Roof Window Pane Extension for Weatherproof Seam Concealment
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Solution Overview
Problem
Existing roof windows face challenges in achieving optimal performance in terms of tightness, insulation, and aesthetic appeal while maintaining cost-effectiveness and ease of installation, with existing solutions often compromising on one or more of these parameters.
Innovation Solution
The roof window design incorporates an exterior sheet with an extended portion that overlaps the bottom sash covering, featuring a masking to conceal it and enhance insulation, while also providing weather protection and improved drainage, with additional seals and masking on interior or exterior faces to ensure tightness and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bottom sash covering is used to protect the sash, then weatherproofing is improved, but the aesthetic appearance deteriorates due to visible seams and fastening means
Solution Approach 1:
The extended portion of the exterior sheet acts as an intermediary element that visually conceals the bottom sash covering and its fastening means. This intermediate layer maintains the protective function of the sash covering while eliminating its visual impact on the aesthetic appearance of the roof window.
Solution Approach 2:
The extended portion of the exterior sheet is designed to match the visual characteristics of the pane element, creating a continuous visual appearance. This color and texture matching technique allows the extended portion to blend seamlessly with the surrounding glass surfaces, hiding the transition zone and fastening elements.
2Reliability
If the bottom sash covering extends over the pane element, then tightness is improved, but the manufacturing cost increases due to additional materials and assembly steps
Solution Approach 1:
The extended portion of the exterior sheet serves multiple functions simultaneously: it maintains the weatherproofing function of the bottom sash covering, provides visual concealment of fastening means, and creates a continuous aesthetic appearance. This multi-functionality eliminates the need for separate components, thereby reducing manufacturing costs despite the extended coverage.
3Shape
If the extended portion of the exterior sheet is used to conceal the bottom sash covering, then aesthetic appearance is improved, but the insulation properties worsen due to increased heat transfer areas
Solution Approach 1:
The extended portion of the exterior sheet is specifically designed with localized insulation measures at the transition zone between the pane element and the bottom sash covering. This targeted approach addresses the insulation concern only where it is most critical, without requiring insulation improvements across the entire extended surface area.
Data Source
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AI summary
In the roof window (10), the exterior sheet (43) of the pane element (40) has an extended portion (43b) which overlaps the bottom sash covering (15). This provides for improved insulation and a visually appealing transition to the roof surface without compromising the tightness of the roof window. Improved protection is obtained by a masking (60) in the extended portion (43b), positioned either on the exterior or the interior face of the exterior sheet (43).