Determining cookware location on a cooktop appliance based on temperature response
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Solution Overview
Problem
Cooktop appliances face challenges in ensuring that a cooking utensil with a temperature sensor is correctly located on the heating element being adjusted, leading to degraded cooking performance due to indirect measurement of cooking temperature and potential misplacement of utensils.
Innovation Solution
A cooktop appliance with a controller system that activates one heating element for a testing period and monitors the temperature associated with a cooking utensil, determining if it is correctly located based on a predefined threshold, ensuring accurate heating adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a temperature sensor is used to directly measure the temperature of a cooking utensil, then the measurement precision of cooking temperature is improved, but the reliability of heating control deteriorates due to potential misplacement of the utensil with the temperature sensor on the wrong heating element
Solution Approach 1:
The system performs a preliminary testing period before normal operation, where the heating element is activated at a predetermined power output to establish baseline temperature response characteristics. This preliminary action allows the system to verify utensil-heating element correspondence before committing to long-term heating control, preventing misplacement issues from degrading reliability.
Solution Approach 2:
The system continuously monitors the temperature response of the cooking utensil during the testing period and compares it against expected temperature profiles for each heating element. This feedback mechanism enables the system to detect misplacement and adjust or reject heating control actions, thereby maintaining reliability even when measurement precision alone is insufficient to guarantee correct positioning.
2Productivity
If the heating element is adjusted based on the measured temperature from a cooking utensil, then the cooking performance is improved, but the productivity of the cooktop appliance deteriorates when multiple cooking utensils are involved due to unsuitable heating adjustments for other utensils
Solution Approach 1:
The system segments the heating control process into distinct phases: a testing period for verification and a normal operation period for cooking. During the testing period, individual heating elements are evaluated separately to establish their temperature response characteristics. This segmentation allows the system to identify which heating element corresponds to which cooking utensil, preventing cross-interference and ensuring each utensil receives appropriate heating control.
Solution Approach 2:
The system applies different control strategies to different heating elements based on their verified correspondence with cooking utensils. Each heating element's power output and temperature adjustments are customized according to the specific utensil it is heating, rather than applying uniform control across all elements. This local quality approach ensures optimal cooking performance for each utensil while maintaining overall system productivity.
3Reliability
If a testing period is implemented to verify utensil location, then the reliability of heating control is improved, but the time required for cooking operation increases
Solution Approach 1:
The testing period applies partial action by activating only the specific heating element associated with the cooking utensil containing the temperature sensor, rather than all heating elements simultaneously. This partial activation reduces the overall time required for verification while still providing sufficient temperature response data to reliably determine utensil location. The testing period is also limited to a predetermined duration, preventing excessive time consumption.
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 solution ensures that the cooking utensil is correctly positioned on the intended heating element, improving cooking performance by directly verifying the utensil's location and adjusting the heating level accordingly, thus preventing unsuitable heating for other utensils.
Implementation Method 1
activating the first heating element for a testing period
Implementation Method 2
monitors the temperature associated with the cooking utensil
Data Source
AI summary
A cooktop appliance includes first and second heating elements and a controller operably connected to the first and second heating elements. The controller is configured for receiving a signal from a temperature sensor associated with a cooking utensil. The controller is also configured for activating the first heating element at a heating level that is higher than a heating level of the second heating element for a testing period, and monitoring the temperature associated with the cooking utensil during the testing period. The controller is configured for determining that the cooking utensil is located on the first heating element when a value of the monitored temperature is greater than a predefined threshold.