Ion Generation Circuit Timing to Prevent Ion Recombination
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Solution Overview
Problem
Ion generating apparatuses face a decrease in concentration of positive and negative ions due to recombination, as they simultaneously generate both ions using a resonance circuit that produces a ringing voltage waveform.
Innovation Solution
An ion generating apparatus with a controller that applies a positive voltage with a removed negative peak to the positive ion generating electrode pair and a negative voltage with a removed positive peak to the negative ion generating electrode pair in different periods, alternately generating ions to reduce recombination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If both positive and negative ions are generated simultaneously using a resonance circuit, then the ion generating apparatus can produce both types of ions, but the concentration of ions decreases due to recombination
Solution Approach 1:
The ion generating apparatus alternates between generating positive ions and negative ions in periodic time slots. The controller switches the resonance circuit between positive voltage mode and negative voltage mode, creating periodic action that prevents simultaneous presence of both ion types, thereby reducing recombination while maintaining the ability to generate both ion types over time
2Productivity
If a ringing voltage waveform is used to generate ions, then both positive and negative ions can be produced, but recombination occurs reducing the effective ion concentration
Solution Approach 1:
The controller divides the ringing voltage waveform application into periodic time slots, applying positive voltage during one period and negative voltage during another period. This periodic switching maintains high ion generation capability while ensuring that positive and negative ions are generated at different times, preventing recombination and maintaining high ion concentration
Solution Approach 2:
The ion generation process is segmented into separate time periods for positive ion generation and negative ion generation. By segmenting the operation into distinct time slots rather than simultaneous operation, the system maintains productivity while eliminating the recombination problem that occurs when both ion types are present together
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 effectively reduces the decrease in concentration of positive and negative ions in the air by preventing their recombination, maintaining a higher ion concentration.
Implementation Method 1
an ion generating circuit that generates both positive ions and negative ions
Implementation Method 2
a resonance circuit that generates a ringing voltage waveform
Data Source
AI summary
An ion generating apparatus, comprising: an ion generating circuit including a positive ion generating electrode pair and a negative ion generating electrode pair; and a controller configured to control the ion generating circuit, wherein the controller causes the ion generating circuit to apply a positive voltage to the positive ion generating electrode pair and a negative voltage to the negative ion generating electrode pair in different periods, the positive voltage having a waveform that is a first ringing voltage waveform a negative peak of which is removed, and the negative voltage having a waveform that is a second ringing voltage waveform a positive peak of which is removed.