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In an emergency oxygen supply system of an aircraft equipped with a pressurized cabin, breathable gas is supplied by a gas generator (1) for generating an oxygen-enriched gas either from the ambient air, or from air tapped from the engine, or from fresh water. The generator may also generate practic

In an emergency oxygen supply system of an aircraft equipped with a pressurized cabin, breathable gas is supplied by a gas generator (1) for generating an oxygen-enriched gas either from the ambient air, or from air tapped from the engine, or from fresh water. The generator may also generate practically pure oxygen. A mixed gas is produced in a mixing unit (14) from the breathable gas and oxygen as needed especially in short duration transition periods to meet official regulations. The oxygen partial pressure in the mixed gas is varied or controlled depending on the cabin pressure. The breathable gas is fed in a constant mass flow through an on-board distribution network to the breathing masks connected to the network. Selectable masks for the crew may receive pure oxygen while most other masks for the passengers receive mixed gas having an adequate oxygen content.

대표청구항 ▼

[ What is claimed is:] [1.] A method for supplying an oxygen-enriched gas through a distribution system to breathing masks in a cabin of an aircraft, comprising the following steps:(a) sensing a cabin pressure to provide a cabin pressure representing first control signal,(b) providing a breathable g

[ What is claimed is:] [1.] A method for supplying an oxygen-enriched gas through a distribution system to breathing masks in a cabin of an aircraft, comprising the following steps:(a) sensing a cabin pressure to provide a cabin pressure representing first control signal,(b) providing a breathable gas in response to said first control signal,(c) mixing said breathable gas with oxygen to produce a mixed oxygen-enriched gas,(d) ascertaining a second control signal representing an actual oxygen partial pressure of said mixed oxygen-enriched gas,(e) controlling said mixing step in response to said second control signal representing said actual oxygen partial pressure of said mixed oxygen-enriched gas to provide said mixed gas with a required or rated oxygen content, and(f) feeding said mixed gas having said required or rated oxygen content to said breathing masks with a constant mass flow.