Composite Window Frame Thermal Break Design
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Solution Overview
Problem
Existing window structures, particularly those made from metal, face challenges in efficiently controlling heat transfer, which affects the energy efficiency of buildings, and there is a need for improved methods to reduce thermal conductivity while maintaining structural integrity and modularity.
Innovation Solution
A composite window frame structure combining metal and non-metallic components, where the non-metallic portion has a lower thermal conductivity than the metal portion, is used to create a vent surround and frame assembly that can be assembled modularly, incorporating a polymer ledge with a unique cross-sectional shape and snap-fitting mechanism to reduce airflow and enhance water runoff, and featuring a bifurcated arrowhead connection for improved sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal is used for window frames and surrounds, then structural strength and rigidity are improved, but thermal conductivity increases leading to higher energy transfer
Solution Approach 1:
The patent applies composite materials by combining metal components (for structural strength) with non-metallic thermal break components (for thermal insulation). The frame assembly includes metal frame members connected to non-metallic ledge portions and surround members, creating a composite structure that achieves both structural integrity and reduced thermal conductivity. This composite approach resolves the contradiction by allowing each material to perform its optimal function.
Solution Approach 2:
The non-metallic thermal break components serve as intermediary elements between the metal frame members and the building envelope. These intermediary components interrupt the thermal pathway while maintaining structural connectivity, allowing the metal structure to remain strong while preventing direct heat transfer through the frame assembly.
2Loss of energy
If composite structures with multiple components are used, then thermal insulation is improved, but device complexity increases
Solution Approach 1:
The frame assembly is segmented into distinct functional components: metal frame members providing structural support, non-metallic ledge portions providing thermal breaks at the building envelope interface, and surround members framing the opening. This segmentation allows each component to be optimized for its specific function while maintaining overall system performance.
Solution Approach 2:
The patent merges multiple components into an integrated frame assembly where the metal frame members, non-metallic ledge portions, and surround members work together as a unified system. The components are designed to connect through standardized interfaces, reducing assembly complexity despite the multi-component construction.
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 composite structure effectively reduces heat transfer across the window, enhances energy efficiency, and allows for modular applications, improving both thermal performance and weather sealing while maintaining structural rigidity and versatility.
Implementation Method 1
the non-metallic portion having a lower thermal conductivity than the metal portion
Data Source
AI summary
A manufacture for reducing thermal transfer through windows has a composite metal/nonmetallic frame and/or a composite vent surround. The metallic and non-metallic components are modular and selectively coupled, such that a range of variations to accommodate different applications may be inter-coupled via common interfaces.