Patent ID: 9580178
Date: 2017-02-28
CPC Classifications: B64D,F24F,Y02T

Claim:
1. A quiet cabin air diffuser assembly comprising: a duct having a duct inlet, a duct outlet downstream of the duct inlet, and an outlet plenum at least partially defined by the duct outlet; a grille having a diffuser exit and a grille inlet upstream of the diffuser exit, wherein the grille is coupled to the duct outlet with the grille inlet facing the duct outlet and the outlet plenum; and a porous flow conditioner positioned at least partially within the outlet plenum and transverse to air flow through the quiet cabin air diffuser assembly, wherein the porous flow conditioner spans at least 50% of an open area of the outlet plenum and at least partially defines an open channel in the outlet plenum that spans at least 10% of the open area of the outlet plenum; wherein the porous flow conditioner is configured to create backpressure in the duct and to reduce a velocity of air flowing out of the porous flow conditioner toward the diffuser exit relative to a velocity of air flow unaffected by the porous flow conditioner, and wherein the porous flow conditioner is configured to reduce noise generated by air flow through the quiet cabin air diffuser assembly relative to noise generated by air flow unaffected by the porous flow conditioner.