RF Container with Transparent Inner Housing for Uniform Heating
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Solution Overview
Problem
Conventional microwave ovens supply electromagnetic energy at a single frequency, leading to non-uniform energy distribution and inefficient heating of objects in containers, particularly when dealing with diverse food items or phases of matter.
Innovation Solution
A container system with an outer housing opaque to RF energy and an inner housing that is RF transparent, featuring radiating elements placed between the two housings to apply RF energy uniformly to an energy application zone, allowing for controlled energy distribution and phase management to optimize heating.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single frequency RF source is used, then the device structure is simple, but the energy distribution is non-uniform and heating efficiency is low
Solution Approach 1:
The patent divides the RF energy source into multiple independent radiating elements, each capable of operating at different frequencies. This segmentation allows the system to achieve uniform energy distribution through coordinated operation of multiple elements while maintaining manageable structural complexity through modular design.
Solution Approach 2:
The patent employs multiple RF sources operating at different frequencies simultaneously or sequentially. By changing the frequency parameter across different radiating elements, the system creates varied electromagnetic field patterns that combine to achieve uniform energy distribution, thereby improving heating efficiency without requiring a completely complex device structure.
2Productivity
If multiple frequencies are applied to achieve uniform energy distribution, then heating efficiency improves, but the device complexity increases
Solution Approach 1:
The patent designs a system where multiple radiating elements can operate at different frequencies, making each element multi-functional. This universality allows the same hardware structure to achieve uniform energy distribution through frequency variation, improving heating efficiency without proportionally increasing device complexity.
Solution Approach 2:
The system dynamically adjusts which radiating elements operate and at what frequencies based on the specific heating requirements. This dynamic operation allows the device to achieve uniform energy distribution when needed while simplifying operation for single-frequency applications, thereby managing device complexity while maintaining high heating efficiency.
3Ease of operation
If conventional microwave heating is used, then the process is simple, but cooking time is long and nutrients are lost
Solution Approach 1:
The patent employs multiple radiating elements that can operate simultaneously and continuously to provide uniform and efficient heating throughout the container. This continuous and uniform energy application significantly reduces cooking time compared to conventional single-source microwave heating, while maintaining operational simplicity through automated control of the multiple elements.
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
This configuration ensures a substantially uniform distribution of RF energy, enabling efficient heating of diverse food items and phases of matter, reducing cooking time and preserving nutrients, as demonstrated by faster and more energy-efficient cooking of chicken soup compared to conventional methods.
Implementation Method 1
RF energy may be applied to the container via at least one radiating element
Implementation Method 2
Objects within such containers may be heated or processed using EM energy
Data Source
AI summary
Radiofrequency energy is applied to a container having an outer housing and an inner housing disposed at least partially within the outer housing. At least a portion of the inner housing is transparent to RF radiation. At least one antenna is configured to apply RF energy to an energy application zone within the inner housing. A processor is configured to control the application of RF energy to the energy application zone by selecting a set of modulation space elements (MSEs), and cause RF energy application at the modulation space elements of the selected set.