Plasma Actuator Ozone Decomposition for Active Oxygen Sterilization
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Solution Overview
Problem
Existing active oxygen sterilization methods, such as those using UV light and ozone, face limitations in effectively sterilizing all surfaces of an object due to the instability and limited reach of active oxygen species, resulting in sterilization performance comparable to conventional ozone methods rather than leveraging the higher sterilization capability of active oxygen.
Innovation Solution
An active oxygen supply device comprising a housing with a plasma actuator and an ozone decomposing device, where the plasma actuator generates a dielectric barrier discharge to produce ozone, which is then decomposed into active oxygen, ensuring stable and efficient delivery of active oxygen to the object's surface through controlled induced flows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If UV light and ozone are used for sterilization, then sterilization capability is enhanced, but sterilization performance is limited to irradiated portions and shadow areas cannot be effectively treated
Solution Approach 1:
The patent introduces a dielectric material as an intermediary between the plasma actuator electrodes. This dielectric barrier enables the generation of ozone through plasma discharge, which then serves as a mediator to produce active oxygen species that can effectively treat surfaces including shadow portions, resolving the limitation of direct UV irradiation coverage
Solution Approach 2:
The patent replaces the conventional UV light mechanical system with a plasma-based system. Instead of using UV lamps that require line-of-sight irradiation, the system uses a plasma actuator to generate ozone and active oxygen species that can diffuse and treat surfaces more uniformly, including shadow areas
2Reliability
If active oxygen is generated through plasma actuator, then sterilization capability is enhanced, but stability of active oxygen delivery is insufficient
Solution Approach 1:
The patent implements preliminary action by first generating ozone through plasma discharge before the ozone decomposes into active oxygen. The dielectric barrier discharge continuously produces ozone that accumulates and then decomposes to provide stable active oxygen delivery, ensuring consistent sterilization capability over time
Solution Approach 2:
The patent utilizes parameter changes in the plasma discharge process. By controlling the voltage, frequency, and duty cycle of the plasma actuator, the system optimizes ozone generation and decomposition rates, maintaining stable active oxygen concentration for reliable sterilization performance
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 enables reliable and stable treatment of surfaces with active oxygen, enhancing sterilization performance by ensuring active oxygen reaches the treatment area effectively, thereby improving treatment efficiency and coverage compared to conventional methods.
Implementation Method 1
by applying a voltage between the first electrode and the second electrode, the plasma actuator generates a dielectric barrier discharge directed from the first electrode to the second electrode
Implementation Method 2
the ozone decomposing device decomposes the ozone contained in the induced flow to generate active oxygen in the induced flow
Data Source
AI summary
An active oxygen supply device comprising: a housing; a plasma actuator disposed inside the housing; and an ozone decomposing device, wherein the plasma actuator comprises a first electrode, a dielectric material, and a second electrode, the first electrode is an exposed electrode provided on a first surface, which is one surface of the dielectric material, the plasma actuator generates an induced flow containing ozone to be blown out from the first electrode in a first direction, which is one direction along the surface of the dielectric material, the ozone decomposing device decomposes the ozone contained in the induced flow to generate active oxygen, an edge portion of the second electrode leading in a second direction reverse to the first direction is provided with a protruded portion, and overlap the first electrode only in the protruded portion, and the protruded portion has a width constant in the second direction.