Aircraft Oxygen Mask Activation With Decentralized Flow Control
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Solution Overview
Problem
Current emergency oxygen systems in aircraft face challenges such as complexity, high power demand, electromagnetic interference, maintenance intensity, and difficulty in activating multiple face masks with a single motion, which increases installation costs and risks.
Innovation Solution
A decentralized system with a control unit integrated into each face mask, activated by a single pulling motion, eliminating the need for complex wiring and reducing power requirements, while ensuring electromagnetic compatibility and compliance with aviation regulations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single central control system is used to control multiple face masks, then the system can be activated with a single motion, but the system complexity increases and the risk of multiple failures increases
Solution Approach 1:
The patent divides the single central control system into multiple independent control units, each integrated into a separate face mask. This segmentation allows each mask to function independently, eliminating the risk that a single control failure will disable all masks, while still maintaining simple activation through individual mask deployment
2Quantity of substance
If a single central control system with multiple valves is used, then multiple passengers can be served, but the power requirement increases necessitating connection to aircraft power supply
Solution Approach 1:
The patent segments the power consumption by providing each face mask with its own control unit and power source (battery). This eliminates the need for a high-power central system connected to aircraft power supply, as each mask operates independently with low power requirements suitable for battery operation
3Reliability
If sensors are connected to central control system by long wires, then breathing characteristics can be monitored, but electromagnetic interference with other aircraft systems occurs
Solution Approach 1:
The patent extracts the control unit and sensors from the central control system and integrates them directly into each face mask. This eliminates the long connecting wires that act as aerials, thereby removing the source of electromagnetic interference while preserving the breathing monitoring function within each mask
4Reliability
If complex redundant control systems are installed, then multiple fatalities can be avoided, but maintenance intensity increases and system becomes harder to install
Solution Approach 1:
The patent segments the safety function into multiple independent control units distributed across different face masks. This modular approach maintains safety through redundancy while simplifying installation, as each self-contained mask unit can be independently installed without complex system integration
Solution Approach 2:
Each face mask with its integrated control unit operates as a self-service module, requiring minimal integration with aircraft systems. This self-contained design reduces maintenance intensity and simplifies both initial installation and subsequent servicing
Data Source
AI summary
A system for supplying a breathable gas to a user comprises: at least one face mask comprising: a gas feed tube for connection to a vessel containing a supply of breathable gas; and a control system for controlling a flow of the breathable gas from the vessel when the gas feed tube is connected thereto and the control system is in an operative condition; a holder for holding the at least one face mask in a location in space while the control system is in a non-operative condition; and an activation device responsive to displacement of the at least one face mask away from the location in space, so as to activate the flow of the breathable gas from the vessel and to activate the operative condition of the control system, thereby to activate a controllable flow of the breathable gas to the user.