Passive Non-Electrical Dual-Stage Fire Suppression System
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Solution Overview
Problem
Redundant fire suppression systems increase cost and complexity while maintaining the same failure modes, and existing redundancy methods, such as combining different active systems, can also escalate costs and complexity without effectively addressing simultaneous system failures.
Innovation Solution
A passive non-electrical dual-stage fire suppression system where a first active fire suppressant unit detects a fire and activates a second standby unit, which then releases a second fire suppressant agent upon continued or new fire detection, utilizing independent fire detection units and valves to manage pressure and release of fire suppressant agents.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If redundant fire suppression systems are implemented, then system reliability is improved, but device complexity and cost increase
Solution Approach 1:
The fire suppression system is divided into two distinct stages: a first active fire suppressant unit and a second standby fire suppressant unit. Each unit operates independently with its own detection and release mechanisms, allowing the system to provide redundant protection while maintaining simpler individual components rather than duplicating complex active systems.
Solution Approach 2:
The second fire suppressant unit is pre-positioned in a standby state with its suppressant agent ready for release. When the first unit activates, a signal triggers the second unit to become active, ensuring immediate redundant protection is available without requiring continuous power or complex active control systems for both units simultaneously.
2Reliability
If multiple independent active systems are combined for redundancy, then system reliability is improved, but cost and complexity increase
Solution Approach 1:
The system applies different operational characteristics to different units: the first unit is an active system with continuous monitoring and immediate response capability, while the second unit is a standby system activated only when needed. This local differentiation allows cost-effective redundancy by matching each unit's capability to its specific role in the fire suppression sequence.
3Reliability
If passive non-electrical activation mechanism is used, then system reliability is improved by avoiding electrical failure, but device complexity increases
Solution Approach 1:
The system replaces electrical activation mechanisms with a passive mechanical or pneumatic signal transmission system. When the first suppressant unit releases its agent, the resulting pressure change or mechanical movement directly triggers the second unit's activation without requiring electrical sensors, wiring, or power sources, thereby eliminating electrical failure modes.
Data Source
AI summary
Methods and apparatus for passive non-electrical dual stage fire suppression according to various aspects of the present invention include detecting a fire with a first active fire suppressant unit and changing the status of a second fire suppressant unit from “stand-by” to “active” when the first fire suppressant unit releases a fire suppressant agent. After the first fire suppressant unit has released its fire suppressant agent, the second fire suppressant unit may detect a continued and/or a new fire and release a second fire suppressant agent in response to the detection.