Ozone Generator Electrode Projection Gap Control
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Solution Overview
Problem
Conventional ozone generating apparatuses face challenges in maintaining a consistent discharge gap length less than 0.6 mm, leading to reduced ozone generation efficiency due to the structural limitations of sheet metal spacers and bent electrodes, which hinder the achievement of optimal ozone yield.
Innovation Solution
The apparatus employs a cylindrical low-voltage electrode coaxially arranged with a cylindrical high-voltage electrode, featuring a projection group on the metal electrode to maintain a consistent discharge gap length of 0.3 to 0.5 mm, ensuring coaxial alignment and optimizing the arrangement of projections to minimize deviation and friction, thereby enhancing ozone yield.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a sheet metal spacer is used to form the discharge gap, then the discharge gap can be formed, but the discharge gap length cannot be maintained consistently due to bending of electrodes and structural limitations
Solution Approach 1:
The spacer is divided into multiple segments along the longitudinal direction, with each segment independently supporting the discharge gap at specific locations. This segmentation allows the spacer to accommodate electrode bending while maintaining consistent gap length at each support point, resolving the contradiction between gap consistency and structural simplicity.
Solution Approach 2:
The spacer segments are pre-positioned at optimal locations along the electrodes before operation. This preliminary positioning ensures that the discharge gap length is maintained at critical sections where electrode bending would otherwise cause inconsistency, achieving precision without complex real-time adjustment mechanisms.
2Productivity
If the discharge gap length is reduced below 0.6 mm to improve ozone yield, then ozone generation efficiency increases, but maintaining a consistent gap length becomes difficult due to structural limitations
Solution Approach 1:
The spacer provides localized support at specific sections along the discharge gap rather than attempting to maintain uniform support throughout. This local quality approach ensures consistent gap length at critical positions where it most impacts ozone yield, while allowing flexibility elsewhere in the structure.
Solution Approach 2:
The segmented spacer structure allows dynamic adaptation to electrode bending and thermal expansion while maintaining the discharge gap length at supported sections. This dynamic capability enables the system to operate with sub-0.6 mm gap lengths consistently, achieving high ozone yield without sacrificing precision.
3Productivity
If the discharge gap length is reduced to improve ozone yield, then theoretical ozone generation values can be surpassed, but frictional forces and alignment deviations increase
Solution Approach 1:
The spacer acts as an intermediary element between the electrodes, providing mechanical support and maintaining the discharge gap length at reduced dimensions. This intermediary structure distributes and reduces frictional forces that would otherwise directly affect the electrode alignment and gap consistency, enabling sustained high-yield operation.
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
This configuration allows for a higher ozone yield and improved efficiency by maintaining a consistent discharge gap, reducing frictional forces, and ensuring effective coaxial alignment, even when the discharge gap length is less than 0.6 mm, thereby surpassing theoretical ozone generation values.
Implementation Method 1
When the AC high voltage is applied, dielectric barrier discharge is generated in the discharge gap and ozone is generated
Implementation Method 2
multiplication of electrons traveling through the discharge gap is represented by a product αd of an ionization coefficient α of the gas
Implementation Method 3
The heat generated by the dielectric barrier discharge is cooled with cooling water supplied into a cooling water flow path formed with the metal electrode and the airtight container
Data Source
AI summary
An ozone generating apparatus includes a cylindrical high-voltage electrode and a coaxially arranged cylindrical low-voltage electrode. A predetermined high voltage is applied between the high-voltage and low-voltage electrodes via a dielectric substance to cause discharge generating ozone, the discharge gap length being 0.3 to 0.5 mm. One of the low-voltage and high-voltage electrodes is a metal electrode and the other a dielectric electrode. A projection group including plural done shape projections, arranged on same circumference of the metal electrode, is arranged on an inner peripheral surface of the metal electrode to hold the metal electrode coaxial with the dielectric electrode while keeping the discharge gap length. The projection group is arranged at a center portion in a longitudinal direction of the discharging space positioned away from both ends of the discharging space by a predetermined distance L3 satisfying, 0.0≦L3/L≦0.1, L being length of the discharging space.