DE4217943A1 - Roasting of microwave oven - has a display to show remains cooking time and time when final core temp. will be achieved - Google Patents

Roasting of microwave oven - has a display to show remains cooking time and time when final core temp. will be achieved

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Publication number
DE4217943A1
DE4217943A1 DE19924217943 DE4217943A DE4217943A1 DE 4217943 A1 DE4217943 A1 DE 4217943A1 DE 19924217943 DE19924217943 DE 19924217943 DE 4217943 A DE4217943 A DE 4217943A DE 4217943 A1 DE4217943 A1 DE 4217943A1
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DE
Germany
Prior art keywords
time
interval
core temperature
temp
cooking time
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.)
Ceased
Application number
DE19924217943
Other languages
German (de)
Inventor
Thomas Dr Kruempelmann
Helmut Dipl Ing Rothenbacher
Ulrich Dr Sillmen
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.)
Miele und Cie KG
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Miele und Cie KG
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 Miele und Cie KG filed Critical Miele und Cie KG
Priority to DE19924217943 priority Critical patent/DE4217943A1/en
Publication of DE4217943A1 publication Critical patent/DE4217943A1/en
Ceased legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/6447—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors
    • H05B6/645—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature sensors
    • H05B6/6452—Method of operation or details of the microwave heating apparatus related to the use of detectors or sensors using temperature sensors the sensors being in contact with the heated product
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/087—Arrangement or mounting of control or safety devices of electric circuits regulating heat
    • 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
    • H05B6/66—Circuits

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)

Abstract

Roasting oven or microwave oven, with a thermal probe to determine the temp. of the food to be cooked and a heating control and monitoring circuit, has a display to indicate the temp. control operation for cooking as set by the computer circuit according to the measured core temp. during cooking, to give the computed remaining cooking time and the time when the final core temp. will be achieved. The computer circuit can determine the time intervals needed for a given core temp. interval. The measured value pairs, for time and core temp. intervals, are stored in memory for comparison to give the remaining cooking time. The remaining cooking time is continuously renewed for display of the actual computed time to achieve the final core temp. The core temp. interval has a fixed lower limit, and the upper limit is formed by the actual core temp. value. The lower limit for the core temp. interval is more than 300 deg. C. and the min. interval value is 10K. The core temp. interval has a fixed length, and the upper interval limit is affected by the actual measured core temp. The remaining cooking time is computed arithmetically from the core temp. interval calculations. USE/ADVANTAGE - The oven control is for the cooking time to be set and operated for correct cooking. The system gives the user information on the cooking time remaining when the oven is working.

Description

Die Erfindung betrifft einen Backofen oder Mikrowellenofen mit einer Temperatursonde zur Erfassung der Temperatur des zu garenden Guts und einer Steuer- und Überwachungsschaltung zur Steuerung der Heizenergie entsprechend einem Kochprogramm und zur Abschaltung der Heizenergie bei Erreichen einer vom Benutzer eingestellten Endkerntemperatur.The invention relates to an oven or microwave oven with a Temperature probe for recording the temperature of the food to be cooked and one Control and monitoring circuit for controlling the heating energy accordingly a cooking program and to switch off the heating energy when one is reached End core temperature set by the user.

Es ist bei Backöfen und Mikrowellenöfen bekannt, den Garprozeß durch Eingabe eines Abschaltkriteriums automatisch zu beenden. Bei Öfen mit einer Zeitschaltuhr muß zu Beginn des Bratvorgangs vom Benutzer eine Bratzeit eingegeben werden, nach deren Ablauf die Heizenergie selbsttätig abgeschaltet wird. Bei diesem Verfahren ist jedoch nicht sicher, daß der Braten nach Ablauf der Zeit den gewünschten Garzustand besitzt. Die Abschätzung der Zeit ist nämlich mit einer großen Unsicherheit durch die Form des Bratens behaftet.It is known in ovens and microwave ovens to enter the cooking process of a switch-off criterion to end automatically. For ovens with a timer the user must enter a roasting time at the start of the roasting process, after which the heating energy is switched off automatically. With this However, the process is not certain that the roast will not reach has the desired cooking status. The estimate of the time is namely with a great uncertainty due to the shape of the roast.

Es ist weiterhin bei Backöfen bekannt, mit Hilfe einer Temperatursonde die Kerntemperatur eines Bratens zu messen und als Abschaltkriterium eine vom Benutzer einzugebende Endkerntemperatur zu verwenden. Hierbei ist zwar die Kerntemperatur zum Ende des Bratvorgangs bekannt, jedoch nicht das zeitliche Ende des gesamten Bratprozesses.It is also known in ovens, with the help of a temperature probe To measure the core temperature of a roast and as a switch-off criterion one from End core temperature to be entered by the user. Here is the Core temperature known at the end of the roasting process, but not the time End of the entire roasting process.

Aufgabe der Erfindung ist es daher, einen gattungsgemäßen Backofen oder Mikrowellenofen zu schaffen, bei welchem dem Benutzer Informationen über die Restgardauer zur Verfügung stehen.The object of the invention is therefore a generic oven or To create a microwave oven in which the user information about the The remaining cooking time is available.

Erfindungsgemäß wird diese Aufgabe durch einen Backofen oder Mikrowellenofen mit den Merkmalen des Anspruchs 1 gelöst. Vorteilhafte Ausgestaltungen ergeben sich aus den nachfolgenden Unteransprüchen. Ein Ausführungsbeispiel der Erfindung ist in den nachfolgenden Zeichnungen rein schematisch nachgestellt und wird nachstehend näher erläutert. Es zeigen: According to the invention, this object is achieved by an oven or microwave oven solved with the features of claim 1. Advantageous configurations result resulting from the following subclaims. An embodiment of the The invention is shown purely schematically in the following drawings and is explained in more detail below. Show it:  

Fig. 1 die Frontansicht eines Backofens (1); Figure 1 is a front view of an oven ( 1 ).

Fig. 2 den Schaltungsaufbau des Backofens (1) als Blockschaltbild; Figure 2 shows the circuit structure of the oven ( 1 ) as a block diagram.

Fig. 3 und 4 ein Zeitdiagramm der von der Rechnerschaltung ermittelten Größen. FIGS. 3 and 4 is a timing diagram of the determined by the calculation circuit sizes.

Der in Fig. 1 dargestellte Backofen (1) besitzt eine beheizbare Backmuffel (2) zur Aufnahme von Gargut (3). In einem Bedienfeld (4) ist ein Funktionswahlschalter (5), ein Temperaturwahlschalter (6) und eine Schaltuhr angeordnet.The oven ( 1 ) shown in Fig. 1 has a heatable baking muffle ( 2 ) for receiving food ( 3 ). A function selector switch ( 5 ), a temperature selector switch ( 6 ) and a time switch are arranged in a control panel ( 4 ).

Mit dem Funktionswahlschalter (5) können Funktionen wie z. B. Ober-/Unterhitze gewählt werden, der Temperaturwahlschalter (6) dient zum Einstellen von Backmuffeltemperaturen.With the function selector switch ( 5 ) functions such. B. Top / bottom heat can be selected, the temperature selector switch ( 6 ) is used to set the baking muffle temperatures.

Die Schaltuhr (7) dient zum Einstellen eines automatischen Backvorgangs und besteht aus einem Anzeigefeld (8), Druckschaltern (9) und einem Impulsgeber (10).The time switch ( 7 ) is used to set an automatic baking process and consists of a display panel ( 8 ), pressure switches ( 9 ) and a pulse generator ( 10 ).

Mit den Druckschaltern (9) sind folgende Funktionen zur Automatisierung eines Back-/Bratvorgangs wählbar:The following functions for automating a baking / roasting process can be selected using the pressure switches ( 9 ):

  • - zeitgesteuertes Garen;- timed cooking;
  • - temperaturgesteuertes Garen.- temperature controlled cooking.

Diesen beiden Funktionen wird durch den Impulsgeber (10) ein Endwert, und zwar eine Zeit (tKend) oder eine Endkerntemperatur (TKend) zugeordnet, bei dessen Erreichen der Back-/Bratvorgang beendet wird. Bei temperaturgesteuertem Garen wird eine die Kerntemperatur (T) erfassende Temperatursonde (11) in das Gargut gesteckt.These two functions are assigned a final value by the pulse generator ( 10 ), namely a time (t Kend ) or a final core temperature (T Kend ), when the baking / roasting process is ended. In the case of temperature-controlled cooking, a temperature probe ( 11 ) measuring the core temperature (T) is inserted into the food to be cooked.

Fig. 2 zeigt den Schaltungsaufbau des Backofens (1) in Blockschaltbilddarstellung. Der mit der Schaltuhr (7) eingegebene Endkerntemperaturwert (TKend) wird mit den durch die Temperatursonde (11) gemessenen aktuellen Kerntemperaturwerten (T) in einer Überwachungsschaltung (12) verglichen. Bei Übereinstimmung der beiden Signale gibt diese ein Abschaltsignal an die Steuerschaltung (13) ab, die dann ihrerseits die Stromzufuhr zu den Heizkörpern (14) des Backofens (1) unterbricht. Fig. 2 shows the circuit structure of the oven ( 1 ) in a block diagram representation. The final core temperature value (T Kend ) entered with the timer ( 7 ) is compared with the current core temperature values (T) measured by the temperature probe ( 11 ) in a monitoring circuit ( 12 ). If the two signals match, the latter outputs a switch-off signal to the control circuit ( 13 ), which in turn interrupts the power supply to the heating elements ( 14 ) of the oven ( 1 ).

Der Endkerntemperaturwert (TKend) und die aktuellen Kerntemperaturwerte (T) werden von einer Rechnerschaltung (14) zur Berechnung der Restgardauer verarbeitet. Diese wird dann im Anzeigefeld (7) signalisiert.The final core temperature value (T Kend ) and the current core temperature values (T) are processed by a computer circuit ( 14 ) for calculating the remaining cooking time. This is then signaled in the display field ( 7 ).

In den Fig. 3 und 4 sind die Programmablaufpläne von zwei Verfahren zur Berechnung der Restgardauer dargestellt. In beiden Verfahren wird nach dem Überschreiten einer Startbedingung, beispielsweise bei Erreichen einer Starttemperatur TStart, vorzugsweise 30°C, das Zeitintervall t gemessen, das zum Durchlaufen eines Kerntemperaturintervalls T benötigt wird. In Abhängigkeit von diesen beiden Parametern wird dann die Restgardauer tend bzw. die Zeit bis zum Erreichen der Endkerntemperatur TKend berechnet. Dies erfolgt durch einen Vergleich dieser Parameter mit abgespeicherten Werten, wobei jeweils einem Wertepaar, bestehend aus einem Zeitintervall (t) und einem Kerntemperaturintervall (T), ein Restgardauerwert (tend) zugeordnet ist. Die Bestimmung der Restgardauer (tend) erfolgt fortlaufend neu, bis die eingestellte Endkerntemperatur (Tkend) erreicht ist. Somit wird die Voraussage laufend aktualisiert und zum Ende des Bratvorgangs immer genauer.In FIGS. 3 and 4, flowcharts of two methods are presented for computing the remaining cooking time. In both methods, after a start condition has been exceeded, for example when a start temperature T Start has been reached , preferably 30 ° C., the time interval t that is required to run through a core temperature interval T is measured. The remaining cooking time t end or the time until the final core temperature T Kend is reached is then calculated as a function of these two parameters. This is done by comparing these parameters with stored values, with a pair of values consisting of a time interval (t) and a core temperature interval (T) being assigned a residual cooking duration value (t end ). The remaining cooking time (t end ) is continuously determined anew until the set final core temperature (T kend ) is reached. This means that the forecast is continuously updated and always more accurate at the end of the roasting process.

Bei dem Verfahren gemäß Fig. 3 wird als untere Intervallgrenze die Starttemperatur TStart festgelegt. Somit bildet auch die Zeit t0, bei welcher diese Temperatur erreicht wird, die Untergrenze des Zeitintervalls. Die Obergrenze des Temperaturintervalls wird durch die jeweilige Kerntemperatur T bestimmt, d. h., die Kerntemperatur-Intervallänge ist fließend.In the method according to FIG. 3, the starting temperature T set as the lower interval limit start. Thus the time t 0 at which this temperature is reached also forms the lower limit of the time interval. The upper limit of the temperature interval is determined by the respective core temperature T, ie the core temperature interval length is fluid.

Bei dem Verfahren gemäß Fig. 4 wird die Zeit für den Durchlauf eines festen Kerntemperaturintervalls gemessen, welches dem Kerntemperaturbereich T von 10K entspricht. Hierzu müssen die unteren Intervallgrenzen von Zeit (tS) und Kerntemperatur (TS) jeweils gespeichert werden. Der Vorteil dieses Verfahrens besteht darin, daß Änderungen in den Garbedingungen, beispielsweise der Backmuffeltemperatur nicht in die Berechnung der Restgardauer (tend) eingehen.In the method according to FIG. 4, the time for the passage of a fixed core temperature interval is measured, which corresponds to the core temperature T of 10K. To do this, the lower interval limits of time (t S ) and core temperature (T S ) must be saved. The advantage of this method is that changes in the cooking conditions, for example the baking oven temperature, are not included in the calculation of the remaining cooking time (t end ).

In einem anderen, in den Zeichnungen nicht dargestellten Verfahren wird die Restgardauer (tend) nach beiden Verfahren gemäß Fig. 3 und 4 ermittelt und die beiden hierdurch gewonnenen Zeiten anschließend gemittelt und angezeigt.In another method, not shown in the drawings, the remaining cooking time (t end ) is determined by both methods according to FIGS. 3 and 4 and the two times obtained thereby are then averaged and displayed.

Claims (7)

1. Backofen oder Mikrowellenofen mit einer Temperatursonde zur Erfassung der Temperatur des zu garenden Guts und einer Steuer- und Überwachungsschaltung zur Steuerung der Heizenergie und zur Abschaltung der Heizenergie bei Erreichen einer vom Benutzer eingestellten Endkerntemperatur, gekennzeichnet durch eine Anzeigevorrichtung, welche in der Betriebsart temperaturgesteuertes Garen die durch eine Rechnerschaltung (15) in Abhängigkeit von während des Garprozesses gemessenen Kerntemperaturwerten (T) berechnete Restgardauer (tend) bzw. den Zeitpunkt, an dem die Endkerntemperatur (TKend) erreicht wird, anzeigt.1. Oven or microwave oven with a temperature probe for recording the temperature of the food to be cooked and a control and monitoring circuit for controlling the heating energy and for switching off the heating energy when a final core temperature set by the user is reached, characterized by a display device which operates in the temperature-controlled cooking mode the residual cooking time (t end ) calculated by a computer circuit ( 15 ) as a function of core temperature values (T) measured during the cooking process or the time at which the final core temperature (T Kend ) is reached. 2. Verfahren zur Anzeige der Restgardauer in einem Backofen oder Mikrowellenofen gemäß Anspruch 1, dadurch gekennzeichnet, daß die Rechnerschaltung (15) Mittel zur Bestimmung des Zeitintervalls (t) besitzt, welches notwendig ist, um ein bestimmtes Kerntemperaturintervall (T) zu durchlaufen, und daß sie die gemessenen Wertepaare (t, T) mit in einem Speicher abgespeicherten Werten vergleicht und anhand dieses Vergleichs die Restgardauer (tend) bestimmt.2. A method for displaying the remaining cooking time in an oven or microwave oven according to claim 1, characterized in that the computer circuit ( 15 ) has means for determining the time interval (t) which is necessary to go through a certain core temperature interval (T), and that it compares the measured pairs of values (t, T) with values stored in a memory and uses this comparison to determine the remaining cooking time (t end ). 3. Verfahren nach Anspruch 2, dadurch gekennzeichnet, daß die Berechnung der Restgardauer (tend) fortlaufend neu erfolgt und jeweils der aktuell berechnete Zeitpunkt des Erreichens der Endkerntemperatur angezeigt wird.3. The method according to claim 2, characterized in that the calculation of the remaining cooking time (t end ) is continuously carried out anew and in each case the currently calculated time of reaching the final core temperature is displayed. 4. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß das Kerntemperaturintervall (T) eine feste Untergrenze besitzt und daß die obere Intervallgrenze durch den aktuellen Kerntemperaturwert gebildet wird. 4. The method according to claim 3, characterized, that the core temperature interval (T) has a fixed lower limit and that the upper interval limit is formed by the current core temperature value.   5. Verfahren nach Anspruch 4, dadurch gekennzeichnet, daß die Untergrenze des Kerntemperaturintervalls (T) größer als 300 Celsius ist und die Mindestintervallgröße 10K beträgt.5. The method according to claim 4, characterized, that the lower limit of the core temperature interval (T) is greater than 300 Celsius and the minimum interval size is 10K. 6. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß das Kerntemperaturintervall (T) eine feste Länge besitzt, wobei die Obergrenze des Intervalls durch die augenblicklich gemessene Kerntemperatur (t) geprägt ist.6. The method according to claim 3, characterized, that the core temperature interval (T) has a fixed length, the Upper limit of the interval due to the currently measured core temperature (t) is shaped. 7. Verfahren nach Anspruch 3, dadurch gekennzeichnet, daß die Restgardauer (tend) aus dem arithmetischen Mittel der gemäß der Verfahren nach den Ansprüchen 4 und 6 berechneten Zeiten ermittelt wird.7. The method according to claim 3, characterized in that the remaining cooking time (t end ) is determined from the arithmetic mean of the times calculated according to the method according to claims 4 and 6.
DE19924217943 1992-05-30 1992-05-30 Roasting of microwave oven - has a display to show remains cooking time and time when final core temp. will be achieved Ceased DE4217943A1 (en)

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0723115A2 (en) * 1995-01-23 1996-07-24 V-Zug AG Oven and process for cooking meat products
DE102004008335A1 (en) * 2004-02-20 2005-09-15 Electrolux Home Products Corporation N.V. Domestic appliance or the like, which is controllable and / or regulated by means of a computer program
DE102005016766A1 (en) * 2005-04-11 2006-10-12 Miwe Michael Wenz Gmbh Cooking apparatus comprising an oven and a conveyor comprises a device for monitoring the current supply to the oven's heater and/or the conveyor
DE102007040316A1 (en) 2007-08-24 2009-02-26 Rational Ag Method for indicating a remaining cooking time
EP2136604A1 (en) * 2008-06-20 2009-12-23 Topinox Sarl Method for adjusting microwave output in a microwave cooking device depending on the measured core temperature and cooking device
EP2078899A3 (en) * 2008-01-10 2010-03-17 Rational AG Method for guiding a cooking program and cooking device
EP1867926B1 (en) * 2006-06-13 2010-08-11 Rational AG Cooking device with status monitoring of the food products
CN103234228A (en) * 2006-11-24 2013-08-07 伊莱克斯家用产品股份有限公司 A method and an apparatus for determining the residual time until a cooking process of a foodstuff has been finished
DE102012014174A1 (en) * 2012-07-16 2014-01-16 Rational Aktiengesellschaft Method for displaying parameters of a cooking process and display device for a cooking appliance
WO2019037962A1 (en) 2017-08-23 2019-02-28 BSH Hausgeräte GmbH Domestic cooking appliance

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Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0723115A3 (en) * 1995-01-23 1997-04-16 V Zug Ag Oven and process for cooking meat products
EP0723115A2 (en) * 1995-01-23 1996-07-24 V-Zug AG Oven and process for cooking meat products
DE102004008335A1 (en) * 2004-02-20 2005-09-15 Electrolux Home Products Corporation N.V. Domestic appliance or the like, which is controllable and / or regulated by means of a computer program
DE102005016766A1 (en) * 2005-04-11 2006-10-12 Miwe Michael Wenz Gmbh Cooking apparatus comprising an oven and a conveyor comprises a device for monitoring the current supply to the oven's heater and/or the conveyor
EP1867926B1 (en) * 2006-06-13 2010-08-11 Rational AG Cooking device with status monitoring of the food products
CN103234228A (en) * 2006-11-24 2013-08-07 伊莱克斯家用产品股份有限公司 A method and an apparatus for determining the residual time until a cooking process of a foodstuff has been finished
DE102007040316A1 (en) 2007-08-24 2009-02-26 Rational Ag Method for indicating a remaining cooking time
WO2009026887A2 (en) 2007-08-24 2009-03-05 Rational Ag Method for displaying the residual time until a cooking process has been finished
WO2009026862A1 (en) * 2007-08-24 2009-03-05 Rational Ag Method for displaying the residual time until a cooking process has been finished
WO2009026887A3 (en) * 2007-08-24 2009-05-07 Rational Ag Method for displaying the residual time until a cooking process has been finished
EP2078899A3 (en) * 2008-01-10 2010-03-17 Rational AG Method for guiding a cooking program and cooking device
EP2136604A1 (en) * 2008-06-20 2009-12-23 Topinox Sarl Method for adjusting microwave output in a microwave cooking device depending on the measured core temperature and cooking device
DE102012014174A1 (en) * 2012-07-16 2014-01-16 Rational Aktiengesellschaft Method for displaying parameters of a cooking process and display device for a cooking appliance
EP2872830B1 (en) 2012-07-16 2016-05-25 Rational Aktiengesellschaft Method for displaying parameters of a cooking process, and display device for a cooking appliance
US10969111B2 (en) 2012-07-16 2021-04-06 Rational Aktiengesellschaft Method for displaying parameters of a cooking process and display device for a cooking appliance
WO2019037962A1 (en) 2017-08-23 2019-02-28 BSH Hausgeräte GmbH Domestic cooking appliance
DE102017214753A1 (en) 2017-08-23 2019-02-28 BSH Hausgeräte GmbH Household cooking appliance

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