Egg Crate Grate Sunshade for Infrared Blocking
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Solution Overview
Problem
Current window treatments fail to effectively reduce infrared heating from sunlight while maintaining a view and being cost-effective, as they either block visible light, require frequent adjustments, or have limited seasonal adaptability.
Innovation Solution
An egg crate style grate is mounted outside a building to block or diffuse infrared sunlight, allowing visible light to pass through, and can be oriented at a functional angle to optimize performance throughout the day, with optional coatings and a transparent acrylic cover for aesthetic and functional enhancement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If dense shade is used to block infrared sunlight, then infrared heating is reduced, but the view through the window is obscured and the shading effect is temporary as the sun moves
Solution Approach 1:
The window surface is segmented into multiple small reflective elements (mirrors or metallic coatings) arranged in a grid or pattern. Each segment reflects infrared radiation while allowing visible light to pass through the gaps between segments, achieving selective wavelength filtering without obscuring the view.
Solution Approach 2:
Different regions of the window treatment have different optical properties - certain areas are designed to reflect infrared radiation while remaining transparent to visible light. The reflective elements are strategically positioned and oriented to target infrared wavelengths specifically, creating local zones of infrared blockage that don't interfere with overall visibility.
2Object-affected harmful factors
If internal curtains and blinds are used to control visible light, then privacy and light control are improved, but infrared blocking is minimal and frequent adjustment is required
Solution Approach 1:
The window treatment automatically adjusts to changing sunlight conditions without user intervention. The reflective elements are positioned and oriented to passively reflect infrared radiation at various angles as the sun moves across the sky, providing continuous infrared blocking throughout the day without requiring manual adjustment.
Solution Approach 2:
The window treatment incorporates dynamic elements that automatically respond to changing solar angles - such as adjustable reflective surfaces or movable components that optimize infrared reflection throughout the day. This dynamic adaptation eliminates the need for frequent manual adjustments while maintaining effective infrared blocking.
3Object-affected harmful factors
If awnings are used to shade windows, then direct sunlight is blocked, but the view is limited and the structure is permanent and costly
Solution Approach 1:
Instead of a single large awning structure, the solution segments the shading function into multiple small reflective elements applied directly to the window surface. This eliminates the need for complex external structures while achieving similar sunlight blocking效果, maintaining simplicity and reducing cost.
Solution Approach 2:
The solution transitions from external three-dimensional awning structures to a two-dimensional surface treatment applied directly to the window. This dimensional change eliminates the need for complex external support structures while maintaining effective sunlight and infrared blocking, simplifying the overall system.
4Object-affected harmful factors
If a grate is mounted near the window, then infrared absorption is increased, but the appearance of the window is altered and installation complexity increases
Solution Approach 1:
The infrared-blocking function is integrated into a thin film or coating applied directly to the window surface, eliminating the need for bulky external grates. This thin-film approach maintains the window's original appearance and simplifies installation while effectively absorbing or reflecting infrared radiation.
Solution Approach 2:
The window treatment uses composite materials that combine infrared-absorbing or infrared-reflecting properties with aesthetic transparency. These composite materials can be applied as coatings or laminates that maintain the window's visual appearance while providing the desired infrared blocking function.
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 significantly reduces energy costs by automatically shading windows from infrared heating while maintaining a view and being adaptable to different orientations and seasons, with the added benefit of reducing UV impact and maintaining a window-like appearance.
Implementation Method 1
An egg crate style grate is mounted outside a building and blocks or diffuses or absorbs sunlight. Less incident IR then enters through the building window
Implementation Method 2
An egg crate style grate is mounted outside a building and blocks or diffuses or absorbs sunlight
Data Source
AI summary
An energy saving grate installed outside a building or structure in warm weather that reduces heating due to infrared radiation (IR) from sunlight. For a window application the grate acts as a sunshade to block or diffuse the IR and ultraviolet (UV) portions of sunlight while passing visible light. The grate cell size, depth, cell surface characteristics, and mounting details near the sash determine system performance of sunlight control, of the view through the grate, and of the exterior appearance. The grate is removable for cool weather. The grate system can cool various surfaces and requires no operating adjustments. It can be applied near most windows (including skylights) on all sides of a building where impinging sunlight causes unwanted heating. Compared to external solar thin mesh screens the grate system can provide more open area for a given performance in reduced IR heating.