US 11,986,764 B2
Filter media, filter media packs, and filter elements
Daniel E. Adamek, Bloomington, MN (US); Scott M. Brown, Faribault, MN (US); and Mark A. Sala, Lino Lakes, MN (US)
Assigned to Donaldson Company, Inc., Bloomington, MN (US)
Filed by Donaldson Company, Inc., Bloomington, MN (US)
Filed on Jan. 26, 2023, as Appl. No. 18/101,909.
Application 18/101,909 is a continuation of application No. 16/438,183, filed on Jun. 11, 2019, granted, now 11,596,893.
Claims priority of provisional application 62/683,542, filed on Jun. 11, 2018.
Prior Publication US 2023/0241542 A1, Aug. 3, 2023
Int. Cl. B01D 53/02 (2006.01); B01D 46/52 (2006.01)
CPC B01D 46/526 (2013.01) [B01D 46/527 (2013.01)] 20 Claims
OG exemplary drawing
 
1. An air filtration media element for removal of particulates from an airstream, the air filtration media element comprising:
a) a first plurality of upstream flutes; and
b) a second plurality of upstream flutes arranged in a parallel flow configuration with the first plurality of upstream flutes; the second plurality of upstream flutes exhibiting differences in flute shape, flute size, flute height, flute width, cross-flute area, flute length, or filter media relative to the first plurality of upstream flutes; wherein the first plurality of upstream flutes and second plurality of upstream flutes have a common upstream face and a common downstream face and having sealing plugs at a downstream face of each flute;
c) a plurality of downstream flutes having sealing plugs at an inlet face of each flute;
wherein the first plurality of upstream flutes and second plurality of upstream flutes have a common upstream face and a common downstream face;
wherein when loading of the filter element with dust the first and second plurality of upstream flutes performs as follows:
a) when the first and second plurality of upstream flutes are tested independently at the same media element velocity, the first plurality of upstream flutes has a lower initial pressure drop ΔP1,i than the initial pressure drop ΔP2,i across the second plurality of upstream flutes; and the initial slope at time a of the pressure drop/loading curve of the first plurality of upstream flutes Δ(ΔP1,i/L1,i)a is greater than the initial slope of the pressure drop/loading curve of the second plurality of upstream flutes Δ(ΔP2,i/L2,i)a:
Δ(ΔP1,i/L1,i)a>Δ(ΔP2,i/L2,i)a
b) if the first and second plurality of upstream flutes are combined and simultaneously tested with parallel flow, the first plurality of upstream flutes at time a has an initial velocity V1,a greater than the initial velocity V2,a of the second plurality of upstream flutes at time a:
V1,a>V2,a
c) if the first and second plurality of upstream flutes are combined and simultaneously tested with parallel flow, the first plurality of upstream flutes has at a subsequent time b an intermediate second velocity V1,b equal to intermediate velocity V2,b of the second plurality of upstream flutes:
V1,b=V2,b
d) if the first and second plurality of upstream flutes are combined and simultaneously tested with parallel flow, the first plurality of upstream flutes has at a subsequent time c a third velocity V1,c less than a third velocity V2,c of the second plurality of upstream flutes:
V.sub.1,c<V.sub.2,c.