Electrostatic Air Filter with Segmented Electrodes
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Solution Overview
Problem
Existing electrostatic air filters for ventilation are inefficient due to high ozone and nitrogen oxide emissions, require complex maintenance, and suffer from air leakage issues, limiting their performance and safety for human use.
Innovation Solution
An electrostatic air filter design featuring a high voltage source with an ion generator and particle separator, where corona discharges occur between corona and cumulative electrodes, and an additional separator with input and output electrodes to enhance particle electrification and filtration efficiency, reducing ozone and nitrogen oxide emissions and simplifying maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If industrial electrostatic precipitators are used for ventilation, then filtration efficiency is improved, but ozone and nitrogen oxide emissions increase
Solution Approach 1:
The device is divided into separate functional modules: an ion generator section with corona and cumulative electrodes, and a particle separator section with input and output electrodes. This segmentation allows the ion generation and particle separation processes to occur in distinct zones, enabling better control over ionization levels and reducing harmful emissions while maintaining filtration efficiency.
Solution Approach 2:
The patent applies different voltage parameters to different sections: high voltage for ion generation in the ion generator section, and controlled voltage for particle separation in the particle separator section. This parameter differentiation optimizes the balance between filtration performance and harmful emissions by avoiding excessive ionization in any single location.
2Reliability
If strong ionisation is applied to achieve successful filtration, then filtration efficiency is improved, but harmful gas emission increases
Solution Approach 1:
The cumulative electrodes act as intermediaries between the corona electrodes and the particle separator. They receive ions from the corona discharge and transfer them to the particle separator, enabling gradual ionization rather than direct strong ionization, thus reducing harmful gas emission while maintaining filtration efficiency.
Solution Approach 2:
The patent creates a continuous ionization process where corona electrodes continuously generate ions that are progressively transferred through cumulative electrodes to the particle separator. This continuous action ensures sustained filtration efficiency while distributing the ionization load over time and space, reducing peak harmful emissions.
3Reliability
If numerous metal elements are used in electrostatic precipitators, then filtration capability is improved, but maintenance complexity increases
Solution Approach 1:
The device is segmented into modular sections with clearly defined functional areas. The ion generator and particle separator are separate removable units, each with limited metal elements. This modular segmentation simplifies maintenance by allowing individual sections to be serviced independently without disassembling the entire device.
Solution Approach 2:
The patent extracts and isolates the ion generation function in a separate ion generator section that can be removed for maintenance. This separation allows the metal elements in the ion generator to be cleaned or replaced without affecting the particle separator, reducing overall maintenance complexity while preserving filtration capability.
4Reliability
If filter performance is maximized, then filtration efficiency is improved, but air leakage increases
Solution Approach 1:
The patent employs a pre-filter layer that can be easily replaced when dirty. This disposable or periodically-replaced element creates a tight seal and prevents air leakage without requiring complex sealing mechanisms in the main filtration path, allowing maximum filtration efficiency while minimizing air leakage issues.
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 filter achieves high filtration efficiency (>99.97%) with reduced ozone emission and lower energy consumption, while minimizing maintenance needs and preventing air leakage, ensuring safer and more effective air purification.
Implementation Method 1
corona discharges may occur between the corona electrodes and cumulative electrodes due to a potential difference, the corona discharges causing ionisation of contaminant particles present in the air flowing through the channel
Implementation Method 2
the corona discharges causing ionisation of contaminant particles present in the air flowing through the channel
Implementation Method 3
the electric field strength in the space between the input electrode and the output electrode is directed opposite to the electric field strength in the space between the ion generator and the input electrode
Data Source
AI summary
An electrostatic air filter connected to a high voltage source, including an air flow channel, an ion generator, at least one corona electrode and at least one cumulative electrode, the corona electrodes and the cumulative electrodes are configured so that corona discharges occur between the corona electrodes and the cumulative electrodes due to a first potential difference, causing ionization of contaminant particles present in the air flow channel. A separator of contaminant particles is disposed in the air flow channel and includes input and output electrodes that enable the flow of air therethrough in a direction away from the input electrode to the output electrode and further to the channel outlet. During operation, there is a first potential difference between the corona and input electrodes and a second potential difference between the input and output electrodes, so that the electric field strength in the space between the input and output electrodes is directed opposite to that in the space between the ion generator and the input electrode.