Fire Rated Door With Expandable Intumescent Core
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Solution Overview
Problem
Existing fire doors are impractical in tight spaces, allow heat, air, and smoke to pass through due to gaps, and are aesthetically unpleasing, while also struggling to provide effective fire protection in open areas like atriums or auditoriums without existing hallways or barriers.
Innovation Solution
A fire-rated door with an expandable core that seals gaps between the door and the opening, using intumescent materials that expand at elevated temperatures to create a barrier against heat, air, and smoke, and a siliconized rubber perimeter seal to restrict infiltration, allowing the door to move between retracted and extended positions while maintaining a seal up to 2000°F.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the thickness of the door is increased to improve fire resistance, then fire protection is improved, but the door becomes impractical in tight spaces and heavy
Solution Approach 1:
The door incorporates an expandable core that transitions from a compressed state during normal operation to an expanded state when exposed to fire conditions. This dynamic transformation allows the door to maintain a thin profile for easy installation while automatically increasing its fire resistance when needed, resolving the contradiction between thin door thickness and fire protection capability.
Solution Approach 2:
The door utilizes materials and mechanisms that change their physical parameters in response to temperature changes. The expandable core increases its volume and the door gains thermal insulation properties when heated, allowing the same door structure to provide enhanced fire protection without requiring increased thickness under normal conditions.
2Reliability
If the thickness of the door is increased to improve fire resistance, then fire protection is improved, but the door becomes heavy and impairs storage
Solution Approach 1:
The door incorporates an expandable core that transitions from a compressed state during normal operation to an expanded state when exposed to fire conditions. This dynamic transformation allows the door to maintain a thin profile for easy installation while automatically increasing its fire resistance when needed, resolving the contradiction between thin door thickness and fire protection capability.
Solution Approach 2:
The door utilizes materials and mechanisms that change their physical parameters in response to temperature changes. The expandable core increases its volume and the door gains thermal insulation properties when heated, allowing the same door structure to provide enhanced fire protection without requiring increased thickness under normal conditions.
3Ease of operation
If gaps are left between the door and doorway for movement, then door operation is improved, but heat, air, smoke, and fire can pass through
Solution Approach 1:
The door incorporates an expandable core that transitions from a compressed state during normal operation to an expanded state when exposed to fire conditions. This dynamic transformation allows the door to maintain a thin profile for easy installation while automatically increasing its fire resistance when needed, resolving the contradiction between thin door thickness and fire protection capability.
Solution Approach 2:
The door utilizes materials and mechanisms that change their physical parameters in response to temperature changes. The expandable core increases its volume and the door gains thermal insulation properties when heated, allowing the same door structure to provide enhanced fire protection without requiring increased thickness under normal conditions.
4Reliability
If traditional seals are used to prevent heat and smoke infiltration, then fire protection is improved, but the seals fail at high temperatures above 400°F
Solution Approach 1:
The door combines traditional seal materials with high-temperature resistant materials in a composite sealing system. The expandable core is integrated with the sealing mechanism, creating a composite structure that maintains sealing effectiveness at temperatures above 400°F while preserving the door's ability to block heat, air, smoke, and fire.
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 door effectively seals gaps and provides comprehensive fire protection in tight and open spaces by expanding to fill gaps and resisting heat, air, and smoke infiltration, meeting stringent temperature requirements and aesthetic considerations.
Implementation Method 1
the core configured to expand from a relaxed state to an expanded state and provide a seal between the door and an edge of the opening when the core is in the expanded state. The core may be configured to expand in response to an increase in temperature.
Implementation Method 2
a siliconized rubber perimeter seal configured to restrict infiltration of heat, air, smoke, and/or fire migration
Data Source
AI summary
A closure may include a door configured to seal an opening. The door may include a section with an internal cavity. The closure may also include a core within a first portion of the internal cavity of the section. The core may be configured to expand from a relaxed state to an expanded state and provide a seal between the door and an edge of the opening when the core is in the expanded state.