Intumescent Firestop Element for Downlight Ceiling Penetration
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Solution Overview
Problem
Downlights in buildings pose a fire hazard as they can spread fire through ceiling openings and potentially ignite due to their design, necessitating a solution to contain fires effectively.
Innovation Solution
A firestop element made of a polymer intumescent composition is integrated into the downlight fixture, which deploys to block flames and heat transfer by expanding and forming a char barrier when exposed to high temperatures, thereby reducing the risk of fire spread and ignition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a downlight fixture is installed in a ceiling, then lighting functionality is provided, but fire spread through the ceiling opening is enabled
Solution Approach 1:
A firestop element is pre-installed within the downlight fixture housing, positioned to automatically deploy and seal the ceiling opening when fire conditions are detected, thereby preventing fire spread before it can occur through the opening
Solution Approach 2:
The firestop element acts as an intermediary component between the downlight fixture and the ceiling opening, providing a fire-resistant barrier that allows the downlight to function while preventing fire spread through the opening
2Strength
If the firestop element is made of rigid material, then structural strength is improved, but adaptability to deploy in fire conditions deteriorates
Solution Approach 1:
The firestop element utilizes a phase-change material that transitions from a rigid state during normal operation to a softened, deformable state when exposed to fire temperatures, enabling it to expand and seal the ceiling opening dynamically in response to fire conditions
Solution Approach 2:
The firestop element incorporates a phase-change material that undergoes a phase transition from solid to a softer, more pliable state at elevated temperatures, allowing it to deform and conform to seal the ceiling opening effectively when fire conditions are present
3Object-affected harmful factors
If the firestop element blocks the ceiling opening completely, then fire spread is prevented, but heat dissipation from the downlight deteriorates
Solution Approach 1:
The firestop element provides localized fire protection at the ceiling opening while maintaining thermal management capabilities through its material composition and geometric design, allowing heat to dissipate through the downlight fixture while preventing fire spread through the sealed opening
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 firestop element effectively blocks flames and reduces heat transfer, minimizing the risk of fire spreading through ceiling openings and preventing the downlight from igniting, thus enhancing fire safety in buildings.
Implementation Method 1
A firestop element is provided which is fabricated from a polymer intumescent composition... the firestop element fabricated of a polymer intumescent composition... expanding and forming a char barrier when exposed to high temperatures
Data Source
AI summary
A firestop element is provided which is fabricated from a polymer intumescent composition. The element is associated with a light can of a downlight. In some embodiments, the firestop element drops to a deployed position in the light can in the event of a fire.