Dual RF Electrode Arrays for Uniform Dielectric Drying
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Solution Overview
Problem
Existing RF heating systems for dielectric products suffer from spatially nonuniform heat generation due to varying electric field strengths across electrodes, leading to hotspots during production.
Innovation Solution
A system comprising two arrays of electrodes arranged in planes with adjustable spacing and coupled to radio-frequency generators producing uniform electric fields, ensuring uniform heat distribution through phase harmonization and electrode design.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single array of electrodes is used for RF heating, then the heating process is simple, but the electric field strength varies across the electrode extension causing spatially nonuniform heat generation
Solution Approach 1:
The single array of electrodes is divided into two separate arrays (first array and second array) positioned on opposite sides of the dielectric product. Each array contains multiple electrodes that can be independently controlled. This segmentation allows the electric field to be distributed more uniformly across the product, eliminating the spatial nonuniformity and hotspot formation that occurs with a single array configuration.
2Productivity
If high frequency electric fields are used for rapid heating, then the heating rate is efficient, but standing waves are created in electrodes resulting in high potentials at certain points and zero potential at other points
Solution Approach 1:
The harmful standing wave effects and hotspots are extracted and eliminated by using two opposing arrays of electrodes instead of one. The dual-array configuration creates a more balanced electric field distribution that prevents standing wave formation, while maintaining the high frequency operation needed for rapid heating. This allows efficient heating without the uniformity problems caused by standing waves.
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
Achieves uniform heat generation and efficient drying of dielectric products of varying sizes and shapes, maintaining high heating rates while avoiding hotspots.
Implementation Method 1
Radio Frequency (RF) heating and drying systems utilize electromagnetic energy to rapidly heat and dry many types of bulk materials, such as dielectric materials
Data Source
Figure 1~2
Figure 3~4
AI summary
System (1) for drying of dielectric products (99) comprising: a first array (10) of first electrodes (100), wherein the first array (10) is arranged along a first plane (P1), which extends along a first direction (L1) and a second direction (L2), a second array (20) of second electrodes (200), wherein the second array (20) is arranged along a second plane (P2), which extends along the first direction (L1) and the second direction (L2), and wherein the first plane (P1) is spaced apart from the second plane (P2) along a third direction (L3), and wherein each of the first electrodes (100) is spaced apart from its corresponding second electrode (200) along the third direction (L3), forming a plurality of pairs (300) of the first electrode (100) and the second electrode (200). The system (1) further comprises a plurality of radio-frequency generators (30) adapted to produce radio frequency signals of specific and adjustable amplitude and preselected frequency, wherein each of the plurality of radio-frequency generators (30) is electrically coupled to one pair (300) of the first electrode (100) and the second electrode (200).