Cooling air arrangement for a heat exchanger of an aircraft...

Details Cooling air arrangement for a heat exchanger of an aircraft... Cooling air arrangement for a heat exchanger of an aircraft...

B - Operations, Transporting

64

D

B64D 13/08 (2006.01) B64D 13/00 (2006.01)

Patent

CA 2342682

A cooling air arrangement for an aircraft air conditioning unit includes an air inlet, a heat exchanger, an outlet plenum, first and second air outlet channels branching from the plenum, and a fan arranged in the first outlet channel. During flight of the aircraft, external ram air driven into the air inlet flows primarily through the second outlet channel. During ground operation, the fan primarily sucks cooling air through the first outlet channel, which merges back into the second outlet channel at an air mixing junction that functions as an injector nozzle and a non-return flap valve. The first outlet channel is provided in a spiral housing of the fan, or in a smooth curved duct. The air inlet and outlet of the cooling air arrangement, and the air outlet of the air cycle machine, are oriented in the same direction, e.g. the flight forward direction.

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