Insulating Glass Unit Pressure Adjustment for Pane Flatness
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Solution Overview
Problem
Insulating glass units experience optical distortion and seal stress due to pressure differences between the location of manufacture and the location of use, causing glass panes to bow and potentially weaken the seal.
Innovation Solution
The insulating glass units are configured with features such as a septum or valve that allow adjustment of gas pressure after fabrication to match the ambient pressure at the installation location, or include a temporary seal that can be opened to equalize pressure with the ambient environment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the insulating glass unit is filled with insulating gas at ambient pressure at the location of manufacture, then the gas filling process is simple and cost-effective, but the glass panes may bow and optical distortion occurs when transported to locations with different ambient pressure
Solution Approach 1:
The patent applies parameter changes by adjusting the gas pressure inside the insulating glass unit to match the ambient pressure at the installation location. The system includes a pressure adjustment mechanism that modifies the internal gas pressure parameter based on the elevation or ambient pressure conditions where the unit will be installed, thereby preventing glass pane bowing and maintaining optical quality without complicating the manufacturing process
Solution Approach 2:
The patent implements dynamics by providing an adjustable pressure system that can adapt the internal gas pressure to different operating conditions. The system allows the insulating glass unit to dynamically adjust its internal pressure state to match varying ambient pressure conditions at different locations, transforming a static sealed unit into one that can respond to environmental changes
2Shape
If the gas pressure inside the insulating glass unit is increased to compensate for high elevation transport, then the glass panes maintain parallel alignment, but the seal experiences increased tensile stress
Solution Approach 1:
The patent applies feedback by implementing a pressure regulation system that monitors and adjusts the internal gas pressure to match the ambient pressure at the installation location. This feedback mechanism ensures that the pressure differential across the seal remains minimal, maintaining glass pane alignment while protecting the seal from excessive tensile stress by continuously adapting the internal pressure to external conditions
3Adaptability or versatility
If a pressure adjustment mechanism is added to the insulating glass unit, then the unit can accommodate different ambient pressures at various locations, but the device complexity increases
Solution Approach 1:
The patent applies the extraction principle by removing or minimizing the complexity of the pressure adjustment mechanism. The system uses a simple, integrated design where the pressure adjustment functionality is achieved through a straightforward mechanism that can be easily incorporated into the existing insulating glass unit structure, avoiding unnecessary complexity while maintaining adaptability to different ambient pressures
Solution Approach 2:
The patent implements self-service by designing a pressure adjustment system that automatically equalizes the internal gas pressure with the ambient pressure at the installation location. The mechanism operates autonomously or with minimal intervention, allowing the insulating glass unit to self-adjust to different environmental conditions without requiring complex external control systems or frequent manual adjustments
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 glass panes in parallel alignment, preserving the aesthetic appearance and structural integrity of the insulating glass unit by balancing internal gas pressure with ambient pressure.
Implementation Method 1
the gas sealed inside the insulating glass unit is often at the same pressure as the surrounding atmosphere... the pressure inside the insulating glass unit may vary meaningfully from the ambient pressure at the point of use... the glass panes of the insulating glass unit may bow outward
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.