Electrode Layout for Uniform Electromagnetic Drying
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Solution Overview
Problem
Existing drying devices using electromagnetic waves to dry media with ejected liquid face uneven drying due to concentrated electric field regions at the ends of the first electrode, leading to inconsistent drying degrees.
Innovation Solution
The drying device incorporates a first electrode with a second electrode section surrounding it and a conductor configuration that includes a first conductor section branching from both ends of the first electrode, coupled to a second electrode section separated from the medium, to evenly distribute electromagnetic waves and reduce uneven drying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple electrode structure is used, then device complexity is reduced, but electromagnetic wave intensity becomes uneven causing poor manufacturing precision
Solution Approach 1:
The first electrode is divided into a first electrode section (overlapping with the second electrode) and a second electrode section (surrounding the first electrode section but not overlapping). This segmentation allows different sections to serve different functions: the first section provides strong electromagnetic field for drying, while the second section acts as a shield to prevent field concentration at ends and reduce electric discharge, thereby achieving uniform drying without excessive complexity
Solution Approach 2:
Different sections of the first electrode are given different spatial configurations relative to the second electrode. The first electrode section is positioned to overlap with the second electrode for effective drying, while the second electrode section surrounds it without overlapping, creating local variations in electromagnetic field distribution that prevent concentration at specific points and ensure uniform drying across the medium
2Productivity
If high-frequency voltage is applied to dry the medium, then drying speed is improved, but electric field concentration causes harmful electric discharge
Solution Approach 1:
The second electrode section, which does not overlap with the medium, acts as a protective shield that converts the potentially harmful concentrated electric field at the ends of the first electrode into a beneficial containment structure. This surrounding configuration prevents electric discharge by distributing the electric field more evenly, while still allowing the overlapping first electrode section to provide strong electromagnetic waves for efficient drying
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 equalizes the electromagnetic wave intensity, preventing uneven drying and maintaining efficient drying performance by minimizing electric discharge and wave intensity loss.
Implementation Method 1
a drying section that dries the medium onto which liquid is ejected, by generating electromagnetic waves according to on an applied high-frequency voltage
Implementation Method 2
a drying section that dries the medium onto which liquid is ejected, by generating electromagnetic waves according to on an applied high-frequency voltage
Data Source
AI summary
The drying device includes a drying section that dries the medium onto which liquid is ejected, by generating electromagnetic waves according to on an applied high-frequency voltage. The drying section includes a first electrode, a second electrode arranged so as to surround the first electrode in plan view from a first direction toward a medium, a first conductor electrically connecting the first electrode to a transmission line including a coil and configure to transmit a high-frequency voltage, and a second conductor electrically coupling the transmission line and the second electrode. The first electrode includes a first electrode section arranged at a position overlapping the second electrode in the first direction and a second electrode section that is arranged at a position that does not overlap the second electrode in the first direction and that is separated from the medium, and that surrounds the first electrode section in plan view from the first direction.