Multi-Electrode Dielectric Heating for Uniform Deep Heat Penetration
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Solution Overview
Problem
Existing dielectric heating devices lack efficient mechanisms for uniform heating and deep penetration of heat, which limits their application in various fields such as food care, clothing care, and skin care.
Innovation Solution
A dielectric heating device is designed with a load circuit comprising multiple electrodes and an inductor, where the electrodes are arranged in a specific configuration to allow for the output of alternating current power, enhancing the uniformity and depth of heat penetration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If conventional microwave heating is used, then heating speed is fast, but heat penetration is shallow and uniformity is poor
Solution Approach 1:
The patent divides the heating system into multiple independent electrode units arranged in an array. Each electrode can be independently controlled to generate localized electric fields, enabling segmented heating zones that penetrate deeply into the material while maintaining uniform temperature distribution through coordinated control of individual segments.
Solution Approach 2:
The patent implements local quality by allowing each electrode in the array to operate with independent voltage control. This enables different regions of the material to receive customized heating intensity based on local requirements, achieving both deep penetration in specific zones and overall uniformity across the entire material surface.
2Productivity
If high-frequency power is applied for fast heating, then heating efficiency is high, but heat distribution becomes non-uniform
Solution Approach 1:
The patent employs periodic alternating current through multiple electrodes to generate oscillating electric fields. This periodic action allows for pulsed heating cycles where different electrode groups are activated sequentially, maintaining high overall heating efficiency while preventing localized overheating and ensuring uniform heat distribution across the material.
Solution Approach 2:
The patent implements dynamic control of electrode voltages and currents, allowing the system to adapt heating parameters in real-time based on material response. This dynamic adjustment maintains high heating efficiency while continuously optimizing heat distribution uniformity throughout the heating process.
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 device achieves uniform and deep heating, improving the effectiveness of applications such as food care, clothing care, and skin care, while also allowing for controlled freezing and supercooling of objects.
Implementation Method 1
Dielectric heating is a technique of heating an object using a short-range electric field. When high-frequency power of several tens of MHz is applied to an object (e.g., an object to be heated), a high-frequency electric field is generated so that polar molecules in the object are rotated or vibrated, heating the object.
Data Source
AI summary
A dielectric heating device is provided. The dielectric heating device includes at least one power source, a load circuit including a plurality of electrodes and at least one inductor, and at least one driving circuit configured to output alternating-current power to the load circuit by using power provided from the at least one power source, wherein the plurality of electrodes include a plurality of top electrodes arranged in substantially the same plane, and one bottom electrode arranged in a plane parallel to the plane formed by the plurality of top electrodes.