Aircraft Window Dust Cover with Thermal Absorption
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Solution Overview
Problem
Aircraft window assemblies face challenges in providing effective protection against dust and maintaining optical clarity while allowing for electro-optic functionality and thermal management.
Innovation Solution
An aircraft window assembly incorporating a pressure pane with a bezel and electro-optic element, along with a dust cover featuring an interior and exterior substrate gap filled with a thermally absorbent material, which allows for operation between transmissive and dimmed conditions and provides thermal absorption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a dust cover is added to protect the electro-optic element, then dust protection is improved, but device complexity increases
Solution Approach 1:
The dust cover is designed to perform multiple functions simultaneously: it protects the electro-optic element from dust contamination while also serving as a thermal management system through the thermally conductive material. This multi-functionality reduces the need for separate protective components, thereby limiting the increase in device complexity.
Solution Approach 2:
The dust cover structure is integrated within the existing window assembly architecture, nesting the protective function within the bezel and panel structure. The cover is positioned to overlap with the electro-optic element and is received within the bezel, creating a nested arrangement that minimizes additional space requirements and structural complexity.
2Temperature
If a thermally absorbent material is added to the dust cover, then thermal management is improved, but device complexity increases
Solution Approach 1:
The dust cover incorporates a thermally conductive material that simultaneously provides thermal management and structural support functions. This material is disposed between the inner and outer panels of the dust cover, creating a thermal pathway that manages heat from the electro-optic element without requiring separate thermal management components.
Solution Approach 2:
The thermal management function is merged with the dust cover structure itself. The thermally conductive material is integrated into the dust cover assembly, combining the protective enclosure function with thermal conduction in a single integrated component rather than adding separate thermal management systems.
3Object-affected harmful factors
If the electro-optic element is enclosed in a dust cover, then dust protection is improved, but optical clarity may be compromised
Solution Approach 1:
The dust cover is constructed with thin, transparent panels that allow optical transmission while providing protective enclosure. The inner and outer panels are positioned to create a dust-tight seal while maintaining visibility through the window assembly, balancing protection with optical clarity.
Solution Approach 2:
The dust cover structure provides protection primarily at the edges and periphery where dust contamination is most likely to occur, while maintaining transparency in the central viewing area. The bezel and sealing structures are positioned to protect critical areas without interfering with the optical path through the electro-optic element.
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
The solution effectively protects the aircraft window assembly from dust, maintains optical clarity, and manages thermal conditions, enhancing the durability and functionality of the electro-optic element.
Implementation Method 1
A thermally absorbent liquid is disposed in the gap between the interior substrate and the exterior substrate
Implementation Method 2
An electro-optic element is disposed in the inner opening and is configured for reception in the channel of the inner wall. The electro-optic element is capable of operation between a transmissive condition and a dimmed condition
Implementation Method 3
The interior surface includes an electrophoretic deposition
Data Source
AI summary
An aircraft window assembly includes a pressure pane. A bezel is proximate a periphery of the pressure pane and defines an inner opening. The bezel includes an inner wall with a channel. An electro-optic element is disposed in the inner opening and is configured for reception in the channel of the inner wall. The electro-optic element is capable of operation between a transmissive condition and a dimmed condition. A dust cover is proximate the bezel. The dust cover includes an interior substrate and an exterior substrate. The interior substrate and the exterior substrate generally define a gap therebetween. A thermally absorbent liquid is disposed in the gap.