Insulated Glazing with Low-Emissive Sunblind
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing insulating glass with low-e layers between two panes faces challenges in achieving high thermal insulation while maintaining high light transmission and sun protection, as additional panes are needed to accommodate multiple low-e layers, leading to increased material costs, weight, and reduced visible light transmission.
Innovation Solution
A sunshade with a low-e layer on its side facing away from the glass pane allows an additional low-e layer between the glass panes without trapping infrared radiation, effectively creating two independent thermal insulation areas when closed, thus enhancing thermal performance without additional glass panes or material costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If an additional pane of glass is provided to accommodate a second low-e layer, then thermal insulation is improved, but material costs and weight increase
Solution Approach 1:
The patent combines the sun protection function with the thermal insulation function by integrating a low-e layer directly onto the sun protection element (blind slats). This merging allows the sun protection to also act as a thermal barrier, eliminating the need for an additional glass pane that would otherwise be required to provide a second low-e layer for enhanced thermal insulation.
2Loss of energy
If an additional pane of glass is provided to accommodate a second low-e layer, then thermal insulation is improved, but weight increases
Solution Approach 1:
The patent merges the thermal insulation function into the sun protection element by applying a low-e layer to the blind slats. This integration allows the existing sun protection structure to serve dual purposes: blocking solar radiation and providing thermal insulation, thereby avoiding the weight penalty of adding another glass pane.
3Loss of energy
If multiple low-e layers are provided in the space between glass panes, then thermal insulation is improved, but infrared radiation trapping occurs
Solution Approach 1:
The patent segments the intermediate space by positioning the sun protection element with its low-e layer within the space between the glass panes. This segmentation divides the single intermediate space into functional zones, allowing the sun protection to reflect infrared radiation from one direction while the glass pane low-e layer handles the other direction, preventing radiation trapping.
Solution Approach 2:
Instead of placing multiple low-e layers on the glass panes facing each other (which would trap radiation), the patent inverts the approach by placing one low-e layer on the sun protection element that faces away from the glass pane low-e layer. This inverted configuration allows infrared radiation to be reflected back toward the sun protection side rather than being trapped between two facing low-e layers.
4Loss of energy
If multiple low-e layers are provided in the space between glass panes, then thermal insulation is improved, but light transmission is reduced
Solution Approach 1:
The patent segments the thermal insulation function between two separate components: the glass pane low-e layer and the sun protection low-e layer. This segmentation allows each layer to be optimized for its specific function while maintaining overall light transmission, as the sun protection element can be positioned to minimize impact on visible light when not in use.
Solution Approach 2:
The patent introduces dynamic control through the movable sun protection element. The low-e layer on the sun protection can be deployed or retracted as needed, allowing the system to dynamically adjust between maximum light transmission (when sun protection is retracted) and enhanced thermal insulation (when sun protection is deployed), unlike static multiple low-e layer configurations.
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 achieves high thermal insulation and light transmission, allowing adjustable heat input for energy efficiency, with the sun protection providing effective sun protection and reduced material costs, while being structurally simple and cost-effective.
Implementation Method 1
have a high degree of reflection for long-wave electromagnetic radiation (infrared light) but a low degree of reflection for short-wave electromagnetic radiation (visible light)
Implementation Method 2
a layer, in particular a coating or vaporization, with a comparatively low emissivity in the infrared range
Implementation Method 3
the sunshade additionally having a layer that acts on the incident infrared radiation
Implementation Method 4
a coating of the slats of the sun protection designed as a blind to increase the reflection for infrared light
Implementation Method 5
layers with a comparatively low emissivity in the infrared range are known to improve the thermal insulation
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The glass has two glass panes (1, 2) separated by an intermediate space, where one of the glass panes has a layer (6) i.e. coating, with low emissivity in infrared region. The layer is provided at a glass pane side facing the intermediate space. A sunblind (7) is provided in the intermediate space and movable from an open position to a closed position. The sunblind has a layer (8) on which impinging infrared radiation acts. The latter layer is provided on a sunblind side that is turned away from the glass pane side. The latter layer has low emissivity in the infrared region.