Patent ID: 11871500
Assignee: E.G.O. ELEKTRO-GERAETEBAU GMBH
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 0:
1. A method for heating at least one cooking vessel of a plurality of cooking vessels on a hob, said hob having a plurality of heating devices, wherein:
each said heating device has a heating region,
one said cooking vessel is arranged so as to cover said heating region,
each said heating device is designed to generate and transmit energy for heating said cooking vessel arranged above it and for said purpose is controlled by a power supply,
each said cooking vessel has a temperature sensor mounted on the base of the cooking vessel or inside the cooking vessel for collecting change in temperature on account of the transmission of energy for heating, together with an evaluation apparatus to evaluate the temporal profile of the temperature as temperature data to identify said cooking vessel, and a transmitting apparatus for transmitting said identification and temperature data, wherein said heating region of said heating device is at least partially covered by said cooking vessel,
a receiving device is provided for said hob for the purpose of receiving said identification and said temperature data from one said transmitting apparatus of said cooking vessel or from any other transmitting apparatuses of any other cooking vessels on said hob or in said receiving region of said receiving device,
a controller is provided for said hob, said controller receiving said identification and said temperature data from said receiving device and evaluates said identification and said temperature data with respect to information relating to a transmission of energy from said heating device,
wherein said method has the following steps:
at least one said cooking vessel is arranged above one said heating region of one said heating device,
at least one said heating device is controlled by said power supply in order to generate and transmit energy to said cooking vessel in a cycle, wherein a duration and/or a maximum value of said transmission of energy is/are varied in said cycle, wherein said variation in said cycle involves at least one of:
said maximum value of said transmitted energy varying over time,
said duration of said transmission of energy varying,
a duration between two said operations of transmitting said energy varying, or
a number of said operations of transmitting said energy varying,

said temperature sensor of said cooking vessel registers a change or an increase in a temperature value of said temperature on account of said transmission of energy, wherein a maximum value of said temperature value is 200° C.,
said evaluation apparatus of said cooking vessel evaluates the temporal profile of said temperature varying over time as the temperature data and transmits said identification and said temperature data to said receiving device by means of said transmitting apparatus,
said controller has or receives said identification and said temperature data from said transmitting apparatus and said receiving device of said cooking vessel,
said controller calculates:
as a first plausibility result, a relationship of said energy generated by said heating device with respect to said resulting temperature difference at said temperature sensor, wherein said relationship is a ratio calculated by dividing said energy generated by said heating device by said resulting temperature difference at said temperature sensor, wherein said first plausibility result is between 200 Wsec/° C. and 900 Wsec/° C., and
as a second plausibility result, a relationship of a first derivative after time of the energy generated by said heating device with respect to a maximum first derivative after time of said temperature at said temperature sensor, the maximum first derivative after time of said temperature being between 6° C./sec and 8.6° C./sec,

said first and said second plausibility results are buffered by said controller,
after each cycle, a change in an absolute temperature at said temperature sensor is checked for said received temperature data and said change is buffered by said controller as a third plausibility result,
said cycle of generating and transmitting energy is carried out at least twice in the same manner and said three plausibility results are each calculated and buffered during each carrying-out said operation and after each carrying-out said operation,
said controller carries out a plausibility check for each of said three plausibility results, during which a check is carried out in order to determine whether said respective plausibility result is in a plausibility range predefined for said result and stored in said controller,
wherein, if all three plausibility checks were positive, said cooking vessel with said identification is assigned to said heating device which previously generated and transmitted said energy,
wherein, if at least one said plausibility check was negative, said cooking vessel with said identification is not assigned to said heating device and/or is not assigned to any of said heating devices,
wherein said steps are carried out as a check for all said identifications and said temperature data of said cooking vessels having said temperature sensor, said evaluation apparatus and said transmitting apparatus that are received by said receiving device, and
wherein, if no check of said temperature data of one said cooking vessel was positive in all three said plausibility checks during at least two of said cycles, said controller assumes that no cooking vessel having one said temperature sensor together with one said evaluation apparatus and one said transmitting apparatus has been placed on said heating device.