Solid-State RF Heating Control for Uniform Industrial Processing
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Solution Overview
Problem
Conventional microwave ovens using magnetrons for industrial applications suffer from undesirable heat development, uncontrollable processes, and the occurrence of hot spots due to long operating times.
Innovation Solution
A processing apparatus utilizing solid-state radio frequency (RF) sources with individual control of amplitude, frequency, and phase, combined with sensors for precise energy management, to ensure even energy distribution and prevent hot spots.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If magnetron is used for microwave generation in industrial applications, then microwave energy can be produced, but long operating times result in undesirable heat development and uncontrollable processes
Solution Approach 1:
The patent divides the single magnetron system into multiple solid-state RF sources arranged in arrays. Each source can be independently controlled, allowing segmented energy delivery that prevents localized overheating and enables better thermal management across the processing chamber.
Solution Approach 2:
The solid-state RF sources enable dynamic control of amplitude, frequency, and phase for each individual source. This allows real-time adjustment of energy delivery to match actual processing needs, preventing excessive heat development while maintaining effective processing power.
2Power
If magnetron is used for microwave generation, then microwave energy can be produced, but the process is not sufficiently controllable
Solution Approach 1:
By segmenting the RF energy delivery system into multiple independently controllable solid-state sources, the patent enables precise control over energy distribution patterns. Each source can be individually adjusted to achieve desired processing outcomes with better controllability.
Solution Approach 2:
The system incorporates sensors that provide feedback on temperature and energy distribution, allowing the control system to adjust the solid-state RF sources in real-time. This closed-loop control significantly improves process controllability compared to conventional magnetron systems.
3Power
If magnetron is used for microwave generation, then microwave energy can be produced, but undesired hot spots occur
Solution Approach 1:
The patent employs multiple solid-state RF sources arranged in arrays to segment the microwave energy delivery. This segmentation allows energy to be distributed more uniformly across the processing chamber, preventing the formation of hot spots that occur with single-source magnetron systems.
Solution Approach 2:
Each solid-state RF source can be independently controlled to provide localized energy delivery tailored to specific regions. This allows the system to adjust energy distribution to match the actual heating requirements of different areas, ensuring uniform processing without hot spots.
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 controlled and efficient heating, cooking, drying, disinfection, and pasteurization with reduced energy consumption and improved yield by using solid-state RF technology.
Implementation Method 1
A processing apparatus with a solid-state radio frequency (RF)-transistor(s) in a RF power amplifier... converts a low power radio frequency signal into a higher power signal... radiate the microwaves into the waveguide... heating, cooking, drying, disinfecting, pasteurizing and/or sterilizing a substance
Implementation Method 2
A radio frequency power amplifier is an electronic amplifier, that converts a low power radio frequency signal into a higher power signal
Data Source
AI summary
The present invention relates to a processing apparatus, in which a substance is preferably heated, cooked, dried, disinfected and/or pasteurized, sterilized. The present invention further relates to a method to treat a substance with radio-frequency waves.