The Boeing Company

Gregg Grant LaVoy

Casey Y K Ng

Warren Andrew Atkey

Leigh M Sedgwick

Casey YK Ng

A ventilation system, aircraft, and method. The ventilation system includes a first conduit in fluid communication with a first air source in the aircraft to direct a fluid flow from the first air source. The ventilation system also includes a first branch in fluid communication with the first conduit and a first outflow point, the first branch including an active air mover to move the fluid flow toward the first outflow point. The ventilation system further includes a second branch that is separate from the first branch and in fluid communication with the first conduit and a second outflow point, the second branch including a passive air mover to move the fluid flow to toward the second outflow point.

Split ventilation systems

An air conditioning system and method are provided for use in an aircraft having a pressurized area and an unpressurized area. The air conditioning system includes an air conditioning pack located in the unpressurized area of the aircraft that conditions fresh air. The air conditioning system also includes a first air duct for directing a flow of recirculation air from the pressurized area, through a pressure bulkhead, and into the unpressurized area. A mixer is also provided and advantageously positioned in the unpressurized area for mixing the conditioned air from the air conditioning pack and the recirculation air from the pressurized area. Advantageously, the mixer obviates the need for a mix manifold and saves valuable space for passengers, cargo, and other aircraft equipment. The air conditioning system also includes a second air duct that directs the mixture of conditioned air and recirculation air from the mixer to the pressurized area of the aircraft. The air conditioning unit also includes an aerodynamic shutoff valve in line with the first air duct at the pressure bulkhead and adapted for protecting against depressurization of the pressurized area as a result of the depressurization of the first air duct.

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Kirkland, WA, United States of America

Gregg Grant LaVoy