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EP2445311B1 - Combination cooking device - Google Patents

Combination cooking device Download PDF

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Publication number
EP2445311B1
EP2445311B1 EP11010244.9A EP11010244A EP2445311B1 EP 2445311 B1 EP2445311 B1 EP 2445311B1 EP 11010244 A EP11010244 A EP 11010244A EP 2445311 B1 EP2445311 B1 EP 2445311B1
Authority
EP
European Patent Office
Prior art keywords
steam
cooking
cooking chamber
sensor
microwave generator
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.)
Active
Application number
EP11010244.9A
Other languages
German (de)
French (fr)
Other versions
EP2445311A3 (en
EP2445311A2 (en
Inventor
Ulrich Frey
Katrin Alder
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.)
V-Zug AG
Original Assignee
V-Zug AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by V-Zug AG filed Critical V-Zug AG
Priority to DK11010244.9T priority Critical patent/DK2445311T3/en
Priority to PL11010244T priority patent/PL2445311T3/en
Priority to SI201131264T priority patent/SI2445311T1/en
Priority to EP11010244.9A priority patent/EP2445311B1/en
Publication of EP2445311A2 publication Critical patent/EP2445311A2/en
Publication of EP2445311A3 publication Critical patent/EP2445311A3/en
Priority to AU2012268875A priority patent/AU2012268875B2/en
Application granted granted Critical
Publication of EP2445311B1 publication Critical patent/EP2445311B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGESĀ ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2007—Removing cooking fumes from oven cavities
    • 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
    • H05B6/64—Heating using microwaves
    • H05B6/647—Aspects related to microwave heating combined with other heating techniques
    • H05B6/6473—Aspects related to microwave heating combined with other heating techniques combined with convection heating
    • H05B6/6479—Aspects related to microwave heating combined with other heating techniques combined with convection heating using steam

Definitions

  • the invention relates to a cooking appliance for cooking food and a method for operating a cooking appliance.
  • the EP 2 322 859 A1 shows a cooking appliance with an air outlet from the oven, which is to be improved over known flap mechanisms.
  • the cooking appliance can be heated with microwave, hot air, steam or a combination.
  • a humidity sensor may be arranged in the air outlet.
  • the EP 2 083 223 A1 shows a cooking appliance with a steam generator, a hot air generator, a microwave generator and a bottom heat.
  • a cooking chamber of the cooking appliance is vented via an adjustable flap.
  • a humidity sensor can be arranged in the air outlet. In steam mode, the air outlet is closed to prevent steam from condensing on the humidity sensor.
  • the JP 2006 284013 A shows a cooking appliance with a steam generator and a hot air generator and an air outlet from a cooking chamber of the cooking appliance.
  • the object of the invention is to provide a cooking process and a cooking appliance, which further develop the steam cooking operation presented, so that the cooking time is reduced and / or the cooking result is improved.
  • the cooking appliance has a cooking chamber for receiving a food item.
  • Cooking in the context of this invention is intended to include all types of heating of the food, ie heating, heating, as well as the thawing of food, food, liquids, etc ..
  • the cooking chamber is typically a one-sided open hollow body, in the context of ovens also muffle called, whose open side can be closed with a door is.
  • a steam generator is provided, which allows a supply of steam, in particular steam, into the cooking chamber.
  • external steam generators are included, which generate steam outside the cooking chamber, which steam is then introduced via a supply line into the cooking chamber.
  • the claimed steam generator should also include internal steam generators, in which the steam within the cooking chamber, for example by heating water, is generated.
  • the cooking appliance has an opening in the cooking chamber, which allows the escape of steam from the cooking chamber.
  • This opening is therefore to be understood in particular as an opening provided in addition to the door opening, which allows an escape of steam even when the door is closed.
  • Such an opening may for example have an approximately coin-sized cross-section.
  • a microwave generator for heating cooking food received in the cooking chamber.
  • the present cooking device is a so-called combination device.
  • a controller is provided, preferably an electronic controller for the operation of the cooking appliance.
  • this controller receives the signal from a sensor that measures a parameter of steam exiting the orifice.
  • This parameter may be the temperature of the exiting vapor in the event that the sensor is designed as a temperature sensor.
  • This parameter may be the flow of the exiting vapor in the event that the sensor is designed as a flow sensor.
  • This parameter may be the pressure of the exiting vapor in the event that the sensor is designed as a pressure sensor.
  • This parameter may be the moisture of the exiting vapor in the event that the sensor is designed as a humidity sensor.
  • the sensor may be a combined sensor of two or more of the preceding individual sensors and thus support its measurement result on two or more different physical parameters.
  • the senor is arranged at the opening itself or in an extension of the opening, also called mouth, which extension connects the cooking chamber with an outside space outside the cooking chamber.
  • the sensor can be arranged on an inner wall or on an outer wall of the extension for measuring the parameter.
  • the sensor can also be arranged, for example, in the cooking chamber itself near the opening. There, too, he can measure a parameter of steam exiting through the aperture.
  • the sensor may be arranged, for example, within a radius of at most 5 cm around the opening.
  • a cooking device for cooking food to a cooking chamber for receiving the food and a steam generator for supplying steam into the cooking chamber.
  • a sensor is now provided for measuring a parameter of steam in the cooking chamber.
  • a microwave generator is provided for heating the cooking product received in the cooking chamber.
  • a controller controls the microwave generator depending on the parameter measured by the sensor.
  • a direct measure of the vapor saturation in the cooking chamber is added. This can be done, in particular, by a moisture sensor arranged in the cooking chamber, which receives, for example, a relative humidity in the cooking chamber. An opening in the cooking chamber for steam outlet may preferably still be present.
  • the microwave function as a function of the steam exit signal shortens the cooking time; switching off the microwave function as a function of the steam outlet signal prevents cooking of the food.
  • the sensor will indirectly indicate the degree of steam in the cooking chamber, as the more steam is in the cooking chamber, the more steam will escape through the orifice.
  • hardly Steam out through the opening when only a little steam in the cooking chamber or only a little steam was supplied to the cooking chamber.
  • the quantitative detection of the exiting vapor may depend on the pressure conditions that prevail at the outlet of the opening and other factors that determine the internal pressure in the cooking chamber.
  • the cooking process and the cooking result can be improved: For example, in a first mode of operation with a microwave addition can be waited until at least a certain steam level is reached in the cooking chamber, assuming that the steam primarily acts as a transfer medium for the microwave to the sensor so that the microwave generator can be operated with better measurability with the prior addition of steam. A better energy intake by the food may be the result.
  • the power distribution can be improved and local drying of the food can be prevented.
  • cooking can be started with a pure steam cooking operation. If, for example, the sensor, which is designed here as a temperature sensor, indicates a certain temperature of the exiting vapor, which temperature exceeds a first threshold value, the microwave generator is switched on when this first threshold value is exceeded.
  • a second exemplary mode of cooking of the food is achieved primarily by steaming.
  • the addition of microwave is only intended to accelerate steam cooking by adding the microwave function, either from the start of steam cooking, or when a certain cooking level has already been achieved and, accordingly, the temperature at the sensor exceeds a second threshold.
  • the microwave addition serve for a time reduction of cooking.
  • a microwave addition for the cooking result is advantageous because the food to be cooked by the microwave addition is heated in particular in its interior, whereas the steam cooking acts on the food from the outside.
  • the microwave in the second mode of operation for example, remain switched on only for a short period of time, possibly with maximum power.
  • the invention thus combines the steam cooking and the microwave cooking advantageously by the control of the microwave generator via a size representing the steam outlet from the cooking chamber. It has been found that this way the food can be heated faster and / or warmer, and that the food does not dry out too quickly. The residual water surplus can also be reduced by the proposed methods.
  • the steam cooking can be done in combination with the addition of hot air. All the above operating modes can also be used for regeneration.
  • the proposed operation of the cooking appliance can preferably be triggered by the selection of a specific cooking program via a selector switch.
  • Such an election program may explicitly refer to combined steam and microwave cooking.
  • the proposed operation may always be performed when one of the cooking programs "steam cookingā€ or "microwave cookingā€ is selected by the user.
  • Such operation may also be activated by the user during a conventional cooking program, for example, by the operation of an option key.
  • the proposed operation can also be activated automatically if, independently of the cooking program, either the steam generator or the microwave generator is activated.
  • the proposed operation can be activated even if the microwave generator and the steam generator are activated simultaneously.
  • a method for operating a cooking appliance for Cooking food feeding steam generated by a steam generator into a cooking space, measuring a parameter of steam exiting through an opening from the cooking space, and controlling a microwave generator depending on the measured parameter.
  • a method of operating a cooking appliance for cooking food comprises supplying steam into a cooking chamber, measuring a parameter of steam in the cooking chamber, and controlling a microwave generator depending on the measured parameter.
  • a parameter of steam in the cooking chamber preferably the moisture in the oven is measured.
  • the cooking appliance according to Fig. 1 comprises a cooking chamber 1, which is bounded by walls 2 and a door 3.
  • the cooking space may for example comprise 50 liters and more, for example, 56 liters.
  • the cooking appliance shown can be operated at least both as a steam cooker, as a microwave oven and as a combined Dampfgar- / microwave oven.
  • the cooking appliance includes a schematically drawn and separated from the cooking chamber 1 steam generator 4, the steam is supplied to the cooking chamber 1 via a supply line.
  • a microwave generator with the reference numeral 31 is arranged schematically in the ceiling of the cooking chamber 1 and may for example provide a maximum power of 700 watts.
  • the cooking appliance can optionally also be operated as an oven, for which, in an advantageous development, it contains a conventional resistive heater with top heat 5a and bottom heat 5b.
  • the cooking appliance may also be equipped with hot air or with a grill radiator.
  • a fan 6 is arranged as a fan, for example a cross-flow fan.
  • the fan 6 conveys air from a suction area 7 in a pressure chamber 8. From the pressure chamber 8, the conveyed air passes through a front outlet opening 9 of the device in the environment.
  • the pressure chamber 8 is bounded above by an inclined cover plate 10 and down through an inclined bottom plate 11, such that the pressure chamber 8 preferably tapers towards the outlet opening 9. Laterally, the pressure chamber is closed by side walls (not shown).
  • the cover plate 10 and the bottom plate 11 may, for example, but also be guided approximately parallel to each other. Other design variants are conceivable.
  • the cooking appliance has a device for measuring a steam outlet from the Cooking chamber 1.
  • This device comprises the opening 14, which serves as a measuring opening and leads from the cooking chamber 1 into the interior 15 of a protective housing 16.
  • the protective housing 16 is arranged in the pressure chamber 8 and communicates with this via a connection opening 17.
  • the connection opening 17 is located on the side facing away from the fan 6 of the protective housing 16.
  • a temperature sensor 18 for example in Formed an NTC resistor, which measures a temperature Tx.
  • the opening 14 is preferably always open.
  • the fan 6 is preferably permanently in operation. It sucks in air through openings in the rear wall and in the side walls of the cooking appliance from the environment. This air passes through the suction area 7, is blown into the pressure chamber 8 and leaves it through the outlet opening 9. Since the pressure chamber 8 tapers towards the outlet opening 9, a slight overpressure arises in the pressure space 8, ie. a pressure higher than the ambient pressure while the pressure in the suction area 7 is lower. This must prevail in the cooking chamber 1 a certain overpressure, so that a temperature increase can be detected at the temperature sensor 18, which can close to a gas / steam outlet through the opening 14. Another task of the fan 6 is to remove the air, which has warmed on the outside of the cooking chamber 1, to the outside for cooling the cooking appliance.
  • a controller 24 is provided, which among other things monitors the temperature signal output by the temperature sensor 18.
  • the steam generator 4 is basically controlled as follows: If a cooking operation is set by the user on an operating unit, for example in the form of a selector switch, which at least includes steaming, the steam generator 4 is switched on and the generated steam supplied to the cooking chamber 1. Due to the above, the escape of the steam from the cooking chamber 1 is difficult due to the pressure conditions generated by the fan 6 at the opening 14. Insofar, above a vapor pressure in the cooking chamber 1 higher than the ambient pressure steam escape through the opening 14, which then steam through a temperature increase detected at the temperature sensor 18 and can be recorded quantitatively.
  • the microwave generator 31 is switched on. It is assumed that from the prevalence of certain steam conditions in the cooking chamber 1 represented by the first threshold T1, a microwave addition leads faster to the desired cooking result and supports the Dampfgar mixes.
  • the steam generator 4 energy can be supplied when the temperature Tx at the temperature sensor 18 falls below a lower threshold Tu.
  • the further opening 20 can be optionally opened when the temperature Tx at the temperature sensor 18 rises above an upper threshold value To, so that the cooking chamber 1 further steam is withdrawn.
  • the further, closable opening 20 connects the cooking chamber 1 with the suction area 7 in front of the blower 6.
  • a closure 21 is provided, which consists of a flap 22 which is more or less far from a stepping or servomotor 23 can be pushed over the mouth of the opening 20, so that the shutter 21 can be transferred substantially continuously from a closed to an open position.
  • the flap 22 can only assume a closed or an open position. Intermediate positions for a reduced Flow through the further opening 20 can in this case, if necessary, be achieved by repeated, brief opening and closing of the flap 22, in the sense of pulse width modulation.
  • the temperature signal Tx of the temperature sensor can also be used to detect a gas outlet from the food itself, which event takes place approximately at a heated food to about 90 Ā° Celsius.
  • This gas outlet from the food in turn causes a steam outlet from the oven, which can be detected by the temperature sensor.
  • the recognition of this event allows a more precise control of the further cooking process, since conclusions about the volume, nature, etc of the food can be made on the basis of the timing of this event.
  • Escaping gases and vapors can also be removed by opening the other opening, be vented to high pressure, and to keep the oxygen level in the oven low
  • a cooking chamber temperature sensor 25 may further be provided, with which the temperature of the cooking chamber 1 can be measured. Further, a core temperature sensor may be present (not shown), for example in the form of a needle that can be pricked into the food.
  • the microwave function can alternatively be controlled by a humidity sensor 26 in the cooking chamber 1, which receives the relative humidity in the cooking chamber 1.
  • the cooking appliance after FIG. 1 may be operated in various modes of operation, for which purpose the controller 24 is to be provided with suitable input elements via which the user can select a desired program.
  • the device can be used in a conventional manner as a cooking appliance, for example by entering a desired oven temperature.
  • FIG. 2 shows a schematic illustration of a cooking appliance according to another embodiment the invention.
  • This cooking appliance contains in a housing, not shown, a water tank 1, a boiler used as a steam generator 2, a cooking chamber 3, a not shown microwave generator, and a controller 4.
  • the water tank 1 is preferably a drawer-like insert that holds a supply of water, preferably more as 500 ml, in an advantageous development more than 800 ml, and another version 1 liter.
  • water can be taken from the water tank 1 and led to the steam generator 2.
  • remaining water in the steam generator 2 can be pumped back to the water tank 1 via a drain line 7 and a drain pump 8.
  • a heating coil 9 is arranged, which is supplied by the controller 4 when needed with power. If the water is brought to boil in the steam generator 2, then steam flows via a line 10 into the cooking chamber 3 and heats the food. Excess steam escapes through an opening 11. If the water level in the steam generator 2 drops below a certain limit, the controller 4 switches on the pump 6 during normal operation, so that water can flow from the water tank 1. For this purpose, a not shown level sensor is arranged in the steam generator 2.
  • a cooking chamber temperature sensor 12 is provided to regulate a temperature Tg in the cooking chamber. Furthermore, a temperature sensor 18 is provided, which measures the temperature Tx of outflowing steam at the opening 11. It turns out that the temperature Tx increases as soon as steam begins to exit through the opening 11. A steam outlet can therefore be detected, for example, by comparing the temperature Tx with a first temperature threshold T1, wherein the first threshold value has, for example, a value between 30 Ā° and 50 Ā° Celsius. If Tx> T1, steam exits through the opening 11, ie a certain level of steam is reached around the cooking space 1, at which either sufficient steam would have to be present, to perform a microwave operation more energy efficient, ie with less power and / or better Garresultat than without steam.
  • an exit of steam is also detected with the aid of the temperature sensor 18, wherein the measured temperature Tx is compared with a second threshold T2 having an exemplary value between 50 Ā° and 70 Ā° Celsius. If Tx> T2, vapor is increasingly exiting through the opening 11, i. the steam cooking in the cooking chamber 1 is in full swing and could even be accelerated by the addition of microwaves. In this respect, if the second threshold value T2, i. at Tx> T2, the microwave generator is turned on.
  • the cooking appliance has an input unit 13, at which the user can set the desired setpoint temperature Tg of the cooking chamber 3.
  • a ceiling heating 20 and a floor heating 21 can be arranged on the cooking chamber 3, with which the ceiling or the bottom of the cooking chamber 3 can be heated.
  • laterally arranged heaters may be provided for heating the side walls.
  • the heater 19 and optionally the ceiling heater 20 and the floor heating 21 can be used, among other things, to pre-heat the cooking chamber before steaming.
  • the cooking chamber 3 is preheated to a preheating temperature Tgv before steam is supplied.
  • This preheating temperature is preferably 1 to 10 Ā° C, in particular about 5 Ā° C below the target temperature Tgs. Steam is only conducted into the oven when the preheat Tgv is reached. This can avoid that too much condensate precipitates or that a deflagration of the steam takes place.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Ovens (AREA)

Description

Gebiet der ErfindungField of the invention

Die Erfindung betrifft ein GargerƤt zum Garen von Gargut und ein Verfahren zum Betreiben eines GargerƤtes.The invention relates to a cooking appliance for cooking food and a method for operating a cooking appliance.

Hintergrundbackground

DampfgargerƤte erfreuen sich zunehmender Beliebtheit ob Ihrer das Gargut schonenden Garweise. Dabei wird einem Garraum Dampf zugefĆ¼hrt, um den Garraum und das darin befindliche Gargut zu erwƤrmen.Steam cooking appliances are becoming more and more popular if they are cooked in the same way. In this case, a cooking chamber steam is supplied to heat the cooking chamber and the food therein.

Die EP 2 322 859 A1 zeigt ein GargerƤt mit einem Luftaustritt aus dem Garraum, der gegenĆ¼ber bekannten Klappenmechanismen verbessert werden soll. Das GargerƤt kann beheizt werden mit Mikrowelle, Heissluft, Dampf oder einer Kombination. In dem Luftaustritt kann ein Feuchtesensor angeordnet sein.The EP 2 322 859 A1 shows a cooking appliance with an air outlet from the oven, which is to be improved over known flap mechanisms. The cooking appliance can be heated with microwave, hot air, steam or a combination. In the air outlet, a humidity sensor may be arranged.

Die EP 2 083 223 A1 zeigt ein GargerƤt mit einem Dampferzeuger, einem Heisslufterzeuger, einem Mikrowellengenerator und einer Unterhitze. Ein Garraum des GargerƤts wird Ć¼ber eine verstellbare Klappe entlĆ¼ftet. Ein Feuchtesensor kann im Luftaustritt angeordnet sein. Im Dampfbetrieb wird der Luftaustritt verschlossen, um ein Auskondensieren von Dampf am Feuchtesensor zu verhindern.The EP 2 083 223 A1 shows a cooking appliance with a steam generator, a hot air generator, a microwave generator and a bottom heat. A cooking chamber of the cooking appliance is vented via an adjustable flap. A humidity sensor can be arranged in the air outlet. In steam mode, the air outlet is closed to prevent steam from condensing on the humidity sensor.

Die JP 2006 284013 A zeigt ein GargerƤt mit einem Dampferzeuger und einem Heissluftgenerator sowie einen Luftaustritt aus einem Garraum des GargerƤts.The JP 2006 284013 A shows a cooking appliance with a steam generator and a hot air generator and an air outlet from a cooking chamber of the cooking appliance.

Darstellung der ErfindungPresentation of the invention

Aufgabe der Erfindung ist es, einen Garprozess und ein GargerƤt anzugeben, die den vorgestellten Dampfgarbetrieb weiter entwickeln, sodass die Gardauer reduziert wird und/oder das Garergebnis verbessert wird.The object of the invention is to provide a cooking process and a cooking appliance, which further develop the steam cooking operation presented, so that the cooking time is reduced and / or the cooking result is improved.

Die Aufgabe wird gelƶst durch ein GargerƤt mit den Merkmalen des Patentanspruchs 1 und durch ein Verfahren zum Betreiben von GargerƤten nach den Merkmalen des Patentanspruchs 10.The object is achieved by a cooking appliance with the features of patent claim 1 and by a method for operating cooking appliances according to the features of patent claim 10.

GemƤss einem ersten Aspekt weist das GargerƤt einen Garraum zur Aufnahme eines Gargutes auf. Garen im Kontext dieser Erfindung soll alle Arten des ErwƤrmens des Gargutes umfassen, also das ErwƤrmen, das Erhitzen, wie auch das Auftauen von Lebensmitteln, Speisen, FlĆ¼ssigkeiten, etc.. Der Garraum ist typischerweise ein einseitig offener Hohlkƶrper, im Kontext von Backƶfen auch Muffel genannt, dessen offene Seite mit einer TĆ¼re verschliessbar ist. Es ist ferner ein Dampferzeuger vorgesehen, der ein ZufĆ¼hren von Dampf, insbesondere Wasserdampf, in den Garraum erlaubt. Dabei seien externe Dampferzeuger mit eingeschlossen, die Dampf ausserhalb des Garraums erzeugen, welcher Dampf dann Ć¼ber eine Zuleitung in den Garraum eingeleitet wird. Der beanspruchte Dampferzeuger soll aber auch interne Dampferzeuger mit umfassen, bei denen der Dampf innerhalb des Garraums, beispielsweise durch Erhitzen von Wasser, erzeugt wird.According to a first aspect, the cooking appliance has a cooking chamber for receiving a food item. Cooking in the context of this invention is intended to include all types of heating of the food, ie heating, heating, as well as the thawing of food, food, liquids, etc .. The cooking chamber is typically a one-sided open hollow body, in the context of ovens also muffle called, whose open side can be closed with a door is. Furthermore, a steam generator is provided, which allows a supply of steam, in particular steam, into the cooking chamber. In this case, external steam generators are included, which generate steam outside the cooking chamber, which steam is then introduced via a supply line into the cooking chamber. The claimed steam generator should also include internal steam generators, in which the steam within the cooking chamber, for example by heating water, is generated.

Ferner weist das GargerƤt eine Ɩffnung im Garraum auf, die das Austreten von Dampf aus dem Garraum ermƶglicht. Diese Ɩffnung ist also insbesondere als zusƤtzlich zur TĆ¼rƶffnung vorgesehene Ɩffnung zu verstehen, die einen Austritt von Dampf auch bei geschlossener TĆ¼re ermƶglicht. Eine solche Ɩffnung mag beispielsweise einen etwa mĆ¼nzgrossen Querschnitt aufweisen.Furthermore, the cooking appliance has an opening in the cooking chamber, which allows the escape of steam from the cooking chamber. This opening is therefore to be understood in particular as an opening provided in addition to the door opening, which allows an escape of steam even when the door is closed. Such an opening may for example have an approximately coin-sized cross-section.

ZusƤtzlich zum Dampfgenerator ist ein Mikrowellengenerator zum Erhitzen von im Garraum aufgenommenem Gargut vorgesehen. Durch das Vorsehen zweier unterschiedlicher ErwƤrmungsarten fĆ¼r das Gargut ist das vorliegende GargerƤt ein sogenanntes KombigerƤt. Ferner ist eine Steuerung vorgesehen, vorzugsweise eine elektronische Steuerung fĆ¼r den Betrieb des GargerƤts. Diese Steuerung empfƤngt unter anderen das Signal eines Sensors, der einen Parameter von aus der Ɩffnung austretendem Dampf misst. Dieser Parameter kann die Temperatur des austretenden Dampfs sein fĆ¼r den Fall, dass der Sensor als Temperatursensor ausgebildet ist. Dieser Parameter kann der Durchfluss des austretenden Dampfs sein fĆ¼r den Fall, dass der Sensor als Flusssensor ausgebildet ist. Dieser Parameter kann der Druck des austretenden Dampfs sein fĆ¼r den Fall, dass der Sensor als Drucksensor ausgebildet ist. Dieser Parameter kann die Feuchte des austretenden Dampfs sein fĆ¼r den Fall, dass der Sensor als Feuchtesensor ausgebildet ist. Der Sensor kann ein kombinierter Sensor aus zwei oder mehreren der vorhergehenden Einzelsensoren sein und damit sein Messergebnis auf zwei oder mehr unterschiedliche physikalische Parameter abstĆ¼tzen.In addition to the steam generator, a microwave generator is provided for heating cooking food received in the cooking chamber. By providing two different types of heating for the food to be cooked, the present cooking device is a so-called combination device. Furthermore, a controller is provided, preferably an electronic controller for the operation of the cooking appliance. Among other things, this controller receives the signal from a sensor that measures a parameter of steam exiting the orifice. This parameter may be the temperature of the exiting vapor in the event that the sensor is designed as a temperature sensor. This parameter may be the flow of the exiting vapor in the event that the sensor is designed as a flow sensor. This parameter may be the pressure of the exiting vapor in the event that the sensor is designed as a pressure sensor. This parameter may be the moisture of the exiting vapor in the event that the sensor is designed as a humidity sensor. The sensor may be a combined sensor of two or more of the preceding individual sensors and thus support its measurement result on two or more different physical parameters.

Vorzugsweise ist der Sensor angeordnet an der Ɩffnung selbst oder aber in einem Fortsatz der Ɩffnung, auch MĆ¼ndung genannt, welcher Fortsatz den Garraum mit einem Aussenraum ausserhalb des Garraums verbindet. Der Sensor kann dabei an einer Innenwand oder an einer Aussenwand der Fortsatzes zum Messen des Parameters angeordnet sein kann. Der Sensor kann aber beispielsweise auch im Garraum selbst nahe der Ɩffnung angeordnet sein. Auch dort kann er einen Parameter von durch die Ɩffnung austretendem Dampf messen. Dabei mag der Sensor beispielsweise innerhalb eines Radius von hƶchstens 5 cm um die Ɩffnung herum angeordnet sein.Preferably, the sensor is arranged at the opening itself or in an extension of the opening, also called mouth, which extension connects the cooking chamber with an outside space outside the cooking chamber. The sensor can be arranged on an inner wall or on an outer wall of the extension for measuring the parameter. However, the sensor can also be arranged, for example, in the cooking chamber itself near the opening. There, too, he can measure a parameter of steam exiting through the aperture. In this case, the sensor may be arranged, for example, within a radius of at most 5 cm around the opening.

GemƤss einem weiteren Aspekt der Erfindung weist ein GargerƤt zum Garen von Gargut einen Garraum zur Aufnahme des Garguts auf sowie einen Dampfgenerator zum ZufĆ¼hren von Dampf in den Garraum. Ein Sensor ist nun vorgesehen zum Messen eines Parameters von Dampf im Garraum. Es ist wiederum ein Mikrowellengenerator vorgesehen zum Erhitzen des im Garraum aufgenommenen Garguts. Eine Steuerung steuert den Mikrowellengenerator abhƤngig von dem von dem Sensor gemessenen Parameter.According to a further aspect of the invention, a cooking device for cooking food to a cooking chamber for receiving the food and a steam generator for supplying steam into the cooking chamber. A sensor is now provided for measuring a parameter of steam in the cooking chamber. In turn, a microwave generator is provided for heating the cooking product received in the cooking chamber. A controller controls the microwave generator depending on the parameter measured by the sensor.

Hierbei wird nun anstelle einer mittelbaren Messung der DampfsƤttigung im Garraum durch das Messen eines Parameters von aus dem Garraum austretendem Dampf ein direktes Mass fĆ¼r die DampfsƤttigung im Garraum aufgenommen. Dies kann insbesondere durch einen im Garraum angeordneten Feuchtesensor erfolgen, der beispielsweise eine relative Feuchte Im Garraum aufnimmt. Eine Ɩffnung im Garraum zum Dampfaustritt mag vorzugsweise nach wie vor vorhanden sein.Here, instead of an indirect measurement of the vapor saturation in the cooking chamber by measuring a parameter exiting from the cooking steam a direct measure of the vapor saturation in the cooking chamber is added. This can be done, in particular, by a moisture sensor arranged in the cooking chamber, which receives, for example, a relative humidity in the cooking chamber. An opening in the cooking chamber for steam outlet may preferably still be present.

Die Steuerung ihrerseits steuert in beiden Aspekten nun den Mikrowellengenerator abhƤngig von dem vom Sensor gemessenen Parameter. Das Steuern kann beispielsweise eine oder mehrere der folgenden Aktionen hervorrufen:

  • Ein Einschalten des Mikrowellengenerators;
  • Ein Ausschalten des Mikrowellengenerators;
  • Ein Erhƶhen der Leistung des Mikrowellengenerators;
  • Ein Erniedrigen der Leistung des Mikrowellengenerators;
  • Ein Bestimmen einer Zeitdauer des Betriebs des Mikrowellengenerators;
  • Ein VerlƤngern einer Zeitdauer des Betriebs des Mikrowellengenerators;
  • Ein VerkĆ¼rzen einer Zeitdauer des Betriebs des Mikrowellengenerators;
  • Eine Auswahl eines Mikrowellenprogramms;
  • o.Ƥ.
The controller in turn controls the microwave generator in both aspects depending on the parameter measured by the sensor. For example, the control may cause one or more of the following actions:
  • Turning on the microwave generator;
  • Turning off the microwave generator;
  • Increasing the power of the microwave generator;
  • Lowering the power of the microwave generator;
  • Determining a duration of operation of the microwave generator;
  • Prolonging a period of operation of the microwave generator;
  • Shortening a period of time of operation of the microwave generator;
  • A selection of a microwave program;
  • etc.

Die Steuerung kann in vorteilhaften Weiterbildungen ausgebildet sein zum Steuern des Mikrowellengenerators abhƤngig von einem oder mehreren der folgenden Ereignisse, auch Auslƶseereignisse oder Triggerereignisse genannt:

  • Ein Ɯberschreiten eines Schwellwerts durch den gemessenen Parameter - welcher Parameter typischerweise als Sensorsignal vorverarbeitet und an die Steuerung Ć¼bertragen wird;
  • Ein Unterschreiten eines Schwellwerts durch den gemessenen Parameter;
  • Ein Ɯber- oder Unterschreiten eines Schwellwerts durch einen Gardienten des gemessenen Parameters;
  • Einem Muster im gemessenen Parameter,
  • o.Ƥ.
The controller may be formed in advantageous developments for controlling the microwave generator depending on one or more of the following events, also called trigger events or trigger events:
  • Exceeding a threshold by the measured parameter - which parameter is typically preprocessed as a sensor signal and transmitted to the controller;
  • Below a threshold value by the measured parameter;
  • Exceeding or falling below a threshold by a guardian of the measured parameter;
  • A pattern in the measured parameter,
  • etc.

Das Zugeben der Mikrowellenfunktion in AbhƤngigkeit von dem Dampfaustrittssignal verkĆ¼rzt die Gardauer; das Abschalten der Mikrowellenfunktion in AbhƤngigkeit von dem Dampfaustrittssignal verhindert ein Verkochen des Gargutes. Der Sensor zeigt typischerweise den Grad des Dampfzustands im Garraum mittelbar an, da je mehr Dampf sich im Garraum befindet, desto mehr Dampf durch die Ɩffnung austreten wird. Andererseits wird kaum Dampf durch die Ɩffnung austreten, wenn erst wenig Dampf im Garraum ist oder erst wenig Dampf dem Garraum zugefĆ¼hrt wurde. Die quantitative Erfassung des austretenden Dampfes mag abhƤngen von den Druckbedingungen, die am Ausgang der Ɩffnung herrschen und weiteren Einflussgrƶssen, die den Innendruck im Garraum bestimmen.The addition of the microwave function as a function of the steam exit signal shortens the cooking time; switching off the microwave function as a function of the steam outlet signal prevents cooking of the food. Typically, the sensor will indirectly indicate the degree of steam in the cooking chamber, as the more steam is in the cooking chamber, the more steam will escape through the orifice. On the other hand, hardly Steam out through the opening, when only a little steam in the cooking chamber or only a little steam was supplied to the cooking chamber. The quantitative detection of the exiting vapor may depend on the pressure conditions that prevail at the outlet of the opening and other factors that determine the internal pressure in the cooking chamber.

Insofern kann der Garprozess und das Garergebnis verbessert werden: So kann beispielsweise in einer ersten Betriebsweise mit einer Mikrowellenzugabe gewartet werden, bis zumindest ein bestimmtes Dampfniveau im Garraum erreicht ist, unter der Annahme, dass der Dampf primƤr als Ɯbertragungsmedium fĆ¼r die Mikrowelle zum Sensor hin erachtet wird, sodass der Mikrowellengenerator mit einer besseren Messbarkeit betrieben werden kann unter vorheriger Zugabe von Dampf. Eine bessere Energieaufnahme durch das Gargut mag die Folge sein. Ausserdem kann die Leistungsverteilung verbessert und ein lokales Austrocknen des Gargutes verhindert werden. Insofern kann beispielsweise in diesem ersten Betrieb das Garen mit einem reinen Dampfgarbetrieb begonnen werden. Wenn dann beispielsweise der Sensor, der hier als Temperatursensor ausgebildet sei, eine bestimmte Temperatur des austretenden Dampfes anzeigt, welche Temperatur einen ersten Schwellwert Ć¼berschreitet, so wird ab Ɯberschreiten dieses ersten Schwellwertes der Mikrowellengenerator zugeschaltet.In this respect, the cooking process and the cooking result can be improved: For example, in a first mode of operation with a microwave addition can be waited until at least a certain steam level is reached in the cooking chamber, assuming that the steam primarily acts as a transfer medium for the microwave to the sensor so that the microwave generator can be operated with better measurability with the prior addition of steam. A better energy intake by the food may be the result. In addition, the power distribution can be improved and local drying of the food can be prevented. In this respect, for example, in this first operation, cooking can be started with a pure steam cooking operation. If, for example, the sensor, which is designed here as a temperature sensor, indicates a certain temperature of the exiting vapor, which temperature exceeds a first threshold value, the microwave generator is switched on when this first threshold value is exceeded.

In einer zweiten beispielhaften Betriebsweise wird das Garen des Gargutes primƤr durch Dampfgaren erzielt. Die Mikrowellenzugabe soll lediglich das Dampfgaren beschleunigen, indem die Mikrowellenfunktion zugegeben wird, entweder ab Beginn des Dampfgarens, oder aber wenn bereits ein gewisses Garniveau erzielt wurde und dementsprechend die Temperatur am Sensor einen zweiten Schwellwert Ć¼berschreitet. Hier soll die Mikrowellenbeigabe zum einen der ZeitverkĆ¼rzung des Garens dienen. Zum anderen ist eine Mikrowellenbeigabe fĆ¼r das Garergebnis vorteilhaft, da das Gargut durch die Mikrowellenbeigabe insbesondere in seinem Inneren erhitzt wird, wohingegen das Dampfgaren von aussen auf das Gargut wirkt. Auch mag die Mikrowelle in der zweiten Betriebsweise beispielsweise nur fĆ¼r eine kurze Zeitspanne, eventuell mit maximaler Leistung, zugeschaltet bleiben.In a second exemplary mode of cooking of the food is achieved primarily by steaming. The addition of microwave is only intended to accelerate steam cooking by adding the microwave function, either from the start of steam cooking, or when a certain cooking level has already been achieved and, accordingly, the temperature at the sensor exceeds a second threshold. Here is the microwave addition serve for a time reduction of cooking. On the other hand, a microwave addition for the cooking result is advantageous because the food to be cooked by the microwave addition is heated in particular in its interior, whereas the steam cooking acts on the food from the outside. Also, the microwave in the second mode of operation, for example, remain switched on only for a short period of time, possibly with maximum power.

Die Erfindung verbindet also das Dampfgaren und das Mikrowellengaren in vorteilhafter Weise durch die Steuerung des Mikrowellengenerators Ć¼ber eine den Dampfaustritt aus dem Garraum reprƤsentierende Grƶsse. Es wurde festgestellt, dass damit das Gargut schneller und/oder wƤrmer erhitzt werden kann, und dass das Gargut darĆ¼ber hinaus nicht so schnell austrocknet. Auch der RestwasserĆ¼berschuss kann durch die vorgeschlagenen Verfahren verringert werden.The invention thus combines the steam cooking and the microwave cooking advantageously by the control of the microwave generator via a size representing the steam outlet from the cooking chamber. It has been found that this way the food can be heated faster and / or warmer, and that the food does not dry out too quickly. The residual water surplus can also be reduced by the proposed methods.

Vorzugsweise kann auch das Dampfgaren in Kombination mit der Beigabe von Heissluft erfolgen. Alle vorgenannten Betriebsarten kƶnnen auch zum Regenerieren eingesetzt werden.Preferably, the steam cooking can be done in combination with the addition of hot air. All the above operating modes can also be used for regeneration.

Der vorgeschlagene Betrieb des GargerƤts kann vorzugsweise durch die Auswahl eines bestimmten Garprogramms Ć¼ber einen Wahlschalter ausgelƶst werden. Ein solches Wahlprogramm mag explizit auf ein kombiniertes Dampf- und Mikrowellengaren verweisen. Alternativ mag der vorgeschlagene Betrieb stets durchgefĆ¼hrt werden, wenn eines der Garprogramme "Dampfgaren" oder "Mikrowellengaren" vom Benutzer ausgewƤhlt wird. Ein solcher Betrieb mag auch wƤhrend eines herkƶmmlichen Garprogramms durch den Benutzer aktiviert werden, beispielhaft durch die Bedienung einer Optionstaste. Der vorgeschlagene Betrieb kann auch dann automatisch aktiviert werden, wenn unabhƤngig vom Garprogramm entweder der Dampfgenerator oder der Mikrowellengenerator aktiviert ist. Vorzugsweise kann der vorgeschlagene Betrieb auch dann aktiviert werden, wenn der Mikrowellengenerator und der Dampfgenerator gleichzeitig aktiviert sind.The proposed operation of the cooking appliance can preferably be triggered by the selection of a specific cooking program via a selector switch. Such an election program may explicitly refer to combined steam and microwave cooking. Alternatively, the proposed operation may always be performed when one of the cooking programs "steam cooking" or "microwave cooking" is selected by the user. Such operation may also be activated by the user during a conventional cooking program, for example, by the operation of an option key. The proposed operation can also be activated automatically if, independently of the cooking program, either the steam generator or the microwave generator is activated. Preferably, the proposed operation can be activated even if the microwave generator and the steam generator are activated simultaneously.

GemƤss einem weiteren Aspekt der Erfindung umfasst ein Verfahren zum Betreiben eines GargerƤtes zum Garen von Gargut das ZufĆ¼hren von von einem Dampfgenerator erzeugtem Dampf in einen Garraum, das Messen eines Parameters von durch eine Ɩffnung aus dem Garraum austretendem Dampf, und das Steuern eines Mikrowellengenerators abhƤngig von dem gemessenen Parameter.According to a further aspect of the invention, a method for operating a cooking appliance for Cooking food, feeding steam generated by a steam generator into a cooking space, measuring a parameter of steam exiting through an opening from the cooking space, and controlling a microwave generator depending on the measured parameter.

GemƤss einem anderen Aspekt der Erfindung umfasst ein Verfahren zum Betreiben eines GargerƤtes zum Garen von Gargut das ZufĆ¼hren von Dampf in einen Garraum, das Messen eines Parameters von Dampf im Garraum, und das Steuern eines Mikrowellengenerators abhƤngig von dem gemessenen Parameter. Hier wiederum wird vorzugsweise die Feuchte im Garraum gemessen.According to another aspect of the invention, a method of operating a cooking appliance for cooking food comprises supplying steam into a cooking chamber, measuring a parameter of steam in the cooking chamber, and controlling a microwave generator depending on the measured parameter. Here, again, preferably the moisture in the oven is measured.

Vorteilhafte Weiterbildungen der Erfindung sind durch die UnteransprĆ¼che gekennzeichnet.Advantageous developments of the invention are characterized by the subclaims.

Weiterbildungen, die in Zusammenhang mit dem GargerƤt ausdrĆ¼cklich offenbart sind, seien auch als zum Verfahren zugehƶrig offenbart anzusehen, und umgekehrt.Further developments, which are expressly disclosed in connection with the cooking appliance, are also to be regarded as disclosed belonging to the method, and vice versa.

Kurze Beschreibung der ZeichnungenBrief description of the drawings

Weitere Ausgestaltungen, Vorteile und Anwendungen der Erfindung ergeben sich aus den abhƤngigen AnsprĆ¼chen und aus der nun folgenden Beschreibung anhand der Figuren. Dabei zeigen:

  • Fig. 1 einen Querschnitt durch ein GargerƤt nach einem AusfĆ¼hrungsbeispiel der Erfindung, und
  • Fig. 2 eine schematische Illustration eines GargerƤts nach einem weiteren AusfĆ¼hrungsbeispiel der Erfindung.
Further embodiments, advantages and applications of the invention will become apparent from the dependent claims and from the following description with reference to FIGS. Showing:
  • Fig. 1 a cross section through a cooking appliance according to an embodiment of the invention, and
  • Fig. 2 a schematic illustration of a cooking appliance according to another embodiment of the invention.

Weg(e) zur AusfĆ¼hrung der ErfindungWay (s) for carrying out the invention

Das GargerƤt gemƤss Fig. 1 umfasst einen Garraum 1, der von WƤnden 2 und einer TĆ¼re 3 begrenzt wird. Der Garraum mag beispielsweise 50 Liter und mehr umfassen, beispielsweise 56 Liter. Das gezeigte GargerƤt kann zumindest sowohl als DampfgargerƤt, als MikrowellengerƤt und als kombiniertes Dampfgar-/MikrowellengerƤt betrieben werden. Das GargerƤt enthƤlt einen schematisch eingezeichneten und vom Garraum 1 separierten Dampfgenerator 4, dessen Dampf Ć¼ber eine Zuleitung dem Garraum 1 zugefĆ¼hrt wird. Ein Mikrowellengenerator mit dem Bezugszeichen 31 ist schematisch in der Decke des Garraums 1 angeordnet und mag beispielsweise eine Hƶchstleistung von 700 Watt liefern. Das GargerƤt kann optional auch als Backofen betrieben werden, wofĆ¼r es in einer vorteilhaften Weiterbildung eine konventionelle resistive Heizung mit Oberhitze 5a und Unterhitze 5b enthƤlt. Alternativ oder zusƤtzlich zur Heizung 5a, 5b kann das GargerƤt auch mit Heissluft oder mit einem Grill-Heizkƶrper ausgestattet sein.The cooking appliance according to Fig. 1 comprises a cooking chamber 1, which is bounded by walls 2 and a door 3. The cooking space may for example comprise 50 liters and more, for example, 56 liters. The cooking appliance shown can be operated at least both as a steam cooker, as a microwave oven and as a combined Dampfgar- / microwave oven. The cooking appliance includes a schematically drawn and separated from the cooking chamber 1 steam generator 4, the steam is supplied to the cooking chamber 1 via a supply line. A microwave generator with the reference numeral 31 is arranged schematically in the ceiling of the cooking chamber 1 and may for example provide a maximum power of 700 watts. The cooking appliance can optionally also be operated as an oven, for which, in an advantageous development, it contains a conventional resistive heater with top heat 5a and bottom heat 5b. Alternatively or in addition to the heater 5a, 5b, the cooking appliance may also be equipped with hot air or with a grill radiator.

Ausserhalb des Garraums 1 ist ein LĆ¼fter 6 als GeblƤse angeordnet, beispielsweise ein QuerstromlĆ¼fter. Der LĆ¼fter 6 fƶrdert Luft von einem Ansaugbereich 7 in einen Druckraum 8. Vom Druckraum 8 tritt die gefƶrderte Luft durch eine frontseitige Austrittsƶffnung 9 des GerƤts in die Umgebung aus. Der Druckraum 8 wird nach oben durch eine geneigte Deckplatte 10 und nach unten durch eine geneigte Bodenplatte 11 begrenzt, derart, dass sich der Druckraum 8 vorzugsweise gegen die Austrittsƶffnung 9 hin verjĆ¼ngt. Seitlich ist der Druckraum durch SeitenwƤnde (nicht gezeigt) geschlossen. Die Deckplatte 10 und die Bodenplatte 11 kƶnnen beispielsweise aber auch in etwa parallel zueinander gefĆ¼hrt sein. Weitere konstruktive Varianten sind denkbar.Outside the cooking chamber 1, a fan 6 is arranged as a fan, for example a cross-flow fan. The fan 6 conveys air from a suction area 7 in a pressure chamber 8. From the pressure chamber 8, the conveyed air passes through a front outlet opening 9 of the device in the environment. The pressure chamber 8 is bounded above by an inclined cover plate 10 and down through an inclined bottom plate 11, such that the pressure chamber 8 preferably tapers towards the outlet opening 9. Laterally, the pressure chamber is closed by side walls (not shown). The cover plate 10 and the bottom plate 11 may, for example, but also be guided approximately parallel to each other. Other design variants are conceivable.

In der Decke des Garraums 1 sind eine Ɩffnung 14 und eine weitere Ɩffnung 20 angeordnet. Die weitere Ɩffnung 20 besitzt einen Durchmesser von rund 2.5 cm, die Ɩffnung 14 ist vorzugsweise kleiner. Das GargerƤt besitzt eine Vorrichtung zum Messen eines Dampfaustritts aus dem Garraum 1. Diese Vorrichtung umfasst die Ɩffnung 14, welche als Messƶffnung dient und vom Garraum 1 in den Innenraum 15 eines SchutzgehƤuses 16 fĆ¼hrt. Das SchutzgehƤuse 16 ist im Druckraum 8 angeordnet und kommuniziert mit diesem Ć¼ber eine Verbindungsƶffnung 17. Die Verbindungsƶffnung 17 befindet sich auf der dem LĆ¼fter 6 abgewandten Seite des SchutzgehƤuses 16. Im SchutzgehƤuse 16 ist ferner bei der MĆ¼ndung der Ɩffnung 14 ein Temperatursensor 18, beispielsweise in Form eines NTC-Widerstands angeordnet, der eine Temperatur Tx misst. Die Ɩffnung 14 ist vorzugsweise immer geƶffnet.In the ceiling of the cooking chamber 1, an opening 14 and a further opening 20 are arranged. The further opening 20 has a diameter of about 2.5 cm, the opening 14 is preferably smaller. The cooking appliance has a device for measuring a steam outlet from the Cooking chamber 1. This device comprises the opening 14, which serves as a measuring opening and leads from the cooking chamber 1 into the interior 15 of a protective housing 16. The protective housing 16 is arranged in the pressure chamber 8 and communicates with this via a connection opening 17. The connection opening 17 is located on the side facing away from the fan 6 of the protective housing 16. In the protective housing 16 is also at the mouth of the opening 14, a temperature sensor 18, for example in Formed an NTC resistor, which measures a temperature Tx. The opening 14 is preferably always open.

Im Betrieb des GargerƤts ist das GeblƤse 6 vorzugsweise permanent in Betrieb. Dabei saugt es Luft durch Ɩffnungen in der RĆ¼ckwand und in den SeitenwƤnden des GargerƤts aus der Umgebung an. Diese Luft durchtritt den Ansaugbereich 7, wird in den Druckraum 8 geblasen und verlƤsst diesen durch die Austrittsƶffnung 9. Da der Druckraum 8 gegen die Austrittsƶffnung 9 hin verjĆ¼ngt ist, entsteht dabei im Druckraum 8 ein leichter Ɯberdruck, d.h. ein Druck, der hƶher als der Umgebungsdruck ist, wƤhrend der Druck im Ansaugbereich 7 geringer ist. Damit muss im Garraum 1 ein gewisser Ɯberdruck herrschen, damit eine Temperaturerhƶhung am Temperatursensor 18 festgestellt werden kann, die auf einen Gas- / Dampfaustritt durch die Ɩffnung 14 schliessen lƤsst. Eine andere Aufgabe des LĆ¼fters 6 besteht darin, zur KĆ¼hlung des GargerƤts die Luft, die sich an der Aussenseite des Garraums 1 erwƤrmt hat, nach aussen abzufĆ¼hren.During operation of the cooking appliance, the fan 6 is preferably permanently in operation. It sucks in air through openings in the rear wall and in the side walls of the cooking appliance from the environment. This air passes through the suction area 7, is blown into the pressure chamber 8 and leaves it through the outlet opening 9. Since the pressure chamber 8 tapers towards the outlet opening 9, a slight overpressure arises in the pressure space 8, ie. a pressure higher than the ambient pressure while the pressure in the suction area 7 is lower. This must prevail in the cooking chamber 1 a certain overpressure, so that a temperature increase can be detected at the temperature sensor 18, which can close to a gas / steam outlet through the opening 14. Another task of the fan 6 is to remove the air, which has warmed on the outside of the cooking chamber 1, to the outside for cooling the cooking appliance.

Zum Steuern des Dampfgenerators 4, des Mikrowellengenerators 31 und weiterer Komponenten des GargerƤts ist eine Steuerung 24 vorgesehen, die unter anderem das von dem Temperatursensor 18 abgegebene Temperatursignal Ć¼berwacht. Der Dampfgenerator 4 wird grundsƤtzlich gesteuert wie folgt: Wird an einer Bedieneinheit, beispielsweise in Form eines Wahlschalters, ein Garbetrieb durch den Benutzer eingestellt, der ein Dampfgaren zumindest mit umfasst, so wird der Dampfgenerator 4 eingeschaltet und der erzeugte Dampf dem Garraum 1 zugefĆ¼hrt. Aufgrund obiger AusfĆ¼hrungen wird das Austreten vom Dampf aus dem Garraum 1 erschwert durch die durch den LĆ¼fter 6 erzeugten DruckverhƤltnisse an der Ɩffnung 14. Insofern wird erst ab einem Dampfdruck im Garraum 1 hƶher als der Umgebungsdruck Dampf durch die Ɩffnung 14 entweichen, welcher Dampf dann durch einen Temperaturanstieg am Temperatursensor 18 erkannt und auch quantitativ aufgenommen werden kann. Ɯbersteigt die gemessene Temperatur Tx einen ersten Schwellwert T1, so wird der Mikrowellengenerator 31 zugeschaltet. Es wird dabei davon ausgegangen, dass ab dem Vorherrschen gewisser DampfverhƤltnisse im Garraum 1 reprƤsentiert durch den ersten Schwellwert T1 eine Mikrowellenzugabe schneller zum gewĆ¼nschten Garergebnis fĆ¼hrt und den Dampfgarprozess unterstĆ¼tzt.For controlling the steam generator 4, the microwave generator 31 and other components of the cooking appliance, a controller 24 is provided, which among other things monitors the temperature signal output by the temperature sensor 18. The steam generator 4 is basically controlled as follows: If a cooking operation is set by the user on an operating unit, for example in the form of a selector switch, which at least includes steaming, the steam generator 4 is switched on and the generated steam supplied to the cooking chamber 1. Due to the above, the escape of the steam from the cooking chamber 1 is difficult due to the pressure conditions generated by the fan 6 at the opening 14. Insofar, above a vapor pressure in the cooking chamber 1 higher than the ambient pressure steam escape through the opening 14, which then steam through a temperature increase detected at the temperature sensor 18 and can be recorded quantitatively. If the measured temperature Tx exceeds a first threshold value T1, then the microwave generator 31 is switched on. It is assumed that from the prevalence of certain steam conditions in the cooking chamber 1 represented by the first threshold T1, a microwave addition leads faster to the desired cooking result and supports the Dampfgarprozess.

Das Temperatursignal des Temperatursensors 18, oder in allgemeiner Form das Gasaustrittsignal des Gasaustrittsensors, wird vorzugsweise aber noch zu weiteren Zwecken verwendet: So kann beispielsweise dem Dampfgenerator 4 Energie zugefĆ¼hrt werden, wenn die Temperatur Tx am Temperatursensor 18 unter einen unteren Schwellenwert Tu fƤllt.The temperature signal of the temperature sensor 18, or in general form the gas outlet signal of the gas outlet sensor, but is preferably used for other purposes: For example, the steam generator 4 energy can be supplied when the temperature Tx at the temperature sensor 18 falls below a lower threshold Tu.

Auch kann die weitere Ɩffnung 20 optional geƶffnet werden, wenn die Temperatur Tx am Temperatursensor 18 Ć¼ber einen oberen Schwellwert To steigt, so dass dem Garraum 1 weiterer Dampf entzogen wird. Die weitere, verschliessbare Ɩffnung 20 verbindet den Garraum 1 mit dem Ansaugbereich 7 vor dem GeblƤse 6. Zum Verschliessen der zweiten Ɩffnung 20 ist ein Verschluss 21 vorgesehen, der aus einer Klappe 22 besteht, die von einem Schritt- oder Servomotor 23 mehr oder weniger weit Ć¼ber die MĆ¼ndung der Ɩffnung 20 geschoben werden kann, derart dass der Verschluss 21 im wesentlichen kontinuierlich von einer geschlossenen in eine geƶffnete Stellung Ć¼bergefĆ¼hrt werden kann. Denkbar ist auch eine AusfĆ¼hrung, bei welcher die Klappe 22 nur eine geschlossene oder eine offene Stellung einnehmen kann. Zwischenstellungen fĆ¼r einen reduzierten Durchfluss durch die weitere Ɩffnung 20 kƶnnen in diesem Fall, soweit notwendig, durch wiederholtes, kurzzeitiges Ɩffnen und Schliessen der Klappe 22 erreicht werden, im Sinne einer Pulsbreitenmodulation.Also, the further opening 20 can be optionally opened when the temperature Tx at the temperature sensor 18 rises above an upper threshold value To, so that the cooking chamber 1 further steam is withdrawn. The further, closable opening 20 connects the cooking chamber 1 with the suction area 7 in front of the blower 6. For closing the second opening 20, a closure 21 is provided, which consists of a flap 22 which is more or less far from a stepping or servomotor 23 can be pushed over the mouth of the opening 20, so that the shutter 21 can be transferred substantially continuously from a closed to an open position. Also conceivable is an embodiment in which the flap 22 can only assume a closed or an open position. Intermediate positions for a reduced Flow through the further opening 20 can in this case, if necessary, be achieved by repeated, brief opening and closing of the flap 22, in the sense of pulse width modulation.

Das Temperatursignal Tx des Temperatursensors kann auch zum Erkennen eines Gasaustritts aus dem Gargut selbst verwendet werden, welches Ereignis in etwa bei einem aufgeheizten Gargut auf etwa 90Ā° Celsius erfolgt. Dieser Gasaustritt aus dem Gargut verursacht seinerseits einen Dampfaustritt aus dem Garraum, der mit von dem Temperatursensor erkannt werden kann. Das Erkennen dieses Ereignisses wiederum erlaubt eine genauere Steuerung des weiteren Garprozesses, da aufgrund des Zeitpunktes dieses Ereignisses RĆ¼ckschlĆ¼sse Ć¼ber Volumen, Beschaffenheit, etc des Gargutes getroffen werden kƶnnen. Austretende Gase und DƤmpfe kƶnnen so auch durch Ɩffnen der weiteren Ɩffnung abtransportiert werden, zu hoher Ɯberdruck abgelassen werden, und den Sauerstoffpegel im Garraum niedrig zu haltenThe temperature signal Tx of the temperature sensor can also be used to detect a gas outlet from the food itself, which event takes place approximately at a heated food to about 90 Ā° Celsius. This gas outlet from the food in turn causes a steam outlet from the oven, which can be detected by the temperature sensor. The recognition of this event, in turn, allows a more precise control of the further cooking process, since conclusions about the volume, nature, etc of the food can be made on the basis of the timing of this event. Escaping gases and vapors can also be removed by opening the other opening, be vented to high pressure, and to keep the oxygen level in the oven low

Im Garraum 1 kann ferner ein Garraumtemperatur-Sensor 25 vorgesehen sein, mit welchem die Temperatur des Garraums 1 gemessen werden kann. Weiter kann auch ein Kerntemperatur-Sensor vorhanden sein (nicht gezeigt), beispielsweise in Form einer Nadel, die in das Gargut gestochen werden kann.In the cooking chamber 1, a cooking chamber temperature sensor 25 may further be provided, with which the temperature of the cooking chamber 1 can be measured. Further, a core temperature sensor may be present (not shown), for example in the form of a needle that can be pricked into the food.

Die Mikrowellenfunktion kann alternativ auch durch einen Feuchtesensor 26 im Garraum 1 gesteuert werden, der die relative Feuchte im Garraum 1 aufnimmt.The microwave function can alternatively be controlled by a humidity sensor 26 in the cooking chamber 1, which receives the relative humidity in the cooking chamber 1.

Das GargerƤt nach Figur 1 kann in verschiedenen Betriebsmodi betrieben werden, wozu die Steuerung 24 mit geeigneten Eingabeelementen zu versehen ist, Ć¼ber welche der Benutzer ein gewĆ¼nschtes Programm auswƤhlen kann. Insbesondere kann das GerƤt in konventioneller Weise als GargerƤt eingesetzt werden, zum Beispiel unter Eingabe einer gewĆ¼nschten Garraumtemperatur.The cooking appliance after FIG. 1 may be operated in various modes of operation, for which purpose the controller 24 is to be provided with suitable input elements via which the user can select a desired program. In particular, the device can be used in a conventional manner as a cooking appliance, for example by entering a desired oven temperature.

Figur 2 zeigt eine schematische Illustration eines GargerƤts nach einem weiteren AusfĆ¼hrungsbeispiel der Erfindung. Dieses GargerƤt enthƤlt in einem nicht dargestellten GehƤuse einen WasserbehƤlter 1, einen als Dampferzeuger 2 verwendeten Boiler, einen Garraum 3, einen nicht eingezeichneten Mikrowellengenerator, und eine Steuerung 4. Der WasserbehƤlter 1 ist vorzugsweise ein schubladenartiger Einsatz, der eine Vorratsmenge Wasser fasst, vorzugsweise mehr als 500 ml, in einer vorteilhaften Weiterbildung mehr als 800 ml, und einer anderen AusfĆ¼hrung 1 Liter. Ɯber ein Ansaugrohr 5 und eine Ansaugpumpe 6 kann dem WasserbehƤlter 1 Wasser entnommen und zum Dampferzeuger 2 gefĆ¼hrt werden. Nach dem Betrieb kann im Dampferzeuger 2 verbleibendes Wasser Ć¼ber eine Abflussleitung 7 und eine Abflusspumpe 8 zurĆ¼ck zum WasserbehƤlter 1 gepumpt werden. Im Dampferzeuger 2 ist eine Heizschlange 9 angeordnet, die von der Steuerung 4 bei Bedarf mit Strom versorgt wird. Wird das Wasser im Dampferzeuger 2 zum Kochen gebracht, so strƶmt Dampf Ć¼ber eine Leitung 10 in den Garraum 3 und erwƤrmt das Gargut. ƜberschĆ¼ssiger Dampf entweicht durch eine Ɩffnung 11. Sinkt das Wasserniveau im Dampferzeuger 2 unter eine gewisse Grenze, so schaltet die Steuerung 4 im Normalbetrieb die Pumpe 6 ein, so dass Wasser vom WasserbehƤlter 1 nachfliessen kann. Hierzu ist im Dampferzeuger 2 ein nicht gezeigter Niveausensor angeordnet. FIG. 2 shows a schematic illustration of a cooking appliance according to another embodiment the invention. This cooking appliance contains in a housing, not shown, a water tank 1, a boiler used as a steam generator 2, a cooking chamber 3, a not shown microwave generator, and a controller 4. The water tank 1 is preferably a drawer-like insert that holds a supply of water, preferably more as 500 ml, in an advantageous development more than 800 ml, and another version 1 liter. Via an intake pipe 5 and a suction pump 6, water can be taken from the water tank 1 and led to the steam generator 2. After operation, remaining water in the steam generator 2 can be pumped back to the water tank 1 via a drain line 7 and a drain pump 8. In the steam generator 2, a heating coil 9 is arranged, which is supplied by the controller 4 when needed with power. If the water is brought to boil in the steam generator 2, then steam flows via a line 10 into the cooking chamber 3 and heats the food. Excess steam escapes through an opening 11. If the water level in the steam generator 2 drops below a certain limit, the controller 4 switches on the pump 6 during normal operation, so that water can flow from the water tank 1. For this purpose, a not shown level sensor is arranged in the steam generator 2.

Zur Regelung einer Temperatur Tg im Garraum ist ein Garraum-Temperatursensor 12 vorgesehen. Ferner ist ein Temperatursensor 18 vorgesehen, welcher die Temperatur Tx von ausstrƶmendem Dampf an der Ɩffnung 11 misst. Es zeigt sich, dass die Temperatur Tx ansteigt, sobald Dampf durch die Ɩffnung 11 auszutreten beginnt. Ein Dampfaustritt kann deshalb z.B. erkannt werden, indem die Temperatur Tx mit einem ersten Temperaturschwellwert T1 verglichen wird, wobei der erste Schwellwert beispielhaft einen Wert zwischen 30Ā° und 50 Ā°Celsius aufweist. Ist Tx>T1, so tritt Dampf durch die Ɩffnung 11 aus, d.h. es ist ein gewisses Dampfniveau um Garraum 1 erreicht, bei dem entweder ausreichend Dampf vorhanden sein mĆ¼sste, um einen Mikrowellenbetrieb energieeffizienter, d.h. mit weniger Leistung und/oder mit besserem Garresultat durchfĆ¼hren zu kƶnnen als ohne Dampf.To regulate a temperature Tg in the cooking chamber, a cooking chamber temperature sensor 12 is provided. Furthermore, a temperature sensor 18 is provided, which measures the temperature Tx of outflowing steam at the opening 11. It turns out that the temperature Tx increases as soon as steam begins to exit through the opening 11. A steam outlet can therefore be detected, for example, by comparing the temperature Tx with a first temperature threshold T1, wherein the first threshold value has, for example, a value between 30 Ā° and 50 Ā° Celsius. If Tx> T1, steam exits through the opening 11, ie a certain level of steam is reached around the cooking space 1, at which either sufficient steam would have to be present, to perform a microwave operation more energy efficient, ie with less power and / or better Garresultat than without steam.

In einer zweiten Betriebsweise wird eine Austritt von Dampf ebenfalls mit Hilfe des Temperatursensors 18 erkannt wobei die gemessene Temperatur Tx mit einem zweiten Schwellwert T2 mit einem beispielhaften Wert zwischen 50Ā° und 70 Ā°Celsius verglichen wird. Ist Tx>T2, so tritt verstƤrkt Dampf durch die Ɩffnung 11 aus, d.h. das Dampfgaren im Garraum 1 ist in vollem Gange und kƶnnte durch Beigabe von Mikrowellen sogar noch beschleunigt werden. Insofern wird hier bei Ɯberschreiten des zweiten Schwellwerts T2, d.h. bei Tx>T2, wird der Mikrowellengenerator eingeschaltet.In a second mode of operation, an exit of steam is also detected with the aid of the temperature sensor 18, wherein the measured temperature Tx is compared with a second threshold T2 having an exemplary value between 50 Ā° and 70 Ā° Celsius. If Tx> T2, vapor is increasingly exiting through the opening 11, i. the steam cooking in the cooking chamber 1 is in full swing and could even be accelerated by the addition of microwaves. In this respect, if the second threshold value T2, i. at Tx> T2, the microwave generator is turned on.

Weiter besitzt das GargerƤt eine Eingabeeinheit 13, an welcher der Benutzer die gewĆ¼nschte Solltemperatur Tg des Garraums 3 einstellen kann. Ferner kƶnnen am Garraum 3 eine Deckenheizung 20 und eine Bodenheizung 21 angeordnet, mit denen die Decke bzw. der Boden des Garraums 3 geheizt werden kann. Alternativ oder zusƤtzlich hierzu kƶnnen auch seitlich angeordnete Heizungen zum Heizen der SeitenwƤnde vorgesehen sein. Die Heizung 19 und optional die Deckenheizung 20 und die Bodenheizung 21 kƶnnen unter anderem dazu verwendet werden, den Garraum vor dem Dampfgaren vorzuheizen. Dabei wird der Garraum 3 auf eine Vorheiztemperatur Tgv vorgeheizt, bevor Dampf zugefĆ¼hrt wird. Diese Vorheiztemperatur liegt vorzugsweise 1 bis 10Ā°C, insbesondere ca. 5Ā°C unter der Solltemperatur Tgs. Dampf wird erst in den Garraum gefĆ¼hrt, wenn die Vorheiztemperatur Tgv erreicht ist. Dadurch kann vermieden werden, dass zuviel Kondensat ausfƤllt oder dass eine Verpuffung des Dampfs stattfindet.Furthermore, the cooking appliance has an input unit 13, at which the user can set the desired setpoint temperature Tg of the cooking chamber 3. Furthermore, a ceiling heating 20 and a floor heating 21 can be arranged on the cooking chamber 3, with which the ceiling or the bottom of the cooking chamber 3 can be heated. Alternatively or in addition thereto, laterally arranged heaters may be provided for heating the side walls. The heater 19 and optionally the ceiling heater 20 and the floor heating 21 can be used, among other things, to pre-heat the cooking chamber before steaming. In this case, the cooking chamber 3 is preheated to a preheating temperature Tgv before steam is supplied. This preheating temperature is preferably 1 to 10 Ā° C, in particular about 5 Ā° C below the target temperature Tgs. Steam is only conducted into the oven when the preheat Tgv is reached. This can avoid that too much condensate precipitates or that a deflagration of the steam takes place.

WƤhrend in der vorliegenden Anmeldung bevorzugte AusfĆ¼hrungen der Erfindung beschrieben sind, ist klar darauf hinzuweisen, dass die Erfindung nicht auf diese beschrƤnkt ist und in auch anderer Weise innerhalb des Umfangs der folgenden AnsprĆ¼che ausgefĆ¼hrt werden kann.While preferred embodiments of the invention are described in the present application, it should be clearly understood that the invention is not limited thereto and in any other way within the scope of the following claims.

Claims (13)

  1. Cooking device for cooking food, comprising
    a cooking chamber (1, 3) for receiving the food,
    a steam generator (2, 4) for supplying steam into the cooking chamber (1, 3),
    a sensor for measuring a parameter of steam escaping from the cooking chamber (1, 3) through an opening (11, 14), which opening (11, 14) in the cooking chamber (1, 3) allows steam to escape from the cooking chamber (1, 3), or a sensor for measuring a parameter of steam in the cooking chamber (1, 3),
    a microwave generator (31) for heating the food received inside the cooking chamber (1, 3),
    characterized in that a control unit (24) is provided for controlling the microwave generator (31), wherein previously steam was introduced into the cooking chamber (1, 3), dependent on the parameter measured by the sensor.
  2. Cooking device of claim 1,
    wherein the sensor is a temperature sensor (18) for measuring the temperature (Tx) of steam escaping through the opening (11, 14).
  3. Cooking device of claim 1 or claim 2,
    wherein the sensor is arranged in an extension of the opening (11, 14) directed towards the outside.
  4. Cooking device according to claim 1,
    wherein the sensor is a humidity sensor for measuring humidity in the cooking chamber (1, 3).
  5. Cooking device according to any one of the preceding claims,
    wherein the control unit (24) is adapted to control the microwave generator (31) dependent on exceeding and / or being lower than a threshold (T1, T2) by the measured parameter.
  6. Cooking device according to any one of the preceding claims,
    wherein the control unit (24) is adapted to switch on and / or switch off the microwave generator (31) dependent on the measured parameter, and / or
    wherein the control unit (24) is adapted to increase and / or decrease a power of the microwave generator (31) dependent on the measured parameter.
  7. Cooking device according to any one of the preceding claims,
    wherein the control unit (24) is adapted to control the microwave generator (31) dependent on the measured parameter in case the steam generator (2, 4) is activated.
  8. Cooking device according to any one of the preceding claims,
    comprising a water container (1) for receiving water to be converted into steam by the steam generator (2, 4), which water container (1) has a volume of more than 500 ml, and wherein the water container (1) preferably has a volume of more than 800 ml.
  9. Cooking device according to any one of the preceding claims,
    comprising a selector switch for selecting one of several cooking programmes,
    wherein the control unit (24) is adapted to control the microwave generator (31) solely by the measured parameter in case a selection of an associated cooking programme made by the selection switch is identified.
  10. Method for operating a cooking device according to any of the preceding claims, for cooking food,
    wherein steam generated by the steam generator (2, 4) is supplied into the cooking chamber (1, 3),
    wherein a parameter of steam escaping from the cooking chamber (1, 3) through the opening (11, 14) or a parameter of steam in the cooking chamber (1, 3) is measured, and
    wherein the microwave generator (31) is controlled dependent on the measured parameter.
  11. Method according to claim 10,
    wherein the microwave generator (31) is solely controlled depending on the measured parameter in case the steam generator (2, 4) is activated.
  12. Method according to claims 10 to 11,
    wherein the microwave generator (31) is switched on when the measured parameter exceeds a first threshold (T1, T2).
  13. Method according to any one of the preceding claims 10 to 12,
    wherein the microwave generator (31) is switched off when the measured parameter exceeds a second threshold (T2).
EP11010244.9A 2011-12-28 2011-12-28 Combination cooking device Active EP2445311B1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DK11010244.9T DK2445311T3 (en) 2011-12-28 2011-12-28 Combination preparation device
PL11010244T PL2445311T3 (en) 2011-12-28 2011-12-28 Combination cooking device
SI201131264T SI2445311T1 (en) 2011-12-28 2011-12-28 Combination cooking device
EP11010244.9A EP2445311B1 (en) 2011-12-28 2011-12-28 Combination cooking device
AU2012268875A AU2012268875B2 (en) 2011-12-28 2012-12-24 Multi function cooking device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP11010244.9A EP2445311B1 (en) 2011-12-28 2011-12-28 Combination cooking device

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EP2445311A2 EP2445311A2 (en) 2012-04-25
EP2445311A3 EP2445311A3 (en) 2012-06-06
EP2445311B1 true EP2445311B1 (en) 2017-05-31

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CH705766A2 (en) * 2013-03-07 2013-04-30 V Zug Ag Baking oven has climate sensor and temperature sensor that are arranged in and outside of opening of cooking space, such that heating capacity of heating elements is lowered and cooking space temperature falls below target temperature
WO2021183068A1 (en) * 2020-03-13 2021-09-16 Femas Metal San. Ve Tic. A.S. An oven with a temperature control unit
CN112586531B (en) * 2020-12-14 2022-04-15 å¹æäøœē¾Žēš„åŽØęˆæē”µå™Øåˆ¶é€ ęœ‰é™å…¬åø Control method of cooking appliance, cooking appliance and readable storage medium

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JP2006284013A (en) * 2005-03-31 2006-10-19 Sharp Corp Heating cooking device
JP4311688B2 (en) * 2006-11-02 2009-08-12 ć‚·ćƒ£ćƒ¼ćƒ—ę Ŗ式会ē¤¾ Exhaust steam diluting apparatus and cooking device equipped with the same
JP4439575B2 (en) * 2008-08-29 2010-03-24 ć‚·ćƒ£ćƒ¼ćƒ—ę Ŗ式会ē¤¾ Cooker

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EP2445311A2 (en) 2012-04-25
AU2012268875B2 (en) 2017-05-04
AU2012268875A1 (en) 2013-07-18
SI2445311T1 (en) 2017-10-30
DK2445311T3 (en) 2017-07-31
PL2445311T3 (en) 2017-10-31

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