Door-Mounted Fire Safety Lights for Smoke-Obscured Exit Guidance
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Solution Overview
Problem
Conventional smoke detectors in residential living spaces alert occupants of a fire but fail to guide them to exits, especially in dense smoke conditions, leading to increased fire-related injuries and deaths.
Innovation Solution
A fire safety light system comprising a smoke detector, transmitter, control circuitry, and LED lights mounted on interior doors along exit paths, which illuminate in response to a fire trigger signal to provide a clear evacuation route.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If smoke detectors are installed on ceilings to detect smoke, then fire detection capability is improved, but guidance to exits during fire is lost due to smoke obscuration
Solution Approach 1:
The system divides the fire safety function into two separate components: smoke detection (performed by ceiling-mounted detectors) and exit guidance (performed by door-mounted lights). This segmentation allows each component to perform its specialized function effectively - detectors remain in optimal detection positions while lights are placed at strategic exit points where they can guide occupants through smoke-filled environments.
Solution Approach 2:
The door-mounted fire safety lights serve as an intermediary between the smoke detection system and the occupants. When smoke detectors detect fire, they trigger the lights mounted on doors along exit paths, which then provide visual guidance to occupants moving through smoke-obscured environments. The lights mediate the information transfer from detection to safe evacuation.
2Adaptability or versatility
If multiple exit routes are required for bedrooms, then evacuation options are improved, but occupancy confusion increases without visual guidance
Solution Approach 1:
The system uses light emission (a form of optical signal change) to differentiate and highlight active exit paths. The fire safety lights on doors create visual contrast against the smoke-filled environment, making exit routes clearly identifiable. This optical signaling system guides occupants along the correct path without causing confusion about which exits are safe to use.
3Loss of information
If fire safety lights are mounted on doors along exit paths, then exit guidance is improved, but system complexity increases
Solution Approach 1:
The system merges the fire detection and exit guidance functions into an integrated system. The smoke detector and door-mounted lights are connected through interconnection wiring, allowing the lights to be automatically triggered by smoke detection without requiring separate control systems. This combining of functions reduces overall system complexity while providing comprehensive fire safety coverage.
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
Enhances evacuation efficiency by guiding occupants to exits, potentially reducing fire-related injuries and deaths by illuminating exit paths during a fire.
Implementation Method 1
several fire safety lights, for example, LED lights, mounted on or near the bottom rail of interior and exterior doors
Data Source
AI summary
A system is disclosed comprising a smoke detector, a transmitter, several fire safety lights, and control circuitry, mounted on or near the bottom rail of interior and exterior doors along exit paths within the living space. The fire safety lights on all doors along an exit path are wired together and illuminate during a fire in response to a trigger signal from the control circuit to provide a viable exit path for the occupants. The fire safety lights along the exit paths of the living space provide for faster evacuation of the living space, thus potentially reducing injury and possible deaths from the fire.