Window Cavity Profile Thermal Break Design
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Solution Overview
Problem
Existing window and door profiles with metallic reinforcing elements suffer from poor thermal insulation due to the high thermal conductivity of metals, leading to increased heat transfer and reduced insulating effectiveness.
Innovation Solution
A hollow chamber profile design featuring a reinforcing chamber surrounded by a 'thermal jacket' of parallel profile webs on three sides, which maintains a clear distance to reduce convection and includes projections and angled intermediate webs for enhanced insulation and stability, along with screw chambers for improved fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a metallic reinforcement element is inserted into the reinforcement chamber, then the structural stability and strength of the profile is improved, but the thermal insulation performance deteriorates due to high thermal conductivity of metal
Solution Approach 1:
A thermal break element made of insulating material is introduced as an intermediary between the metallic reinforcement and the profile walls. This thermal break extends through the entire thickness of the reinforcement chamber, preventing direct thermal contact between the metal and the profile structure, thereby maintaining structural strength while restoring thermal insulation performance
Solution Approach 2:
The reinforcement chamber is segmented into multiple sections by the thermal break element, dividing the continuous metal reinforcement into isolated segments. This segmentation interrupts the thermal pathway while preserving the mechanical reinforcement function, as each segment remains structurally supported but thermally isolated
2Strength
If the reinforcement chamber is made large to accommodate metallic reinforcement, then the structural strength is improved, but the thermal insulation effectiveness is reduced due to increased heat transfer area
Solution Approach 1:
The thermal break element acts as a mediating barrier throughout the entire reinforcement chamber volume, preventing heat transfer across the large chamber area. The thermal break's insulating properties compensate for the increased heat transfer area by providing a continuous thermal barrier that spans the entire reinforcement zone
3Ease of manufacture
If the profile web is directly supported on the outer lateral profile wall by lateral webs, then the manufacturing simplicity is improved, but the thermal insulation performance deteriorates due to direct thermal contact
Solution Approach 1:
The thermal break element serves as an intermediary between the profile web and the outer lateral profile wall, eliminating direct thermal contact. The thermal break extends to the profile walls, ensuring that even where structural support is needed, thermal insulation is maintained through the insulating barrier
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 design achieves improved thermal insulation by minimizing heat transfer across the reinforcement chamber, maintaining a temperature difference of over 2°C and enhancing the holding effect of fasteners, while maintaining structural stability and reducing material usage.
Implementation Method 1
maintains a clear distance to reduce convection
Implementation Method 2
Metals have high thermal conductivity. Therefore, the reinforcements lead to a deterioration of the thermal insulation within the structure.
Data Source
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AI summary
A window or door hollow chamber profile (1) is proposed, which hollow chamber profile (1) has at least one reinforcement chamber (4) designed and provided for receiving a preferably metallic reinforcement element (2), wherein the reinforcement chamber (4) is formed on at least two sides, preferably on three sides, by an arrangement of at least two profile webs (1a, 6; 7.1, 7.2; 8.1, 8.2) extending at a clear distance (A1-A3) and parallel to each other. This results in improved thermal insulation in the area of the reinforcement chamber.