Water Vapor-Selective Membrane Dehumidification for Electronics
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Solution Overview
Problem
Current methods for maintaining a dry environment in electronic enclosures are inefficient and costly, as they either rely on simple moisture heating or desiccants that are non-reusable or energy-intensive, failing to effectively address humidity issues within the enclosure.
Innovation Solution
The use of water vapor-selective membranes, either with a compressor/pump or Joule heating, to actively dehumidify the enclosure by creating a pressure gradient or increasing water vapor partial pressure, allowing for efficient and energy-saving humidity control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If simple moisture heating devices are used to prevent condensation, then condensation protection is achieved, but energy consumption increases and the underlying humidity issue is not addressed
Solution Approach 1:
The patent extracts water vapor from the enclosure environment using a selective membrane that allows water vapor to pass through while blocking other gases. This removes the harmful humidity at its source rather than merely heating to prevent condensation, thereby reducing energy consumption while maintaining condensation protection.
Solution Approach 2:
The patent changes the approach from temperature-based condensation prevention to humidity-based active removal. By using a membrane with specific permeability characteristics, the system actively removes water vapor molecules from the enclosure, fundamentally changing the parameter being controlled from temperature to absolute humidity.
2Object-affected harmful factors
If simple moisture heating devices are used, then condensation is prevented, but the underlying humidity issue remains unaddressed
Solution Approach 1:
The system extracts water vapor molecules selectively through a membrane, directly addressing the underlying humidity issue rather than just preventing its harmful effects. This extraction approach ensures both condensation protection and effective humidity control by removing the moisture source.
3Productivity
If water vapor-selective membranes with compressor/pump are used, then dehumidification efficiency increases, but device complexity increases
Solution Approach 1:
The patent introduces a water vapor-selective membrane as an intermediary component that facilitates selective water vapor removal. The membrane acts as a mediator between the enclosure interior and exterior, enabling efficient dehumidification through its selective permeability properties while working in conjunction with the compressor/pump system.
4Use of energy by moving object
If water vapor-selective membranes are used, then energy efficiency improves, but device complexity increases
Solution Approach 1:
The water vapor-selective membrane serves as an intermediary that enables energy-efficient operation by selectively allowing water vapor passage while blocking other gases. This intermediary component facilitates passive or low-energy dehumidification processes, improving overall energy efficiency despite adding a membrane element to the system.
Solution Approach 2:
The patent changes the operational parameters by introducing a membrane with specific permeability characteristics, transitioning from conventional high-energy dehumidification methods to a more energy-efficient approach that exploits the membrane's selective transport properties.
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 approach provides effective and energy-efficient dehumidification, reducing humidity levels within the enclosure while being cost-effective and avoiding damage to electronic components, with the option to operate cyclically and on demand, addressing the underlying issue of variable humidity.
Implementation Method 1
Water vapor-selective membranes, which allow water vapor to pass therethrough while blocking the passage of air
Implementation Method 2
a compressor/pump is used to induce the dehumidification driving force
Implementation Method 3
a novel Joule heating design is used
Data Source
AI summary
An enclosure for housing electronics, including a housing portion defining an inner volume, an aperture formed through the housing portion, and a water selective membrane operationally connected to the aperture and positioned to selectively pass water molecules from the inner volume to an oppositely disposed exterior environment to maintain dried air within the inner volume. The enclosure of may further include an electronics package disposed within the inner volume, a Joule heater disposed within the inner volume, a pump operationally connected to the inner volume to urge water molecules across the membrane, a sensor operationally connected to the inner volume, and/or a microprocessor operationally connected to the sensor, to the pump, and/or to the Joule heater.