Humidifier Water Tub Spill Sensing for Electrical Connection Protection
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Solution Overview
Problem
Existing humidification systems for respiratory gases face issues with water spillage, which can lead to corrosion of electrical connections and electrical shorts, compromising the safety and efficacy of the device.
Innovation Solution
Incorporation of conductive sensing elements and water sensors to detect water presence and automatically disconnect power to electrical connections, preventing corrosion and shorts by channeling water away from electrical terminals and using capacitive or amperometric sensing mechanisms to control power delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If water is placed into a tub by a user and the tub is removable, then the humidification system is easier to fill and maintain, but water spillage can occur during handling which may corrode electrical connections or cause electrical shorts
Solution Approach 1:
The patent applies preliminary action by providing spill guidance markings on the tub before the user fills it with water. These markings indicate the safe fill level and proper positioning, allowing the user to correctly position the tub before water is added, thereby preventing spillage during the filling operation while maintaining the ease of removable tub design
Solution Approach 2:
The patent introduces an intermediary element in the form of a spill prevention mechanism that includes a barrier or stop structure within the tub. This intermediary physical feature prevents water from spilling beyond the intended area during handling and insertion, mediating between the ease of removable tub operation and the safety of electrical connections
2Reliability
If water spillage is prevented through careful design, then electrical connections are protected from corrosion, but the device complexity increases due to additional protective mechanisms
Solution Approach 1:
The patent applies segmentation by dividing the tub assembly into distinct functional zones: a water-containing region with spill prevention features, and a separate electrical connection region with protective barriers. This segmentation allows each zone to be optimized independently, protecting electrical connections without requiring complex system-wide protective mechanisms
Solution Approach 2:
The patent extracts the spill prevention function into a separate, dedicated feature within the tub design, such as a barrier wall or stop structure, rather than integrating it into the main electrical connection protection system. This extraction allows the electrical protection system to remain simple while still achieving reliable protection through the dedicated spill containment feature
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 solution effectively protects electrical components from water damage, ensuring the humidification system's reliability and safety by preventing corrosion and electrical failures due to water spillage.
Implementation Method 1
using capacitive or amperometric sensing mechanisms to control power delivery
Implementation Method 2
using capacitive or amperometric sensing mechanisms to control power delivery
Implementation Method 3
a heater for heating said water. In such a configuration, the heater encourages the evaporation of the water
Implementation Method 4
the heater encourages the evaporation of the water, which in turn imbues the stream of air with moisture
Data Source
AI summary
The electrical connections of a chamber or enclosure for a water tub can be protected through the use of spill element sensors. The spill element sensors can help to disable the delivery of power to the heater of a water tub in the event that the electrical connections become wet.