Oven Bottom Panel Position Detection via Heating Rate Measurement
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Solution Overview
Problem
Improper positioning of the bottom panel in an oven appliance can lead to uneven or inconsistent heating of the cooking chamber, affecting the performance of the appliance.
Innovation Solution
A method and system that utilize a temperature sensor to measure temperatures at predetermined times during a cook cycle, calculate a heating rate, and determine the position of the bottom panel assembly based on this rate, without the need for a dedicated position sensor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a dedicated position sensor is used to detect bottom panel position, then measurement precision is improved, but device complexity and cost increase
Solution Approach 1:
The patent uses temperature as an intermediary parameter to indirectly detect bottom panel position. Instead of directly measuring position with a position sensor, the system measures temperature distribution and heating rate, which are affected by the bottom panel's position. This intermediary approach resolves the contradiction by achieving position detection without complex position sensing hardware.
Solution Approach 2:
The patent replaces the mechanical/electrical position sensing system with a thermal measurement system. By substituting the dedicated position sensor with temperature sensors and using thermal field characteristics to infer position, the system reduces device complexity while maintaining detection capability.
2Device complexity
If temperature measurement method is used to detect bottom panel position, then device complexity is reduced, but measurement precision may be affected by other temperature影响因素
Solution Approach 1:
The system continuously monitors temperature and heating rate, comparing actual measurements with expected values for different bottom panel positions. This feedback mechanism allows the system to distinguish position-related temperature variations from other thermal influences, maintaining measurement precision despite using a simpler detection method.
Solution Approach 2:
The patent changes the measurement parameter from direct position to heating rate and temperature distribution characteristics. By measuring how temperature changes over time (heating rate) rather than absolute temperature, the system creates a measurement that is more specific to bottom panel position and less sensitive to other thermal影响因素.
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 allows for accurate detection of improper bottom panel positioning, enabling the oven appliance to adjust cooking parameters or notify the user, thereby ensuring consistent heating and optimal cooking performance.
Implementation Method 1
One or more heat sources may be provided beneath the cooking chamber, e.g., along the vertical direction, to provide heat upward through a bottom panel of the cooking chamber
Data Source
AI summary
A method of operating an oven appliance may include a step of initiating a cook cycle of the oven appliance. The method may also include a step of measuring, with a temperature sensor, a first temperature of a cooking chamber, wherein the first temperature is measured at a first predetermined time. The method may further include a step of measuring, with the temperature sensor, a second temperature of the cooking chamber, wherein the second temperature is measured at a second predetermined time. The method may also include a step of calculating, based on the first temperature and the second temperature, a heating rate. The method may further include a step of determining, based on the calculated heating rate, a position of a bottom panel assembly.