Fire Door Sash Frame Using Non-Separated Profile
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Solution Overview
Problem
Existing fire protection doors and windows with thermally separated profiles are prone to the bimetallic effect, leading to potential leaks and flame penetration, which are costly and complex to address with multiple locking mechanisms and insulation profiles.
Innovation Solution
Designing fire protection doors and windows with at least one vertical wing frame strut made from a non-thermally separated metal or metal alloy profile, eliminating thermal separation to prevent the bimetallic effect and simplifying the construction, thereby reducing costs and complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If thermally separated profiles with insulating webs are used in fire protection doors, then thermal insulation performance is improved, but the bimetallic effect causes warping leading to leaks and flame penetration
Solution Approach 1:
The patent applies different thermal separation strategies to different parts of the door structure. The frame members (vertical and horizontal) use thermally separated composite profiles with insulating webs to prevent heat transfer, while the sash frame members use thermally non-separated profiles to avoid the bimetallic effect. This local differentiation allows each component to optimize for its specific functional requirements.
2Reliability
If multiple locking mechanisms are used to prevent warping in fire-resistant constructions, then warping resistance is improved, but device complexity and cost increase
Solution Approach 1:
The patent extracts and eliminates the need for complex multiple locking mechanisms by using thermally non-separated profiles in the sash frame. The warping resistance is achieved through the profile design itself rather than through additional locking components, thereby removing unnecessary complexity while maintaining reliability.
3Reliability
If fire protection materials with endothermic reaction are used in chambers, then fire resistance is improved, but device complexity and cost increase
Solution Approach 1:
The patent merges the fire protection function directly into the profile structure itself. The thermally non-separated sash frame members provide fire resistance through their monolithic construction that prevents the bimetallic effect, eliminating the need for separate fire protection materials and chambers. This integration simplifies the overall construction while maintaining fire resistance.
4Reliability
If thermally non-separated profiles are used in sash frame, then bimetallic effect is avoided, but thermal insulation performance decreases
Solution Approach 1:
The patent applies different thermal separation strategies to different parts of the door structure. The frame members (vertical and horizontal) use thermally separated composite profiles with insulating webs to prevent heat transfer, while the sash frame members use thermally non-separated profiles to avoid the bimetallic effect. This local differentiation allows each component to optimize for its specific functional requirements.
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 approach effectively avoids the bimetallic effect, ensuring fire protection compliance (T-30 standard) while offering a significant cost advantage by eliminating the need for expensive multiple locks and complex installations, maintaining effective fire resistance without thermal separation.
Implementation Method 1
A disadvantage of such composite profiles is that they warp when exposed to different temperatures on the inside and outside of a component constructed from them, for example, a door. This phenomenon is commonly referred to as the bimetallic effect.
Implementation Method 2
fire protection materials are used in the chambers between the elements (frame/sash frame) which react with an endothermic reaction or foam up when exposed to a corresponding temperature, thus preventing hot gases or flames from penetrating the chambers
Data Source
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AI summary
A door (1a, 1b) or window with fire-resistant properties, wherein the door (1a, 1b) or window has a frame (3a, 3b) and a sash (2), wherein the sash (2) is constructed from sash frame mullions (6, 7, 8, 9) and the sash frame mullions (6, 7, 8, 9) are each made from a section of a profile, and wherein the frame (3a, 3b) is constructed from frame mullions (12a, 12b, 13a, 13b, 14a, 14b) and the frame mullions (12a, 12b, 13a, 13b, 14a, 14b) are each made from a section of a composite profile (5a, 5b), wherein a rebate (23) is formed on the sash (2) into which a panel (20) can be inserted, is characterized in that at least one of the vertical wing frame members (6, 7) are made from a thermally non-separated profile (4).