Vehicle Heat Shield Sheet With IR-Transparent Color Layer
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Solution Overview
Problem
Electronic devices installed on vehicles, such as antennas, face temperature rises due to solar heat, necessitating an effective heat shielding solution to maintain performance, especially when positioned under the vehicle's upper plate where direct heat shielding is challenging.
Innovation Solution
A heat shield sheet comprising a low emissivity coating layer with a white color, a base sheet, and a colored infrared transparent layer that transmits infrared rays, allowing for efficient solar heat reflection and inconspicuous integration with the vehicle's body color, while maintaining the versatility of the low emissivity coating layer.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a white low emissivity coating layer is used to reflect solar heat, then heat shielding performance is improved, but the aesthetic appearance deteriorates
Solution Approach 1:
The patent applies a multi-layer nested structure where the white low emissivity coating layer is positioned between the base sheet and the colored infrared transparent layer. This nested arrangement allows the white layer to perform heat reflection while the outer colored layer maintains aesthetic appearance by matching vehicle body colors.
Solution Approach 2:
The invention uses a composite structure combining three different functional layers: a base sheet providing structural support, a white low emissivity coating layer for heat reflection, and a colored infrared transparent layer for aesthetic appearance. This composite material approach resolves the contradiction by assigning different functions to different layers.
2Shape
If a colored layer is added to match vehicle body color, then aesthetic appearance is improved, but infrared ray transmission capability may deteriorate
Solution Approach 1:
The patent applies local quality by making the colored layer specifically transparent to infrared rays while maintaining its color for visible light. This selective optical property allows the layer to serve dual purposes: aesthetic appearance for visible light and heat transmission for infrared rays.
Solution Approach 2:
The invention changes the optical parameters of the colored layer by selecting materials and formulations that exhibit selective transparency - transparent to infrared radiation while maintaining color appearance in the visible spectrum. This parameter optimization resolves the contradiction between aesthetics and thermal performance.
3Temperature
If the low emissivity coating layer is positioned closer to the electronic device, then heat shielding effectiveness is improved, but the complexity of the sheet structure increases
Solution Approach 1:
The patent segments the heat shield into three distinct functional layers with clear boundaries and specific functions. This segmentation allows each layer to be optimized independently for its specific function while maintaining overall structural simplicity through a systematic layered approach.
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 heat shield sheet effectively suppresses temperature rises in electronic devices by reflecting solar heat and transmitting infrared rays, maintaining performance and aesthetics, with improved versatility and minimal interference with heat dissipation.
Implementation Method 1
a low emissivity coating layer having a white color... configured to reflect solar heat
Implementation Method 2
a colored infrared transparent layer stacked on a solar radiation side of the low emissivity coating layer and configured to transmit infrared rays
Data Source
AI summary
A heat shield sheet stacked at an upper surface of an upper plate of a vehicle includes a low emissivity coating layer having a white color, a base sheet on which the low emissivity coating layer is stacked, and a colored infrared transparent layer that is stacked on a solar radiation side of the low emissivity coating layer and transmits infrared rays. Since the low emissivity coating layer is a white color, the reflectance of sunlight is high. Therefore, the solar heat can be reflected efficiently by the low emissivity coating layer.