Cooking Appliance Fluid Level Sensing for Safe Microwave Heating
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Solution Overview
Problem
Cooking appliances, such as microwave ovens, often face issues with fluid levels in containers that can affect cooking outcomes and potentially damage components due to inadequate fluid levels or fluid loss during heating operations.
Innovation Solution
The implementation of sensors to measure fluid levels within a food container, allowing the controller to determine if the fluid level is within a selected range and adjust operations accordingly, such as deactivating microwaves or adjusting temperature to prevent damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If microwave radiation is used to heat food quickly, then cooking speed is improved, but fluid level control becomes critical to prevent component damage
Solution Approach 1:
The system performs preliminary fluid level detection before initiating microwave heating. The sensor measures the fluid level in the container and compares it to a minimum threshold, preventing the microwave from operating if the fluid level is insufficient, thereby protecting components from damage while enabling fast cooking when conditions are appropriate.
Solution Approach 2:
The system implements continuous feedback by monitoring fluid level during cooking operations. The sensor provides real-time data to the controller, which adjusts or terminates heating based on fluid level changes, ensuring component protection while maintaining efficient cooking performance.
2Reliability
If fluid level monitoring is implemented to protect components, then reliability is improved, but device complexity increases
Solution Approach 1:
The patent employs a simple, inexpensive fluid level sensor that detects the presence or absence of fluid at a critical level. This basic sensing approach provides adequate protection without requiring complex monitoring systems, maintaining reliability while minimizing added complexity and cost.
Solution Approach 2:
The system extracts only the essential function of fluid level detection needed for component protection, rather than implementing comprehensive fluid management. By focusing solely on detecting minimum fluid levels and triggering appropriate responses, the system achieves reliability improvement with minimal additional complexity.
Data Source
AI summary
A cooking appliance includes a cabinet and a cooking chamber defined within the cabinet. A method for operating the cooking appliance includes receiving, with a controller, sensor data from a sensor. The sensor data is indicative of fluid within a food container configured for heating by the cooking appliance. Additionally, the method includes determining, with the controller, whether the indicated fluid within the food container is outside of a selected fluid level range. Furthermore, the method includes operating, with the controller, the cooking appliance based on determining whether the indicated fluid within the food container is outside of the selected fluid level range.