Hypoxic aircraft fire prevention system with advanced hypoxic generator

摘要

An aircraft fire prevention system provides oxygen depleted (hypoxic) air for the fuel tank and/or cargo compartment protection; the system does not employ compressed air for the production of hypoxic air, which allows to save energy and fuel and to reduce negative impact on the earth atmosphere.

主权项

1. A system for providing fire prevention for a fuel tank on an aircraft by using cabin air for producing oxygen-depleted (hypoxic) air from the cabin air, said system comprising:
an air-separation device having an inlet and first and second outlets; said air-separation device employing a first pressure difference between said inlet and said first outlet, and a second pressure difference between said inlet and said second outlet; said first pressure difference and said second pressure difference providing a driving force for separating said cabin air into oxygen-enriched and oxygen-depleted gas mixtures without preliminary compression; said inlet communicating with an interior atmosphere of the aircraft, said first outlet communicating with one of a fuel tank or a cargo compartment, and said second outlet communicating with the atmosphere outside of the said aircraft; said inlet receiving said cabin air and said first outlet transmitting an oxygen-reduced gas mixture and said second outlet transmitting an oxygen-enriched gas mixture; said oxygen-enriched gas mixture being normally vented outside the aircraft; and said oxygen-reduced gas mixture, when in use, being supplied into said fuel tank for maintaining therein a hypoxic environment in order to prevent fuel ignition or explosion; wherein an oxygen content in said oxygen-reduced gas mixture is maintained in a range from 9% to 15%.