Accelerated Weathering Device for Insulating Glass Units
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Solution Overview
Problem
Current accelerated weathering devices for testing insulating glass units are inefficient due to lack of precision in simulating real-life environmental conditions, requiring long test times, high operational costs, and complexity, making it difficult to accurately evaluate changes and perform quality assurance.
Innovation Solution
An accelerated weathering device system that rapidly cycles air pressure, temperature, and humidity, combined with UV radiation exposure, to simulate in-service conditions, allowing for rapid testing of insulating glass units in approximately 2-3 weeks, with a calibration method to compare degradation rates and real-world performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional accelerated weathering devices are used to test insulating glass units, then the test can simulate environmental conditions, but the testing time is excessively long (up to six months or more) and the precision of environmental simulation is insufficient
Solution Approach 1:
The patent implements rapid cyclic pressure changes (e.g., ±30 psi at 60 cycles per hour) combined with temperature and humidity cycling to accelerate weathering effects. This periodic action compresses time while maintaining simulation fidelity, reducing test duration from months to weeks without sacrificing precision.
Solution Approach 2:
The system dynamically adjusts multiple environmental parameters (pressure, temperature, humidity, UV exposure) simultaneously to create accelerated weathering conditions. By changing parameters more intensely and in coordinated cycles, the system achieves faster degradation rates while maintaining realistic simulation of real-world environmental interactions.
2Productivity
If rapid cycling of air pressure is implemented to reduce testing time, then the testing speed increases, but the precision of chamber environment control decreases
Solution Approach 1:
The system incorporates sensors and control systems that continuously monitor pressure, temperature, and humidity levels, adjusting parameters in real-time to maintain precision during rapid cycling. This feedback mechanism ensures that even at high cycling rates (60 cycles per hour), the environmental conditions remain tightly controlled and repeatable.
Solution Approach 2:
The patent transitions from static environmental chambers to dynamically adjustable systems that can rapidly change pressure, temperature, and humidity levels. This dynamic capability allows the system to achieve both high productivity through rapid parameter changes and high precision through controlled, repeatable cycling patterns.
3Adaptability or versatility
If multiple testing chambers are used to conduct comprehensive weathering tests, then the scope of environmental simulation increases, but the device complexity and operational cost increase
Solution Approach 1:
The patent designs a single multi-functional chamber that can simultaneously control pressure, temperature, humidity, and UV exposure. This universal chamber replaces multiple specialized chambers, reducing system complexity while maintaining the ability to simulate comprehensive environmental conditions through coordinated parameter cycling.
Solution Approach 2:
The system merges multiple environmental control functions (pressure regulation, temperature control, humidity management, UV lighting) into a single integrated chamber system. By combining these functions, the patent reduces the number of separate chambers needed while achieving the same or greater simulation capability through coordinated operation of multiple parameters within one chamber.
4Ease of operation
If traditional test methods with slow temperature cycling are used, then the test conditions are stable and easy to control, but the testing duration becomes excessively long
Solution Approach 1:
The system employs rapid periodic cycling of temperature, pressure, and humidity parameters (e.g., 60 cycles per hour) to accelerate weathering while maintaining controlled conditions. This periodic action creates predictable, repeatable patterns that are easy to program and monitor, reducing test time from months to weeks without sacrificing operational simplicity.
Solution Approach 2:
The patent implements simultaneous changes in multiple parameters (temperature, pressure, humidity, UV intensity) at accelerated rates. By coordinating these parameter changes in predetermined cycles, the system achieves fast testing while maintaining ease of operation through automated control programs that manage the complexity of multiple changing variables.
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 system significantly reduces testing time, improves precision, and allows for effective quality assurance, enabling fabricators to evaluate changes quickly and confidently, while maintaining a high degree of control over environmental conditions.
Implementation Method 1
rapid cycling of air pressure (e.g., every minute) to simulate stresses on or in the test samples due to wind, atmospheric changes, and/or the effects of temperature on air sealed assemblies
Implementation Method 2
exposes the test samples (e.g., IGUs) to ultraviolet light radiation (e.g., in cycles) to simulate the effect of UV radiation on the test samples
Implementation Method 3
exposes the test samples (e.g., IGUs) to cycles in humidity to simulate the effect of different temperatures and humidity levels on the test samples
Data Source
AI summary
An accelerated weathering device, system and method is provided for rapidly weather testing insulating glass units (IGUs). The accelerated weathering system can include an air sealed vessel that can removably house an IGU, an air flow system in fluid communication with a chamber in the vessel, the air flow system operable to increase or decrease a pressure in the chamber, an exchanger system in communication with the chamber and operable to increase or decrease one or both of a temperature and a humidity level of the chamber, one or more UV bulbs, and a computer system operable to control the air flow system and exchanger system to vary one or more of the following parameters in the chamber: temperature, relative humidity, and pressure.