Aluminum Window Frame Thermal Insulation via Latching Inserts
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Solution Overview
Problem
Existing window and door frames made of aluminum hollow profiles face challenges in achieving optimal thermal insulation due to metallic materials being good conductors of heat, and existing solutions do not adequately address gaps and leakages that compromise insulation.
Innovation Solution
Incorporating porous, easily deformable insulation elements with latching hooks or webs on the insulating bars, which engage with a bridge insulating strip and spacer webs to ensure secure fit and minimize gaps, along with a hollow profile design for enhanced thermal performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If aluminum hollow profiles are used for window and door frames, then structural strength and durability are improved, but thermal insulation performance deteriorates due to metallic materials being good conductors of heat
Solution Approach 1:
The patent applies composite materials by combining aluminum hollow profiles with thermal insulating materials. The aluminum profile provides structural strength while the integrated thermal insulating insert (made of materials like polyamide, polyurethane, or polysulfone) provides thermal insulation. This composite structure resolves the contradiction by allowing the metal to provide mechanical support while the insulating material prevents heat conduction, achieving both strength and energy efficiency.
2Ease of manufacture
If simple insulating bars are used between aluminum profile shells, then manufacturing simplicity is maintained, but thermal insulation effectiveness deteriorates due to gaps and leakages
Solution Approach 1:
The patent employs porous thermal insulating materials (such as foam plastics or cellular structures) as thermal insulating inserts within the aluminum hollow profile. These porous materials provide excellent thermal insulation properties while being easy to manufacture and install. The porous structure traps air pockets that resist heat flow, effectively preventing thermal bridging through the metal profile while maintaining manufacturing simplicity through injection molding or insertion processes.
Solution Approach 2:
The patent changes the physical and thermal parameters of the insulating material by selecting materials with specific properties (thermal conductivity, density, porosity) optimized for thermal insulation. The thermal insulating insert is designed with parameters that maximize insulation effectiveness while fitting within the aluminum profile geometry, thereby improving thermal performance without complicating manufacturing.
3Ease of operation
If insulating elements are installed after sash frame insertion, then assembly flexibility is maintained, but installation reliability deteriorates due to risk of losing small insulating elements
Solution Approach 1:
The patent applies preliminary action by pre-installing the thermal insulating inserts into the aluminum hollow profile during the manufacturing or pre-assembly stage, before the sash frame is inserted. This ensures that the insulating elements are securely in place and cannot be lost during subsequent assembly operations. The insulating insert is integrated into the profile structure, making it a permanent part of the frame assembly and eliminating the risk of loss while maintaining assembly flexibility for the sash frame installation.
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
This configuration significantly improves thermal insulation by preventing gaps and leakages, allowing for better heat retention and energy efficiency in window and door frames.
Implementation Method 1
at least one of the insulating bars of the casement is provided with at least two latching elements, which engage in porous, easily deformable insulation elements lying against the respective insulating strip
Data Source
Figure 1
Figure 2
AI summary
The sash or blind frame has bars made of aluminum hollow profiles (10,22) formed of inner and outer shells (11,12,23,24), which are connected with each other by the insulating bars (13,14,25,26) made of a thermally insulating material. One of the insulting bars is provided with two latching elements (18,19,29,30), which engage into insulation elements (17,31) resting against the respective insulating bar.