Shape-Memory Fire Blanket for Heat-Activated Insulation
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Solution Overview
Problem
Conventional fire blankets made of thin materials lack integrity when exposed to excessive heat, potentially causing skin and property damage, and may contain hazardous materials, failing to provide effective protection during fire events.
Innovation Solution
A fire blanket with shape memory elements that expand to create air pockets upon exposure to high temperatures, enhancing thermal insulation and maintaining structural integrity, using a thermal housing with layers of fire-resistant fabric and shape memory alloy wires.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If thin material layers (asbestos, wool, cotton, fiberglass, carbon felt, aluminum, or silica) are used to make fire blankets, then the blanket can be lightweight and flexible, but the blanket lacks integrity when exposed to excessive heat and may lay directly on the user's skin and/or clothing causing injury
Solution Approach 1:
The fire blanket uses a composite structure combining a fire-resistant fabric layer with shape memory alloy wires embedded within it. This composite design provides both the lightweight flexibility of the fabric and the heat-activated structural integrity of the SMA wires, resolving the contradiction between weight and reliability.
Solution Approach 2:
The shape memory alloy wires undergo a phase transformation when exposed to high temperatures, changing from a compact low-temperature phase to an expanded high-temperature phase. This parameter change in the material's physical state enables the blanket to automatically increase its insulating properties when needed, maintaining integrity without adding permanent bulk.
2Ease of manufacture
If conventional fire blankets are made of single-layer thin material, then they are simple in structure and easy to manufacture, but they fail to provide effective protection and may contain hazardous materials
Solution Approach 1:
The invention combines fire-resistant fabric with shape memory alloy wires in a composite structure that eliminates hazardous materials while providing effective protection. The fabric layer serves as both structural support and insulation, while the SMA wires provide heat-activated structural integrity, replacing toxic single-layer materials with a safe multi-component system.
Solution Approach 2:
The shape memory alloy wires automatically activate and expand when exposed to excessive heat, providing self-regulating protection without requiring external control systems or complex manufacturing processes. This self-service mechanism simplifies operation while enhancing safety.
3Adaptability or versatility
If fire blankets are designed to extinguish objects by laying on top of the fire, then they can be simple in design, but they are not designed to protect a person during a fire event
Solution Approach 1:
The fire blanket is designed with universal functionality to serve both as a fire extinguishing tool and as personal protective equipment. The shape memory alloy wires provide structural integrity that supports both applications, allowing the same device to protect people and property without requiring separate specialized equipment.
Solution Approach 2:
The dynamic phase transformation of the shape memory alloy wires allows the blanket to adapt its properties based on the situation. At low temperatures, the wires remain compact for ease of handling; at high temperatures, they expand to provide structural support for personal protection, enabling one device to perform multiple functions effectively.
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 fire blanket provides enhanced thermal resistance, up to 30 times greater than conventional blankets, offering passive, tunable protection and improved safety by creating insulating air pockets without user effort, reducing burn injuries and fatalities.
Implementation Method 1
one or more shape memory elements having a first orientation at a first temperature, the one or more shape memory elements are retained within a compartment of the thermal housing, the one or more shape memory elements are configured to expand to a second orientation when exposed to a second temperature being greater in value than the first temperature
Implementation Method 2
the blanket thermal insulation characteristics are enhanced reducing the heat flow from the fire to the user
Data Source
AI summary
Disclosed herein is a fire blanket that may include a thermal housing. A fire blanket may include one or more shape memory elements having a first orientation at a first temperature, the one or more shape memory elements are retained within a compartment of the thermal housing, the one or more shape memory elements are configured to expand to a second orientation when exposed to a second temperature being greater in value than the first temperature. The fire escape blanket includes a thermal housing with fire-resistant exterior and interior layers. Shape memory elements are retained between the layers and expand when exposed to elevated temperatures, creating insulating air pockets. A gusset connects the layers and allows expansion as the shape memory elements transform. The blanket includes a hood portion, handles, and hand covers for user protection and maneuverability. Passively activated expansion provides tunable insulation, improving survival chances when escaping fires.