Aircraft Oxygen Redundancy via Segmented Group Lines
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Solution Overview
Problem
Current aircraft oxygen supply systems face redundancy issues, particularly in regions where damage is more likely, leading to incomplete passenger oxygen supply due to the need for shared masks or extensive pipeline closure during malfunctions.
Innovation Solution
A redundant gas supply system with two main lines, a group supply line, and connecting lines, incorporating flow monitoring and nonreturn valve devices to ensure continuous oxygen supply to multiple consumers without active alternative setups, and to prevent excessive oxygen loss in case of leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two main pipelines are arranged in ceiling and subfloor regions to supply oxygen to alternate seat rows, then redundancy is improved, but device complexity increases and requires alternating shared mask usage or additional masks per row
Solution Approach 1:
The system divides the aircraft cabin into multiple groups, with each group supplied by a dedicated group supply line. Each group supply line is connected to both main pipelines through connecting lines, creating segmented zones that can be independently managed. This segmentation allows any damaged section to be isolated without affecting the entire system.
Solution Approach 2:
Group supply lines act as intermediary elements between the main pipelines and the oxygen distribution network. These intermediaries connect both main pipelines to multiple consumers, enabling flexible routing and isolation of damaged sections while maintaining supply to unaffected areas.
2Loss of energy
If a relatively long section of main pipeline is closed during malfunction to protect the system, then oxygen loss is prevented, but the number of seats that can no longer be supplied increases
Solution Approach 1:
The aircraft oxygen system is divided into multiple groups, each with its own group supply line. When damage occurs, only the specific group supply line affected by the malfunction needs to be closed, rather than a long section of the main pipeline. This segmentation isolates the damage to a minimal area while maintaining supply to all other groups.
Solution Approach 2:
Each group supply line is equipped with its own shut-off valve, enabling localized control of oxygen flow. This allows the system to close only the specific local section where damage has occurred, rather than having to close a large portion of the main pipeline, thereby minimizing the impact on overall oxygen supply capability.
3Reliability
If passengers use oxygen masks in shared alternating arrangement during line failure, then oxygen supply is maintained, but ease of operation deteriorates due to mask sharing requirements
Solution Approach 1:
The system divides passengers into multiple groups, with each group having dedicated oxygen supply capability through its own group supply line. This segmentation ensures that even if one main pipeline fails, each group can independently receive oxygen without requiring shared mask arrangements between groups.
Solution Approach 2:
The redundant connection of each group supply line to both main pipelines provides advance preparation for potential failures. This prior cushioning ensures that oxygen supply capability is already in place for each group before any malfunction occurs, eliminating the need for improvised mask-sharing arrangements during emergencies.
Data Source
AI summary
A redundant gas supply or oxygen supply for an aircraft comprising two main lines and a group supply line that is connected to one consumer or to a multitude of consumers. In each case a connecting line connects the respective one main line to the group supply line. Flow limiters and nonreturn valves can be provided in the connecting lines.