Non-Modal Interplate Microwave Applicator for Uniform Heating
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Solution Overview
Problem
Existing microwave applicators for laboratory use suffer from uneven heating, bulkiness, complexity, and high cost due to reliance on resonant cavities, making them unsuitable for small or single specimens and requiring fixed frequencies.
Innovation Solution
A non-modal interplate microwave applicator with two plates that generate an electromagnetic field between them, avoiding standing waves and resonant cavities, allowing for compact, low-power, and uniform heating of specimens.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If resonant cavity microwave systems are used, then microwave heating can be achieved, but uneven specimen heating occurs due to variation of microwave energy density within mode patterns
Solution Approach 1:
The patent removes the resonant cavity from the microwave heating system, extracting the problematic mode patterns that cause uneven energy distribution. By using a waveguide to deliver microwaves directly to the specimen without a resonant cavity, the system eliminates standing waves and achieves uniform heating across the specimen surface.
Solution Approach 2:
Instead of using a resonant cavity to concentrate microwave energy (conventional approach), the patent inverts the approach by using a waveguide to distribute microwave energy uniformly across the specimen. This reversal of the energy concentration strategy prevents hot spots and achieves even heating.
2Power
If resonant cavity microwave systems are used, then microwave heating can be achieved, but the device becomes bulky due to the requirement for a resonant cavity
Solution Approach 1:
The patent extracts and removes the resonant cavity component from the microwave system, replacing it with a compact waveguide structure. This extraction eliminates the bulky cavity while maintaining microwave heating capability through direct waveguide-to-specimen energy transfer.
3Power
If resonant cavity microwave systems are used, then microwave heating can be achieved, but the system becomes complex to control or compensate for variation in energy density
Solution Approach 1:
By removing the resonant cavity and its associated mode patterns, the patent eliminates the complexity of controlling and compensating for energy density variations. The waveguide system provides straightforward, uniform energy delivery without the need for complex control mechanisms to manage standing waves.
4Power
If fixed frequency microwave systems are used, then microwave heating can be achieved, but the system lacks adaptability for different specimen types and sizes
Solution Approach 1:
The patent implements a tunable frequency microwave source that can be dynamically adjusted to match different specimen types, sizes, and dielectric properties. This dynamic frequency adjustment capability allows the system to adapt to various heating requirements without being constrained by a fixed frequency design.
Solution Approach 2:
The system changes the microwave frequency parameter dynamically based on specimen characteristics. By allowing frequency variation rather than maintaining a fixed frequency, the system achieves versatility across different specimen types while maintaining effective heating through optimal frequency matching.
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
Enables efficient, uniform heating of small or multiple specimens with reduced power requirements and compact design, suitable for automated slide staining systems and inline heating applications.
Implementation Method 1
A microwave applicator employs microwave radiation to heat an object
Implementation Method 2
A microwave applicator employs microwave radiation to heat an object
Data Source
Figure 1A~1C
Figure 2A~2E
Figure 3A~3B
AI summary
Disclosed is a microwave heater and a method of heating. The microwave heater includes a non-modal interplate microwave applicator and may include a nonresonant enclosure. The non-modal interplate microwave applicator is configured to receive therein a load to be heated by microwaves radiated from the non-modal interplate microwave applicator.