Microwave Frequency-Selective Heating Device
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Solution Overview
Problem
Conventional microwave heating technologies face challenges with material heating uniformity and efficiency due to low microwave absorption rates at specific frequency points, leading to suboptimal heating performance.
Innovation Solution
A microwave frequency-selective heating device and method that utilizes a micro-processor-controlled frequency controller to select and adjust heating frequencies based on the dielectric properties of materials, calculating optimal electric, magnetic fields, and temperature conditions to enhance microwave absorption and uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If variable-frequency microwave heating is used to improve heating uniformity, then heating uniformity is improved, but heating efficiency decreases due to low microwave absorption rate at certain frequency points
Solution Approach 1:
The patent applies parameter changes by systematically varying microwave frequency parameters to identify optimal absorption frequencies for different materials. The system scans through frequency ranges (e.g., 2.4-2.5 GHz) to find peak absorption points, then operates at these optimized frequencies to simultaneously achieve high heating efficiency and uniform temperature distribution.
Solution Approach 2:
The patent implements feedback mechanisms using temperature sensors and power detectors to monitor heating progress and material response in real-time. This feedback enables dynamic adjustment of frequency and power levels, allowing the system to maintain optimal heating conditions and compensate for variations in material properties or heating stage.
2Productivity
If conventional fixed-frequency microwave heating is used, then heating efficiency is maintained, but heating uniformity deteriorates
Solution Approach 1:
The patent transforms the static fixed-frequency approach into a dynamic system that continuously or periodically adjusts frequency based on material characteristics and heating stage. The system can switch between multiple frequency points during the heating process, adapting to changing material properties and ensuring uniform heating throughout.
Solution Approach 2:
The patent creates a universal heating system capable of handling diverse materials with different dielectric properties by implementing automatic frequency selection and adaptation. The system can identify and optimize for each material's specific absorption characteristics, making it universally applicable across different material types while maintaining both efficiency and uniformity.
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 solution significantly improves heating uniformity and efficiency by intelligently selecting and adjusting frequencies, thereby increasing material microwave absorption rates and achieving better temperature distribution.
Implementation Method 1
microwave energy, as a novel energy which is high-efficiency and clean, has been widely used
Implementation Method 2
Microwave heating is 'overall heating', which is a selective heating method with a direct effect on materials to be heated
Implementation Method 3
material's microwave absorption rate is very low at several frequency points
Data Source
AI summary
The present invention relates to a technical field of microwave heating, and more particularly to a microwave frequency-selective heating device and a method thereof. The microwave frequency-selective heating device includes: a heating chamber with a microwave feed-in device, and a frequency controller; wherein the frequency controller is connected to the microwave feed-in device. According to the microwave frequency-selective heating device and the method of the present invention, the heating frequency is adjusted by setting the microwave adjusting device, which improves a material heating uniformity while greatly increases a material microwave absorption rate, so as to solve a heating efficiency problem of the conventional technologies. According to the present invention, the frequency for the heated material is intelligently selected by the micro-processor of the microwave adjusting device, and then fed in after being adjusted by the frequency control circuit, which is effective and convenient.