Ozone Backflow Arrester Venting for Generator Water Intrusion
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Solution Overview
Problem
Existing ozone generators are vulnerable to water backflow, which can cause damage due to high voltage arcs with water, and current backflow prevention methods like check valves and solenoid valves are prone to failure under ozone's oxidative properties.
Innovation Solution
A system incorporating a float switch, water level switch, and vacuum switch with three-way ball valves to detect backflow and automatically vent ozone to the environment, ensuring reliable prevention without immediate shut down, using materials resistant to ozone degradation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If check valves or solenoid valves are used to prevent water backflow, then backflow prevention is achieved, but the valves are prone to failure under ozone's oxidative properties
Solution Approach 1:
The patent introduces a float switch as an intermediary detection mechanism that monitors water levels in the reservoir and triggers valve activation only when backflow is detected, rather than relying on the valve alone to prevent all backflow attempts. This mediator approach reduces the stress and failure risk on the valve components exposed to oxidative ozone environments.
Solution Approach 2:
The system performs preliminary detection using the float switch and vacuum switch before backflow can cause damage. By detecting potential backflow conditions in advance and triggering preventive valve closure or purging mode, the system avoids the need for valves to withstand repeated high-stress backflow events, thereby improving reliability without requiring overly robust (and ozone-vulnerable) valve materials.
2Reliability
If immediate shut down is used to prevent backflow damage, then generator protection is achieved, but system productivity is reduced
Solution Approach 1:
The patent implements dynamic response strategies where the system can operate in different modes: normal operation, purging mode (where the ozone generator continues running but purges the line), or shutdown mode. The float switch and vacuum switch dynamically adjust the system state based on real-time conditions, allowing the generator to remain operational in purging mode rather than immediately shutting down, thus maintaining productivity while still protecting against damage.
Solution Approach 2:
The system changes operational parameters based on detected conditions. When backflow is detected, the system can switch to purging mode where airflow parameters are adjusted to clear the lines, or activate valves to redirect flow paths. These parameter changes allow continuous operation under modified conditions rather than complete shutdown, balancing generator protection with productivity maintenance.
3Reliability
If multiple feedback mechanisms are added to ensure redundancy, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple detection functions into a integrated control system where the float switch and vacuum switch work together with the valve assembly and purging mechanism as a unified backflow prevention system. This merging approach allows the components to support each other's functions, providing redundancy without requiring completely separate independent systems, thereby managing complexity while maintaining high reliability.
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 system effectively prevents water backflow into ozone generators, reducing stress on the generators and minimizing damage by diverting fluid to the atmosphere, ensuring redundancy and reliability through multiple feedback mechanisms.
Implementation Method 1
a float switch in the reservoir
Implementation Method 2
vacuum switch with three-way ball valves to detect backflow
Implementation Method 3
three-way ball valves to detect backflow and automatically vent ozone to the environment
Implementation Method 4
an injector connected to the reservoir via an outtake tube, wherein the injector is operable to inject the ozone into a water stream
Data Source
AI summary
An ozone backflow arrester system includes a reservoir positioned between an ozone generator and a venturi injector or bubbler at the bottom of a water tank. The reservoir includes a float switch configured to detect a volume of backed up fluid in the system. The float switch is able to communicate a signal to a first three-way valve proximal to the reservoir or a second three-way valve distal to the reservoir to block gas or liquid flow through the system. Either three-way valve is able to vent backed up fluid or incoming gas into the surrounding environment through a vent. The float switch is able to work in conjunction with a vacuum switch connected proximate to the venturi injector or an impedance sensor within the reservoir.