Compact Aircraft Galley Plumbing System with Modular Valves
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Solution Overview
Problem
Aircraft galley plumbing systems face challenges in efficiently managing potable and waste water, including cross-contamination prevention, automatic filling and draining, and adaptability to changing regulations, while minimizing weight and cost.
Innovation Solution
The implementation of a compact, integrated plumbing system using non-metallic modular components, special control valves, and strategic component placement, along with self-venting and self-draining features, allows for multiple potable water supply and drainage options and efficient reconfiguration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If a traditional aircraft galley plumbing system is used, then it can provide complete potable and waste water management, but it occupies large space and has high weight
Solution Approach 1:
The plumbing system is divided into modular components including separate potable water tank, waste water tank, pump assembly, and valve units that can be independently installed and maintained. This segmentation reduces overall system weight while maintaining complete functionality for both potable and waste water management.
Solution Approach 2:
The pump assembly serves multiple functions: it can pump potable water from the potable tank to the galley, pump waste water from the waste tank, and perform system draining operations. This multi-functionality eliminates the need for separate pumps for different water streams, reducing system weight and complexity.
2Reliability
If comprehensive water management systems are installed, then water safety and contamination prevention are improved, but system cost increases
Solution Approach 1:
A check valve is positioned between the potable water tank and the pump assembly to prevent backflow of waste water or contaminated water into the potable water system. This simple intermediary component ensures water safety at minimal cost, preventing cross-contamination without requiring complex active control systems.
Solution Approach 2:
The system extracts and separates waste water collection from the potable water supply system, with dedicated waste water tanks and separate drainage pathways. This extraction ensures that potable water safety is maintained independently from waste water management, reducing the need for expensive complex integration while maintaining high reliability.
3Productivity
If manual filling procedures are used for potable water tanks, then system simplicity is maintained, but time consumption and labor requirements increase
Solution Approach 1:
The pump assembly is configured to automatically draw potable water from the potable water tank and supply it to the galley water outlets without requiring manual intervention. The system self-regulates water delivery based on demand, eliminating the need for manual filling operations and significantly improving productivity during galley operations.
4Object-affected harmful factors
If complete drainage capability is implemented, then contamination prevention is improved, but system complexity increases
Solution Approach 1:
Instead of using complex active pumping systems to force water out during drainage, the system uses gravity-assisted drainage where tanks are positioned to allow complete gravitational drainage. The pump assembly reverses its normal function to draw remaining water out, and check valves passively prevent backflow during drainage, achieving complete contamination prevention through inverted operational sequences rather than complex active control.
Data Source
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AI summary
An aircraft galley plumbing system is disclosed comprising water distribution components and assemblies to allow installation in a wet/refrigerated reduced foot print galley. The system includes a single potable water distribution manifold (28) with quick disconnect couplings (30) for the GAINS and built in air bleed devices (34) facilitating rapid drainage and easy installation. The system also includes a compact pressure check valve (26) to control filling operation and drain down of the potable water system. The use of a compact air stop valve (46) and integrated master distribution block (16) and water filter system (18a, 18b) further enhance the system.