Multi Pulse Linear Ionizer Reduces Ozone Emission
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Solution Overview
Problem
AC corona ionizers face challenges with high ozone emission and electrode contamination, which affect ionization efficiency and balance, necessitating a solution for low ozone emission and reduced emitter contamination.
Innovation Solution
The use of very low power, high ionization efficiency is achieved through micro-second wide pulses in a resonant circuit, with a flyback type generator producing voltage waves with three peaks, and a method that includes short pulse duration to generate ions without ozone and nitrogen oxides, along with simultaneous voltage application to linear wire emitters for balanced ion distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If AC corona ionizers use continuous high voltage to achieve sufficient ionization, then ionization efficiency is improved, but ozone emission and electrode contamination increase
Solution Approach 1:
The patent applies periodic pulsed voltage instead of continuous voltage to the ion emitter. The pulsed voltage is applied in short bursts at specific frequencies, creating ions only during the pulse periods. This periodic action maintains sufficient ionization efficiency while reducing overall ozone generation and electrode contamination compared to continuous high voltage application.
Solution Approach 2:
The patent changes the voltage parameters by using high-voltage pulses with specific characteristics (amplitude, duration, frequency, duty cycle) rather than continuous voltage. By optimizing these pulse parameters, the system achieves effective ionization while minimizing harmful byproducts. The pulse width and frequency are specifically tuned to produce ions without excessive ozone generation.
2Quantity of substance
If AC corona ionizers use continuous high voltage for ionization, then ion generation is sufficient, but electrode contamination and wear increase
Solution Approach 1:
The pulsed voltage application limits the time during which corona discharge occurs, reducing the accumulation of contaminants on the electrode surface. The periodic on-off cycles allow brief intervals where ion generation occurs without continuous particle deposition, thereby maintaining ion quantity while reducing electrode contamination.
Solution Approach 2:
The short-duration voltage pulses rush through the ionization process quickly, generating sufficient ions in brief bursts before contaminants can significantly accumulate on the electrode. This rapid pulsed action completes ion generation faster than contamination can build up, maintaining ion quantity while minimizing electrode degradation.
3Productivity
If AC corona ionizers use high power continuous voltage, then ionization efficiency is high, but energy consumption and heat generation increase
Solution Approach 1:
The pulsed voltage system delivers high power only during brief pulse durations rather than continuously. The duty cycle (ratio of pulse on-time to total period) is optimized to provide sufficient ionization during pulses while allowing energy recovery or reduced consumption during off-periods, thereby improving overall energy efficiency while maintaining ionization performance.
Solution Approach 2:
The patent optimizes pulse parameters including amplitude, width, frequency, and duty cycle to achieve maximum ionization efficiency at minimum energy consumption. By carefully tuning these parameters, the system delivers just enough energy during each pulse to generate required ions without excessive power consumption or heat generation.
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 approach significantly reduces ozone generation, particle collection on emitters, and maintains ion balance, while providing efficient and low-maintenance ionization with reduced wear and contamination, achieving 3 to 5 times less ozone emission at equal charge neutralization efficiency.
Implementation Method 1
A flyback type generator produces such waves naturally in a resonant circuit
Implementation Method 2
A flyback type generator produces such waves naturally in a resonant circuit
Implementation Method 3
AC corona ionizers are commonly used for static charge neutralization of charged objects
Implementation Method 4
an applied power is enough (or sufficient) for a corona discharge to generate positive and negative ions
Data Source
AI summary
An embodiment of the invention provides a method for generating ions within a space separating an emitter and a reference electrode, the method comprising: generating a variable number of small sharp pulses and rate of the pulses depending on the distance of the target from the emitter.