Wick-Based Volatile Dispenser for Consistent Vapor Composition
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Solution Overview
Problem
Volatile material dispensers struggle to maintain a consistent vapor composition over time due to fractionation issues, where more volatile components are emitted in excess initially, altering the fragrance composition and failing to equilibrate with the changing refill composition.
Innovation Solution
A wick-based dispenser system with a porous structure and controlled geometry, airflow, and surface area, which utilizes a Peclet number to optimize fractionation, ensuring the emission of volatile materials in proportions matching the initial composition by balancing flow and diffusion processes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If evaporation is used to disperse volatile materials, then the volatile material is released into the atmosphere, but the more volatile components are emitted in greater proportion than less volatile components, causing the fragrance composition to change over time
Solution Approach 1:
The patent applies parameter changes by controlling the temperature of the heater to regulate the evaporation rate. By adjusting the temperature parameter, the system balances the emission of different volatility components, preventing excessive emission of high volatility components while maintaining adequate release of low volatility components, thus preserving fragrance composition consistency over time.
Solution Approach 2:
The patent implements feedback control by monitoring the fragrance composition and adjusting the heater temperature accordingly. This feedback mechanism detects changes in the ratio of volatile components being emitted and modifies the heating parameter to maintain the intended fragrance character, ensuring that the emission profile remains consistent with the original composition.
2Stability of the object's composition
If fractionation is allowed to occur in the wick, then the concentration of high volatility fragrance components is reduced at the emanating surface, but the process is too slow to be effective, resulting in excessive emission of high volatility components in the first few days
Solution Approach 1:
The patent applies preliminary action by pre-equilibrating the wick with the fragrance composition before actual use. The wick is saturated with the fragrance mixture in advance, allowing the fractionation process to occur during a conditioning period. This preliminary fractionation ensures that when the dispenser is activated, the wick is already prepared to emit components in the correct proportions from the beginning, eliminating the initial excessive emission problem.
3Productivity
If the wick porosity is decreased to increase flow resistance, then the emission rate is reduced, but the fractionation process becomes even slower
Solution Approach 1:
The patent applies parameter changes by optimizing the wick porosity to a specific value that balances flow resistance and fractionation speed. Rather than simply decreasing porosity to reduce emission rate, the patent selects a porosity parameter that provides adequate flow resistance to control emission while maintaining sufficient permeability to allow the fractionation process to occur at an effective rate. This optimized porosity parameter achieves both emission control and timely fractionation.
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 system achieves rapid fractionation, maintaining a consistent vapor composition that matches the initial refill composition, preventing changes in the fragrance composition over time and ensuring a stable output rate.
Implementation Method 1
The wick delivers volatile material to an emanation surface by capillary action
Implementation Method 2
Vapors of the volatile material are generated at the emanation surface as the volatile material is replenished by flow from the bottle
Implementation Method 3
fractionation occurs with sufficient speed to emit the volatile material with a consistent vapor composition... which is a function of: wick geometry, a volatility of fragrance components, and an air flow that disperses a vapor
Data Source
Figure 1~2G
Figure 3A~3C
Figure 4A~4B
AI summary
A system for consistently emitting a volatile material includes a volatile material dispenser having a diffusion element. The system further includes a refill adapted for disposal within the volatile material dispenser and including a container having a volatile material disposed therein and a wick having a first end disposed in contact with the volatile material in the container and a second end extending out of the container. A time constant for (Parameter 4) for the system is greater than 0 and less than or equal to 1.0 hour when estimated using the equation: Predicted mass change = Parameter4 + (Parameter3 * T) + (Parameter2 * exp(-T/Parameter1)).