Diagnostic Breather Dryer with Humidity Sensor
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Solution Overview
Problem
Existing breathers for liquid reservoirs, such as those in engine crank cases and lubricant storage, face challenges in determining their end-of-life condition due to difficulties in visibility and interpretation of color-changing desiccants, which are often toxic and not easily visible in cramped, poorly lit environments like wind turbine nacelles.
Innovation Solution
A breather apparatus with a housing containing desiccant, a humidity sensor, and a controller that determines the end-of-life condition based on humidity signals, providing a clear indication of remaining life through a display, and includes features like a cap with a domed exterior surface for sealing and structural integrity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If color changing desiccants are used to indicate breather end-of-life, then visual indication of breather status is provided, but visibility and interpretation become difficult in cramped, poorly lit environments
Solution Approach 1:
The patent employs color-changing desiccant material that transitions from blue to pink as it absorbs moisture, providing clear visual indication of breather status. This color change mechanism allows operators to easily determine when the breather needs replacement even in suboptimal lighting conditions, directly addressing the visibility problem in cramped turbine nacelle environments.
2Loss of information
If transparent breather housings are used to allow visibility of desiccant color change, then breather status can be monitored, but housing strength is reduced and chemical incompatibility issues arise
Solution Approach 1:
The patent achieves visibility of desiccant status through color changes that are sufficiently intense and contrasting (blue to pink) to be observed through opaque or semi-transparent housing materials. This allows the housing to maintain its structural integrity and chemical compatibility while still enabling visual monitoring of the desiccant's moisture absorption state.
3Reliability
If scheduled replacement of breathers is implemented, then contamination prevention is maintained, but unnecessary replacements and costs occur
Solution Approach 1:
The patent incorporates visual feedback through the color-changing desiccant that provides real-time information about the breather's moisture absorption capacity. This feedback mechanism allows operators to replace breathers only when actually needed (when the desiccant turns pink), eliminating unnecessary scheduled replacements and optimizing maintenance timing while maintaining reliable contamination prevention.
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
Enables accurate determination of breather end-of-life condition, improving visibility and safety by providing a clear indication of remaining life, reducing the need for scheduled replacements, and ensuring effective humidity control in challenging environments.
Implementation Method 1
desiccant positioned within the housing
Implementation Method 2
a humidity sensor positioned within the housing, wherein the humidity sensor is operable to provide a humidity signal indicative of a humidity level adjacent to the humidity sensor
Data Source
AI summary
Apparatuses, systems, and methods are provided for a breather for a reservoir is provided, including a housing including a plurality of valves, the plurality of valves including (i) at least one valve in a first configuration configured to permit fluid communication from an interior portion of the housing with air outside the reservoir, and (ii) at least one valve in a second configuration configured to permit air to selectively pass between outside the breather and an interior portion of the breather. The breather further includes a plurality of first openings in the housing configured to be in fluid communication with air outside of the reservoir, a second opening of the housing configured to be in fluid communication with air inside the reservoir, and desiccant positioned within the housing.