Microwave Cooking Homogeneity Control via Dynamic Frequency
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Solution Overview
Problem
Microwave cooking technologies often result in uneven heating due to undefined behavior of microwaves, leading to inefficient cooking and potential overcooking or undercooking of food.
Innovation Solution
A method that determines the type of food to be cooked and adjusts the frequency and phase of emitted microwaves to achieve optimal homogeneity, using a higher number of frequencies for higher homogeneity and more phases for improved heat distribution, while monitoring cooking efficiency and adjusting power input based on food composition, consistency, and shape.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single frequency of microwaves is used for cooking, then cooking efficiency is improved, but heating homogeneity deteriorates
Solution Approach 1:
The patent applies dynamics by making the microwave frequency variable rather than fixed. The system dynamically adjusts the frequency based on a time-dependent homogeneity measure, switching between different frequencies to maintain optimal heating uniformity while preserving cooking efficiency. This resolves the contradiction by making the frequency adaptable to changing heating conditions throughout the cooking process.
Solution Approach 2:
The patent changes the frequency parameter of the microwaves over time according to a predetermined time course. By varying the frequency parameter in response to the homogeneity measure, the system achieves both efficient cooking and uniform heating distribution, resolving the trade-off between speed and uniformity.
2Manufacturing precision
If multiple frequencies of microwaves are used for cooking, then heating homogeneity is improved, but cooking efficiency deteriorates
Solution Approach 1:
The system dynamically selects and switches between multiple frequencies based on the current homogeneity measure and time progression. Rather than using all frequencies simultaneously or switching randomly, the system intelligently transitions between frequencies to maintain both efficiency and uniformity, resolving the contradiction between using multiple frequencies for homogeneity and the potential efficiency loss.
3Manufacturing precision
If microwave frequency is changed repeatedly, then heat distribution homogeneity is improved, but energy transfer efficiency deteriorates
Solution Approach 1:
The patent employs periodic action by changing the microwave frequency at predetermined time intervals based on a time-dependent homogeneity measure. This structured, periodic frequency modulation ensures uniform heat distribution while minimizing unnecessary frequency changes that would waste energy, thus resolving the contradiction between homogeneity improvement and energy efficiency.
4Productivity
If only the most efficient frequencies are used, then cooking efficiency is improved, but heating homogeneity deteriorates
Solution Approach 1:
The system dynamically adjusts between using efficient and less efficient frequencies based on the current homogeneity measure. When homogeneity is sufficient, it uses only efficient frequencies for maximum speed. When homogeneity deteriorates, it introduces additional frequencies to restore uniformity, then returns to efficient-only operation. This dynamic adaptation resolves the contradiction between speed and uniformity.
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 approach ensures even heating and cooking efficiency by actively controlling homogeneity, preventing hotspots and cold spots, and optimizing energy transfer, resulting in uniformly cooked food.
Implementation Method 1
Method for cooking food using at least one microwave unit
Data Source
Figure 1
AI summary
The invention relates to a method for cooking food (25) using a microwave unit (30), wherein the type of food is determined and a homogeneity parameter is defined over time depending on this determination. The food (25) is cooked according to the homogeneity parameter, with the number of different frequencies and/or phases of emitted microwaves being set based on the homogeneity parameter valid at any given time. The invention further relates to a cooking arrangement (10) for carrying out such a method, including a control unit (40) configured for carrying out this method.