Variable chiller exhaust with crown ventilation
AssigneeThe Boeing Company
InventorsEric A. Hill, Brian C. Christenson, John C. Pizzichemi
Life of this patent
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Abstract
A variable chiller exhaust system incorporate a plurality of chillers, each driller having an inlet receiving air from a crown in an aircraft fuselage and an outlet connected to a manifold. A plurality of check valves are connected to the manifold and configured to maintain a differential back pressure on the plurality of chillers of 2″ water pressure or less. The check valves vent into the crown. An exhaust conduit is connected to direct air from the manifold to a variable speed fan. An outflow valve exhausts air from the variable speed fan to an exterior of the fuselage.
Claims20
A method for crown temperature control comprising:
- monitoring a status of an aircraft;
- issuing a maximum proportional output signal from a controller to a variable speed fan responsive to an “on ground” status;
- exhausting a chiller process air output stream from a manifold to the variable speed fan and through an outflow valve to an exterior of a fuselage of the aircraft, wherein the manifold is connected to a plurality of chillers associated with a plurality of galleys;
- issuing a minimum proportional output signal from the controller to the variable speed fan responsive to an “in cruise” status;
- and
- venting substantially all of the chiller process air output stream through a plurality of check valves into a crown of the fuselage.
A method for crown temperature control comprising:
- monitoring a status of an aircraft;
- issuing a maximum proportional output signal from a controller to a variable speed fan responsive to an “on ground” status;
- monitoring temperature and pressure sensors responsive to an “in climb” status or an “in descent” status;
- issuing a proportional output signal from the controller to the variable speed fan to maintain a predetermined temperature profile in the crown;
- exhausting a chiller process air output stream from a manifold to the variable speed fan and through an outflow valve to an exterior of a fuselage of the aircraft, wherein the manifold is connected to a plurality of chillers associated with a plurality of galleys;
- issuing a minimum proportional output signal from the controller to the variable speed fan responsive to an “in cruise” status;
- venting substantially all of the chiller process air output stream through a plurality of check valves into a crown of the fuselage;
- and
- increasing a proportional output signal from the controller to increase flow through the variable speed fan responsive to the temperature sensors indicating higher crown temperatures than a predetermined maximum.
Dependencies are inferred from the claim text.