Volatile Dispenser Aperture Design for Membrane Exposure
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Solution Overview
Problem
Existing non-energized devices for dispensing volatile compositions, such as fragrances, struggle to provide a continuous and heightened delivery of volatile materials while maintaining effective containment and aesthetic safety, as they do not adequately increase the exposure of the membrane to the environment.
Innovation Solution
A volatile composition dispenser with a housing design featuring opposing walls with specific apertures and a gap between the cartridge and the housing bottom, allowing for increased membrane exposure, with at least 60% of the aperture surface area having an aspect ratio of greater than 1:2, promoting convective air flow and extended volatile composition release.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the membrane exposure to the environment is increased to achieve heightened volatile composition delivery, then the productivity of volatile material delivery is improved, but the containment safety and aesthetic appearance deteriorate
Solution Approach 1:
The housing is segmented into multiple functional walls (first wall with activation button, second wall with plurality of apertures, third wall as back wall, fourth wall as front wall) that collectively manage both exposure and containment. The apertures are segmented into multiple individual openings, each contributing to the total exposure area while maintaining structural integrity and safety containment.
Solution Approach 2:
Different walls of the housing have different local qualities optimized for their specific functions: the second wall has multiple apertures for maximum exposure, the first wall has a sealed activation button area for controlled activation, the third wall provides structural back support, and the fourth wall offers front protection. This localized optimization allows the system to achieve high productivity where needed while maintaining safety where required.
2Duration of action of moving object
If the membrane exposure to the environment is increased to achieve extended volatile composition release, then the duration of action is improved, but the device complexity increases due to housing design requirements
Solution Approach 1:
The housing structure serves multiple functions simultaneously: it provides structural containment for safety, creates controlled exposure through apertures for extended release duration, supports the activation mechanism, and maintains aesthetic appearance. This multi-functionality reduces the need for additional separate components, thereby managing complexity while achieving extended duration of action.
Solution Approach 2:
The volatile composition cartridge is nested within the housing structure, with the membrane positioned inside the aperture-containing walls. The activation button mechanism is nested within the first wall structure. This nested arrangement allows compact integration of multiple functional elements without significantly increasing overall device complexity, while the aperture design enables extended volatile release duration.
3Productivity
If apertures with high aspect ratio are used to promote convective air flow, then the productivity of volatile delivery is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The aperture design specifies particular geometric parameters (aspect ratio greater than 1:2, minimum area of 30 mm² per aperture, minimum of 60% of total wall area covered by apertures) that optimize convective air flow for high productivity. These parameter specifications provide clear manufacturing targets that balance performance optimization with manufacturability, avoiding excessively tight tolerances while achieving the desired flow characteristics.
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 dispenser achieves a 70% to 90% weight loss of the volatile composition over 30 days, offering consistent and prolonged exposure to the environment while maintaining user safety and aesthetic appeal.
Implementation Method 1
a membrane of a certain porosity and thickness wherein when the element is actuated causing the breach of the substrate which in turn causes the material to cross to the membrane for diffusion to the atmosphere
Implementation Method 2
a housing design featuring opposing walls with specific apertures and a gap between the cartridge and the housing bottom, allowing for increased membrane exposure, with at least 60% of the aperture surface area having an aspect ratio of greater than 1:2, promoting convective air flow and extended volatile composition release
Data Source
AI summary
A volatile composition dispenser includes a housing having an aperture and having opposing first and second walls that are joined along their peripheries to one another, where said second wall has a plurality of apertures; a volatile composition cartridge disposed within the housing between said first and second walls; and a gap, which exists between said volatile composition cartridge and a bottom surface of the housing, wherein said bottom surface is formed from a base portion of one or both of the first and second walls. Upon activation, the exposure percentage is greater than 40%.