Electrically Heatable Sheet With Latent Heat Storage
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Solution Overview
Problem
Existing electrically heatable fabrics suffer from non-homogeneous heat distribution, limited voltage operation, and restricted application variability, leading to inefficient and localized heating.
Innovation Solution
An electrically heatable fabric with a carrier, insulated resistance heating elements, and a thermally conductive metallic foil for even heat distribution, allowing operation at higher voltages and integration of latent heat storage for continuous heat emission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If conventional uninsulated heating wires are used, then the structure remains simple, but the voltage is limited to 24V or less due to fire or arcing risks
Solution Approach 1:
An electrical insulation layer is introduced as an intermediary between the heating element and the surrounding environment. This insulation layer enables the heating element to operate at higher voltages (greater than 48V) while preventing direct contact that would cause fire or arcing, thus resolving the contradiction between higher voltage operation and safety risks
Solution Approach 2:
The heating element is constructed as a composite structure combining the heating wire with an electrical insulation layer. This composite design allows the system to achieve both high voltage operation capability and safety, as the insulation material prevents electrical breakdown and arcing while the heating wire provides the necessary thermal function
2Temperature
If heating wires are integrated into the support structure, then the heating function is achieved, but the heat distribution across the surface is non-homogeneous with large local temperature variations
Solution Approach 1:
A thermally conductive metallic foil is introduced as an intermediary heat distribution layer between the heating element and the support structure. This foil efficiently conducts heat across the entire surface, creating homogeneous temperature distribution while maintaining overall heating efficiency
Solution Approach 2:
The heating element is designed with non-uniform spacing of heating wires to compensate for heat loss patterns. By adjusting the local density and positioning of heating wires, the system achieves uniform heat distribution across the surface, resolving the contradiction between heating efficiency and temperature uniformity
3Adaptability or versatility
If the structure is made thin and lightweight, then the integration flexibility is improved, but the heat distribution capability may be compromised
Solution Approach 1:
The patent employs thin film structures for both the electrical insulation layer and the thermally conductive metallic foil. These thin films provide excellent flexibility and adaptability for integration into various applications while maintaining sufficient thermal conduction and electrical insulation properties to ensure effective heat distribution
Solution Approach 2:
The structure uses composite material layers combining thin electrical insulation material with thin thermally conductive metallic foil. This composite approach achieves both thinness for flexibility and sufficient thermal management capability, as the metallic foil provides high thermal conductivity despite its thinness
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 solution enables rapid, homogeneous, and long-term heat distribution across a thin and lightweight fabric, suitable for various applications with improved safety and energy efficiency.
Implementation Method 1
The heating element is designed as a resistance heater with electrical insulation
Implementation Method 2
The heat distribution element is provided in the form of a thermally conductive metallic foil adjacent to the heating element
Implementation Method 3
an electrically heated surface structure with latent heat storage
Implementation Method 4
the latent heat storage element, which is directly or indirectly connected to the heating element and the support
Data Source
Figure 1~2
AI summary
Electrically heated surface structure (10) with latent heat storage, comprising a support (1), at least one electrical heating element (2) and a heat distribution element (3), wherein the heating element (2) is designed as a resistance heater with electrical insulation, which is coupled to a latent heat storage element (4), and the heat distribution element (3) is provided in the form of a thermally conductive metallic foil adjacent to the heating element (3), which is directly or indirectly connected to the heating element (2) and the support (1).