Conductive Plastic Electrode Units for Corona-Resistant Dust Removal
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Solution Overview
Problem
Existing electrostatic dust removal apparatuses using metal electrodes are costly, difficult to machine into various shapes, prone to corona discharge, and pose safety risks due to ozone generation and electric shock, with complex assembly requirements.
Innovation Solution
An electrostatic dust removal apparatus utilizing conductive plastic electrode units with integrated conducting and insulating parts, arranged alternately to form air channels, reducing corona discharge and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metal electrodes are used in electrostatic dust removal apparatus, then good electrical conductivity is achieved, but manufacturing cost increases and machining difficulty increases
Solution Approach 1:
The patent uses composite plastic materials with conductive fillers (such as carbon black, metal powder, or conductive polymers) to create electrode units that combine the electrical conductivity needed for electrostatic dust removal with the manufacturing advantages of plastic. This allows the electrodes to be molded into complex shapes directly, eliminating costly metal machining operations while maintaining sufficient electrical conductivity for corona discharge and dust particle charging.
Solution Approach 2:
The patent changes the material parameter from pure metal to conductive composite plastic, adjusting the conductivity level to be sufficient for electrostatic field generation without requiring the high conductivity of pure metal. This parameter change enables the use of lower-cost materials that can be easily formed into various electrode geometries through molding processes.
2Reliability
If high-potential and low-potential electrodes are placed adjacent to each other, then electrostatic field strength increases for better dust removal, but corona discharge occurs causing ozone generation and electric shock risks
Solution Approach 1:
The patent introduces an insulating coating layer as an intermediary between the high-potential and low-potential electrode units. This insulating layer prevents direct electrical contact and uncontrolled corona discharge between adjacent electrodes while still allowing the electrostatic field to function for dust particle charging and attraction. The insulating material acts as a mediator that enables close electrode spacing for strong fields without the harmful effects of direct discharge.
Solution Approach 2:
The patent converts the potentially harmful corona discharge effect into a controlled and beneficial process. By using the insulating-coated conductive plastic electrodes, the design allows for controlled corona discharge at the electrode surfaces for dust particle charging, while preventing uncontrolled arcing and ozone generation between adjacent electrodes. The insulating layer ensures that discharge occurs only where intended, transforming a harmful side effect into a controlled functional element.
3Object-affected harmful factors
If additional insulators are provided between adjacent electrodes to prevent corona discharge, then safety improves, but device complexity and assembly complexity increase
Solution Approach 1:
The patent merges the insulating function with the structural electrode body by integrating the insulating coating directly onto the conductive plastic electrode units. Instead of using separate insulator components that would need to be assembled between electrodes, the insulating layer is formed as an integral part of each electrode unit during manufacturing. This eliminates additional assembly steps and reduces device complexity while maintaining the safety function of preventing corona discharge between adjacent electrodes.
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 solution provides lower manufacturing costs, ease of structure formation, enhanced safety, and convenient assembly, while improving dust removal efficiency and reducing wind resistance.
Implementation Method 1
in a strong electric field, an air molecule is ionized into a positive ion and an electron, the electron may encounter the dust particle during approaching the anode, and thus the dust particle is charged negatively
Implementation Method 2
the dust particles bond with negative ions and are charged negatively. Then the dust particles approach a surface of an anode and are deposited on the surface after discharging
Implementation Method 3
corona discharge is liable to occur between a high-potential electrode and a low-potential electrode which are adjacent to each other, causing production of ozone and occurrence of an electric shock
Data Source
AI summary
An electrostatic dust removal apparatus and an electrode unit thereof are disclosed. The electrostatic dust removal apparatus includes a frame, and a plurality of electrode units. The plurality of electrode units include at least one high-potential unit and at least one low-potential unit. The plurality of electrode units are provided on the frame and are spaced apart from each other. The at least one high-potential unit and the at least one low-potential unit are arranged alternately, and an air channel for removing dust is formed between the electrode units adjacent to each other. Each of the plurality of electrode units includes a conducting part and an insulating part, the conducting part is a conductive plastic part and includes an electrical field generator and a conducting end, and the insulating part covers at least a portion of the electrical field generator.