Insulating Glass Unit Sealed Opening for Elevation Pressure Control
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Solution Overview
Problem
Insulating glass units experience optical distortion and seal stress due to pressure differences between the manufacturing and installation locations, causing glass panes to bow and weaken the seal.
Innovation Solution
The insulating glass units are equipped with features such as a septum or valve that allow pressure adjustment of the gas within the between-pane space, enabling the gas pressure to match the ambient pressure at the installation location, thereby maintaining pane alignment and seal integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the insulating glass unit is sealed at manufacturing location pressure, then the gas space is hermetically sealed, but pressure differences cause glass pane bowing and optical distortion at different elevations
Solution Approach 1:
The patent incorporates a pressure equalization valve that allows the sealed gas space to dynamically adjust its internal pressure in response to external pressure changes. This dynamic mechanism enables the glass panes to maintain their flat shape at different elevations while preserving seal integrity, resolving the contradiction between hermetic sealing and pressure adaptation.
Solution Approach 2:
The patent changes the pressure parameter of the sealed gas space by incorporating a valve mechanism that allows pressure equalization with the external environment. This parameter change enables the system to adapt to different elevation pressures while maintaining seal integrity and preventing glass pane bowing.
2Reliability
If the insulating glass unit is sealed at manufacturing location pressure, then the gas space is hermetically sealed, but pressure differences create tensile stress on the peripheral seal
Solution Approach 1:
The pressure equalization valve creates a dynamic system where the internal gas pressure can adjust to match external pressure conditions. This eliminates sustained tensile stress on the peripheral seal while maintaining hermetic sealing, as the seal only needs to withstand transient pressure differences during equalization rather than continuous static stress.
3Adaptability or versatility
If a pressure adjustment feature is added to the insulating glass unit, then pressure equalization is enabled, but the device complexity increases
Solution Approach 1:
The patent merges the pressure equalization valve with the existing spacer structure, integrating the pressure adjustment functionality into the component that already defines the gas space boundaries. This integration minimizes additional complexity by combining multiple functions (spacing, sealing, and pressure equalization) into a unified structure rather than adding separate components.
Solution Approach 2:
The spacer structure is designed to serve multiple functions: maintaining glass pane spacing, providing hermetic sealing, and incorporating the pressure equalization valve. This multi-functionality reduces overall device complexity by eliminating the need for separate components for each 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
This solution maintains the aesthetic appearance and structural integrity of the insulating glass units by equalizing gas pressure with ambient pressure, preventing bowing and seal stress.
Implementation Method 1
the pressure of the insulative gas to be adjusted (increased and/or decreased) after initial fabrication of the insulating glass unit... to adjust the gas pressure from ambient pressure at the location of manufacture to the ambient pressure at a target elevation
Data Source
AI summary
Insulating glass units and techniques for manufacturing insulating glass units are described. In some examples, a manufacturing technique involves filling a between-pane space located between a first glass pane and a second glass pane of an insulating glass unit with an insulative gas to ambient pressure at the location where the insulating glass unit is manufactured. The insulating glass unit can include one or more features allowing the pressure of the insulative gas to be adjusted (increased and/or decreased) after initial fabrication of the insulating glass unit. For example, the insulating glass unit can include one or more features allowing the pressure of the insulating gas to be adjusted from ambient pressure at the location of manufacture to a different ambient pressure corresponding to an elevation where the insulating glass unit is intended to be delivered and installed in a building.