AC Electric Field Drying Device Moisture Feedback Control
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Solution Overview
Problem
Drying devices that use electromagnetic waves to heat objects can malfunction if heating is continued without moisture, leading to generator failure.
Innovation Solution
A drying device with an AC electric field generation unit, a detector, and a control unit that adjusts the AC electric field based on moisture levels, using ultrasonic, capacitance, and optical sensors to ensure efficient drying and prevent generator malfunction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If electromagnetic wave heating is continued without moisture detection, then drying process is simple, but generator malfunctions due to excessive heating
Solution Approach 1:
The patent implements a feedback mechanism where a moisture detector continuously monitors the moisture content of the medium during the drying process. The control unit receives detection signals and adjusts or stops the electromagnetic wave heating accordingly. This feedback loop prevents generator malfunction by stopping heating when moisture is depleted, while maintaining operational simplicity through automated control.
2Reliability
If moisture detection is added to prevent generator malfunction, then reliability improves, but device complexity increases
Solution Approach 1:
The system employs self-service principles where the moisture detector automatically monitors moisture levels and the control unit autonomously decides when to stop heating based on detection signals. This eliminates the need for complex manual monitoring systems or additional sophisticated control mechanisms, thereby improving reliability while minimizing the increase in device complexity.
3Productivity
If continuous heating is applied, then drying efficiency is high, but energy is wasted when moisture is already depleted
Solution Approach 1:
The patent implements periodic action through intermittent electromagnetic wave heating controlled by moisture detection. The control unit activates heating only when moisture is detected and suspends or stops heating when moisture is depleted. This periodic on-off control maintains high drying efficiency during the necessary drying phase while eliminating energy waste from continuous heating after moisture removal is complete.
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 system effectively dries the medium by controlling the AC electric field generation in response to moisture levels, preventing generator failure and ensuring efficient drying.
Implementation Method 1
an AC electric field generation unit that generates an AC electric field
Implementation Method 2
a detector that detects an amount of moisture contained in the medium
Data Source
AI summary
A drying device that dries a medium being transported, the drying device includes a support that supports a medium being transported, an AC electric field generation unit that generates an AC electric field, a detector that detects an amount of moisture contained in the medium, and a control unit, wherein the AC electric field generation unit has first electrode and second electrodes disposed adjacent to each other and facing the medium supported by the support, a high-frequency voltage generator that generates a high-frequency voltage at the first and second electrodes, and a conductor that electrically couples the first electrode and the second electrode to the high-frequency voltage generator, and the detector is disposed at least one of downstream or upstream of the first and second electrodes in a transporting direction, and the control unit controls the AC electric field generation unit in accordance with a detection result of the detector.