EP3560279B1 - Cooking appliance - Google Patents
Cooking appliance Download PDFInfo
- Publication number
- EP3560279B1 EP3560279B1 EP17822461.4A EP17822461A EP3560279B1 EP 3560279 B1 EP3560279 B1 EP 3560279B1 EP 17822461 A EP17822461 A EP 17822461A EP 3560279 B1 EP3560279 B1 EP 3560279B1
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- EP
- European Patent Office
- Prior art keywords
- operating state
- heating
- control unit
- heating element
- cooking appliance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000010411 cooking Methods 0.000 title claims description 84
- 238000010438 heat treatment Methods 0.000 claims description 227
- 230000006698 induction Effects 0.000 claims description 42
- 230000001419 dependent effect Effects 0.000 description 7
- 230000006870 function Effects 0.000 description 6
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000005294 ferromagnetic effect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000005291 magnetic effect Effects 0.000 description 1
- 238000007620 mathematical function Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000002441 reversible effect Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
- H05B6/12—Cooking devices
- H05B6/129—Cooking devices induction ovens
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B1/00—Details of electric heating devices
- H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
- H05B1/0227—Applications
- H05B1/0252—Domestic applications
- H05B1/0258—For cooking
- H05B1/0261—For cooking of food
- H05B1/0263—Ovens
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/02—Induction heating
- H05B6/06—Control, e.g. of temperature, of power
Definitions
- the invention relates to an induction cooking device according to claim 1.
- a cooking appliance device with a heating element is already known from the prior art, which heats an object in a heating operating state.
- the heating element is designed as an induction heating element and is part of a cooking appliance designed as a cooktop, which has the cooking appliance device.
- a sensor unit detects three electrical parameters outside of the heating operating state, namely an electric current flowing through the heating element in the heating operating state, an electrical voltage present at the heating element in the heating operating state and an electrical power supplied to the system in the heating operating state. Outside the heating operating state, the sensor unit transmits the detected electrical parameters to a control unit, which then determines a temperature of the object heated by the heating element.
- a control unit which then determines a temperature of the object heated by the heating element.
- an induction cooking appliance according to the preamble of claim 1 is known.
- the documents DE 198 52 617 A1 and JP 2006 228541A disclose further prior art induction cooking devices.
- the object of the invention is in particular to provide a generic device with improved properties with regard to temperature determination.
- the object is achieved according to the invention by the features of claim 1, while advantageous refinements and developments of the invention can be found in the dependent claims.
- An induction cooking appliance device is proposed, preferably an induction oven device, with at least one heating element, which is provided in at least one heating operating state for heating at least one object, and with a control unit, which is provided in the heating operating state from an impedance of the heating element and the Object comprehensive system to determine a temperature of the heated object by the heating element.
- a “cooking appliance device”, namely an “induction cooking appliance device”, advantageously an “oven device” and preferably an “induction oven device”, should in particular mean at least a part, in particular a subassembly, of a cooking appliance, specifically an induction cooking appliance, advantageously an oven and preferably an induction oven.
- a die Cooking appliance device having cooking appliance as a grill and/or as a steamer and/or as a microwave oven and/or as a hob and/or as an oven.
- a “heating element” should be understood to mean an element which is intended to convert electrical energy into heat and, in particular, to supply it to at least one object to be heated.
- the heating element is designed as an induction heating element and is preferably intended to generate an electromagnetic alternating field, in particular with a frequency between 17 kHz and 150 kHz, which is intended in particular to be heated in an object that is to be heated, in particular a metal, preferably ferromagnetic, by eddy current induction and/or Magnetic reversal effects to be converted into heat.
- the object to be heated could be, for example, a cooking utensil, which could be provided in particular for being placed on a hob plate of a hob.
- the object to be heated could be a cooking utensil, for example, which could be intended to be placed in a cooking chamber of a cooking appliance, such as an oven.
- the object to be heated consists in particular at least partially and advantageously at least to a large extent of a metal, in particular a ferromagnetic one. At least “to a large extent” should be understood to mean in particular a proportion of at least 70%, in particular at least 80%, advantageously at least 90% and preferably at least 95%.
- the cooking appliance device has at least one supply unit.
- the supply unit is intended in particular for connection to at least one mains power supply and/or to at least one household network, in particular to at least one phase of the mains power supply and/or the household network.
- the supply unit in the heating operating state, provides at least one high-frequency alternating current for the heating element, which is designed in particular as an induction heating element.
- the supply unit has in particular at least one inverter which, in the heating operating state, generates in particular the high-frequency alternating current for the heating element, which is in particular designed as an induction heating element.
- heating operating state is to be understood in particular as a state in which the control unit operates the heating element and this, in particular, object to be heated is heated.
- control unit controls the supply unit in the heating operating state and, by means of the supply unit, supplies electrical energy in the form of at least one high-frequency alternating current to the heating element designed as an induction heating element.
- control unit is to be understood in particular as an electronic unit which is preferably at least partially integrated in a control and/or regulating unit of a cooking appliance, in particular an induction cooking appliance, advantageously a baking oven and preferably an induction baking oven, and which is preferably provided for this purpose to control and/or regulate at least the supply unit and/or the heating element.
- the control unit comprises an arithmetic unit and, in particular, in addition to the arithmetic unit, a memory unit with a control and/or regulation program stored therein, which is intended to be executed by the arithmetic unit.
- the control unit is intended to determine the temperature of the object heated by the heating element during the heating of the object and in particular while avoiding switching off the supply unit and/or interrupting the heating of the object.
- Provided should be understood to mean, in particular, specially programmed, designed and/or equipped.
- the fact that an object is provided for a specific function is to be understood in particular to mean that the object fulfills and/or executes this specific function in at least one application and/or operating state.
- the configuration according to the invention makes it possible to achieve particularly advantageous properties with regard to temperature determination. Furthermore, in particular, a high level of operating convenience can be achieved.
- the temperature of the object can be determined precisely, as a result of which, in particular, simple control and/or little programming effort for the control unit and/or high performance can be achieved.
- there is no need to detect the temperature of the object by means of at least one temperature sensor, for example by means of at least one infrared sensor and/or by means of at least one resistance sensor.
- Indirect determination of the temperature of the object makes it possible in particular to dispense with at least one temperature sensor, as a result of which in particular low costs and/or low storage can/can be made possible.
- a high level of accuracy can be achieved independently of a value for the temperature of the object, since the accuracy is restricted, for example, by a restricted measurement range at least one sensor unit and/or at least one temperature sensor can be avoided.
- control unit is provided to take into account a frequency with which the control unit operates the heating element in the heating operating state when determining the temperature.
- the frequency is at least essentially and advantageously exactly identical to a frequency of the high-frequency alternating current, which the supply unit provides in particular in the heating operating state. In this way, in particular, errors due to fluctuations in the frequency that have not been taken into account can be avoided and/or a particularly precise determination of the temperature can be made possible.
- the cooking appliance device has at least one sensor unit, which is intended to detect at least one electrical parameter in the heating operating state and to transmit at least one sensor parameter characterizing the detected parameter to the control unit for determining the temperature.
- a “sensor unit” is to be understood in particular as meaning at least one unit which has at least one detector for detecting at least the electrical parameter and which is provided to output at least one sensor parameter characterizing the detected parameter.
- the sensor unit has at least one transmission module, which is provided to transmit the sensor parameter to the control unit, in particular to at least one reception module of the control unit, in the heating operating state.
- the control unit has at least one receiving module, which is provided to receive the sensor parameter in the heating operating state from the sensor unit, in particular from the transmission module of the sensor unit.
- the control unit is provided in particular for determining the impedance of the system comprising the heating element and the object from the sensor parameter received from the sensor unit and in particular for determining the temperature of the object heated by the heating element from this impedance.
- additional sensor units and/or temperature sensors can be dispensed with, as a result of which, in particular, low costs and/or low complexity can/can be achieved.
- the sensor unit could be provided to detect the frequency with which the control unit operates the heating element in the heating operating state in the heating operating state.
- the electrical parameter could in particular be the frequency with which the control unit operates the heating element in the heating mode.
- the control unit specifies the frequency in the heating operating state and, in particular, uses the frequency specified by the control unit in the heating operating state to determine the temperature of the object.
- the sensor unit is preferably provided to detect the electrical current flowing through the heating element in the heating operating state and/or the electrical voltage present at the heating element in the heating operating state and/or the electrical power supplied to the system in the heating operating state, and in particular in the form to transmit at least one sensor parameter to the control unit.
- the electrical parameter is an electrical current flowing through the heating element in the heating operating state and/or an electrical voltage present at the heating element in the heating operating state and/or electrical power supplied to the system in the heating operating state.
- the sensor unit could, for example, have at least one ammeter and/or at least one voltmeter and/or at least one power meter and/or at least one analog/digital converter.
- the electrical parameter can be detected in a particularly simple manner, as a result of which a low level of complexity can be made possible.
- the control unit is provided to take into account at least one inductance of the heating element, which is designed in particular as an induction heating element, in the heating operating state when determining the temperature.
- the sensor unit could be provided to detect at least one additional electrical parameter in the heating operating state and to transmit at least one additional sensor parameter characterizing the detected additional parameter to the control unit for determining the temperature.
- the additional electrical parameter could be the inductance of the heating element, which is designed in particular as an induction heating element.
- the control unit could be provided to determine the inductance of the heating element, which is designed in particular as an induction heating element, from the sensor parameter in the heating operating state.
- the control unit is provided to take into account at least one effective, in particular ohmic, resistance of the system in the heating operating state when determining the temperature.
- the additional electrical parameter could be the effective, in particular ohmic, resistance of the system.
- the control unit could be provided to determine the effective, in particular ohmic, resistance of the system from the sensor parameter in the heating operating state. In this way, in particular, a high level of accuracy can be made possible when determining the temperature.
- the control unit is provided to take into account at least one ratio between an effective, in particular ohmic, resistance of the system in the heating operating state and the impedance of the system in the heating operating state when determining the temperature.
- the additional electrical parameter could be the ratio between an effective, in particular ohmic, resistance of the system in the heating operating state and the impedance of the system.
- the control unit could be provided to determine the ratio between an effective, in particular ohmic, resistance of the system in the heating operating state and the impedance of the system from the sensor parameter in the heating operating state. In this way, in particular, a low error rate can be achieved when determining the temperature.
- the control unit has at least one storage unit and is intended to determine the temperature by comparing the impedance of the system with at least one dependence of an impedance on a temperature stored in the storage unit.
- the stored dependency could be stored in the form of at least one table in the memory unit and the control unit could be provided in particular to determine the temperature by assigning the impedance to at least one temperature stored in the table, which could be assigned to at least one corresponding and/or closest impedance value. to determine.
- the dependency could be stored in the memory unit in the form of at least one mathematical function in particular, and the control unit could be provided in particular to determine the temperature by calculating the temperature using the function at the given impedance.
- At least two, in particular at least four, advantageously at least eight, particularly advantageously at least twelve and preferably a large number of dependencies could be stored in the memory unit.
- Each dependency stored in the memory unit could be provided in particular for at least one given frequency and/or assigned to at least one given frequency with which the control unit in the heating mode the heating element could operate in particular.
- a high degree of accuracy can be achieved in particular when determining the temperature.
- the cooking appliance device could have the object, which could be embodied as a cooking utensil and in particular intended to be placed on a hob plate of a hob.
- the cooking appliance device preferably has the object which is designed as a muffle wall.
- the muffle wall could be designed, for example, as a muffle rear wall and/or as a muffle side wall and/or as a muffle top wall and/or as a muffle bottom wall.
- the cooking appliance device has at least one muffle, which in particular at least essentially forms the muffle wall.
- the cooking appliance device has in particular at least one appliance door which at least partially delimits the cooking space in the heating operating state.
- the muffle has at least one muffle rear wall and/or at least one muffle side wall, advantageously at least two muffle side walls, and/or at least one muffle top wall and/or at least one muffle bottom wall.
- the muffle delimits the cooking chamber in particular at least partially and advantageously at least essentially in the heating operating state together with the appliance door.
- the cooking chamber is provided in particular for the introduction of food to be cooked, such as food, for heating and/or for warming and/or for keeping the food to be cooked warm.
- the system made up of the heating element and the object heated by the heating element can in particular be precisely defined, as a result of which a high level of accuracy and/or a low error rate in determining the temperature can/can be made possible.
- the temperature can be determined exactly and/or with a minimum error rate for a given impedance for each frequency with which the control unit operates the heating element in particular.
- a particularly accurate temperature determination can be achieved in particular by an induction cooking appliance, preferably by an induction oven, with at least one induction cooking appliance device according to the invention, preferably with at least one induction oven device according to the invention.
- the temperature determination can be further improved by a method for operating a device according to the invention
- Induction cooking appliance device advantageously an induction oven device according to the invention, with at least one heating element, which is provided in at least one heating operating state for heating at least one object, wherein in the heating operating state a temperature of the object heated by the heating element is determined from an impedance of a system comprising the heating element and the object becomes.
- the induction cooking device should not be limited to the application and embodiment described above.
- the cooking appliance device can have a number of individual elements, components and units that differs from a number specified here in order to fulfill a function described herein.
- the cooking appliance 24 could be designed as a grill appliance and/or as a steamer appliance and/or as a microwave appliance and/or as a hob, with only induction cooking appliances being claimed.
- the cooking appliance 24 is designed as a baking oven, in particular as an induction baking oven.
- the cooking appliance device 10 is designed as a baking oven device, in particular as an induction baking oven device.
- the cooking appliance device 10 has a muffle 26 .
- the muffle 26 partially delimits a cooking space 28 .
- the muffle 26 essentially delimits the cooking chamber 28 together with a cooking appliance door 30 .
- the cooking appliance device 10 has the cooking appliance door 30 .
- the muffle 26 has a muffle bottom wall 32 , a muffle top wall 34 , two muffle side walls 36 , 38 and a muffle rear wall 40 .
- the cooking appliance device 10 has an operator interface 42 for entering and/or selecting operating parameters (cf. 1 ), for example a heating power and/or a heating power density and/or a heating zone.
- the operator interface 42 is provided for outputting a value of an operating parameter to an operator.
- the cooking appliance device 10 has a control unit 16 .
- the control unit 16 is provided to carry out actions and/or to change settings as a function of operating parameters entered by means of the user interface 42 .
- the control unit 16 regulates an energy supply to at least one heating element 12 (cf. 2 and 3 ).
- the cooking appliance device 10 has two heating elements 12 .
- the cooking appliance device 10 could in particular have a different number of heating elements 12 .
- the cooking appliance device 10 could have exactly one single heating element 12 .
- the cooking appliance device 10 could have at least three, in particular at least four, advantageously at least five and preferably a plurality of heating elements 12, for example.
- the heating elements 12 are arranged outside of the cooking space 28 .
- a lower heating element 12 of the heating elements 12 is in an installed position below the muffle bottom wall 32 arranged.
- the lower heating element 12 is arranged in a vicinity of the muffle bottom wall 32 .
- An upper heating element 12 of the heating elements 12 is arranged in an installed position above the muffle top wall 34 .
- the upper heating element 12 is arranged in a vicinity of the muffle top wall 34 . Only one of the heating elements 12 is described below.
- the heating element 12 is designed as an induction heating element. In the heating operating state, the heating element 12 is provided for heating an object 14 . In the heating operating state, the heating element 12 inductively heats the object 14 .
- the cooking appliance device 10 has the object 14 (cf. Figures 1 to 3 ).
- the object 14 is designed as a muffle wall.
- the object 14 is in the form of the muffle bottom wall 32 .
- the object is designed as the muffle top wall 34 .
- the cooking appliance device 10 has a supply unit 44 (cf. 3 ).
- the supply unit 44 is intended for connection to a household network 46 .
- the supply unit 44 provides a high-frequency alternating current with a frequency f for supplying the heating element 12 .
- control unit 16 controls the supply unit 44 to supply the heating element 12 .
- control unit 16 operates the heating element 12 by means of the supply unit 44 at the frequency f.
- the control unit 16 determines a temperature T of the object 14 heated by the heating element 12 from an impedance Z 0 of a system 18 comprising the heating element 12 and the object 14.
- the control unit 16 takes the frequency into account f, with which the control unit 16 operates the heating element 12 in the heating mode.
- control unit 16 determines the impedance Z 0 of the system 18 from sensor parameters. In the heating operating state, the control unit 16 receives the sensor parameters from a sensor unit 20 (cf. 1 ).
- the cooking appliance device 10 has the sensor unit 20 (cf. 1 ). In the heating operating state, the sensor unit 20 detects electrical parameters. In the present exemplary embodiment, the sensor unit 20 detects three electrical parameters. Following the detection of the electrical parameters, sensor unit 20 transmits a sensor parameter characterizing the corresponding detected parameter to control unit 16 in order to determine temperature T.
- the sensor unit 20 detects an electrical current I 0 flowing through the heating element 12 in the heating operating state (cf. Figures 3 and 4 ).
- the electrical parameter is an electrical current I 0 flowing through the heating element 12 in the heating operating state.
- the sensor unit 20 detects an electrical voltage V 0 present at the heating element 12 in the heating operating state (cf. Figures 3 and 4 ).
- the electrical parameter is an electrical voltage V 0 present at the heating element 12 in the heating operating state.
- the sensor unit 20 detects an electrical power Po supplied to the system 18 in the heating operating state (cf. Figures 3 and 4 ).
- the electrical parameter is an electrical power Po supplied to the system 18 in the heating operating state. Only one of the electrical parameters is described below.
- control unit 16 determines the impedance Z 0 of the system 18 from the electrical parameter 18 the temperature T of the object 14 heated by the heating element 12 is determined.
- the control unit 16 uses a formula that is dependent on the electrical parameter. From the determined impedance Z 0 of the system 18, the control unit 16 determines the temperature T of the object 14 in the heating operating state.
- the control unit 16 When determining the temperature T, the control unit 16 takes into account an inductance L eq of the heating element 12 in the heating operating state (cf. 3 ). From the electrical parameter, the control unit 16 determines the inductance L eq of the heating element 12 in the heating operating state. When determining the inductance L eq of the heating element 12, the control unit 16 uses a formula dependent on the electrical parameter.
- the control unit 16 When determining the temperature T, the control unit 16 takes into account an effective resistance R eq of the system 18 in the heating operating state (cf. 3 ). From the electrical parameter, the control unit 16 determines the effective resistance R eq of the system 18 in the heating operating state. In determining the effective resistance R eq of the system 18, the control unit 16 uses a formula dependent on the electrical parameter.
- C is a capacitance 48 of the system 18 (cf. 3 ).
- the quantity ⁇ is proportional to the frequency f with which the control unit 16 operates the heating element 12 in the heating operating state.
- control unit 16 determines the impedance Z 0 of the system 18 and the inductance L eq of the heating element 12 and the effective resistance R eq of the system 18 in the heating operating state Detect characteristic variable and transmit a corresponding number of further sensor parameters characterizing the further detected characteristic variable to control unit 16 .
- the additional electrical parameter could be, for example, the impedance Z 0 of the system 18 and/or the inductance L eq of the heating element 12 and/or the effective resistance R eq of the system 18 .
- the control unit 16 When determining the temperature T, the control unit 16 takes into account a ratio between the effective resistance R eq of the system 18 in the heating operating state and the impedance Z 0 of the system 18 in the heating operating state. In the present exemplary embodiment, the control unit 16 determines the relationship between the heating mode in the heating mode effective resistance R eq of the system 18 in the heating mode and the impedance Z 0 of the system 18 from the above formulas. Alternatively or additionally, the further electrical parameter could be the ratio between the effective resistance R eq of the system 18 in the heating operating state and the impedance Z 0 of the system 18, for example.
- the control unit 16 has a memory unit 22 (cf. 1 ) on.
- the control unit 16 determines the temperature T by comparing the impedance Z 0 of the system 18 with a dependence of an impedance Z 0 on a temperature stored in the storage unit 22 (cf. 5).
- figure 5 shows the dependency of an impedance Z 0 on a temperature at two different frequencies f 1 , f 2 .
- the frequency f 1 is essentially 110 kHz.
- the frequency f 2 is essentially 130 kHz.
- the temperature T of the object 14 depends on the impedance Z 0 of the system 18.
- the temperature T of the object 14 depends on the frequency f with which the control unit 16 operates the heating element 12 in the heating operating state.
- the temperature T of the object 14 is dependent on the inductance Leq of the heating element 12.
- the temperature T of the object 14 is dependent on the effective resistance Req of the system 18.
- the temperature T of the object 14 is dependent on the ratio between the effective resistance R eq of the system 18 in the heating mode and the impedance Z 0 of the system 18.
- control unit 16 adjusts the frequency f at which the control unit 16 operates the heating element 12 in the heating operating state. By adapting the frequency f with which the control unit 16 operates the heating element 12 in the heating operating state, the control unit 16 regulates a cooking chamber temperature prevailing in the cooking chamber 28 in the heating operating state.
- control unit 16 could use the electrical parameter, for example, to control and/or regulate a heating power density provided by the heating element 12 and/or a power supplied to the heating element 12 in the heating operating state.
- control unit 16 could use the electrical parameter to protect electrical and/or electronic units, for example.
- an operator enters an objective temperature T obj via the operator interface 42 (cf. 6 ).
- the control unit 16 could, for example, a use the objective temperature T obj , which could be defined and/or specified, for example, by a particularly automatic cooking program and/or by a cooking strategy and/or by a particularly selected function.
- the control unit 16 compares the objective temperature T obj and the temperature T of the object 14 with one another in a temperature control step 50 . Depending on the comparison of the objective temperature T obj and the temperature T of the object 14 , the control unit 16 determines an objective power P obj in the temperature control step 50 .
- the control unit 16 determines at least one modulation parameter from the objective power P obj in a power control step 52 .
- the modulation parameter could be the frequency f, for example, with which the control unit 16 operates the heating element 12 in the heating mode.
- the modulation parameter could be a duty cycle D, for example, with which the control unit 16 operates the heating element 12 in the heating operating state.
- control unit 16 operates the heating element 12 with the modulation parameter.
- control unit 16 transmits the modulation parameter to the supply unit 44.
- the supply unit 44 provides the objective power P obj by means of the modulation parameter.
- the sensor unit 20 detects at least one output signal from the supply unit 44.
- the output signal and the electrical parameter are in particular at least substantially and advantageously completely identical.
- the output signal is an electric current I 0 flowing through the heating element 12 in the heating operating state.
- the output signal is an electrical voltage V 0 present at the heating element 12 in the heating operating state.
- the output signal is an electrical power P 0 supplied to the system 18 in the heating mode.
- the sensor unit 20 transmits the electrical parameter to the control unit 16.
- the control unit 16 takes the electrical parameter into account in the power control step 52.
- the control unit 16 determines the temperature T of the object 14 in a temperature determination step 54.
Description
Die Erfindung betrifft eine Induktionsgargerätevorrichtung nach dem Anspruch 1.The invention relates to an induction cooking device according to
Aus dem Stand der Technik ist bereits eine Gargerätevorrichtung mit einem Heizelement bekannt, welche in einem Heizbetriebszustand ein Objekt erhitzt. Das Heizelement ist als ein Induktionsheizelement ausgebildet und Teil eines als Kochfeld ausgebildeten Gargeräts, welches die Gargerätevorrichtung aufweist. Eine Sensoreinheit detektiert außerhalb des Heizbetriebszustands drei elektrische Kenngrößen, und zwar einen in dem Heizbetriebszustand durch das Heizelement fließenden elektrischen Strom, eine in dem Heizbetriebszustand an dem Heizelement anliegende elektrische Spannung und eine in dem Heizbetriebszustand dem System zugeführte elektrische Leistung. Die Sensoreinheit übermittelt außerhalb des Heizbetriebszustands die detektierten elektrischen Kenngrößen an eine Steuereinheit, welche daraufhin eine Temperatur des von dem Heizelement erhitzten Objekts ermittelt. Zudem ist aus der Druckschrift
Die Aufgabe der Erfindung besteht insbesondere darin, eine gattungsgemäße Vorrichtung mit verbesserten Eigenschaften hinsichtlich einer Temperaturbestimmung bereitzustellen. Die Aufgabe wird erfindungsgemäß durch die Merkmale des Anspruchs 1 gelöst, während vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung den Unteransprüchen entnommen werden können.The object of the invention is in particular to provide a generic device with improved properties with regard to temperature determination. The object is achieved according to the invention by the features of
Es wird eine Induktionsgargerätevorrichtung, vorzugsweise eine Induktionsbackofenvorrichtung, mit zumindest einem Heizelement, welches in wenigstens einem Heizbetriebszustand zu einer Erhitzung zumindest eines Objekts vorgesehen ist, und mit einer Steuereinheit vorgeschlagen, welche dazu vorgesehen ist, in dem Heizbetriebszustand aus einer Impedanz eines das Heizelement und das Objekt umfassenden Systems eine Temperatur des von dem Heizelement erhitzten Objekts zu ermitteln. Unter einer "Gargerätevorrichtung", und zwar unter einer "Induktionsgargerätevorrichtung", vorteilhaft unter einer "Backofenvorrichtung" und vorzugsweise unter einer "Induktionsbackofenvorrichtung", soll insbesondere zumindest ein Teil, insbesondere eine Unterbaugruppe, eines Gargeräts, und zwar eines Induktionsgargeräts, vorteilhaft eines Backofens und vorzugsweise eines Induktionsbackofens, verstanden werden. Beispielsweise könnte ein die Gargerätevorrichtung aufweisendes Gargerät als ein Grillgerät und/oder als ein Dampfgargerät und/oder als ein Mikrowellengerät und/oder als ein Kochfeld und/oder als ein Backofen ausgebildet sein.An induction cooking appliance device is proposed, preferably an induction oven device, with at least one heating element, which is provided in at least one heating operating state for heating at least one object, and with a control unit, which is provided in the heating operating state from an impedance of the heating element and the Object comprehensive system to determine a temperature of the heated object by the heating element. A “cooking appliance device”, namely an “induction cooking appliance device”, advantageously an “oven device” and preferably an “induction oven device”, should in particular mean at least a part, in particular a subassembly, of a cooking appliance, specifically an induction cooking appliance, advantageously an oven and preferably an induction oven. For example, a die Cooking appliance device having cooking appliance as a grill and/or as a steamer and/or as a microwave oven and/or as a hob and/or as an oven.
Unter einem "Heizelement" soll in diesem Zusammenhang ein Element verstanden werden, welches dazu vorgesehen ist, elektrische Energie in Wärme umzuwandeln und insbesondere zumindest einem zu erhitzenden Objekt zuzuführen. Erfindungsgemäß ist das Heizelement als Induktionsheizelement ausgebildet und dabei vorzugsweise dazu vorgesehen, ein elektromagnetisches Wechselfeld insbesondere mit einer Frequenz zwischen 17 kHz und 150 kHz zu erzeugen, das insbesondere dazu vorgesehen ist, in einem insbesondere metallischen, vorzugsweise ferromagnetischen zu erhitzenden Objekt durch Wirbelstrominduktion und/oder Ummagnetisierungseffekte in Wärme umgewandelt zu werden.In this context, a “heating element” should be understood to mean an element which is intended to convert electrical energy into heat and, in particular, to supply it to at least one object to be heated. According to the invention, the heating element is designed as an induction heating element and is preferably intended to generate an electromagnetic alternating field, in particular with a frequency between 17 kHz and 150 kHz, which is intended in particular to be heated in an object that is to be heated, in particular a metal, preferably ferromagnetic, by eddy current induction and/or Magnetic reversal effects to be converted into heat.
Das zu erhitzende Objekt könnte beispielsweise ein Gargeschirr sein, welches insbesondere zu einem Aufstellen auf einer Kochfeldplatte eines Kochfelds vorgesehen sein könnte. Alternativ oder zusätzlich könnte das zu erhitzende Objekt beispielsweise ein Gargeschirr sein, welches zu einem Einbringen in einen Garraum eines Gargeräts, wie beispielsweise eines Backofens, vorgesehen sein könnte. Das zu erhitzende Objekt besteht insbesondere wenigstens teilweise und vorteilhaft wenigstens zu einem Großteil aus einem insbesondere ferromagnetischen Metall. Unter wenigstens "zu einem Großteil" soll insbesondere zu einem Anteil von mindestens 70 %, insbesondere zu mindestens 80 %, vorteilhaft zu mindestens 90 % und vorzugsweise zu mindestens 95 % verstanden werden.The object to be heated could be, for example, a cooking utensil, which could be provided in particular for being placed on a hob plate of a hob. Alternatively or additionally, the object to be heated could be a cooking utensil, for example, which could be intended to be placed in a cooking chamber of a cooking appliance, such as an oven. The object to be heated consists in particular at least partially and advantageously at least to a large extent of a metal, in particular a ferromagnetic one. At least “to a large extent” should be understood to mean in particular a proportion of at least 70%, in particular at least 80%, advantageously at least 90% and preferably at least 95%.
Insbesondere weist die Gargerätevorrichtung zumindest eine Versorgungseinheit auf. Die Versorgungseinheit ist insbesondere zu einem Anschluss an zumindest einen Netzstrom und/oder an zumindest ein Haushaltsnetz, insbesondere an zumindest eine Phase des Netzstroms und/oder des Haushaltsnetzes, vorgesehen. Insbesondere stellt die Versorgungseinheit in dem Heizbetriebszustand zumindest einen hochfrequenten Wechselstrom für das insbesondere als Induktionsheizelement ausgebildete Heizelement bereit. Die Versorgungseinheit weist insbesondere zumindest einen Wechselrichter auf, welcher in dem Heizbetriebszustand insbesondere den hochfrequenten Wechselstrom für das insbesondere als Induktionsheizelement ausgebildete Heizelement erzeugt.In particular, the cooking appliance device has at least one supply unit. The supply unit is intended in particular for connection to at least one mains power supply and/or to at least one household network, in particular to at least one phase of the mains power supply and/or the household network. In particular, in the heating operating state, the supply unit provides at least one high-frequency alternating current for the heating element, which is designed in particular as an induction heating element. The supply unit has in particular at least one inverter which, in the heating operating state, generates in particular the high-frequency alternating current for the heating element, which is in particular designed as an induction heating element.
Unter einem "Heizbetriebszustand" soll insbesondere ein Zustand verstanden werden, in welchem die Steuereinheit das Heizelement betreibt und dieses dadurch insbesondere das zu erhitzende Objekt erhitzt. Insbesondere steuert die Steuereinheit in dem Heizbetriebszustand die Versorgungseinheit an und führt mittels der Versorgungseinheit dem als Induktionsheizelement ausgebildeten Heizelement elektrische Energie in Form zumindest eines hochfrequenten Wechselstroms, zu.A "heating operating state" is to be understood in particular as a state in which the control unit operates the heating element and this, in particular, object to be heated is heated. In particular, the control unit controls the supply unit in the heating operating state and, by means of the supply unit, supplies electrical energy in the form of at least one high-frequency alternating current to the heating element designed as an induction heating element.
Unter einer "Steuereinheit" soll insbesondere eine elektronische Einheit verstanden wer-den, die vorzugsweise in einer Steuer- und/oder Regeleinheit eines Gargeräts, insbesondere eines Induktionsgargeräts, vorteilhaft eines Backofens und vorzugsweise eines Induktionsbackofens, wenigstens teilweise integriert ist und die vorzugsweise dazu vorgesehen ist, zumindest die Versorgungseinheit und/oder das Heizelement zu steuern und/oder zu regeln. Vorzugsweise umfasst die Steuereinheit eine Recheneinheit und insbesondere zusätzlich zur Recheneinheit eine Speichereinheit mit einem darin gespeicherten Steuer- und/oder Regelprogramm, das dazu vorgesehen ist, von der Recheneinheit ausgeführt zu werden.A "control unit" is to be understood in particular as an electronic unit which is preferably at least partially integrated in a control and/or regulating unit of a cooking appliance, in particular an induction cooking appliance, advantageously a baking oven and preferably an induction baking oven, and which is preferably provided for this purpose to control and/or regulate at least the supply unit and/or the heating element. Preferably, the control unit comprises an arithmetic unit and, in particular, in addition to the arithmetic unit, a memory unit with a control and/or regulation program stored therein, which is intended to be executed by the arithmetic unit.
Die Steuereinheit ist dazu vorgesehen, die Temperatur des von dem Heizelement erhitzten Objekts während der Erhitzung des Objekts und insbesondere unter Vermeidung eines Abschaltens der Versorgungseinheit und/oder einer Unterbrechung der Erhitzung des Objekts zu ermitteln.The control unit is intended to determine the temperature of the object heated by the heating element during the heating of the object and in particular while avoiding switching off the supply unit and/or interrupting the heating of the object.
Unter "vorgesehen" soll insbesondere speziell programmiert, ausgelegt und/oder ausgestattet verstanden werden. Darunter, dass ein Objekt zu einer bestimmten Funktion vorgesehen ist, soll insbesondere verstanden werden, dass das Objekt diese bestimmte Funktion in zumindest einem Anwendungs- und/oder Betriebszustand erfüllt und/oder ausführt.“Provided” should be understood to mean, in particular, specially programmed, designed and/or equipped. The fact that an object is provided for a specific function is to be understood in particular to mean that the object fulfills and/or executes this specific function in at least one application and/or operating state.
Durch die erfindungsgemäße Ausgestaltung können insbesondere vorteilhafte Eigenschaften hinsichtlich einer Temperaturbestimmung erreicht werden. Ferner kann insbesondere ein hoher Bedienkomfort erreicht werden. Insbesondere kann die Temperatur des Objekts genau ermittelt werden, wodurch insbesondere eine einfache Steuerung und/oder ein geringer Programmierungsaufwand der Steuereinheit und/oder eine hohe Leistungsfähigkeit erzielt werden können/kann. Auf eine Detektion der Temperatur des Objekts mittels zumindest eines Temperatursensors, wie beispielsweise mittels zumindest eines Infrarot-Sensors und/oder mittels zumindest eines Widerstandssensors, kann insbesondere verzichtet werden. Durch eine indirekte Ermittlung der Temperatur des Objekts kann insbesondere auf zumindest einen Temperatursensor verzichtet werden, wodurch insbesondere geringe Kosten und/oder eine geringe Lagerhaltung ermöglicht werden können/kann. Insbesondere kann unabhängig von einem Wert der Temperatur des Objekts eine hohe Genauigkeit erreicht werden, da eine Beschränkung der Genauigkeit beispielsweise durch einen eingeschränkten Messbereich zumindest einer Sensoreinheit und/oder zumindest eines Temperatursensors vermieden werden kann.The configuration according to the invention makes it possible to achieve particularly advantageous properties with regard to temperature determination. Furthermore, in particular, a high level of operating convenience can be achieved. In particular, the temperature of the object can be determined precisely, as a result of which, in particular, simple control and/or little programming effort for the control unit and/or high performance can be achieved. In particular, there is no need to detect the temperature of the object by means of at least one temperature sensor, for example by means of at least one infrared sensor and/or by means of at least one resistance sensor. Indirect determination of the temperature of the object makes it possible in particular to dispense with at least one temperature sensor, as a result of which in particular low costs and/or low storage can/can be made possible. In particular, a high level of accuracy can be achieved independently of a value for the temperature of the object, since the accuracy is restricted, for example, by a restricted measurement range at least one sensor unit and/or at least one temperature sensor can be avoided.
Ferner wird vorgeschlagen, dass die Steuereinheit dazu vorgesehen ist, bei der Ermittlung der Temperatur eine Frequenz, mit welcher die Steuereinheit in dem Heizbetriebszustand das Heizelement betreibt, zu berücksichtigen. Unter der Wendung, dass die Steuereinheit in dem Heizbetriebszustand das Heizelement "betreibt", soll insbesondere verstanden werden, dass die Steuereinheit in dem Heizbetriebszustand die Versorgungseinheit ansteuert und mittels der Versorgungseinheit dem Heizelement elektrische Energie, insbesondere in Form zumindest eines hochfrequenten Wechselstroms, zuführt. Insbesondere ist die Frequenz wenigstens im Wesentlichen und vorteilhaft genau identisch mit einer Frequenz des hochfrequenten Wechselstroms, welchen die Versorgungseinheit in dem Heizbetriebszustand insbesondere bereitstellt. Dadurch können insbesondere Fehler aufgrund von unberücksichtigten Schwankungen in der Frequenz vermieden und/oder eine besonders genaue Ermittlung der Temperatur ermöglicht werden.Furthermore, it is proposed that the control unit is provided to take into account a frequency with which the control unit operates the heating element in the heating operating state when determining the temperature. The phrase that the control unit "operates" the heating element in the heating operating state should be understood in particular to mean that the control unit controls the supply unit in the heating operating state and, by means of the supply unit, supplies electrical energy to the heating element, in particular in the form of at least one high-frequency alternating current. In particular, the frequency is at least essentially and advantageously exactly identical to a frequency of the high-frequency alternating current, which the supply unit provides in particular in the heating operating state. In this way, in particular, errors due to fluctuations in the frequency that have not been taken into account can be avoided and/or a particularly precise determination of the temperature can be made possible.
Zudem wird vorgeschlagen, dass die Gargerätevorrichtung zumindest eine Sensoreinheit aufweist, welche dazu vorgesehen ist, in dem Heizbetriebszustand zumindest eine elektrische Kenngröße zu detektieren und zumindest einen, die detektierte Kenngröße kennzeichnenden Sensorparameter an die Steuereinheit zu der Ermittlung der Temperatur zu übertragen. Unter einer "Sensoreinheit" soll insbesondere zumindest eine Einheit verstanden werden, welche zumindest einen Detektor zu einer Detektion wenigstens der elektrischen Kenngröße aufweist und welche dazu vorgesehen ist, zumindest einen, die detektierte Kenngröße kennzeichnenden Sensorparameter auszugeben. Insbesondere weist die Sensoreinheit zumindest ein Sendemodul auf, welches dazu vorgesehen ist, den Sensorparameter in dem Heizbetriebszustand an die Steuereinheit, insbesondere an zumindest ein Empfangsmodul der Steuereinheit, zu übertragen. Die Steuereinheit weist insbesondere zumindest ein Empfangsmodul auf, welches dazu vorgesehen ist, den Sensorparameter in dem Heizbetriebszustand von der Sensoreinheit, insbesondere von dem Sendemodul der Sensoreinheit, zu empfangen. Die Steuereinheit ist insbesondere dazu vorgesehen, aus dem von der Sensoreinheit empfangenen Sensorparameter die Impedanz des das Heizelement und das Objekt umfassenden Systems und aus dieser Impedanz insbesondere die Temperatur des von dem Heizelement erhitzten Objekts zu ermitteln. Dadurch kann insbesondere auf zusätzliche Sensoreinheiten und/oder Temperatursensoren verzichtet werden, wodurch insbesondere geringe Kosten und/oder eine geringe Komplexität erzielt werden können/kann.In addition, it is proposed that the cooking appliance device has at least one sensor unit, which is intended to detect at least one electrical parameter in the heating operating state and to transmit at least one sensor parameter characterizing the detected parameter to the control unit for determining the temperature. A “sensor unit” is to be understood in particular as meaning at least one unit which has at least one detector for detecting at least the electrical parameter and which is provided to output at least one sensor parameter characterizing the detected parameter. In particular, the sensor unit has at least one transmission module, which is provided to transmit the sensor parameter to the control unit, in particular to at least one reception module of the control unit, in the heating operating state. In particular, the control unit has at least one receiving module, which is provided to receive the sensor parameter in the heating operating state from the sensor unit, in particular from the transmission module of the sensor unit. The control unit is provided in particular for determining the impedance of the system comprising the heating element and the object from the sensor parameter received from the sensor unit and in particular for determining the temperature of the object heated by the heating element from this impedance. As a result, in particular, additional sensor units and/or temperature sensors can be dispensed with, as a result of which, in particular, low costs and/or low complexity can/can be achieved.
Beispielsweise könnte die Sensoreinheit dazu vorgesehen sein, in dem Heizbetriebszustand die Frequenz, mit welcher die Steuereinheit in dem Heizbetriebszustand das Heizelement betreibt, zu detektieren. Die elektrische Kenngröße könnte insbesondere die Frequenz sein, mit welcher die Steuereinheit in dem Heizbetriebszustand das Heizelement betreibt. Vorteilhaft gibt die Steuereinheit in dem Heizbetriebszustand die Frequenz vor und verwendet zu der Ermittlung der Temperatur des Objekts insbesondere die von der Steuereinheit in dem Heizbetriebszustand vorgegebene Frequenz. Vorzugsweise ist die Sensoreinheit dazu vorgesehen in dem Heizbetriebszustand den in dem Heizbetriebszustand durch das Heizelement fließender elektrischer Strom und/oder die in dem Heizbetriebszustand an dem Heizelement anliegende elektrische Spannung und/oder die in dem Heizbetriebszustand dem System zugeführte elektrische Leistung zu detektieren und insbesondere in Form zumindest eines Sensorparameters an die Steuereinheit zu übertragen. Insbesondere ist die elektrische Kenngröße ein in dem Heizbetriebszustand durch das Heizelement fließender elektrischer Strom und/oder eine in dem Heizbetriebszustand an dem Heizelement anliegende elektrische Spannung und/oder eine in dem Heizbetriebszustand dem System zugeführte elektrische Leistung. Die Sensoreinheit könnte beispielsweise zumindest ein Amperemeter und/oder zumindest ein Voltmeter und/oder zumindest ein Leistungsmessgerät und/oder zumindest einen Analog-Digital-Wandler aufweisen. Dadurch kann die elektrische Kenngrö-ße insbesondere in einfacher Weise detektiert werden, wodurch insbesondere eine geringe Komplexität ermöglicht werden kann.For example, the sensor unit could be provided to detect the frequency with which the control unit operates the heating element in the heating operating state in the heating operating state. The electrical parameter could in particular be the frequency with which the control unit operates the heating element in the heating mode. Advantageously, the control unit specifies the frequency in the heating operating state and, in particular, uses the frequency specified by the control unit in the heating operating state to determine the temperature of the object. In the heating operating state, the sensor unit is preferably provided to detect the electrical current flowing through the heating element in the heating operating state and/or the electrical voltage present at the heating element in the heating operating state and/or the electrical power supplied to the system in the heating operating state, and in particular in the form to transmit at least one sensor parameter to the control unit. In particular, the electrical parameter is an electrical current flowing through the heating element in the heating operating state and/or an electrical voltage present at the heating element in the heating operating state and/or electrical power supplied to the system in the heating operating state. The sensor unit could, for example, have at least one ammeter and/or at least one voltmeter and/or at least one power meter and/or at least one analog/digital converter. As a result, the electrical parameter can be detected in a particularly simple manner, as a result of which a low level of complexity can be made possible.
Ferner wird vorgeschlagen, dass die Steuereinheit dazu vorgesehen ist, bei der Ermittlung der Temperatur zumindest eine Induktivität des insbesondere als Induktionsheizelement ausgebildeten Heizelements in dem Heizbetriebszustand zu berücksichtigen. Beispielsweise könnte die Sensoreinheit dazu vorgesehen sein, in dem Heizbetriebszustand zumindest eine weitere elektrische Kenngröße zu detektieren und zumindest einen, die detektierte weitere Kenngröße kennzeichnenden weiteren Sensorparameter an die Steuereinheit zu der Ermittlung der Temperatur zu übertragen. Insbesondere könnte die weitere elektrische Kenngröße die Induktivität des insbesondere als Induktionsheizelement ausgebildeten Heizelements sein. Alternativ oder zusätzlich könnte die Steuereinheit dazu vorgesehen sein, in dem Heizbetriebszustand die Induktivität des insbesondere als Induktionsheizelement ausgebildeten Heizelements aus dem Sensorparameter zu ermitteln. Dadurch kann insbesondere ein von einer Netzspannung, an welche die Versorgungseinheit insbesondere angeschlossen ist, unabhängiger Wert zu der Ermittlung der Temperatur herangezogen werden, wodurch die Temperatur insbesondere exakt ermittelt werden kann.It is also proposed that the control unit is provided to take into account at least one inductance of the heating element, which is designed in particular as an induction heating element, in the heating operating state when determining the temperature. For example, the sensor unit could be provided to detect at least one additional electrical parameter in the heating operating state and to transmit at least one additional sensor parameter characterizing the detected additional parameter to the control unit for determining the temperature. In particular, the additional electrical parameter could be the inductance of the heating element, which is designed in particular as an induction heating element. Alternatively or additionally, the control unit could be provided to determine the inductance of the heating element, which is designed in particular as an induction heating element, from the sensor parameter in the heating operating state. As a result, a value that is independent of a mains voltage to which the supply unit is connected, in particular, can be used to determine the temperature, as a result of which the temperature can be determined in particular exactly.
Erfindungsgemäß wird vorgeschlagen, dass die Steuereinheit dazu vorgesehen ist, bei der Ermittlung der Temperatur zumindest einen effektiven insbesondere ohmschen Widerstand des Systems in dem Heizbetriebszustand zu berücksichtigen. Beispielsweise könnte die weitere elektrische Kenngröße der effektive insbesondere ohmsche Widerstand des Systems sein. Alternativ oder zusätzlich könnte die Steuereinheit dazu vorgesehen sein, in dem Heizbetriebszustand den effektiven insbesondere ohmschen Widerstand des Systems aus dem Sensorparameter zu ermitteln. Dadurch kann insbesondere eine hohe Genauigkeit bei der Ermittlung der Temperatur ermöglicht werden.According to the invention, it is proposed that the control unit is provided to take into account at least one effective, in particular ohmic, resistance of the system in the heating operating state when determining the temperature. For example, the additional electrical parameter could be the effective, in particular ohmic, resistance of the system. Alternatively or additionally, the control unit could be provided to determine the effective, in particular ohmic, resistance of the system from the sensor parameter in the heating operating state. In this way, in particular, a high level of accuracy can be made possible when determining the temperature.
Die Steuereinheit ist dazu vorgesehen, bei der Ermittlung der Temperatur zumindest ein Verhältnis zwischen einem effektiven insbesondere ohmschen Widerstand des Systems in dem Heizbetriebszustand und der Impedanz des Systems in dem Heizbetriebszustand zu berücksichtigen. Beispielsweise könnte die weitere elektrische Kenngröße das Verhältnis zwischen einem effektiven insbesondere ohmschen Widerstand des Systems in dem Heizbetriebszustand und der Impedanz des Systems sein. Alternativ oder zusätzlich könnte die Steuereinheit dazu vorgesehen sein, in dem Heizbetriebszustand das Verhältnis zwischen einem effektiven insbesondere ohmschen Widerstand des Systems in dem Heizbetriebszustand und der Impedanz des Systems aus dem Sensorparameter zu ermitteln. Dadurch kann insbesondere eine geringe Fehlerquote bei der Ermittlung der Temperatur erzielt werden. Die Steuereinheit weist zumindest eine Speichereinheit auf und ist dazu vorgesehen, die Temperatur durch Vergleich der Impedanz des Systems mit zumindest einer in der Speichereinheit hinterlegten Abhängigkeit einer Impedanz von einer Temperatur zu ermitteln. Beispielsweise könnte die hinterlegte Abhängigkeit in Form zumindest einer Tabelle in der Speichereinheit hinterlegt und die Steuerreinheit insbesondere dazu vorgesehen sein, die Temperatur durch Zuordnung der Impedanz zu zumindest einer in der Tabelle hinterlegten Temperatur, welche zumindest einem entsprechenden und/oder nächstgelegenen Impedanzwert zugeordnet sein könnte, zu ermitteln. Alternativ oder zusätzlich könnte die Abhängigkeit in Form zumindest einer insbesondere mathematischen Funktion in der Speichereinheit hinterlegt und die Steuereinheit insbesondere dazu vorgesehen sein, die Temperatur durch Berechnung der Temperatur mittels der Funktion bei der gegebenen Impedanz zu ermitteln. Insbesondere könnten in der Speichereinheit zumindest zwei, insbesondere zumindest vier, vorteilhaft zumindest acht, besonders vorteilhaft zumindest zwölf und vorzugsweise eine Vielzahl an Abhängigkeiten hinterlegt sein. Jede in der Speichereinheit hinterlegte Anhängigkeit könnte insbesondere für zumindest eine gegebene Frequenz vorgesehen und/oder zumindest einer gegebenen Frequenz zugeordnet sein, mit welcher die Steuereinheit in dem Heizbetriebszustand das Heizelement insbesondere betreiben könnte. Dadurch kann bei der Ermittlung der Temperatur insbesondere ein hohes Maß an Genauigkeit erzielt werden.The control unit is provided to take into account at least one ratio between an effective, in particular ohmic, resistance of the system in the heating operating state and the impedance of the system in the heating operating state when determining the temperature. For example, the additional electrical parameter could be the ratio between an effective, in particular ohmic, resistance of the system in the heating operating state and the impedance of the system. Alternatively or additionally, the control unit could be provided to determine the ratio between an effective, in particular ohmic, resistance of the system in the heating operating state and the impedance of the system from the sensor parameter in the heating operating state. In this way, in particular, a low error rate can be achieved when determining the temperature. The control unit has at least one storage unit and is intended to determine the temperature by comparing the impedance of the system with at least one dependence of an impedance on a temperature stored in the storage unit. For example, the stored dependency could be stored in the form of at least one table in the memory unit and the control unit could be provided in particular to determine the temperature by assigning the impedance to at least one temperature stored in the table, which could be assigned to at least one corresponding and/or closest impedance value. to determine. Alternatively or additionally, the dependency could be stored in the memory unit in the form of at least one mathematical function in particular, and the control unit could be provided in particular to determine the temperature by calculating the temperature using the function at the given impedance. In particular, at least two, in particular at least four, advantageously at least eight, particularly advantageously at least twelve and preferably a large number of dependencies could be stored in the memory unit. Each dependency stored in the memory unit could be provided in particular for at least one given frequency and/or assigned to at least one given frequency with which the control unit in the heating mode the heating element could operate in particular. As a result, a high degree of accuracy can be achieved in particular when determining the temperature.
Beispielsweise könnte die Gargerätevorrichtung das Objekt aufweisen, welches als ein Gargeschirr ausgebildet sein und insbesondere zu einem Aufstellen auf einer Kochfeldplatte eines Kochfelds vorgesehen sein könnte. Vorzugsweise weist die Gargerätevorrichtung das Objekt auf, welches als eine Muffelwandung ausgebildet ist. Die Muffelwandung könnte beispielsweise als eine Muffelrückwand und/oder als eine Muffelseitenwand und/oder als eine Muffeldeckenwand und/oder als eine Muffelbodenwand ausgebildet sein. Insbesondere weist die Gargerätevorrichtung zumindest eine Muffel auf, welche die Muffelwandung insbesondere wenigstens im Wesentlichen ausbildet. Die Gargerätevorrichtung weist insbesondere zumindest eine Gerätetür auf, welche den Garraum in dem Heizbetriebszustand wenigstens teilweise begrenzt. Die Muffel weist insbesondere zumindest eine Muffelrückwand und/oder zumindest eine Muffelseitenwand, vorteilhaft zumindest zwei Muffelseitenwände, und/oder zumindest eine Muffeldeckenwand und/oder zumindest eine Muffelbodenwand auf. Die Muffel begrenzt den Garraum insbesondere wenigstens teilweise und vorteilhaft in dem Heizbetriebszustand gemeinsam mit der Gerätetür wenigstens im Wesentlichen. Der Garraum ist insbesondere zu einer Einbringung von Gargut, wie beispielsweise Lebensmitteln, zu einer Erhitzung und/oder zu einer Erwärmung und/oder zu einem Warmhalten des Garguts vorgesehen. Dadurch kann das System aus Heizelement und von dem Heizelement erhitztem Objekt insbesondere genau definiert sein, wodurch insbesondere eine hohe Genauigkeit und/oder eine geringe Fehlerquote bei der Ermittlung der Temperatur ermöglicht werden können/kann. Insbesondere kann die Temperatur bei gegebener Impedanz für jede Frequenz, mit welcher die Steuereinheit insbesondere das Heizelement betreibt, exakt und/oder mit minimaler Fehlerquote ermittelt werden.For example, the cooking appliance device could have the object, which could be embodied as a cooking utensil and in particular intended to be placed on a hob plate of a hob. The cooking appliance device preferably has the object which is designed as a muffle wall. The muffle wall could be designed, for example, as a muffle rear wall and/or as a muffle side wall and/or as a muffle top wall and/or as a muffle bottom wall. In particular, the cooking appliance device has at least one muffle, which in particular at least essentially forms the muffle wall. The cooking appliance device has in particular at least one appliance door which at least partially delimits the cooking space in the heating operating state. In particular, the muffle has at least one muffle rear wall and/or at least one muffle side wall, advantageously at least two muffle side walls, and/or at least one muffle top wall and/or at least one muffle bottom wall. The muffle delimits the cooking chamber in particular at least partially and advantageously at least essentially in the heating operating state together with the appliance door. The cooking chamber is provided in particular for the introduction of food to be cooked, such as food, for heating and/or for warming and/or for keeping the food to be cooked warm. As a result, the system made up of the heating element and the object heated by the heating element can in particular be precisely defined, as a result of which a high level of accuracy and/or a low error rate in determining the temperature can/can be made possible. In particular, the temperature can be determined exactly and/or with a minimum error rate for a given impedance for each frequency with which the control unit operates the heating element in particular.
Eine besonders genaue Temperaturermittlung kann insbesondere erreicht werden durch ein Induktionsgargerät, vorzugsweise durch einen Induktionsbackofen, mit zumindest einer erfindungsgemäßen Induktionsgargerätevorrichtung, vorzugsweise mit zumindest einer erfindungsgemäßen Induktionsbackofenvorrichtung.A particularly accurate temperature determination can be achieved in particular by an induction cooking appliance, preferably by an induction oven, with at least one induction cooking appliance device according to the invention, preferably with at least one induction oven device according to the invention.
Die Temperaturermittlung kann insbesondere weiter verbessert werden durch ein Verfahren zum Betrieb einer erfindungsgemäßen Induktionsgargerätevorrichtung, vorteilhaft einer erfindungsgemäßen Induktionsbackofenvorrichtung, mit zumindest einem Heizelement, welches in wenigstens einem Heizbetriebszustand zu einer Erhitzung zumindest eines Objekts vorgesehen ist, wobei in dem Heizbetriebszustand aus einer Impedanz eines das Heizelement und das Objekt umfassenden Systems eine Temperatur des von dem Heizelement erhitzten Objekts ermittelt wird.In particular, the temperature determination can be further improved by a method for operating a device according to the invention Induction cooking appliance device, advantageously an induction oven device according to the invention, with at least one heating element, which is provided in at least one heating operating state for heating at least one object, wherein in the heating operating state a temperature of the object heated by the heating element is determined from an impedance of a system comprising the heating element and the object becomes.
Die Induktionsgargerätevorrichtung soll hierbei nicht auf die oben beschriebene Anwendung und Ausführungsform beschränkt sein. Insbesondere kann die Gargerätevorrichtung zu einer Erfüllung einer hierin beschriebenen Funktionsweise eine von einer hierin genannten Anzahl von einzelnen Elementen, Bauteilen und Einheiten abweichende Anzahl aufweisen.The induction cooking device should not be limited to the application and embodiment described above. In particular, the cooking appliance device can have a number of individual elements, components and units that differs from a number specified here in order to fulfill a function described herein.
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages result from the following description of the drawing. Exemplary embodiments of the invention are shown in the drawing. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into further meaningful combinations.
Es zeigen:
- Fig. 1
- ein Gargerät mit einer Gargerätevorrichtung in einem Heizbetriebszustand in einer schematischen Darstellung,
- Fig. 2
- ein vergrößerter Ausschnitt des Gargeräts mit der Gargerätevorrichtung in dem Heizbetriebszustand in einer schematischen Darstellung,
- Fig. 3
- eine Schaltskizze der Gargerätevorrichtung in einer schematischen Darstellung,
- Fig. 4
- ein Diagramm, in welchem eine in dem Heizbetriebszustand an dem Heizelement anliegende elektrische Spannung über einer Zeit und ein in dem Heizbetriebszustand durch das Heizelement fließender elektrischer Strom über der Zeit dargestellt sind, in einer schematischen Darstellung,
- Fig. 5
- ein Diagramm, in welchem für zwei verschiedene Frequenzen jeweils eine Abhängigkeit einer Impedanz von einer Temperatur dargestellt ist, in einer schematischen Darstellung und
- Fig. 6
- ein Ablaufdiagramm eines Verfahrens zum Betrieb der Gargerätevorrichtung in einer schematischen Darstellung.
- 1
- a cooking appliance with a cooking appliance device in a heating operating state in a schematic representation,
- 2
- an enlarged section of the cooking appliance with the cooking appliance device in the heating mode in a schematic representation,
- 3
- a circuit diagram of the cooking appliance device in a schematic representation,
- 4
- a diagram in which an electrical voltage applied to the heating element in the heating operating state over time and an electrical current flowing through the heating element in the heating operating state over time are shown in a schematic representation,
- figure 5
- a diagram in which a dependence of an impedance on a temperature is shown for two different frequencies, in a schematic representation and
- 6
- a flowchart of a method for operating the cooking appliance device in a schematic representation.
Im vorliegenden Ausführungsbeispiel ist das Gargerät 24 als ein Backofen, insbesondere als ein Induktionsbackofen, ausgebildet. Die Gargerätevorrichtung 10 ist als eine Backofenvorrichtung, insbesondere als eine Induktionsbackofenvorrichtung, ausgebildet.In the present exemplary embodiment, the
Die Gargerätevorrichtung 10 weist eine Muffel 26 auf. Die Muffel 26 begrenzt einen Garraum 28 teilweise. Die Muffel 26 begrenzt den Garraum 28 gemeinsam mit einer Gargerätetür 30 im Wesentlichen. Die Gargerätevorrichtung 10 weist die Gargerätetür 30 auf.The
Die Muffel 26 weist eine Muffelbodenwand 32, eine Muffeldeckenwand 34, zwei Muffelseitenwände 36, 38 und eine Muffelrückwand 40 auf. Die Muffelbodenwand 32, die Muffeldeckenwand 34, die Muffelseitenwände 36, 38 und die Muffelrückwand 40 definieren gemeinsam mit der Gargerätetür 30 den Garraum 28 im Wesentlichen.The
Die Gargerätevorrichtung 10 weist eine Bedienerschnittstelle 42 zu einer Eingabe und/oder Auswahl von Betriebsparametern auf (vgl.
Die Gargerätevorrichtung 10 weist eine Steuereinheit 16 auf. Die Steuereinheit 16 ist dazu vorgesehen, in Abhängigkeit von mittels der Bedienerschnittstelle 42 eingegebenen Betriebsparametern Aktionen auszuführen und/oder Einstellungen zu verändern. Die Steuereinheit 16 regelt in einem Heizbetriebszustand eine Energiezufuhr zu zumindest einem Heizelement 12 (vgl.
Im vorliegenden Ausführungsbeispiel weist die Gargerätevorrichtung 10 zwei Heizelemente 12 auf. Alternativ könnte die Gargerätevorrichtung 10 insbesondere eine andere Anzahl an Heizelementen 12 aufweisen. Beispielsweise könnte die Gargerätevorrichtung 10 genau ein einziges Heizelement 12 aufweisen. Alternativ könnte die Gargerätevorrichtung 10 beispielsweise zumindest drei, insbesondere zumindest vier, vorteilhaft zumindest fünf und vorzugsweise mehrere Heizelemente 12 aufweisen.In the present exemplary embodiment, the
In einem Betriebszustand sind die Heizelemente 12 außerhalb des Garraums 28 angeordnet. Ein unteres Heizelement 12 der Heizelemente 12 ist in einer Einbaulage unterhalb der Muffelbodenwand 32 angeordnet. Das untere Heizelement 12 ist in einem Nahbereich der Muffelbodenwand 32 angeordnet.In one operating state, the
Ein oberes Heizelement 12 der Heizelemente 12 ist in einer Einbaulage oberhalb der Muffeldeckenwand 34 angeordnet. Das obere Heizelement 12 ist in einem Nahbereich der Muffeldeckenwand 34 angeordnet. Im Folgenden wird lediglich eines der Heizelemente 12 beschrieben.An
Das Heizelement 12 ist als ein Induktionsheizelement ausgebildet. In dem Heizbetriebszustand ist das Heizelement 12 zu einer Erhitzung eines Objekts 14 vorgesehen. Das Heizelement 12 erhitzt in dem Heizbetriebszustand das Objekt 14 induktiv.The
Die Gargerätevorrichtung 10 weist das Objekt 14 auf (vgl.
Die Gargerätevorrichtung 10 weist eine Versorgungseinheit 44 auf (vgl.
Die Steuereinheit 16 steuert in dem Heizbetriebszustand die Versorgungseinheit 44 zu einer Versorgung des Heizelements 12 an. In dem Heizbetriebszustand betreibt die Steuereinheit 16 das Heizelement 12 mittels der Versorgungseinheit 44 mit der Frequenz f.In the heating operating state, the
In dem Heizbetriebszustand ermittelt die Steuereinheit 16 aus einer Impedanz Z0 eines das Heizelement 12 und das Objekt 14 umfassenden Systems 18 eine Temperatur T des von dem Heizelement 12 erhitzten Objekts 14. Bei der Ermittlung der Temperatur T des Objekts 14 berücksichtigt die Steuereinheit 16 die Frequenz f, mit welcher die Steuereinheit 16 in dem Heizbetriebszustand das Heizelement 12 betreibt.In the heating operating state, the
Im vorliegenden Ausführungsbeispiel ermittelt die Steuereinheit 16 die Impedanz Z0 des Systems 18 aus Sensorparametern. In dem Heizbetriebszustand empfängt die Steuereinheit 16 die Sensorparameter von einer Sensoreinheit 20 (vgl.
Die Gargerätevorrichtung 10 weist die Sensoreinheit 20 auf (vgl.
In dem Heizbetriebszustand detektiert die Sensoreinheit 20 einen in dem Heizbetriebszustand durch das Heizelement 12 fließenden elektrischen Strom I0 (vgl.
In dem Heizbetriebszustand detektiert die Sensoreinheit 20 eine in dem Heizbetriebszustand an dem Heizelement 12 anliegende elektrische Spannung V0 (vgl.
In dem Heizbetriebszustand detektiert die Sensoreinheit 20 eine in dem Heizbetriebszustand dem System 18 zugeführte elektrische Leistung Po (vgl.
In einem Verfahren zum Betrieb der Gargerätevorrichtung 10 ermittelt die Steuereinheit 16 aus der elektrischen Kenngröße die Impedanz Z0 des Systems 18. In dem Verfahren wird durch die Steuereinheit 16 in dem Heizbetriebszustand aus einer Impedanz Z0 des das Heizelement 12 und das Objekt 14 umfassenden Systems 18 die Temperatur T des von dem Heizelement 12 erhitzten Objekts 14 ermittelt.In a method for operating the
Bei der Ermittlung der Impedanz Z0 verwendet die Steuereinheit 16 eine von der elektrischen Kenngröße anhängige Formel. Aus der ermittelten Impedanz Z0 des Systems 18 ermittelt die Steuereinheit 16 in dem Heizbetriebszustand die Temperatur T des Objekts 14.When determining the impedance Z 0 , the
Bei der Ermittlung der Temperatur T berücksichtigt die Steuereinheit 16 eine Induktivität Leq des Heizelements 12 in dem Heizbetriebszustand (vgl.
Bei der Ermittlung der Temperatur T berücksichtigt die Steuereinheit 16 einen effektiven Widerstand Req des Systems 18 in dem Heizbetriebszustand (vgl.
Die Steuereinheit 16 verwendet in dem Heizbetriebszustand bei der Ermittlung der Impedanz Z0 des Systems 18 und bei der Ermittlung der Induktivität Leq des Heizelements 12 und bei der Ermittlung des effektiven Widerstands Req des Systems 18 nachfolgend angegebene Formeln:
Hierbei ist C eine Kapazität 48 des Systems 18 (vgl.
Im vorliegenden Ausführungsbeispiel ermittelt die Steuereinheit 16 in dem Heizbetriebszustand die Impedanz Z0 des Systems 18 und die Induktivität Leq des Heizelements 12 und den effektiven Widerstand Req des Systems 18. Alternativ oder zusätzlich könnte die Sensoreinheit 20 in dem Heizbetriebszustand beispielsweise zumindest eine weitere elektrische Kenngröße detektieren und eine entsprechende Anzahl an weiteren, die weitere detektierte Kenngröße kennzeichnenden Sensorparametern an die Steuereinheit 16 übertragen. Die weitere elektrische Kenngröße könnte beispielsweise die Impedanz Z0 des Systems 18 und/oder die Induktivität Leq des Heizelements 12 und/oder der effektive Widerstand Req des Systems 18 sein.In the present exemplary embodiment, the
Bei der Ermittlung der Temperatur T berücksichtigt die Steuereinheit 16 ein Verhältnis zwischen dem effektiven Widerstand Req des Systems 18 in dem Heizbetriebszustand und der Impedanz Z0 des Systems 18 in dem Heizbetriebszustand. Im vorliegenden Ausführungsbeispiel ermittelt die Steuereinheit 16 in dem Heizbetriebszustand das Verhältnis zwischen dem effektiven Widerstand Req des Systems 18 in dem Heizbetriebszustand und der Impedanz Z0 des Systems 18 aus den oben genannten Formeln. Alternativ oder zusätzlich könnte die weitere elektrische Kenngröße beispielsweise das Verhältnis zwischen dem effektiven Widerstand Req des Systems 18 in dem Heizbetriebszustand und der Impedanz Z0 des Systems 18 sein.When determining the temperature T, the
Die Steuereinheit 16 weist eine Speichereinheit 22 (vgl.
Die Temperatur T des Objekts 14 ist abhängig von der Impedanz Z0 des Systems 18. Die Temperatur T des Objekts 14 ist abhängig von der Frequenz f, mit welcher die Steuereinheit 16 in dem Heizbetriebszustand das Heizelement 12 betreibt. Die Temperatur T des Objekts 14 ist abhängig von der Induktivität Leq des Heizelements 12. Die Temperatur T des Objekts 14 ist abhängig von dem effektiven Widerstand Req des Systems 18. Die Temperatur T des Objekts 14 ist abhängig von dem Verhältnis zwischen dem effektiven Widerstand Req des Systems 18 in dem Heizbetriebszustand und der Impedanz Z0 des Systems 18.The temperature T of the
Die Steuereinheit 16 passt in Abhängigkeit der ermittelten Temperatur T des Objekts 14 die Frequenz f an, mit welcher die Steuereinheit 16 in dem Heizbetriebszustand das Heizelement 12 betreibt. Durch die Anpassung der Frequenz f, mit welcher die Steuereinheit 16 in dem Heizbetriebszustand das Heizelement 12 betreibt, regelt die Steuereinheit 16 in dem Heizbetriebszustand eine in dem Garraum 28 herrschende Garraumtemperatur.Depending on the determined temperature T of the
In dem Heizbetriebszustand könnte die Steuereinheit 16 die elektrische Kenngröße beispielsweise zu einer Steuerung und/oder Regelung einer von dem Heizelement 12 bereitgestellten Heizleistungsdichte und/oder einer dem Heizelement 12 in dem Heizbetriebszustand zugeführten Leistung verwenden. Alternativ oder zusätzlich könnte die Steuereinheit 16 die elektrische Kenngröße beispielsweise zu einem Schutz elektrischer und/oder elektronischer Einheiten verwenden.In the heating operating state, the
In dem Verfahren gibt ein Bediener eine objektive Temperatur Tobj mittels der Bedienerschnittstelle 42 ein (vgl.
In dem Heizbetriebszustand vergleicht die Steuereinheit 16 in einem Temperaturkontrollschritt 50 die objektive Temperatur Tobj und die Temperatur T des Objekts 14 miteinander. In Abhängigkeit des Vergleichs der objektiven Temperatur Tobj und der Temperatur T des Objekts 14 ermittelt die Steuereinheit 16 in dem Temperaturkontrollschritt 50 eine objektive Leistung Pobj.In the heating operating state, the
Die Steuereinheit 16 ermittelt in dem Heizbetriebszustand in einem Leistungskontrollschritt 52 aus der objektiven Leistung Pobj zumindest einen Modulationsparameter. Der Modulationsparameter könnte beispielsweise die Frequenz f sein, mit welcher die Steuereinheit 16 in dem Heizbetriebszustand das Heizelement 12 betreibt. Alternativ oder zusätzlich könnte der Modulationsparameter beispielsweise ein Tastgrad D sein, mit welcher die Steuereinheit 16 in dem Heizbetriebszustand das Heizelement 12 betreibt.In the heating operating state, the
In dem Heizbetriebszustand betreibt die Steuereinheit 16 das Heizelement 12 mit dem Modulationsparameter. Die Steuereinheit 16 überträgt in dem Heizbetriebszustand den Modulationsparameter an die Versorgungseinheit 44. Die Versorgungseinheit 44 stellt in dem Heizbetriebszustand mittels des Modulationsparameters die objektive Leistung Pobj bereit.In the heating mode, the
Die Sensoreinheit 20 detektiert in dem Heizbetriebszustand zumindest ein Ausgangssignal der Versorgungseinheit 44. Das Ausgangssignal und die elektrische Kenngröße sind insbesondere wenigstens im Wesentlichen und vorteilhaft vollständig identisch. Im vorliegenden Ausführungsbeispiel ist das Ausgangssignal ein in dem Heizbetriebszustand durch das Heizelement 12 fließender elektrischer Strom I0. Das Ausgangssignal ist eine in dem Heizbetriebszustand an dem Heizelement 12 anliegende elektrische Spannung V0. Das Ausgangssignal ist eine in dem Heizbetriebszustand dem System 18 zugeführte elektrische Leistung P0.In the heating operating state, the
In dem Heizbetriebszustand überträgt die Sensoreinheit 20 die elektrische Kenngröße an die Steuereinheit 16. Die Steuereinheit 16 berücksichtigt die elektrische Kenngröße in dem Leistungskontrollschritt 52. Die Steuereinheit 16 ermittelt in dem Heizbetriebszustand in einem Temperaturermittlungsschritt 54 die Temperatur T des Objekts 14.In the heating operating state, the
- 1010
- Gargerätevorrichtungcooking appliance device
- 1212
- Heizelementheating element
- 1414
- Objektobject
- 1616
- Steuereinheitcontrol unit
- 1818
- Systemsystem
- 2020
- Sensoreinheitsensor unit
- 2222
- Speichereinheitstorage unit
- 2424
- Gargerätcooking appliance
- 2626
- Muffelmuffle
- 2828
- Garraumcooking chamber
- 3030
- Gargerätetürcooking appliance door
- 3232
- Muffelbodenwandmuffle bottom wall
- 3434
- Muffeldeckenwandmuffle ceiling wall
- 3636
- Muffelseitenwandmuffle side wall
- 3838
- Muffelseitenwandmuffle side wall
- 4040
- Muffelrückwandmuffle rear wall
- 4242
- Bedienerschnittstelleoperator interface
- 4444
- Versorgungseinheitsupply unit
- 4646
- Haushaltsnetzhousehold network
- 4848
- Kapazitätcapacity
- 5050
- Temperaturkontrollschritttemperature control step
- 5252
- Leistungskontrollschrittperformance control step
- 5454
- Temperaturermittlungsschritttemperature determination step
- TT
- Temperaturtemperature
- ff
- Frequenzfrequency
- I0I0
- StromElectricity
- V0V0
- SpannungTension
- P0P0
- LeistungPerformance
- Z0Z0
- Impedanzimpedance
- LeqLeq
- Induktivitätinductance
- Reqreq
- Effektiver Widerstandeffective resistance
Claims (9)
- Induction cooking appliance apparatus with at least one heating element (12), which in at least one heating operating state is provided to heat at least one object (14), and with a control unit (16), which is provided in the heating operating state to ascertain, from an impedance (Z0) of a system (18) comprising the heating element (12) and the object (14), a temperature (T) of the object (14) heated by the heating element (12), characterised in that the control unit (16) has at least one storage unit (22) and is provided to ascertain the temperature (T) by comparing the impedance (Z0) of the system (18) with at least one dependency of an impedance upon a temperature, which is stored in the storage unit (22), wherein the control unit (16) is provided, when ascertaining the temperature (T), to take into consideration at least one ratio between an effective resistance (Req) of the system (18) in the heating operating state and the impedance (Z0) of the system (18) in the heating operating state.
- Induction cooking appliance apparatus according to claim 1, characterised in that the control unit (16) is provided, when ascertaining the temperature (T), to take into consideration a frequency (f) at which the control unit (16) operates the heating element (12) in the heating operating state.
- Induction cooking appliance apparatus according to one of the preceding claims, characterised by at least one sensor unit (20), which is provided, in the heating operating state, to detect at least one electrical characteristic variable and to transfer at least one sensor parameter that characterises the detected characteristic variable to the control unit (16) to ascertain the temperature.
- Induction cooking appliance apparatus according to claim 3, characterised in that the sensor unit (20) is provided, in the heating operating state, to detect the electrical current (I0) flowing through the heating element (12) in the heating operating state.
- Induction cooking appliance apparatus according to claim 3 or 4, characterised in that the sensor unit (20) is provided, in the heating operating state, to detect the electrical voltage (V0) applied at the heating element (12) in the heating operating state.
- Induction cooking appliance apparatus according to one of claims 3 to 5, characterised in that the sensor unit (20) is provided, in the heating operating state, to detect the electrical power (P0) supplied to the system (18) in the heating operating state.
- Induction cooking appliance apparatus according to one of the preceding claims, characterised in that the control unit (16) is provided, when ascertaining the temperature (T), to take into consideration at least one inductance (Leq) of the heating element (12) in the heating operating state.
- Induction cooking appliance apparatus according to one of the preceding claims, characterised by the object (14), which is embodied as a muffle wall.
- Induction cooking appliance with at least one induction cooking appliance apparatus (10) according to one of the preceding claims.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ES201631674 | 2016-12-23 | ||
PCT/IB2017/057818 WO2018116057A1 (en) | 2016-12-23 | 2017-12-12 | Cooking appliance |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3560279A1 EP3560279A1 (en) | 2019-10-30 |
EP3560279B1 true EP3560279B1 (en) | 2023-06-07 |
Family
ID=60857139
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17822461.4A Active EP3560279B1 (en) | 2016-12-23 | 2017-12-12 | Cooking appliance |
Country Status (2)
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EP (1) | EP3560279B1 (en) |
WO (1) | WO2018116057A1 (en) |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110236411A (en) | 2017-08-09 | 2019-09-17 | 沙克忍者运营有限责任公司 | Cooking system |
USD914447S1 (en) | 2018-06-19 | 2021-03-30 | Sharkninja Operating Llc | Air diffuser |
USD883015S1 (en) | 2018-08-09 | 2020-05-05 | Sharkninja Operating Llc | Food preparation device and parts thereof |
USD903413S1 (en) | 2018-08-09 | 2020-12-01 | Sharkninja Operating Llc | Cooking basket |
USD934027S1 (en) | 2018-08-09 | 2021-10-26 | Sharkninja Operating Llc | Reversible cooking rack |
USD883014S1 (en) | 2018-08-09 | 2020-05-05 | Sharkninja Operating Llc | Food preparation device |
US11751710B2 (en) | 2019-02-25 | 2023-09-12 | Sharkninja Operating Llc | Guard for cooking system |
US11033146B2 (en) | 2019-02-25 | 2021-06-15 | Sharkninja Operating Llc | Cooking device and components thereof |
USD918654S1 (en) | 2019-06-06 | 2021-05-11 | Sharkninja Operating Llc | Grill plate |
USD982375S1 (en) | 2019-06-06 | 2023-04-04 | Sharkninja Operating Llc | Food preparation device |
US20210121012A1 (en) | 2020-03-30 | 2021-04-29 | Sharkninja Operating Llc | Cooking device and components thereof |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19818831C2 (en) * | 1998-04-27 | 2003-11-13 | Hubert Eric Walter | Method, device and container for heating pre-prepared meals |
DE19852617A1 (en) * | 1998-11-14 | 2000-01-20 | Aeg Hausgeraete Gmbh | A domestic oven with inductive heating elements positioned outside one or more of the walls of the oven at magnetically transparent thermally conductive areas |
ES2246640B1 (en) * | 2003-05-15 | 2006-11-01 | Bsh Electrodomesticos España, S.A. | TEMPERATURE REGULATION FOR AN INDUITED HEATING HEATER ELEMENT. |
JP2006228541A (en) * | 2005-02-17 | 2006-08-31 | Matsushita Electric Ind Co Ltd | Induction heating device |
-
2017
- 2017-12-12 WO PCT/IB2017/057818 patent/WO2018116057A1/en unknown
- 2017-12-12 EP EP17822461.4A patent/EP3560279B1/en active Active
Also Published As
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WO2018116057A1 (en) | 2018-06-28 |
EP3560279A1 (en) | 2019-10-30 |
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