Method for operating a hob, and hob
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Solution Overview
Problem
Existing hob technologies lack the ability to effectively maintain specific temperature states at an inductively heated cooking point, particularly for simmering or low-boiling liquids, where excessive bubbling is undesirable, and for searing processes requiring precise temperature control.
Innovation Solution
A method and hob design that allow operators to maintain desired temperature states by classifying the current state as either boiling point or a different temperature, using power supply adjustments to keep the temperature constant, and incorporating features like automatic shut-off and power density control to manage changes in cooking vessel conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If the hob continuously heats the cooking vessel to maintain temperature, then the desired cooking state is maintained, but energy consumption increases and excessive bubbling occurs
Solution Approach 1:
The hob applies periodic heating pulses instead of continuous heating. The control unit detects temperature changes and applies heating power only when the temperature drops below a threshold, creating a periodic heating pattern that maintains the cooking state while reducing overall energy consumption and preventing excessive bubbling.
Solution Approach 2:
The system uses feedback from temperature detection to control heating power. The control unit continuously monitors temperature changes in the cooking vessel and adjusts heating power accordingly, reducing power when temperature is stable and increasing power only when temperature drops, thereby optimizing energy usage while maintaining the desired cooking state.
2Speed
If the hob uses high power to quickly heat the cooking vessel, then heating speed is improved, but temperature control precision deteriorates
Solution Approach 1:
The heating power is dynamically adjusted based on real-time temperature detection. The system transitions from static high-power heating to dynamic power control, where the power level changes continuously according to the detected temperature state, enabling both rapid heating when needed and precise temperature maintenance when the target is reached.
Solution Approach 2:
The system changes the heating power parameter based on detected temperature conditions. When the cooking vessel reaches the desired temperature, the power parameter is reduced to a maintenance level; when temperature drops, power is increased again. This parameter adaptation enables both fast heating and precise temperature control.
3Stability of the object's composition
If the hob activates maintaining function immediately, then the current cooking state is preserved, but adaptability to different cooking conditions is reduced
Solution Approach 1:
The control unit performs preliminary detection and classification of the cooking state before activating the maintaining function. By first detecting temperature changes and classifying the cooking process type (boiling, simmering, searing, etc.), the system prepares the appropriate maintaining strategy in advance, ensuring both state preservation and adaptability to different cooking conditions.
Solution Approach 2:
The system automatically detects and classifies the cooking state without requiring manual operator input. The control unit monitors temperature changes and independently determines the appropriate maintaining function to apply, making the system adaptable to different cooking conditions while preserving the desired cooking state.
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 control over temperature and power supply to maintain desired cooking states, reducing energy consumption and preventing excessive bubbling, while ensuring consistent cooking results across various cooking processes.
Implementation Method 1
an inductively heated cooking point (20) with a cooking vessel (22) placed on it
Implementation Method 2
the cooking vessel is simply heated, advantageously is inductively heated
Implementation Method 3
the measurement variable which is correlated to the cooking vessel temperature is the period duration of the resonant circuit of this cooking point and/or another variable is derived from this
Data Source
AI summary
A method for operating a hob for maintaining a state, which exists at the time of activation of the maintaining operation, at a cooking point of the hob with a cooking vessel on it detects a change in temperature of the cooking vessel as a change in state, wherein supplied power and/or a change in temperature of the cooking vessel are evaluated. A maintaining function for maintaining the state, which is indicated at this time, at the cooking point with a cooking vessel placed on it can be triggered. In doing so, the current state at the cooking point is classified as a process at the boiling point of water on the one hand and as a process which is different therefrom or as a process which takes place at a different temperature without a phase transition of water on the other hand.