Wedge-Shaped Dielectric Plates for Uniform Multimode Microwave Heating
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Solution Overview
Problem
Conventional microwave heating methods face issues with inconsistent heating efficiency and adaptability for loads of different shapes, sizes, and materials due to uneven microwave energy distribution.
Innovation Solution
A microwave heating method using wedge-shaped dielectric plates and an asymmetric waveguide in a multimode cavity, optimizing dielectric constants and heights to achieve unidirectional microwave propagation and efficient heating of arbitrary loads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional waveguides or cavities are used to transmit and radiate microwave energy directly to the load, then the structure is simple, but the heating efficiency is inconsistent for loads of different shapes, sizes, and materials
Solution Approach 1:
The patent introduces a dielectric plate as an intermediary component between the microwave source and the load. This dielectric plate modifies the microwave field distribution and enables efficient energy transfer to loads of various shapes, sizes, and materials, resolving the contradiction between heating efficiency and adaptability.
Solution Approach 2:
The patent optimizes parameters of the dielectric plate including dielectric constant (εr), thickness (d), and material composition to achieve optimal microwave heating performance. By adjusting these parameters, the system achieves high heating efficiency across different load configurations.
2Productivity
If microwave energy is transmitted directly to the load, then the device complexity is low, but the microwave energy distribution is uneven causing some areas to be overheated while others are heated insufficiently
Solution Approach 1:
The dielectric plate acts as a mediator that redistributes microwave energy more uniformly across the load. It modifies the electromagnetic field distribution pattern, preventing localized overheating while ensuring sufficient heating in all areas, thus improving heating uniformity.
Solution Approach 2:
The patent designs the dielectric plate with specific local properties including varying thickness and optimized dielectric constant distribution. This local optimization enables different regions of the plate to perform specific functions in controlling microwave energy distribution, achieving uniform heating across the entire load.
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
Improves heating efficiency for loads with different shapes and volumes to exceed 90%, enhancing energy utilization and adaptability.
Implementation Method 1
A microwave heating method using wedge-shaped dielectric plates and an asymmetric waveguide in a multimode cavity, optimizing dielectric constants and heights to achieve unidirectional microwave propagation
Implementation Method 2
Microwave heating is a heating process that utilizes the interaction between electromagnetic waves and matter, which triggers molecular vibration and friction for heating
Implementation Method 3
Microwave heating is a heating process that utilizes the interaction between electromagnetic waves and matter, which triggers molecular vibration and friction for heating
Implementation Method 4
Microwave heating is a heating process that utilizes the interaction between electromagnetic waves and matter, which triggers molecular vibration and friction for heating
Data Source
AI summary
A microwave heating method in a multimode cavity based on wedge-shaped dielectric plates includes steps of: optimizing dielectric constants and heights of the wedge-shaped dielectric plates and a bottom material in the multimode cavity, so as to heat arbitrary loads within the multimode cavity; wherein the arbitrary loads involves positions at which the loads are located, different tray dielectric constants and radii, different load dielectric constants and loss angles, and different load shapes for microwave heating simulation; the bottom material refers to a matter of a same material as the wedge-shaped dielectric plates, which covers a bottom of the multimode cavity. The microwave heating method can provides sufficient heating efficiency.