EP3653936B1 - Ofen und verfahren zum betrieb - Google Patents

Ofen und verfahren zum betrieb Download PDF

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Publication number
EP3653936B1
EP3653936B1 EP18206818.9A EP18206818A EP3653936B1 EP 3653936 B1 EP3653936 B1 EP 3653936B1 EP 18206818 A EP18206818 A EP 18206818A EP 3653936 B1 EP3653936 B1 EP 3653936B1
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EP
European Patent Office
Prior art keywords
oven
wall
type
exterior
adjacent
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EP18206818.9A
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English (en)
French (fr)
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EP3653936A1 (de
Inventor
Sergen BILGIÇ
Hüseyin Ílker TURGUT
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Vestel Elektronik Sanayi ve Ticaret AS
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Vestel Elektronik Sanayi ve Ticaret AS
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements
    • F24C7/067—Arrangement or mounting of electric heating elements on ranges

Definitions

  • the present disclosure relates to an oven and a method of operating an oven.
  • An oven is an apparatus for heating and cooking items such as foodstuffs.
  • a traditional oven comprises a heating chamber contained within a housing into which the items to be heated are placed.
  • a heating element is located in the heating chamber. The heating element controllably generates heat within the heating chamber such that any items placed inside the heating chamber will be heated. Thus, a foodstuff can be heated by placing it in the heating chamber.
  • an oven comprising: a plurality of walls defining a heating chamber for receiving items to be heated; a heating element located inside the heating chamber, the heating element being movable within the heating chamber; a sensor for obtaining a determination of the type of material adjacent the exterior of at least one wall of the oven; and a controller configured to: estimate the type of material adjacent the exterior of the at least one wall of the oven based on the determination of the type of material obtained by the sensor; and cause the heating element to move towards or away from the at least one wall depending on the type of material adjacent the exterior of the at least one wall.
  • the senor is an acoustic sensor for obtaining a determination of the type of material adjacent the exterior of the at least one wall of the oven based on the acoustic properties of the material.
  • the oven comprises a sound emitter for outputting a sound towards material that is adjacent the exterior of the at least one wall of the oven, and wherein the sensor is configured to obtain a determination of the type of material adjacent the exterior of the wall based on a measure of one or more properties of the sound that is reflected back from the material.
  • the controller is configured to estimate the type of material adjacent the exterior of the at least one wall of the oven by searching a look-up table which contains data for types of material and corresponding acoustic properties.
  • the controller is configured to obtain a measure of the thermal conductivity of the estimated type of material and cause the heating element to move towards or away from the at least one wall depending on the thermal conductivity of the type of material.
  • the controller is configured to obtain a measure of the thermal conductivity of the type of material by searching by searching a look-up table which contains data for types of material and corresponding thermal conductivity.
  • the oven comprises data storage which stores the look-up table.
  • the oven comprises a plurality of sensors, each sensor being arranged to obtain a determination of the type of material adjacent the exterior of a respective wall of the oven.
  • the oven comprises a motor for moving the heating element within the heating chamber, and wherein the controller is configured to cause the heating element to move by operating the motor.
  • a method of operating an oven comprising: obtaining a determination of the type of material adjacent the exterior of at least one wall of the oven; estimating the type of material adjacent the exterior of the at least one wall of the oven based on the obtained determination of the type of material; and moving a heating element located inside a heating chamber of the oven towards or away from the at least one wall depending on the type of material adjacent the exterior of the at least one wall.
  • the method comprises: obtaining a determination of the type of material adjacent the exterior of the at least one wall of the oven based on the acoustic properties of the material.
  • the method comprises: outputting a sound towards material that is adjacent the exterior of the at least one wall of the oven; and obtaining a determination of the type of material adjacent the exterior of the wall based on a measure of one or more properties of the sound that is reflected back from the material.
  • the method comprises: estimating the type of material adjacent the exterior of the at least one wall of the oven by searching a look-up table which contains data for types of material and corresponding acoustic properties.
  • the method comprises: obtaining a measure of the thermal conductivity of the estimated type of material and causing the heating element to move towards or away from the at least one wall depending on the thermal conductivity of the type of material.
  • the method comprises operating a motor to move the heating element within the heating chamber.
  • An oven is an apparatus for heating and cooking items such as foodstuffs.
  • a traditional oven comprises a heating chamber contained within a housing into which the items to be heated are placed.
  • a heating element is located in the heating chamber.
  • the heating element controllably generates heat within the heating chamber such that any items placed inside the heating chamber will be heated.
  • a foodstuff can be heated by placing it in the heating chamber.
  • the heating chamber may be surrounded by thermal insulation, which reduces heat loss from the heating chamber to the surrounding environment.
  • An oven in a modern kitchen is often integrated into a fitted kitchen.
  • the oven may be located between two other units, which are usually cabinets.
  • Heat from the oven can be lost from the oven, through the various walls of the housing and to the surrounding environment.
  • the heat loss through the different walls of the oven occurs at different heat loss rates depending on the structure and the properties of the material that is adjacent the wall. For example, if a top wall of the oven is adjacent a marble worktop and a side wall of the oven is adjacent a wooden cabinet then the heat loss from the top wall will be different from the heat loss from the side wall.
  • Figures 1 , 2 and 3 show schematically an oven 1.
  • the oven 1 is provided as a standalone oven.
  • the oven 1 is provided as part of, or integrated into, a more complex cooking apparatus, such as a cooker having one or more cooking rings.
  • the oven 1 has a housing formed from a plurality of walls. The plurality of walls define a heating chamber 2 for receiving items to be heated, such as foodstuffs.
  • the oven 1 comprises a front wall 3 and a back wall 4, a left side wall 5 and a right side wall 6, and a top wall 7 and a bottom wall 8.
  • the front wall 3 is or includes a door. The door can be opened to permit access to the heating chamber 2, and closed to prevent access to the heating chamber 2.
  • a heating element 9 is located inside the heating chamber 2.
  • a plurality of heating elements 9 are located inside the heating chamber 2.
  • the heating element 9 is operated to increase the temperature inside of the heating chamber 2.
  • the heating element 9 is an electric coil, which converts electricity into heat using for example resistive or inductive heating.
  • the heating element 9 may be another type of heating element such as a gas burner, which converts gas fuel into heat.
  • the heating element 9 is movable within the heating chamber 2, such that the heating element 9 can be moved towards or away from at least one of the walls of the oven 1.
  • the heating element 9 is movable between a plurality of predetermined positions located within the heating chamber 2.
  • the oven 1 has a sensor for obtaining a determination of the type of material adjacent the exterior of at least one of the plurality of walls.
  • the oven 1 includes a plurality of sensors. Each sensor in this example is arranged to obtain a determination of the type of material adjacent the exterior of a respective wall 3-8 of the oven 1. Each sensor may be located adjacent a respective wall 3-8 of the oven 1. In one example, each sensor is attached to a respective wall 3-8 of the oven 1.
  • the oven 1 has a front wall sensor 10 attached to the front wall 3 (the door in this example); a back wall sensor 11 attached to the back wall 4; a left side wall sensor 12 attached to the left side wall 5; a right side wall sensor 13 attached to the right side wall 6; a top wall sensor 14 attached to the top wall 7; and a bottom wall sensor 15 attached to the bottom wall 8.
  • Each of the sensors 10-15 is arranged to obtain a determination of the type of material adjacent the exterior of its respective wall 3-8.
  • the oven 1 includes a controller 16 (such as a processor, a micro-processor, or the like).
  • the controller 16 is configured to estimate the type of material adjacent the exterior of at least one of the walls of the oven 1 based on a measurement obtained by the one or more sensors 10-15.
  • the controller 16 is also configured to cause the heating element 9 to move towards or away from at least one wall of the oven 1 depending on the type of material that is adjacent the exterior of the wall.
  • the controller 16 is configured to move the heating element 9 to a position that minimises heat loss from the heating chamber 2. This heat loss depends, at least partially, on the physical properties (such as thermal conductivity) of the materials exterior to the walls of the oven 1.
  • the type of material that is to the exterior of each wall of the oven 1 is dependent on the location that the oven 1 is situated within a kitchen. Since an oven 1 can be placed in many different locations within a kitchen, it is important to be able to identify the particular type of material so that heat loss can be minimised.
  • the controller 16 may be configured to move the heating element 9 away from a wall that is adjacent a material having a relatively high thermal conductivity (e.g. a metal or concrete) because heat is lost easily from the heating chamber 2 through this wall.
  • the controller 16 may be configured to move the heating element 9 towards a wall that is adjacent a material having a relatively low thermal conductivity (e.g. polystyrene foam or an insulated building wall) because heat is not easily lost from the heating chamber 2 through this wall. This helps to reduce heat loss from the heating chamber 2.
  • each sensor 10-15 is an acoustic sensor for obtaining a determination of the type of material adjacent the exterior of a wall based on the acoustic properties of the material.
  • the controller 16 can estimate the particular type of material because different types of material exhibit different acoustic properties.
  • each sensor 10-15 is a different type of sensor that can obtain a determination of the type of a material.
  • the oven 1 includes a sound emitter 18 for outputting a sound towards material that is adjacent the exterior of a wall of the oven 1.
  • the sound emitter 18 may emit sound at a specific frequency.
  • the or each sensor is configured to obtain a determination of the type of material adjacent the wall based on a measure of one or more properties of the sound that is reflected back from the material.
  • the or each sensor is configured to obtain a determination of the type of material adjacent the wall based on a measure of the speed of the sound reflected back from the material to the sensor.
  • the or each sensor is configured to obtain a determination of the type of material adjacent the wall based on a measure of the time taken for the sound to reflect back from the material to the sensor.
  • the sound emitter 18 may be configured so that it can output sound omnidirectionally.
  • the oven 1 includes a plurality of sound emitters 18.
  • a sound emitter 18 may be located adjacent each sensor 10-15 such that there is a dedicated sound emitter 18 for each wall 3-8 for outputting sound towards material adjacent the exterior of the wall 3-8.
  • the controller 16 may be configured to estimate the type of material adjacent the exterior of a wall of the oven by searching a look-up table which contains data for different types of material and their corresponding acoustic properties.
  • the oven 1 includes a data storage 17 which stores the look-up table.
  • the controller 16 is configured to obtain a measure of the thermal conductivity of a type of material adjacent the exterior of a wall of the oven 1.
  • the controller 16 may obtain a measure of the thermal conductivity of a material by searching a look-up table which contains data for different types of material and their corresponding thermal conductivity.
  • the data storage 17 may store the look-up table.
  • the controller 16 can then use this information to obtain a measure of the thermal conductivity of the material.
  • the measure of the thermal conductivity of the material can be used by the controller 16 when determining whether to cause the heating element 9 to move towards or away from a particular wall.
  • the controller 16 is configured to cause each of the plurality of heating elements 9 to move towards or away from at least one wall of the oven 1 as necessary depending on the type of material that is adjacent the exterior of the wall.
  • the controller 16 therefore causes each of the plurality of heating elements 9 to move location within the heating chamber 2 as necessary in order to minimise heat loss from the heating chamber 2.
  • one or more of the heating elements 9 may be movable and one or more of the heating elements 9 may be fixed.
  • the controller 16 is configured to estimate the type of material adjacent the exterior of multiple walls at the same time.
  • the controller 16 may be configured to estimate the type of material adjacent the exterior of left side wall 5 and the right side wall 6 at the same time.
  • the controller 16 is configured to estimate the type of material adjacent the exterior of one or more walls more frequently than other walls. That is, the controller 16 may effectively test or poll the thermal properties of one or more walls more frequently than other walls. This may be useful if the controller 16 estimates that the exterior of that wall is adjacent a type of material having a high thermal conductivity.
  • the oven 1 comprises a motor 19 for moving the heating element 9 within the heating chamber 2.
  • the controller 16 is configured to cause the heating element 9 to move by operating the motor 19.
  • the motor 19 may be, for example, an electric motor.
  • the motor 19 is attached the heating element 9 so that it moves within the heating chamber 2 as the heating element 9 moves.
  • there may be a corresponding number of motors 19, one for each movable heating element 9.
  • FIG 4 shows schematically the oven 1 of Figures 1 , 2 and 3 when integrated into a fitted kitchen.
  • the oven 1 is positioned between a first cabinet 20 and a second cabinet 21.
  • the first cabinet 20 is located adjacent the exterior of the left side wall 5 of the oven 1
  • the second cabinet 21 is located adjacent the exterior of the right side wall 6 of the oven 1.
  • a worktop 22 sits on top of the oven 1 and on top of the first and second cabinets 20, 21. Therefore, the worktop 22 is located adjacent the exterior of the top wall 7 of the oven 1.
  • the oven 1 and the first and second cabinets 20, 21 are resting on a floor 23 such that the floor 23 is located adjacent the exterior of the bottom wall 8 of the oven 1.
  • the oven 1 and the first and second cabinets 20, 21 back on to a wall 24 such that the wall 24 is located adjacent the exterior of the back wall 4 of the oven 1.
  • the materials that are adjacent the exterior of the different walls 3-8 of the oven 1 (e.g. the materials forming the cabinets 20, 21, the worktop 22, the floor 23 and the wall 24) in general have different heat loss properties, including in particular their thermal conductivity.
  • thermal conductivities of examples of different materials commonly found in a kitchen
  • this table is stored as information on the data storage 17.
  • Type of Material Thermal Conductivity W/(m K) Wood (Oak) 0.14 Air 0.26 Brick 0.70 Concrete 1.40 Marble 2.08
  • the controller 16 begins the process of estimating the type of material adjacent the exterior of each wall of the oven 1 by instructing the or each sound emitter 18 to output sound towards the material that is adjacent a respective wall 3-8 of the oven 1.
  • the sound output from the sound emitter 18 reflects back from the materials and towards the one or more sensors 10-15.
  • the or each sensor 10-15 then senses the sound that is reflected back from the material adjacent the exterior of its respective wall 3-8.
  • the controller 16 analyses the reflected sound that is detected by the or each sensor 10-15.
  • the controller 16 estimates the type of material that is adjacent the exterior of each wall 3-8 based on the acoustic properties of the material.
  • the controller 16 estimates the type of material by searching information in a look-up table stored in the data storage 17 to find a type of material having the same acoustic properties as that sensed by the or each sensor 10-15.
  • the controller 16 determines whether to cause the heating element 9 (or in one example the plurality of heating elements 9) to move towards or away from one or more walls 3-8 of the oven 1, based on the estimated type of material that is adjacent the exterior of the one or more walls 3-8.
  • the controller 16 seeks to cause the heating element 9 to move to a position inside the heating chamber 2 that will minimise, or at least reduce, heat loss from the heating chamber 2.
  • the controller 16 determines that it should cause the heating element 9 to move towards a wall 3-8 having an exterior that is adjacent a material having a lower thermal conductivity because heat is not easily lost from the heating element 9 through this wall.
  • the controller 16 determines that it should cause the heating element 9 to move away from a wall 3-8 having an exterior that is adjacent a material having a higher thermal conductivity in order to reduce the heat loss through this wall.
  • the controller 16 can cross reference each estimated type of material with the thermal conductivities stored in the data storage 17 (e.g. as shown in Table A) to obtain a measure of the thermal conductivity of the material adjacent the exterior of the one or more walls 3-8.
  • the controller 16 causes the heating element 9 to move towards or away from one or more walls 3-8 of the oven 1, depending on the type of material that is adjacent the exterior of the one or more walls 3-8, by operating the motor 19.
  • the controller 16 causes the heating element 9 to move towards a wall 3-8 having an exterior that is adjacent oak because oak has a relatively low thermal conductivity.
  • the controller 16 causes the heating element 9 to move away from a wall 3-8 having an exterior that is adjacent marble because marble has a relatively high thermal conductivity.
  • An advantage of the described arrangement is that the controller 16 can move the heating element 9 (or the plurality of heating elements 9) to a location within the heating chamber 2 of the oven 1 where heat loss from the heating chamber 2 can be reduced. This increases the efficiency of heating the heating chamber 2 and reduces the amount of energy required to heat the heating chamber 2, which consequently reduces the operating costs of the oven 1 and the environmental impact caused by operating the oven 1.
  • processor or processing system or circuitry referred to herein may in practice be provided by a single chip or integrated circuit or plural chips or integrated circuits, optionally provided as a chipset, an application-specific integrated circuit (ASIC), field-programmable gate array (FPGA), digital signal processor (DSP), graphics processing units (GPUs), etc.
  • the chip or chips may comprise circuitry (as well as possibly firmware) for embodying at least one or more of a data processor or processors, a digital signal processor or processors, baseband circuitry and radio frequency circuitry, which are configurable so as to operate in accordance with the exemplary embodiments.
  • the exemplary embodiments may be implemented at least in part by computer software stored in (non-transitory) memory and executable by the processor, or by hardware, or by a combination of tangibly stored software and hardware (and tangibly stored firmware).
  • a hard disk and non-volatile semiconductor memory e.g. a solid-state drive or SSD.
  • the invention also extends to computer programs, particularly computer programs on or in a carrier, adapted for putting the invention into practice.
  • the program may be in the form of non-transitory source code, object code, a code intermediate source and object code such as in partially compiled form, or in any other non-transitory form suitable for use in the implementation of processes according to the invention.
  • the carrier may be any entity or device capable of carrying the program.
  • the carrier may comprise a storage medium, such as a solid-state drive (SSD) or other semiconductor-based RAM; a ROM, for example a CD ROM or a semiconductor ROM; a magnetic recording medium, for example a floppy disk or hard disk; optical memory devices in general; etc.
  • SSD solid-state drive
  • ROM read-only memory
  • magnetic recording medium for example a floppy disk or hard disk
  • optical memory devices in general etc.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Stoves And Ranges (AREA)

Claims (15)

  1. Ofen, aufweisend:
    mehrere Wände, die eine Heizkammer zum Aufnehmen von zu beheizenden Gegenständen definieren;
    ein in der Heizkammer befindliches Heizelement, wobei das Heizelement in der Heizkammer bewegbar ist,
    wobei der Ofen dadurch gekennzeichnet ist, dass er ferner aufweist:
    einen Sensor zum Erlangen einer Bestimmung der Materialart neben der Außenseite wenigstens einer Wand des Ofens; und
    eine Steuerung, die konfiguriert ist, um: die Materialart neben der Außenseite der wenigstens einen Wand des Ofens basierend auf der vom Sensor erlangten Bestimmung der Materialart einzuschätzen; und das Heizelement abhängig von der Materialart neben der Außenseite der wenigstens einen Wand hin oder weg zu/von der wenigstens einen Wand bewegen zu lassen.
  2. Ofen nach Anspruch 1, bei welchem der Sensor ein akustischer Sensor zum Erlangen einer Bestimmung der Materialart neben der Außenseite der wenigstens einen Wand des Ofens basierend auf den akustischen Eigenschaften des Materials ist.
  3. Ofen nach Anspruch 2, aufweisend einen Schallemitter zum Ausgeben eines Schalls hin zum Material, das neben der Außenseite der wenigstens einen Wand des Ofens ist, und bei welchem der Sensor konfiguriert ist, um eine Bestimmung der Materialart neben der Außenseite der Wand basierend auf einem Maß von ein oder mehr Eigenschaften des Schalls, der vom Material zurückreflektiert wird, zu erlangen.
  4. Ofen nach Anspruch 2 oder Anspruch 3, bei welchem die Steuerung konfiguriert ist, um die Materialart neben der Außenseite der wenigstens einen Wand des Ofens durch Durchsuchen einer Nachschlagetabelle einzuschätzen, die Daten für Materialarten und entsprechende akustische Eigenschaften enthält.
  5. Ofen nach einem der Ansprüche 1 bis 4, bei welchem die Steuerung konfiguriert ist, um ein Maß der Wärmeleitfähigkeit der eingeschätzten Materialart zu erlangen und das Heizelement abhängig von der Wärmeleitfähigkeit der Materialart hin oder weg zu/von der wenigstens einen Wand bewegen zu lassen.
  6. Ofen nach Anspruch 5, bei welchem die Steuerung konfiguriert ist, um ein Maß der Wärmeleitfähigkeit der Materialart durch Durchsuchen einer Nachschlagetabelle zu erlangen, die Daten für Materialarten und entsprechende Wärmeleitfähigkeit enthält.
  7. Ofen nach Anspruch 4 oder Anspruch 6, aufweisend einen Datenspeicher, der die Nachschlagetabelle speichert.
  8. Ofen nach einem der Ansprüche 1 bis 7, aufweisend mehrere Sensoren, wobei jeder Sensor angeordnet ist, um eine Bestimmung der Materialart neben der Außenseite einer jeweiligen Wand des Ofens zu erlangen.
  9. Ofen nach einem der Ansprüche 1 bis 8, aufweisend einen Motor zum Bewegen des Heizelements in der Heizkammer, und bei welchem die Steuerung konfiguriert ist, um das Heizelement durch Betreiben des Motors bewegen zu lassen.
  10. Verfahren zum Betreiben eines Ofens nach Anspruch 1, wobei das Verfahren aufweist:
    Erlangen einer Bestimmung der Materialart neben der Außenseite wenigstens einer Wand des Ofens;
    Einschätzen der Materialart neben der Außenseite der wenigstens einen Wand des Ofens basierend auf der erlangten Bestimmung der Materialart; und
    Bewegen eines in einer Heizkammer des Ofens befindlichen Heizelements hin oder weg zu/von der wenigstens einen Wand abhängig von der Materialart neben der Außenseite der wenigstens eine Wand.
  11. Verfahren nach Anspruch 10, aufweisend:
    Erlangen einer Bestimmung der Materialart neben der Außenseite der wenigstens einen Wand des Ofens basierend auf den akustischen Eigenschaften des Materials.
  12. Verfahren nach Anspruch 11, aufweisend:
    Ausgeben eines Schalls hin zum Material, das neben der Außenseite der wenigstens einen Wand des Ofens ist; und
    Erlangen einer Bestimmung der Materialart neben der Außenseite der Wand basierend auf einem Maß von ein oder mehr Eigenschaften des Schalls, der vom Material zurückreflektiert wird.
  13. Verfahren nach einem der Ansprüche 10 bis 12, aufweisend:
    Einschätzen der Materialart neben der Außenseite der wenigstens einen Wand des Ofens durch Durchsuchen einer Nachschlagetabelle, die Daten für Materialarten und entsprechende akustische Eigenschaften enthält.
  14. Verfahren nach einem der Ansprüche 10 bis 13, aufweisend:
    Erlangen eines Maßes der Wärmeleitfähigkeit der eingeschätzten Materialart und Bewirken, dass sich das Heizelement hin oder weg zu/von der wenigstens einen Wand bewegt, abhängig von der Wärmeleitfähigkeit der Materialart.
  15. Verfahren nach einem der Ansprüche 10 bis 14, aufweisend:
    Betreiben eines Motors, um das Heizelement in der Heizkammer zu bewegen.
EP18206818.9A 2018-11-16 2018-11-16 Ofen und verfahren zum betrieb Active EP3653936B1 (de)

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Application Number Priority Date Filing Date Title
EP18206818.9A EP3653936B1 (de) 2018-11-16 2018-11-16 Ofen und verfahren zum betrieb

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EP3653936A1 EP3653936A1 (de) 2020-05-20
EP3653936B1 true EP3653936B1 (de) 2021-05-19

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Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2721695B3 (fr) * 1994-06-28 1996-06-07 Whirlpool Europ Four de cuisson comportant un élément chauffant électrique, amovible aux fins d'un nettoyage.
JP3649591B2 (ja) * 1998-06-16 2005-05-18 シャープ株式会社 調理器
DE19828641A1 (de) * 1998-06-26 1999-12-30 Bsh Bosch Siemens Hausgeraete Backofen mit bewegbarem Heizelement
US6723962B1 (en) * 2002-07-02 2004-04-20 Sun Cupid Industries Ltd. Double deck toaster oven

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