EP2639514A1 - Cooking device - Google Patents
Cooking device Download PDFInfo
- Publication number
- EP2639514A1 EP2639514A1 EP13157606.8A EP13157606A EP2639514A1 EP 2639514 A1 EP2639514 A1 EP 2639514A1 EP 13157606 A EP13157606 A EP 13157606A EP 2639514 A1 EP2639514 A1 EP 2639514A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- unit
- static
- thermally active
- cooking
- sensor
- 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
- 238000010411 cooking Methods 0.000 title claims abstract description 58
- 230000003068 static effect Effects 0.000 claims abstract description 64
- 238000013021 overheating Methods 0.000 claims abstract description 17
- 230000002265 prevention Effects 0.000 claims abstract description 14
- 238000005338 heat storage Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract 2
- 238000010521 absorption reaction Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 description 18
- 238000001816 cooling Methods 0.000 description 7
- 239000012071 phase Substances 0.000 description 7
- 239000012188 paraffin wax Substances 0.000 description 6
- 229910052782 aluminium Inorganic materials 0.000 description 5
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 5
- 238000011156 evaluation Methods 0.000 description 5
- 238000005259 measurement Methods 0.000 description 4
- 230000003287 optical effect Effects 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000006698 induction Effects 0.000 description 3
- 238000002844 melting Methods 0.000 description 3
- 230000008018 melting Effects 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000005670 electromagnetic radiation Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000011159 matrix material Substances 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
Images
Classifications
-
- 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
- F24C15/00—Details
- F24C15/10—Tops, e.g. hot plates; Rings
- F24C15/102—Tops, e.g. hot plates; Rings electrically heated
Definitions
- the invention is based on a cooking device device according to the preamble of claim 1.
- the object of the invention is, in particular, to provide a generic device with improved properties in terms of noise development prevention.
- the object is achieved by the features of claim 1, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.
- the invention is based on a cooking device device, in particular a cooktop device, with at least one sensor unit which is provided to determine at least one cooking parameter, and with at least one overheating prevention unit, which is provided to prevent overheating of the at least one sensor unit.
- the overheating prevention unit has at least one static, thermally active unit.
- a "cooking device device” should be understood in particular to mean a device which is intended to be used in a cooking device, for example an oven, a microwave and / or a hob, in particular a hob with a variable cooking zone, for example a matrix hob.
- a “sensor unit” should in particular be understood to mean a unit which has at least one sensor element.
- a “sensor element” is to be understood as meaning, in particular, an element which is intended to be a physical variable, in particular a temperature, an advantageous electromagnetic radiation, a mass, a length, an electrical voltage and / or an electric current other, preferably electrical, physical quantity, in particular a voltage, a current and / or a digital signal to convert.
- the sensor unit has at least one housing unit which is provided for delimiting at least sensor elements of the sensor unit from at least one other unit, in particular a heating unit and / or a power electronics unit, the cooking appliance device and / or a cooking appliance in which the cooking appliance device is installed.
- the housing unit is at least substantially, in particular at least 50%, advantageously at least 80%, preferably at least 95%, of at least one metal, in particular at least aluminum, formed to a low susceptibility of the sensor unit by the influence of electromagnetic radiation, in particular heat radiation and / or radio waves to achieve and / or to achieve a high thermal conductivity of the housing unit.
- the sensor unit has at least one evaluation electronics, in particular an amplifier unit, which is provided to condition measured values of the sensor element, in particular to amplify a signal of the sensor element.
- a "cooking size" is to be understood in particular a characteristic that characterizes a cooking operation.
- the cooking size represents a parameter of the cooking appliance device, a parameter of a food container, in particular a pot, a pan, a baking tray and / or a brewer, and / or a characteristic of food to be cooked in the food container.
- a "superheat avoidance unit” is intended in particular to mean a Unit, which is intended to increase a temperature of the sensor unit above a certain limit, in particular at most 100 ° C, advantageously at most 80 ° C, preferably at most 60 ° C, at least for a certain time, in particular for at least 20 minutes, advantageously for at least 40 minutes, preferably for at least 60 minutes.
- a static, thermally active unit is meant in particular a unit having at least one static, thermally active element.
- a "static, thermally active element” is to be understood in particular an element which is intended to transport and / or absorb heat, wherein in the heat transfer and / or the heat absorption a flow of matter is dispensable, in particular one of a pure convection deviating matter flow is dispensed with.
- the static, thermally active element is provided, with a heating of 20 ° C up to a temperature 5 K above the threshold amount of heat of at least 50 J, in particular at least 100 J, advantageously at least 150 J, preferably at least 200 J per gramme weight and / or per second to absorb an amount of heat of at least 0.5 J, advantageously at least 1 J, preferably at least 2 J, in particular against an existing temperature gradient.
- a low volume can be achieved because it can be dispensed with the use of an additional fan.
- the static, thermally active unit has at least two different types of static, thermally active elements.
- efficient overheating prevention can be achieved.
- the static, thermally active unit has at least one static, thermally active element designed as a Peltier element.
- a "Peltier element” is to be understood in particular as meaning a static, thermally active unit which has at least two active zones, in particular surfaces, and which is intended to transport heat from one of the active zones to another of the active zones by means of an electric current flow , Preferably, a heat transport direction is dependent on a direction of flow.
- a powerful and / or efficient cooling can be achieved.
- cooling can also be achieved if a temperature of the sensor unit is lower than a temperature of a coupled heat absorption unit.
- the static, thermally active unit has at least one static, thermally active element designed as a latent heat storage element.
- a "latent heat storage element” is to be understood in particular to be an element which has at least one phase boundary, in particular between a solid phase and a liquid and / or dissolved phase, at normal pressure at at least one limit temperature and is intended, when the phase boundary is exceeded or the limit temperature of a temperature below the limit temperature to a temperature above the limit temperature, heat, in the form of phase change heat, in particular resulting from a melting and / or enthalpy of solution, and / or upon cooling from a temperature above the threshold temperature to a temperature below Limit temperature heat, in the form of phase change heat to give.
- the limit temperature is at least 30 ° C, preferably at least 40 ° C, preferably at least 50 ° C.
- the limit temperature is at most 100 ° C, preferably at most 80 ° C, preferably at most 70 ° C.
- the latent heat storage element is provided to absorb a heat quantity of at least 1 Wh, in particular at least 2 Wh, advantageously at least 3 Wh, preferably at least 4 Wh, when passing over the phase boundary.
- the latent heat storage element has at least one housing which is filled with latent heat storage material.
- this housing is at least largely, in particular at least 50%, advantageously at least 80%, preferably at least 95%, of at least one metal, in particular aluminum, formed. In particular, it is possible to achieve a constant temperature over a prolonged period, which can lead to increased measuring precision.
- the overheating prevention unit has at least one heat absorption unit which is thermally connected to the sensor unit via the static, thermally active unit.
- the heat receiving unit is partially formed integrally with the static, thermally active unit.
- a "heat absorption unit" is to be understood in particular a unit which is intended to serve as a heat sink.
- the heat absorption unit has at least one heat sink and / or at least one fan.
- the heat sink is designed as a heat sink of the power electronics, as a shielding unit of a heating element, in particular an induction heating element, and / or as a housing part of a Garellavorraum having cooking appliance.
- the heat absorption unit has at least one heat pipe, which is intended to produce good thermal contact between the heat sink and the static, thermally active unit.
- the fan is intended to guide at least one fluid, in particular air, along the heat sink, wherein the fluid is intended to absorb and remove heat from the heat sink.
- a continuous cooling can be achieved.
- a reduction of required parts can be achieved.
- costs can be saved.
- the sensor unit is provided to determine at least one cooking temperature parameter.
- a cooking temperature parameter is to be understood in particular to mean a cooking parameter which is a temperature of a food item and / or a Gargut mattersers reflects.
- the sensor unit has at least one non-contact temperature sensor, in particular an infrared sensor.
- the sensor unit is provided to determine a weight of the food and / or Gargut toysnisses, measure a performance characteristic, in particular a current of a heating element, and / or to determine a size of the Gargut spanisses.
- the invention can be used advantageously, since here a temperature of the sensor can influence a measurement result particularly strong.
- the sensor unit has at least one temperature sensor which is provided to determine a temperature parameter of the sensor unit.
- the temperature sensor is designed as a thermistor.
- an improved measurement can be achieved.
- an influence of a temperature of the sensor unit on a measurement result, in particular mathematically, can be corrected.
- the cooking appliance device has at least one control unit which is provided to activate at least one static, thermally active element, in particular at least one Peltier element, as a function of values of the temperature characteristic.
- a "control unit” should in particular be understood to mean an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of a cooking appliance.
- the control unit preferably comprises a computing unit and, in particular in addition to the computing unit, a memory unit with a control and / or regulating program stored therein, which is intended to be executed by the computing unit.
- the control unit is designed as an integrated circuit.
- the control unit is provided to activate a static, thermally active element when a value of the temperature parameter exceeds a limit value.
- FIG. 1 shows a designed as an induction hob cooking device 10 with four designed as hob cooking device devices 12, 14, 16, 18.
- the cooking device 10 has four formed as induction heating elements heating elements 22, 24, 26, 28, which are arranged under a hob plate 20. On the hob plate 20 28 heating zones are specified by the heating elements 22, 24, 26, in which cooking vessels 30 or cooking utensils can be placed to a warming.
- FIG. 2 shows a section along the line II-II in FIG. 1 by the cooking appliance device 12, for example.
- the cooking appliance device 12 has a sensor unit 40.
- the sensor unit 40 is provided to determine a temperature of the cooking vessel 30.
- the sensor unit 40 has a sensor element 42 designed as an infrared sensor.
- the sensor unit 40 has an evaluation 44.
- the sensor unit 40 also has a temperature sensor 46, which is provided to determine a temperature of the sensor unit 40.
- the sensor element 42, the evaluation electronics 44 and the temperature sensor 46 are accommodated in a housing unit 48 of the sensor unit 40.
- the housing unit 48 is formed of aluminum.
- the housing unit 48 has a window 84, alternatively an opening, through which the sensor element 42 can perform measurements.
- the sensor element 42 is thermally coupled to the housing unit 48, for example via an electrically insulating thermal paste or the like.
- the sensor unit 40 of the cooking device device 12 is arranged in a cooking mode under the heating element 22. Wherein a field of view of the sensor element 42 through the heating element 22 through to the hob plate 20 in the infrared spectral range is optically clear.
- the cooktop panel 20 is at a location 21 at the infrared radiation of the Cooking vessel 30 is transmitted through the hob plate 20, specially treated, for example by laser bombardment, to improve a transmissivity and / or infrared insulating properties.
- an optical guide element 82 is arranged in order to avoid stray light influences on the sensor element 42.
- the optical guide element 82 is formed as a glass fiber, which connects the point 21 with the sensor unit 40. Alternatively, the optical guide element 82 can also be dispensed with if the sensor unit 40 is arranged in the free line of sight to the point 21.
- the heating element 22 has a shielding unit 23, which is provided to intercept generated by the heating element 22, alternating electromagnetic fields to prevent their influence on electronics of the cooking appliance 10.
- the shielding unit 23 is made of aluminum.
- the shielding unit 23 is formed as a sheet metal.
- the cooking appliance 10 has a power electronics unit 50, which is provided to supply the heating elements 22, 24, 26, 28 with energy.
- the power electronics unit 50 is cooled by a heat sink 52.
- the cooking device device 12 furthermore has an overheating prevention unit 60, which is provided to prevent overheating of the sensor unit 40.
- the overheat prevention unit 60 includes a static thermally active unit 62.
- the static, thermally active unit 62 has a first static, thermally active element 64 designed as a Peltier element. A first active zone of the first static thermally active element 64 is directly connected to the housing unit 48 of the sensor unit 40.
- the overheating preventing unit 60 further includes a heat receiving unit 70 thermally connected to the sensor unit 40 via the first static thermally active unit 62.
- the heat receiving unit 70 has a heat pipe 72.
- a first end of the heat pipe 72 is directly connected to a second active zone of the first static thermally active element 64.
- a second end of the heat pipe 72 is directly connected to the heat sink 52 of the power electronics unit 50.
- the heat sink 52 is part of the heat absorption unit 70.
- first active zone of the first static, thermally active element 64 is connected directly to the heat sink 52 and a heat pipe is arranged between the second active zone of the first static, thermally active element 64 and the sensor unit 40, or that both of the active zones are connected via a heat pipe to the sensor unit 40 and the heat sink 52, respectively.
- the cooking device device 12 has a control unit 80, which is provided to activate the first static, thermally active element 64 as a function of values of the temperature characteristic of the temperature sensor 46 of the sensor unit 40.
- the control unit 80 is further provided to control the power electronics unit 50.
- the control unit 80 is provided to activate the first static thermally active element 64 when a temperature of the sensor unit 40 exceeds a threshold temperature of 60 ° C. Heat is then removed from the housing unit 48 at the first active zone of the first static thermally active element 64 and delivered to the second active zone, from where it is conducted via the heat pipe 72 to the heat sink 52.
- control unit 80 is provided only for activation of the first static, thermally active element 64 and is integrated as an integrated circuit in the evaluation electronics 44 of the sensor unit 40.
- control unit 80 is provided to operate at a temperature below 55 ° C, the first static, thermally active element 64 in the reverse direction and to increase a temperature of the sensor unit 40 in order to achieve a temporally constant temperature as possible.
- the first static thermally active element 64 has a typical power factor of 1.5 and is designed to carry a heat flux of 5W.
- the heat pipe 72 is dispensed with and the heat sink 52 is not part of the heat absorption unit 70 (dashed in FIG FIG. 2 indicated).
- a first active zone of a first static thermally active element 64 ' is directly connected to the housing unit 48 of the sensor unit 40, and a second active zone of the first static thermally active element 64 is directly connected to the shielding unit 23, the shielding unit 23 being part the heat receiving unit 70 is.
- FIG. 3 a further embodiment of the invention is shown.
- the following descriptions are essentially limited to the differences between the embodiments, with respect to the same components, features and functions on the description of the embodiment of FIGS. 1 and 2 can be referenced.
- identically designated components in particular with regard to components with the same reference numerals, can in principle also to the drawings and / or the description of the embodiment of FIGS. 1 and 2 to get expelled.
- FIG. 2 shows an alternative embodiment of a cooking appliance device 12a.
- the cooking device device 12a has a sensor unit 40a and an overheating prevention unit 60a with a static, thermally active unit 62a.
- the static, thermally active unit 62a has two different types of static, thermally active elements 64a, 66a.
- the cooking device device 12a has a first static, thermally active element 64a designed as a Peltier element.
- the static, thermally active unit 62a has a second static, thermally active element 66a designed as a latent heat storage element.
- the second static thermally active element 66a is formed as a housing 68a filled with latent heat storage medium.
- the housing 68a is made of aluminum.
- paraffin As a latent heat storage medium paraffin is filled in the housing 68 a, which has a phase boundary, a melt transition, at 60 ° C.
- the paraffin has a specific heat of fusion of 200 J / g.
- 90 grams of the paraffin is poured hot into the housing 68a, leaving a cavity in the housing 68a upon cooling.
- paraffins for example, with melting temperatures between 45 ° C and 60 ° C, conceivable.
- a first active zone of the first static thermally active element 64a is directly connected to a housing unit 48a of the sensor unit 40a.
- a second active zone of the first static thermally active element 64a is directly connected to the housing 68a of the second static thermally active element 66a. Due to the high heat storage capacity, a temperature of the sensor unit 40a can be kept constant for one hour assuming heat transfer of the first static, thermally active element 64a of 5 W.
- the second static thermally active element 64a forms a heat receiving unit 70a. It is conceivable that cooling fins are arranged on uncovered outer walls of the housing 68a in order to give off heat.
- the first static, thermally active element 64a is dispensed with, wherein the housing unit 48a and the housing 68a are in direct contact. Paraffin with a melting temperature of 50 ° C is preferred here. In particular, an amount of paraffin can be reduced because heat input by electric power of the first static thermally active element 64a is eliminated. Likewise, a control of the first static, thermally active element 64a is omitted, and it is possible to dispense with a temperature sensor 46a of the sensor unit 40a.
- Cooking appliance casing 12 Garellavorides 70 Heat receiving unit 14 Garellavorides 72 heat pipe 16 Garellavorides 80 control unit 18 Garellavorides 82 optical guide element 20 Hotplate 84 window 21 Job 22 heating element 23 shielding 24 heating element 26 heating element 28 heating element 30 cooking pot 40 sensor unit 42 sensor element 44 evaluation 46 temperature sensor 48 housing unit 50 Power electronics unit 52 heatsink 60 Overheating prevention unit 62 static, thermally active unit 64 static, thermally active element 66 static, thermally active element
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Induction Heating Cooking Devices (AREA)
- Cookers (AREA)
Abstract
Description
Die Erfindung geht aus von einer Gargerätevorrichtung nach dem Oberbegriff des Anspruchs 1.The invention is based on a cooking device device according to the preamble of claim 1.
Es sind Kochfelder bekannt, die einen Temperatursensor zur Detektion einer Gargeschirrtemperatur aufweisen und die eine Kühleinheit für diesen Temperatursensor aufweisen.There are hobs are known which have a temperature sensor for detecting a Gargeschirrtemperatur and having a cooling unit for this temperature sensor.
Die Aufgabe der Erfindung besteht insbesondere darin, eine gattungsgemäße Vorrichtung mit verbesserten Eigenschaften hinsichtlich einer Geräuschentwicklungsvermeidung bereitzustellen. Die Aufgabe wird erfindungsgemäß durch die Merkmale des Patentanspruchs 1 gelöst, während vorteilhafte Ausgestaltungen und Weiterbildungen der Erfindung den Unteransprüchen entnommen werden können.The object of the invention is, in particular, to provide a generic device with improved properties in terms of noise development prevention. The object is achieved by the features of claim 1, while advantageous embodiments and modifications of the invention can be taken from the dependent claims.
Die Erfindung geht aus von einer Gargerätevorrichtung, insbesondere einer Kochfeldvorrichtung, mit zumindest einer Sensoreinheit, die dazu vorgesehen ist, zumindest eine Garkenngröße zu bestimmen, und mit zumindest einer Überhitzungsvermeidungseinheit, die dazu vorgesehen ist, eine Überhitzung der zumindest einen Sensoreinheit zu vermeiden.The invention is based on a cooking device device, in particular a cooktop device, with at least one sensor unit which is provided to determine at least one cooking parameter, and with at least one overheating prevention unit, which is provided to prevent overheating of the at least one sensor unit.
Es wird vorgeschlagen, dass die Überhitzungsvermeidungseinheit zumindest eine statische, thermisch aktive Einheit aufweist. Unter einer "Gargerätevorrichtung" soll insbesondere eine Vorrichtung verstanden werden, die dazu vorgesehen ist, in einem Gargerät, beispielsweise einem Backofen, einer Mikrowelle und/oder einem Kochfeld, insbesondere einem Kochfeld mit variabler Kochzone, beispielsweise einem Matrixkochfeld, Anwendung zu finden. Unter einer "Sensoreinheit" soll insbesondere eine Einheit verstanden werden, die zumindest ein Sensorelement aufweist. Unter einem "Sensorelement" soll insbesondere ein Element verstanden werden, das dazu vorgesehen ist, eine physikalische Größe, insbesondere eine Temperatur, eine, vorteilhaft elektromagnetische, Strahlung, eine Masse, eine Länge, eine elektrische Spannung und/oder einen elektrischen Strom, in eine andere, vorzugsweise elektrische, physikalische Größe, insbesondere eine Spannung, einen Strom und/oder ein digitales Signal, umzuwandeln. Insbesondere weist die Sensoreinheit zumindest eine Gehäuseeinheit auf, die dazu vorgesehen ist, zumindest Sensorelemente der Sensoreinheit gegen zumindest eine andere Einheit, insbesondere eine Heizeinheiten und/oder eine Leistungselektronikeinheit, der Gargerätevorrichtung und/oder eines Gargeräts, in dem die Gargerätevorrichtung verbaut ist, abzugrenzen. Vorzugsweise ist die Gehäuseeinheit zumindest im Wesentlichen, insbesondere zu mindestens 50 %, vorteilhaft zu mindestens 80 %, vorzugsweise zu mindestens 95 %, von zumindest einem Metall, insbesondere zumindest von Aluminium, gebildet, um eine niedrige Störanfälligkeit der Sensoreinheit durch Einfluss von elektromagnetischer Strahlung, insbesondere Wärmestrahlung und/oder Radiowellen, zu erreichen und/oder eine hohe Wärmeleitfähigkeit der Gehäuseeinheit zu erreichen. Insbesondere weist die Sensoreinheit zumindest eine Auswerteelektronik, insbesondere eine Verstärkereinheit, auf, die dazu vorgesehen ist, Messwerte des Sensorelements aufzubereiten, insbesondere ein Signal des Sensorelements zu verstärken. Unter einer "Garkenngröße" soll insbesondere eine Kenngröße verstanden werden, die einen Garbetrieb charakterisiert. Insbesondere stellt die Garkenngröße eine Kenngröße der Gargerätevorrichtung, eine Kenngröße eines Gargutbehälters, insbesondere eines Topfes, einer Pfanne, eines Backblechs und/oder eines Bräters, und/oder eine Kenngröße von in dem Gargutbehälter bevorratetem Gargut dar. Unter einer "Überhitzungsvermeidungseinheit" soll insbesondere eine Einheit verstanden werden, die dazu vorgesehen ist, einen Anstieg einer Temperatur der Sensoreinheit über einen bestimmten Grenzwert, der insbesondere maximal 100 °C, vorteilhaft maximal 80 °C, vorzugsweise maximal 60 °C, beträgt, zumindest für eine bestimmte Zeit, insbesondere für zumindest 20 min, vorteilhaft für zumindest 40 min, vorzugsweise für zumindest 60 min, zu vermeiden. Unter "einer statischen, thermisch aktiven Einheit" soll insbesondere eine Einheit mit zumindest einem statischen, thermisch aktiven Element verstanden werden. Unter einem "statischen, thermisch aktiven Element" soll insbesondere ein Element verstanden werden, das dazu vorgesehen ist, Wärme zu transportieren und/oder aufzunehmen, wobei bei dem Wärmetransport und/oder der Wärmeaufnahme ein Materiefluss verzichtbar ist, insbesondere auf einen von einer reinen Konvektion abweichenden Materiefluss verzichtet wird. Insbesondere ist das statische, thermisch aktive Element dazu vorgesehen, bei einer Erwärmung von 20 °C bis zu einer Temperatur 5 K über dem Grenzwert eine Wärmemenge von zumindest 50 J, insbesondere zumindest 100 J, vorteilhaft zumindest 150 J, vorzugsweise zumindest 200 J je Gramm Eigengewicht aufzunehmen und/oder je Sekunde eine Wärmemenge von zumindest 0,5 J, vorteilhaft zumindest 1 J, vorzugsweise zumindest 2 J, insbesondere gegen ein vorhandenes Temperaturgefälle zu transportieren. Es kann insbesondere eine geringe Lautstärke erreicht werden, da auf einen Einsatz eines zusätzlichen Lüfters verzichtet werden kann.It is proposed that the overheating prevention unit has at least one static, thermally active unit. A "cooking device device" should be understood in particular to mean a device which is intended to be used in a cooking device, for example an oven, a microwave and / or a hob, in particular a hob with a variable cooking zone, for example a matrix hob. A "sensor unit" should in particular be understood to mean a unit which has at least one sensor element. A "sensor element" is to be understood as meaning, in particular, an element which is intended to be a physical variable, in particular a temperature, an advantageous electromagnetic radiation, a mass, a length, an electrical voltage and / or an electric current other, preferably electrical, physical quantity, in particular a voltage, a current and / or a digital signal to convert. In particular, the sensor unit has at least one housing unit which is provided for delimiting at least sensor elements of the sensor unit from at least one other unit, in particular a heating unit and / or a power electronics unit, the cooking appliance device and / or a cooking appliance in which the cooking appliance device is installed. Preferably, the housing unit is at least substantially, in particular at least 50%, advantageously at least 80%, preferably at least 95%, of at least one metal, in particular at least aluminum, formed to a low susceptibility of the sensor unit by the influence of electromagnetic radiation, in particular heat radiation and / or radio waves to achieve and / or to achieve a high thermal conductivity of the housing unit. In particular, the sensor unit has at least one evaluation electronics, in particular an amplifier unit, which is provided to condition measured values of the sensor element, in particular to amplify a signal of the sensor element. A "cooking size" is to be understood in particular a characteristic that characterizes a cooking operation. In particular, the cooking size represents a parameter of the cooking appliance device, a parameter of a food container, in particular a pot, a pan, a baking tray and / or a brewer, and / or a characteristic of food to be cooked in the food container. A "superheat avoidance unit" is intended in particular to mean a Unit, which is intended to increase a temperature of the sensor unit above a certain limit, in particular at most 100 ° C, advantageously at most 80 ° C, preferably at most 60 ° C, at least for a certain time, in particular for at least 20 minutes, advantageously for at least 40 minutes, preferably for at least 60 minutes. By "a static, thermally active unit" is meant in particular a unit having at least one static, thermally active element. A "static, thermally active element" is to be understood in particular an element which is intended to transport and / or absorb heat, wherein in the heat transfer and / or the heat absorption a flow of matter is dispensable, in particular one of a pure convection deviating matter flow is dispensed with. In particular, the static, thermally active element is provided, with a heating of 20 ° C up to a temperature 5 K above the threshold amount of heat of at least 50 J, in particular at least 100 J, advantageously at least 150 J, preferably at least 200 J per gramme weight and / or per second to absorb an amount of heat of at least 0.5 J, advantageously at least 1 J, preferably at least 2 J, in particular against an existing temperature gradient. In particular, a low volume can be achieved because it can be dispensed with the use of an additional fan.
Weiterhin wird vorgeschlagen, dass die statische, thermisch aktive Einheit zumindest zwei unterschiedliche Arten von statischen, thermisch aktiven Elementen aufweist. Es kann insbesondere eine effiziente Überhitzungsvermeidung erreicht werden.Furthermore, it is proposed that the static, thermally active unit has at least two different types of static, thermally active elements. In particular, efficient overheating prevention can be achieved.
Ferner wird vorgeschlagen, dass die statische, thermisch aktive Einheit zumindest ein als Peltierelement ausgebildetes statisches, thermisch aktives Element aufweist. Unter einem "Peltierelement" soll insbesondere eine statische, thermisch aktive Einheit verstanden werden, die zumindest zwei aktive Zonen, insbesondere Oberflächen, aufweist und die dazu vorgesehen ist, durch einen elektrischen Stromfluss Wärme von einer der aktiven Zone zu einer anderen der aktiven Zonen zu transportieren. Vorzugsweise ist eine Wärmetransportrichtung von einer Stromrichtung abhängig. Es kann insbesondere eine leistungsfähige und/oder effiziente Kühlung erreicht werden. Insbesondere kann auch dann eine Kühlung erreicht werden, wenn eine Temperatur der Sensoreinheit kleiner ist, als eine Temperatur einer gekoppelten Wärmeaufnahmeeinheit.It is also proposed that the static, thermally active unit has at least one static, thermally active element designed as a Peltier element. A "Peltier element" is to be understood in particular as meaning a static, thermally active unit which has at least two active zones, in particular surfaces, and which is intended to transport heat from one of the active zones to another of the active zones by means of an electric current flow , Preferably, a heat transport direction is dependent on a direction of flow. In particular, a powerful and / or efficient cooling can be achieved. In particular, cooling can also be achieved if a temperature of the sensor unit is lower than a temperature of a coupled heat absorption unit.
Weiterhin wird vorgeschlagen, dass die statische, thermisch aktive Einheit zumindest ein als Latentwärmespeicherelement ausgebildetes, statisches, thermisch aktives Element aufweist. Unter einem "Latentwärmespeicherelement" soll insbesondere ein Element verstanden werden, das zumindest eine Phasengrenze, insbesondere zwischen einer festen Phase und einer flüssigen und/oder gelösten Phase, bei Normaldruck bei zumindest einer Grenztemperatur aufweist und dazu vorgesehen ist, bei einem Überschreiten der Phasengrenze bzw. der Grenztemperatur von einer Temperatur unter der Grenztemperatur zu einer Temperatur über der Grenztemperatur, Wärme, in Form von Phasenwechselwärme, insbesondere resultierend aus einer Schmelz- und/oder Lösungsenthalpie, aufzunehmen und/oder bei Abkühlung von einer Temperatur über der Grenztemperatur zu einer Temperatur unter der Grenztemperatur Wärme, in Form von Phasenwechselwärme, abzugeben. Insbesondere beträgt die Grenztemperatur zumindest 30 °C, vorteilhaft zumindest 40 °C, vorzugsweise zumindest 50 °C. Insbesondere beträgt die Grenztemperatur maximal 100 °C, vorteilhaft maximal 80 °C, vorzugsweise maximal 70 °C. Insbesondere ist das Latentwärmespeicherelement dazu vorgesehen, bei Übergang über die Phasengrenze eine Wärmemenge von zumindest 1 Wh, insbesondere zumindest 2 Wh, vorteilhaft zumindest 3 Wh, vorzugsweise zumindest 4 Wh, aufzunehmen. Vorzugsweise weist das Latentwärmespeicherelement zumindest ein Gehäuse auf, das mit Latentwärmespeichermaterial gefüllt ist. Vorteilhaft ist dieses Gehäuse zumindest großteils, insbesondere zu mindestens 50 %, vorteilhaft zu mindestens 80 %, vorzugsweise mindestens 95 %, aus zumindest einem Metall, insbesondere Aluminium, gebildet. Es kann insbesondere eine über längere Zeit konstante Temperatur erreicht werden, was zu einer erhöhten Messpräzision führen kann.Furthermore, it is proposed that the static, thermally active unit has at least one static, thermally active element designed as a latent heat storage element. A "latent heat storage element" is to be understood in particular to be an element which has at least one phase boundary, in particular between a solid phase and a liquid and / or dissolved phase, at normal pressure at at least one limit temperature and is intended, when the phase boundary is exceeded or the limit temperature of a temperature below the limit temperature to a temperature above the limit temperature, heat, in the form of phase change heat, in particular resulting from a melting and / or enthalpy of solution, and / or upon cooling from a temperature above the threshold temperature to a temperature below Limit temperature heat, in the form of phase change heat to give. In particular, the limit temperature is at least 30 ° C, preferably at least 40 ° C, preferably at least 50 ° C. In particular, the limit temperature is at most 100 ° C, preferably at most 80 ° C, preferably at most 70 ° C. In particular, the latent heat storage element is provided to absorb a heat quantity of at least 1 Wh, in particular at least 2 Wh, advantageously at least 3 Wh, preferably at least 4 Wh, when passing over the phase boundary. Preferably, the latent heat storage element has at least one housing which is filled with latent heat storage material. Advantageously, this housing is at least largely, in particular at least 50%, advantageously at least 80%, preferably at least 95%, of at least one metal, in particular aluminum, formed. In particular, it is possible to achieve a constant temperature over a prolonged period, which can lead to increased measuring precision.
Vorteilhaft wird vorgeschlagen, dass die Überhitzungsvermeidungseinheit zumindest eine Wärmeaufnahmeeinheit aufweist, die über die statische, thermisch aktive Einheit mit der Sensoreinheit thermisch verbunden ist. Insbesondere ist die Wärmeaufnahmeeinheit teilweise einstückig mit der statischen, thermisch aktiven Einheit ausgebildet. Unter einer "Wärmeaufnahmeeinheit" soll insbesondere eine Einheit verstanden werden, die dazu vorgesehen ist, als Wärmesenke zu dienen. Insbesondere weist die Wärmeaufnahmeeinheit zumindest einen Kühlkörper und/oder zumindest einen Lüfter auf. Insbesondere ist der Kühlkörper als Kühlkörper der Leistungselektronik, als Abschirmeinheit eines Heizelements, insbesondere eines Induktionsheizelements, und/oder als Gehäuseteil eines die Gargerätevorrichtung aufweisenden Gargeräts ausgebildet. Insbesondere weist die Wärmeaufnahmeeinheit zumindest ein Wärmerohr auf, das dazu vorgesehen ist, einen guten Wärmekontakt zwischen dem Kühlkörper und der statischen, thermisch aktiven Einheit herzustellen. Insbesondere ist der Lüfter dazu vorgesehen zumindest ein Fluid, insbesondere Luft, an dem Kühlkörper entlangzuführen, wobei das Fluid dazu vorgesehen ist, Wärme vom Kühlkörper aufzunehmen und abzutransportieren. Es kann insbesondere eine andauernde Kühlung erreicht werden. Insbesondere kann eine Verminderung benötigter Teile erreicht werden. Insbesondere können Kosten gespart werden.It is advantageously proposed that the overheating prevention unit has at least one heat absorption unit which is thermally connected to the sensor unit via the static, thermally active unit. In particular, the heat receiving unit is partially formed integrally with the static, thermally active unit. A "heat absorption unit" is to be understood in particular a unit which is intended to serve as a heat sink. In particular, the heat absorption unit has at least one heat sink and / or at least one fan. In particular, the heat sink is designed as a heat sink of the power electronics, as a shielding unit of a heating element, in particular an induction heating element, and / or as a housing part of a Gargerätevorrichtung having cooking appliance. In particular, the heat absorption unit has at least one heat pipe, which is intended to produce good thermal contact between the heat sink and the static, thermally active unit. In particular, the fan is intended to guide at least one fluid, in particular air, along the heat sink, wherein the fluid is intended to absorb and remove heat from the heat sink. In particular, a continuous cooling can be achieved. In particular, a reduction of required parts can be achieved. In particular, costs can be saved.
Weiterhin wird vorgeschlagen, dass die Sensoreinheit dazu vorgesehen ist, zumindest eine Gartemperaturkenngröße zu bestimmen. Unter einer Gartemperaturkenngröße soll insbesondere eine Garkenngröße verstanden werden, die eine Temperatur eines Garguts und/oder eines Gargutbehälters wiederspiegelt. Insbesondere weist die Sensoreinheit zumindest einen berührungslosen Temperatursensor, insbesondere einen Infrarotsensor, auf. Alternativ und/oder zusätzlich ist es denkbar, dass die Sensoreinheit dazu vorgesehen ist, ein Gewicht des Garguts und/oder des Gargutbehältnisses zu bestimmen, eine Leistungskenngröße, insbesondere einen Strom eines Heizelements, zu messen und/oder eine Größe des Gargutbehältnisses zu bestimmen. Bei einer Bestimmung der Temperatur mit einem Infrarotsensor ist die Erfindung vorteilhaft einsetzbar, da hier eine Temperatur des Sensors ein Messergebnis besonders stark beeinflussen kann.Furthermore, it is proposed that the sensor unit is provided to determine at least one cooking temperature parameter. A cooking temperature parameter is to be understood in particular to mean a cooking parameter which is a temperature of a food item and / or a Gargutbehälters reflects. In particular, the sensor unit has at least one non-contact temperature sensor, in particular an infrared sensor. Alternatively and / or additionally, it is conceivable that the sensor unit is provided to determine a weight of the food and / or Gargutbehältnisses, measure a performance characteristic, in particular a current of a heating element, and / or to determine a size of the Gargutbehältnisses. In a determination of the temperature with an infrared sensor, the invention can be used advantageously, since here a temperature of the sensor can influence a measurement result particularly strong.
Ferner wird vorgeschlagen, dass die Sensoreinheit zumindest einen Temperatursensor aufweist, der dazu vorgesehen ist, eine Temperaturkenngröße der Sensoreinheit zu bestimmen. Insbesondere ist der Temperatursensor als Heißleiter ausgebildet. Es kann insbesondere eine verbesserte Messung erreicht werden. Insbesondere kann ein Einfluss einer Temperatur der Sensoreinheit auf ein Messergebnis, insbesondere rechnerisch, korrigiert werden.It is also proposed that the sensor unit has at least one temperature sensor which is provided to determine a temperature parameter of the sensor unit. In particular, the temperature sensor is designed as a thermistor. In particular, an improved measurement can be achieved. In particular, an influence of a temperature of the sensor unit on a measurement result, in particular mathematically, can be corrected.
Vorteilhaft wird vorgeschlagen, dass die Gargerätevorrichtung zumindest eine Steuereinheit aufweist, die dazu vorgesehen ist, zumindest ein statisches, thermisch aktives Element, insbesondere zumindest ein Peltierelement, in Abhängigkeit von Werten der Temperaturkenngröße zu aktivieren. Unter einer "Steuereinheit" soll insbesondere eine elektronische Einheit verstanden werden, die vorzugsweise in einer Steuer- und/oder Regeleinheit eines Gargeräts zumindest teilweise integriert ist. Vorzugsweise umfasst die Steuereinheit eine Recheneinheit und insbesondere zusätzlich zur Recheneinheit eine Speichereinheit mit einem darin gespeicherten Steuer- und/oder Regelprogramm, das dazu vorgesehen ist, von der Recheneinheit ausgeführt zu werden. Insbesondere ist die Steuereinheit als integrierter Schaltkreis ausgebildet. Insbesondere ist die Steuereinheit dazu vorgesehen, ein statisches, thermisch aktives Element zu aktivieren, wenn ein Wert der Temperaturkenngröße einen Grenzwert überschreitet.Advantageously, it is proposed that the cooking appliance device has at least one control unit which is provided to activate at least one static, thermally active element, in particular at least one Peltier element, as a function of values of the temperature characteristic. A "control unit" should in particular be understood to mean an electronic unit which is preferably at least partially integrated in a control and / or regulating unit of a cooking appliance. The control unit preferably comprises a computing unit and, in particular in addition to the computing unit, a memory unit with a control and / or regulating program stored therein, which is intended to be executed by the computing unit. In particular, the control unit is designed as an integrated circuit. In particular, the control unit is provided to activate a static, thermally active element when a value of the temperature parameter exceeds a limit value.
Weitere Vorteile ergeben sich aus der folgenden Zeichnungsbeschreibung. In der Zeichnung sind Ausführungsbeispiele der Erfindung dargestellt. Die Zeichnung, die Beschreibung und die Ansprüche enthalten zahlreiche Merkmale in Kombination. Der Fachmann wird die Merkmale zweckmäßigerweise auch einzeln betrachten und zu sinnvollen weiteren Kombinationen zusammenfassen.Further advantages emerge from the following description of the drawing. In the drawings, embodiments of the invention are shown. The drawing, the description and the claims contain numerous features in combination. The person skilled in the art will expediently also consider the features individually and combine them into meaningful further combinations.
Es zeigen:
- Fig. 1
- ein erfindungsgemäßes Kochfeld in einer schematischen Ansicht von oben,
- Fig. 2
- eine erste erfindungsgemäße Gargerätevorrichtung in einer schematischen Schnittdarstellung und
- Fig. 3
- eine zweite erfindungsgemäße Gargerätevorrichtung in einer schematischen Schnittdarstellung.
- Fig. 1
- an inventive hob in a schematic view from above,
- Fig. 2
- a first Gargerätevorrichtung invention in a schematic sectional view and
- Fig. 3
- a second cooking appliance device according to the invention in a schematic sectional view.
Die Sensoreinheit 40 der Gargerätevorrichtung 12 ist in einem Garbetriebszustand unter dem Heizelement 22 angeordnet. Wobei ein Blickfeld des Sensorelements 42 durch das Heizelement 22 hindurch bis zur Kochfeldplatte 20 im infraroten Spektralbereich optisch frei ist. Die Kochfeldplatte 20, ist an einer Stelle 21, an der infrarote Strahlung des Gargefäßes 30 durch die Kochfeldplatte 20 transmittiert wird, speziell, beispielsweise durch Laserbeschuss, behandelt, um eine Transmissivität und/oder Infrarotleiteigenschaften zu verbessern. Zwischen dem Sensorelement 42 und der Kochfeldplatte 20 ist ein optisches Leitelement 82 angeordnet, um Streulichteinflüsse auf das Sensorelement 42 zu vermeiden. Das optische Leitelement 82 ist als Glasfaser ausgebildet, die die Stelle 21 mit der Sensoreinheit 40 verbindet. Alternativ kann auf das optische Leitelement 82 auch verzichtet werden, wenn die Sensoreinheit 40 in freier Sichtstrecke zur Stelle 21 angeordnet ist.The
Das Heizelement 22 weist eine Abschirmeinheit 23 auf, die dazu vorgesehen ist, von dem Heizelement 22 erzeugte, elektromagnetische Wechselfelder abzufangen, um einen Einfluss dieser auf Elektronik des Gargeräts 10 zu vermeiden. Die Abschirmeinheit 23 ist aus Aluminium gefertigt. Die Abschirmeinheit 23 ist als Blech ausgebildet. Weiterhin weist das Gargerät 10 eine Leistungselektronikeinheit 50 auf, die dazu vorgesehen ist, die Heizelemente 22, 24, 26, 28 mit Energie zu versorgen. Die Leistungselektronikeinheit 50 wird durch einen Kühlkörper 52 gekühlt.The
Die Gargerätevorrichtung 12 weist weiterhin eine Überhitzungsvermeidungseinheit 60 auf, die dazu vorgesehen ist, eine Überhitzung der Sensoreinheit 40 zu vermeiden. Die Überhitzungsvermeidungseinheit 60 weist eine statische, thermisch aktive Einheit 62 auf. Die statische, thermisch aktive Einheit 62 weist ein als Peltierelement ausgebildetes, erstes statisches, thermisch aktives Element 64 auf. Eine erste aktive Zone des ersten statischen, thermisch aktiven Elements 64 ist direkt mit der Gehäuseeinheit 48 der Sensoreinheit 40 verbunden.The
Die Überhitzungsvermeidungseinheit 60 weist weiterhin eine Wärmeaufnahmeeinheit 70 auf, die über die erste statische, thermisch aktive Einheit 62 mit der Sensoreinheit 40 thermisch verbunden ist. Die Wärmeaufnahmeeinheit 70 weist ein Wärmerohr 72 auf. Ein erstes Ende des Wärmerohrs 72 ist direkt mit einer zweiten aktiven Zone des ersten statischen, thermisch aktiven Elements 64 verbunden. Ein zweites Ende des Wärmerohrs 72 ist direkt mit dem Kühlkörper 52 der Leistungselektronikeinheit 50 verbunden. Der Kühlkörper 52 ist Teil der Wärmeaufnahmeeinheit 70.The
Alternativ ist es denkbar, dass die erste aktive Zone des ersten statischen, thermisch aktiven Elements 64 direkt mit dem Kühlkörper 52 verbunden ist und ein Wärmerohr zwischen der zweiten aktiven Zone des ersten statischen, thermisch aktiven Elements 64 und der Sensoreinheit 40 angeordnet ist, oder dass beide der aktiven Zonen jeweils über ein Wärmerohr mit der Sensoreinheit 40 bzw. dem Kühlkörper 52 verbunden sind.Alternatively, it is conceivable that the first active zone of the first static, thermally
Die Gargerätevorrichtung 12 weist eine Steuereinheit 80 auf, die dazu vorgesehen ist, das erste statische, thermisch aktive Element 64 in Abhängigkeit von Werten der Temperaturkenngröße des Temperatursensors 46 der Sensoreinheit 40 zu aktivieren. Die Steuereinheit 80 ist weiterhin dazu vorgesehen, die Leistungselektronikeinheit 50 zu steuern. Die Steuereinheit 80 ist dazu vorgesehen, das erste statische, thermisch aktive Element 64 zu aktivieren, wenn eine Temperatur der Sensoreinheit 40 eine Grenztemperatur von 60 °C übersteigt. Wärme wird dann von der Gehäuseeinheit 48 an der ersten aktiven Zone des ersten statischen, thermisch aktiven Elements 64 abgenommen und an der zweiten aktiven Zone abgegeben, von wo sie über das Wärmerohr 72 zum Kühlkörper 52 geleitet wird.The
Alternativ ist es denkbar, dass die Steuereinheit 80 lediglich zur Aktivierung des ersten statischen, thermisch aktiven Elements 64 vorgesehen ist und als integrierter Schaltkreis in die Auswerteelektronik 44 der Sensoreinheit 40 integriert ist.Alternatively, it is conceivable that the
Weiterhin ist denkbar, dass die Steuereinheit 80 dazu vorgesehen ist, bei einer Temperatur unter 55 °C das erste statische, thermisch aktive Element 64 in umgekehrter Richtung zu betreiben und eine Temperatur der Sensoreinheit 40 zu erhöhen, um eine zeitlich möglichst konstante Temperatur zu erreichen. Das erste statische, thermisch aktive Element 64 weist einen typischen Leistungsfaktor von 1,5 auf und ist dazu ausgelegt, einen Wärmestrom von 5W zu transportieren.Furthermore, it is conceivable that the
In einer alternativen Ausgestaltung ist es denkbar, dass auf das Wärmerohr 72 verzichtet wird und der Kühlkörper 52 nicht Teil der Wärmeaufnahmeeinheit 70 ist (gestrichelt in
In der
Eine erste aktive Zone des ersten statischen, thermisch aktiven Elements 64a ist direkt mit einer Gehäuseeinheit 48a der Sensoreinheit 40a verbunden. Eine zweite aktive Zone des ersten statischen, thermisch aktiven Elements 64a ist direkt mit dem Gehäuse 68a des zweiten statischen, thermisch aktiven Elements 66a verbunden. Durch die hohe Wärmespeicherkapazität kann bei einem angenommenen Wärmetransport des ersten statischen, thermisch aktiven Elements 64a von 5 W eine Temperatur der Sensoreinheit 40a über eine Stunde konstant gehalten werden.A first active zone of the first static thermally
Das zweite statische, thermisch aktive Element 64a bildet eine Wärmeaufnahmeeinheit 70a. Es ist denkbar, dass an unbedeckten Außenwandungen des Gehäuses 68a Kühlfinnen angeordnet sind, um Wärme abzugeben.The second static thermally
Alternativ ist es denkbar, dass in einer weiteren Ausgestaltung auf das erste statische, thermisch aktive Element 64a verzichtet wird, wobei die Gehäuseeinheit 48a und das Gehäuse 68a in direktem Kontakt stehen. Hierbei ist bevorzugt Paraffin mit einer Schmelztemperatur von 50 °C einzusetzen. Insbesondere kann eine Menge an Paraffin reduziert werden, da ein Wärmeeintrag durch elektrische Leistung des ersten statischen, thermisch aktiven Elements 64a entfällt. Ebenso entfällt eine Steuerung des ersten statischen, thermisch aktiven Elements 64a, und es kann auf einen Temperatursensor 46a der Sensoreinheit 40a verzichtet werden.Alternatively, it is conceivable that in a further embodiment, the first static, thermally
Claims (10)
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EP3623705A1 (en) * | 2018-09-11 | 2020-03-18 | Convotherm Elektrogeräte GmbH | Cooking device |
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