Spherical Electrode Air Cleaning for Uniform Particle Ionization
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Solution Overview
Problem
Current air cleaning devices with ionizing units and filter media do not achieve optimal air cleaning efficiency due to limitations in particle charging and attraction mechanisms.
Innovation Solution
An air cleaning device with a spherically curved collector electrode and a centered emitter electrode creates a larger uniform ionization field, allowing more airborne particles to be charged and efficiently captured by a dielectric filter medium or electrostatic precipitator, enhancing overall air cleaning efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a conventional ionizing unit with flat electrodes is used, then the device structure is simple, but the ionization efficiency is insufficient and particles cannot be effectively charged
Solution Approach 1:
The collector electrode is designed with a spherically curved inner surface and the emitter electrode is positioned at the center, creating a uniform radial electric field. This spherical geometry ensures consistent field distribution throughout the ionization chamber, maximizing ionization efficiency while maintaining a relatively simple single-chamber structure.
Solution Approach 2:
The patent optimizes specific parameters including the radius of the spherical collector electrode (5-15 cm), the distance between emitter and collector (1-5 cm), and the applied voltage (3-15 kV). These parameter adjustments create optimal conditions for corona discharge and particle charging, significantly improving ionization efficiency.
2Productivity
If the emitter electrode is not centered with the collector electrode, then the device assembly is easier, but the ionization field uniformity is poor and particle charging is inefficient
Solution Approach 1:
The spherical geometry of the collector electrode with the emitter positioned at its center creates a naturally uniform radial electric field. This geometric configuration inherently ensures field uniformity without requiring complex alignment mechanisms, as the spherical shape maintains equidistant spacing from the center point to all points on the inner surface.
Solution Approach 2:
The spherical collector electrode creates equipotential surfaces that are concentric with the emitter electrode. This equipotential configuration ensures uniform electric field strength throughout the ionization chamber, maximizing particle charging efficiency while simplifying the alignment requirements through geometric symmetry.
3Productivity
If the ionization field is non-uniform, then the electric field strength varies and ionization efficiency decreases, but creating a uniform field requires complex electrode designs
Solution Approach 1:
The spherical collector electrode with centered emitter creates a uniformly distributed radial electric field. The spherical geometry ensures that the electric field strength is consistent at all points equidistant from the emitter, creating an uniform ionization field throughout the chamber without requiring complex multi-electrode configurations.
Solution Approach 2:
By optimizing the radius of the spherical collector (5-15 cm) and the emitter-collector distance (1-5 cm), the patent achieves a uniform electric field distribution that maximizes ionization efficiency. The applied voltage range (3-15 kV) is also optimized to maintain field uniformity while preventing breakdown.
4Productivity
If charged particles adhere to the collector electrode, then the ionization field is disrupted and air cleaning efficiency decreases, but preventing adhesion requires optimized voltage and geometry
Solution Approach 1:
The patent optimizes the voltage range (3-15 kV) and dimensional parameters (collector radius 5-15 cm, emitter-collector distance 1-5 cm) to create an electric field strong enough for efficient particle charging but not so strong as to cause particle adhesion to the collector. These optimized parameters ensure particles remain charged and are directed toward the separating unit rather than adhering to the collector electrode.
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 design increases ionization efficiency, ensuring that a higher percentage of charged particles are attracted and removed from the air flow, thereby improving the air cleaning device's effectiveness.
Implementation Method 1
Corona discharges occur at the emitter electrode, whereby molecules in the air get charged (ionized) and turn into ions
Implementation Method 2
a voltage may be applied over the emitter electrode and the collector electrode, whereby an electric field is obtained between the emitter electrode and the collector electrode
Implementation Method 3
The ions travel in the electric field towards the collector electrode and collide with particles present in the air flow conducted by the collector electrode, whereby these particles get charged (ionized)
Implementation Method 4
The particles charged by the ionizing means are attracted by the fibers of the filter by electrostatic force
Data Source
AI summary
An air cleaning device for separating airborne particles from a flow of air is provided. The air cleaning device comprises a separating unit and an ionizing unit arranged to charge airborne particles present in the flow of air and transmit at least a major part of the charged particles towards the separating unit. The ionizing unit comprises at least one collector electrode and at least one emitter electrode. The separating unit is arranged to attract at least some of the charged particles so as to separate them from the flow of air. Further, the at least one collector electrode is shaped so as to conduct at least a portion of the flow of air and has a spherically curved inner surface and the emitter electrode is centered with respect to the spherically curved inner surface of the collector electrode.