Fluid Sensor Detects Liquid Depletion in Vaporizer
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Solution Overview
Problem
Existing vapor-generating systems, such as e-cigarettes, continue to operate and produce heated air after the liquid vapor-forming substrate in the storage portion is depleted, leading to an unpleasant user experience and potential release of undesirable products.
Innovation Solution
Incorporating a fluid sensor in the vapor-generating system that measures the electrical resistance of the fluid in the fluid channel, allowing the system to detect the presence or absence of the liquid vapor-forming substrate and deactivate the vaporizer accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the vaporizer continues to operate after liquid depletion, then the system maintains continuous operation, but heated air without vapor is drawn causing unpleasant user experience
Solution Approach 1:
The fluid sensor detects liquid depletion in advance before the liquid is completely consumed, allowing the controller to preemptively deactivate the vaporizer and prevent heated air-only draws. This preliminary detection and response action ensures the system stops operating before producing undesirable vapor-free heated air.
2Productivity
If the vaporizer continues to operate after liquid depletion, then the system maintains continuous operation, but undesirable products are released
Solution Approach 1:
The fluid sensor detects liquid depletion in advance, allowing the controller to preemptively deactivate the vaporizer before heating empty channels that would generate undesirable products. This prevents harmful substances from being produced and released.
Solution Approach 2:
The fluid sensor provides continuous feedback on liquid presence to the controller, enabling real-time monitoring and immediate deactivation when liquid is depleted. This feedback mechanism ensures the vaporizer stops operating before generating harmful vapor-free heated air.
3Reliability
If a fluid sensor is added to detect liquid presence, then liquid depletion can be detected, but device complexity increases
Solution Approach 1:
The patent replaces complex mechanical liquid level sensors with a simple electrical resistance sensor that measures fluid presence through electrical properties. This substitution reduces mechanical complexity while maintaining reliable detection capability.
Solution Approach 2:
The fluid sensor serves multiple functions: detecting liquid presence, determining liquid depletion, and providing feedback for controller decisions. This multi-functionality justifies the added complexity by consolidating multiple detection needs into a single sensor component.
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
Prevents the activation of the vaporizer when the liquid vapor-forming substrate is depleted, thereby avoiding the drawing of heated air only and reducing the formation of undesirable products, enhancing user experience and system efficiency.
Implementation Method 1
measuring an electrical property of a fluid in the fluid channel
Data Source
AI summary
A vapor-generating system includes a pump having an inlet and an outlet, the inlet configured to be connected to a liquid storage portion. The system includes a fluid channel fluidly connected to the pump and a fluid sensor. The fluid sensor is configured to determine a presence of liquid vapor-forming substrate in the fluid channel based on measuring an electrical property of the fluid in the fluid channel.