Load-Dependent Microwave Power Adjustment for Reproducible Cooking
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Solution Overview
Problem
Microwave cooking appliances struggle with reproducible cooking results due to the non-intuitive linear scalability of microwave energy with load size, leading to overcooking or undercooking when varying food quantities.
Innovation Solution
A method for load-dependent adjustment of microwave power based on determining the number of dielectric unit volumes in the cooking chamber, using a quality factor to calculate the required microwave power, ensuring consistent cooking results across different load sizes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If microwave power is kept constant, then cooking time can be reduced, but cooking results become non-reproducible across different load sizes
Solution Approach 1:
The patent implements dynamic adjustment of microwave power based on the detected load size. The system continuously monitors the number of dielectric unit volumes and adjusts the microwave power accordingly, transitioning from a static fixed-power approach to a dynamic adaptive approach that maintains consistent cooking results across varying load conditions.
Solution Approach 2:
The patent changes the microwave power parameter based on the detected load. By calculating the number of dielectric unit volumes and adjusting the power level accordingly, the system modifies the energy input parameter to maintain consistent cooking results regardless of whether the load is small or large, thus resolving the contradiction between speed and reproducibility.
2Speed
If microwave power is increased for larger loads, then cooking speed improves, but power per unit volume becomes non-linear and unpredictable
Solution Approach 1:
The patent employs feedback by detecting the actual load size through dielectric unit volume measurement and using this information to adjust the microwave power. This closed-loop approach ensures that the power increase for larger loads is precisely calibrated, maintaining linear scalability and making the system's behavior predictable and intuitive for users.
Solution Approach 2:
The system performs self-adjustment by automatically detecting the load size and setting the appropriate microwave power without requiring user intervention. The cooking appliance serves itself by monitoring its own operating conditions and adapting the power level to match the actual cooking needs, eliminating the need for users to manually calculate or estimate the appropriate power setting.
3Device complexity
If fixed microwave power is used, then device complexity is reduced, but cooking results vary with load size requiring user intervention
Solution Approach 1:
The patent implements self-service by enabling the cooking appliance to automatically detect the load size through dielectric measurements and adjust the microwave power accordingly. This eliminates the need for users to manually assess the load and make adjustments, as the system performs these functions autonomously, significantly reducing user effort while maintaining simple device architecture.
4Reliability
If microwave power is adjusted for different loads, then cooking result consistency improves, but measurement and control complexity increases
Solution Approach 1:
The patent replaces complex mechanical or manual load assessment methods with electromagnetic field-based dielectric measurements. By using the interaction between microwave fields and the food load to determine unit volumes, the system achieves accurate load detection without requiring complex mechanical sensors or manual intervention, thus maintaining reliability while controlling complexity.
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
Ensures reproducible cooking results by automatically adjusting microwave power according to the load, reducing user intervention and minimizing the risk of overcooking or undercooking.
Implementation Method 1
modern cooking appliances often also use microwave sources (additionally) that introduce energy into the food(s) using electromagnetic radiation to (additionally) heat them
Implementation Method 2
Determining a number of dielectric unit volumes in the cooking chamber; determining a target microwave power based on the number of dielectric unit volumes
Data Source
Figure 1~2
AI summary
The invention relates to a method for load-dependent adjustment of a microwave power in a cooking appliance (10) having a cooking chamber (14) and a microwave module (16), comprising the steps of: - determining a number of dielectric unit volumes in the cooking chamber (14); - determining a target microwave power based on the number of dielectric unit volumes; and - adjusting the microwave power of the microwave module (16) based on the determined target microwave power. The invention further relates to a cooking appliance (10).