Susceptor-Coated Microwave Vessels for Universal Material Heating

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Solution Overview

Problem

Current microwave heating technologies are limited to efficiently heating only di-polar materials, as they are ineffective for microwave transparent materials due to minimal magnetic field interaction, restricting the universal application of microwaves for heating various products.

Innovation Solution

Incorporating susceptors within vessels that absorb electromagnetic energy from microwaves and convert it to thermal energy, allowing for the heating of both di-polar and microwave transparent materials by coating the vessel's interior with susceptor materials like aluminum oxide or silicon carbide, which can be bonded using chemical methods or high-temperature processes.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Temperature

If microwaves are applied to microwave transparent materials, then the materials remain unheated due to minimal magnetic field interaction, but applying microwaves to di-polar materials results in effective heating

Engineering Contradiction:

Improveheating effectivenessVSAvoidmaterial polarity compatibility

Core Design Contradiction:

TemperatureVSAdaptability or versatility

Solution Approach 1:

The patent introduces susceptors as intermediary materials that are applied to the vessel interior surface. These susceptors act as a mediator between the microwave field and microwave transparent materials, absorbing microwave energy and converting it to thermal energy that then transfers to the processed material, enabling heating of materials that would otherwise be unheatable by microwaves alone

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The susceptor-coated vessel system achieves universal heating capability across different material types. The susceptor layer enables the vessel to effectively heat both di-polar materials (which naturally absorb microwaves) and microwave transparent materials (which previously did not absorb microwaves), making the microwave heating system universally applicable to all material polarities

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If susceptors are incorporated into vessels, then universal heating of materials regardless of polarity is enabled, but the device complexity increases due to additional coating processes

Engineering Contradiction:

Improvematerial polarity compatibilityVSAvoidvessel manufacturing process

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent modifies the physical-chemical parameters of the vessel by applying susceptor coatings with specific material compositions and thicknesses. This parameter change transforms the vessel from being ineffective for microwave transparent materials to universally effective, while the coating processes use established industrial techniques to manage the complexity

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The vessel becomes a composite structure combining the base vessel material with susceptor coating layers. This composite construction integrates the microwave-absorbing properties of susceptors with the functional properties of the vessel material, achieving enhanced versatility while using mature composite material manufacturing techniques

Inventive Principle:

Principle #40Composite materials

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 universal heating of materials regardless of polarity, demonstrated by significant temperature increases in microwave transparent materials when susceptors are used, as shown in temperature variation charts, enhancing the efficiency of microwave-based processing.

Implementation Method 1

A susceptor is a material used for its ability to absorb the electromagnetic energy of microwaves and convert it to heat

Methodology Applied

Scientific EffectElectromagnetic energy absorption and conversion to thermal energy: Absorption (EM radiation)

Implementation Method 2

Microwaves apply an electric field and a magnetic field to the materials to be heated. The magnetic field of microwaves interacts with di-polar materials creating more effective excitation that results in frictional heat

Methodology Applied

Scientific EffectMicrowave heating: Dielectric Heating

Implementation Method 3

convert it to heat and to infrared thermal energy that is also re-emitted as infrared thermal radiation

Methodology Applied

Scientific EffectInfrared thermal radiation: Infrared Radiation

Implementation Method 4

The magnetic field of microwaves interacts with di-polar materials creating more effective excitation that results in frictional heat

Methodology Applied

Scientific EffectMagnetic field interaction with di-polar materials: Magnetic Field

Data Source

PatentUS11691801B2Apparatus and process for incorporation of susceptors into vessels

Publication Date: 2023.07.04 WAVETEK PROCESS TECH LLC

AI summary

A process and apparatus for heating a microwave transparent material or di-polar material. The apparatus includes a vessel that has susceptor material on at least a portion of the vessel walls. Microwaves are generated by a microwave transmitter and introduced into the vessel which can heat both microwave transparent materials and di-polar materials within the vessel.