Cooktop Multi-Mode Heating Control for Precise Temperature Management
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Solution Overview
Problem
Current cooktops, including induction cooktops, lack precise control over cooking temperatures and often result in over-cooking due to limited temperature control options, and safety features like fuses can lead to unnecessary shutdowns below desired cooking temperatures.
Innovation Solution
A cooktop system with a controller that uses temperature sensors and user inputs to manage heating modes, power ranges, and fan control for precise temperature control and safety, including dual safety circuits for overheating prevention and pot detection methods.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a cooktop uses basic heating control without multiple modes, then the device complexity is reduced, but the temperature control precision and cooking efficiency deteriorate
Solution Approach 1:
The patent implements multiple heating control modes (thawing, low, medium, high, boiling) that dynamically adjust heating parameters based on cooking requirements. The controller switches between different power levels and heating rates depending on the selected mode, enabling precise temperature control for various cooking stages without requiring an overly complex system architecture.
Solution Approach 2:
The system changes key operating parameters including power level, heating rate, and target temperature based on the selected control mode. By pre-defining parameter sets for different modes (e.g., rapid heating for boiling vs. slow heating for thawing), the patent achieves precise temperature control while keeping the control logic manageable through parameterization rather than complex algorithms.
2Reliability
If a cooktop lacks overheating protection mechanisms, then the device complexity and cost are reduced, but the safety and reliability deteriorate
Solution Approach 1:
The patent incorporates temperature sensors that continuously monitor heating elements and cooking surfaces, feeding temperature data back to the controller. The controller compares actual temperatures against safe operating thresholds and automatically adjusts or shuts off heating when limits are approached, providing reliable overheating protection through closed-loop feedback control.
Solution Approach 2:
The system performs preliminary safety checks before initiating heating operations and continuously monitors during operation. By detecting potential overheating conditions early through temperature sensing and taking preventive action (reducing power or shutting down), the patent ensures safety without requiring complex post-failure protection mechanisms.
3Productivity
If a cooktop uses simple on/off control, then the ease of operation is improved, but the cooking efficiency and temperature management deteriorate
Solution Approach 1:
The patent provides multiple pre-configured heating modes (thawing, low, medium, high, boiling) that cover a wide range of cooking requirements. Each mode encapsulates optimized heating parameters for specific cooking tasks, allowing users to efficiently handle diverse cooking needs through a unified interface without requiring complex manual parameter adjustment.
Solution Approach 2:
The system pre-configures optimal heating parameters, power levels, and temperature profiles for each control mode before operation. Users simply select the desired mode rather than manually adjusting multiple parameters, and the system automatically applies the pre-optimized settings, thereby improving cooking efficiency while maintaining ease of operation.
4Reliability
If a cooktop lacks vessel detection capabilities, then the device complexity is reduced, but the safety and energy efficiency deteriorate
Solution Approach 1:
The patent replaces complex mechanical or optical vessel detection systems with electrical sensing methods. By detecting changes in electrical properties (such as impedance or current draw) when a vessel is placed on the heating surface, the system achieves reliable vessel detection and safety control through simple electrical measurements rather than complex mechanical or optical sensors.
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
Enables precise temperature control for various cooking styles and prevents overheating, ensuring safe operation and accurate detection of cooking vessels, thereby reducing the risk of over-cooking and improving cooking efficiency.
Implementation Method 1
a heating system associated with a cooking surface... The heating system may be an induction coil
Implementation Method 2
a temperature sensor adapted to measure a temperature associated with the cooking vessel
Implementation Method 3
A range of the average power level supplied to the heating system may be mapped to a first range of fan speeds... a fan system for cooling one or more appliance subsystems
Data Source
AI summary
A cooktop appliance apparatus for use in cooking includes a controller for controlling operation of the fan system based on an average power level supplied to a heating system, and based on a temperature measure associated with one or more subsystems. The appliance includes a hardware-implemented safety module having two or more temperature actuated safety circuits. The appliance includes a user interface adapted to receive a user input with respect to operating parameters of the heating system, the user input including a heating control mode and a set temperature. The appliance includes a controller adapted to identify a cooking vessel on an induction cooktop.