Fire Door Thermal Bridge Reduction via Intermediate Member
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Solution Overview
Problem
Fire doors lack adequate heat shielding performance, leading to potential fire spread due to low thermal resistance between components, as existing designs often rely on direct coupling members that act as thermal bridges.
Innovation Solution
A fire door configuration featuring a first and second plate member, an intermediate member, and heat insulating materials with coupling members that extend through these materials, arranged to avoid direct contact and thermal bridges, ensuring high thermal resistance and effective heat shielding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a direct coupling member is used to couple the first plate member and the second plate member, then the structural strength is improved, but the thermal resistance decreases due to formation of thermal bridges
Solution Approach 1:
An intermediate member is introduced between the first plate member and the second plate member to serve as a mediator for coupling. This intermediate member has lower thermal conductivity than the plate members, allowing structural coupling while maintaining thermal resistance and preventing direct thermal bridge formation between the fire-exposed and non-fire-exposed sides.
Solution Approach 2:
The coupling structure is segmented into multiple components: the first plate member, the intermediate member, and the second plate member. This segmentation breaks the direct thermal path that would exist with a single coupling member, creating thermal barriers at each interface while maintaining structural integrity through the assembled components.
2Device complexity
If the first plate member and the second plate member are placed in direct contact, then the device complexity is reduced, but the heat shielding performance deteriorates due to heat conduction
Solution Approach 1:
The intermediate member acts as a thermal barrier mediator placed between the first plate member and the second plate member. This intermediary component prevents direct heat conduction while maintaining the relatively simple overall structure of the fire door assembly.
Solution Approach 2:
The fire door employs a composite structure combining different materials with varying thermal conductivities: the first plate member and second plate member (likely metal for strength and fire resistance) are separated by an intermediate member with lower thermal conductivity, creating a composite assembly that balances structural requirements with thermal insulation performance.
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 enhances the thermal resistance between plate members, effectively preventing heat conduction and ensuring superior heat shielding performance, thereby preventing fire spread across floors.
Implementation Method 1
a first heat insulating material arranged between the first plate member and the intermediate member; a second heat insulating material arranged between the second plate member and the intermediate member
Data Source
AI summary
A fire door includes an intermediate member formed in the shape of a plate and arranged between a first plate member and a second plate member; a first heat insulating material arranged between the first plate member and the intermediate member; a second heat insulating material arranged between the second plate member and the intermediate member; a first coupling member for coupling the first plate member and the intermediate member, arranged so as to extend through the first heat insulating material; and a second coupling member for coupling the second plate member and the intermediate member, arranged so as to extend through the second heat insulating material. The first coupling member is arranged so as to be spaced away from both of the second plate member and the second coupling member. The second coupling member is arranged so as to be spaced away from the first plate member, and the first plate member and the second plate member are arranged so as to be spaced away from each other.