Multilayer Mist Generator Using Nested Droplets for Extended Dwell Time
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Solution Overview
Problem
Conventional mist-generating devices produce fine mists that vaporize quickly, limiting their dwell time in the air, and require precise control of flow rates for generating multilayer mists.
Innovation Solution
A mist-generating device that uses a droplet generating unit to create a functional droplet with a spherical first liquid covered by a less volatile second liquid, which is then atomized to produce a multilayer mist with extended air presence, utilizing a simple configuration and electrostatic atomization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If fine mist is generated by electrolysis and electrostatic atomization, then the mist can be produced with disinfection effect, but the mist vaporizes quickly and dwells in the air for a short time
Solution Approach 1:
The invention uses a multilayer droplet structure where an inner liquid (containing disinfectant) is nested within an outer liquid (with lower volatility). This nested configuration allows the volatile outer layer to evaporate slowly, extending the dwell time of the mist in air, while the inner liquid maintains its disinfection function. The outer liquid acts as a protective shell that controls the evaporation rate of the inner functional liquid.
Solution Approach 2:
The invention employs composite liquid structures combining multiple liquids with different volatility characteristics. The outer liquid has lower volatility to extend air residence time, while the inner liquid provides the desired functional effect (disinfection). This composite approach allows simultaneous achievement of extended dwell time and functional effectiveness.
2Shape
If multilayer mist is generated using concentric tubes with precise flow rate control, then the multilayer structure can be formed, but the device complexity and control difficulty increase
Solution Approach 1:
The invention utilizes the natural immiscibility and density differences between liquids to achieve self-segregation into layers. When liquids are ejected from the nozzle, they automatically form layered structures based on their physical properties without requiring complex flow rate control systems. The system leverages inherent liquid behavior to create the desired multilayer configuration.
Solution Approach 2:
Instead of using complex concentric tube structures with multiple nozzles requiring precise flow control, the invention inverts the approach by using a single nozzle that ejects liquids which then self-organize into layers in the air. This simplifies the nozzle structure while achieving the same multilayer droplet outcome.
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 device generates a multilayer mist that floats longer in the air without the need for precise flow rate control, effectively extending its dwell time and improving distribution.
Implementation Method 1
a functional droplet including a first liquid that is spherical and a second liquid that covers an entirety of the first liquid
Implementation Method 2
atomizing the generated electrolyzed water by electrostatic atomization by applying a high voltage to the electrolyzed water with a discharging electrode
Implementation Method 3
a second liquid that covers an entirety of the first liquid and has a volatility lower than a volatility of the first liquid
Data Source
AI summary
A mist-generating device includes: a droplet generating unit that generates, in a third liquid, a functional droplet including a first liquid that is spherical and a second liquid that covers an entirety of the first liquid and has a volatility lower than a volatility of the first liquid; and a mist-generating unit that generates a multilayer mist obtained by atomizing the third liquid containing the functional droplet.