Solar Control Member with Optically Massive Layer
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Solution Overview
Problem
Existing solar control technologies for windows face challenges in achieving optimal solar performance while maintaining structural stability and preventing cracking, particularly due to the susceptibility of titanium nitride layers to cracking during installation and use.
Innovation Solution
A solar control member is designed with an optically massive layer, such as a thick PET substrate or adhesive, between a titanium nitride layer and a gray metal layer, which enhances mechanical stability and optical performance by preventing constructive and destructive interference of reflected light, and is preferably formed with nickel chromium or other gray metals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a titanium nitride layer is used for solar control, then solar performance is improved, but the layer becomes susceptible to cracking during installation and use
Solution Approach 1:
The patent uses a composite structure combining titanium nitride layer with a gray metal layer (such as nickel-chromium alloy). This composite material approach allows the titanium nitride to provide superior solar control performance while the gray metal layer provides mechanical durability and crack resistance, resolving the contradiction between optical performance and structural strength.
Solution Approach 2:
The patent optimizes the thickness parameters of both the titanium nitride layer and the gray metal layer. By carefully controlling these dimensional parameters, the design achieves the desired solar control performance while maintaining sufficient mechanical integrity to prevent cracking during installation and long-term use.
2Strength
If the titanium nitride layer is made thinner to reduce cracking, then crack resistance is improved, but solar control performance deteriorates
Solution Approach 1:
The composite structure allows the titanium nitride layer to be optimized for solar control without needing to be excessively thick, while the gray metal layer compensates for reduced thickness by providing the necessary mechanical strength and crack resistance.
3Stability of the object's composition
If a gray metal layer is added to improve crack resistance, then structural stability is improved, but device complexity increases
Solution Approach 1:
The patent employs a simple two-layer composite structure (titanium nitride + gray metal) that provides both solar control and mechanical stability. This straightforward composite approach avoids the complexity of multi-layer systems while achieving the desired structural stability through the synergistic combination of two carefully selected materials.
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 achieves superior solar performance with higher infrared reflection and reduced visible light transmissivity, while minimizing the susceptibility to cracking and providing improved mechanical stability, resulting in enhanced solar rejection and reduced heat gain through windows.
Implementation Method 1
an optically massive layer, such as a thick PET substrate or adhesive, between a titanium nitride layer and a gray metal layer, which enhances mechanical stability and optical performance by preventing constructive and destructive interference of reflected light
Implementation Method 2
heat load may be reduced by partially blocking solar transmission (TSOL) in one or both of the visible portion of the solar spectrum and the near infrared (700 nm to 1200 nm) portion
Implementation Method 3
higher infrared reflection
Data Source
AI summary
A solar control member for determining solar control for a window includes an optically massive layer between a gray metal layer and a titanium nitride layer. The optically massive layer has sufficient thickness to retard or prevent constructive and destructive interference of reflected light. The optically massive layer may be an adhesive, but also may be one or more polymeric substrates. The gray metal layer is preferably nickel chromium, but other gray metal materials provide superior results as compared to the prior art. Also in the preferred embodiment, the titanium nitride layer is closer to the window (e.g., glass) than the gray metal layer.