EP4079103A1 - Induktionsenergieübertragungssystem - Google Patents
InduktionsenergieübertragungssystemInfo
- Publication number
- EP4079103A1 EP4079103A1 EP20816982.1A EP20816982A EP4079103A1 EP 4079103 A1 EP4079103 A1 EP 4079103A1 EP 20816982 A EP20816982 A EP 20816982A EP 4079103 A1 EP4079103 A1 EP 4079103A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- unit
- switching
- induction
- transmission system
- supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
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
- H05B6/06—Control, e.g. of temperature, of power
- H05B6/062—Control, e.g. of temperature, of power for cooking plates or the like
-
- 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
- H05B6/1209—Cooking devices induction cooking plates or the like and devices to be used in combination with them
- H05B6/1236—Cooking devices induction cooking plates or the like and devices to be used in combination with them adapted to induce current in a coil to supply power to a device and electrical heating devices powered in this way
Definitions
- the invention relates to an induction energy transmission system according to the preamble of claim 1 and a method for operating an induction energy transmission system according to the preamble of claim 13.
- An induction energy transmission system with a supply unit designed as a hob for inductive provision of energy and with a receiving unit designed as cooking utensil with a receiving element for receiving the inductively provided energy is already known from the prior art.
- the cookware also has at least one further functional unit which has at least one function that differs from heating the food and can be supplied with part of the energy inductively received by the receiving element.
- the object of the invention is in particular, but not limited to, to provide a generic system with improved properties with regard to the control of a switching unit.
- the object is achieved according to the invention by the features of claims 1 and 13, while advantageous refinements and developments of the invention can be found in the subclaims.
- the invention is based on an induction energy transmission system, in particular an induction cooking system, with a supply unit, which has at least one supply induction element for inductively providing energy, with at least one receiving unit, which has at least one receiving induction element for receiving the inductively provided energy, with a switching unit which comprises at least two switching elements for providing an alternating current for the supply induction element, and with a control unit for controlling the switching unit.
- the control unit adapts at least one switching parameter of a switching parameter set to at least one of the switching elements in order to set a supply power.
- the control of the switching unit can be improved by the configuration according to the invention.
- energy efficiency can advantageously be improved.
- an improved setting of a supply performance can advantageously be achieved.
- the supply power can advantageously be provided over a large power range, in particular evenly. In this way, a system with an expanded range of functions can advantageously be provided, which in particular can improve comfort and / or an operating experience for a user.
- further units of the receiving unit which are inductively supplied with energy, in particular motor-driven and speed-controlled further units, such as stirrers, in particular due to reduced power fluctuations in the output power, can advantageously be operated more evenly.
- additional units of the receiving unit which have an energy store, can advantageously be charged in a particularly simple and / or gentle manner for the energy store.
- an “induction energy transmission system” is to be understood in particular as a system which has at least one supply unit and at least one receiving unit and which has a main functionality in the form of wireless energy transmission.
- the induction energy transmission system could be designed as an induction hand tool machine system.
- the receiving unit could be designed as a handheld power tool, such as a drill and / or an electric screwdriver and / or a hammer drill and / or a saw.
- the supply unit and / or the receiving unit could each be designed as a sub-unit of a transformer, in particular as a primary coil and / or as a secondary coil of a transformer.
- the induction energy transmission system could in particular be provided for at least one self-propelled work device and / or for at least one remote control and / or for at least one remote control.
- the recording unit could be designed as a self-propelled work device and / or as a remote control and / or as a remote control.
- the self-propelled work device could be.
- the self-propelled work device could be.
- the remote control and / or the remote control could in particular be used to operate and / or control at least one blind and / or at least one electrical device, in particular at least one household electrical device, and / or at least one model object, such as a model car and / or a model airplane and / or a model boat, can be provided.
- the recording unit of the induction energy transmission system could be designed as a means of transportation, in particular as an electric vehicle or as a hybrid vehicle or as an electric bicycle or as an electric scooter or as another fully or partially electrically operated means of transportation.
- the induction energy transmission system is preferably designed as an induction cooking system with at least one further main function that deviates from a cooking function.
- the induction energy transmission system could be designed as an induction oven system and / or as an induction grill system.
- the supply unit could be designed as an induction oven and / or as an induction grill.
- the induction energy transmission system is advantageously designed as an induction hob system.
- the supply unit is then designed in particular as an induction hob.
- a “supply unit” is to be understood as meaning, in particular, a unit which provides inductive energy in at least one operating state and which in particular has a main functionality in the form of energy supply.
- the supply unit has in particular at least one supply induction element which in particular has at least one coil, in particular at least one primary coil, and / or is designed as a coil and which provides inductive energy in particular in the operating state.
- the supply unit could have at least two, in particular at least three, advantageously at least four, particularly advantageously at least five, preferably at least eight and particularly preferably several supply induction elements, which in the operating state could each provide inductive energy, in particular to a particularly single receiving unit or at least two or more receiving units.
- any one of the supply induction elements could be arranged in the vicinity of at least one further of the supply induction elements. At least some of the supply induction elements could for example be arranged in a row and / or in the form of a matrix.
- a “receiving unit” is to be understood as meaning, in particular, a unit which, in at least one operating state, in particular inductively, receives energy and wel- che in particular has at least one other main function that differs from heating. In particular, it is conceivable that the receiving unit exclusively has functions that differ from heating.
- the receiving unit comprises at least one receiving induction element which has at least one secondary coil and / or is designed as a secondary coil and which in particular receives inductively energy in at least one operating state.
- the receiving unit could, for example, have at least one consumer which could in particular consume energy in the operating state.
- the receiving unit could, for example, be a handheld power tool, such as a drill and / or an electric screwdriver and / or a hammer drill and / or a saw, and / or a car and / or a mobile device, such as a laptop and / or a tablet and / or a mobile phone and / or a remote control and / or a remote control and / or a self-propelled implement.
- the receiving unit could be designed as a means of transportation, in particular as an electric vehicle or as a hybrid vehicle or as an electric bicycle or as an electric scooter or as another fully or partially electrically operated means of transportation.
- a main function of the receiving unit could for example include drilling and / or hammering and / or sawing and / or screwing and / or data processing and / or telephoning and / or driving.
- a main function of the recording unit is in particular inductive recording and provision of energy for at least one household function other than heating food.
- the energy absorbed by the receiving unit could in particular be converted directly into at least one further energy form in the operating state, such as, for example, mechanical energy for driving another unit, for example a stirrer, and / or chemical energy for storage in at least one energy storage device, for example a battery pack.
- a “switching unit” should be understood to mean, in particular, a unit with at least two switching elements which are provided in particular to establish and / or separate an electrically conductive connection between two contacts of the switching element.
- a switching element preferably has at least one control contact via which it can be controlled, in particular by the control unit.
- the switching element as a semiconductor switching element, in particular as a transistor, is advantageous as a bipolar transistor with preferably insulated gate electrode (IGBT) is formed.
- the switching element can be designed as a mechanical and / or electromechanical switching element, in particular as a relay.
- the switching element can be designed as an FET, as a MOSFET, preferably as an RC-IGBT and particularly preferably as a HEMT transistor.
- the switching unit can comprise a plurality of switching elements which can be connected to one another in series and / or in parallel, for example.
- the switching elements can be connected in an electrically conductive manner to at least one supply induction element of the supply unit, in particular in at least one operating state, and form a resonant circuit with this in cooperation with at least one capacitor.
- the switching elements of the switching unit are preferably arranged in a half-bridge topology. Alternatively, it is conceivable that the switching elements of the switching unit are arranged in a full bridge topology and / or in another topology that appears sensible to a person skilled in the art.
- a “control unit” is to be understood in particular as an electronic unit that is preferably at least partially integrated in a control and / or regulating unit of the supply unit and / or the receiving unit.
- the control unit preferably comprises a computing unit and, in particular, in addition to the computing unit, a memory unit with at least one control and / or regulating program stored therein, which is provided to be executed by the computing unit.
- a “switching parameter set” should be understood to mean, in particular, a set of at least one switching parameter and preferably a plurality of switching parameters.
- a switching parameter set is at least one switching parameter associated with a switching element of the switching unit.
- a “switching parameter” is to be understood in particular as a parameter which, when the switching unit is in operation, is directly in the area of influence of the control unit and / or can be controlled and / or regulated by the latter.
- the switching parameter can be within the sphere of influence of a user and thus be controlled and / or selected indirectly or directly by a user.
- 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 is to be understood in particular to mean that the object has this specific function Function fulfilled and / or carried out in at least one application and / or operating state.
- the switching parameter set comprises at least one switch-on time of at least one of the switching elements. In this way, particularly flexible control of the supply power provided by the supply unit can advantageously be made possible. It is also proposed that the switching parameter set includes at least one switch-on duration of at least one of the switching elements. In this way, flexibility with regard to the control of the supply power provided by the supply unit can advantageously be further improved. Alternatively or additionally, it would be conceivable that the switching parameter set comprises at least one switching frequency.
- the receiving unit comprises at least one motor for driving at least one further element, which can be supplied with energy by the receiving induction element.
- the receiving unit comprises at least one motor for driving at least one further element, which can be supplied with energy by the receiving induction element.
- the receiving unit has the further element, which is designed as a mechanical food processing element, in particular as a kneading hook and / or as a stirrer and / or as a mixer.
- a “food processing element” is to be understood as meaning in particular an element which is provided to, in at least one operating state, at least one food which is in particular arranged in a food receiving space of the receiving unit, in particular in a manner different from heating and / or in a way that goes beyond pure heating, and which in particular has at least one processing tool which is provided to be in direct contact with the food in at least one operating state.
- the food processing element is in particular intended to process, in particular and / or mix, at least one food arranged in the food receiving space in at least one operating state and / or to stir and / or to grind and / or to comminute and / or to mix and / or to emulsify and / or to knead and / or to cut up.
- the food processing element is in particular provided to set in motion at least one food arranged in the food receiving space in at least one operating state, in particular starting from at least one resting state and / or keeping it moving in particular starting from a moving state.
- the food processing element is particularly intended to process different types and / or consistencies of food, such as dough and / or liquid and / or at least partially fluid materials and / or sauces and / or at least partially solid food.
- the receiving unit has several, in particular interchangeable, food processing elements, which in particular can each be supplied with energy by the motor, in particular can be driven at different speeds.
- a high level of comfort can be achieved in this way.
- a high degree of flexibility can be achieved.
- a further switching unit which operates the control unit in the operating state with a further switching parameter set which differs from the first switching parameter set by at least one switching parameter.
- the supply unit have at least one further supply induction element, which is supplied with energy by the further switching unit in the operating state.
- a first supply induction element provides a first intake induction element inductively with a first supply power
- the control unit operating the switching unit with a first set of switching parameters to set the first supply power and at the same time at least one further supply induction element with at least one further intake induction element with one of the first supply power supplies various further supply power, the control unit operating the further switching unit with the further switching parameter set to set the further supply power.
- a high degree of flexibility can be achieved in this way.
- the receiving unit has at least one energy store for storing electrical energy.
- energy store is to be understood in particular as a component which can absorb, store and release energy, in particular chemical and / or preferably electrical energy.
- the energy store can be designed as an electrochemical capacitor and / or as a fuel cell.
- the energy store is preferably designed as a battery store, in particular as an accumulator.
- the energy store is provided to store energy inductively absorbed by at least one intake induction element of the intake unit and to make it available at a later point in time, in particular for performing at least one household function other than heating. In this way, a high degree of flexibility can advantageously be made possible.
- the receiving unit is designed as a portable small household appliance that can be at least partially supplied with energy by the energy storage device, for example as a portable kitchen appliance and / or as a portable mixer and / or stirrer, and / or the receiving unit is at least one portable and an element that can be supplied with energy by the energy store, for example a portable temperature measuring device.
- the energy storage device can advantageously be charged without additional chargers and / or charging cables, whereby a high level of user satisfaction can particularly advantageously be achieved.
- the supply unit be designed as a hob, in particular as an induction hob.
- a multifunctional hob can advantageously be provided.
- a hob can be provided which, in addition to the heating of items to be cooked, has additional functions, for example inductive charging of at least one energy store and / or provision of ductile energy for at least one main function of the installation unit that deviates from heating, in particular for mixing and / or stirring and / or kneading and / or comminuting food.
- a high level of user satisfaction can particularly advantageously be achieved.
- the receiving unit be designed as a stand-up unit.
- a multifunctional installation unit in particular cookware with a large number of functions, can advantageously be provided.
- a high level of user satisfaction can be achieved in a particularly advantageous manner.
- a “set-up unit” is to be understood as meaning, in particular, a unit which is to be coupled with the supply unit, in particular with the supply induction element, is provided and which receives and / or absorbs energy from the supply unit in at least one operating state, in particular in the course of coupling with the supply unit.
- the installation unit could, for example, be designed as cooking utensils and / or have at least one cooking utensils.
- the setting-up unit could have at least one support unit, which could be provided in particular for setting up at least one cookware, in particular the cookware.
- the support unit could in particular be provided for an arrangement between a mounting plate of the supply unit, in particular the supply unit formed as a hob, and the cookware.
- the installation unit could have at least one housing unit, which could in particular be designed as an outer housing unit and in particular could define an outer housing.
- at least one object of the installation unit in particular at least the receiving induction elements and / or the further unit and / or the further receiving induction element and / or the control unit, could be at least partially and advantageously at least largely integrated in the housing unit.
- the invention is also based on a method for operating an induction energy transmission system, in particular an induction cooking system, with a supply unit, which has at least one supply induction element that provides inductive energy, with at least one receiving unit, which has at least one receiving induction element that inductively receives provided energy, and with a switching unit which has at least two switching elements that provide an alternating current for the supply induction element.
- a supply power is set by adapting at least one switching parameter of a switching parameter set to at least one of the switching elements. In this way, a method for improved control of the switching unit can advantageously be provided.
- the induction energy transmission system is not intended to be restricted to the application and embodiment described above.
- the induction energy transmission system can be used to fulfill a mode of operation described herein have a number that differs from a number of individual elements, components and units mentioned herein.
- FIG. 1 shows a supply unit of an induction energy transmission system designed as a hob
- Fig. 2 shows a part of the induction energy transmission system with the Versor supply unit and a unit designed as a cooking utensil
- FIG. 3 shows a schematic circuit diagram of a switching unit of the induction energy transmission system
- FIG. 5 is a diagram showing a relationship between a switching parameter of the switching parameter set and a supply line
- Fig. 6 is a diagram to illustrate a further relationship between tween a further switching parameter of the switching parameter set and a supply power
- FIG 8 shows another embodiment of an induction energy transmission system.
- FIG. 1 shows a supply unit 12a of an induction energy transmission system 10a.
- the supply unit 12a is designed as a hob 18a.
- the supply unit has a supply induction element 14a.
- the induction energy transfer transmission system 10a has a switching unit 26a.
- the switching unit 26a comprises a first switching element 28a and a second switching element 30a.
- the switching elements 28a, 30a are provided to provide an alternating current 32a for the supply induction element 14a.
- the induction energy transmission system 10a has a control unit 34a for controlling the switching unit 26a.
- the induction energy transmission system 10a has a further supply induction element 16a.
- the induction energy transmission system 10a has a further switching unit 52a.
- the further supply induction element 16a is supplied with energy via the further switching unit 52a.
- the further switching unit 52a can be controlled via the control unit 52a.
- the further switching unit 52a is constructed essentially identically to the switching unit 26a, which is why the following description with regard to the mode of operation of the switching unit 26a can be transferred to the switching unit 52a.
- FIG. 2 shows the induction energy transmission system 10a with the supply unit 12a and with a receiving unit 22a.
- the receiving unit 22a comprises a receiving induction element 24a.
- the intake induction element 24a is provided to receive the energy inductively provided by the supply induction element 14a.
- the receiving unit 16a is designed as an erection unit 62a, in particular as a piece of cookware.
- the erection unit 62a has a receiving space 114a.
- the receiving space 114a is provided for receiving food.
- the receiving unit 22a comprises a motor 46a.
- the motor 46a can be supplied with energy by the intake induction element 24a.
- the receiving unit 22a comprises a further element 48a.
- the further element 48a is designed as a food processing element 50a, specifically as a stirrer.
- the motor 46a is provided to drive the further element 48a. In one operating state, the motor 46a drives the further element 48a, which is embodied as a food processing element 50a, to rotate about an axis of rotation 116a in order to stir food located in the receiving space 114a.
- FIG. 3 shows the switching unit 26a of the induction energy transmission system 10a.
- the switching unit 26a has the first switching element 28a and the second switching element 30a.
- the first switching element 28a and the second switching element 30a are each as Transistors, specifically as bipolar transistors with an insulated gate electrode (IGBT), formed from.
- IGBT insulated gate electrode
- the switching elements 28a, 30a of the switching unit 26a can be controlled individually by the control unit 34a.
- the switching unit 26a has a first capacitor element 78a and a first diode element 80a.
- the switching unit 26a has a second capacitor element 82a and a second diode element 84a.
- the switching unit is connected to a voltage source 86a.
- the control unit 34a alternately controls the switching elements 28a, 30a within an operating period of a period 64a.
- the first switching element 28a is switched to electrically conductive by the control unit 34a and forms a first resonant circuit 90a with the supply induction element 14a and the first capacitor element 78a.
- the second switching element 30a is switched to electrically conductive by the control unit 34a and forms a second resonant circuit 92a with the supply induction element 14a and the second capacitor element 82a.
- the control unit 34a adapts at least one switching parameter 38a of a switching parameter set 40a of at least one of the switching elements 28a, 30a (see FIG. 4).
- FIG. 4 shows in a synopsis of three diagrams an exemplary course of an alternating current 32a provided in the operating state by the switching elements 28a, 30a of the switching unit 26a for the supply induction element 14a for a supply power 36a of, for example, 1400 W, which is provided by the supply induction element 14a.
- a time is plotted on an abscissa 66a of a first diagram.
- a voltage applied to the first switching element 28a is plotted on an ordinate 68a of the first diagram.
- a time is plotted on an abscissa 70a of a second diagram.
- a voltage applied to the second switching element 30a is plotted on an ordinate 72a.
- a time is plotted on an abscissa 74a of a third diagram.
- the switching unit 34a adapts the switching parameters 38a of the switching parameter set 40a of the second switching element 30a.
- the switching parameter set 40a comprises a switch-on time 42a and a switch-on duration 44a of the second switching element 30a, which are shown in the second diagram.
- the control unit 34a operates the further switching unit 52a with a further switching parameter set which differs from the switching parameter set 40a by at least one of the switching parameters 38a. For example, it is conceivable that the control unit 34a only changes a switch-on duration of a switching element (not shown) of the switching unit 52a in order to set a supply power different from the supply power 36a.
- FIG. 5 shows, by way of example, the relationship between the supply power 36a in watts, which is shown on an ordinate 102a in FIG. 5, as a function of the switch-on time 42a, which is shown on an abscissa in FIG.
- the control unit 34a can select the switch-on time 42a in a range of half the period duration 88a minus the switch-on duration 44a.
- the possible range of the switch-on time 42a within half a period 88a is shown as a phase angle from 0 ° to 180 ° on an abscissa 100a.
- the supply power 36a can be reduced by changing the switch-on time 42a, starting from a maximum supply power 108a at low phase angles, down to a value of 0 W at a phase angle close to 180 °.
- FIG. 6 shows, by way of example, the relationship between the supply power 36a in watts, which is shown on an ordinate 106a in FIG. 6, as a function of the switch-on duration 44a, which is shown on an abscissa 104a in FIG.
- the control unit 34a can adjust the switch-on duration 44a in a range of half the period duration 88a.
- the possible range of the switch-on duration 44a of half the period duration 88a is shown as a phase angle from 0 ° to 180 ° on the abscissa 104a.
- a method for operating the induction energy transmission system 10a is shown schematically in FIG.
- the method comprises a first method step 110a and a second method step 112a.
- the desired supply power 36a is selected by a user via the control unit 34a.
- the supply power 36a is set by adapting at least one switching parameter 38a of the switching parameter set 40a of at least one of the switching elements 28a, 30a of the switching unit 26a.
- FIG. Another embodiment of the invention is shown in FIG. The following descriptions are essentially limited to the differences between the exemplary embodiments, reference being made to the description of the exemplary embodiment in FIGS. 1 to 7 with regard to components, features and functions that remain the same.
- FIG. 8 relates to a further exemplary embodiment of an induction energy transmission system 10b with a supply unit 12b, a receiving unit 22b, a switching unit 26b and a control unit 34b.
- the supply unit 12b, the switching unit 26b and the control unit 34b are each designed essentially identical to the supply unit 12a of the switching unit 26a and that of a control unit 34b of the induction energy transmission system 10a.
- the induction energy transmission system 10b differs from the induction energy transmission system 10a essentially with regard to the design of the receiving unit 22b.
- the receiving unit 22b is designed as a portable temperature measuring device 118b.
- the receiving unit 22b has a receiving induction element 24b.
- the receiving induction element 24b is provided for receiving an inductively provided energy by a supply induction element 14b of the supply unit 12b.
- the receiving unit 22b has an energy store 58b.
- the energy store is designed as an accumulator, specifically as a lithium-ion accumulator.
- the energy store 58b is provided for storing the energy received by the intake induction element 24b.
- the receiving unit 22b can be placed on the supply unit 12b, as shown in FIG.
- the charged energy store 58b gradually emits the stored energy to carry out at least one function of the receiving unit 22b, in the present embodiment for measuring and displaying a temperature.
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Food-Manufacturing Devices (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP19383130 | 2019-12-17 | ||
| PCT/EP2020/084276 WO2021122000A1 (de) | 2019-12-17 | 2020-12-02 | Induktionsenergieübertragungssystem |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP4079103A1 true EP4079103A1 (de) | 2022-10-26 |
| EP4079103B1 EP4079103B1 (de) | 2025-08-27 |
Family
ID=69185294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20816982.1A Active EP4079103B1 (de) | 2019-12-17 | 2020-12-02 | Induktionsenergieübertragungssystem |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP4079103B1 (de) |
| WO (1) | WO2021122000A1 (de) |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102006017801A1 (de) * | 2006-04-18 | 2007-11-15 | BSH Bosch und Siemens Hausgeräte GmbH | Energieversorgungseinheit |
| CN107295813A (zh) * | 2015-02-02 | 2017-10-24 | 三菱电机株式会社 | 非接触电力传送装置、电气设备以及非接触电力传送系统 |
| KR102413857B1 (ko) * | 2017-08-31 | 2022-06-28 | 엘지전자 주식회사 | 회로 구조가 개선된 유도 가열 및 무선 전력 전송 장치 |
-
2020
- 2020-12-02 WO PCT/EP2020/084276 patent/WO2021122000A1/de not_active Ceased
- 2020-12-02 EP EP20816982.1A patent/EP4079103B1/de active Active
Also Published As
| Publication number | Publication date |
|---|---|
| EP4079103B1 (de) | 2025-08-27 |
| WO2021122000A1 (de) | 2021-06-24 |
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