Modulating Makeup Fluid Control for Stable Humidifier Boiling Rate
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Solution Overview
Problem
Existing systems fail to maintain a consistent boiling rate of fluid in humidifiers due to imprecise measurement of fluid levels, leading to unacceptable variations in humidity levels within environments.
Innovation Solution
A system that measures the fluid level of a turbulated base fluid by determining at least one first height above and one second height below a sensor, allowing for more accurate and precise determination of the fluid level, and introduces additional fluid in a graduated manner using a control valve to maintain the boiling rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If water is introduced into the tank using a float valve or water level sensor, then the water level is controlled, but the boiling rate diminishes due to imprecise fluid level measurement
Solution Approach 1:
The patent segments the fluid level measurement into multiple discrete sensor positions (first sensor above fluid level, second sensor below fluid level) rather than using a single point measurement. This segmentation allows for more precise determination of the actual fluid level by detecting the relationship between multiple sensor positions, thereby resolving the contradiction between measurement precision and maintaining boiling rate.
Solution Approach 2:
The patent implements a feedback control system where the controller continuously monitors the fluid level using multiple sensors and adjusts the makeup water valve accordingly. The controller receives signals from both the first sensor (above fluid level) and second sensor (below fluid level) and modulates the makeup water introduction to maintain the fluid level within the optimal range, preventing diminishment of the boiling rate while ensuring accurate fluid level control.
2Quantity of substance
If water is introduced in large quantities when float or level sensor is triggered, then the water level is restored, but the temperature of base fluid decreases below boiling temperature
Solution Approach 1:
The patent employs a dynamic control approach where the makeup water valve is modulated based on real-time fluid level measurements from multiple sensors. Instead of introducing water in fixed large quantities, the system dynamically adjusts the water introduction rate to match the actual fluid level conditions, thereby restoring water level without causing excessive temperature drop that would prevent boiling.
Solution Approach 2:
The patent changes the control parameter from binary (water added or not) to continuous modulation of water flow rate. The controller adjusts the makeup water valve opening degree based on the fluid level signals from multiple sensors, enabling precise control of water introduction quantity. This parameter change allows restoring water level while maintaining base fluid temperature above boiling point.
3Ease of operation
If a floating level sensor is used, then the water level is detected, but the measurement is inconsistent due to turbulated base fluid
Solution Approach 1:
The patent introduces fixed sensors as intermediary measurement devices that are not affected by fluid turbulence. Instead of using a floating sensor that moves with the turbulated base fluid, the system uses fixed first and second sensors positioned above and below the expected fluid level range. These fixed sensors act as intermediaries to detect fluid level indirectly through electrical contact or proximity sensing, providing consistent and reliable measurements even when the base fluid is turbulated.
Solution Approach 2:
The patent replaces the mechanical floating level sensor with an electrical sensing system. The fixed sensors use electrical fields or circuits to detect fluid level presence, eliminating the mechanical floating component that is susceptible to turbulence. This substitution of mechanical detection with electrical detection methods provides more reliable and consistent water level measurement in the presence of turbulated base fluid.
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 ensures a consistent boiling rate and stable humidity levels by providing a more accurate measurement of fluid levels and controlled introduction of water, preventing sudden changes in steam production.
Implementation Method 1
A fluid level (e.g., an actual fluid level) of a turbulated base fluid is determined in a reservoir by measuring at least one first height and at least one second height of the turbulated base fluid above and below a first sensor, respectively
Implementation Method 2
the method also includes, in at least some examples, graduating the introduction of an input fluid into the reservoir with a control valve
Implementation Method 3
As the heat source heats—and ultimately boils—the water inside of the tank, steam escapes the tank through a steam discharge
Implementation Method 4
As the heat source heats—and ultimately boils—the water inside of the tank
Implementation Method 5
As the heat source heats—and ultimately boils—the water inside of the tank, steam escapes the tank through a steam discharge
Data Source
AI summary
A method for maintaining a boiling rate of a base fluid can include a determination of a fluid level of a turbulated base fluid in a reservoir. The fluid level can be determined by measuring at least one first height of the turbulated base fluid above the fluid level with at least a first sensor. The fluid level can be determined by measuring at least one second height of the turbulated base fluid below the fluid level with the first sensor. The method can include the establishment of the fluid level of the turbulated base fluid. The fluid level can be established according to the measured at least one first and second heights. The method can include the graduated introduction of an input fluid into the reservoir. A control valve can gradually introduce the input fluid in proportion to the established fluid level of the turbulated base fluid.