Breathing Circuit Dry-Gas Moisture Transfer for Condensation Control
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Solution Overview
Problem
Existing breathing circuits face challenges in efficiently managing moisture and condensation, including the need for manual monitoring, potential device damage, and limited capacity for moisture removal, especially when using heated wires or permeable membranes.
Innovation Solution
A moisture removal and condensation management apparatus is introduced, featuring a breathing circuit tubing with a dry gas conduit adjacent to a breathing gas conduit, utilizing a moisture transmission pathway through permeable portions or perforations to transfer moisture from the breathing gas to the dry gas conduit, which is maintained at a lower humidity level.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a heating wire is provided along the length of the tube to prevent condensation, then condensation is prevented, but the manufacture becomes time consuming and costly
Solution Approach 1:
The invention extracts the heating function from a separate heating wire and integrates it into the tubing wall structure itself through electrically conductive layers, eliminating the need for separate heating elements and reducing manufacturing complexity
Solution Approach 2:
The invention merges the structural tubing function with the heating function by incorporating electrically conductive layers directly into the tubing wall, combining two separate functions into a single integrated component
2Quantity of substance
If a removable container is used to trap condensed water vapor, then moisture collection is achieved, but the device requires manual monitoring and emptying, causing risk of infection
Solution Approach 1:
The invention enables self-service operation through an automatic drainage system that uses hydrophobic membranes and capillary pressure to automatically drain condensed water vapor without requiring manual monitoring or emptying, eliminating infection risks
Solution Approach 2:
The invention replaces manual mechanical emptying operations with an automatic passive drainage system based on hydrophobic membrane properties and capillary pressure differentials, eliminating the need for human intervention
3Quantity of substance
If a permeable membrane is used to dissipate moisture to ambient air, then moisture removal is achieved, but the membrane can be easily punctured or damaged
Solution Approach 1:
The invention applies local quality by using hydrophobic membrane properties selectively in specific regions where condensation occurs, rather than requiring a complete permeable membrane covering, thereby reducing vulnerability to damage
Solution Approach 2:
The invention provides beforehand cushioning by designing the hydrophobic membrane system to tolerate and self-heal from minor punctures through the formation of liquid bridges that maintain functionality even when the membrane is compromised
4Quantity of substance
If a permeable membrane is used for moisture dissipation, then moisture can pass through, but the capacity is limited due to high ambient humidity
Solution Approach 1:
The invention applies inversion by reversing the traditional approach of passive diffusion and using active capillary pressure differentials driven by hydrophobic membrane properties to force moisture transmission, thereby increasing removal capacity regardless of ambient humidity conditions
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 apparatus automatically manages moisture and condensation without manual intervention, protects against device damage, and enhances moisture removal capacity, ensuring effective humidity control in breathing circuits.
Implementation Method 1
a permeable membrane which forms a portion of the common dividing wall
Implementation Method 2
a permeable membrane which forms a portion of the common dividing wall
Implementation Method 3
a hydrophobic layer disposed adjacent to the permeable membrane and in contact with the breathable gas flow within the conduit
Implementation Method 4
a heater associated with a hydrophilic layer. The wire heats the humidified gas traveling through the tubing
Implementation Method 5
The purpose of the heater is to evaporate any condensed liquid collecting in the conduit
Implementation Method 6
a hydrophilic layer which allows passage of liquid water from the inner conduit to the outer conduit
Data Source
Figure 1~2
Figure 3~4
AI summary
A moisture removal and condensation and humidity management apparatus for a breathing circuit comprises a breathing circuit tubing defining a breathing gas conduit. The breathing gas has a first humidity level and a level of moisture therein. A dry gas conduit is adjacent at least a portion of the breathing gas conduit. The dry gas flow is configured to have a second humidity level lower than the first humidity level. A moisture transmission pathway is provided between the breathing gas conduit and the dry gas conduit, such that humidity in the flow of breathing gas is lowered and moisture is transferred to the dry gas flow. The moisture transmission pathway may be provided by a permeable portion which is permeable to water vapor but impermeable to liquid water, or by one or more perforations which permit drainage of liquid water from the breathing gas conduit to the dry gas conduit.