EP0537796B1 - Cooking oven - Google Patents
Cooking oven Download PDFInfo
- Publication number
- EP0537796B1 EP0537796B1 EP92119683A EP92119683A EP0537796B1 EP 0537796 B1 EP0537796 B1 EP 0537796B1 EP 92119683 A EP92119683 A EP 92119683A EP 92119683 A EP92119683 A EP 92119683A EP 0537796 B1 EP0537796 B1 EP 0537796B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- oven
- microprocessor
- pyrolysis
- probe
- 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.)
- Expired - Lifetime
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
- 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
-
- 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
- F24C14/00—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning
- F24C14/02—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning pyrolytic type
Definitions
- the invention relates to a cooking oven, in particular of the pyrolysis cleaning type. It relates, more particularly, to a method of controlling the heating of such an oven during cleaning by pyrolysis.
- Furnaces of this type are described, for example, in French patents Nos. 2,365,927 and 2,588,641 in the name of the Applicant.
- the present invention provides a new method for controlling an oven as described above.
- the subject of the present invention is a method for controlling a pyrolysis cleaning oven as defined in claims 1 to 3.
- the probe is, for example, a platinum resistance probe whose accuracy is more or less 3 ° C for temperatures between 60 and 500 ° C.
- the probe and microprocessor which are used to control the various functions associated with cleaning by pyrolysis, are also used to control the usual operation of the oven, i.e., its operation for cooking. or heating.
- an electronic type temperature measurement probe associated with a microprocessor is not incompatible with the use of a type thermostat. electromechanical to control the interruption of electrical power supply to the resistors in the event of failure of the electronic circuit, in particular if an electronic switch, such as a triac, in series with a resistance is short-circuited.
- the baking oven 10 conventionally includes a vault (or grill) resistance 11 and a hearth resistance 12 making it possible to cook food placed on an intermediate shelf 13.
- Resistors 11 and 12 are supplied in parallel by the AC power sector. Resistor 11 is in series with a triac 15. Likewise, resistor 12 is in series with a triac 16.
- the conduction of the triacs 15 and 16 is controlled by a microprocessor 17.
- a microprocessor 17 For this purpose, an output 171 of the microprocessor 17 is connected to the trigger of the triac 15 via an interface circuit 18.
- an output 172 is connected to the trigger of the triac 16 via another interface circuit 19.
- microprocessor 17 has inputs 173, 174, 175, ... to which are applied binary signals representing addresses of programs in memory of the microprocessor 17.
- the output 171 controls the conduction of the triac 15 in such a way that at each alternation of the AC sector (at frequency 50Hz) the triac is conductive for a time chosen as a function of the power which it is desired to have delivered by the resistor 11. This fraction of the duration of each alternation during which the resistor 11 is supplied is determined by the program in the microprocessor 17.
- the programs of the microprocessor 17 control, by the output 172, the duration of conduction of the triac 16 at each alternation of the alternating current of the sector.
- the inputs 173, 174 and 175, associated with keys, respectively 20, 21, and 22, allow preprogrammed operations, as will be seen below.
- the microprocessor has an input 177 to which is applied, via an interface circuit 30, an electrical signal supplied by a thermocouple probe 31 which represents the temperature inside the enclosure of the oven 10
- the probe 31 is arranged inside this enclosure.
- An output 179 of the microprocessor controls, via an interface circuit 331, a latch 34 for automatically locking or unlocking the door (not shown) for access to the oven. The circumstances under which such locking occurs will be described later.
- the microprocessor has two other inputs 1710 and 1711.
- the input 1710 is connected to a variable resistor 25, or a coding wheel, via an interface circuit 251.
- the microprocessor converts the value of the adjustable resistor 25 into a conduction time of the triac 15 at each alternation of the sector.
- the value of the resistor 25 is determined by the user, for example with the aid of a rotary button or of a cursor with linear displacement, as a function of the power supply that he desires for the resistor 11.
- the input 1711 of the microprocessor 17 is connected to a variable resistor 26 (or coding wheel) via another interface circuit 261.
- Resistance 26 plays, with respect to triac 16, the same role as that played by resistance 25 with respect to triac 15.
- the commands on the inputs 173, 174 and 175, which represent preprogrammed commands, have priority over the commands on the inputs 1710 and 1711.
- FIG. 3 shows a diagram corresponding to the program associated with the input 173 which is intended to control cleaning by pyrolysis.
- the time t is plotted on the abscissa and the temperature T is plotted on the ordinate.
- Diagram 50 therefore represents the variation of temperature T in degrees C as a function of time t.
- the power supplied to the resistors 11 and 12 is maximum, that is to say that the triacs 15 and 16 are, during each alternation in the sector, permanently conductive. From this temperature of 180 ° C. fumes and carbon monoxide CO may be released due to incomplete combustion, and this all the more so at this temperature the catalyst (not shown) generally provided in the cooking chamber ceiling, is not yet active. Under these conditions, once the temperature in the enclosure has exceeded 180 ° C (at time t1), the microprocessor controls a reduction in the power supplied to the resistors, in particular to the sole resistor 12, as described in the French patent. No. 2,588,641 in the name of the Claimant. In this way, as long as the catalyst is not primed, the organic waste which is usually found in the lower part of the oven, is not burnt.
- the program again controls the power supply at full power of the resistors 11 and 12 in order to quickly reach the temperature of 500 ° C. From this temperature of 250 ° C, the catalyst is active and there are therefore practically no more CO and smoke emissions.
- the microprocessor delivers when the temperature of 350 ° C has been reached (at time t3), a signal on its output 179 which actuates the latch 34 to prevent the opening of the oven access door.
- This lock 34 remains closed as long as the temperature is above 350 ° C.
- the power supplied to the resistors decreases significantly in order to limit the risk of exceeding this temperature of 500 ° C .
- the microprocessor then controls, for a time determined by its program, the maintenance of the supply of the resistors 11 and 12 so that the temperature remains at the value of 500 ° C. The operation is stopped automatically, this stop also being controlled by the microprocessor 17.
- the probe 31 also intervenes during the normal operation of the oven, that is to say when recourse is made to specific cooking programs in the memory of the microprocessor and which are triggered by actuation of the keys 21, 22, etc., or when the potentiometers 25 and 26 are directly controlled, the power supplied to the heating resistors 11 and 12.
Abstract
Description
L'invention est relative à un four de cuisson, notamment du type à nettoyage par pyrolyse. Elle concerne, plus particulièrement, un procédé de commande du chauffage d'un tel four lors du nettoyage par pyrolyse.The invention relates to a cooking oven, in particular of the pyrolysis cleaning type. It relates, more particularly, to a method of controlling the heating of such an oven during cleaning by pyrolysis.
Les fours de cuisson à chauffage par résistances électriques comportent souvent une position de nettoyage par pyrolyse. Ce nettoyage consiste à chauffer l'intérieur de l'enceinte du four, à l'aide des résistances électriques de cuisson, à une température de l'ordre de 500°C afin de brûler les résidus organiques sur les parois sans cependant dégrader l'émail qui recouvre habituellement de telles parois.Cooking ovens heated by electrical resistances often have a pyrolysis cleaning position. This cleaning consists in heating the interior of the oven enclosure, using the electric cooking resistors, to a temperature of the order of 500 ° C. in order to burn the organic residues on the walls without, however, degrading the enamel which usually covers such walls.
Pour réaliser la pyrolyse, on utilise souvent un catalyseur. Des fours de ce type sont décrits, par exemple, dans les brevets français N°2 365 927 et 2 588 641 au nom de la Demanderesse.To carry out the pyrolysis, a catalyst is often used. Furnaces of this type are described, for example, in French patents Nos. 2,365,927 and 2,588,641 in the name of the Applicant.
Les fours à nettoyage par pyrolyse sont jusqu'à présent assez onéreux notamment parce que le contrôle du chauffage du four nécessite des sondes ou thermostats électromécaniques relativement complexes. Le plus souvent, ces thermostats électromécaniques présentent trois positions qui correspondent à trois seuils de montée en température :
- le premier seuil est la température de 250°C au-dessus de laquelle le catalyseur devient actif et à partir de laquelle on alimente les résistances à leur puissance maximum, alors qu'au-dessous de cette température la puissance de chauffage doit être limitée afin de minimiser l'émission des fumées résultant d'une combuston incomplète en l'absence de catalyse.
- the first threshold is the temperature of 250 ° C above which the catalyst becomes active and from which the resistors are supplied at their maximum power, while below this temperature the heating power must be limited in order to to minimize the emission of smoke resulting from incomplete combustion in the absence of catalysis.
Le second seuil est la température de 340°C à partir de laquelle les normes imposent de ne plus autoriser l'ouverture de la porte du four ;
Le troisième et dernier seuil est la température de 480°C proche de la température maximum admissible et à partir de laquelle la puissance de chauffage doit être limitée afin de ne pas risquer de dépasser la température admissible de 500°C.The second threshold is the temperature of 340 ° C, above which standards require that the oven door should no longer be opened;
The third and last threshold is the temperature of 480 ° C close to the maximum admissible temperature and from which the heating power must be limited in order not to risk exceeding the admissible temperature of 500 ° C.
Pour simplifier la réalisation d'un tel four à nettoyage par pyrolyse, on a déjà proposé de munir le four d'une sonde délivrant un signal électrique représentant la température à l'intérieur de ce four et d'un microcontrôleur ou analogue pour commander la puissance électrique fournie aux résistances chauffantes, et de préférence, le verrouillage de la porte du four.To simplify the production of such a pyrolysis cleaning oven, it has already been proposed to provide the oven with a probe delivering an electrical signal representing the temperature inside this oven and with a microcontroller or the like for controlling the electrical power supplied to the heating resistors, and preferably the locking of the oven door.
La présente invention propose un nouveau procédé de commande d'un four tel que décrit ci-dessus.The present invention provides a new method for controlling an oven as described above.
En conséquence, la présente invention a pour objet un procédé de commande d'un four à nettoyage par pyrolyse tel que défini dans les revendications 1 à 3.Consequently, the subject of the present invention is a method for controlling a pyrolysis cleaning oven as defined in claims 1 to 3.
La sonde est, par exemple, une sonde à résistance au platine dont la précision est plus ou moins 3°C pour des températures comprises entre 60 et 500°C.The probe is, for example, a platinum resistance probe whose accuracy is more or less 3 ° C for temperatures between 60 and 500 ° C.
Dans le mode de réalisation préféré, la sonde et le microprocesseur, qui sont utilisés pour commander les diverses fonctions associées au nettoyage par pyrolyse, sont également utilisées pour commander le fonctionnement habituel du four, c'est-à-dire son fonctionnement pour la cuisson ou le chauffage.In the preferred embodiment, the probe and microprocessor, which are used to control the various functions associated with cleaning by pyrolysis, are also used to control the usual operation of the oven, i.e., its operation for cooking. or heating.
Il est à noter que l'utilisation d'une sonde de mesure de température de type électronique associée à un microprocesseur n'est pas incompatible avec l'utilisation d'un thermostat de type électromécanique pour commander l'interruption d'alimentation en énergie électrique des résistances en cas de défaillance du circuit électronique, notamment si un interrupteur électronique, tel qu'un triac, en série avec une résistance est en court-circuit.It should be noted that the use of an electronic type temperature measurement probe associated with a microprocessor is not incompatible with the use of a type thermostat. electromechanical to control the interruption of electrical power supply to the resistors in the event of failure of the electronic circuit, in particular if an electronic switch, such as a triac, in series with a resistance is short-circuited.
D'autres caractéristiques et avantages de l'invention apparaîtront avec la description de certains de ses modes de réalisation, celle-ci étant effectuées en se référant aux dessins ci-annexés sur lesquels :
- la figure 1 est un schéma simplifié d'un four de cuisson ;
- la figure 2 est un schéma électrique d'un four selon l'invention, et
- la figure 3 est un diagramme représentant la puissance de chauffage lors d'un nettoyage par pyrolyse.
- Figure 1 is a simplified diagram of a cooking oven;
- FIG. 2 is an electrical diagram of an oven according to the invention, and
- FIG. 3 is a diagram representing the heating power during cleaning by pyrolysis.
Dans l'exemple, le four de cuisson 10 (figure 1) comporte de façon classique une résistance de voûte (ou grill) 11 et une résistance de sole 12 permettant de cuire des aliments disposés sur une étagère intermédiaire 13.In the example, the baking oven 10 (FIG. 1) conventionally includes a vault (or grill)
On prévoit, dans cet exemple, une seule résistance de voûte 11 et une seule résistance de sole 12 (figure 2).In this example, only one
Les résistances 11 et 12 sont alimentées en parallèle par le secteur d'alimentation en courant alternatif. La résistance 11 est en série avec un triac 15. De même, la résistance 12 est en série avec un triac 16.
La conduction des triacs 15 et 16 est commandée par un microprocesseur 17. A cet effet, une sortie 17₁ du microprocesseur 17 est connectée à la gâchette du triac 15 par l'intermédiaire d'un circuit interface 18. De même, une sortie 17₂ est connectée à la gâchette du triac 16 par l'intermédiaire d'un autre circuit interface 19.The conduction of the
Par ailleurs, le microprocesseur 17 comporte des entrées 17₃, 17₄, 17₅, ... sur lesquelles sont appliqués des signaux binaires représentant des adresses de programmes en mémoire du microprocesseur 17.Furthermore, the
La sortie 17₁ commande la conduction du triac 15 de façon telle qu'à chaque alternance du secteur alternatif (à fréquence 50Hz) le triac soit conducteur pendant un temps choisi en fonction de la puissance qu'on désire faire délivrer par la résistance 11. Cette fraction de la durée de chaque alternance pendant laquelle la résistance 11 est alimentée est déterminée par le programme dans le microprocesseur 17.The
De façon analogue, les programmes du microprocesseur 17 commandent, par la sortie 17₂, la durée de conduction du triac 16 à chaque alternance du courant alternatif du secteur.Similarly, the programs of the
Les entrées 17₃, 17₄ et 17₅, associées à des touches, respectivement 20, 21, et 22, permettent des fonctionnements préprogrammés, comme on le verra plus loin.The inputs 17₃, 17₄ and 17₅, associated with keys, respectively 20, 21, and 22, allow preprogrammed operations, as will be seen below.
Par ailleurs, le microprocesseur comporte une entrée 17₇ sur laquelle est appliqué, par l'intermédiaire d'un circuit interface 30, un signal électrique fourni par une sonde à thermocouple 31 qui représente la température à l'intérieur de l'enceinte du four 10. La sonde 31 est disposée à l'intérieur de cette enceinte.Furthermore, the microprocessor has an input 17₇ to which is applied, via an
Une autre entrée 17₈ du microprocesseur 17 reçoit, par l'intermédiaire d'un circuit interface 32₁, un signal fourni par une résistance variable 32, ou roue codeuse, qui représente la température désirée par l'utilisateur. L'affichage de cette température de consigne est effectuée grâce à un organe d'actionnement se trouvant sur le tableau de commande de l'appareil de cuisson.Another
Une sortie 17₉ du microprocesseur commande, par l'intermédiaire d'un circuit interface 33₁, un verrou 34 pour verrouiller ou déverrouiller automatiquement la porte (non représentée) d'accès au four. Les circonstances dans lesquelles un tel verrouillage intervient seront décrites plus loin.An output 17₉ of the microprocessor controls, via an interface circuit 33₁, a
Le microprocesseur présente encore deux autres entrées 17₁₀ et 17₁₁. L'entrée 17₁₀ est reliée à une résistance variable 25, ou une roue codeuse, par l'intermédiaire d'un circuit interface 25₁. Le microprocesseur convertit la valeur de la résistance ajustable 25 en une durée de conduction du triac 15 à chaque alternance du secteur. La valeur de la résistance 25 est déterminée par l'utilisateur, par exemple à l'aide d'un bouton rotatif ou d'un curseur à déplacement linéaire, en fonction de la puissance d'alimentation qu'il désire pour la résistance 11.The microprocessor has two
De même, l'entrée 17₁₁ du microprocesseur 17 est connectée à une résistance variable 26 (ou roue codeuse) par l'intermédiaire d'un autre circuit interface 26₁. La résistance 26 joue, à l'égard du triac 16, le même rôle que celui joué par la résistance 25 à l'égard du triac 15.Similarly, the
Dans un exemple, les commandes sur les entrées 17₃, 17₄ et 17₅, qui représentent des commandes préprogrammées, sont prioritaires par rapport aux commandes sur les entrées 17₁₀ et 17₁₁.In one example, the commands on the inputs 17₃, 17₄ and 17₅, which represent preprogrammed commands, have priority over the commands on the
On a représenté sur la figure 3 un diagramme correspondant au programme associé à l'entrée 17₃ qui est destiné à commander le nettoyage par pyrolyse. Le temps t est porté en abscisses et la température T en ordonnées.FIG. 3 shows a diagram corresponding to the program associated with the input 17₃ which is intended to control cleaning by pyrolysis. The time t is plotted on the abscissa and the temperature T is plotted on the ordinate.
Le diagramme 50 représente donc la variation de la température T en degrés C en fonction du temps t.Diagram 50 therefore represents the variation of temperature T in degrees C as a function of time t.
Tant que la température à l'intérieur de l'enceinte, détectée par la sonde 31, est inférieure à 180°C, la puissance fournie aux résistances 11 et 12 est maximum, c'est-à-dire que les triacs 15 et 16 sont, au cours de chaque alternance du secteur, conducteurs en permanence. A partir de cette température de 180°C des fumées et de l'oxyde de carbone CO risquent de se dégager en raison d'une combustion incomplète, et ceci d'autant plus qu'à cette température le catalyseur (non montré) généralement prévu dans le plafond de l'enceinte de cuisson, n'est pas encore actif. Dans ces conditions, une fois que la température dans l'enceinte a dépassé 180°C (au temps t₁), le microprocesseur commande une diminution de la puissance fournie aux résistances, notamment à la résistance de sole 12, comme décrit dans le brevet français N°2 588 641 au nom de la Demanderessse. De cette manière, tant que le catalyseur n'est pas amorcé, les déchets organiques qui se trouvent habituellement en partie inférieure du four, ne sont pas brûlés.As long as the temperature inside the enclosure, detected by the
Ensuite (au temps t₂) quand est atteinte la température de 250°C, détectée par la sonde 31, le programme commande de nouveau l'alimentation à pleine puissance des résistances 11 et 12 afin d'atteindre rapidement la température de 500°C. A partir de cette température de 250°C, le catalyseur est actif et il n'y a donc pratiquement plus d'émissions de CO et de fumée.Then (at time t₂) when the temperature of 250 ° C, detected by the
Cependant, avant que soit atteinte la température de 500°C, le microprocesseur délivre quand a été atteinte la température de 350°C (au temps t₃), un signal sur sa sortie 17₉ qui actionne le verrou 34 pour empêcher l'ouverture de la porte d'accès au four. Ce verrou 34 reste fermé tant que la température est supérieure à 350°C.However, before the temperature of 500 ° C is reached, the microprocessor delivers when the temperature of 350 ° C has been reached (at time t₃), a signal on its output 17₉ which actuates the
Lorsqu'est atteinte (au temps t₄) la température de 500°C ou une température légèrement inférieure, par exemple 480°C, la puissance fournie aux résistances diminue de façon importante afin de limiter les risques de dépassement de cette température de 500°C. Le microprocesseur commande ensuite, pendant un temps déterminé par son programme, le maintien de l'alimentation des résistances 11 et 12 de façon telle que la température reste à la valeur de 500°C. L'arrêt du fonctionnement s'effectue de façon automatique, cet arrêt étant également commandé par le microprocesseur 17.When the temperature of 500 ° C or a slightly lower temperature (for example 480 ° C) is reached (at time t₄), the power supplied to the resistors decreases significantly in order to limit the risk of exceeding this temperature of 500 ° C . The microprocessor then controls, for a time determined by its program, the maintenance of the supply of the
La sonde 31 intervient aussi lors du fonctionnement habituel du four, c'est-à-dire quand on fait appel à des programmes de cuisson spécifiques en mémoire du microprocesseur et qui sont déclenchés par actionnement des touches 21, 22, etc ..., ou quand on commande directement par les potentiomètres 25 et 26, la puissance fournie aux résistances de chauffage 11 et 12.The
Claims (3)
- Method for controlling an oven having pyrolysis cleaning, of the type comprising at least one bottom resistive element (12), a grill resistive element (11), a microprocessor (17) controlling the power supplied to the resistive elements, a probe (31) for measuring the temperature within the oven, which delivers a signal to the input (17₇) of the microprocessor and a catalyst which is active above a defined temperature which is lower than the maximum pyrolysis operation temperature, characterized in that, during the pyrolysis cleaning:- the resistive elements are first supplied to a maximum power until a temperature T1 is obtained within the oven which is less than the defined temperature above which smoke and carbon oxide risk being released;- the supply power of the resistive elements is then decreased until the defined catalyst activation temperature is obtained, and- the resistive elements are again supplied to the maximum power until the pyrolysis temperature is obtained.
- Method according to Claim 1, characterized in that the microprocessor sends to an output (17₉) a control pulse for locking (34) the door for access to the oven when the temperature in the chamber exceeds a defined value.
- Method according to one of the preceding claims, characterized in that the probe is a platinum resistor probe with +3°C precision for temperatures lying between 60 and 500°C.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR9005404A FR2661482A1 (en) | 1990-04-27 | 1990-04-27 | COOKING OVEN. |
| FR9005404 | 1990-04-27 | ||
| EP91401072A EP0454568A1 (en) | 1990-04-27 | 1991-04-23 | Cooking oven |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91401072.3 Division | 1991-04-23 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0537796A2 EP0537796A2 (en) | 1993-04-21 |
| EP0537796A3 EP0537796A3 (en) | 1993-05-12 |
| EP0537796B1 true EP0537796B1 (en) | 1995-08-23 |
Family
ID=9396173
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP92119683A Expired - Lifetime EP0537796B1 (en) | 1990-04-27 | 1991-04-23 | Cooking oven |
| EP91401072A Withdrawn EP0454568A1 (en) | 1990-04-27 | 1991-04-23 | Cooking oven |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP91401072A Withdrawn EP0454568A1 (en) | 1990-04-27 | 1991-04-23 | Cooking oven |
Country Status (4)
| Country | Link |
|---|---|
| EP (2) | EP0537796B1 (en) |
| AT (1) | ATE126875T1 (en) |
| DE (1) | DE69112403T2 (en) |
| FR (1) | FR2661482A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4223656A1 (en) * | 1992-07-17 | 1994-01-20 | Bosch Siemens Hausgeraete | Pyrolytic self-cleaning method for oven - Has sensor in cooking space to ascertain degree of contamination and fuzzy logic to control pyrolytic process |
| ES2064280B1 (en) * | 1993-06-08 | 1998-06-16 | Bosch Siemens Hausgeraete | SELF-CLEANING PROCEDURE FOR KITCHENS |
| DE19758860B4 (en) * | 1997-02-17 | 2007-06-06 | Miele & Cie. Kg | Method for controlling a pyrolysis cleaning process |
| US10865999B2 (en) * | 2019-03-01 | 2020-12-15 | Midea Group Co., Ltd. | Targeted oven self-clean preheat temperature control |
| US11009238B2 (en) * | 2019-03-01 | 2021-05-18 | Midea Group Co., Ltd. | Staged oven self-clean preheat temperature control |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2391425A1 (en) * | 1977-05-16 | 1978-12-15 | Cepem | PYROLYTIC OVEN WITH VARIABLE HEATING RAPIDITY |
| DE2733362A1 (en) * | 1977-07-23 | 1979-02-08 | Weiss Kg Alfons | Roasting time control - with microprocessor converting code number into pre- and post-roasting time settings |
| US4369352A (en) * | 1980-12-29 | 1983-01-18 | General Electric Company | Temperature control system facilitating cooking temperature calibration in self-cleaning oven |
| DE3329300A1 (en) * | 1983-08-12 | 1985-02-28 | Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart | ARRANGEMENT FOR CONTROLLING HEATING PERIODS AND HEATING PERFORMANCE FOR COOKERS |
| DE3528229A1 (en) * | 1985-08-06 | 1987-02-12 | Bosch Siemens Hausgeraete | ARRANGEMENT FOR CONTROLLING ELECTRICAL CONSUMERS IN OVENS |
| US4908760A (en) * | 1987-12-31 | 1990-03-13 | Whirlpool Corporation | Self-cleaning oven temperature control having multiple stored temperature tables |
-
1990
- 1990-04-27 FR FR9005404A patent/FR2661482A1/en active Granted
-
1991
- 1991-04-23 EP EP92119683A patent/EP0537796B1/en not_active Expired - Lifetime
- 1991-04-23 DE DE69112403T patent/DE69112403T2/en not_active Expired - Fee Related
- 1991-04-23 EP EP91401072A patent/EP0454568A1/en not_active Withdrawn
- 1991-04-23 AT AT92119683T patent/ATE126875T1/en active
Also Published As
| Publication number | Publication date |
|---|---|
| FR2661482A1 (en) | 1991-10-31 |
| ATE126875T1 (en) | 1995-09-15 |
| FR2661482B1 (en) | 1995-02-03 |
| DE69112403D1 (en) | 1995-09-28 |
| EP0537796A2 (en) | 1993-04-21 |
| EP0454568A1 (en) | 1991-10-30 |
| EP0537796A3 (en) | 1993-05-12 |
| DE69112403T2 (en) | 1996-02-01 |
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