Ion Generator Cover With Grounded Resistive Elements
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Solution Overview
Problem
Ion generators with surface resistivity less than or equal to 10^7 Ω/mm2 suffer from excessive ion absorption by the cover, leading to reduced static-elimination capacity due to electrostatic charging of the peripheral portions, which prevents new ion generation.
Innovation Solution
Incorporating grounded resistive elements at the peripheral portions of the cover openings in the ion generator, these elements prevent electrostatic charging and moderate ion absorption, allowing for efficient ion generation and discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the surface resistivity of the cover is set to less than or equal to 10^7 Ω/mm2 to ensure operator safety, then operator protection from electrical shocks is improved, but ion absorption by the cover becomes excessive, resulting in reduced static-elimination capacity
Solution Approach 1:
The cover is divided into two functional zones: a peripheral portion with grounded resistive elements (surface resistivity ≤ 10^7 Ω/mm2) for safety, and a central portion with high surface resistivity (≥ 10^9 Ω/mm2) for efficient ion discharge. This segmentation allows each zone to perform its specific function without interfering with the other, resolving the contradiction between safety and productivity
Solution Approach 2:
Different surface resistivity characteristics are applied to different regions of the cover. The peripheral portion has low surface resistivity to provide safety grounding, while the central portion has high surface resistivity to prevent ion absorption and maintain static-elimination capacity. This local differentiation allows the system to simultaneously achieve both operator protection and effective ion discharge
2Productivity
If the peripheral portion of the opening is allowed to be electrostatically charged to maintain ion generation, then ion generation efficiency is improved, but ions remain at the opening preventing new ion generation
Solution Approach 1:
The cover's peripheral portion is given low surface resistivity to actively discharge accumulated ions, preventing ion retention that would hinder new ion generation. This local property differentiation ensures that while the central area maintains ions for generation efficiency, the peripheral area continuously clears excess ions, resolving the contradiction between ion generation efficiency and ion retention
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 ion generation and discharge efficiency by preventing ion retention at the peripheral portions, thereby maintaining effective static elimination while ensuring operator safety from electrical shocks.
Implementation Method 1
The opening (in particular, the peripheral portion thereof) formed in the cover to discharge ions to the outside is easily electrostatically charged. Thus, ions remain at the opening
Implementation Method 2
generated ions are excessively absorbed by the entire cover, resulting in a reduction in static-elimination capacity
Implementation Method 3
ion generators that generate ions by electrical discharge between discharging needle electrodes and ground electrodes
Data Source
AI summary
An ion generator is capable of efficiently generating ions and includes a case accommodating an ion-generating element that generates ions by discharging electricity from a discharging needle electrode and a cover having openings for ion discharge. Resistive elements are disposed at peripheral portions of the openings, and the resistive elements are grounded. Since the resistive elements are grounded, the peripheral portions of the openings are prevented from being electrostatically charged. As a result, retention of ions at the openings is suppressed, and ions are efficiently generated and discharged.