Aircraft Environmental Control Decompression Panel Aperture Arrays
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Solution Overview
Problem
Existing environmental control systems in aircraft passenger cabins suffer from uneven airflow distribution, leading to cross-aisle airflow that exposes passengers to more air from adjacent aisles, increasing the spread of contaminants and noise, and creating stagnant zones.
Innovation Solution
The system employs decompression panel assemblies with interchangeable inserts that adjust airflow restrictions based on location and proximity to components, ensuring similar mass flow through each aisle to minimize cross-circulation, using arrays of apertures that vary in number and configuration to match the suction force at each location.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If identical return air grills are used in all aisles, then manufacturing simplicity is improved, but uneven airflow distribution and cross-aisle airflow increase
Solution Approach 1:
The patent applies local quality by configuring return air grills with different airflow restrictions based on their specific location in the aircraft cabin. Aisles closer to environmental control system components have grills with higher airflow restrictions, while distant aisles have grills with lower restrictions. This location-specific differentiation ensures uniform air draw across all aisles, eliminating cross-aisle airflow while maintaining manufacturing simplicity through standardized grill designs adapted to local conditions.
2Device complexity
If return air grills have similar flow restriction, then device complexity is reduced, but cross-aisle airflow and contaminant spread increase
Solution Approach 1:
The patent implements local quality by tailoring the airflow restriction of each return air grill to its specific location relative to environmental control system components. This location-based differentiation creates balanced air draw across all aisles, preventing cross-aisle airflow that would otherwise transport contaminants between passengers. The solution maintains relatively simple device complexity by using standardized grill configurations with adjusted restrictions rather than completely different grill designs.
3Adaptability or versatility
If components are positioned at various locations, then system versatility is improved, but uneven air draw and stagnant zones are created
Solution Approach 1:
The patent resolves the contradiction between component placement flexibility and airflow uniformity by applying local quality principles. Each return air grill's airflow restriction is specifically configured based on its aisle's distance from environmental control system components. This location-adaptive approach allows components to be positioned at various locations for system versatility while ensuring that each aisle receives balanced air draw, eliminating stagnant zones and maintaining uniform airflow distribution throughout the cabin.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This configuration reduces cross-aisle airflow, limits the spread of airborne contaminants, decreases noise, and prevents the formation of stagnant zones by ensuring each aisle receives air primarily from its own section, enhancing passenger comfort and air quality.
Implementation Method 1
a first decompression panel assembly comprised in the first row of the aircraft and comprising a first array of apertures that defines a first airflow restriction, a second decompression panel assembly comprised in the second row of the aircraft and comprising a second array of apertures that defines a second airflow restriction different than the first airflow restriction
Data Source
Figure 1
Figure 2
Figure 3A~3B
AI summary
An environmental control system (102) for use in an aircraft includes at least one component (122) positioned along a length of the aircraft and a decompression panel (120) assembly comprising an array of apertures. The array of apertures is based on a location of the decompression panel (120) assembly along the length of the aircraft relative to the at least one component (122).