Ionizing arrangement
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Solution Overview
Problem
Ionizing arrangements in air filtration systems generate significant electromagnetic field emissions, which can interfere with surrounding equipment and systems, particularly in vehicles with limited space, where efficient ionization is needed without disrupting air flow.
Innovation Solution
An ionizing arrangement featuring a shielding electrode with a shape corresponding to the air duct's cross-sectional shape, including arc-shaped elements extending from both sides of the duct, functions as both a receiver and collector electrode to reduce electromagnetic emissions and minimize air flow disruption, utilizing a Faraday cage-like structure to contain electromagnetic fields.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a high voltage is applied to the emitter electrode and collector electrode to provide efficient ionization, then the ionization efficiency is improved, but severe electromagnetic field emissions are generated that interfere with surrounding equipment
Solution Approach 1:
A shielding electrode is introduced as an intermediary component between the corona electrode and the surrounding environment. This shielding electrode acts as a mediator that blocks electromagnetic field emissions from reaching external equipment while allowing the high voltage ionization process to continue efficiently. The shielding electrode is connected to ground potential, creating an electromagnetic barrier that prevents harmful field propagation.
Solution Approach 2:
The harmful electromagnetic field emissions are extracted and contained within a localized region by the shielding electrode. The shielding electrode creates a confined electromagnetic environment around the corona electrode, effectively separating the harmful emissions from the surrounding equipment and systems.
2Object-generated harmful factors
If a shielding electrode is added to reduce electromagnetic emissions, then the electromagnetic field emissions are reduced, but the device complexity increases
Solution Approach 1:
The shielding electrode is designed to perform multiple functions simultaneously: it serves as both a shielding element to block electromagnetic emissions and as a collector electrode to receive ions. This multi-functionality reduces the overall component count, as the shielding electrode replaces what would otherwise be a separate collector electrode, thereby mitigating the increase in device complexity.
Solution Approach 2:
The shielding and collection functions are merged into a single electrode structure. The shielding electrode combines the electromagnetic shielding function with the ion collection function, eliminating the need for separate components and simplifying the overall device architecture.
3Object-generated harmful factors
If the shielding electrode is designed with extensive shielding parts to maximize electromagnetic field reduction, then the electromagnetic emissions are reduced, but the impact on air flow through the arrangement increases
Solution Approach 1:
The shielding electrode is designed with non-uniform shielding characteristics: it provides extensive shielding in directions where electromagnetic emission reduction is most critical, while maintaining more open structures in regions where air flow is prioritized. This localized optimization allows the system to achieve effective electromagnetic shielding without excessively impeding air flow through the arrangement.
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 shielding electrode effectively reduces electromagnetic emissions to surrounding areas while maintaining efficient ionization of air particles, ensuring effective air filtration with minimal impact on air flow and system interference.
Implementation Method 1
one frequently used arrangement comprises an emitter electrode and a collector electrode, for example a corona tip surrounded by a ground electrode, such that particles passing between the emitter electrode and the collector electrode, i.e. the corona tip and the electrode, are charged when a high voltage is applied over the emitter electrode and the collector electrode
Implementation Method 2
The shielding electrode is further arranged to provide shielding of an electromagnetic field emanating from the corona electrode
Data Source
AI summary
An ionizing arrangement for electrically charging particles in an air flow in an air duct, said air duct including a section B extending along an axis A. The arrangement includes: a shielding electrode intended to be arranged within the air duct, said shielding electrode including: a portion for arrangement in a plane substantially transverse to the longitudinal axis A, said member has a shape corresponding to the cross sectional shape of the duct. The arrangement furthermore includes at least one corona electrode arranged in the center of the portion, wherein the shielding electrode is further arranged to provide shielding of an electromagnetic field emanating from the corona electrode.