Method for heating a cooking vessel on a hob, and hob
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Solution Overview
Problem
Existing hob systems face challenges in accurately identifying and assigning smart cooking vessels with temperature sensors to the appropriate heating devices, leading to inefficiencies in heating and temperature control.
Innovation Solution
A method where each heating device on the hob generates and transmits energy in a specific pattern, and the smart cooking vessel with a temperature sensor and evaluation apparatus transmits identification and temperature data, allowing a controller to perform plausibility checks to ensure accurate assignment based on temperature changes and energy ratios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a smart cooking vessel with temperature sensor and transmitting apparatus is used, then temperature control and identification capability are improved, but device complexity increases
Solution Approach 1:
The cooking vessel is equipped with its own temperature sensor, evaluation apparatus, and transmitting apparatus, enabling it to autonomously measure its own temperature and communicate with the hob controller. This self-service approach allows the vessel to actively participate in the identification and temperature control process, improving measurement precision while distributing system complexity to the vessel rather than concentrating it all in the hob.
Solution Approach 2:
The temperature sensor continuously monitors the vessel temperature and feeds this information back to the evaluation apparatus, which processes the data and transmits it to the hob controller. This feedback loop enables precise temperature control by allowing the system to adjust heating based on real-time temperature measurements, resolving the contradiction between improved control precision and increased complexity.
2Measurement precision
If energy is transmitted in a specific pattern with coding for identification, then vessel identification accuracy is improved, but energy transmission complexity increases
Solution Approach 1:
The hob controller transmits energy in periodic cycles rather than continuously. During each cycle, energy is transmitted in specific patterns with coding that the cooking vessel's receiving apparatus can detect and decode for identification. This periodic action with coded patterns improves identification accuracy while managing transmission complexity through structured, repeating sequences rather than complex continuous modulation.
Solution Approach 2:
Before heating begins, the hob controller performs an identification phase where energy is transmitted in specific coded patterns to detect and identify the cooking vessel. This preliminary action establishes the vessel's identity and capabilities before the main heating process, allowing the system to adapt subsequent energy transmission to the identified vessel type, thereby improving accuracy while containing complexity in a separate preliminary phase.
3Reliability
If plausibility checks are performed to ensure accurate assignment, then assignment reliability is improved, but processing time increases
Solution Approach 1:
The system performs a limited set of essential plausibility checks rather than exhaustive verification. The hob controller checks whether the detected vessel type matches the identified vessel and whether the temperature sensor readings are within expected ranges for the detected vessel. This partial verification approach provides sufficient reliability for accurate assignment while minimizing the time penalty by avoiding overly complex or redundant checks.
4Measurement precision
If temperature sensor is integrated in the cooking vessel, then temperature measurement accuracy is improved, but manufacturing complexity increases
Solution Approach 1:
The temperature sensor in the cooking vessel base serves multiple functions: it measures the temperature of the vessel base for control purposes, detects the presence of the vessel on the hob, and provides data for identification algorithms. This multi-functionality justifies the additional manufacturing complexity by providing several benefits from a single integrated component, improving measurement accuracy while offsetting manufacturing concerns through functional consolidation.
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 method enables reliable detection and assignment of smart cooking vessels to the correct heating devices, ensuring efficient heating and temperature control, while preventing misassignment and improving the reliability of automatic cooking programs.
Implementation Method 1
an induction heating coil which is controlled by power electronics with a variable power level
Implementation Method 2
a radiation heating device which is directly connected to mains voltage and is operated with clocking using relays
Data Source
AI summary
A method for heating a cooking vessel on a hob with a plurality of heating devices is described. Each heating device has a heating region in which a cooking vessel can be arranged in order to be heated by the heating device under the control of a power supply. The cooking vessel has a temperature sensor together with an evaluation apparatus and a transmitting apparatus for transmitting an identification and temperature data. A controller controls the heating device in a specific manner and evaluates the received temperature data using a plurality of plausibility checks in order to determine whether said data match the operation of the heating device. If these plausibility checks are passed, the cooking vessel is assigned to the heating device.