Aerodynamic Air Cleaner with High-Voltage Shield
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Solution Overview
Problem
Existing active field polarized media air cleaners face issues with high-voltage contact reliability due to arcing and erosion, leading to reduced efficiency and potential loss of contact, and require improved designs for better airflow and electrode performance.
Innovation Solution
The implementation of a V-bank configuration with an aerodynamic front cowling for reduced form drag and concealed high-voltage power supply, along with a large-area high-voltage contact using a disc and fastener system and a high-voltage shield to prevent arcing, and the use of extruded plastic netting for the center screen to minimize sharp edges and enhance operational voltage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a small-area high-voltage probe contact is used, then the device complexity is reduced, but the reliability deteriorates due to arcing and erosion leading to contact loss
Solution Approach 1:
The patent transitions from point-contact (0D) to surface-contact (2D) by using a conductive disc element that distributes the high-voltage connection across a larger surface area of the center screen, eliminating arcing and erosion issues associated with small-area contacts
Solution Approach 2:
The conductive disc acts as an intermediary between the high-voltage probe and the center screen, providing a distributed contact interface that prevents direct point-contact arcing while maintaining electrical connection reliability
2Productivity
If a conventional flat filter configuration is used, then the ease of manufacture is improved, but the productivity deteriorates due to higher form drag and airflow resistance
Solution Approach 1:
The patent applies aerodynamic curving to the filter housing and cowling surfaces, creating streamlined contours that reduce form drag and improve airflow characteristics compared to flat conventional configurations
Solution Approach 2:
The aerodynamic cowl serves multiple functions: it streamlines airflow to reduce drag, provides structural support for the filter assembly, and integrates mounting features, combining aerodynamic optimization with structural requirements
3Reliability
If the high-voltage power supply is exposed, then the device complexity is reduced, but the reliability deteriorates due to lack of protection and insulation
Solution Approach 1:
The high-voltage power supply is nested within the aerodynamic cowl housing, which provides both mechanical protection and electrical insulation, integrating the power supply protection function into the existing aerodynamic structure
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 configuration enhances airflow efficiency, maintains reliable high-voltage contact, and increases operational voltage, resulting in improved filter performance and extended lifespan by reducing arcing and erosion.
Implementation Method 1
The front cowling provides a lower form drag airflow to reduce filter static pressure drop (resistance to airflow)
Implementation Method 2
The electrostatic field polarizes both the media fibers and the particles that enter, thereby increasing the efficiency of the media and the air cleaner
Implementation Method 3
The principle of electrostatic attraction has been used for many years to enhance the removal of contaminants from air streams
Data Source
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AI summary
Improvements in active field polarized media air cleaner include an aerodynamic front cowling to reduce static air resistance, a rear double hinge to reduce blow by, a resistive center screen permitting the sharing of high voltage power supplies while reducing the tendency to arc and allowing for a higher operational voltage, a dielectric media support frame to produce a more uniform electrostatic field and reduce blow by, while at the same time reducing the tendency to spray corona and/or arc at the edges of the center screen, a substantially flat conductive outer screen to produce a more uniform electrostatic field throughout the filter media and a high-voltage shield to reduce high-voltage arcing and the spraying of corona where the high-voltage probe contacts the center screen.