Low sound emission flow diffusor as well as air conditioning system comprising the same

A low sound emission flow diffuser for an air conditioning system of a motor vehicle, the low sound flow diffuser comprising:

• a diffuser housing, which limits or forms an installation space, through which a flow path for an air flow of air extends, starting at an inlet opening, which is limited or formed by the diffuser housing on its inflow side, to an outlet opening, which is limited or formed by the diffuser housing on its outflow side,
• wherein the flow diffuser has a flow manipulator, which extends along the flow path between the inlet opening and the outlet opening, for absorbing airborne sound, the flow manipulator comprises an air inlet (12) that receives air flowing from the inlet opening of the diffuser housing, a guide vane, and a pressure diaphragm (14),
• wherein the guide vane is configured to promote laminar flow, wherein the guide vane is curved along its length to urge air flowing therepast to curve in a direction similar to the curve of the guide vane, wherein a first plane that is perpendicular to a direction of air flowing into the inlet opening is at an acute angle with respect to a second plane that is perpendicular to a direction of air flowing out of the inlet opening, wherein a first portion of the guide vane proximate to the inlet opening is disposed parallel to the direction of air flowing into the inlet opening and a second portion of the guide vane proximate to the outlet opening is disposed parallel to the direction of air flowing out of the outlet opening,
• wherein the pressure diaphragm is disposed at a ninety degree angle with respect to the guide vane where the pressure diaphragm crosses the guide vane, wherein the pressure diaphragm comprises an aperture through which air can flow.