DE102019219622A1 - Oven device - Google Patents

Abstract

The invention relates to a cooking device (10), in particular an induction cooking device, with a control unit (12) which, in a periodic continuous heating operating state, for repetitive activation and energy supply of at least one heating unit (14) and at least one further heating unit (16) with an operating period (18) is provided with at least a first time interval (20) and at least a second time interval (22). In order to improve properties with regard to performance control, it is proposed that the control unit (12) be provided between the first time interval (20) and insert at least one transition time interval (24) into the second time interval (22) in order to control at least one flicker parameter.

Description

The invention relates to a cooking device according to the preamble of claim 1 and a method for operating a cooking device according to the preamble of claim 15.

Cooking ovens are already known from the prior art which can be heated by inductive heating elements and which have a circulating air fan. The heating elements and the circulating air fan are controlled in compliance with a flicker standard, with a control unit controlling fluctuations in an overall output power by keeping it within narrow limit values or restricting a length of an operating period.

The object of the invention is in particular to provide a generic device with improved properties with regard to performance control. The object is achieved by the features of claims 1 and 15, while advantageous refinements and developments of the invention can be found in the subclaims.

The invention is based on a cooking device, in particular an induction cooking device, with a control unit which, in a periodic continuous heating operating state, for repetitive activation and energy supply of at least one heating unit and at least one further heating unit which is in particular different from the heating unit and has an operating period with at least a first time interval and at least a second time interval is provided.

It is proposed that the control unit be provided to insert at least one transition time interval between the first time interval and the second time interval in order to control at least one flicker parameter.

By means of an embodiment according to the invention, a generic oven device with improved properties with regard to a particularly simplified power control and / or in particular with regard to low-noise operation can be provided. A simplified power control can in particular significantly reduce the effort to avoid exceeding a maximum electric current per electric phase. In this way, in particular inexpensive and / or less powerful components can be used. The effort to control a desired heating output desired by an operator can advantageously be reduced with a number of heating units. Flicker can preferably be according to a flicker standard, in particular according to the DIN EN 61000-3-3 standard at least largely avoided by advantageous control of individual heating units. In particular, a reliable configuration can preferably be achieved in relation to a target heating output requested by the operator. In particular, several heating units can advantageously be operated simultaneously with little noise and with a flicker-controlled load on a supply network. In particular, operational safety can advantageously be increased. In addition, flicker in particular can be advantageously reduced, in particular since jumps in the total output power can be reduced and / or avoided entirely. Furthermore, a total output power difference, in particular between two time intervals in which the heating unit and the further heating unit have a constant total output power, can be increased, in particular taking into account the flicker standard, so that a thermal response time can advantageously be improved. In this context, a “total output power difference” is to be understood in particular as a difference in a total output power between at least two, preferably exactly two, time intervals. In addition, the cooking oven device can advantageously be adapted to various requirements, as a result of which in particular a particularly uniform power output is achieved and a selected target power can advantageously be provided as precisely as possible. Customer satisfaction can advantageously be increased and / or ensured.

A “cooking oven device”, advantageously an “induction cooking device”, is to be understood to mean in particular at least a part, in particular a subassembly, of a cooking device, advantageously a cooking oven and in particular a baking oven, for example an induction baking oven, and / or a steam cooking device.

A “control unit” is to be understood in particular to mean an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of a cooking device, in particular an induction cooking device, and which is provided in particular for at least one inverter unit of the cooking device with at least one inverter , in particular a resonance inverter and / or a dual half-bridge inverter, to control and / or regulate. In particular, the control unit evaluates a signal provided by a unit, in particular a sensor and / or detection unit, according to which the control unit can initiate a special process and / or operating state, in particular if at least one condition is met. The control unit preferably comprises a computing unit and in particular in addition to Computing unit is a storage unit with a control and / or regulating program stored therein, which is intended to be executed by the computing unit. The phrase that the control unit is intended to “operate” at least one of the heating units is to be understood in particular to mean that the at least one heating unit has a finite output power which is in particular different from zero.

A “continuous heating operating state” is to be understood in particular to mean an operating state in which a unit, in particular at least two heating units, is activated and / or the unit, in particular the heating unit, is operated by means of a special method and / or a special algorithm, the control unit in particular operates the heating units in a coordinated manner. In particular, the continuous heating operating state starts at least 100 ms, advantageously at least 500 ms, preferably at least 1 s and particularly preferably at least 5 s after starting the cooking device and / or selecting a heating output and / or selecting an operating and / or cooking program, advantageously by means of a Operator. In particular, the continuous heating operating state lasts, in particular without interruption in time, at least 1 s, preferably at least 10 s, advantageously at least 60 s and particularly preferably at least 300 s, electrical energy being provided in particular to at least one heating unit, the heating unit converting the electrical energy provided into an output heating output , which is advantageously not equal to 0 and corresponds in particular to a target heating output over a time average. In particular, in the continuous heating operating state, there is an increase in temperature of a receiving space of the induction oven and in particular of a cooking utensil arranged in the receiving space and / or a temperature increase and / or an at least partial phase transition of a cooking item located in the cooking utensil. In particular, the temperature increase of the cookware and / or the food to be cooked is in particular at least 1 ° C., advantageously at least 10 ° C., preferably at least 50 ° C. and particularly advantageously more than 100 ° C. In particular, a mass fraction of the food which undergoes a phase transition is at least 1%, advantageously at least 5%, preferably at least 10% and particularly advantageously at least 20%. In particular, the continuous heating operating state is different from a starting operating state, in particular a detection of a cookware and / or a setting of an output power of the heating units. In this case, the continuous heating operating state preferably connects directly to the starting operating state. In particular, an output power of the heating units in the continuous heating operating state, averaged over the operating period, corresponds at least essentially to a target power desired by the control unit and preferably predetermined by an operator and / or a cooking program. In this context, the phrase that the averaged output power “at least essentially” corresponds to a target power sought by the control unit should in particular be understood to mean that the two power values differ from one another by a maximum of 5%, preferably a maximum of 3% and particularly preferably a maximum of 1% .

In particular, the continuous heating operating state is different from a frequency sweep operating state in which the control unit determines at least one dependency of an output power on a heating frequency, preferably for each inductive heating unit in particular. In particular, the continuous heating mode follows the frequency sweep mode. Advantageously, the control unit always ends the frequency sweep operating state before the permanent heating operating state and initiates the permanent heating operating state always after the frequency sweep operating state.

An “output power” of a heating unit is to be understood in particular as an electrical power which the control unit of the heating unit, in particular the heating element, provides in at least one continuous heating operating state for the purpose of heating and / or increasing the temperature of at least one cookware. For example, the output power could be characterized by at least one electrical current. In at least one continuous heating operating state, the heating unit and in particular the heating element could, for example, convert the output power in at least one line element of the heating element at least partially, advantageously at least to a large extent and preferably completely into a heat flow and provide the heat flow in particular for heating at least one cookware. Alternatively or additionally, the heating unit could provide, in particular in at least one continuous heating operating state, in particular by means of the electric current, an in particular high-frequency alternating electromagnetic field, which could be converted into heat in particular in a cookware and / or a heat-generating element of the heating unit.

Furthermore, “total output power”, in particular a total output power, in particular a sum of the output powers of the at least two inverters, in particular all inverters, is to be understood in particular at any time, in particular in the at least one time window.

A “heating unit” is to be understood here in particular to mean a unit with at least one heating element or with a group of heating elements which, in at least one operating state and in particular in the continuous heating operating state, together with electrical energy for generating a desired heating output for the purpose of heating the cookware and / or the items to be cooked in the cookware can be supplied, one or more heating units being able to heat a cookware together. The oven device can in particular have a plurality of heating units and / or a plurality of further heating units. The heating units can provide different heating outputs in terms of time and in particular in comparison with one another at a point in time in at least one operating state and in particular in the continuous heating operating state. In particular, an individual heating unit and / or an individual heating element can deliver a different heating output over time during at least one operating state and in particular during the continuous heating operating state. A “heating element” is to be understood here to mean in particular an element which, in at least one operating state and in particular in the continuous heating operating state, is intended to supply energy to at least one cookware for the purpose of heating the cookware. For example, the heating element could be designed as a resistance heating element and in particular be provided to convert energy into heat and to supply it to the cookware for the purpose of heating the cookware. Alternatively or additionally, the heating element can be designed as an induction heating element, in particular as an inductor, which in particular has at least one induction coil, and in particular can be provided for supplying energy to the cookware in the form of an alternating electromagnetic field with a heating frequency, the energy supplied to the cookware particularly in Cooking dishes can be converted into heat.

“Repetitive activation” of a unit is to be understood here to mean, in particular, activation of the unit that repeats itself periodically in at least one continuous heating operating state, in particular with an electrical signal.

An “operating period” is to be understood in particular as a period of time during which a heating unit is operated in a continuous heating operating state. In particular, the heating unit is activated during the operating period, electrical energy being able to be supplied to the heating unit and in particular at least one heating element of the heating unit, it being possible for the electrical energy to be negligible. The operating period is preferably divided into at least two time intervals during which the heating unit in particular is supplied with a respective electrical energy. In particular, individual time intervals can have a different duration from one another. The operating period has in particular a time period between 100 ms and 5 s, preferably between 500 ms and 3 s and particularly preferably between 1 s and 2 s. A minimum duration of the operating period can be specified in particular by a flicker standard, with the flicker standard in particular being violated below this minimum duration. Furthermore, a maximum duration of the operating period can be determined in particular by a thermal inertia of the cookware. The control unit is preferably provided for repeating the operating period periodically. The control unit is preferably provided to subdivide the operating period into the at least two and preferably at least three time intervals in such a way that successive, preferably all, time intervals differ in at least one operating parameter. In this context, “successive time intervals” are to be understood in particular to mean at least two time intervals, in particular the at least two time intervals of the operating period, which in particular directly adjoin one another. In this context, the phrase “directly adjoining one another” is to be understood in particular to mean that two operating periods and / or time intervals, in particular at least in terms of time, lie immediately after one another and in particular have at least one common time.

In particular, in the event of a change in an output power of a heating unit between the successive time intervals, the course of the change can be delayed, in particular due to non-linear effects, in particular in the case of a coupling between electronic components, and consequently to a reduced edge steepness, in which an increase and / or fall time is not equal to 0. In particular, this can result in an addition of output powers in a transition area between the successive time intervals, which, as power peaks, can lead to the total output power being exceeded via a limit value for an electrical phase. In particular, in the total output power, in particular due to non-linear effects, in particular in the case of a coupling between electronic components and consequently a reduced edge steepness in which a rise and / or fall time is not equal to 0, a drop in power can occur in the transition area between the successive time intervals , which can lead to the appearance of flicker. In this context, a “transition area” is to be understood in particular to mean a temporal area which lies between the successive ones Time intervals exist which have an end of a preceding time interval of the successive time intervals and a beginning of a subsequent time interval of the successive time intervals and in particular occupy a maximum of 5%, preferably 10% of each time interval of the successive time intervals.

The operating parameter can be, in particular, a heating frequency, a duty cycle and / or a phase, in particular the at least one control signal, and / or an output power, in particular at least one heating unit, and / or a time period, in particular at least one time interval. A “duty cycle” is to be understood in particular as a ratio of a time period in which a signal, preferably a periodic signal, assumes a switch-on value, in particular a high level, to a defined time range of the signal, preferably a period of the signal. A “phase” of a, preferably periodic, signal is to be understood in particular as a phase angle of the signal. In particular, the phase of the at least one control signal defines a switching point in time of at least one inverter of at least one of the heating units. By shifting and / or changing the phase of the at least one control signal, the switching time of the inverters of the heating units can accordingly be shifted relative to one another.

Furthermore, a “transition time interval” is to be understood in particular as a time period of the operating period which deviates from a time interval, in particular from the first and the second time interval with an at least substantially constant total output power and in which in particular the total output power and / or the output power at least one the heating units in particular smooth, continuous, in particular monotonous, advantageously strictly monotonous, increasing or monotonous, advantageously strictly monotonous, falling. In particular, a transition time interval has a finite time duration, in particular of at least 1 ms, advantageously at least 10 ms, preferably of at least 50 ms and particularly preferably of at least 100 ms. An “at least essentially” constant total output power is to be understood in particular to mean a total output power which has a relative fluctuation, in particular power fluctuation, of at most 5%, preferably of at most 3% and particularly preferably of at most 1%.

A “flicker parameter” is to be understood in particular as a perceptibility unit Pst which relates flicker to a measurable value in relation to a specific period of time, which can be in particular 10 minutes long. “Flicker” is to be understood in particular as a subjective impression of an instability of a visual perception, which is caused in particular by a light stimulus whose luminance or spectral distribution fluctuates over time. In particular, flicker can be caused by a voltage change in a mains voltage and / or a change in a total output heating power.

In addition, it is proposed that the control unit be provided to keep at least one, advantageously exactly one, of the heating units, in particular the further heating unit, deactivated in the transition time interval. The fact that a unit is “kept deactivated” is to be understood in particular to mean that the unit is disconnected from a particular electrical power supply and / or deactivated by a control unit within a time period, in particular within the transition time interval, the unit being in front of and / or after the time period can be connected to an electrical power supply, in particular, and can in particular be controlled by a control unit.

As a result, the output power can be made available in the form of a heating power and a maximum value of the total output power can advantageously be avoided.

It is further proposed that the control unit be provided to design the second time interval as a combination time interval in which the control unit operates the heating unit and the further heating unit simultaneously. As a result, in particular a variable and, in particular, smart control of the heating unit and / or the further heating unit can be implemented, as a result of which a cooking process can advantageously be influenced. A “combination time interval” is to be understood in particular as a time interval in which the control unit simultaneously activates and / or operates the heating unit and the further heating unit, in particular all heating units, with a respective output power.

Furthermore, it is proposed that the control unit be provided to change at least one form factor of an output power of the heating unit to control the flicker parameter. This can result in improved compliance with at least one flicker standard. A “form factor” of an electrical, in particular periodic, signal, for example an electrical power, an electrical voltage and / or an electrical current, is to be understood in particular as a ratio of the effective value to the rectified value of the signal. In particular, the Form factor dependent on and / or characterized by an envelope of the signal and can in particular assume values from one to infinity. In particular, the form factor establishes a relationship between a relative signal change and a flicker parameter. In particular, the shape factor has a value different from 1 for a signal shape different from a step function. The perceptibility unit Pst advantageously takes a value less than / equal to 1. The perceptibility unit Pst and the form factor are linked to one another by the following relationship, where T _{P is} an observation period, which has a length of time in particular of 10 min, dmax is a maximum relative change in a signal ΔS / S, in particular the output power, and N is a number Signal changes during the observation period T _P is: $$P_{St}=F\cdot d_{\text{Max}}{\left(\frac{2.3\cdot \text{N}}{T_p}\right)}^{1/3.2}$$

In particular, the control unit can keep the perceptibility unit Pst constant by reducing the form factor and at the same time increasing the maximum relative change dmax. This allows flexibility in the provision of services.

In addition, it is proposed that the control unit be provided to change an output power of the heating unit in the transition time interval and to adopt the changed output power in the combination time interval. In this way, in particular an exceeding of a load limit of one of the three electrical phases of a household connection can be avoided, wherein the phases can each act as an energy source for the heating units and further heating units. In particular, the load limit is 3.6 kW. In particular, the control unit reduces the output power of the heating unit. In particular, the control unit reduces the output power of the heating unit from a maximum value to a lower value during the transition time interval. In particular, the control unit reduces the total output power during the transition period from a maximum value of 3.6 kW to a lower value.

Furthermore, it is proposed that the control unit be provided to introduce at least one further transition time interval and to arrange it in time, in particular immediately after the second time interval. In particular, this can result in increased flexibility in controlling the overall performance.

It is also proposed that the control unit be provided to change an output power of the heating unit in the further transition time interval. In this way, in particular a smooth transition between the further transition time interval and a time interval following the further transition time interval or, in the case of an operating period ending with the further transition time interval, with periodic activation of the heating unit and / or the further heating unit with the operating period between the further transition time interval and the time immediately following the first time interval of the operating period. In particular, a temporal length of the transition time interval is linked to a slope of an output power in the transition time interval. In particular, an average value of the output power and an average value of the total output power are below the limit value for an electrical phase. In particular, the control unit increases the output power of the heating unit in the further transition time interval. In particular, the control unit increases the output power of the heating unit to a maximum power for the heating unit in the further transition time interval. In particular, the control unit increases the total output power in the further transition time interval to a maximum value of 3.6 kW.

In particular, the control unit changes the output power and / or the total output power, in particular in the continuous heating operating state, in the transition time interval and / or in the further transition time interval in any manner continuously, in particular at least essentially logarithmically and / or exponentially. The control unit is preferably provided to change the output power and / or the total output power, in particular in the continuous heating operating state, in the transition time interval and / or in the further transition time interval at least essentially linearly in time, in particular linearly increasing and / or decreasing. In particular, the control unit is provided to operate the heating unit and the further heating unit in such a way that the output power and / or the total output power of the heating unit and the further heating unit changes linearly in the transition time interval and / or in the further transition time interval. In particular, the output power and / or the total output power in the transition time interval and / or in the further transition time interval has an at least substantially constant slope and / or first derivative. In this context, the fact that the output power and / or the total output power is “at least essentially” linear in time and / or has an “at least essentially” constant constant slope can be understood in particular that a linear regression curve, in particular the output power and / or the total output power, has a coefficient of determination of at least 0.9, preferably of at least 0.95 and particularly preferably of at least 0.98. In particular, at least one form factor, in particular an analytical flicker form factor, in particular the output power and / or the total output power in the transition time interval and / or in the further transition time interval, has a value between 0 and 1, preferably between 0.2 and 0.8 and particularly preferably between 0.4 and 0.6, a jump point, a peak in power and / or a drop in power and / or a step in particular having a value of 1 and a straight line in particular having a value of 0. In this way, in particular, a calculation of the total output power can be simplified, whereby in particular a selected target power can be provided as precisely as possible. In particular, the control unit is provided for changing the output power and / or the total output power of the heating unit and / or the further heating unit in the transition time interval and / or in the further transition time interval at least one heating frequency and / or at least one duty cycle and / or at least one phase, in particular to change the at least one control signal from the control unit, in particular continuously.

In order to advantageously enable a control scheme that is particularly simple, as a result of which a computational outlay for the control unit can be reduced, it is proposed that the output powers of the heating unit have a symmetrical course in the transition time interval and in the further transition time interval. In particular, temporal lengths of the transition time interval and the further transition time interval are the same. The edge steepness of the output power in the transition time interval and in the further transition time interval is advantageously the same, so that in particular the rise time in the transition time interval and the fall time in the further transition time interval are identical.

It is also proposed that an output power of the heating unit has a variable course in the transition time interval and / or the further transition time interval. The phrase "variable course" is to be understood in particular as a temporal development of an output power and / or a total output power in a time interval and / or a transition time interval, the output power assuming different values at at least two points in time of the time interval and / or a transition time interval, which advantageously differ in particular by at least 1%, advantageously by at least 5% of an average value of the output power in the time interval and / or in the transition time interval. The control unit is preferably provided to change the total output power of the heating unit and in particular the further heating unit smoothly, continuously, monotonically increasing and / or monotonously decreasing in the transition time interval and / or in the further transition time interval. The control unit is preferably provided to change the total output power of the heating unit and in particular of the further heating unit in a strictly monotonous increase and / or decrease in the transition time interval and / or in the further transition time interval. In this way, in particular, an advantageous control of a power supply can be provided, which in particular increases the efficiency of the control of the heating unit and the further heating unit and increases operational reliability.

Furthermore, it is proposed that the course of the output power is constant, in particular during the entire operating period. Furthermore, the phrase "steady" should be understood to mean, in particular, free of jumps. In particular, a flicker standard can thereby be fulfilled in a simple manner.

It is also proposed that the heating units are of different types of heating. The fact that two units are “different heating types” is to be understood in particular to mean that the units each provide cooking utensils and / or items to be cooked and in particular at least partially have different components by means of different, in particular physical, heat generation mechanisms and / or heat distribution mechanisms.

This allows in particular flexible heating of the cookware and / or the food to be cooked. In particular, the heating units each have an independent electrical energy supply. In particular, different cooking modes can be carried out. A flexibility of a building design and in particular an energy efficiency can advantageously be increased.

It is also proposed that the heating unit be designed as an induction heating unit. In particular, the control unit is intended to operate the induction heating units with at least one heating frequency and / or the same heating frequency that differs by at least 15 kHz, preferably at least 16 kHz and particularly preferably at least 17 kHz, in particular in the case of simultaneous operation of a plurality of induction heating units . In particular, the induction heating units can be one from the other have different arrangement and / or design. In particular, the induction heating unit can be provided to heat an inductively heated cookware directly or to convert a high-frequency electromagnetic field into heat radiation in an energy conversion element by eddy current and / or magnetic reversal effects and thereby indirectly heat the cookware and / or the food to be cooked. In particular, the control unit is intended to continuously operate at least one heating unit.

In addition, it is proposed that the further heating unit be designed as a circulating air heating unit and have at least one heating resistance element. This allows, in particular, a particularly controlled distribution of heat, which can advantageously influence a cooking process. A “circulating air heating unit” is to be understood in particular to mean a unit which has at least one air circulation element which, at least in part, generates an in particular circulating air flow within the receiving space of a cooking oven. The circulating air heating unit advantageously has at least one fan for conveying air. In particular, the control unit is provided to operate the further heating unit in sections in one of the time intervals and to deactivate it in particular in the transition time interval and in the further transition time interval. In particular, the control unit is provided to switch on the further heating unit as required, in particular in the continuous heating operating state.

In addition, a cooking oven, in particular an induction cooking oven, advantageously an induction oven, with at least one cooking oven device according to the invention is proposed.

The invention is also based on a method for operating a cooking device, in particular an induction cooking device, in which at least one heating unit and at least one further heating unit, which is in particular different from the heating unit, in a periodic continuous heating operating state with an operating period with at least a first time interval and at least a second time interval be controlled repetitively and supplied with electrical energy.

It is proposed that between the first time interval and the second time interval at least one transition time interval for checking at least one flicker parameter is inserted.

By means of the configuration according to the invention, a generic oven device with improved properties with regard to a particularly simplified power control and / or in particular with regard to low-noise operation can be provided.

The cooking device device should not be limited to the application and embodiment described above. In particular, the cooking appliance device can have a number that differs from a number of individual elements, components and units specified here in order to fulfill a function described here.

Further advantages result from the following description of the drawing. In the drawing, an embodiment of the invention is shown. 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 useful further combinations.

• 1 einen Garofen mit einer Garofenvorrichtung,
• 2 eine beispielhafte Darstellung eines Ansteuerungsschemas für eine Heizeinheit der Garofenvorrichtung und eine weitere Heizeinheit der Garofenvorrichtung und
• 3 ein Verfahrensdiagramm eines erfindungsgemäßen Verfahrens zum Betrieb der Garofenvorrichtung.

Show it:

• 1 a cooking oven with a cooking device,
• 2nd an exemplary representation of a control scheme for a heating unit of the oven device and a further heating unit of the oven device and
• 3rd a process diagram of a method according to the invention for operating the oven device.

1 shows a cooking oven 38 , which is used as an induction oven 40 is trained. The oven 38 has a cooking device 10th on. The oven 38 has a recording room 42 on. The recording room 42 is intended to hold cookware and / or food. In a continuous heating operating state, the receiving space has 42 a temperature above a room temperature of 20 °.

The oven device 10th has a control panel 52 on. The control panel 52 has a variety of rotary switches 56 for an input and / or selection of operating parameters, for example a target heating output and / or a cooking time, by an operator. The control panel 52 has a display 54 on. the display 54 is provided for an optical and / or acoustic output of at least one value of at least one operating parameter to the operator.

The oven device 10th has a heating unit 14 on. The heating unit 14 has an upper heating unit 60 on. The heating unit 14 has a sub-heating unit 62 on. The upper heating unit 60 is on an upper wall 44 of the recording room 42 arranged. The sub-heater 62 is on a lower wall 46 of the recording room 42 arranged.

The oven device 10th has another heating unit 16 on. The further heating unit 16 is on a rear wall 48 of the recording room 42 arranged. The heating units 14 and the further heating unit 16 are different types of heating. The heating unit 14 is as an induction heating unit 32 educated. The upper heating unit 60 and the sub-heater 62 are each as an induction heating unit 32 educated. The upper heating unit 60 takes over an oven heat function. The sub-heater 62 takes over an oven sub-heat function.

The further heating unit 16 is as a forced air heating unit 34 educated. The further heating unit 16 has a heating resistor element 36 on. The heating resistor element 36 converts electrical power into thermal radiation. The further heating unit 16 has a fan 50 on. The ventilator 50 is for circulating the air within the recording room 42 intended.

The oven device 10th has a control unit 12 on. The control unit 12 It is intended to perform actions and / or algorithms and / or to change settings depending on operating parameters entered by an operator, such as a target heating output and / or a cooking time. The control unit 12 is in a periodic continuous heating mode for repetitive activation and energy supply of the heating unit 14 and the further heating unit 16 intended.

The control unit 12 operates the heating unit in the continuous heating mode 14 and the further heating unit 16 with an operating period 18th . The operating period 18th is divided into several time periods. The operating period 18th has a first time interval 20th on. The operating period 18th has a second time interval 22 on (cf. 2nd ).

The operating period 18th has a transition time interval 24th on. The operating period 18th has another transition time interval 30th on.

2nd shows an exemplary representation of a control scheme 58 for the heating unit 14 and the further heating unit 16 . On an abscissa axis 64 is a time and on an ordinate axis 66 one output power each P _IPM 28 the heating unit 14 and an output power P _RHA 28 the further heating unit 16 as well as a total output power P _mains 68 applied.

A power curve shows a time course of the total output power P _mains 68 the heating unit 14 and the further heating unit 16 . A power curve shows a time course of the output power P _IPM 28 the heating unit 14 . A power curve shows a time course of the output power P _RHA 28 the further heating unit 16 . The total output power P _mains 68 results from the sum of the output power P _IPM 28 and the output power P _RHA 28 .

The control unit 12 operates the heating unit 14 continuously throughout the operating period 18th . The control unit 12 changes a form factor of the output power to control the flicker parameter 28 the heating unit 14 .

The control unit 12 controls a flicker parameter. The control unit 12 changes a form factor of the total output power to control the flicker parameter P _mains 68 the heating unit 14 . The form factor is with an envelope of the power curve of the output power 28 and / or the total output power P _mains 68 connected.

In the first time interval 20th operates the control unit 12 the heating unit 14 constant with a maximum output power 28 . The maximum output power 28 is in the present case in the entire operating period 18th 3.6 kW. In the first time interval 20th holds the control unit 12 the further heating unit 16 deactivated. The output power 28 the further heating unit 16 is in the first time interval 20th 0 W. The heating unit 14 and the further heating unit 16 point in the first time interval 20th a finite and constant total output P _mains 68 on.

The control unit 12 leads between the first time interval 20th and the second time interval 22 a transition period 24th a.

In the transition period 24th holds the control unit 12 the further heating unit 16 deactivated. The output power 28 the further heating unit 16 is in the transition period 24th 0 W.

The control unit 12 is intended to be in the transition period 24th a total output power P _mains 68 to change continuously. The control unit 12 changed in the transition period 24th the output power 28 the heating unit 14 linear in time. The output power 28 the heating unit 14 is in the transition period 24th falling linearly. The total output power P _mains 68 falls in the transition period 24th from the maximum output power 28 with 3.6 kW to about a third of the maximum output power 28 .

Alternatively, it is also conceivable for a control unit 12 in the transition period 24th the output power 28 and thus the total output power P _mains 68 changed exponentially.

The output power 28 the heating unit 14 in a transition area between the first Time interval 20th and the transition time interval 24th is steady and free of a jump point, a peak performance and / or a drop in performance. The output power 28 the heating unit 14 in a transition area between the transition time interval 24th and the second time interval 22 is steady and free of a jump point, a peak performance and / or a drop in performance.

The output power 28 the heating unit 14 at the beginning of the transition period 24th corresponds to the output power 28 the heating unit 14 at one end of the first time interval 20th The output power 28 the heating unit 14 at one end of the transition period 24th corresponds to the output power 28 the heating unit 14 at the beginning of the second time interval 22 . The control unit 12 is intended to change the output power 28 in the combination time interval 26 to take over.

The control unit 12 is provided in the transition period 24th a heating frequency of the heating unit 14 to change. Furthermore, the control unit 12 provided for in the transition period 24th a phase and / or a duty cycle of the heating unit 14 to keep constant. Alternatively, it is also conceivable in the transition period 24th a duty cycle and / or a phase of the heating unit 14 to change and in particular to keep a heating frequency constant. A control unit could also be used 12 to be provided in the transition period 24th an output power 28 the heating unit 14 to change exponentially.

The control unit 12 operates the further heating unit 16 in exactly one time interval. The control unit 12 operates the further heating unit 16 in the second time interval 22 . The control unit 12 operates the further heating unit 16 in the second time interval 22 with a constant output power 28 .

The control unit 12 forms the second time interval 22 as a combination time interval 26 out. In the combination time interval 26 operates the control unit 12 the heating unit 14 and the further heating unit 16 at the same time.

At the beginning of the second time interval 22 increases the control unit 12 the output power 28 the heating unit 14 until the total output power P _mains 68 a maximum value P _max reached. An increase in output power 28 the heating unit 14 by the control unit 12 at the beginning of the second time interval 22 serves to make a smooth transition between the transition time interval 24th and the second time interval 22 to design.

The control unit 12 carries out another transition period 30th a. The control unit 12 arranges the further transition time interval 30th temporally after the second time interval 22 on.

The output powers 28 the heating unit 14 in the transition period 24th and in the further transition period 30th have a symmetrical course to one another.

In the further transition period 30th holds the control unit 12 the further heating unit 16 deactivated. The output power 28 the further heating unit 16 is in the further transition period 30th 0 W.

The control unit 12 is intended to the total output power P _mains 68 in the further transition period 30th to change continuously. The control unit 12 is intended to output power 28 in the further transition period 30th to change continuously. The control unit 12 changes the output power 28 the heating unit 14 linear in time. The output power 28 the heating unit 14 is in the further transition period 30th increasing linearly. The total output power P _mains 68 increases in the further transition period 30th about a third of the maximum output power 28 to the maximum output power 28 from 3600 W.

Alternatively, it is also conceivable for a control unit 12 the output power 28 and thus the total output power P _mains 68 in the further transition period 30th changed exponentially.

The output power 28 the heating unit 14 in a transition area between the second time interval 22 and the further transition time interval 30th is steady and free of a jump point, a peak performance and / or a drop in performance.

The control unit 12 leads a third time interval 70 a. The output power 28 the heating unit 14 in a transition area between the further transition time interval 30th and the third time interval 70 is steady and free of a jump point, a peak performance and / or a drop in performance.

The output power 28 the heating unit 14 at the beginning of the further transition period 30th corresponds to the output power 28 the heating unit 14 at an end of the second time interval 22 .

The output power 28 the heating unit 14 at one end of the further transition period 30th corresponds to the output power 28 the heating unit 14 at the beginning of the third time interval 70 . The control unit 12 is intended to changed output power 28 at the end of the further transition period 30th in the third time interval 70 to take over.

The control unit 12 a heating frequency of the heating unit is provided 14 in the further transition period 30th to change. Furthermore, the control unit 12 provided for in the further transition period 30th a phase and / or a duty cycle of the heating unit 14 to keep constant. Alternatively, it is also conceivable in the further transition period 30th a duty cycle and / or a phase of the heating unit 14 to change and in particular to keep a heating frequency constant. A control unit could also be used 12 to be provided an output power 28 the heating unit 14 in the further transition period 30th to change exponentially.

In the third time interval 70 operates the control unit 12 the heating unit 14 constant with a maximum output power 28 . The maximum output power 28 is in the present case in the entire operating period 18th 3600 kW. In the third time interval 70 holds the control unit 12 the further heating unit 16 deactivated. The output power 28 the further heating unit 16 is in the third time interval 70 0 W. The heating unit 14 and the further heating unit 16 point in the third time interval 70 a finite and constant total output P _mains 68 on.

In 3rd is a process diagram of a method according to the invention for operating the oven device 10th shown. The process has two process steps.

In one acquisition step 72 operating parameters are recorded. The operating parameters can be changed by an operator on the control panel 52 can be entered and / or through an external unit to the oven device 10th are transmitted and / or from a memory module of the control unit 12 be retrieved. The operating parameters can include, for example, a cooking time, a cooking temperature, a cooking scheme and / or a cooking process monitoring regulation.

In one execution step 74 becomes a control scheme 58 to control the heating unit 14 and the further heating unit 16 created. In the execution step 74 becomes an operating period 18th with three time intervals 20th , 22 , 70 fixed. In the execution step 74 a transition time interval becomes a control of at least one flicker parameter 24th and another transition period 30th introduced. The control of the flicker parameter is done by adjusting the output power 28 the heating unit 14 and the further heating unit 16 accomplished. In the execution step 74 becomes the heating unit 14 and the further heating unit 16 in a periodic continuous heating mode with the operating period 18th with the first time interval 20th , the second time interval 22 , the third time interval 70 , the transition time interval 24th and the further transition time interval 30th controlled repetitively and supplied with electrical energy. The control scheme 58 is repeated periodically.

In the figures, only one of multiple objects is provided with a reference symbol.

Reference symbol list

10th

Oven device

12

Control unit

14

Heating unit

16

Heating unit

18th

Operating period

20th

Time interval

22

Time interval

24th

Transition time interval

26

Combination time interval

28

Output power

30th

Transition time interval

32

Induction heating unit

34

Circulating air heating unit

36

Heating resistance element

38

Oven

40

Induction oven

42

Recording room

44

Wall

46

Wall

48

Wall

50

fan

52

Control panel

54

Display

56

Rotary switch

58

Control scheme

60

Upper heating unit

62

Sub-heating unit

64

Axis of abscissa

66

Ordinate axis

68

Total output power

70

Time interval

72

Acquisition step

74

Execution step

QUOTES INCLUDE IN THE DESCRIPTION

This list of documents listed by the applicant has been generated automatically and is only included for the better information of the reader. The list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions.

Non-patent literature cited

• DIN EN 61000-3-3 standard [0006]

Claims (15)

Oven device, in particular induction oven device, with a control unit (12) which, in a periodic continuous heating operating state, for repetitive activation and energy supply of at least one heating unit (14) and at least one further heating unit (16) with an operating period (18) with at least a first time interval (20 ) and at least one second time interval (22) is provided, characterized in that the control unit (12) is provided to insert at least one transition time interval (24) between the first time interval (20) and the second time interval (22) in order to insert at least one Check the flicker parameter. Oven device after Claim 1 , characterized in that the control unit (12) is provided to keep at least one of the heating units (14, 16) deactivated in the transition time interval (24). Oven device after Claim 1 or 2nd , characterized in that the control unit (12) is designed to design the second time interval (22) as a combination time interval (26) in which the control unit (12) operates the heating unit (14) and the further heating unit (16) simultaneously. Cooking device according to one of the preceding claims, characterized in that the control unit (12) is provided to change at least one form factor of an output power (28) of the heating unit (14) to control the flicker parameter. Cooking device according to one of the preceding claims, characterized in that the control unit (12) is provided in the transition time interval (24) to change an output power (28) of the heating unit (14) and the changed output power (28) in the combination time interval (26) to take over. Cooking device according to one of the preceding claims, characterized in that the control unit (12) is provided for introducing at least one further transition time interval (30) and arranging it in time after the second time interval (22). Oven device after Claim 6 , characterized in that the control unit (12) is provided for changing an output power (28) of the heating unit (14) in the further transition time interval (30). Oven device after Claim 6 or 7 , characterized in that the output powers (28) of the heating unit (14) have a mutually symmetrical course in the transition time interval (24) and in the further transition time interval (30). Cooking oven device according to one of the preceding claims, characterized in that an output power (28) of the heating unit (14) has a variable course in the transition time interval (24). Oven device after Claim 9 , characterized in that the course of the output power (28) is continuous. Cooking oven device according to one of the preceding claims, characterized in that the heating units (14, 16) are of different heating types. Oven device after Claim 11 , characterized in that the heating unit (14) is designed as an induction heating unit (32). Oven device after Claim 11 or 12 , characterized in that the further heating unit (16) is designed as a circulating air heating unit (34) and has at least one heating resistance element (36). Cooking oven with at least one cooking device (10) according to one of the preceding claims. Method for operating a cooking device (10), in particular an induction cooking device, in particular according to one of the Claims 1 to 13 , in which at least one heating unit (14) and at least one further heating unit (16) in a periodic continuous heating operating state with an operating period (18) with at least a first time interval (20) and at least a second time interval (22) are controlled and supplied with electrical energy are characterized in that at least one transition time interval (24) is inserted between the first time interval (20) and the second time interval (22) to check at least one flicker parameter.

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