Air distribution system for small commercial airplane

Abstract

An air distribution system for an aircraft that has a simplified construction that saves space in the aircraft, reduces the weight of the air distribution system from that of currently employed air distribution systems, handles the mixing of interior aircraft cabin air with exterior fresh air and the drainage of moisture from the air, and improves aircraft cabin air quality. The system employs a mixing chamber having a conical configuration with an apex of the conical configuration at the bottom of the chamber and a base of the conical configuration at the top of the chamber. Inside the chamber first and second separate interior volumes separated by an interior wall of the mixing chamber wrap around each other. The interior air and exterior air are mixed as they spiral around the interior volumes and are directed toward two discharge openings from the two volumes at the top of the mixing chamber. From the discharge openings the mixed air is directed to air diffusers in the aircraft cabin. Moisture removed from the air in the mixing chamber drains downwardly through the two interior volumes to a drain opening at the bottom of the mixing chamber.