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Air filter assemblies and components therefor are described. The air filter assembly typically includes an air filter cartridge. Air filter cartridges including a media pack comprising at least a first stack of single facer strips are described. In examples described, at least a portion of the first

Air filter assemblies and components therefor are described. The air filter assembly typically includes an air filter cartridge. Air filter cartridges including a media pack comprising at least a first stack of single facer strips are described. In examples described, at least a portion of the first stack of single facer strips is arcuate. Air filter assemblies are characterized that are configured, for example, to advantageously use such air filter cartridges. Example air filter assemblies are described that include pulse jet air cleaning systems.

대표청구항 ▼

1. An air filter cartridge comprising: (a) a media pack comprising at least a first stack including a plurality of single facer strips defining opposite inlet and outlet flow faces; (i) each one of the plurality of single facer strips in the first stack comprising a sheet of fluted media secured to

1. An air filter cartridge comprising: (a) a media pack comprising at least a first stack including a plurality of single facer strips defining opposite inlet and outlet flow faces; (i) each one of the plurality of single facer strips in the first stack comprising a sheet of fluted media secured to a sheet of facing media;(ii) the first stack including a stacking bead between adjacent single facer strips;(iii) the first stack including at least a first portion configured in an arcuate configuration of individual single facer strips oriented with respect to one another to form the arcuate configuration in at least a portion of at least one of the inlet and outlet flow faces;(iv) the media pack being closed to passage of unfiltered air completely therethrough; and,(v) the media pack is configured in a closed loop, around a central, open, volume. 2. An air filter cartridge according to claim 1 wherein: (a) the closed loop has a circular cross-section. 3. An air filter cartridge according to claim 1 wherein: (a) the media pack is positioned in extension between first and second end pieces; (i) the first end piece including an aperture therethrough in air flow communication with the open, central, volume; and,(b) the air filter cartridge includes a seal member positioned on a side of the first end piece opposite the media pack. 4. An air filter cartridge according to claim 3 wherein: (a) the aperture in the first end piece is oval-shaped. 5. An air filter cartridge according to claim 3 wherein: (a) the second end piece includes an aperture therethrough, in air flow communication with the open, central, volume; and,(b) the air filter cartridge includes a seal member positioned on a side of the second end piece opposite the media pack. 6. An air filter cartridge according to claim 1 wherein: (a) the media pack is formed from at least one blocked stack. 7. An air filter cartridge according to claim 1 wherein: (a) a stacking bead in the first portion of the first stack is position adjacent an inside arc of the arcuate configuration. 8. An air filter assembly comprising: (a) a housing including a housing body and an access cover; (i) the housing including an air flow inlet and an air flow outlet;(b) a first air filter cartridge removably positioned within the housing; the air filter cartridge comprising: (i) a media pack comprising at least a first stack including a plurality of single facer strips defining opposite inlet and outlet flow faces; (A) each one of the plurality of single facer strips in the first stack comprising a sheet of fluted media secured to a sheet of facing media;(B) the first stack including a stacking bead between adjacent single facer strips;(C) the first stack including at least a first portion configured in an arcuate configuration of individual single facer strips oriented with respect to one another to form the arcuate configuration in at least a portion of at least one of the inlet and outlet flow faces; and,(D) the media pack being closed to passage of unfiltered air completely therethrough;(E) the single facer strips, in the portion of the first stack configured in an arcuate configuration, being fanned apart adjacent the inlet flow face; and,(F) the first filter cartridge including a housing seal arrangement thereon;(i) the housing seal arrangement being removably sealed to the housing;(ii) the first air filter cartridge being removably secured in a position such that air flow passing through the first air filter cartridge from the air flow inlet to the air flow outlet must pass through media of the first air filter cartridge;(c) a dust ejector arrangement on the housing; and,(d) a reverse pulse jet cleaning system configured to selectively direct at least one cleaning pulse jet of gas through the media pack of the first air filter cartridge in a direction from the outlet flow face toward the inlet flow face and generally opposite to normal filtering flow. 9. An air filter cartridge according to claim 8 including: (a) a housing seal arrangement. 10. An air filter assembly according to claim 8 wherein: (a) the stack of is configured in a closed loop, around an open, central, volume;(b) the media pack is positioned in extension between first and second end pieces; (i) the first end piece including an aperture therethrough in air flow communication with the open, central, volume; and,(c) the first air filter cartridge includes a first, axial, housing seal member positioned on a side of the first end piece opposite the media pack. 11. An air filter assembly according to claim 10 wherein: (a) the first filter cartridge is mounted over a first yoke having a vane arrangement thereon. 12. An air filter assembly according to claim 11 wherein: (a) the first filter cartridge is mounted over a first yoke having four vanes configured as a first pair of vanes and a second pair of vanes; (i) the first pair of vanes forming an impermeable barrier extending in a direction across the open interior of the first filter cartridge; and,(ii) the second pair of vanes forming extensions on opposite sides of the impermeable barrier. 13. An air filter assembly according to claim 12 wherein: (a) the second pair of vanes is perforate; and,(b) the first pair of vanes forms a horizontal barrier. 14. An air filter assembly according to claim 13 including: (a) a first venturi member positioned in pulse jet flow direction alignment with the open interior of the media pack at a first side of the impermeable barrier formed by the first pair of vanes;(b) a second venturi member positioned in pulse jet flow direction alignment with the open interior of the media pack at a second side of the impermeable barrier formed by the first pair of vanes; and(c) the reverse pulse jet cleaning system including a first pulse jet valve/pulse director associated with the first venturi member; and a second pulse jet valve/pulse director associated with the second venturi member. 15. An air filter cartridge comprising: (a) a media pack comprising at least a first stack including a plurality of single facer strips defining opposite inlet and outlet flow faces; (i) each one of the plurality of single facer strips in the first stack comprising a sheet of fluted media secured to a sheet of facing media;(ii) the first stack including a stacking bead between adjacent single facer strips;(iii) the first stack including at least a first portion configured in an arcuate configuration of individual single facer strips oriented with respect to one another to form the arcuate configuration in at least a portion of at least one of the inlet and outlet flow faces; and,(iv) the media pack being closed to passage of unfiltered air completely therethrough; and,(b) a housing seal arrangement comprising a seal member positioned in extension around the media pack at a location between the inlet flow face and the outlet flow face; the housing seal arrangement being configured to removeably seal the cartridge in a housing, during use. 16. An air filter cartridge according to claim 15 wherein: (a) the first portion of the first stack, that is configured in the arcuate configuration, defines an arcuate portion in the outlet flow face and an arcuate portion in the inlet flow face; (i) the single facer strips within the arcuate configuration being fanned apart adjacent a flow face. 17. An air filter cartridge according to claim 15 wherein: (a) the first portion of the first stack, that is configured in an arcuate configuration, extends over an internal arc within the range of 30°-360°, inclusive. 18. An air filter cartridge according to claim 15 wherein: (a) the media pack is positioned with the single facer strips extending between first and second, molded-in-place, end pieces. 19. An air filter cartridge according to claim 15 wherein: (a) a stacking bead in the first portion of the first stack is position adjacent an outside arc of the arcuate configuration. 20. An air filter cartridge comprising: (a) a media pack comprising at least a first stack including a plurality of single facer strips defining opposite inlet and outlet flow faces; (i) each one of the plurality of single facer strips in the first stack comprising a sheet of fluted media secured to a sheet of facing media;(ii) the first stack including a stacking bead between adjacent single facer strips;(iii) the first stack including at least a first portion configured in an arcuate configuration of individual single facer strips oriented with respect to one another to form the arcuate configuration in at least a portion of at least one of the inlet and outlet flow faces; and,(iv) the media pack being closed to passage of unfiltered air completely therethrough;(b) a housing seal arrangement comprising a seal member configured to form a radially directed seal positioned in extension around one of the flow faces; the housing seal arrangement being configured to removeably seal the cartridge in a housing, during use. 21. An air filter cartridge comprising: (a) a media pack comprising at least a first stack including a plurality of single facer strips defining opposite inlet and outlet flow faces; (i) each one of the plurality of single facer strips in the first stack comprising a sheet of fluted media secured to a sheet of facing media;(ii) the first stack including a stacking bead between adjacent single facer strips;(iii) the first stack including at least a first portion configured in an arcuate configuration of individual single facer strips oriented with respect to one another to form the arcuate configuration in at least a portion of at least one of the inlet and outlet flow faces; and,(iv) the media pack being closed to passage of unfiltered air completely therethrough;(b) a sheath including the media pack positioned therein;(c) first and second side pieces positioned adjacent sides of the media pack; (i) at least one side piece having an aperture therethrough; and,(d) a housing seal arrangement positioned around the aperture into a side piece; the housing seal arrangement being configured to removeably seal the cartridge in a housing, during use. 22. An air filter cartridge comprising: (a) a media pack comprising at least a first stack including a plurality of single facer strips defining opposite inlet and outlet flow faces; (i) each one of the plurality of single facer strips in the first stack comprising a sheet of fluted media secured to a sheet of facing media;(ii) the first stack including a stacking bead between adjacent single facer strips;(iii) the first stack including at least a first portion configured in an arcuate configuration of individual single facer strips oriented with respect to one another to form the arcuate configuration in at least a portion of at least one of the inlet and outlet flow faces; and,(iv) the media pack being closed to passage of unfiltered air completely therethrough;(v) the media pack being positioned in extension between first and second end pieces;(b) the air filter cartridge including a seal member positioned on a side of the first end piece opposite the media pack; the housing seal arrangement being configured to removeably seal the cartridge in a housing, during use. 23. An air filter cartridge comprising: (a) a media pack comprising at least a first stack including a plurality of single facer strips defining opposite inlet and outlet flow faces and sealing first and second sides; (i) each one of the plurality of single facer strips in the first stack comprising a sheet of fluted media secured to a sheet of facing media;(ii) the first stack including a stacking bead between adjacent single facer strips;(iii) the first stack including at least a first portion configured in an arcuate configuration of individual single facer strips oriented with respect to one another to form the arcuate configuration in at least a portion of at least one of the inlet and outlet flow faces; and,(iv) the media pack being closed to passage of unfiltered air completely therethrough; and,(b) first and second side pieces secured over the first and second opposite sides of the media pack;(c) the media pack having opposite ends positioned on opposite sides of a cartridge outlet aperture; and,(d) a housing seal arrangement surrounding the cartridge outlet aperture; the housing seal arrangement being configured to removeably seal the cartridge in a housing, during use. 24. An air filter cartridge according to claim 23 wherein: (a) the media pack comprises a plurality of stacks each of which includes a plurality of single facer strips. 25. An air filter cartridge according to claim 24 wherein: (a) each one of plurality of stacks includes at least one portion configured in an arcuate configuration. 26. An air filter cartridge according to claim 25 wherein: (a) the filter cartridge comprises two stacks each of which comprise a slanted stack. 27. An air flow cartridge comprising: (a) a media pack comprising at least a first stack including a plurality of single facer strips defining opposite inlet and outlet flow faces; (i) each one of the plurality of single facer strips in the first stack comprising a sheet of fluted media secured to a sheet of facing media;(ii) the first stack including a stacking bead between adjacent single facer strips;(iii) the first stack including a plurality of sections each configured in an arcuate configuration of individual single facer strips oriented with respect to one another to form the arcuate configuration in at least a portion of at least one of the inlet and outlet flow faces; and,(iv) the media pack being closed to passage of unfiltered air completely therethrough;(v) the media pack includes at least two, spaced, oppositely curved arcuate sections. 28. An air filter cartridge according to claim 27 wherein: (a) the media pack is formed from at least one slanted stack.