EP4215021A1 - Induktionsgargerätevorrichtung - Google Patents
InduktionsgargerätevorrichtungInfo
- Publication number
- EP4215021A1 EP4215021A1 EP21773585.1A EP21773585A EP4215021A1 EP 4215021 A1 EP4215021 A1 EP 4215021A1 EP 21773585 A EP21773585 A EP 21773585A EP 4215021 A1 EP4215021 A1 EP 4215021A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- unit
- filter unit
- power supply
- induction cooking
- power
- 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.)
- Pending
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
Definitions
- the invention relates to an induction cooking device according to the preamble of claim 1.
- a cooking appliance device with a main filter and a secondary filter is already known from the prior art, with the main filter filtering only one power unit and the secondary filter being permanently connected to a power supply unit.
- a cooking appliance device with a main filter for filtering a power unit and with a secondary filter for filtering a power supply unit is already known from the prior art, with the power unit being filtered in addition to the power unit by the main filter in one operating mode of the power unit.
- the object of the invention is in particular to provide a generic device with improved properties in terms of efficiency.
- the object is achieved according to the invention by the features of claim 1, while advantageous refinements and developments of the invention can be found in the dependent claims.
- the invention is based on an induction cooking appliance device, in particular an induction hob device, with at least one power unit which is intended to supply at least one induction heating unit with electricity in an operating state, with a power supply unit which is intended for supplying energy to at least one further unit in the operating state with a main filter unit for filtering the power unit and with a secondary filter unit for filtering the power unit.
- the main filter unit and the secondary filter unit are designed at least partially in one piece and share at least one common filter unit for filtering the power supply unit in an inactive mode of the power unit.
- a particularly efficient induction cooking appliance device can advantageously be provided by such a configuration. If the main filter unit and the sub-filter terü share at least one common filter unit for filtering the power supply unit in the inactive mode of the power unit, a required filter power of the secondary filter unit to comply with standards relating to electromagnetic compatibility can advantageously be reduced. As a result, a number of components of the secondary filter unit can advantageously be reduced and cost efficiency can be increased. In particular, an additional capacitor that would otherwise be required in the secondary filter unit can advantageously be dispensed with, since this can be part of the common filter unit, as a result of which a discharge unit for discharging this capacitor can also advantageously be dispensed with and the cost efficiency can be further improved. In addition, an installation space can advantageously be used particularly efficiently and a particularly compact design can thus be achieved. Furthermore, a structural arrangement can advantageously be improved. Furthermore, an energy consumption of the power supply unit in the inactive mode can advantageously be reduced.
- An “induction cooking device device”, in particular an “induction oven device”, should be understood to mean at least a part, in particular a subassembly, of an induction cooking device.
- An induction cooking appliance having the induction cooking appliance device could be embodied, for example, as an induction oven or as an induction grill.
- the induction cooking appliance device could be an induction oven device or an induction grill device.
- An induction cooking appliance having the induction cooking appliance device is preferably designed as an induction hob.
- the induction cooking appliance device is preferably an induction hob device.
- the induction cooking appliance device preferably has the at least one induction heating unit.
- the induction heating unit is part of the induction cooking appliance having the induction cooking appliance device.
- the induction heating unit is preferably provided for the purpose of supplying energy to at least one cooking utensil and/or a cooking chamber in at least one operating state by means of an alternating electromagnetic field for the purpose of heating.
- the power unit In the operating state, the power unit preferably carries out a frequency conversion and in particular converts a low-frequency AC voltage on the input side into a high-frequency AC voltage on the output side.
- the low-frequency AC voltage preferably has a frequency of at most 100 Hz.
- the high-frequency AC voltage has a frequency of at least 1000 Hz.
- the power unit is preferably provided for setting the electrical power of the induction heating unit at least by setting the high-frequency AC voltage.
- the power unit preferably comprises at least one rectifier.
- the power unit preferably has at least one heating frequency element, which is designed in particular as an inverter.
- the heating frequency element preferably generates an oscillating electric current for operating the induction heating unit, preferably with a frequency of at least 15 kHz, in particular at least 17 kHz and advantageously at least 20 kHz.
- the inverter comprises at least two insulated-gate bipolar transistors and particularly advantageously at least one snubber capacitor.
- the power supply unit is preferably designed as an electrical and/or electronic unit which is intended to supply at least one further unit with electrical energy which, in particular, requires a voltage other than that provided by a power supply network.
- the power supply unit In the operating state and/or in the inactive mode, the power supply unit preferably provides at least one DC voltage at at least one output of the power supply unit.
- the power supply unit preferably has at least two, in particular at least three and advantageously a plurality of outputs at which, in particular, different electrical voltages, preferably DC voltages, can be tapped.
- the power supply unit is preferably used to supply energy to at least one control unit and/or at least one driver unit of the power unit and/or an operator interface and/or at least one measuring unit, in particular a temperature and/or voltage and/or current measuring unit, and/or at least one Cooling fan provided.
- the control unit is preferably embodied as an electronic unit which comprises a computing unit and, in particular, in addition to the computing unit, a memory unit with a control program stored therein.
- the control unit is preferably provided at least to control and/or regulate at least the power unit with the aid of control signals.
- the control unit preferably controls the power unit, in particular the inverter of the power unit.
- An “inactive mode” should be understood to mean a mode in which an electrical supply to the power unit, in particular an electrical connection between the power supply network and the power unit, is interrupted. In the inactive mode, at least the power supply unit and particularly preferably only the power supply unit is electrically connected to the power supply network. In the inactive mode, in particular, an electrical connection between the power supply network and the power unit is disconnected and/or interrupted.
- the main filter unit preferably has at least one filter element which, in at least one operating mode, assumes at least one filter function, preferably a low-pass filter function for minimizing high-frequency noise.
- the main filter unit preferably has at least one fuse, which opens a circuit in the event of a short circuit.
- the main filter unit preferably has at least one capacitor, preferably a class X2 capacitor, which is intended to reduce electromagnetic interference.
- the main filter unit preferably has at least one discharge unit, which discharges the X2 capacitor in the inactive mode.
- the main filter unit preferably assumes an overvoltage protection function, in particular by means of at least one varistor of the main filter.
- the main filter comprises in particular at least one choke, in particular a current-compensated choke, and/or at least one capacitor and/or at least one varistor, in particular at least the varistor.
- the main filter is provided for filtering the power unit and/or power supply unit. In the operating state outside of the idle mode, the main filter unit preferably filters the power unit and the power supply unit.
- the secondary filter unit preferably has at least one filter element which, at least in the inactive mode, assumes at least one filter function, in particular for reducing electromagnetic interference which can be caused by the power supply network and/or the power supply unit.
- the secondary filter unit has a significantly lower power consumption in the inactive mode than the main filter in the operating state.
- the secondary filter in the inactive mode, could advantageously consume a maximum of 200 mW of power of at most 150 mW, particularly advantageously of at most 100 mW and preferably of at most 50 mW.
- the main filter unit could have a power consumption of 5 W to 10 W, for example.
- the main filter unit and the secondary filter unit are preferably formed at least partially in one piece with one another in such a way that at least one element of the main filter unit and at least one element of the secondary filter unit are electrically conductively connected to one another at least in the inactive mode, preferably permanently, via at least one connection.
- the common filter unit preferably comprises at least one filter element, preferably at least one main filter coil, which is assigned to the main filter unit in at least one operating mode of the power unit that differs from the inactive mode and which is electrically conductively connected to the secondary filter unit at least in the inactive mode.
- Provided is intended to mean specifically designed and/or equipped.
- the fact that an object is provided for a specific function should be understood to mean that the object fulfills and/or executes this specific function in at least one application and/or operating state.
- the induction cooking appliance device has a switching element which is electrically upstream of the main filter unit and is provided for switching the power unit on and off.
- a switching element which is electrically upstream of the main filter unit and is provided for switching the power unit on and off.
- Such a configuration can advantageously further improve efficiency. If the switching element is electrically upstream of the main filter unit, capacitors of the main filter unit are advantageously not exposed to any transient processes in the power supply network, such as transient compensating currents and/or compensating voltages, during the inactive mode, which advantageously extends the service life of the capacitors and thus a particularly long-lasting and reliable one Induction cooking device can be provided. Furthermore, overvoltage protection can advantageously be simplified and/or improved if the switching element is electrically upstream of the main filter unit.
- the switching element can be designed as a mechanical or as an electromechanical switching element, in particular as a relay.
- the switching element could be designed as a semiconductor switching element, for example as a transistor or the like.
- the induction cooking appliance device has a first conductor connection, which is provided for connection to a conductor of a power supply network, with the switching element being arranged between the main filter unit and the first conductor connection.
- a first conductor connection is preferably designed as an outer conductor connection and is intended for connection to an outer conductor of a power supply network.
- the induction cooking appliance device has a second conductor connection, which is provided for a connection to a neutral conductor of a power supply network, the common filter unit being able to be connected to the power supply network via the second conductor connection.
- the second conductor connection is preferably designed as a neutral conductor connection and is intended for connection to a neutral conductor of a power supply network.
- the second conductor connection could be in the form of a further outer conductor connection and be provided for connection to a further outer conductor of a power supply network.
- an impedance of the secondary filter unit is variable depending on a switch position of the switching element. As a result, interference signals can advantageously be reduced in a particularly reliable manner.
- the secondary filter unit when the switch position of the switching element is in the closed position, the secondary filter unit has a greater impedance, in particular a greater input impedance and/or output impedance, than the main filter unit.
- a greater impedance in particular a greater input impedance and/or output impedance
- the main filter unit can be bypassed and high-frequency interference signals can penetrate can be prevented effectively and with simple technical means via the secondary filter unit in the power supply network. Due to capacitive and/or inductive filter elements of the main filter unit, the impedance of the main filter unit changes with the frequency of a signal present at the main filter unit.
- the main filter unit preferably has a low impedance for low-frequency signals, in particular for low-frequency AC voltages and/or AC currents, which are provided by a power supply network, usually at a frequency of 50 Hz or 60 Hz, and for high-frequency signals, in particular for high-frequency interference signals a frequency of at least 9 kHz, has an increased impedance, so that the introduction of high-frequency interference signals into the power supply network is prevented.
- the secondary filter unit preferably has both for low-frequency signals and for high-frequency signals has a greater impedance, in particular a greater input impedance and/or output impedance, than the main filter unit for all high-frequency interference signals which can occur in the operating state of the power unit.
- the secondary filter unit has a non-linear electronic component, which is provided to enable the power supply unit to be connected to a power supply network via the secondary filter unit in the inactive mode.
- the power supply unit can advantageously be supplied with energy in the inactive mode using simple technical means.
- the non-linear electronic component is preferably connected in an electrically conductive manner to the external conductor connection and is intended to enable the power supply unit to be connected to an external conductor of the power supply network in the inactive mode.
- the non-linear electronic component preferably has a forward voltage characteristic or a forward current characteristic, which is such that a forward voltage or a forward current is caused by a voltage drop across the non-linear electronic component in the inactive mode or by a voltage drop across the non-linear electronic component in the inactive mode Current applied to the component is exceeded, so that a current flow from the outer conductor connection via the non-linear electronic niche component to the power supply unit is enabled.
- the forward voltage characteristic or the forward current characteristic of the non-linear electronic component is preferably selected in such a way that a current flow through the secondary filter unit in the operating state of the power unit is prevented and, in particular, the non-linear component is prevented from opening by short-term voltage and/or current peaks, which are caused in particular by high-frequency interference signals can be prevented.
- This can advantageously prevent the main filter unit from being bypassed and interference signals from penetrating into the power supply network via the secondary filter unit.
- the secondary filter unit to have at least one further non-linear electronic component which interacts with the non-linear electronic component in order to enable the power supply unit to be connected to the power supply network via the secondary filter unit.
- the non-linear electronic component is in the form of a suppressor diode.
- Such a configuration can advantageously enable the power supply unit to be connected to the power supply network via the secondary filter unit particularly quickly and/or reliably in the inactive mode.
- the main filter unit can advantageously be bypassed by interference signals via the secondary filter unit, both for interference signals caused by the device, i.e. interference signals which are caused by the power unit and/or the power supply unit, and for interference signals caused by the network, using particularly simple technical means if the non-linear electronic component is designed as a suppressor diode.
- the non-linear electronic component could be designed as a voltage-controlled triac and/or as a current-controlled triac.
- the non-linear component is designed as a diac and/or as a varistor and/or as a zener diode and/or as a voltage clamp and/or as another non-linear electronic component that appears sensible to a person skilled in the art .
- the secondary filter unit has at least one filter coil.
- filtering of the power supply unit in the inactive mode can advantageously be achieved with particularly simple technical means.
- the secondary filter unit could have a plurality of filter coils connected in parallel and/or in series with one another.
- the secondary filter unit exactly one filter coil.
- the secondary filter unit has an electrical resistance which is arranged in series with the filter coil and is provided for limiting the inrush current.
- Such a configuration can advantageously provide effective protection against damage to the filter coil due to excessive inrush currents.
- a particularly cost-effective inrush current limitation can advantageously be made possible.
- the secondary filter unit it would be conceivable for the secondary filter unit to have a thermistor (NTC resistor) which is arranged in series with the filter coil and is provided for limiting the inrush current.
- NTC resistor thermistor
- the secondary filter unit has a protective element which is arranged parallel to the filter coil and is provided to protect the filter coil from overvoltages.
- a protective element which is arranged parallel to the filter coil and is provided to protect the filter coil from overvoltages.
- the protective element could, without being limited to this, be designed as a suppressor diode and/or as a protective diode and/or as a protective capacitor. In an advantageous embodiment, however, it is proposed that the protective element be designed as a varistor. As a result, particularly effective overvoltage protection for the filter coil can advantageously be ensured, in particular even in the case of high overvoltages.
- the invention also relates to an induction cooking appliance, in particular an induction hob, with an induction cooking appliance according to one of the configurations described above.
- an induction cooking device is characterized in particular by the aforementioned advantageous properties of the induction cooking device.
- a particularly cost-effective induction cooking appliance can be provided which at the same time has particularly reliable properties with regard to electromagnetic compatibility.
- the induction cooking device should not be limited to the application and embodiment described above.
- the induction cooking Apparatus for fulfilling a function described herein have a number of individual elements, components and units that differs from a number mentioned herein.
- FIG. 2 shows a schematic diagram of the induction cooking appliance device with a power unit, a power supply unit, a main filter unit and a secondary filter unit,
- FIG. 3 shows a schematic electrical circuit diagram of the induction cooking appliance device
- FIG. 4 shows a schematic electrical circuit diagram of the induction cooking appliance device in an inactive mode of the power unit
- FIG. 5 shows a schematic electrical circuit diagram of the induction cooking appliance device in an operating state of the power unit.
- FIG. 1 shows an induction cooking appliance 40.
- the induction cooking appliance 40 is designed as an induction hob.
- the induction cooking device 40 has a mounting plate 42 .
- the induction cooking appliance 40 has an induction cooking appliance device 10 .
- the induction cooking device 10 has an induction heating unit 14 .
- the induction heating unit 14 is provided for heating at least one set of cookware (not shown) on the mounting plate 42 of the induction cooking device 40 .
- the induction cooking appliance device 10 has at least one further unit 18 .
- the further unit 18 is embodied as an operator interface 44 .
- FIG. 2 shows a schematic diagram of the induction cooking device 10.
- the induction cooking device 10 has a power unit 12 .
- the power unit 12 When the induction cooking appliance 10 is in an operating state, the power unit 12 is provided to supply at least the induction heating unit 14 with electricity.
- the power unit 12 has at least one inverter (not shown) which, when the power unit 12 is in an operating state, converts a low-frequency AC voltage provided by a power supply network 46 into a high-frequency AC voltage.
- the induction cooking appliance device 10 has a power supply unit 16 .
- the power supply unit 16 is provided for supplying energy to at least the further unit 18 .
- the induction cooking device 10 has a main filter unit 20 .
- the main filter unit 20 is provided for filtering the power unit 12 in the operating state.
- the main filter unit 20 filters the power unit 12 and the power supply unit 16 in the operating state.
- the induction cooking device 10 has a secondary filter unit 22 .
- the secondary filter unit 22 is provided for filtering the power supply unit 16 at least when the power unit 12 is in an inactive mode.
- the induction cooking appliance device 10 has a switching element 26 .
- the switching element 26 is electrically upstream of the main filter unit 20 .
- the switching element 26 is provided for switching the power unit 12 on and off.
- FIG. 3 shows a schematic electrical circuit diagram of the induction cooking device 10.
- the induction cooking device 10 has a first conductor connection 28.
- the first conductor connection 28 is provided for connection to a conductor (not shown) of the power supply network 46 (cf. FIG. 2).
- the first conductor connection 28 is designed as an outer conductor connection and is intended for a connection to an outer conductor (not shown) of the power supply network 46 .
- the switching element 26 is arranged between the main filter unit 20 and the first conductor connection 28 .
- the induction cooking appliance device 10 has a second conductor connection 30 .
- the second conductor connection 30 is provided for a connection to a further conductor (not shown) of the power supply network 46 .
- the second conductor connection 30 is designed as a neutral conductor connection and is intended for a connection to a neutral conductor (not shown) of the power supply network 46 .
- the second conductor connection 30 could also be in the form of a further outer conductor connection and be provided for a connection to a further outer conductor (not shown) of the power supply network 46 .
- Figure 4 shows a schematic electrical circuit diagram to show the induction cooking device 10 in the inactive mode of the power unit 12.
- the switching element 26 is open.
- the main filter unit 20 and the secondary filter unit 22 are formed at least partially in one piece.
- the main filter unit 20 and the secondary filter unit 22 share at least one common filter unit 24.
- the common filter unit 24 comprises a main filter coil 52 and a further main filter coil 54.
- the common filter unit 24 is connected to the power supply network 46 via the second conductor connection 30 (see FIG. 2) can be connected.
- the secondary filter unit 22 has a non-linear electronic component 32 .
- the non-linear electronic component 32 is intended to enable the power supply unit 16 to be connected to the power supply network 46 via the secondary filter unit 22 in the inactive mode.
- the non-linear electronic component 32 is embodied as a suppressor diode 48 .
- the power supply unit 16 can be connected to the further conductor (not shown) of the power supply network 46 via the common filter unit 24 by means of the second conductor connection 30 .
- the power supply unit 16 can be connected to the conductor (not shown) of the power supply network 46 via the secondary filter unit 22 by means of the first conductor connection 28 .
- the secondary filter unit 16 is connected to the first conductor connection 28 via a connection point 62 .
- the connection point 62 is electrically upstream of the switching element 26 .
- the secondary filter unit 22 of the induction cooking device 10 has a filter coil 34 .
- the filter coil 34 is provided for filtering the power supply unit 16 in the inactive mode.
- the secondary filter unit 22 has an electrical resistance 36 .
- the electrical resistor 36 is arranged in series with the filter coil 34 .
- the electrical resistor 36 is provided to limit the inrush current to protect the filter coil 34 from damage caused by excessive inrush currents.
- the secondary filter unit 22 has a protective element 38 .
- the protective element is arranged parallel to the filter coil 34 .
- the protective element 38 is provided to protect the filter coil 34 against overvoltages.
- the protective element 38 is designed as a varistor 50 .
- the protective element 38 designed as a varistor 50 enables the filter unit to be protected even in the event of high overvoltages.
- Figure 5 shows a schematic electrical circuit diagram of the induction cooking device 10 to show the operating state of the power unit 12.
- the switching element 26 is closed and the power unit 12 is connected to the power supply network 46 via the main filter unit 20 by means of the first conductor connection 28 and the second conductor connection 30 .
- the power supply unit 16 is connected to the power supply network 46 via the main filter unit 20 by means of the first conductor connection 28 and the second conductor connection 30 .
- the power supply unit 16 is connected to the first conductor connection 28 via a further connection point 64 which is electrically downstream of the main filter unit 20 .
- a current flow from the first conductor connection 28 to the power supply unit via a diode 68 and a further diode 74 is enabled.
- the Power supply unit 16 is connected to the second conductor connection 30 via a further connection point 66 which is electrically downstream of the main filter unit 20 .
- current can flow from the second conductor connection 30 to the power supply unit 16 via a further diode 70 .
- a further diode 72 prevents a current flow in the direction of the secondary filter unit 22 in the operating state.
- the power supply unit 16 is thus filtered via the main filter 20 in the operating state of the power unit 12 .
- the main filter unit 20 has the main filter coil 52 and the further main filter coil 54 and two further main filter coils 58, 60 for filtering the power unit 12 and the power supply unit 16 in the operating state.
- the main filter unit 20 has an X2 capacitor 76 and two further X2 capacitors 78, 80 for filtering the power unit 12 and the power supply unit 16 in the operating state.
- the main filter unit 20 provides a significantly increased filter performance compared to the secondary filter unit 22 .
- the secondary filter unit 22 has an impedance which is variable depending on a switch position of the switching element 26 .
- the secondary filter unit 22 has a greater impedance, in particular a greater input impedance and/or output impedance, than the main filter unit 20.
- the impedance of the main filter unit 20 is frequency-dependent. For signals with a low frequency, in particular for signals from the power supply unit 46 with a mains frequency of typically 50 Hz or 60 Hz, the main filter unit represents a low impedance.
- the main filter unit 20 has an increased impedance.
- the impedance of the secondary filter unit 16 is designed such that it also has a higher impedance than the main filter unit 20 for high-frequency interference signals 56, so that these are filtered by the main filter unit 20 when the power unit 12 is in the operating state and a short circuit of the main filter unit 20 via the secondary filter unit 22 is prevented.
- connection point further connection point diode further diode further diode further diode further diode X2-capacitor further X2-capacitor further X2-capacitor
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Induction Heating Cooking Devices (AREA)
- Filters And Equalizers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20382827 | 2020-09-18 | ||
| PCT/EP2021/074762 WO2022058229A1 (de) | 2020-09-18 | 2021-09-09 | Induktionsgargerätevorrichtung |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4215021A1 true EP4215021A1 (de) | 2023-07-26 |
Family
ID=72709300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21773585.1A Pending EP4215021A1 (de) | 2020-09-18 | 2021-09-09 | Induktionsgargerätevorrichtung |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US20230292410A1 (de) |
| EP (1) | EP4215021A1 (de) |
| WO (1) | WO2022058229A1 (de) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2025114205A1 (de) * | 2023-11-30 | 2025-06-05 | BSH Hausgeräte GmbH | Kochfeldvorrichtung, kochfeld und verfahren zu einem betrieb einer kochfeldvorrichtung |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5233890B2 (ja) * | 2009-07-22 | 2013-07-10 | パナソニック株式会社 | 電磁調理器 |
| ES2643136T5 (en) * | 2011-03-29 | 2026-03-03 | Bsh Hausgeraete Gmbh | Switch device |
| US20180176997A1 (en) * | 2016-12-15 | 2018-06-21 | Haier Us Appliance Solutions, Inc. | Ac decoupling and filtering of multi-channel quasi-resonant (qr) inverters in induction cooktops |
-
2021
- 2021-09-09 EP EP21773585.1A patent/EP4215021A1/de active Pending
- 2021-09-09 US US18/019,252 patent/US20230292410A1/en active Pending
- 2021-09-09 WO PCT/EP2021/074762 patent/WO2022058229A1/de not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022058229A1 (de) | 2022-03-24 |
| US20230292410A1 (en) | 2023-09-14 |
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