis; and
(ii) the filter media pack comprising four sides, including a first pair of first and second opposite sides and a second pair of first and second opposite sides, extending between the first flow face and the second flow face;
(b) first and second side pieces positioned, respectively, on the first pair of first and second opposite sides of the filter media pack, wherein:
(i) the first and second side pieces are molded in place; and
(ii) the first and second side pieces each comprise a first abutment surface and a second abutment surface, wherein:
(A) the first abutment surface and the second abutment surface of the first and second side pieces are located beyond one of the first flow face and the second flow face of the filter media pack and in a direction away from the filter media pack;
(B) the first abutment surface and the second abutment surface of the first and second side pieces each extend a length and are constructed to engage an air cleaner housing, in use, to support the filter cartridge when the filter cartridge is installed in the air cleaner housing; and
(C) the first abutment surface and the second abutment surface of the first side piece are spaced from each other, and the first abutment surface and the second abutment surface of the second side piece are spaced from each other; and
(c) a housing seal arrangement for sealing the air filter cartridge to an air cleaner housing, in use, wherein:
(i) the seal member includes a seal surface that forms an axially directed seal, in use; and
(ii) the first abutment surface and the second abutment surface of the first and second side pieces are non-parallel to the seal surface of the seal member.
2. An air filter cartridge according to claim 1 wherein:
(a) the filter media pack comprises alternating fluted media and facing media.
3. An air filter cartridge according to claim 2 wherein:
(a) the alternating fluted media and facing media are secured to each other at one end of the first flow face and the second flow faces.
4. An air filter cartridge according to claim 2 wherein:
(a) the alternating fluted media and facing media comprises a stack of alternating strips of a fluted media sheet secured to a facing media sheet.
5. An air filter cartridge according to claim 1 wherein:
(a) the housing seal arrangement further comprises a receiving trough positioned inwardly from the seal surface that forms an axially directed seal, in use.
6. An air filter cartridge according to claim 1 wherein:
(a) the first and second side pieces each comprise a non-abutment surface separating each of the first abutment surface and the second abutment surface, wherein the non-abutment surface is constructed to not engage an air cleaner housing, in use.
7. An air filter cartridge according to claim 1 wherein:
(a) the seal member extends across the first pair of first and second sides of the filter media pack and across the second pair of the first and second sides of the filter media pack.
8. An air filter cartridge according to claim 7 wherein:
(a) the first abutment surface and the second abutment surface extend at an angle of at least 2 degrees to the seal surface of the seal member at a location along the seal member extending across the first and second side pieces.
9. An air filter cartridge according to claim 7 wherein:
(a) the first abutment surface and the second abutment surface extend at an angle of at least 2 degrees to 45 degrees to the seal surface of the seal member at a location along the seal member extending across the first and second side pieces.
10. An air filter cartridge according to claim 1 wherein:
(a) a portion of the seal surface of the seal member extends parallel to the filter media pack first flow face.
11. An air filter cartridge according to claim 1 wherein:
(a) a portion of the seal surface of the seal member extends at an angle of at least 2 degrees to a plane perpendicular to the central flow axis.
12. An air filter cartridge according to claim 1 wherein:
(a) the first abutment surface and the second abutment surface of the first and second side pieces are located beyond the first flow face in a direction away from the filter media pack.
13. An air filter cartridge according to claim 1 wherein:
(a) the first abutment surface and the second abutment surface of the first and second side pieces are located beyond the second flow face in a direction away from the filter media pack.
14. An air filter cartridge according to claim 1 further comprising:
(a) a protective material located over the second pair of first and second sides of the filter media pack.
15. An air filter cartridge according to claim 14 wherein:
(a) the protective material is secured in place against the filter media pack by molding the first and second side pieces to the first pair of opposite sides of the filter media pack.
16. An air filter cartridge according to claim 14 wherein:
(a) the protective material comprises cardboard or plastic.
17. An air filter cartridge according to claim 1 wherein:
(a) at least 30% of the second pair of first and second opposite sides of the filter media pack is uncovered.
18. An air filter cartridge according to claim 1 wherein:
(a) at least 40% of the second pair of first and second opposite sides of the filter media pack is uncovered.
19. An air filter cartridge according to claim 1 wherein:
(a) the first and second side pieces have an as-molded density of no greater than about 30 lbs./ft. 3 .
20. An air filter cartridge according to claim 1 wherein:
(a) the first and second side pieces have a hardness, Shore A, of no greater than about 30.