Composite Window Profile Cover Shields Solar Heat
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Solution Overview
Problem
Existing composite profiles for windows and doors experience thermal expansion issues due to temperature differences, leading to bulging and instability, which complicates processing and maintenance, and existing solutions either require special insulating bars or are not suitable for retrofitting.
Innovation Solution
A composite profile design featuring a cover profile with a surface element extending in the longitudinal direction, spaced from the outer profile, and connected via a flexible connection, which shields solar radiation and allows for thermal expansion without affecting the outer profile, and optionally includes a heat-reflecting coating and ribs for enhanced insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the outer profile and inner profile are firmly connected via shear-resistant bond, then structural strength is improved, but thermal expansion causes bulging and deflection
Solution Approach 1:
The connection between outer profile and inner profile is segmented into multiple discrete fastening points rather than a continuous shear-resistant bond. This allows the profile to expand thermally in a controlled manner at specific locations while maintaining overall structural integrity, preventing bulging and deflection caused by uniform thermal expansion constraints.
Solution Approach 2:
The connection system transitions from a static, rigid shear-resistant bond to a dynamic arrangement that accommodates thermal movement. The spaced fastenings allow the profile halves to move relative to each other during thermal expansion, enabling the structure to adapt to temperature changes without compromising strength or stability.
2Loss of energy
If insulating bars are used to thermally separate profile halves, then thermal insulation is improved, but shear stress absorption capability deteriorates
Solution Approach 1:
The insulating bars are positioned at discrete intervals rather than forming a continuous barrier. This segmentation allows the insulating elements to provide thermal separation and reduce heat transfer while permitting the profile halves to accommodate shear stresses and thermal expansions at the spaced connection points, maintaining both insulation and structural capability.
3Ease of operation
If a sliding insulating strip is used to connect profile halves, then ease of thermal expansion is improved, but manufacturing precision and stability deteriorate
Solution Approach 1:
The profile halves are pre-assembled with insulating bars positioned at predetermined locations during manufacturing, establishing precise alignment and spacing before the profile is put into service. This preliminary positioning ensures manufacturing precision is maintained while still allowing thermal expansion freedom during operation, as the bars are designed to accommodate movement within predetermined tolerances.
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
Effectively reduces thermal bulging and instability, allowing for easier processing and retrofitting, while maintaining thermal insulation and preventing shear stress-induced deflections, thus enhancing the functionality and longevity of window or door frames.
Implementation Method 1
a cover profile (6) connected or connectable to the outer profile (2), which has a surface element (7) extending at least in regions in the longitudinal direction of the outer profile (2) and is spaced from the outer profile (2)
Implementation Method 2
the two profile halves (outer profile and inner profile) connected to one another via insulating bars
Implementation Method 3
the two profile halves (outer profile and inner profile) connected to one another via insulating bars can heat up differently during normal use, as a result of which these individual profile halves expand differently
Data Source
Figure 1a
Figure 1b
Figure 1c
AI summary
The invention relates to a composite profile (1) for windows, doors, or the like, comprising an outer profile (2), an inner profile (3), and at least one insulating web (4, 5) by which the outer profile (2) and the inner profile (3) are joined. To prevent the bimetallic effect, a cover profile (6) is provided, which is connected or connectable to the outer profile (2). This cover profile has a surface element (7) extending at least partially in the longitudinal direction of the outer profile (2) and spaced apart from the outer profile (2), wherein the surface element (7) has an inner surface (8) pointing towards the outer profile (2) and spaced apart from the outer profile (2).