EP1739360B1 - Method for temperature regulation of a heating program in a domestic gas cooking appliance - Google Patents

Method for temperature regulation of a heating program in a domestic gas cooking appliance Download PDF

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Publication number
EP1739360B1
EP1739360B1 EP06116154.3A EP06116154A EP1739360B1 EP 1739360 B1 EP1739360 B1 EP 1739360B1 EP 06116154 A EP06116154 A EP 06116154A EP 1739360 B1 EP1739360 B1 EP 1739360B1
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EP
European Patent Office
Prior art keywords
gas
gas burner
temperature
seconds
cooking
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EP06116154.3A
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German (de)
French (fr)
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EP1739360A2 (en
EP1739360A3 (en
Inventor
Jean-Pierre Carmes
Frédéric DULUCQ
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Groupe Brandt SAS
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Groupe Brandt SAS
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Publication of EP1739360A3 publication Critical patent/EP1739360A3/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/126—Arrangement or mounting of control or safety devices on ranges
    • F24C3/128—Arrangement or mounting of control or safety devices on ranges in baking ovens
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/20—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays
    • F23N5/203—Systems for controlling combustion with a time programme acting through electrical means, e.g. using time-delay relays using electronic means

Definitions

  • the present invention relates to a gas cooking oven, and preferably a gas domestic cooking oven.
  • the present invention relates to the operation of a domestic gas cooking oven during a heating program.
  • a domestic gas cooking oven comprises a muffle, one or more gas burners being adapted to heat the air contained in the muffle.
  • These burners are generally arranged under the bottom wall or the top wall of the muffle.
  • the temperature of the air contained in the muffle is generally regulated by a thermostat controlling a gas flow control valve supplying the gas burner.
  • This valve makes it possible to increase or decrease the gas flow supplying the gas burner by constantly being lit. This is particularly the case of the patent application FR2308868 which describes such a device.
  • the patent application is also known FR2312750 which describes a method of controlling the temperature of a gas oven operating in all or nothing where the gas burner is fed continuously until the desired temperature and then to apply a predetermined program.
  • the object of the present invention is to propose a method of temperature regulation in a gas domestic cooking oven making it possible to regulate the temperature of the cooking chamber precisely with respect to the set temperature, to eliminate the risks of extinction.
  • Said temperature regulation of the cooking chamber makes it possible to manage the operating and rest times of the at least one gas burner. This method allows the ignition of the at least one gas burner sequentially and without risk of not burning a portion of the feed gas for heating the cooking chamber.
  • the present invention provides a temperature control method in a domestic gas cooking oven comprising a muffle whose front face is closed by a door, and comprising an upper wall, side walls, a bottom wall and a bottom wall, and at least one gas burner disposed under the bottom wall of said muffle fed all or nothing.
  • this temperature control method in a domestic gas cooking furnace comprises phases of a heating program divided into S time unit sequences.
  • the duration of operation of the at least one gas burner during sequences of duration S being at the maximum of the duration of the time unit sequences S and a minimum operating time of at least 10 seconds of the at least one gas burner is the condition necessary to ensure its complete ignition so as not to release unburned gas into the cooking chamber.
  • the heating of the air contained in the muffle is regulated by putting into operation and stopping at least one gas burner and not by a change in gas flow rate supplying said at least one gas burner.
  • This temperature control method allows to cut a heating program in unitary sequences to regulate the temperature over short periods.
  • Said unitary sequences make it possible to manage the operation of the at least one gas burner differently according to each heating phase of a cooking program.
  • the operating and resting times of the at least one gas burner may be different during the rise in temperature or the maintenance of the temperature in the oven cooking chamber, as well as during the different phases of a program cleaning by pyrolysis.
  • Each unitary sequence optimally controls the operating and resting time of the at least one gas burner.
  • This control method has the advantage of eliminating the risk of malfunction of the at least one gas burner related to ignition and extinguishing at close time intervals.
  • Said at least one gas burner operates for at least a definite period of time to guarantee its complete ignition. In this way, any partial combustion of the gas supplying the at least one gas burner is avoided.
  • the at least one gas burner operates continuously for at least one unit time sequence. This continuous operation can be repeated on several successive unitary sequences so as to dissipate a maximum power during a period of the heating program.
  • the rest time of said at least one gas burner during time unit sequences S is at least 8 seconds, and preferably of the order of 20 seconds.
  • the rest period after a period of operation of the at least one gas burner ensures the ignition thereof without risk of not completely burn the gas supplying the cooking appliance.
  • this rest period is not respected, the volatile organic compounds emitted by the combustion of the gas of said at least one gas burner may impair the ignition thereof.
  • This domestic cooking appliance 1 is such that a range comprising a domestic gas cooking oven.
  • the domestic gas cooking oven 1 can also be intended to be integrated in a built-in cabinet.
  • This oven 1 comprises a muffle 2 for receiving the food to be cooked.
  • the front face 3 of the muffle 2 is closed by a door 4, and comprises an upper wall 5, side walls 6, a bottom wall 7 and a bottom wall 8.
  • Said oven 1 also comprises at least one heating means 9 placed under the bottom wall 8 of said muffle 2.
  • the heating means 9 placed under the bottom wall 8 of the muffle 2, as illustrated in FIG. figure 2 is an all-or-nothing gas burner.
  • the muffle 2 could also include several burners 9 below the bottom wall 8 of the muffle 2.
  • the domestic gas cooking oven 1 may also comprise an ignition burner (not shown) adapted to ignite the at least one gas burner 9.
  • the muffle 2 also comprises in this embodiment an electric heating element 10 fed in all or nothing disposed under the top wall 5 of the muffle 2.
  • This heating element 10 makes it possible to raise the temperature of the muffle more quickly in cooking mode and to activate at least one catalytic cell 16 as quickly as possible to remove the volatile organic compounds.
  • the upper wall 5 of the muffle 2 comprises an opening 15 adapted to receive In this way, the combustion gases called volatile organic compounds are not discharged directly outside the domestic gas cooking oven 1. But said volatile organic compounds pass through said catalytic cell 16 coated with palladium or carbon dioxide. platinum. Such a catalytic cell 16 functions by cracking the hydrocarbons.
  • a catalytic cell 16 may be of cylindrical or parallelepipedal shape. In the embodiment described, the catalytic cell 16 has a diameter of the order of 30 mm.
  • the treatment of the volatile organic compounds requires a heating means to raise the temperature of the catalytic cell 16 to eliminate said volatile organic compounds emitted in the muffle 2 of the domestic gas cooking oven 1.
  • This heating means is the element electric heater 10 located below the upper wall 5 of the muffle 2.
  • the domestic gas cooking oven 1 comprises control means adapted to turn on and off the gas burner 9 and the electric heating element 10 so as to regulate the temperature of the air contained in the muffle 2 as a function of a set temperature T.
  • phases of a heating program are divided into S time unit sequences.
  • the heating program is divided into unitary time sequences S making it possible to regulate the temperature of the cavity with great precision since the unitary sequences are of short duration.
  • the unit time sequences S are in a range extending between 10 seconds and 1 minute, and preferably of the order of 30 seconds.
  • the unitary time sequences S of said at least one gas burner 9 can take any value between 10 seconds and 1 minute.
  • Said time unit sequences S make it possible to decompose the steps of the cooking program so as to perform an evolutionary regulation.
  • the operation of said at least one gas burner may be different.
  • Each temporal unit sequence S may take a different value from the preceding and following sequence so as to regulate as closely as possible the temperature of the cooking chamber relative to the set temperature.
  • the durations of the time unit sequences S are variable and adjustable according to the data collected by the control means of the domestic gas cooking oven 1.
  • the variation of the duration of the time unit sequences S can be managed by a microprocessor.
  • This microprocessor can make it possible to vary the duration of the time unit sequences S according to preprogrammed recorded data
  • said at least one gas burner 9 can be used to regulate the temperature of the cooking chamber according to three temperature thresholds.
  • the temperature of the cooking chamber is 20 ° C lower than the set temperature T.
  • said at least one gas burner 9 operates in continuous mode, that is to say that the operating time of said at least one gas burner is 30 seconds during one or more unit time sequences S, each duration of 30 seconds.
  • the temperature of the cooking chamber is between 5 ° C and 20 ° C below the set temperature T.
  • said at least one gas burner 9 operates in sequential mode, c ' that is to say that the operating time of said at least one gas burner is 10 seconds during one or more unit time sequences S each duration of 30 seconds.
  • the at least one gas burner is first in operation for 10 seconds and then is stopped for 20 seconds.
  • the temperature of the cooking chamber is 5 ° C lower than the set temperature T. Then, said at least one gas burner 9 is not lit.
  • said microprocessor can also make it possible to vary the duration of the time unit sequences S according to data collected by servocontrol means of the domestic gas cooking furnace by using, for example, servocontrols well known to those skilled in the art such as those denoted by proportional, integral proportional or proportional integral derivative.
  • the operating time of the at least one gas burner 9 during time unit sequences S is at least 10 seconds.
  • the minimum operating time of the at least one gas burner 9 can not be reduced once the unitary time sequence S is started. In the case where this condition is not respected, malfunctions occur during the ignition and / or extinguishing of the at least one gas burner 9.
  • the duration of operation of the at least one gas burner 9 during sequences of duration S is at the maximum of the duration of the time unit sequences S.
  • said at least one gas burner 9 may not operate, be lit for 10 seconds or be turned on for 30 seconds.
  • This operating principle of said at least one gas burner 9 makes it possible to temperature regulation of the cooking chamber of the domestic gas cooking oven.
  • the electric heating element 10 is not necessary for carrying out this method of controlling the temperature of a heating program in a domestic gas cooking oven 1.
  • the regulation of the at least one gas burner 9 can make it possible to carry out all the programs provided in a domestic cooking oven.
  • the electric heating element 10 may be replaced by a gas burner.
  • Said at least one gas burner 9 can be extinguished since the electric heating element 10 is sufficient for the heating program or in the case of a cooking commonly called grill.
  • the ignition of the at least one gas burner 9 depends on the temperature of the cooking chamber and the cycle phase of the heating program.
  • control means detect a temperature too high in the cooking chamber, said at least one gas burner is cut.
  • the minimum operating time of the at least one gas burner 9 is the necessary condition to ensure its complete ignition so as not to release unburned gas into the cooking chamber. This stage of the process allows the treatment of unburned gases and ensures the user a safe operation of the domestic gas cooking oven.
  • the operating times of the at least one gas burner 9 take the values of 10 or 30 seconds for reasons of simplicity in managing the control of the domestic gas cooking oven 1.
  • the time unit sequences S are executed consecutively and without interruption.
  • the unitary time sequences S follow each other without any time period not being managed by the control means.
  • the heating means of the domestic gas cooking furnace operate continuously for at least two time unit sequences without there being a stopping period of at least one heating means during the sequence of said at least two time unitary sequences.
  • the unitary time sequences S make it possible to control the heating means of the domestic gas cooking oven 1 throughout a program so as to be able to give different instructions for each of these sequences.
  • the stopping of the time unit sequences S is at least 8 seconds for a sequential mode operation of the at least one gas burner 9, and preferably of the order of 20 seconds.
  • the stopping time of the at least one gas burner can take any value between 8 and 20 seconds when the duration of a unitary time sequence S is 30 seconds.
  • Said at least one gas burner 9 must be left at rest for a minimum time between two ignitions so as not to generate a quantity of volatile organic compounds that is too great in the cooking chamber. If this amount of volatile organic compounds is too great, said at least one gas burner 9 may encounter ignition difficulties.
  • Said rest time of the at least one gas burner 9 is a safety means to ensure the proper operation of said at least one gas burner 9 so that unburned gas is released in the cooking chamber.
  • said at least one gas burner may be extinguished to operate in sequential mode. This method of operation makes it possible to regulate the temperature of the cooking chamber of the domestic gas cooking oven 1.
  • Said at least one gas burner 9 is cut for at least a period of 8s during a unitary time sequence S, it is the time necessary to ensure the correct ignition of said at least one gas burner 9 during the sequential unitary sequence S next. If this rest period is not respected, volatile organic compounds are present in an environment close to the at least one gas burner 9 and cause adverse reactions to the combustion of the gas released by the control means.
  • the process starts with a first phase triggering the start of a phase of a heating cycle in the muffle 2 of the baking oven.
  • domestic gas 1. This departure can be the start of a departure from a program selected by the user or the delayed start.
  • the electric heating element 10 operates for at least a duration D1 at a maximum power.
  • the electric heating element 10 is operated sequentially during sequences of duration S1 during the first step of the process corresponding to a cooking cycle.
  • Said first step of operation of the at least one gas burner 9 and the electric heating element 10 corresponds to the preheating phase of the muffle 2.
  • Operation at maximum power of the electric heating element 10 activates the catalytic cell 16 as soon as possible.
  • the rise in temperature of the catalytic cell is rapid because the electric heating element 10 is close to said catalytic cell 16.
  • the distance between the catalytic cell 16 and the electric heating element 10 is between 30 mm and 15 mm, and preferably of the order of 20 mm.
  • the catalytic cell 16 is located between two branches of the electric heating element 10.
  • the two branches of the electric heating element 10 are preferably spaced apart by a distance of the order of 55 mm.
  • the catalytic cell 16 can begin to process the volatile organic compounds before the domestic gas cooking oven 1 is at the set temperature T.
  • this temperature control method makes it possible to use a gas burner 9 from the beginning of the firing cycle while having very satisfactory results for the treatment of volatile organic compounds.
  • the operating sequences S1 during the operating time D1 of the electric heating element 10 are in a range extending from 5 seconds to 1 minute, and preferably of the order of 25 seconds.
  • the regulation of the temperature of the air contained in the muffle 2 during the first step of the heating cycle is achieved by the operating time of the gas burner 9.
  • the electric heating element 10 is operated with an offset of a duration D4 with respect to the operation of the gas burner 9 during the first step of the process of a cooking cycle.
  • the heating element 10 is operated with a delay of a duration D4 extending in a range between 1 and 30 seconds, preferably of the order of 2 seconds.
  • the set temperature T is between 35 and 300 ° C during a cooking program in said domestic gas cooking oven 1.
  • a second step of stopping the operation of the at least one gas burner 9 is performed for a duration D2.
  • the shutdown time D2 of the at least one gas burner 9 is in a range of 1 to 8 minutes.
  • the electric heating element 10 is stopped for a duration identical to the shutdown duration D2 of the at least one gas burner 9 during the second step.
  • a third stage of continuous operation of the at least one gas burner 9 is launched for a duration D3.
  • the operating time D3 of the at least one gas burner 9 is in a range from 30 seconds to 8 minutes.
  • the electric heating element 10 is operated simultaneously with said at least one gas burner 9. These two heating means 9 and 10 are preferably operated simultaneously for the third stage of the process.
  • the next step of the program is the repetition of the second and third steps performed consecutively during a complete cycle of a cooking program.
  • the operating time D3 of the at least one gas burner 9 is divided into sequences of duration S2.
  • the duration of the sequence S2 extends in a range of between 20 seconds and 2 minutes, and preferably of the order of 30 seconds.
  • At least two sequences of duration S2 can be produced without interruption of the at least one gas burner 9, and preferably eight S2 sequences.
  • the electric heating element 10 operates proportionally with respect to the at least one gas burner 9 so as to respect the set temperature T.
  • the proportional operating time of the heating element 10 with respect to the operating time D1 or D3 of the at least one gas burner 9 is managed by the control means of the domestic cooking oven 1.
  • the control means evaluate the temperature difference between the set temperature T and the value measured by means of a temperature probe. This measured temperature difference allows the control means to supply the electric heating element 10 for the time necessary to maintain the cooking oven 1 at the set temperature T and to avoid large fluctuations around said set temperature T.
  • This principle is also used during the temperature rise phase of the cooking oven 1 during the first step.
  • a theoretical temperature rise curve of the cooking chamber is stored by the control means.
  • This temperature rise curve is a ramp. It has the particularity to end with an asymptote to eliminate any risk of excessive temperature rise during a malfunction of the device.
  • This learning mode of the baking oven 1 is performed in the laboratory by the Applicant.
  • a maximum operating time threshold of the electric heating element 10 is determined in the operating parameters of the control means. This operating time is between 15 seconds and 2 minutes and preferably of the order of 25 seconds.
  • control means evaluate the temperature difference between the setpoint and the measured value and adapt this operating time accordingly.
  • the management of said operating periods can be performed by a microprocessor having fixed durations for each cooking program or by automatic cooking means.
  • the electric heating element 10 operates sequentially during sequences of duration S3 during the third step of the method.
  • the operating sequences S3 during the operating time D3 of the electric heating element 10 are in a range extending from 10 seconds to 1 minute, and preferably of the order of 25 seconds.
  • the muffle 2 comprises a temperature probe (not shown) adapted to measure the furnace center temperature.
  • This temperature probe is connected to control means adapted to switch on and off the gas burner 9 and the electric heating element 10 so as to regulate the temperature of the air contained in the muffle 2 as a function of a heating temperature. setpoint T.
  • the catalytic cell 16 makes it possible to eliminate almost all the emissions of toxic volatile organic compounds from a rise in temperature of the catalytic cell of the order of 200 ° C.
  • This temperature control process makes it possible to respond very favorably to the normative requirements concerning emissions of carbon monoxide and carbon dioxide. This process makes it possible to treat almost all the volatile organic compounds emitted during a cooking cycle.
  • the temperature control method provides a product that performs well in terms of safety vis-à-vis the user since the air released into the kitchen is devoid of toxic gases.
  • the state of the art gas cooking apparatus did not make it possible to obtain such good volatile organic compound treatment performances and to guarantee the safety of the users since said apparatus did not have a catalytic cell 16 and a temperature control method as described above.
  • the catalytic cell 16 is partially activated since the total activation temperature of the catalytic cell has not yet been reached.
  • the domestic gas cooking oven 1 as described above thus allows a treatment of volatile organic compounds emitted in the muffle during a cooking program.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Regulation And Control Of Combustion (AREA)
  • Baking, Grill, Roasting (AREA)

Description

La présente invention concerne un four de cuisson à gaz, et de préférence un four de cuisson domestique à gaz.The present invention relates to a gas cooking oven, and preferably a gas domestic cooking oven.

De manière générale, la présente invention concerne le fonctionnement d'un four de cuisson domestique à gaz pendant un programme de chauffage.In general, the present invention relates to the operation of a domestic gas cooking oven during a heating program.

Traditionnellement, un four de cuisson domestique à gaz comprend un moufle, un ou plusieurs brûleurs à gaz étant adaptés à chauffer l'air contenu dans le moufle.Traditionally, a domestic gas cooking oven comprises a muffle, one or more gas burners being adapted to heat the air contained in the muffle.

Ces brûleurs sont généralement disposés sous la paroi inférieure ou la paroi supérieure du moufle.These burners are generally arranged under the bottom wall or the top wall of the muffle.

La température de l'air contenu dans le moufle est généralement régulée par un thermostat commandant une vanne de régulation du débit de gaz alimentant le brûleur à gaz. Cette vanne permet d'augmenter ou de diminuer le débit de gaz alimentant le brûleur à gaz en restant constamment allumé. C'est en particulier le cas de la demande de brevet FR2308868 qui décrit un tel dispositif.The temperature of the air contained in the muffle is generally regulated by a thermostat controlling a gas flow control valve supplying the gas burner. This valve makes it possible to increase or decrease the gas flow supplying the gas burner by constantly being lit. This is particularly the case of the patent application FR2308868 which describes such a device.

Ces fours de cuisson domestiques à gaz permettent de réguler la température de l'air contenu dans le four à une température de consigne comprise entre 150 et 285°C.These domestic gas cooking ovens make it possible to regulate the temperature of the air contained in the oven at a set temperature of between 150 and 285 ° C.

On connaît également la demande de brevet FR2312750 qui décrit un procédé de régulation de la température d'un four à gaz fonctionnant en tout ou rien où le brûleur à gaz est alimenté en continu jusqu'à obtention de la température désirée puis à appliquer un programme prédéterminé.The patent application is also known FR2312750 which describes a method of controlling the temperature of a gas oven operating in all or nothing where the gas burner is fed continuously until the desired temperature and then to apply a predetermined program.

La présente invention a pour but de proposer un procédé de régulation de température dans un four de cuisson domestique à gaz permettant de réguler la température de l'enceinte de cuisson avec précision par rapport à la température de consigne, de supprimer les risques d'extinction du au moins un brûleur à gaz lié à l'accumulation de gaz dans l'enceinte de cuisson.The object of the present invention is to propose a method of temperature regulation in a gas domestic cooking oven making it possible to regulate the temperature of the cooking chamber precisely with respect to the set temperature, to eliminate the risks of extinction. at least one gas burner related to the accumulation of gas in the cooking chamber.

Ladite régulation de température de l'enceinte de cuisson permet de gérer les temps de fonctionnement et de repos du au moins un brûleur à gaz. Ce procédé permet l'allumage du au moins un brûleur à gaz de manière séquentielle et sans risque de ne pas brûler une partie du gaz d'alimentation pour le chauffage de l'enceinte de cuisson.Said temperature regulation of the cooking chamber makes it possible to manage the operating and rest times of the at least one gas burner. This method allows the ignition of the at least one gas burner sequentially and without risk of not burning a portion of the feed gas for heating the cooking chamber.

A cet effet, la présente invention vise un procédé de régulation de température dans un four de cuisson domestique à gaz comprenant un moufle dont la face frontale est fermée par une porte, et comprenant une paroi supérieure, des parois latérales, une paroi de fond et une paroi inférieure, ainsi qu'au moins un brûleur à gaz disposé sous la paroi inférieure dudit moufle alimenté en tout ou rien.For this purpose, the present invention provides a temperature control method in a domestic gas cooking oven comprising a muffle whose front face is closed by a door, and comprising an upper wall, side walls, a bottom wall and a bottom wall, and at least one gas burner disposed under the bottom wall of said muffle fed all or nothing.

Selon l'invention, ce procédé de régulation de température dans un four de cuisson domestique à gaz comprend des phases d'un programme de chauffage divisées en séquences unitaires temporelles S.According to the invention, this temperature control method in a domestic gas cooking furnace comprises phases of a heating program divided into S time unit sequences.

La durée de fonctionnement dudit au moins un brûleur à gaz lors des séquences de durée S étant au maximum de la durée des séquences unitaires temporelles S et un temps de fonctionnement minimum au moins égal à 10 secondes du au moins un brûleur à gaz est la condition nécessaire pour s'assurer de son allumage complet afin de ne pas libérer du gaz non brûlé dans l'enceinte de cuisson.The duration of operation of the at least one gas burner during sequences of duration S being at the maximum of the duration of the time unit sequences S and a minimum operating time of at least 10 seconds of the at least one gas burner is the condition necessary to ensure its complete ignition so as not to release unburned gas into the cooking chamber.

Ainsi, le chauffage de l'air contenu dans le moufle est régulé par la mise en fonctionnement et l'arrêt d'au moins un brûleur à gaz et non pas par une variation de débit du gaz alimentant ledit au moins un brûleur à gaz.Thus, the heating of the air contained in the muffle is regulated by putting into operation and stopping at least one gas burner and not by a change in gas flow rate supplying said at least one gas burner.

Ce procédé de régulation de température permet de découper un programme de chauffage en séquences unitaires pour réguler la température sur de courtes périodes.This temperature control method allows to cut a heating program in unitary sequences to regulate the temperature over short periods.

Lesdites séquences unitaires permettent de gérer le fonctionnement du au moins un brûleur à gaz de manière différente suivant chaque phase de chauffage d'un programme de cuisson.Said unitary sequences make it possible to manage the operation of the at least one gas burner differently according to each heating phase of a cooking program.

Les temps de fonctionnement et de repos du au moins un brûleur à gaz peuvent être différents au cours de la montée en température ou le maintien de la température dans l'enceinte de cuisson du four, de même que lors des différentes phases d'un programme de nettoyage par pyrolyse.The operating and resting times of the at least one gas burner may be different during the rise in temperature or the maintenance of the temperature in the oven cooking chamber, as well as during the different phases of a program cleaning by pyrolysis.

Chaque séquence unitaire permet de commander de manière optimum le temps de fonctionnement et de repos du au moins un brûleur à gaz.Each unitary sequence optimally controls the operating and resting time of the at least one gas burner.

Ce procédé de régulation a l'avantage de supprimer le risque de mauvais fonctionnement du au moins un brûleur à gaz lié à l'allumage et l'extinction à des intervalles de temps rapprochés.This control method has the advantage of eliminating the risk of malfunction of the at least one gas burner related to ignition and extinguishing at close time intervals.

Ledit au moins un brûleur à gaz fonctionne pendant au moins une durée définie pour garantir son allumage complet. De cette manière, toute combustion partielle du gaz alimentant ledit au moins un brûleur à gaz est évitée.Said at least one gas burner operates for at least a definite period of time to guarantee its complete ignition. In this way, any partial combustion of the gas supplying the at least one gas burner is avoided.

Ledit au moins un brûleur à gaz fonctionne de manière continue pendant au moins une séquence unitaire temporelle. Ce fonctionnement en continu peut être répété sur plusieurs séquences unitaires se succédant de manière à dissiper une puissance maximum pendant une période du programme de chauffage.The at least one gas burner operates continuously for at least one unit time sequence. This continuous operation can be repeated on several successive unitary sequences so as to dissipate a maximum power during a period of the heating program.

Selon une autre caractéristique préférée de l'invention, la durée de repos dudit au moins un brûleur à gaz lors les séquences unitaires temporelles S est d'au moins 8 secondes, et de préférence de l'ordre de 20 secondes.According to another preferred feature of the invention, the rest time of said at least one gas burner during time unit sequences S is at least 8 seconds, and preferably of the order of 20 seconds.

La durée de repos après une durée de fonctionnement dudit au moins un brûleur à gaz permet de garantir l'allumage de celui-ci sans risques de ne pas brûler complètement le gaz alimentant l'appareil de cuisson. Dans le cas où cette durée de repos n'est pas respectée, les composés organiques volatils émis par la combustion du gaz dudit au moins un brûleur à gaz peuvent nuire à l'allumage de celui-ci.The rest period after a period of operation of the at least one gas burner ensures the ignition thereof without risk of not completely burn the gas supplying the cooking appliance. In the case where this rest period is not respected, the volatile organic compounds emitted by the combustion of the gas of said at least one gas burner may impair the ignition thereof.

D'autres particularités et avantages de l'invention apparaîtront encore dans la description ci-après.Other features and advantages of the invention will become apparent in the description below.

Aux dessins annexés, donnés à titre d'exemples non limitatifs :

  • la figure 1 est une vue en perspective d'un appareil de cuisson domestique avec la porte dans une position ouverte conforme à l'invention ;
  • la figure 2 est une vue en coupe et en élévation d'un appareil de cuisson domestique conforme à l'invention ;
  • la figure 3 est un graphique illustrant l'émission de monoxyde de carbone au cours d'un programme de cuisson ; et
  • la figure 4 est un graphique illustrant la montée en température du moufle et de la cellule catalytique, et les durées de fonctionnement des moyens de chauffage au cours d'un programme de cuisson.
In the accompanying drawings, given as non-limiting examples:
  • the figure 1 is a perspective view of a domestic cooking appliance with the door in an open position according to the invention;
  • the figure 2 is a sectional and elevational view of a domestic cooking appliance according to the invention;
  • the figure 3 is a graph illustrating the emission of carbon monoxide during a cooking program; and
  • the figure 4 is a graph illustrating the temperature rise of the muffle and the catalytic cell, and the operating times of the heating means during a cooking program.

On va décrire tout d'abord, en référence aux figures 1 et 2, un appareil de cuisson domestique 1 conforme à l'invention. Cet appareil de cuisson domestique 1 est tel qu'une cuisinière comprenant un four de cuisson domestique à gaz.We will first describe, with reference to figures 1 and 2 , a domestic cooking appliance 1 according to the invention. This domestic cooking appliance 1 is such that a range comprising a domestic gas cooking oven.

Le four de cuisson domestique à gaz 1 peut aussi être destiné à être intégré dans un meuble d'encastrement.The domestic gas cooking oven 1 can also be intended to be integrated in a built-in cabinet.

Ce four 1 comprend un moufle 2 destiné à recevoir les aliments à cuire. La face frontale 3 du moufle 2 est fermée par une porte 4, et comprend une paroi supérieure 5, des parois latérales 6, une paroi de fond 7 et une paroi inférieure 8.This oven 1 comprises a muffle 2 for receiving the food to be cooked. The front face 3 of the muffle 2 is closed by a door 4, and comprises an upper wall 5, side walls 6, a bottom wall 7 and a bottom wall 8.

Ledit four 1 comprend aussi au moins un moyen de chauffage 9 disposé sous la paroi inférieure 8 dudit moufle 2. Le moyen de chauffage 9 disposé sous la paroi inférieure 8 du moufle 2, tel qu'illustré sur la figure 2, est un brûleur à gaz alimenté en tout ou rien.Said oven 1 also comprises at least one heating means 9 placed under the bottom wall 8 of said muffle 2. The heating means 9 placed under the bottom wall 8 of the muffle 2, as illustrated in FIG. figure 2 , is an all-or-nothing gas burner.

Dans ce mode de réalisation, un seul brûleur à gaz 9 a été illustré. Bien entendu, le moufle 2 pourrait également comporter plusieurs brûleurs 9 en dessous de la paroi inférieure 8 du moufle 2.In this embodiment, a single gas burner 9 has been illustrated. Of course, the muffle 2 could also include several burners 9 below the bottom wall 8 of the muffle 2.

Le four de cuisson domestique à gaz 1 peut comprendre également un brûleur d'allumage (non représenté) adapté à allumer ledit au moins un brûleur à gaz 9.The domestic gas cooking oven 1 may also comprise an ignition burner (not shown) adapted to ignite the at least one gas burner 9.

Le moufle 2 comporte également dans ce mode de réalisation un élément chauffant électrique 10 alimenté en tout ou rien disposé sous la paroi supérieure 5 du moufle 2. Cet élément chauffant 10 permet d'élever la température du moufle plus rapidement en mode cuisson et d'activer au moins une cellule catalytique 16 le plus rapidement possible pour supprimer les composés organiques volatils.The muffle 2 also comprises in this embodiment an electric heating element 10 fed in all or nothing disposed under the top wall 5 of the muffle 2. This heating element 10 makes it possible to raise the temperature of the muffle more quickly in cooking mode and to activate at least one catalytic cell 16 as quickly as possible to remove the volatile organic compounds.

Bien entendu, l'ensemble est décrit dans un boîtier d'appareil qui n'a pas besoin d'être décrit ici.Of course, the assembly is described in a device housing that does not need to be described here.

En outre, l'ensemble des autres composants nécessaires au fonctionnement d'un appareil de cuisson domestique alimenté en gaz, tels que, par exemple, les moyens de commande et de régulation de la température, d'alimentation en gaz, et de sécurité ne sont pas représentés ou décrits dès lors qu'ils peuvent être identiques à ceux bien connu de l'homme du métier dans ce domaine.In addition, all the other components necessary for the operation of a gas-fired domestic cooking appliance, such as, for example, the means for controlling and regulating the temperature, the gas supply, and the safety device are not shown or described as they may be identical to those well known to those skilled in the art.

La paroi supérieure 5 du moufle 2 comprend une ouverture 15 adaptée à recevoir une cellule catalytique 16. De cette manière, les gaz de combustion appelés composés organiques volatils ne sont pas rejetés directement à l'extérieur du four de cuisson domestique à gaz 1. Mais lesdits composés organiques volatils traversent ladite cellule catalytique 16 recouverte de palladium ou de platine. Une telle cellule catalytique 16 fonctionne par craquage des hydrocarbures. Une cellule catalytique 16 peut être de forme cylindrique ou parallélépipédique. Dans le mode de réalisation décrit, la cellule catalytique 16 a un diamètre de l'ordre de 30mm.The upper wall 5 of the muffle 2 comprises an opening 15 adapted to receive In this way, the combustion gases called volatile organic compounds are not discharged directly outside the domestic gas cooking oven 1. But said volatile organic compounds pass through said catalytic cell 16 coated with palladium or carbon dioxide. platinum. Such a catalytic cell 16 functions by cracking the hydrocarbons. A catalytic cell 16 may be of cylindrical or parallelepipedal shape. In the embodiment described, the catalytic cell 16 has a diameter of the order of 30 mm.

Le traitement des composés organiques volatils nécessite qu'un moyen de chauffage permette de monter en température la cellule catalytique 16 pour supprimer lesdits composés organiques volatils émis dans le moufle 2 du four de cuisson domestique à gaz 1. Ce moyen de chauffage est l'élément chauffant électrique 10 située en dessous de la paroi supérieure 5 du moufle 2.The treatment of the volatile organic compounds requires a heating means to raise the temperature of the catalytic cell 16 to eliminate said volatile organic compounds emitted in the muffle 2 of the domestic gas cooking oven 1. This heating means is the element electric heater 10 located below the upper wall 5 of the muffle 2.

Le four de cuisson domestique à gaz 1 comprend des moyens de commande adaptés à allumer et éteindre le brûleur à gaz 9 et l'élément chauffant électrique 10 de manière à réguler la température de l'air contenu dans le moufle 2 en fonction d'une température de consigne T.The domestic gas cooking oven 1 comprises control means adapted to turn on and off the gas burner 9 and the electric heating element 10 so as to regulate the temperature of the air contained in the muffle 2 as a function of a set temperature T.

Selon un mode de réalisation préféré de l'invention, des phases d'un programme de chauffage sont divisées en séquences unitaires temporelles S.According to a preferred embodiment of the invention, phases of a heating program are divided into S time unit sequences.

Le programme de chauffage est divisé en séquences unitaires temporelles S permettant d'effectuer la régulation de température de la cavité avec une grande précision étant donné que les séquences unitaires sont de courte durée.The heating program is divided into unitary time sequences S making it possible to regulate the temperature of the cavity with great precision since the unitary sequences are of short duration.

Les séquences unitaires temporelles S sont comprises dans une plage s'étendant entre 10 secondes et 1 minute, et de préférence de l'ordre de 30 secondes.The unit time sequences S are in a range extending between 10 seconds and 1 minute, and preferably of the order of 30 seconds.

Néanmoins, les séquences unitaires temporelles S dudit au moins un brûleur à gaz 9 peuvent prendre une valeur quelconque entre 10 secondes et 1 minute.Nevertheless, the unitary time sequences S of said at least one gas burner 9 can take any value between 10 seconds and 1 minute.

Lesdites séquences unitaires temporelles S permettent de décomposer les étapes du programme de cuisson de manière à effectuer une régulation évolutive. Pour chaque étape du programme de chauffage, le fonctionnement dudit au moins un brûleur à gaz peut être différent.Said time unit sequences S make it possible to decompose the steps of the cooking program so as to perform an evolutionary regulation. For each step of the heating program, the operation of said at least one gas burner may be different.

Chaque séquence unitaire temporelle S peut prendre une valeur différente de la séquence précédente et suivante de manière à réguler au plus près la température de l'enceinte de cuisson par rapport à la température de consigne.Each temporal unit sequence S may take a different value from the preceding and following sequence so as to regulate as closely as possible the temperature of the cooking chamber relative to the set temperature.

Par conséquent, dans une même phase du procédé les durées des séquences unitaires temporelles S sont variables et modulables suivant les données recueillies par les moyens de commande du four de cuisson domestique à gaz 1.Consequently, in one and the same phase of the process, the durations of the time unit sequences S are variable and adjustable according to the data collected by the control means of the domestic gas cooking oven 1.

La variation de la durée des séquences unitaires temporelles S peut être gérée par un microprocesseur. Ce microprocesseur peut permettre de faire varier la durée des séquences unitaires temporelles S suivant des données enregistrées préprogramméesThe variation of the duration of the time unit sequences S can be managed by a microprocessor. This microprocessor can make it possible to vary the duration of the time unit sequences S according to preprogrammed recorded data

Dans un exemple de réalisation, ledit au moins un brûleur à gaz 9 peut permettre de réguler la température de l'enceinte de cuisson suivant trois seuils de températures.In an exemplary embodiment, said at least one gas burner 9 can be used to regulate the temperature of the cooking chamber according to three temperature thresholds.

Tout d'abord, la température de l'enceinte de cuisson est inférieure de 20°C par rapport à la température de consigne T. Alors, ledit au moins un brûleur à gaz 9 fonctionne en mode continu, c'est-à-dire que la durée de fonctionnement dudit au moins un brûleur à gaz est de 30 secondes pendant une ou plusieurs séquences unitaires temporelles S, chacune durée de 30 secondes.First, the temperature of the cooking chamber is 20 ° C lower than the set temperature T. Then, said at least one gas burner 9 operates in continuous mode, that is to say that the operating time of said at least one gas burner is 30 seconds during one or more unit time sequences S, each duration of 30 seconds.

Dans un deuxième cas, la température de l'enceinte de cuisson est comprise entre 5°C et 20°C au-dessous de la température de consigne T. Alors, ledit au moins un brûleur à gaz 9 fonctionne en mode séquentiel, c'est-à-dire que la durée de fonctionnement dudit au moins un brûleur à gaz est de 10 secondes pendant une ou plusieurs séquences unitaires temporelles S chacune durée de 30 secondes. Ledit au moins un brûleur à gaz est tout d'abord en fonctionnement pendant 10 secondes et ensuite est arrêté pendant 20 secondes.In a second case, the temperature of the cooking chamber is between 5 ° C and 20 ° C below the set temperature T. Then, said at least one gas burner 9 operates in sequential mode, c ' that is to say that the operating time of said at least one gas burner is 10 seconds during one or more unit time sequences S each duration of 30 seconds. The at least one gas burner is first in operation for 10 seconds and then is stopped for 20 seconds.

Dans un troisième cas, la température de l'enceinte de cuisson est inférieure de 5°C par rapport à la température de consigne T. Alors, ledit au moins un brûleur à gaz 9 n'est pas allumé.In a third case, the temperature of the cooking chamber is 5 ° C lower than the set temperature T. Then, said at least one gas burner 9 is not lit.

Ce mode de réalisation n'est qu'un exemple et bien d'autres modes de réalisation peuvent être mis au point par l'homme du métier.This embodiment is only an example and many other embodiments can be developed by those skilled in the art.

Notamment, ledit microprocesseur peut aussi permettre de faire varier la durée des séquences unitaires temporelles S suivant des données recueillies par des moyens d'asservissement du four de cuisson domestique à gaz en utilisant par exemple des asservissements bien connus de l'homme du métier tels que ceux dénommés par proportionnel, proportionnel intégral ou encore proportionnel intégral dérivé.In particular, said microprocessor can also make it possible to vary the duration of the time unit sequences S according to data collected by servocontrol means of the domestic gas cooking furnace by using, for example, servocontrols well known to those skilled in the art such as those denoted by proportional, integral proportional or proportional integral derivative.

La durée de fonctionnement dudit au moins un brûleur à gaz 9 lors des séquences unitaires temporelles S est au minimum de 10 secondes.The operating time of the at least one gas burner 9 during time unit sequences S is at least 10 seconds.

La durée de fonctionnement minimale du au moins un brûleur à gaz 9 ne peut être réduite une fois que la séquence unitaire temporelle S est lancée. Dans le cas où cette condition n'est pas respectée, des anomalies de fonctionnement interviennent lors de l'allumage et / ou de l'extinction du au moins un brûleur à gaz 9.The minimum operating time of the at least one gas burner 9 can not be reduced once the unitary time sequence S is started. In the case where this condition is not respected, malfunctions occur during the ignition and / or extinguishing of the at least one gas burner 9.

La durée de fonctionnement dudit au moins un brûleur à gaz 9 lors des séquences de durée S est au maximum de la durée des séquences unitaires temporelles S.The duration of operation of the at least one gas burner 9 during sequences of duration S is at the maximum of the duration of the time unit sequences S.

Par exemple, lors d'une séquence unitaire temporelle S, ledit au moins un brûleur à gaz 9 peut ne pas fonctionner, être allumé 10 secondes ou encore être allumé 30 secondes.For example, during a unitary time sequence S, said at least one gas burner 9 may not operate, be lit for 10 seconds or be turned on for 30 seconds.

Ce principe de fonctionnement dudit au moins un brûleur à gaz 9 permet de faire une régulation en température de l'enceinte de cuisson du four de cuisson domestique à gaz. L'élément chauffant électrique 10 n'est pas nécessaire pour la réalisation de ce procédé de régulation de température d'un programme de chauffage dans un four de cuisson domestique à gaz 1.This operating principle of said at least one gas burner 9 makes it possible to temperature regulation of the cooking chamber of the domestic gas cooking oven. The electric heating element 10 is not necessary for carrying out this method of controlling the temperature of a heating program in a domestic gas cooking oven 1.

La régulation du au moins un brûleur à gaz 9 peut permettre de réaliser l'ensemble des programmes prévus dans un four de cuisson domestique.The regulation of the at least one gas burner 9 can make it possible to carry out all the programs provided in a domestic cooking oven.

En outre, l'élément chauffant électrique 10 peut être remplacé par un brûleur à gaz.In addition, the electric heating element 10 may be replaced by a gas burner.

Ledit au moins un brûleur à gaz 9 peut être éteint étant donné que l'élément chauffant électrique 10 suffit pour le programme de chauffage ou bien dans le cas d'une cuisson communément appelée grill.Said at least one gas burner 9 can be extinguished since the electric heating element 10 is sufficient for the heating program or in the case of a cooking commonly called grill.

L'allumage du au moins un brûleur à gaz 9 dépend de la température de l'enceinte de cuisson et de la phase du cycle du programme de chauffage.The ignition of the at least one gas burner 9 depends on the temperature of the cooking chamber and the cycle phase of the heating program.

Dans le cas où les moyens de commande détectent une température trop élevée dans l'enceinte de cuisson, ledit au moins un brûleur à gaz est coupé.In the case where the control means detect a temperature too high in the cooking chamber, said at least one gas burner is cut.

Le temps de fonctionnement minimum du au moins un brûleur à gaz 9 est la condition nécessaire pour s'assurer de son allumage complet afin de ne pas libérer du gaz non brûlé dans l'enceinte de cuisson. Cette étape du procédé permet le traitement des gaz imbrûlés et d'assurer à l'utilisateur un fonctionnement du four de cuisson domestique à gaz en toute sécurité.The minimum operating time of the at least one gas burner 9 is the necessary condition to ensure its complete ignition so as not to release unburned gas into the cooking chamber. This stage of the process allows the treatment of unburned gases and ensures the user a safe operation of the domestic gas cooking oven.

Dans le mode de réalisation décrit, les durées de fonctionnement du au moins un brûleur à gaz 9 prennent les valeurs de 10 ou 30 secondes pour des raisons de simplicité de gestion de la commande du four de cuisson domestique à gaz 1.In the embodiment described, the operating times of the at least one gas burner 9 take the values of 10 or 30 seconds for reasons of simplicity in managing the control of the domestic gas cooking oven 1.

Les séquences unitaires temporelles S sont exécutées consécutivement et sans interruption.The time unit sequences S are executed consecutively and without interruption.

Les séquences unitaires temporelles S s'enchaînent les une après les autres sans qu'aucune période de temps ne soit pas gérée par les moyens de commande.The unitary time sequences S follow each other without any time period not being managed by the control means.

Les moyens de chauffage du four de cuisson domestique à gaz fonctionnement en continu pendant au moins deux séquences unitaires temporelles sans qu'il n'y ait une période d'arrêt d'au moins un moyen de chauffage pendant l'enchaînement desdites au moins deux séquences unitaires temporelles.The heating means of the domestic gas cooking furnace operate continuously for at least two time unit sequences without there being a stopping period of at least one heating means during the sequence of said at least two time unitary sequences.

Les séquences unitaires temporelles S permettent de commander les moyens de chauffage du four de cuisson domestique à gaz 1 tout au long d'un programme de manière à pouvoir donner des consignes différentes pour chacune de ces séquences.The unitary time sequences S make it possible to control the heating means of the domestic gas cooking oven 1 throughout a program so as to be able to give different instructions for each of these sequences.

L'arrêt des séquences unitaires temporelles S est d'au moins 8 secondes pour un fonctionnement en mode séquentiel du au moins un brûleur à gaz 9, et de préférence de l'ordre de 20 secondes.The stopping of the time unit sequences S is at least 8 seconds for a sequential mode operation of the at least one gas burner 9, and preferably of the order of 20 seconds.

Le temps d'arrêt du au moins un brûleur à gaz peut prendre toutes les valeurs comprises entre 8 et 20 secondes lorsque la durée d'une séquence unitaire temporelle S est de 30 secondes.The stopping time of the at least one gas burner can take any value between 8 and 20 seconds when the duration of a unitary time sequence S is 30 seconds.

Ledit au moins un brûleur à gaz 9 doit être laissé au repos un temps minimum entre deux allumages pour ne pas générer une quantité de composés organiques volatils trop importante dans l'enceinte de cuisson. Si cette quantité de composés organiques volatils est trop importante, ledit au moins un brûleur à gaz 9 peut rencontrer des difficultés d'allumage.Said at least one gas burner 9 must be left at rest for a minimum time between two ignitions so as not to generate a quantity of volatile organic compounds that is too great in the cooking chamber. If this amount of volatile organic compounds is too great, said at least one gas burner 9 may encounter ignition difficulties.

Ledit temps de repos du au moins un brûleur à gaz 9 est un moyen de sécurité pour assurer le bon fonctionnement dudit au moins un brûleur à gaz 9 afin que du gaz non brûlé ne soit dégagé dans l'enceinte de cuisson.Said rest time of the at least one gas burner 9 is a safety means to ensure the proper operation of said at least one gas burner 9 so that unburned gas is released in the cooking chamber.

Pendant une séquence unitaire temporelle S, ledit au moins un brûleur à gaz peut être éteint pour fonctionner en mode séquentiel. Cette méthode de fonctionnement permet de réguler la température de l'enceinte de cuisson du four de cuisson domestique à gaz 1.During a unit time sequence S, said at least one gas burner may be extinguished to operate in sequential mode. This method of operation makes it possible to regulate the temperature of the cooking chamber of the domestic gas cooking oven 1.

Ledit au moins un brûleur à gaz 9 est coupé pendant au moins une durée de 8s au cours d'une séquence unitaire temporelle S, c'est le temps nécessaire pour assurer l'allumage correct dudit au moins un brûleur à gaz 9 lors de la séquence unitaire temporelles S suivante. Si cette durée de repos n'est pas respectée, des composés organiques volatils sont présents dans un environnement proche du au moins un brûleur à gaz 9 et provoquent des réactions nuisibles à la combustion du gaz libéré par les moyens de régulation.Said at least one gas burner 9 is cut for at least a period of 8s during a unitary time sequence S, it is the time necessary to ensure the correct ignition of said at least one gas burner 9 during the sequential unitary sequence S next. If this rest period is not respected, volatile organic compounds are present in an environment close to the at least one gas burner 9 and cause adverse reactions to the combustion of the gas released by the control means.

Dans le cas où ledit au moins un brûleur à gaz 9 dysfonctionne lors du programme de chauffage, une sécurité redondante est réalisée par la cellule catalytique effectuant le traitement des composés organiques volatils émis dans l'enceinte de cuisson.In the case where said at least one gas burner 9 malfunctions during the heating program, redundant safety is achieved by the catalytic cell performing the treatment of volatile organic compounds emitted into the cooking chamber.

Avec ces dispositifs de sécurité, l'utilisateur est protégé de tout dégagement de gaz à l'extérieur de l'appareil de cuisson.With these safety devices, the user is protected from any release of gas outside the cooking appliance.

Selon le procédé de l'invention mis en oeuvre, par exemple, lors de l'étape de cuisson, le procédé débute par une première phase déclenchant le départ d'une phase d'un cycle de chauffage dans le moufle 2 du four de cuisson domestique à gaz 1. Ce départ peut être le lancement d'un départ d'un programme sélectionné par l'utilisateur ou le départ différé.According to the method of the invention implemented, for example, during the firing step, the process starts with a first phase triggering the start of a phase of a heating cycle in the muffle 2 of the baking oven. domestic gas 1. This departure can be the start of a departure from a program selected by the user or the delayed start.

Ensuite, une première étape de montée en température de l'air contenu dans le moufle 2 par le fonctionnement en continu du au moins un brûleur à gaz 9 jusqu'à une température de consigne T.Then, a first step of raising the temperature of the air contained in the muffle 2 by the continuous operation of the at least one gas burner 9 to a set temperature T.

Au cours de ladite première étape, l'élément chauffant électrique 10 fonctionne pendant au moins une durée D1 à une puissance maximum.During said first step, the electric heating element 10 operates for at least a duration D1 at a maximum power.

L'élément chauffant électrique 10 est mis en fonctionnement de manière séquentielle pendant des séquences de durée S1 lors de la première étape du procédé correspondant à un cycle de cuisson.The electric heating element 10 is operated sequentially during sequences of duration S1 during the first step of the process corresponding to a cooking cycle.

Ladite première étape de fonctionnement du au moins un brûleur à gaz 9 et de l'élément chauffant électrique 10 correspond à la phase de préchauffage du moufle 2.Said first step of operation of the at least one gas burner 9 and the electric heating element 10 corresponds to the preheating phase of the muffle 2.

La mise en fonctionnement à la puissance maximum de l'élément chauffant électrique 10 permet d'activer le plus tôt possible la cellule catalytique 16.Operation at maximum power of the electric heating element 10 activates the catalytic cell 16 as soon as possible.

La montée en température de la cellule catalytique est rapide du fait que l'élément chauffant électrique 10 est à proximité de ladite cellule catalytique 16.The rise in temperature of the catalytic cell is rapid because the electric heating element 10 is close to said catalytic cell 16.

La distance entre la cellule catalytique 16 et l'élément chauffant électrique 10 est comprise entre 30mm et 15mm, et de préférence de l'ordre de 20mm.The distance between the catalytic cell 16 and the electric heating element 10 is between 30 mm and 15 mm, and preferably of the order of 20 mm.

La cellule catalytique 16 se situe entre deux branches de l'élément chauffant électrique 10. Les deux branches de l'élément chauffant électrique 10 sont de préférence écartées d'une distance de l'ordre de 55mm.The catalytic cell 16 is located between two branches of the electric heating element 10. The two branches of the electric heating element 10 are preferably spaced apart by a distance of the order of 55 mm.

De cette manière, la cellule catalytique 16 peut commencer à traiter les composés organiques volatils avant que le four de cuisson domestique à gaz 1 soit à la température de consigne T.In this way, the catalytic cell 16 can begin to process the volatile organic compounds before the domestic gas cooking oven 1 is at the set temperature T.

En outre, ce procédé de régulation de température permet d'utiliser un brûleur à gaz 9 dès le début du cycle de cuisson tout en ayant des résultats de traitement des composés organiques volatils très satisfaisants.In addition, this temperature control method makes it possible to use a gas burner 9 from the beginning of the firing cycle while having very satisfactory results for the treatment of volatile organic compounds.

Dans ce cas, les séquences S1 de fonctionnement pendant la durée de fonctionnement D1 de l'élément chauffant électrique 10 sont comprises dans une plage s'étendant de 5 secondes à 1 minute, et de préférence de l'ordre de 25 secondes.In this case, the operating sequences S1 during the operating time D1 of the electric heating element 10 are in a range extending from 5 seconds to 1 minute, and preferably of the order of 25 seconds.

La régulation de température de l'air contenu dans le moufle 2 pendant la première étape du cycle de chauffage est réalisée par la durée de mise en fonctionnement du brûleur à gaz 9.The regulation of the temperature of the air contained in the muffle 2 during the first step of the heating cycle is achieved by the operating time of the gas burner 9.

Dans une mode de réalisation, l'élément chauffant électrique 10 est mis en fonctionnement avec un décalage d'une durée D4 par rapport à la mise en fonctionnement du brûleur à gaz 9 lors de la première étape du procédé d'un cycle de cuisson.In one embodiment, the electric heating element 10 is operated with an offset of a duration D4 with respect to the operation of the gas burner 9 during the first step of the process of a cooking cycle.

L'élément chauffant 10 est mis en fonctionnement avec un retard d'une durée D4 s'étendant dans une plage comprise entre 1 et 30 secondes, de préférence de l'ordre de 2 secondes.The heating element 10 is operated with a delay of a duration D4 extending in a range between 1 and 30 seconds, preferably of the order of 2 seconds.

La température de consigne T est comprise entre 35 et 300°C au cours d'un programme de cuisson dans ledit four de cuisson domestique à gaz 1.The set temperature T is between 35 and 300 ° C during a cooking program in said domestic gas cooking oven 1.

Après cette première étape de chauffe de l'air contenu dans le moufle 2, une seconde étape d'arrêt du fonctionnement du au moins un brûleur à gaz 9 est exécutée pendant une durée D2.After this first step of heating the air contained in the muffle 2, a second step of stopping the operation of the at least one gas burner 9 is performed for a duration D2.

La durée d'arrêt de fonctionnement D2 du au moins un brûleur à gaz 9 est comprise dans une plage s'étendant de 1 à 8 minutes.The shutdown time D2 of the at least one gas burner 9 is in a range of 1 to 8 minutes.

L'élément chauffant électrique 10 est arrêté pendant une durée identique à la durée d'arrêt de fonctionnement D2 du au moins un brûleur à gaz 9 lors de la deuxième étape.The electric heating element 10 is stopped for a duration identical to the shutdown duration D2 of the at least one gas burner 9 during the second step.

A la suite de cet arrêt, une troisième étape de mise en fonctionnement en continu du au moins un brûleur à gaz 9 est lancée pendant une durée D3. La durée de mise en fonctionnement D3 du au moins un brûleur à gaz 9 est comprise dans une plage s'étendant de 30 secondes à 8 minutes.Following this stop, a third stage of continuous operation of the at least one gas burner 9 is launched for a duration D3. The operating time D3 of the at least one gas burner 9 is in a range from 30 seconds to 8 minutes.

L'élément chauffant électrique 10 est mis en fonctionnement de manière simultanée avec ledit au moins un brûleur à gaz 9. Ces deux moyens de chauffage 9 et 10 sont préférentiellement mis en fonctionnement de manière simultanée pour la troisième étape du procédé.The electric heating element 10 is operated simultaneously with said at least one gas burner 9. These two heating means 9 and 10 are preferably operated simultaneously for the third stage of the process.

Puis, l'étape suivante du programme est la répétition des deuxième et troisième étapes exécutées consécutivement pendant un cycle complet d'un programme de cuisson.Then, the next step of the program is the repetition of the second and third steps performed consecutively during a complete cycle of a cooking program.

La durée de fonctionnement D3 du au moins un brûleur à gaz 9 est divisée en séquences de durée S2. La durée de la séquence S2 s'étend dans une plage comprise entre 20 secondes et 2 minutes, et de préférence de l'ordre de 30 secondes.The operating time D3 of the at least one gas burner 9 is divided into sequences of duration S2. The duration of the sequence S2 extends in a range of between 20 seconds and 2 minutes, and preferably of the order of 30 seconds.

Au moins deux séquences de durée S2 peuvent être réalisées sans interruption du au moins un brûleur à gaz 9, et de préférence huit séquences S2.At least two sequences of duration S2 can be produced without interruption of the at least one gas burner 9, and preferably eight S2 sequences.

L'élément chauffant électrique 10 fonctionne en proportionnalité par rapport audit au moins un brûleur à gaz 9 de manière à respecter la température de consigne T. Le temps de fonctionnement proportionnel de l'élément chauffant 10 par rapport à la durée de fonctionnement D1 ou D3 du au moins un brûleur à gaz 9 est géré par les moyens de commande du four de cuisson domestique 1.The electric heating element 10 operates proportionally with respect to the at least one gas burner 9 so as to respect the set temperature T. The proportional operating time of the heating element 10 with respect to the operating time D1 or D3 of the at least one gas burner 9 is managed by the control means of the domestic cooking oven 1.

Les moyens de commande évaluent l'écart de température entre la température de consigne T et la valeur mesurée à l'aide d'une sonde de température. Cet écart de température mesuré permet aux moyens de commande d'alimenter l'élément chauffant électrique 10 pendant la durée nécessaire à maintenir le four de cuisson 1 à la température de consigne T et éviter d'importantes fluctuations autour de ladite température de consigne T.The control means evaluate the temperature difference between the set temperature T and the value measured by means of a temperature probe. This measured temperature difference allows the control means to supply the electric heating element 10 for the time necessary to maintain the cooking oven 1 at the set temperature T and to avoid large fluctuations around said set temperature T.

Ce principe est également utilisé lors de la phase de montée en température du four de cuisson 1 lors de la première étape. Une courbe théorique de montée en température de l'enceinte de cuisson est mémorisée par les moyens de commande. Cette courbe de montée en température est une rampe. Elle a la particularité de se terminer par une asymptote pour supprimer tout risque de montée en température excessive lors d'un défaut de fonctionnement de l'appareil. Ce mode d'apprentissage du four de cuisson 1 est réalisé en laboratoire par la Demanderesse.This principle is also used during the temperature rise phase of the cooking oven 1 during the first step. A theoretical temperature rise curve of the cooking chamber is stored by the control means. This temperature rise curve is a ramp. It has the particularity to end with an asymptote to eliminate any risk of excessive temperature rise during a malfunction of the device. This learning mode of the baking oven 1 is performed in the laboratory by the Applicant.

Un seuil maximum de temps de fonctionnement de l'élément chauffant électrique 10 est déterminé dans les paramètres de fonctionnement des moyens de commande. Ce temps de fonctionnement est compris entre 15 secondes et 2 minutes et de préférence de l'ordre de 25 secondes.A maximum operating time threshold of the electric heating element 10 is determined in the operating parameters of the control means. This operating time is between 15 seconds and 2 minutes and preferably of the order of 25 seconds.

Ensuite, les moyens de commande évaluent l'écart de température entre la consigne et la valeur mesurée et adaptent ce temps de fonctionnement en conséquence.Then, the control means evaluate the temperature difference between the setpoint and the measured value and adapt this operating time accordingly.

La gestion desdites périodes de fonctionnement peut être réalisée par un microprocesseur ayant des durées figées pour chaque programme de cuisson ou encore par des moyens de cuisson automatique.The management of said operating periods can be performed by a microprocessor having fixed durations for each cooking program or by automatic cooking means.

L'élément chauffant électrique 10 fonctionne de manière séquentielle pendant des séquences de durée S3 lors de la troisième étape du procédé. Les séquences de fonctionnement S3 pendant la durée D3 de mise en fonctionnement de l'élément chauffant électrique 10 sont comprises dans une plage s'étendant de 10 secondes à 1 minutes, et de préférence de l'ordre de 25 secondes.The electric heating element 10 operates sequentially during sequences of duration S3 during the third step of the method. The operating sequences S3 during the operating time D3 of the electric heating element 10 are in a range extending from 10 seconds to 1 minute, and preferably of the order of 25 seconds.

Par ailleurs, le moufle 2 comprend une sonde de température (non représentée) adaptée à mesurer la température de centre four. Cette sonde de température est reliée à des moyens de commande adaptés à allumer et éteindre le brûleur à gaz 9 et l'élément chauffant électrique 10 de manière à réguler la température de l'air contenu dans le moufle 2 en fonction d'une température de consigne T.Furthermore, the muffle 2 comprises a temperature probe (not shown) adapted to measure the furnace center temperature. This temperature probe is connected to control means adapted to switch on and off the gas burner 9 and the electric heating element 10 so as to regulate the temperature of the air contained in the muffle 2 as a function of a heating temperature. setpoint T.

La cellule catalytique 16 permet de supprimer la quasi-totalité des émissions de composés organiques volatiles toxiques à partir d'une montée en température de la cellule catalytique de l'ordre de 200°C.The catalytic cell 16 makes it possible to eliminate almost all the emissions of toxic volatile organic compounds from a rise in temperature of the catalytic cell of the order of 200 ° C.

Ce procédé de régulation de température permet de répondre très favorablement aux exigences normatives concernant les émissions de monoxyde de carbone et de dioxyde de carbone. Ce procédé permet de traiter la quasi-totalité des composés organiques volatils émis lors d'un cycle de cuisson.This temperature control process makes it possible to respond very favorably to the normative requirements concerning emissions of carbon monoxide and carbon dioxide. This process makes it possible to treat almost all the volatile organic compounds emitted during a cooking cycle.

De cette manière, le procédé de régulation de température permet de disposer d'un produit performant en terme de sécurité vis-à-vis de l'utilisateur puisque l'air rejeté dans la cuisine est dépourvu de gaz toxiques.In this way, the temperature control method provides a product that performs well in terms of safety vis-à-vis the user since the air released into the kitchen is devoid of toxic gases.

Les appareils de cuisson à gaz de l'état de la technique ne permettaient pas d'obtenir des performances de traitement des composés organiques volatils aussi bonnes et de garantir la sécurité des usagers puisque lesdits appareils ne disposaient pas de cellule catalytique 16 et d'un procédé de régulation de température tel que décrit précédemment.The state of the art gas cooking apparatus did not make it possible to obtain such good volatile organic compound treatment performances and to guarantee the safety of the users since said apparatus did not have a catalytic cell 16 and a temperature control method as described above.

Sur la figure 3 est illustrée l'émission de monoxyde de carbone au cours d'un programme de cuisson où la température moyenne de la cellule catalytique 16 est de 190°C. A partir de 16 minutes, l'émission de monoxyde de carbone est quasi nulle étant donné que la valeur d'émission de monoxyde de carbone maximum relevée lors des essais exécutés par la Demanderesse n'excède pas 0,02ppm.On the figure 3 carbon monoxide emission is illustrated during a cooking program where the average temperature of the catalytic cell 16 is 190 ° C. From 16 minutes, the emission of carbon monoxide is almost zero since the maximum carbon monoxide emission value found in the tests performed by the Applicant does not exceed 0.02ppm.

Par conséquent, l'émission de monoxyde de carbone en cumul sur un cycle de cuisson est quasiment nulle étant donné que le traitement intervient rapidement et efficacement après le départ du cycle.Therefore, the cumulative carbon monoxide emission over a cooking cycle is almost zero since the treatment occurs quickly and efficiently after the start of the cycle.

Dans la première partie de la courbe, la cellule catalytique 16 est activée partiellement puisque la température d'activation totale de la cellule catalytique n'est pas encore atteinte.In the first part of the curve, the catalytic cell 16 is partially activated since the total activation temperature of the catalytic cell has not yet been reached.

Cette figure 3 permet tout de même de remarquer que le monoxyde de carbone est traité rapidement après le départ du cycle de cuisson. Ce but recherché par la Demanderesse a été validé lors d'essais menés en laboratoire. La cellule catalytique 16 commence à s'activer à partir d'une durée de 4 minutes de fonctionnement de l'élément chauffant électrique 10.This figure 3 All the same, it should be noted that carbon monoxide is treated quickly after the start of the cooking cycle. This goal sought by the Applicant has been validated during laboratory tests. The catalytic cell 16 starts to activate from a duration of 4 minutes of operation of the electric heating element 10.

Sur la figure 4 est illustrée en trait mixte la régulation en température de l'air contenu dans le moufle 2, en trait pointillé fin l'évolution au cours du programme de cuisson de la température de la cellule catalytique 16, en trait pointillé large les durées de mise en fonctionnement du brûleur à gaz 9 et en trait continu les durées de mise en fonctionnement de l'élément chauffant électrique 10.On the figure 4 is shown in dot-dash the temperature regulation of the air contained in the muffle 2, in dashed line end the evolution during the cooking program of the temperature of the catalytic cell 16, in broad dotted line the duration of implementation operation of the gas burner 9 and in continuous line the operating times of the electric heating element 10.

Bien évidemment, plus la température de l'air contenu dans le moufle 2 est élevée, plus le traitement des composés organiques volatils contenus dans l'air est performant.Of course, the higher the temperature of the air contained in the muffle 2, the more efficient the treatment of volatile organic compounds contained in the air.

En outre, lors de l'extinction de la flamme du brûleur à gaz 9 les composés organiques volatils sont traités par la cellule catalytique 16. Lesdits composés organiques volatils sont traités étant donné que l'élément chauffant électrique 10 maintient la cellule catalytique à une température suffisante. Par conséquent, tout risque de danger est supprimé à l'extérieur de l'appareil de cuisson.In addition, when extinguishing the flame of the gas burner 9 the volatile organic compounds are treated by the catalytic cell 16. Said volatile organic compounds are treated since the electric heating element 10 keeps the catalytic cell at a temperature sufficient. Therefore, any risk of danger is removed outside the cooking appliance.

Le four de cuisson domestique à gaz 1 tel que décrit précédemment permet ainsi un traitement des composés organiques volatils émis dans le moufle lors d'un programme de cuisson.The domestic gas cooking oven 1 as described above thus allows a treatment of volatile organic compounds emitted in the muffle during a cooking program.

Claims (5)

  1. A method for regulating the temperature of a heating program in a gas-powered domestic cooking oven comprising a cavity (2) whose front face (3) is closed by a door (4), and comprising an upper wall (5), side walls (6), a back wall (7), and a lower wall (8), as well as at least one gas burner (9) arranged under the lower wall (8) of said cavity (2) supplied in on-or-off mode, a method whereby the phases of a heating program are divided into unitary time sequences (S), the operating period of said at least one gas burner (9) during the time sequences (S) being the longest of the durations of the unitary time sequences (S), characterized in that a minimum operating time of the gas burner (9) equal to 10 seconds or more is the necessary operating condition to ensure its full ignition in order to not release unburnt gas into the cooking cavity.
  2. A method for regulating the temperature of a heating program in a gas-powered domestic cooking oven according to claim 1, characterized in that the unitary time sequences (S) are within a range extending between 10 seconds and 1 minute, and preferably on the order of 30 seconds.
  3. A method for regulating the temperature of a heating program in a gas-powered domestic cooking oven according to any of the claims 1 to 2, characterized in that the unitary time sequences (S) are executed successively and without interruption.
  4. A method for regulating the temperature of a heating program in a gas-powered domestic cooking oven according to any of the claims 1 to 3, characterized in that said at least one gas burner (9) must be left to rest for at least 8 seconds between two ignitions in order to ensure correct ignition of said at least one gas burner (9) during the following unitary time sequence (S).
  5. A method for regulating the temperature of a heating program in a gas-powered domestic cooking oven according to one of the claims 1 to 4, characterized in that the rest period of said at least one gas burner (9) during the unitary time sequences (S) is at least 8 seconds for operation in sequential mode, and preferably on the order of 20 seconds.
EP06116154.3A 2005-06-30 2006-06-27 Method for temperature regulation of a heating program in a domestic gas cooking appliance Active EP1739360B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0506746A FR2887963B1 (en) 2005-06-30 2005-06-30 METHOD FOR CONTROLLING TEMPERATURE OF A HEATING PROGRAM IN A DOMESTIC GAS COOKING OVEN

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EP1739360A2 EP1739360A2 (en) 2007-01-03
EP1739360A3 EP1739360A3 (en) 2017-05-24
EP1739360B1 true EP1739360B1 (en) 2019-04-03

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EP (1) EP1739360B1 (en)
FR (1) FR2887963B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2308868A1 (en) * 1975-04-24 1976-11-19 Gaz De France Gas heating or cooking unit - has control pulse generator switching on and off for selected periods
FR2312750A1 (en) * 1975-05-30 1976-12-24 Gaz De France Furnace temp control system - with multiple heaters operated sequentially by programmers connected to temp monitors
JPS5883128A (en) * 1981-11-12 1983-05-18 Matsushita Electric Ind Co Ltd Heating cooker
AU1433201A (en) * 1999-10-18 2001-04-30 Allen Olson Electronic gas cooktop control with simmer system and method thereof

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
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EP1739360A2 (en) 2007-01-03
FR2887963A1 (en) 2007-01-05
EP1739360A3 (en) 2017-05-24
FR2887963B1 (en) 2017-10-06

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