Reusable Fire Detection Tube with Phase-Change Sensing Fluid
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing fire detection systems for vehicles, which use self-destructing mechanisms to release fire suppressants, are not reusable and lack efficient temperature-based activation methods.
Innovation Solution
A fire detection and actuation system utilizing a sensing fluid that changes physical conditions and pressure in response to temperature, actuating a release valve to distribute fire suppressant without requiring melting or bursting, allowing for multiple reusable cycles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If self-destructing fire detection mechanisms are used to detect heat and trigger fire suppressant release, then fire detection and suppression can be achieved, but the system becomes non-reusable and requires replacement after each activation
Solution Approach 1:
The patent applies this principle in reverse - instead of using disposable detection mechanisms, it employs a reusable detection system where the sensing fluid contained in the bulb can undergo multiple phase change cycles. The bulb and sensing fluid assembly is designed to be resettable, allowing the system to be used repeatedly without replacement, thereby resolving the contradiction between reliability and reusability.
Solution Approach 2:
The patent recovers the sensing fluid by containing it within a reusable bulb structure. After the sensing fluid undergoes phase change to trigger suppression, it can be recovered and reused in subsequent detection cycles. This recovery approach eliminates the need for disposable mechanisms while maintaining reliable fire detection capability.
2Productivity
If self-destructing mechanisms are used for fire suppression activation, then fire suppressant release can be triggered, but the system requires complex replacement procedures and downtime
Solution Approach 1:
The patent inverts this principle by creating a durable, reusable detection system. The sensing bulb is designed to withstand multiple thermal cycles without degradation, eliminating the need for time-consuming replacements and reducing system downtime between fire events.
Solution Approach 2:
The system is pre-configured with the sensing fluid and containment bulb in a ready-to-use state. The bulb is designed beforehand to withstand the thermal expansion and phase changes of the sensing fluid, so no preliminary preparation or replacement is needed after activation, thus eliminating loss of time.
3Measurement precision
If traditional heat detection methods are used, then fire detection can be achieved, but the activation mechanism lacks precision in temperature-based triggering
Solution Approach 1:
The patent employs phase transitions of the sensing fluid (such as liquid to gas transition) at specific temperature thresholds to trigger activation. This phase change mechanism provides precise temperature-based triggering because the phase transition occurs at well-defined temperatures, achieving high measurement precision without requiring complex electronic sensors or processing circuits.
Solution Approach 2:
The system uses pneumatic pressure generated by the phase-changing sensing fluid to actuate the fire suppressant release mechanism. The pressure buildup from the phase transition directly drives the activation, eliminating the need for complex electronic or mechanical detection mechanisms while maintaining precise temperature-based control.
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
Enables efficient and reusable fire suppression by accurately activating the release of fire suppressants based on temperature thresholds, effectively addressing the limitations of existing systems.
Implementation Method 1
A fire detection and actuation system utilizes a sensing fluid that changes physical conditions and pressure in response to temperature
Implementation Method 2
A fire detection and actuation system utilizes a sensing fluid that changes physical conditions and pressure in response to temperature
Data Source
Figure 1~2
Figure 3~5
Figure 4a~4b
AI summary
A fire detection system includes a detection tube (22) and a sensing device (16). The detection tube (22) contains a sensing fluid (23) having a first physical condition and a second physical condition. The sensing fluid (23) is in the first physical condition below a temperature threshold, and is in the second physical condition above the temperature threshold. The sensing fluid (23) is at least partially liquid in the first physical condition. The sensing device (16) is movable to open in response to a transition of a portion of the sensing fluid from the first physical condition to the second physical condition.