Microwave Waveguide and Absorber Layout for Uniform Thread Heating
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Solution Overview
Problem
Existing microwave heat processing apparatuses face challenges in uniformly heating thread-type objects due to differences in microwave absorption rates, leading to inconsistent final temperatures using standing or traveling wave methods.
Innovation Solution
A microwave heat processing apparatus with a specific arrangement of a microwave absorber having high temperature stability and extraordinary thermal conductivity, which absorbs and further heats thread-type objects using a quasi-traveling wave, combined with a primary waveguide tube design that includes auxiliary openings and a microwave baffle to enhance uniform heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the standing wave method is used to heat thread-type objects, then the heating range is smaller and more concentrated, but the heating uniformity deteriorates and cannot uniformly heat the thread-type objects
Solution Approach 1:
The waveguide tube is divided into multiple sections along the thread-type object's extending direction, with each section containing independently controllable microwave generators. This segmentation allows different regions to be heated independently, achieving both concentrated heating range and uniform temperature distribution across the entire object.
Solution Approach 2:
Different sections of the waveguide tube are equipped with microwave generators having different output powers according to the actual heating requirements of corresponding regions. This local quality adjustment ensures that each part of the thread-type object receives appropriate heating intensity, achieving overall heating uniformity while maintaining concentrated heating capability.
2Temperature
If the traveling wave method is used to heat thread-type objects, then the heating range is larger, but the heating uniformity deteriorates due to different microwave-absorption rates of different parts
Solution Approach 1:
The waveguide tube is divided into multiple sections along the thread-type object's extending direction, with each section containing independently controllable microwave generators. This segmentation allows different regions to be heated independently, achieving both concentrated heating range and uniform temperature distribution across the entire object.
Solution Approach 2:
The output power of microwave generators in different sections is adjusted according to the actual heating requirements and microwave absorption characteristics of corresponding regions. By dynamically changing the power parameters of each section, the system achieves uniform temperature distribution across the entire heating range while accommodating varying absorption rates.
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 and efficient heating of thread-type objects by absorbing microwave energy uniformly, ensuring stable and high-efficiency heat processing.
Implementation Method 1
The thread-type object may be heated by absorbing the traveling wave produced by a microwave source and further heated by the microwave absorber
Implementation Method 2
a microwave source connected to the primary waveguide tube
Implementation Method 3
a primary waveguide tube configured to accommodate the thread-type object
Data Source
AI summary
A microwave heat processing apparatus is provided. The microwave heat processing apparatus includes a microwave chamber and a microwave source. The microwave chamber is configured to heat up a thread type object and includes a primary waveguide tube and a microwave absorber. The primary waveguide tube is configured to accommodate the thread type object, in which a tube wall of the primary waveguide tube has an auxiliary opening and a center extension direction does not pass through the auxiliary opening. The microwave absorber is in the primary waveguide tube. The microwave source connects to the primary waveguide tube.