US 12,440,791 B2
Air filter assembly with improved liquid drainage
Daniel Iggander, Trosa (SE); Kenny Hedlund, Trosa (SE); Cheah Wei Ng, Ipoh (MY); and Muthu Krisnan Mageshvaran, Parit (MY)
Assigned to Camfil AB, Stockholm (SE)
Appl. No. 17/619,236
Filed by Camfil AB, Stockholm (SE)
PCT Filed Jul. 2, 2020, PCT No. PCT/EP2020/068629
§ 371(c)(1), (2) Date Dec. 14, 2021,
PCT Pub. No. WO2021/001470, PCT Pub. Date Jan. 7, 2021.
Claims priority of application No. 1950829-0 (SE), filed on Jul. 2, 2019.
Prior Publication US 2022/0241712 A1, Aug. 4, 2022
Int. Cl. B01D 46/00 (2022.01); B01D 46/52 (2006.01); B01D 46/58 (2022.01)
CPC B01D 46/0045 (2013.01) [B01D 46/0002 (2013.01); B01D 46/0031 (2013.01); B01D 46/521 (2013.01); B01D 46/58 (2022.01); B01D 2275/205 (2013.01)] 19 Claims
OG exemplary drawing
 
1. An air filter assembly comprising:
an air filter comprising a front frame having a front surface defining at least one rectangular aperture for receiving an air flow to be filtered, wherein said air filter is a panel filter, a deep pleat box filter, or a V-type filter, wherein said air filter comprises at least one rectangular pleated filter element, and wherein said air filter conforms to a filtration class from G4 up to H13 according to the standards EN779 or EN1822
a deflector element extending alongside the front surface at an edge portion of the front frame and adapted to deflect an air flow passing in through the rectangular aperture away from an adjacent inside surface of the air filter; and
a liquid drain formed between said deflector element and the front frame such that liquid collected along an inside surface of the air filter flows out the air filter through said liquid drain along the front frame and out the rectangular aperture at the front surface.