Vehicle Window Thermal Insulation Layer Design
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Solution Overview
Problem
Existing thermal insulation structures for vehicle window devices face challenges in maintaining heat-resistance and thermal insulation properties while minimizing the thickness of the insulation layer, as increasing the thickness of a single thermal insulation material can compromise heat-resistance performance and limited space within the device is a constraint.
Innovation Solution
A thermal insulation structure is implemented with a heater and a heat-receiving component, where a thermal insulation layer is formed by superimposing multiple materials, with the material closest to the heater having greater heat resistance and the material furthest from the heater having lower thermal conductivity, effectively inhibiting thickness increase and enhancing insulation performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a single sheet of thermal insulation material is used to improve thermal insulation performance, then thermal insulation performance is improved, but thickness must be increased which compromises device space and heat-resistance performance
Solution Approach 1:
The patent applies composite materials by combining multiple different thermal insulation materials (such as air-permeable foam material and air-impermeable foam material) into a single thermal insulation layer. This composite structure achieves superior thermal insulation performance compared to single materials, allowing the thickness to be reduced while maintaining or improving insulation effectiveness. The different materials complement each other's properties to optimize both insulation performance and thickness constraints.
Solution Approach 2:
The patent applies local quality by using different thermal insulation materials in different regions or layers of the thermal insulation layer. Specifically, air-permeable foam material is used in contact with the heater where heat resistance is critical, while air-impermeable foam material is used in other regions where thermal insulation is the primary concern. This localized material selection optimizes the overall performance while controlling thickness.
2Loss of energy
If the thickness of thermal insulation material is increased to improve thermal insulation performance, then thermal insulation performance is improved, but heat-resistance performance deteriorates
Solution Approach 1:
The patent uses composite materials with complementary properties: air-permeable foam material provides excellent heat resistance and structural stability when in contact with the heater, while air-impermeable foam material provides superior thermal insulation. This combination achieves both heat-resistance performance and thermal insulation performance without requiring increased thickness, as each material contributes its strength in the composite structure.
Solution Approach 2:
The patent applies local quality by strategically placing heat-resistant materials (air-permeable foam) in regions requiring heat resistance (contact area with heater) and insulating materials (air-impermeable foam) in regions requiring insulation. This localized optimization ensures heat-resistance performance is maintained at the critical interface while achieving overall thermal insulation performance throughout the layer.
3Length of stationary object
If a single thermal insulation material is used to reduce thickness, then thickness is reduced, but it is difficult to simultaneously ensure both heat-resistance and thermal insulation properties
Solution Approach 1:
The patent successfully reduces thickness while ensuring both heat-resistance and thermal insulation properties through composite materials. The multi-material structure (air-permeable foam + air-impermeable foam) provides complementary functions in a compact configuration, achieving superior performance per unit thickness compared to single materials. This allows the thermal insulation layer to be thinner while maintaining or improving both heat-resistance and insulation properties simultaneously.
Solution Approach 2:
The patent applies local quality by assigning different materials to different functional requirements within the thin thermal insulation layer. The air-permeable foam material handles heat resistance requirements at the heater interface, while the air-impermeable foam material handles thermal insulation requirements in the outer regions. This functional differentiation within a compact thickness achieves both properties simultaneously.
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
This configuration ensures both heat-resistance and thermal insulation properties without increasing the thickness of the insulation layer, allowing for efficient heat transfer and reduced heat loss, thereby effectively addressing the limitations of single-material insulation structures.
Implementation Method 1
a thermal insulation layer that is provided at a surface of the heater on an opposite side from the heat-receiving component
Implementation Method 2
Heat from the heater is received by this heat-receiving component and, as radiant heat, then warms the portions of the windshield through which light beams are transmitted
Implementation Method 3
the thermal insulation material on the furthest side from the heater has a lower thermal conductivity than the thermal insulation material on the closest side to the heater
Data Source
AI summary
A thermal insulation structure for a vehicle window device is provided with a heater is disposed on a vehicle interior side, a heat-receiving component that is provided between the window and the heater, and that, by receiving heat from the heater, imparts radiant heat to the window, and a thermal insulation layer that is provided at a surface of the heater on an opposite side from the heat-receiving component, wherein the thermal insulation layer is formed by mutually superimposing a plurality of thermal insulation materials, and of the plurality of thermal insulation materials, a thermal insulation material on a closest side to the heater has greater heat resistance than a thermal insulation material on a furthest side from the heater, and the thermal insulation material on the furthest side from the heater has a lower thermal conductivity than the thermal insulation material on the closest side to the heater.