Plasma Functional Liquid Device for Sterilization
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Solution Overview
Problem
Existing methods for introducing plasma gas into liquids, such as bubbling, often result in ozone and radicals losing activity due to pressure changes and shear heat, leading to insufficient cleaning and sterilizing effects.
Innovation Solution
A Plasma functional liquid producing device that generates plasma gas with an oxygen concentration of 90% or more, which is introduced into a solvent in a bubbled state using a porous plasma gas releasing section, minimizing heat generation and pressure fluctuations, thereby maintaining active species for effective cleaning and sterilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If plasma gas is introduced into liquid through bubbling using conventional methods (venturi or microporous), then gas dispersion into liquid is achieved, but active species (ozone and radicals) lose their activity due to pressure changes and shear heat
Solution Approach 1:
The invention changes the physical parameters of the bubbling process by controlling bubble size, rising velocity, and residence time. Specifically, it uses fine bubbles (0.1-10mm diameter) with controlled rising velocities (0.01-10mm/s) to minimize shear forces and pressure changes, thereby preserving active species while achieving adequate gas-liquid contact.
Solution Approach 2:
The invention introduces dynamic control of bubble characteristics during the bubbling process. By adjusting bubble generation rate, size distribution, and rise velocity in real-time, the system optimizes the balance between gas dispersion efficiency and active species preservation, making the process adaptive to different plasma gas types and liquid compositions.
2Productivity
If plasma gas is introduced through venturi method with pressure changes, then gas dispersion is enhanced, but active species lose activity due to pressure changes
Solution Approach 1:
The invention eliminates the venturi pressure change mechanism and replaces it with gentle bubbling at atmospheric or near-atmospheric pressure. By changing the pressure parameter from high-variation (venturi) to stable (ambient), the system preserves active species while maintaining gas dispersion through controlled bubble generation and rise.
3Quantity of substance
If plasma gas is introduced through microporous method with shear force, then bubble separation is improved, but active species lose activity due to shear heat
Solution Approach 1:
The invention changes the bubble separation mechanism from shear-force-based (microporous) to buoyancy-based (controlled rise). By using larger fine bubbles with slower rise velocities, the system achieves adequate gas-liquid contact and separation without generating excessive shear heat, thereby preserving active species.
4Reliability
If oxygen concentration in plasma generating gas is increased to 90% or more, then cleaning and sterilizing effects are improved, but device complexity increases
Solution Approach 1:
The invention changes the plasma generating gas composition parameter to high oxygen concentration (90% or more). This parameter change directly enhances the generation of reactive oxygen species (ozone and radicals) which provide superior cleaning and sterilizing effects, while the complexity is managed through standard oxygen generation technologies.
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 produces a plasma functional liquid with long-life active species that achieves excellent cleaning and sterilizing effects without excessive heat or pressure issues, suitable for plant growth and industrial applications.
Implementation Method 1
a plasma gas generating section that generates plasma gas containing active species from plasma generating gas
Implementation Method 2
a plasma gas releasing section that releases the plasma gas in a bubbled state
Data Source
AI summary
A Plasma functional liquid producing device, a method thereof, and a plant factory that exhibit excellent cleaning and sterilizing effects even when plasma gas is introduced into a liquid through bubbling. The Plasma functional liquid producing device comprises a plasma head that generates plasma gas containing active species from plasma generating gas, a plasma gas releasing section that releases the plasma gas in a bubbled state, and a Plasma functional liquid generating section equipped with a plasma functional liquid generating tank storing a solvent, which generates a plasma functional liquid by introducing the plasma gas in the bubbled state into the solvent, wherein the oxygen concentration of the plasma generating gas is preferably 90% or more.