Cabin air compressor cooling system

Details Cabin air compressor cooling system Cabin air compressor cooling system

2007-12-04

2007-12-04

Jones, Melvin (Department: 3744)

Refrigeration

Processes

Reducing pressure on compressed gas

C062S401000

Reexamination Certificate

active

10818805

ABSTRACT:
A closed loop cooling system and method for an oil-free electric motor of an aircraft cabin air compressor. A closed-loop fan, which may be coupled to a motor rotor opposite a compressor impeller, circulates the required cooling air in a closed loop through a motor stator and bearings, a motor cooler, and a ducting used to complete the flow circuit via a ram air cooled heat exchanger. The cooling air may be pressurized to cabin pressure. The system and method of the present invention eliminates the possibility of contaminating trace amounts of oil in cabin supply air.

REFERENCES:
patent: 4487034 (1984-12-01), Cronin et al.
patent: 5844333 (1998-12-01), Sheerin
patent: 5884498 (1999-03-01), Kishimoto et al.
patent: 6499532 (2002-12-01), Williams
patent: 6832644 (2004-12-01), Stauder et al.
patent: 2004/0005228 (2004-01-01), Agriwal et al.

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