EP3737210A1 - Dispositif de four à induction - Google Patents

Dispositif de four à induction Download PDF

Info

Publication number: EP3737210A1
Authority: EP; European Patent Office
Prior art keywords: heating; inductor; control unit; operating state; induction furnace
Prior art date: 2019-05-10
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.): Granted

Application number

EP20172309.5A

Other languages

German (de)

English (en)

Other versions

EP3737210B1 (fr

Inventor

Laura Conejos Cantin

Jose Maria De La Cuerda Ortin

Alberto Dominguez Vicente

Carlos Obon Abadia

Luis Sanroman Hernandez

Fernando Sanz Serrano

Virginia Torres Leon

Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

BSH Hausgeraete GmbH

Original Assignee

BSH Hausgeraete GmbH

Priority date (The priority date 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 date listed.)

2019-05-10

Filing date

2020-04-30

Publication date

2020-11-11

2020-04-30 Application filed by BSH Hausgeraete GmbH filed Critical BSH Hausgeraete GmbH

2020-11-11 Publication of EP3737210A1 publication Critical patent/EP3737210A1/fr

2022-08-31 Application granted granted Critical

2022-08-31 Publication of EP3737210B1 publication Critical patent/EP3737210B1/fr

Status Active legal-status Critical Current

2040-04-30 Anticipated expiration legal-status Critical

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Classifications

- 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
- 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 furnace device according to the preamble of claim 1 and a method for operating an induction furnace device according to the preamble of claim 15.
An induction furnace device is already known from the prior art, which has an inductor and a further inductor.
a supply unit of the induction furnace device has a heating frequency unit which is assigned to the inductor and a further heating frequency unit which is assigned to the further inductor.
a control unit operates the inductor by means of the heating frequency unit and the further inductor by means of the further heating frequency unit continuously, in each case with a heating power of a maximum of 1.8 kW.
the object of the invention is in particular to provide a device of the generic type with improved properties in terms of ease of use.
the object is achieved according to the invention by the features of claims 1 and 15, while advantageous embodiments and developments of the invention can be found in the subclaims.
the invention is based on an induction furnace device with at least one inductively heatable heating element, with at least one control unit and with at least one inductor, which is provided for inductive heating of the heating element.
control unit operates the inductor in a pulsed manner in a heating operating state.
Such a configuration can in particular achieve a high level of operating convenience.
a high level of efficiency can be achieved, specifically in particular with regard to a heating time and / or the energy required for heating.
a high degree of flexibility with regard to an operation of the inductor can be achieved be made possible, since in particular a pulse duration and / or a cycle duration can be selected flexibly.
An “induction furnace device” should be understood to mean in particular at least a part, in particular a subassembly, of an induction furnace.
An "oven” is to be understood in particular as a unit which has at least one muffle which delimits and / or defines at least one cooking space, and which is provided in particular to provide energy for the purpose of heating at least one item to be cooked in the cooking space.
An “induction oven” is to be understood in particular as an oven which is provided for inductive provision of energy for the purpose of heating the food to be cooked in the cooking space.
the induction oven could for example have an induction grill and / or an induction baking oven and / or an induction stove.
the induction oven could be designed as an induction grill and / or as an induction oven and / or as an induction cooker.
the induction furnace device has in particular at least one muffle which in particular at least partially defines and / or delimits at least one cooking space.
the muffle has at least one cooking space wall which at least partially defines and / or delimits the cooking space.
At least one cooking chamber wall of the muffle could, for example, be a rear wall and / or a side wall and / or a bottom wall and / or a top wall.
the expression that an object defines and / or delimits the cooking space “at least partially” is to be understood in particular to mean that the object defines and / or delimits the cooking space alone or together with at least one further object.
the further object could, for example, be an appliance door and / or another cooking chamber wall.
an "inductively heatable" heating element is to be understood in particular as a heating element which is provided for inductive reception of energy and which, depending on the inductively received energy, provides heating energy in an operating state for heating the food to be cooked in the cooking space.
the heating element could provide the heating energy inductively.
the heating element could advantageously provide the heating energy in the form of heat.
the heating element could be a function of heat the inductively received energy and provide the heating energy in the form of heat, in particular caused by the inductively received energy.
heating element is to be understood as meaning in particular an element which is provided in an operating state for, in particular inductively, receiving energy and which is provided in an operating state to supply energy to at least one item to be cooked for the purpose of heating the item to be cooked.
the heating element differs from cooking utensils and / or from a cooking tray and / or from a baking sheet and / or from a grating and / or from a fat collecting tray.
the heating element could have at least a partial area of at least one cooking space wall and / or be designed at least as a partial area of at least one cooking space wall.
the heating element could, for example, be designed in the form of sheet metal and in particular be arranged in the vicinity of at least one cooking chamber wall and in particular at least a large part within the cooking chamber.
the heating element could at least for the most part be formed from at least one inductively heatable material.
the heating element could, for example, be made at least to a large extent from at least one ferromagnetic material, such as iron.
“At least a large part” is to be understood as meaning in particular a proportion, in particular a mass proportion and / or a volume proportion and / or a proportion of a number of at least 70%, in particular of at least 80%, advantageously of at least 90% and preferably of at least 95% will.
the control unit is in particular an electronic unit which, in an operating state, controls and / or regulates in particular at least the inductor and in particular at least one further inductor and / or at least one supply unit.
the control unit has in particular at least one processing unit and in particular in addition to the processing unit at least one memory unit in which in particular at least one control and / or regulating program is stored, which is provided in particular for execution by the processing unit.
the inductor provides energy, in particular inductively, and transmits the energy provided, in particular inductively, at least to the heating element.
the inductor has at least one coil and in an operating state, in particular by means of the coil, provides inductive energy, in particular for inductive energy transmission, advantageously at least to the heating element.
the inductor inductively transmits energy to the heating element at least in a partial time interval of the heating operating state and heats the heating element by means of the inductively provided energy in particular in the partial time interval of the heating operating state.
a “heating operating state” is to be understood in particular as an operating state in which the control unit heats at least one object, in particular the cooking space and / or the heating element and / or food, from at least one initial temperature to at least one target temperature, which is in particular significantly greater than the starting temperature.
the set temperature is at least 1.1 times, in particular at least 1.2 times, advantageously at least 1.5 times, particularly advantageously at least 2 times, preferably at least 3 times, particularly preferably at least 5 times and particularly preferably at least 8 - times as high as the starting temperature.
the starting temperature has in particular a value of a maximum of 200 ° C., in particular a maximum of 150 ° C., advantageously a maximum of 120 ° C., particularly advantageously a maximum of 100 ° C., preferably a maximum of 80 ° C., particularly preferably a maximum of 50 ° C. and especially preferably from a maximum of 30 ° C.
the starting temperature has a value which at least essentially corresponds to room temperature.
the heating operating state is in particular free of interruptions, in particular for the purpose of heating the food to be cooked.
the control unit guides the heating element on average over a proportion of at least 20%, in particular at least 25%, advantageously at least 30%, particularly advantageously at least 35%, preferably at least 40% and particularly preferably at least 45% a total duration of the heating operating state and thus increases in particular a temperature of the heating element.
the induction furnace device in particular in addition to the heating element, has at least one further heating element.
the control unit leads in particular at least one object, in particular the heating element and / or the further heating element, on average over a proportion of at least 40%, in particular of at least 50%, advantageously of at least 60%, particularly advantageously of at least 70%, preferably at least 80% and particularly preferably at least 90% of a total duration of the heating-up operating state and thus in particular increases a temperature of the object, in particular of the heating element and / or of the further heating element.
the induction furnace device has at least one supply unit which in particular has at least one heating frequency unit and which, in particular by means of the heating frequency unit, provides in particular energy, in particular in the form of high-frequency alternating current.
the expression that the control unit "operates" an object, in particular the inductor and / or the further inductor, in a pulsed manner is to be understood in particular as meaning that the control unit controls the supply unit and supplies the object with energy, in particular by means of the supply unit, whereupon the object in particular provides additional energy, in particular in inductive form, depending on the energy supplied.
control unit operates the inductor "pulsed" in the heating-up operating state is to be understood in particular as meaning that the control unit operates the inductor in the heating-up operating state in at least one time sub-interval and deactivates it in at least one further time sub-interval which differs from the time sub-interval .
control unit operates the inductor discontinuously and / or not continuously in the heating operating state.
the control unit could operate the inductor, and in particular the further inductor, in the heating operating state, in particular by means of multiplexing.
a frequency with which the control unit operates and / or deactivates the inductor and / or the further inductor in the heating operating state is significantly greater than a switching frequency of the heating frequency unit by means of which the control unit operates the inductor and / or the further inductor.
a time sub-interval t 1 in which the control unit operates the inductor in the heating-up operating state takes in particular a value of at least 1 ms, in particular of at least 5 ms, advantageously of at least 8 ms, particularly advantageously of at least 10 ms, preferably of at least 15 ms and particularly preferably from at least 20 ms.
a time sub-interval t 1 in which the control unit operates the inductor in the heating-up mode takes in particular a value of a maximum of 300 s, in particular a maximum of 200 s, advantageously a maximum of 180 s, particularly advantageously a maximum of 150 s, preferably a maximum of 120 s and particularly preferably from a maximum of 100 s.
Another time sub-interval t 2 in which the control unit operates the further inductor in the heating-up operating state, takes in particular a value of at least 1 ms, in particular of at least 5 ms, advantageously of at least 8 ms, particularly advantageously of at least 10 ms, preferably of at least 15 ms and particularly preferably from at least 20 ms.
a further time sub-interval t 2 in which the control unit operates the further inductor in the heating-up operating state, in particular takes a value of a maximum of 300 s, in particular a maximum of 200 s, advantageously a maximum of 180 s, particularly advantageously a maximum of 150 s, preferably a maximum 120 s and particularly preferably from a maximum of 100 s.
Provided is to be understood in particular as specifically programmed, designed and / or equipped.
the fact that an object is provided for a specific function should 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.
control unit could operate the inductor irregularly in the heating operating state.
the control unit advantageously operates the inductor regularly in the heating-up operating state.
the control unit preferably operates the inductor and, in particular, the further inductor, cyclically with at least one cycle duration.
the cycle duration comprises the time sub-interval t 1 and in particular the further time sub-interval t 2 .
the control unit operates the inductor and in particular the further inductor in a regularly recurring sequence.
the Control unit in the heating-up operating state after the cycle duration has elapsed, in particular directly and / or avoiding a break, a further cycle duration.
Cyclic should be understood to mean, in particular, regularly and / or periodically. In this way, in particular, a particularly simple control and / or a low programming effort for the control unit can be achieved, as a result of which in particular low costs and thus in particular a high level of operator satisfaction can be achieved.
the cycle duration in at least one time interval of the heating-up operating state has a value of at least 10 ms, in particular of at least 15 ms, advantageously of at least 20 ms, particularly advantageously of at least 30 ms, preferably of at least 40 ms and particularly preferably of at least 60 ms.
the cycle duration in at least one time interval of the heating-up operating state in particular in the time interval of the heating-up operating state, has a value of a maximum of 600 s, in particular a maximum of 500 s, advantageously a maximum of 400 s, particularly advantageously a maximum of 300 s, preferably a maximum of 250 s and particularly preferably from a maximum of 200 s.
the cycle duration can be selected in particular optimally and / or flexibly, whereby in particular optimal and / or flexible heating of the heating element can be made possible.
control unit determine the cycle duration in the heating-up operating state as a function of at least one current heating parameter in relation to at least one reference heating parameter.
the control unit determines the cycle duration in particular as a function of a ratio of the current heating parameter to the reference heating parameter and advantageously as a function of a distance between the current heating parameter and the reference heating parameter.
the reference heating parameter and the current heating parameter correspond to one another.
the current heating parameter, and in particular the reference heating parameter could for example be a temperature and / or a heating power and / or a heating power density and / or a heating stage and / or a heating duration.
the control unit could receive the reference heating parameter from at least one external unit, for example.
the external unit could be an external database and / or a cell phone and / or a tablet and / or be a computer.
the control unit could have at least one memory unit in which, in particular, the reference heating parameter could be stored.
the control unit could receive the reference heating parameter, for example, from at least one operator interface, in particular as a function of at least one operator input.
the induction furnace device in particular has at least one and advantageously at least the operator interface, which is provided in particular for an input and / or operating input of at least one operating parameter, such as the reference heating parameter and / or a heating level and / or a heating power and / or a heating duration.
the induction furnace device has in particular at least one sensor unit which is provided in particular for detecting the current heating parameter.
the sensor unit could be arranged at least partially within the cooking space.
the sensor unit could, for example, have at least one detector which, in particular, could be arranged within the cooking space and, in particular, could be provided to detect the current heating parameter.
the current heating parameter, and in particular the reference heating parameter could for example have a heating power and / or a heating line density and / or a heating stage and / or a heating duration.
the current heating parameter, and in particular the reference heating parameter preferably has a temperature and is in particular designed as a temperature.
the reference heating parameter has at least one setpoint temperature and is in particular designed as a setpoint temperature. In particular, a simple and / or transparent determination of the cycle duration can thereby be achieved.
control unit operates the inductor, and in particular the further inductor, with a shorter cycle time in the heating-up operating state, the smaller the difference between the reference heating parameter and the current heating parameter, in particular to avoid flicker.
control unit selects the cycle duration to be greater the greater the distance between the current heating parameter and the reference heating parameter.
the control unit operates the inductor, and in particular the further inductor, in the heating-up operating state with the greater the heating power, the greater the difference between the reference heating parameter and the current heating parameter.
the control unit operates the inductor, and in particular the further inductor, in the heating mode, with a longer cycle duration, the greater the difference between the reference heating parameter and the current heating parameter.
a particularly high level of operating convenience can in particular be achieved in this way.
a flicker standard can be complied with.
the induction furnace device has at least one further heating element and at least one further inductor, in particular at least the further inductor, which is provided in particular for inductive heating of the further heating element and which the control unit operates in pulsed mode in the heating-up mode.
the control unit operates the further inductor in the heating operating state cyclically with at least one cycle duration, in particular with the cycle duration, in a pulsed manner.
the inductor and the further inductor are arranged on opposite sides of the cooking chamber and / or the muffle.
the inductor is assigned to the heating element and the further inductor is assigned to the further heating element.
the heating element and the further heating element are in particular arranged on opposite sides of the cooking space and / or the muffle. In this way, in particular, a high level of efficiency and / or a short heating-up time can be achieved, as a result of which in particular a high level of operating convenience can be achieved.
the control unit could operate the inductor and the further inductor in a pulsed manner at least in sections at the same time.
the control unit preferably operates the inductor and the further inductor alternately and, in particular, pulsed without overlap.
“Alternating” is to be understood in particular as alternating and / or alternating. In particular, this enables a particularly efficient design.
a particularly short heating time and / or a high temperature of the Heating element and / or the further heating element can be made possible, since the inductor, and in particular the further inductor, can be operated with increased power, in particular in a respective time sub-interval.
the induction furnace device have at least one supply unit and at least one switching unit, by means of which the control unit optionally electrically connects the inductor or the further inductor to the supply unit in the heating operating state.
the supply unit has, in particular in addition to the heating frequency unit, at least one further heating frequency unit which is provided in particular to provide energy, in particular in the form of high-frequency alternating current.
the heating frequency unit is assigned in particular to the inductor.
the further heating frequency unit is assigned to the further inductor.
the switching unit is in particular arranged electrically between the supply unit and the inductor and / or the further inductor.
the switching unit is provided to establish and / or separate an electrically conductive connection between the supply unit and the inductor and / or the further inductor, in particular as a function of an activation signal from the control unit.
a “switching unit” is to be understood in particular as a unit which is provided to change a current-conducting property when a switching position is changed.
the switching unit could, for example, have at least one switching element which, for example, has at least one relay and / or at least one transistor and in particular could be designed as a relay and / or as a transistor.
the switching unit in a first switching position of the switching element, the switching unit could interrupt a first conduction path and in particular prevent a current flow via the first conduction path.
the switching unit could, for example, close the first conduction path in a second switching position of the switching element and in particular permit and / or enable a current flow via the first conduction path.
a high degree of flexibility can thereby be achieved.
due to a long cycle duration in particular a small number of switching operations of the switching unit can be achieved, which in particular enables a long service life and / or low material wear.
there can be a low noise level in particular due to a low number of Switching operations, can be achieved, whereby in particular a particularly high level of operating convenience can be achieved.
control unit switches the switching unit, in particular exclusively, in a currentless state in the heating-up operating state.
the control unit switches the switching unit in particular in the heating-up operating state, in particular exclusively, within a switching time interval in which the control unit in particular deactivates and / or interrupts a provision of energy by the supply unit.
the control unit could interrupt at least one electrical connection between the supply unit and a mains voltage in the switching time interval, for example by switching at least one input switching unit.
the induction furnace device could for example have at least one and advantageously at least the input switching unit, which could be arranged in particular electrically between a mains voltage and the supply unit and by means of which the control unit could in particular establish and / or disconnect an electrical connection between the mains voltage and the supply unit.
the control unit could, for example, deactivate the heating frequency unit and in particular the further heating frequency unit in the switching time interval and thus in particular deactivate and / or interrupt the provision of energy by the supply unit.
the switching time interval t Rsw in which the control unit deactivates and / or interrupts the provision of energy by the supply unit, takes in particular a value of at least 0.1 ms, in particular of at least 0.2 ms, advantageously of at least 0.5 ms, particularly advantageously from at least 0.8 ms, preferably from at least 1 ms and particularly preferably from at least 2 ms.
the switching time interval t Rsw in which the control unit deactivates and / or interrupts the provision of energy by the supply unit, takes a value of a maximum of 100 ms, in particular a maximum of 80 ms, advantageously a maximum of 60 ms, particularly advantageously a maximum of 50 ms, preferably from a maximum of 40 ms and particularly preferably from a maximum of 30 ms.
a long-lasting design and / or low material wear can be made possible, as a result of which an operator can be provided with a functional design, in particular over an extremely long period of time.
the inductor and / or the further inductor be provided to provide upper heat and / or lower heat.
the inductor could for example be arranged below the muffle and the further inductor in particular above the muffle.
the inductor could be arranged in an installation position above the muffle and the further inductor, in particular, below the muffle. In this way, a high level of efficiency and / or a particularly high level of operating convenience can be achieved in particular.
control unit in the heating operating state, the inductor, in particular in the time sub-interval t 1 , with a heating power of at least 1.5 kW, in particular of at least 1.8 kW, advantageously of at least 2 kW, particularly advantageously of at least 2, 5 kW, preferably of at least 3 kW and particularly preferably of at least 3.5 kW.
control unit operates the further inductor in the heating-up mode, in particular in the further time sub-interval t 2 , with a heating power of at least 1.5 kW, in particular at least 1.8 kW, advantageously at least 2 kW, particularly advantageously at least 2.5 kW, preferably of at least 3 kW and particularly preferably of at least 3.5 kW.
this enables a particularly short heating-up time and / or a high temperature of the heating element and / or the further heating element, since the inductor, and in particular the further inductor, can be operated with increased power, in particular in a time sub-interval.
the heating element could, for example, be arranged within the cooking space and in particular in a vicinity of the cooking space wall.
the induction furnace device preferably has at least one and advantageously at least the cooking chamber wall which at least for the most part defines the heating element.
the heating element is designed as at least a partial area of the cooking space wall and is defined and / or formed by at least a partial area of the cooking space wall.
the cooking chamber wall which in particular at least largely defines the heating element, is in particular a top wall and / or a bottom wall.
the induction furnace device has, in particular, at least one further cooking chamber wall which defines the further heating element at least to a large extent and which in particular is on a side of the cooking chamber opposite the cooking chamber wall is arranged. In this way, in particular, a small variety of components and / or low storage can be achieved.
a particularly high level of operating convenience can be achieved in particular by an induction furnace with at least one induction furnace device according to the invention.
Ease of use can be further increased in particular by a method for operating an induction furnace device according to the invention with at least one inductively heatable heating element and with at least one inductor, which is provided for inductive heating of the heating element, the inductor being operated in a pulsed manner in a heating mode.
the induction furnace device is not intended to be restricted to the application and embodiment described above.
the induction furnace device can have a number of individual elements, components and units that differs from a number of individual elements, components and units mentioned herein in order to fulfill a mode of operation described herein.
Figure 1 particularly shows an induction furnace 42a.
the induction furnace 42a could be designed as an induction grill and / or as an induction cooker.
the induction oven 42a is designed in particular as an induction baking oven.
the induction furnace 42a has in particular at least one and advantageously precisely one induction furnace device 10a.
the induction oven device 10a could be designed as an induction grill device and / or as an induction stove device.
the induction oven device 10a is designed in particular as an induction oven device.
the induction furnace device 10a has in particular at least one and advantageously exactly one muffle 44a.
the muffle 44a delimits in particular at least one and advantageously exactly one cooking space 46a at least partially.
the muffle 44a delimits the cooking space 46a, in particular together with a cooking device door 48a, at least substantially.
the induction oven device 10a has in particular at least one and advantageously at least the cooking device door 48a.
the induction furnace device 10a has in particular five cooking chamber walls 50a.
the cooking chamber walls 50a are in particular part of the muffle 44a.
One of the cooking space walls 50a is designed in particular as a bottom wall 52a.
One of the cooking space walls 50a is designed in particular as a top wall 54a.
One of the cooking space walls 50a is designed in particular as a rear wall 56a.
Two of the cooking space walls 50a are in particular each designed as a side wall 58a, 60a. In particular, only one of the cooking space walls 50a is described below.
the induction furnace device 10a has in particular at least one and advantageously exactly one operator interface 62a, in particular for entering and / or selecting operating parameters, for example a heating power and / or a heating power density and / or a heating zone.
the operator interface 62a is provided in particular for outputting a value of an operating parameter to an operator.
the induction furnace device 10a has in particular at least one and advantageously exactly one control unit 16a.
the control unit 16a is provided in particular to carry out actions and / or to change settings as a function of operating parameters entered by means of the operator interface 62a.
the control unit 16a regulates an energy supply to at least one inductor 18a, 20a (cf. Figure 2 ).
the induction furnace device 10a has in particular at least one and advantageously exactly one, in particular at least the and advantageously exactly the inductor 18a.
the inductor 18a is arranged outside of the cooking space 46a. In an installed position, the inductor 18a is arranged in particular above the top wall 54a and in particular in a vicinity of the top wall 54a. In particular, the inductor 18a is provided for providing top heat. In an operating state in which the control unit 16a operates the inductor 18a, the inductor 18a in particular provides top heat.
the induction furnace device 10a has in particular at least one and advantageously exactly one further inductor 20a.
the further inductor 20a is arranged outside of the cooking space 46a.
the further inductor 20a is arranged in an installation position, in particular below the bottom wall 52a and in particular in a vicinity of the bottom wall 52a.
the further inductor 20a is provided for providing lower heat.
the control unit 16a operates the further inductor 20a
the further inductor 20a provides, in particular, lower heat.
the induction furnace device 10a could in particular have a different number of inductors 18a, 20a.
the induction furnace device 10a could have exactly one, in particular a single, inductor 18a, 20a.
the induction furnace device 10a could, for example, have at least three, in particular at least four, advantageously at least five and preferably several inductors 18a, 20a.
the induction furnace device 10a has in particular at least one and advantageously precisely one inductively heatable heating element 12a (cf. Figures 1 and 2 ).
the inductor 18a is assigned to the heating element 12a.
the control unit 16a operates the inductor 18a
the inductor 18a heats the heating element 12a inductively.
the inductor 18a is provided for inductive heating of the heating element 12a.
the heating element 12a is arranged in particular in the vicinity of the inductor 18a.
the heating element 12a is designed as a partial area of the top wall 54a.
the top wall 54a defines the heating element 12a in particular at least to a large extent.
the induction furnace device 10a has in particular at least one and advantageously exactly one inductively heatable further heating element 14a (cf. Figures 1 and 2 ).
the further inductor 20a is assigned to the further heating element 14a.
the control unit 16a operates the further inductor 20a
the further inductor 20a inductively heats the further heating element 14a.
the further inductor 20a is provided for inductive heating of the further heating element 14a.
the further heating element 14a is arranged in particular in the vicinity of the further inductor 20a.
the further heating element 14a is designed as a partial area of the bottom wall 52a.
the bottom wall 52a defines the further heating element 14a in particular at least to a large extent.
control unit 16a uses an operator input by means of operator interface 62a to enter a setpoint temperature to which control unit 16a, in particular, is intended to heat the cooking chamber 16a.
the control unit 16a recognizes in particular the setpoint temperature as a reference heating parameter.
the control unit 16a starts a heating-up operating state as a function of the operator input, in which the control unit 16a heats the cooking space 46a by operating the inductor 18a and / or the further inductor 20a.
Figure 3 shows a diagram in which a total output power is plotted over time. On an ordinate 64a of the Figure 3 a total output power is plotted. On an abscissa 66a of the Figure 3 is plotted a time. An average output power of the inductors 18a, 20a is shown in FIG Figure 3 denoted as ⁇ P T.
Figure 4 shows a diagram in which an output power of the inductor 18a is plotted over time. On an ordinate 68a of the Figure 4 an output power of the inductor 18a is plotted. On an abscissa 70a of the Figure 4 is plotted a time. An average output of the inductor 18a is shown in FIG Figure 4 referred to as ⁇ P T1 .
Figure 5 shows a diagram in which an output power of the further inductor 20a is plotted over time. On an ordinate 72a of the Figure 5 an output power of the further inductor 20a is plotted. On an abscissa 74a of the Figure 5 is plotted a time. An average output power of the further inductor 20a is shown in FIG Figure 5 referred to as ⁇ P T2 .
the control unit 16a operates the inductor 18a, in particular in a pulsed manner (cf. Figures 3 to 5 ).
the control unit 16a operates the inductor 18a in the heating-up operating state cyclically with at least one cycle duration 22a.
the control unit 16a operates the inductor 18a in the heating-up operating state in a time sub-interval 24a of the cycle duration 22a.
the control unit 16a deactivates the inductor 18a.
the control unit 16a operates the further inductor 20a, in particular in a pulsed manner.
the control unit 16a operates the further inductor 20a in the heating-up operating state cyclically with at least one cycle duration 22a.
the control unit 16a deactivates the further inductor 20a in the heating operating state in the time sub-interval 24a of the cycle duration 22a.
the control unit 16a operates the further inductor 20a.
the control unit 16a operates the inductor 18a and the further inductor 20a in the heating operating state without overlapping. In particular, in the heating-up operating state, the control unit 16a operates the inductor and the further inductor in alternating pulses.
control unit 16a selects a value of at least 10 ms for the time sub-interval 24a in which the control unit 16a operates in particular the inductor 18a. In particular, the control unit 16a selects a value of a maximum of 150 s for the time sub-interval 24a in which the control unit 16a operates in particular the inductor 18a.
control unit 16a selects a value of at least 10 ms for the further time sub-interval 26a in which the control unit 16a operates in particular the further inductor 20a. In particular, the control unit 16a selects a value of a maximum of 150 s for the further time sub-interval 26a in which the control unit 16a operates in particular the further inductor 20a.
the induction furnace device 10a has in particular at least one and advantageously exactly one supply unit 38a (cf. Figure 2 ).
the supply unit 38a provides high-frequency alternating current in an operating state, for example in the heating-up operating state.
the supply unit 38a has at least one and advantageously exactly one heating frequency unit 76a, which is provided in particular to provide high-frequency alternating current.
the heating frequency unit 76a is assigned in particular to the inductor 18a.
the supply unit 38a has at least one and advantageously exactly one further heating frequency unit 78a, which is provided in particular to provide high-frequency alternating current.
the further heating frequency unit 78a is assigned in particular to the inductor 18a.
the induction furnace device 10a has in particular at least one and advantageously exactly one switching unit 40a.
the switching unit 40a is in particular electrically arranged and / or connected between the supply unit 38a and the inductor 18a and / or the further inductor 20a.
the switching unit 40a has at least one and advantageously exactly one switching element 80a, which is designed in particular as a changeover switch.
the switching element 80a is assigned in particular to the heating frequency unit 76a.
an electrical input connection of the switching element 80a is electrically conductively connected to the heating frequency unit 76a.
a first electrical output connection of the switching element 80a is in particular connected in an electrically conductive manner to the inductor 18a.
a second electrical output connector of the Switching element 80a is connected in an electrically conductive manner in particular to further inductor 20a.
the switching element 80a has at least one and advantageously exactly one switch 82a which, in particular as a function of activation by the control unit 16a, electrically conducts the input connection of the switching element 80a either with the first output connection of the switching element 80a or with the second output connection of the switching element 80a connects.
the switching unit 40a has at least one and advantageously exactly one further switching element 84a, which is designed in particular as a changeover switch.
the further switching element 84a is assigned in particular to the further heating frequency unit 78a.
an electrical input connection of the further switching element 84a is connected in an electrically conductive manner to the further heating frequency unit 78a.
a first electrical output connection of the further switching element 84a is in particular connected in an electrically conductive manner to the inductor 18a.
a second electrical output connection of the further switching element 84a is in particular connected in an electrically conductive manner to the further inductor 20a.
the further switching element 84a has at least one and advantageously exactly one switch 86a, which, in particular as a function of activation by the control unit 16a, connects the input connection of the further switching element 84a either to the first output connection of the further switching element 84a or to the second output connection Switching element 84a connects electrically conductive.
control unit 16a In the heating-up operating state, the control unit 16a optionally connects the inductor 18a or the further inductor 20a to the supply unit 38a in an electrically conductive manner by means of the switching unit 40a. In the heating mode, the control unit 16a, in particular by means of the switching unit 40a, in particular in the time sub-interval 24a, connects the inductor 18a to the supply unit 38a, in particular to the heating frequency unit 76a and to the further heating frequency unit 78a.
control unit 16a operates the inductor 18a, in particular with a heating power of at least 1.5 kW.
the control unit 16a operates the inductor 18a in the heating-up operating state with the heating frequency unit 76a and with the further heating frequency unit 78a.
control unit 16a in particular by means of the switching unit 40a, connects the further inductor 20a to the supply unit 38a, in particular to the heating frequency unit 76a and to the further heating frequency unit 78a, in the further time sub-interval 26a.
the control unit 16a operates the further inductor 20a, in particular with a heating power of at least 1.5 kW.
control unit 16a operates the further inductor 20a in the heating-up operating state with the heating frequency unit 76a and with the further heating frequency unit 78a.
the control unit 16a switches the switching unit 40a, in particular in a currentless state. In particular, the control unit 16a interrupts a provision of energy by the supply unit 38a in the heating-up operating state. In the heating-up mode, the control unit 16a switches the switching unit 40a, in particular exclusively, in particular in a switching time interval 28a, which the control unit 16a executes in particular directly following the time sub-interval 24a and / or the further time sub-interval 26a.
the control unit 16a first executes the time sub-interval 24a in the cycle duration 22a. In particular after the time sub-interval 24a, the control unit 16a executes, in particular, the switching time interval 28a in the heating operating state in the cycle duration 22a. In particular after the switching time interval 28a, the control unit 16a in the heating-up operating state executes, in particular, the further time sub-interval 26a in the cycle duration 22a. In particular after the further time sub-interval 26a, the control unit 16a in the heating-up operating state executes, in particular, the switching time interval 28a in the cycle duration 22a. The control unit 16a then executes, in particular, a second cycle with a cycle duration 22a.
the control unit 16a determines the cycle duration 22a as a function of at least one current heating parameter in relation to the reference heating parameter. In particular, in the heating-up operating state, the control unit 16a determines the cycle duration 22a as a function of a difference between the reference heating parameter and the current heating parameter.
the reference heating parameter has a setpoint temperature, in particular of the cooking chamber 46a, and is designed in particular as a setpoint temperature.
the reference heating parameter is specified in particular by an operator, in particular by an operator input, advantageously by means of the operator interface 62a.
the current heating parameter has, in particular, a, in particular current, temperature, in particular of the cooking space 46a, and is designed in particular as a, in particular current, temperature, in particular of the cooking space 46a.
control unit 16a selects, in particular, a value of at least 30 ms for the cycle duration 22a. In particular, the control unit 16a selects a value of a maximum of 300 s for the cycle duration 22a in the heating-up operating state. Reference is made below to the Figures 6 to 11 .
Figure 6 shows a diagram in which a temperature of the heating element 12a is plotted over time. On an ordinate 88a of the Figure 6 a temperature of the heating element 12a is plotted in units of degrees Celsius. On an abscissa 90a of the Figure 6 a time is plotted in units of seconds.
Figure 7 shows a diagram in which a current heating parameter, which in particular has a current temperature of the cooking chamber 46a, is plotted over time.
a current heating parameter which in particular has a current temperature of the cooking chamber 46a
a time is plotted in units of seconds.
Figure 8 shows a diagram in which a temperature of the further heating element 14a is plotted over time. On an ordinate 96a of the Figure 8 a temperature of the further heating element 14a is plotted in a unit of degrees Celcius. On an abscissa 98a of the Figure 8 a time is plotted in units of seconds.
Figure 9 shows a diagram in which an average power of the inductor 18a is plotted over time. On an ordinate 100a of the Figure 9 is a Average power of the inductor 18a plotted in a unit of watts. On an abscissa 102a of the Figure 9 a time is plotted in units of seconds.
Figure 10 shows a diagram in which a cycle duration T c is plotted over time. On an ordinate 104a of the Figure 10 a cycle duration T c is plotted in one unit of seconds. On an abscissa 106a of the Figure 10 a time is plotted in units of seconds.
Figure 11 shows a diagram in which an average power of the further inductor 20a is plotted over time. On an ordinate 108a of the Figure 11 an average power of the further inductor 20a is plotted in a unit of watts. On an abscissa 110a of the Figure 11 a time is plotted in units of seconds.
each cycle duration 22a in particular in at least one time interval 30a, 32a, 34a, 36a of the heating operating state, in particular in each time interval 30a, 32a, 34a, 36a of the heating operating state, has a value of at least 10 ms.
the first cycle duration 22a1 in the time interval 30a of the heating-up operating state has, in particular, a value of at least substantially 59.2 s.
a second cycle duration 22a2 in a second time interval 30a of the heating-up operating state has, in particular, a value of at least substantially 45.2 s.
a third cycle duration 22a3 has, in particular, a value of at least essentially 29 s.
a fourth cycle duration 22a4 in a fourth time interval 36a of the heating-up operating state has, in particular, a value of at least substantially 14.9 s.
a value of the cycle duration 22a is reduced as a function of time.
the control unit 16a operates the inductor 18a with a cycle duration 22a that is shorter, the smaller the difference between the reference heating parameter and the current heating parameter.
the control unit 16a operates the further inductor 20a in the heating-up operating state with an even more The smaller the cycle duration 22a, the smaller the difference between the reference heating parameter and the current heating parameter.
the inductor 18a and the further inductor 20a are operated in a pulsed manner in the heating operating state.
the inductor 18a and the further inductor 20a are operated in the heating operating state cyclically with at least one cycle duration 22a in a pulsed manner.
the inductor 18a and the further inductor 20a are operated in the heating-up operating state, in particular with a cycle duration 22a that is shorter, the smaller the difference between the reference heating parameter and the current heating parameter.
the occurrence of flicker is avoided in the method, in particular by means of a value of the cycle duration 22a which is selected as large as possible while maintaining the reference heating parameter.
a limit value for compliance with a flicker standard is particularly dependent on a line variation and / or on a duration of fluctuation and / or on a form factor.
the control unit 16a operates the inductor 18a in particular with a heating power which the control unit 16a determines in particular as a function of the reference heating parameter and which in particular corresponds at least essentially to a sum of an upper heating power P 1 and a lower heating power P 2 .
the control unit 16a operates the further inductor 20a, in particular with a heating power which the control unit 16a determines in particular as a function of the reference heating parameter and which in particular corresponds at least essentially to a sum of an upper heating power P 1 and a lower heating power P 2 .
the upper heating output P 1 is an average heating output of the inductor 18a averaged over the cycle duration 22a, which is necessary to achieve the setpoint temperature.
the lower heating power P 2 is an average heating power of the further inductor 20a averaged over the cycle duration 22a, which is necessary to achieve the setpoint temperature.
the switching time interval 28a advantageously because of the switching time intervals 28a, there are fluctuations in an output power in the heating-up operating state, which in particular could result in flicker.
the occurrence of flicker is more likely and / or an effect when flicker occurs, the greater the shorter the cycle duration 22a.
the shorter the cycle duration 22a the fewer thermal fluctuations exist in a temperature of a heating element 12a, 14a heated by an inductor 18a, 20a, which is particularly advantageous from a thermal point of view.
the occurrence of flicker is less likely and / or an effect when flicker occurs, the greater the cycle duration 22a.
the longer the cycle duration 22a the greater the thermal fluctuations in a temperature of a heating element 12a, 14a heated by an inductor 18a, 20a, which means that pulsed heating, in particular for an operator, is recognizable, which in particular results in a negative cooking experience for the operator results.
control unit 16a selects the cycle duration 22a in the operating state as a compromise between thermal fluctuations and low flicker.
the control unit 16a selects the cycle duration 22a to be just large enough that flicker can be kept within the flicker norm and that thermal fluctuations are as invisible to an operator as possible and / or do not influence a cooking result.
the invention is based in particular on the knowledge that a variation of the cycle duration 22a in a range from 30 ms to 300 s, in particular from 1 s to 200 s, advantageously from 1.5 s to 100 s and particularly advantageously from 2 s to 60 s Cooking chamber temperature, and in particular a heating time, is hardly and / or insignificantly influenced, in particular although considerable thermal noise can be seen in a heating element 12a, 14a to be heated, which is in particular greater, the greater the cycle duration 22a.
thermal fluctuations in a heating element 12a, 14a to be heated vary as a function of the selected cycle duration 22a.
higher thermal fluctuations are allowed at a low cooking space temperature, which in particular has a large distance from the setpoint temperature, so that a value of the cycle duration 22a can be selected to be greater.
a high cooking space temperature which is in particular a short distance from the setpoint temperature, smaller thermal fluctuations are allowed, so that a value of the cycle duration 22a should be selected to be smaller.
the control unit 16a could, for example, reduce a heating power to maintain the cooking space temperature, in particular to a maximum heating power of 1.8 kW, whereby the control unit 16a Inductor 18a and / or the further inductor 20a, in particular each, could operate with a single heating frequency unit 76a, 78a. In this way, in particular, exceeding the setpoint temperature due to thermal fluctuations can be easily avoided.

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Physics & Mathematics (AREA)
Electromagnetism (AREA)
General Induction Heating (AREA)

EP20172309.5A 2019-05-10 2020-04-30 Dispositif de four à induction Active EP3737210B1 (fr)

Applications Claiming Priority (1)

Application Number	Priority Date	Filing Date	Title
EP19382369		2019-05-10

Publications (2)

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EP3737210A1 true EP3737210A1 (fr)	2020-11-11
EP3737210B1 EP3737210B1 (fr)	2022-08-31

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EP20172309.5A Active EP3737210B1 (fr)	2019-05-10	2020-04-30	Dispositif de four à induction

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EP (1)	EP3737210B1 (fr)
ES (1)	ES2927388T3 (fr)
PL (1)	PL3737210T3 (fr)

Citations (6)

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Publication number	Priority date	Publication date	Assignee	Title
JPH0330281A (ja) *	1989-06-28	1991-02-08	Matsushita Electric Ind Co Ltd	誘導加熱調理器
WO2004071132A1 (fr) *	2003-02-05	2004-08-19	Abb Patent Gmbh	Procede et systeme d'un four a induction ou d'un inducteur
CN102654290B (zh) *	2011-03-01	2014-08-13	台达电子工业股份有限公司	多炉电磁炉装置及其操作方法
CN106813269A (zh) *	2015-11-27	2017-06-09	佛山市顺德区美的电热电器制造有限公司	一种电磁加热设备
EP3312511A1 (fr) *	2015-11-27	2018-04-25	Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Limited	Dispositif de chauffage électromagnétique
WO2018116058A1 (fr) *	2016-12-23	2018-06-28	BSH Hausgeräte GmbH	Dispositif pour appareil de cuisson

2020
- 2020-04-30 ES ES20172309T patent/ES2927388T3/es active Active
- 2020-04-30 EP EP20172309.5A patent/EP3737210B1/fr active Active
- 2020-04-30 PL PL20172309.5T patent/PL3737210T3/pl unknown

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number	Priority date	Publication date	Assignee	Title
JPH0330281A (ja) *	1989-06-28	1991-02-08	Matsushita Electric Ind Co Ltd	誘導加熱調理器
WO2004071132A1 (fr) *	2003-02-05	2004-08-19	Abb Patent Gmbh	Procede et systeme d'un four a induction ou d'un inducteur
CN102654290B (zh) *	2011-03-01	2014-08-13	台达电子工业股份有限公司	多炉电磁炉装置及其操作方法
CN106813269A (zh) *	2015-11-27	2017-06-09	佛山市顺德区美的电热电器制造有限公司	一种电磁加热设备
EP3312511A1 (fr) *	2015-11-27	2018-04-25	Foshan Shunde Midea Electrical Heating Appliances Manufacturing Co., Limited	Dispositif de chauffage électromagnétique
WO2018116058A1 (fr) *	2016-12-23	2018-06-28	BSH Hausgeräte GmbH	Dispositif pour appareil de cuisson

Also Published As

Publication number	Publication date
PL3737210T3 (pl)	2022-12-05
EP3737210B1 (fr)	2022-08-31
ES2927388T3 (es)	2022-11-04

Publication	Publication Date	Title
EP2342943B1 (fr)	2015-09-16	Plaque de cuisson et procédé permettant de faire fonctionner une plaque de cuisson
DE2917007C2 (de)	1983-01-13	Hochfrequenzofen
WO2018116056A1 (fr)	2018-06-28	Dispositif pour appareil de cuisson
EP3560276B1 (fr)	2021-10-27	Dispositif formant appareil de cuisson
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EP4335249A1 (fr)	2024-03-13	Système de transmission d'énergie par induction
DE10050800A1 (de)	2001-10-04	Halogenheizaggregatsteuervorrichtung eines Mikrowellenherdes und Verfahren dazu
EP3560281B1 (fr)	2021-03-03	Dispositif pour appareil de cuisson
WO2016071803A1 (fr)	2016-05-12	Dispositif pour appareil de cuisson
EP3737210B1 (fr)	2022-08-31	Dispositif de four à induction
EP3641497B1 (fr)	2023-08-02	Dispositif formant appareil de cuisson
EP3082378B1 (fr)	2020-05-06	Plaque de cuisson
EP3383139B1 (fr)	2025-08-06	Dispositif d'appareil de cuisson
DE102015115325A1 (de)	2017-03-16	Dunstabzugsvorrichtung und Dunstabzugssystem sowie Verfahren zum Betreiben
EP3664578B1 (fr)	2024-06-12	Dispositif formant appareil de cuisson
EP3565379B1 (fr)	2022-04-06	Dispositif d'induction
EP3484242B1 (fr)	2021-07-21	Dispositif formant appareil de cuisson inductif
EP2945461B1 (fr)	2017-05-10	Dispositif d'appareil de cuisson
BE1031485B1 (de)	2024-11-04	Verfahren zum Betreiben eines Heizmittels eines Gargeräts
DE102023210853A1 (de)	2024-05-16	Gargerätevorrichtung, Gargerät und Verfahren zum Betrieb einer Gargerätevorrichtung
EP3788843B1 (fr)	2024-06-05	Système de transfert d'énergie par induction
WO2025261966A1 (fr)	2025-12-26	Système de transmission d'énergie par induction et procédé de fonctionnement d'un système de transmission d'énergie par induction
EP4576933A1 (fr)	2025-06-25	Dispositif de table de cuisson à induction, table de cuisson à induction et procédé de fonctionnement d'un dispositif de table de cuisson à induction
DE102017203067A1 (de)	2017-09-21	Gargerätevorrichtung
WO2024046640A1 (fr)	2024-03-07	Système de transmission d'énergie par induction

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