Acicular Capture Electrode for Gaseous Sample Concentration
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Solution Overview
Problem
Conventional electrostatic atomizers spread electrostatically atomized solutions over flat capture electrodes, making it difficult to concentrate gaseous samples effectively.
Innovation Solution
A method using a sealed container with an atomizing electrode, an opposite electrode, and a capture electrode, where the gaseous sample is chilled to form a primary condensate, then charged microparticles are produced and concentrated near the tip of an acicular capture electrode using electrostatic atomization, and the capture electrode is chilled to collect a secondary condensate without spreading.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a flat plate capture electrode is used, then the electrode surface area is large, but the electrostatically atomized solution spreads over the whole surface instead of concentrating
Solution Approach 1:
The capture electrode is changed from a flat plate to an acicular (needle-shaped) electrode with a curved tip. This curvature concentrates the electrostatically atomized solution at the tip rather than allowing it to spread across a flat surface, thereby achieving both adequate collection area and precise concentration positioning.
Solution Approach 2:
The electrode design creates a localized collection zone at the tip of the acicular electrode rather than distributing the collection function across the entire electrode surface. This localizes the sample concentration function to a specific region, preventing spreading while maintaining effective collection.
2Quantity of substance
If the capture electrode is chilled to collect condensate, then the gaseous sample can be condensed, but the condensate spreads over the electrode surface
Solution Approach 1:
The curved tip of the acicular capture electrode causes the condensed liquid to form a concentrated droplet at the tip rather than spreading out. The curvature geometry naturally confines the condensate to a small volume at the apex, achieving both collection and concentration simultaneously.
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 method effectively concentrates electrostatically atomized solutions at the tip of the capture electrode, preventing them from spreading and allowing for precise collection of gaseous samples.
Implementation Method 1
preparing a primary condensate from the gaseous sample on an outer peripheral surface of the atomizing electrode
Implementation Method 2
preparing charged microparticles from the primary condensate with electrostatic atomization
Implementation Method 3
applying voltage to the capture electrode for the opposite electrode
Implementation Method 4
preparing a secondary condensate from the charged microparticles adjacent to the tip of the capture electrode
Data Source
AI summary
The present invention of collecting a gaseous sample employs a sealable container, an inlet mounted at a part of the container, an outlet mounted at another part of the container, an atomizing electrode mounted in the container, a primary refrigerator mounted adjacent to the atomizing electrode, an opposite electrode mounted in the container, an acicular capture electrode mounted adjacent to the opposite electrode, and a secondary refrigerator mounted adjacent to the capture electrode. Charged microparticles are prepared by chilling the gaseous sample and producing condensate of the same. Such charged microparticles are collected by the capture electrode with static electricity, and they are condensed by chilling them. This method prevents the capture electrode from spreading solution thereon.