Fireproof Junction Box With Heat-Triggered Internal Fire Suppression
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Solution Overview
Problem
Existing fire extinguishing systems for electrical installations are labor-intensive, have installation limitations, and often require additional fixtures, leading to reduced effectiveness and increased installation complexity.
Innovation Solution
A fire extinguishing agent (FEA) is integrated into a junction box enclosure, utilizing an Aerosol-Forming Composition (AFC) or a mixture of AFC and microencapsulated agent, triggered by heat, to suppress fires within the protected volume without additional fixtures, ensuring high concentration and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fire extinguishing systems (gas cylinders, pyrocord, explosive devices) are installed in electrical cabinets, then fire suppression capability is provided, but installation labor intensity increases and device complexity increases
Solution Approach 1:
The fire extinguishing agent is integrated directly into the junction box enclosure structure, merging the fire safety function with the electrical equipment housing. This eliminates the need for separate fire extinguishing devices, reducing installation complexity while maintaining fire suppression capability.
Solution Approach 2:
The junction box enclosure serves dual functions: protecting electrical equipment and providing fire extinguishing protection. The integrated FEA system allows the same structure to perform multiple functions, reducing the need for additional separate systems.
2Reliability
If fire extinguishing devices are installed using brackets or flat surfaces, then fire protection is provided, but location flexibility is limited and installation complexity increases
Solution Approach 1:
The fire extinguishing system is merged with the junction box enclosure itself, eliminating the need for separate mounting brackets or flat surfaces. The FEA is positioned within the enclosure structure, allowing the device to be installed directly in any junction box location without additional fixation elements.
3Reliability
If standard flame-extinguishing agents are used in pipelines and nozzles, then fire extinguishing function is provided, but chemical safety is compromised and installation complexity increases
Solution Approach 1:
The harmful pipelines and nozzles are extracted from the system. Instead of using external delivery systems with standard flame-extinguishing agents, the invention uses an integrated FEA composition that generates extinguishing agents directly within the enclosure, eliminating the chemical safety risks associated with external pipelines and nozzles.
4Reliability
If multiple separate fire extinguishing components are installed, then comprehensive fire protection is achieved, but installation time and labor intensity increase
Solution Approach 1:
Multiple fire extinguishing components are merged into a single integrated FEA system within the junction box enclosure. This consolidation reduces the number of separate installation steps and components, significantly reducing installation time and labor intensity while maintaining comprehensive fire protection.
Solution Approach 2:
The FEA composition is pre-positioned within the junction box enclosure during manufacturing, so that no additional fire extinguishing components need to be installed separately. This preliminary integration eliminates multiple installation steps and reduces overall installation time.
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 integrated FEA system effectively suppresses fires within junction boxes by releasing high-concentration extinguishing agents, reducing installation complexity and ensuring efficient fire suppression in any location, without affecting electrical equipment.
Implementation Method 1
FEA (2) begins to generate fire extinguishing aerosol and phlegmatizing agents in the gas phase into the protected volume at a high rate
Implementation Method 2
a heat triggering composition is applied to the FEA, with an initiation temperature lower than the initiation temperature of the FEA
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to electrical equipment, and more particularly to electrical junction boxes having in the structure thereof a fire extinguishant for preventing combustion. The technical problem addressed by the claimed solutions is that of broadening the functional capabilities of electrical junction boxes. The technical result of the claimed invention consists in making it possible to completely suppress combustion inside an electrical junction box without the use of external fire-extinguishing means. This technical result is achieved in a fireproof electrical junction box comprising a polymer housing with inner projections that form a cavity for holding a fire extinguishant designed to be capable of exiting into the space of the housing to be protected, said fire extinguishant consisting of an aerosol-forming composition (AFC) or a mixture of an AFC and a microencapsulated agent. The technical result is also achieved in a fireproof electrical junction box comprising a polymer housing with a thermal cord disposed therein that is filled with a fire extinguishant designed to be capable of exiting into the space of the housing to be protected, said fire extinguishant consisting of an aerosol-forming composition (AFC) or a mixture of an AFC and a microencapsulated agent.