EP1739361B1 - Method for temperature regulation of a pyrolytic cleaning program in a domestic gas cooking appliance - Google Patents

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

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Publication number
EP1739361B1
EP1739361B1 EP06116152.7A EP06116152A EP1739361B1 EP 1739361 B1 EP1739361 B1 EP 1739361B1 EP 06116152 A EP06116152 A EP 06116152A EP 1739361 B1 EP1739361 B1 EP 1739361B1
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EP
European Patent Office
Prior art keywords
gas
temperature
cooking oven
cleaning program
regulating
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EP06116152.7A
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German (de)
French (fr)
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EP1739361A2 (en
EP1739361A3 (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 EP1739361A3 publication Critical patent/EP1739361A3/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
    • 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
    • F24C14/025—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning pyrolytic type for gaseous fuels
    • 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
    • F24C1/00—Stoves or ranges in which the fuel or energy supply is not restricted to solid fuel or to a type covered by a single one of the following groups F24C3/00 - F24C9/00; Stoves or ranges in which the type of fuel or energy supply is not specified
    • F24C1/02—Stoves or ranges in which the fuel or energy supply is not restricted to solid fuel or to a type covered by a single one of the following groups F24C3/00 - F24C9/00; Stoves or ranges in which the type of fuel or energy supply is not specified adapted for the use of two or more kinds of fuel or energy supply
    • F24C1/04—Stoves or ranges in which the fuel or energy supply is not restricted to solid fuel or to a type covered by a single one of the following groups F24C3/00 - F24C9/00; Stoves or ranges in which the type of fuel or energy supply is not specified adapted for the use of two or more kinds of fuel or energy supply simultaneously
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2007—Removing cooking fumes from oven cavities
    • F24C15/2014—Removing cooking fumes from oven cavities with means for oxidation of cooking fumes

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 cleaning program, in particular pyrolytic.
  • 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.
  • these domestic gas cooking ovens do not include a catalytic cell for the treatment of volatile organic compounds. Therefore, these volatile organic compounds are removed from the range by a natural convection duct.
  • the purpose of the present invention is to propose a temperature control method of a pyrolysis cleaning program in a gas domestic cooking oven allowing a temperature rise of the rapid cooking chamber and giving off a level of volatile organic compounds. low, and in particular a virtually zero carbon monoxide level during cooking and cleaning programs.
  • This temperature control method of a pyrolysis cleaning program also makes it possible to verify the operation of the at least one gas burner at the start of the pyrolytic mode.
  • the present invention provides a temperature control method of a pyrolysis cleaning program 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 all-or-nothing muffle, an electric heating element fed in all or nothing disposed under the top wall of said muffle , and said upper wall of the muffle comprising an opening adapted to receive a catalytic cell.
  • 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.
  • volatile organic compounds In addition, the combustion of volatile organic compounds is reduced to a minimum and these are not discharged directly outside the stove.
  • the volatile organic compounds pass through the catalytic cell.
  • This catalytic cell makes it possible to destroy, in particular, carbon monoxide in order to reduce the emission of toxic gas to an almost zero value.
  • the domestic gas cooking oven comprises an ignition burner adapted to ignite the at least one gas burner.
  • the gas burner can be ignited automatically by said ignition burner.
  • the set temperature T may be between 450 and 510 ° C.
  • the electric heating element is operated simultaneously with said at least one gas burner to reach a temperature of about 500 ° C for pyrolytic cleaning of the muffle and the domestic cooking oven door.
  • the simultaneous operation of the heating element and the gas burner reduces the emission of volatile organic compounds.
  • This principle of operation of the heating means makes it possible to suppress the emission of volatile organic compounds from a temperature threshold.
  • said at least one gas burner is operated continuously and simultaneously with said electric heating element in the first step for a duration (P1b).
  • the ignition of said at least one gas burner from the start of the pyrolytic cleaning mode ensures the proper operation of said at least one gas burner. This step of the process makes it possible to check for possible malfunctions may occur during this cleaning program and create a check indicator of the operation of the at least one gas burner at the lowest cost.
  • this step eliminates any question that the user might ask about the proper operation of the at least one gas burner when launching this cleaning program.
  • a portion of the flames during operation of the gas burner are visible from outside the domestic gas cooking oven.
  • 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.
  • 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 supplied 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 cleaning mode and to activate at least one catalytic cell 16 the most quickly possible to remove volatile organic compounds.
  • the upper wall 5 of the muffle 2 comprises an opening 15 adapted to receive a catalytic cell 16.
  • a catalytic cell 16 In this way, the combustion gases called volatile organic compounds are not discharged directly outside the domestic cooking oven gas 1. But said volatile organic compounds pass through said catalytic cell 16 coated with palladium or 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.
  • the figure 3 is a simplified representation of a first curve of the evolution of the temperature of the cooking chamber during a pyrolysis cleaning program.
  • figure 3 the periods of operation of the electric heating element 10 and the gas burner 9 are also shown.
  • figure 3 allows to display the active and inactive periods of the heating means and for the active periods according to the sequential or continuous operating mode.
  • the second curve illustrates the operating periods of the electric heating element 10.
  • the periods of operation in sequential mode are illustrated by a dashed line and periods of continuous operation by a solid line.
  • the last curve illustrates the operating periods of the at least one gas burner 9.
  • the periods of operation in sequential mode are illustrated by a mixed line and the periods of operation in continuous mode by a solid line.
  • the process starts with a first phase triggering the start of a phase of a pyrolysis cleaning cycle in the furnace muffle 2.
  • This start can be the start of a start of a program selected by the user or delayed start.
  • the operating time P1a of the heating element 10 is in a range extending between 20 and 30 minutes, and preferably of the order of 25 minutes.
  • the electric heating element 10 operates sequentially for periods S1a of between 20 and 28 seconds in sequences S1 of the order of 30 seconds during the first step, and preferably of the order of 25 seconds.
  • Said first step of operation of 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 16 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 cleaning cycle while having very satisfactory results for the treatment of volatile organic compounds.
  • the domestic gas cooking oven 1 comprises an operating indicator means of the gas burner 9.
  • the witness means is an audible alarm or a light indicator.
  • control means is achieved by operating the gas burner 9 from the first step of the process.
  • Part of the flames during operation of the gas burner 9 are visible from outside the domestic gas cooking oven 1.
  • the flames are made visible by the arrangement of an orifice in the bottom wall 8 of the muffle 2. Said orifice is arranged so as to make visible the flames of the at least one gas burner 9 by the user.
  • Said orifice is located at a distance of between 40 mm and 150 mm from the front face 3 of the muffle 2.
  • Said orifice is preferably circular in shape and has a diameter of between 8 mm and 15 mm, and preferably of the order of 12 mm.
  • Said at least one gas burner 9 is operated continuously and simultaneously with said electric heating element 10 in the first step for a duration P1b.
  • Said at least one gas burner 9 is stopped at the end of the duration P1b.
  • This operating means of the at least one gas burner 9 is a safety means for ensuring the proper operation of the at least one gas burner 9.
  • the pyrolysis cleaning cycle is interrupted if an anomaly is detected by the means control of the domestic gas cooking oven 1 and the user is warned of the malfunction.
  • the malfunction can be detected by security means well known to those skilled in the art such as a thermocouple.
  • the operating time P1a of the electric heating element 10 is longer than the operating time P1b of the at least one gas burner 9 during the first step of the method.
  • the operating time P1b of the at least one gas burner 9 is in a range extending from 25 seconds to 3 minutes in the first step, and preferably of the order of 2 minutes.
  • the period P1b on the one hand reassures the user on the proper functioning of the at least one gas burner 9.
  • the operation of the at least one gas burner 9 during the duration P1b allows the control means to check the operating state of the at least one gas burner 9 for performing the second step of the method.
  • the set temperature T is between 450 and 510 ° C during a cleaning program of said domestic gas cooking oven 1.
  • a second step of sequential operation of the at least one gas burner 9 and operating at least in part sequentially of the heating element electrical 10 is executed for a duration P2.
  • the electric heating element 10 is operated continuously during the second step for a duration at least shorter than the duration P2 to allow the air temperature of the muffle 2 to be regulated at the set temperature T.
  • the operating time P2 of the at least one gas burner 9 and the electric heating element 10 is in a range extending from 15 to 25 minutes, and preferably of the order of 19 minutes.
  • the electric heating element 10 is operated sequentially for a duration S2a of between 0 and 30 seconds during sequences S2 of the order of 30 seconds during the second step of the method.
  • Said at least one gas burner 9 is operated sequentially for a duration S2b of between 8 and 15 seconds in sequences S2 of the order of 30 seconds during the second step of the process, and preferably 10 seconds.
  • the first two steps make it possible to increase the temperature of the cooking chamber in two parts.
  • the first step enabling the catalytic cell 16 to be activated as soon as possible by the heating element 10 located near said catalytic cell 16.
  • the second stage of temperature rise of the cooking chamber is accelerated by putting into operation at least one gas burner 9.
  • a third step of continuously operating the at least one sequential gas burner 9 of the electric heating element 10 is performed for a duration P3.
  • the operating time P3 of the at least one gas burner 9 and the electric heating element 10 is in a range extending from 60 to 90 minutes, and preferably of the order of 80 minutes.
  • the electric heating element 10 is operated sequentially for a duration S3a of between 0 and 25 seconds during sequences S3 of the order of 30 seconds during the third step of the method, and preferably of the order 24 seconds.
  • Said at least one gas burner 9 is operated continuously during sequences of the order of 30 seconds during the third step of the process.
  • the electric heating element 10 is operated simultaneously with the at least one gas burner 9. These two heating means 9 and 10 are preferably operated simultaneously for the second and the third stage of the process.
  • the electric heating element 10 operates proportionally during steps 2 and 3 so as to regulate the temperature of the muffle 2 as a function of the set temperature T.
  • the proportional operating time of the heating element 10 with respect to the operating time P2 or P3 of the at least one gas burner 9 is controlled 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 24 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 carried out by a microprocessor having fixed durations for each cleaning program or by means of automation of the cleaning mode.
  • 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 method of controlling temperature during a pyrolysis cleaning mode concludes with a fourth step of stopping said electric heating element 10 and at least one gas burner 9.
  • 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 cleaning 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 domestic gas cooking oven 1 as described above thus allows a treatment of the volatile organic compounds emitted in the muffle during a pyrolysis cleaning program.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (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 nettoyage, en particulier pyrolytique.In general, the present invention relates to the operation of a domestic gas cooking oven during a cleaning program, in particular pyrolytic.

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.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.

En outre, ces fours de cuisson domestiques à gaz ne comprennent pas de cellule catalytique pour le traitement des composés organiques volatils. Par conséquent, ces composés organiques volatils sont évacués de la cuisinière par un conduit en convection naturelle.In addition, these domestic gas cooking ovens do not include a catalytic cell for the treatment of volatile organic compounds. Therefore, these volatile organic compounds are removed from the range by a natural convection duct.

Les documents US 3423568 et US 3480000 représentent l'état de l'art pertinent par rapport à la présente invention.The documents US 3423568 and US 3480000 represent the state of the art relevant to the present invention.

La présente invention a pour but de proposer un procédé de régulation de température d'un programme de nettoyage par pyrolyse dans un four de cuisson domestique à gaz permettant une montée en température de l'enceinte de cuisson rapide et dégageant un taux de composés organiques volatils faible, et en particulier un taux de monoxyde de carbone quasi nul pendant les programmes de cuisson et de nettoyage.The purpose of the present invention is to propose a temperature control method of a pyrolysis cleaning program in a gas domestic cooking oven allowing a temperature rise of the rapid cooking chamber and giving off a level of volatile organic compounds. low, and in particular a virtually zero carbon monoxide level during cooking and cleaning programs.

Ce procédé de régulation de température d'un programme de nettoyage par pyrolyse permet également de vérifier le fonctionnement du au moins un brûleur à gaz au démarrage du mode pyrolytique.This temperature control method of a pyrolysis cleaning program also makes it possible to verify the operation of the at least one gas burner at the start of the pyrolytic mode.

A cet effet, la présente invention vise un procédé de régulation de température d'un programme de nettoyage par pyrolyse 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, un élément chauffant électrique alimenté en tout ou rien disposé sous la paroi supérieure dudit moufle, et ladite paroi supérieure du moufle comprenant une ouverture adaptée à recevoir une cellule catalytique.For this purpose, the present invention provides a temperature control method of a pyrolysis cleaning program 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 all-or-nothing muffle, an electric heating element fed in all or nothing disposed under the top wall of said muffle , and said upper wall of the muffle comprising an opening adapted to receive a catalytic cell.

Selon l'invention, ce procédé de régulation de température d'un programme de nettoyage par pyrolyse dans un four de cuisson domestique à gaz comprend les étapes suivantes :

  • une première étape de montée en température de l'air contenu dans le moufle par le fonctionnement séquentiel d'un élément chauffant électrique jusqu'à une température de consigne (T) pendant une durée (P1a) ;
  • une seconde étape de mise en fonctionnement séquentiel du au moins un brûleur à gaz et de mise en fonctionnement au moins en partie en séquentiel de l'élément chauffant électrique pendant une durée (P2) ;
  • une troisième étape de mise en fonctionnement en continu du au moins un brûleur à gaz et séquentielle de l'élément chauffant électrique pendant une durée (P3) ; et
  • une quatrième étape d'arrêt de fonctionnement desdits un élément chauffant électrique et au moins un brûleur à gaz.
According to the invention, this method of controlling the temperature of a pyrolysis cleaning program in a domestic gas cooking oven comprises the following steps:
  • a first step of raising the temperature of the air contained in the muffle by sequential operation of an electric heating element to a set temperature (T) for a duration (P1a);
  • a second step of sequentially operating the at least one gas burner and operating at least in part sequentially the electric heating element for a period (P2);
  • a third step of continuously operating the at least one sequential gas burner of the electric heating element for a duration (P3); and
  • a fourth step of stopping operation of said electric heating element and at least one gas burner.

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.

En outre, la combustion de composés organiques volatils est réduite au strict minimum et ceux-ci ne sont pas rejetés directement à l'extérieur de la cuisinière. Les composés organiques volatils passent au travers de la cellule catalytique.In addition, the combustion of volatile organic compounds is reduced to a minimum and these are not discharged directly outside the stove. The volatile organic compounds pass through the catalytic cell.

Cette cellule catalytique permet de détruire notamment le monoxyde de carbone afin de réduire l'émission de gaz toxique à une valeur quasi nulle.This catalytic cell makes it possible to destroy, in particular, carbon monoxide in order to reduce the emission of toxic gas to an almost zero value.

De manière avantageuse, le four de cuisson domestique à gaz comprend un brûleur d'allumage adapté à allumer ledit au moins un brûleur à gaz.Advantageously, the domestic gas cooking oven comprises an ignition burner adapted to ignite the at least one gas burner.

Ainsi, le brûleur à gaz peut être allumé automatiquement grâce audit brûleur d'allumage.Thus, the gas burner can be ignited automatically by said ignition burner.

Au cours d'un programme de nettoyage dudit four de cuisson domestique à gaz, la température de consigne T peut être comprise entre 450 et 510°C.During a cleaning program of said domestic gas cooking oven, the set temperature T may be between 450 and 510 ° C.

De préférence, l'élément chauffant électrique est mis en fonctionnement de manière simultanée avec ledit au moins un brûleur à gaz pour atteindre une température de l'ordre de 500 °C pour le nettoyage pyrolytique du moufle et de la porte four de cuisson domestique.Preferably, the electric heating element is operated simultaneously with said at least one gas burner to reach a temperature of about 500 ° C for pyrolytic cleaning of the muffle and the domestic cooking oven door.

La mise en fonctionnement simultanée de l'élément chauffant et du brûleur à gaz permet de réduire l'émission de composés organiques volatils. Ce principe de fonctionnement des moyens de chauffage permet de supprimer l'émission des composés organiques volatils à partir d'un seuil de température.The simultaneous operation of the heating element and the gas burner reduces the emission of volatile organic compounds. This principle of operation of the heating means makes it possible to suppress the emission of volatile organic compounds from a temperature threshold.

Selon une caractéristique préférée de l'invention, ledit au moins un brûleur à gaz est mis en fonctionnement en continu et en simultané avec ledit élément chauffant électrique à la première étape pendant une durée (P1b).According to a preferred feature of the invention, said at least one gas burner is operated continuously and simultaneously with said electric heating element in the first step for a duration (P1b).

L'allumage dudit au moins un brûleur à gaz dès le départ du mode de nettoyage pyrolytique permet de s'assurer du bon fonctionnement dudit au moins un brûleur à gaz. Cette étape du procédé permet de s'assurer de défauts de fonctionnement éventuels pouvant survenir lors de ce programme de nettoyage et de créer un témoin de vérification du fonctionnement du au moins un brûleur à gaz au plus bas coût.The ignition of said at least one gas burner from the start of the pyrolytic cleaning mode ensures the proper operation of said at least one gas burner. This step of the process makes it possible to check for possible malfunctions may occur during this cleaning program and create a check indicator of the operation of the at least one gas burner at the lowest cost.

De plus, cette étape supprime toute interrogation que pourrait se poser l'utilisateur sur le bon fonctionnement du au moins un brûleur à gaz lors du lancement de ce programme de nettoyage.In addition, this step eliminates any question that the user might ask about the proper operation of the at least one gas burner when launching this cleaning program.

De préférence, une partie des flammes lors du fonctionnement du brûleur à gaz sont visibles depuis l'extérieur du four de cuisson domestique à gaz.Preferably, a portion of the flames during operation of the gas burner are visible from outside the domestic gas cooking oven.

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 ; et
  • la figure 3 est un graphique illustrant les périodes de fonctionnement des moyens de chauffage au cours du procédé conforme à l'invention.
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; and
  • the figure 3 is a graph illustrating the operating periods of the heating means during the process according to the invention.

On va décrire tout d'abord, en référence à la figure 1, 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 describe first, with reference to the figure 1 , 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 nettoyage 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 supplied 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 cleaning mode and to activate at least one catalytic cell 16 the most quickly possible to remove 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 a catalytic cell 16. In this way, the combustion gases called volatile organic compounds are not discharged directly outside the domestic cooking oven gas 1. But said volatile organic compounds pass through said catalytic cell 16 coated with palladium or 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.

On va décrire à présent, en référence à la figure 3, le procédé de régulation de température d'un programme de nettoyage par pyrolyse dans un four de cuisson domestique à gaz conforme à l'invention.We will now describe, with reference to the figure 3 , the temperature control method of a pyrolysis cleaning program in a domestic gas cooking oven according to the invention.

La figure 3 représente de manière simplifiée une première courbe de l'évolution de la température de l'enceinte de cuisson au cours d'un programme de nettoyage par pyrolyse.The figure 3 is a simplified representation of a first curve of the evolution of the temperature of the cooking chamber during a pyrolysis cleaning program.

Sur cette figure 3 est aussi représenté les périodes de fonctionnement de l'élément chauffant électrique 10 et du brûleur à gaz 9. La figure 3 permet de visualiser les périodes actives et inactives des moyens de chauffage et pour les périodes actives suivant le mode de fonctionnement séquentiel ou continu.On this figure 3 the periods of operation of the electric heating element 10 and the gas burner 9 are also shown. figure 3 allows to display the active and inactive periods of the heating means and for the active periods according to the sequential or continuous operating mode.

La seconde courbe illustre les périodes de fonctionnement de l'élément chauffant électrique 10. Les périodes de fonctionnement en mode séquentiel sont illustrées par un trait en pointillé et les périodes de fonctionnement en mode continu par un trait plein.The second curve illustrates the operating periods of the electric heating element 10. The periods of operation in sequential mode are illustrated by a dashed line and periods of continuous operation by a solid line.

Et la dernière courbe illustre les périodes de fonctionnement du au moins un brûleur à gaz 9. Les périodes de fonctionnement en mode séquentiel sont illustrées par un trait mixte et les périodes de fonctionnement en mode continu par un trait plein.And the last curve illustrates the operating periods of the at least one gas burner 9. The periods of operation in sequential mode are illustrated by a mixed line and the periods of operation in continuous mode by a solid line.

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 nettoyage par pyrolyse 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 used, for example, during the firing step, the process starts with a first phase triggering the start of a phase of a pyrolysis cleaning cycle in the furnace muffle 2. domestic cooking gas 1. This start can be the start of a start of a program selected by the user or delayed start.

Ensuite, une première étape de montée en température de l'air contenu dans le moufle 2 par le fonctionnement séquentiel d'un élément chauffant électrique 10 jusqu'à une température de consigne T pendant une durée P1a.Then, a first step of increasing the temperature of the air contained in the muffle 2 by the sequential operation of an electric heating element 10 to a set temperature T for a duration P1a.

La durée de fonctionnement P1a de l'élément chauffant 10 est comprise dans une plage s'étendant entre 20 et 30 minutes, et de préférence de l'ordre de 25 minutes.The operating time P1a of the heating element 10 is in a range extending between 20 and 30 minutes, and preferably of the order of 25 minutes.

L'élément chauffant électrique 10 fonctionne de manière séquentielle pendant des périodes S1a comprises entre 20 et 28 secondes lors de séquences S1 de l'ordre de 30 secondes au cours de la première étape, et de préférence de l'ordre de 25 secondes.The electric heating element 10 operates sequentially for periods S1a of between 20 and 28 seconds in sequences S1 of the order of 30 seconds during the first step, and preferably of the order of 25 seconds.

Ladite première étape de fonctionnement de l'élément chauffant électrique 10 correspond à la phase de préchauffage du moufle 2.Said first step of operation of 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 16 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 16 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 nettoyage 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 cleaning cycle while having very satisfactory results for the treatment of volatile organic compounds.

Le four de cuisson domestique à gaz 1 comprend un moyen de témoin de fonctionnement du brûleur à gaz 9.The domestic gas cooking oven 1 comprises an operating indicator means of the gas burner 9.

Le moyen de témoin est une alarme sonore ou encore un voyant lumineux.The witness means is an audible alarm or a light indicator.

De préférence, le moyen de témoin est réalisé par la mise en fonctionnement du brûleur à gaz 9 au départ de la première étape du procédé.Preferably, the control means is achieved by operating the gas burner 9 from the first step of the process.

Une partie des flammes lors du fonctionnement du brûleur à gaz 9 sont visibles depuis l'extérieur du four de cuisson domestique à gaz 1.Part of the flames during operation of the gas burner 9 are visible from outside the domestic gas cooking oven 1.

Les flammes sont rendues visibles par l'aménagement d'un orifice dans la paroi inférieure 8 du moufle 2. Ledit orifice est disposé de manière à rendre visible les flammes du au moins un brûleur à gaz 9 par l'utilisateur.The flames are made visible by the arrangement of an orifice in the bottom wall 8 of the muffle 2. Said orifice is arranged so as to make visible the flames of the at least one gas burner 9 by the user.

Ledit orifice se situe à une distance comprise entre 40mm et 150mm de la face frontale 3 du moufle 2. Ledit orifice est préférentiellement de forme circulaire et de diamètre compris entre 8mm et 15mm, et de préférence de l'ordre de 12mm.Said orifice is located at a distance of between 40 mm and 150 mm from the front face 3 of the muffle 2. Said orifice is preferably circular in shape and has a diameter of between 8 mm and 15 mm, and preferably of the order of 12 mm.

Ledit au moins un brûleur à gaz 9 est mis en fonctionnement en continu et en simultané avec ledit élément chauffant électrique 10 à la première étape pendant une durée P1b.Said at least one gas burner 9 is operated continuously and simultaneously with said electric heating element 10 in the first step for a duration P1b.

Ledit au moins un brûleur à gaz 9 est arrêté à la fin de la durée P1b.Said at least one gas burner 9 is stopped at the end of the duration P1b.

Ce moyen de fonctionnement du au moins un brûleur à gaz 9 est un moyen de sécurité permettant de s'assurer du bon fonctionnement du au moins un brûleur à gaz 9. Le cycle de nettoyage par pyrolyse est interrompu si une anomalie est détectée par les moyens de commande du four de cuisson domestique à gaz 1 et l'utilisateur est prévenu du dysfonctionnement.This operating means of the at least one gas burner 9 is a safety means for ensuring the proper operation of the at least one gas burner 9. The pyrolysis cleaning cycle is interrupted if an anomaly is detected by the means control of the domestic gas cooking oven 1 and the user is warned of the malfunction.

Le dysfonctionnement peut être détecté par des moyens de sécurité bien connus de l'homme du métier tels qu'un thermocouple.The malfunction can be detected by security means well known to those skilled in the art such as a thermocouple.

La durée de mise en fonctionnement P1a de l'élément chauffant électrique 10 est plus longue que la durée de mise en fonctionnement P1b du au moins un brûleur à gaz 9 lors de la première étape du procédé.The operating time P1a of the electric heating element 10 is longer than the operating time P1b of the at least one gas burner 9 during the first step of the method.

La durée de mise en fonctionnement P1b du au moins un brûleur à gaz 9 est comprise dans une plage s'étendant de 25 secondes à 3 minutes lors de la première étape, et de préférence de l'ordre de 2 minutes.The operating time P1b of the at least one gas burner 9 is in a range extending from 25 seconds to 3 minutes in the first step, and preferably of the order of 2 minutes.

La période P1b permet d'une part de rassurer l'utilisateur sur le bon fonctionnement du au moins un brûleur à gaz 9.The period P1b on the one hand reassures the user on the proper functioning of the at least one gas burner 9.

D'autre part, le fonctionnement du au moins un brûleur à gaz 9 pendant la durée P1b permet aux moyens de commande de vérifier l'état de fonctionnement dudit au moins un brûleur à gaz 9 pour l'exécution de la seconde étape du procédé.On the other hand, the operation of the at least one gas burner 9 during the duration P1b allows the control means to check the operating state of the at least one gas burner 9 for performing the second step of the method.

La température de consigne T est comprise entre 450 et 510°C au cours d'un programme de nettoyage dudit four de cuisson domestique à gaz 1.The set temperature T is between 450 and 510 ° C during a cleaning program of said domestic gas cooking oven 1.

Après cette première étape de chauffe de l'air contenu dans le moufle 2, une seconde étape de mise en fonctionnement séquentiel du au moins un brûleur à gaz 9 et de mise en fonctionnement au moins en partie en séquentiel de l'élément chauffant électrique 10 est exécutée pendant une durée P2.After this first step of heating the air contained in the muffle 2, a second step of sequential operation of the at least one gas burner 9 and operating at least in part sequentially of the heating element electrical 10 is executed for a duration P2.

L'élément chauffant électrique 10 est mis en fonctionnement en continu lors de la deuxième étape pendant une durée au moins plus courte que la durée P2 pour permettre de réguler la température de l'air du moufle 2 à la température de consigne T.The electric heating element 10 is operated continuously during the second step for a duration at least shorter than the duration P2 to allow the air temperature of the muffle 2 to be regulated at the set temperature T.

La durée de mise en fonctionnement P2 du au moins un brûleur à gaz 9 et de l'élément chauffant électrique 10 est comprise dans une plage s'étendant de 15 à 25 minutes, et de préférence de l'ordre de 19 minutes.The operating time P2 of the at least one gas burner 9 and the electric heating element 10 is in a range extending from 15 to 25 minutes, and preferably of the order of 19 minutes.

L'élément chauffant électrique 10 est mis en fonctionnement de manière séquentielle pendant une durée S2a comprise entre 0 et 30 secondes lors de séquences S2 de l'ordre de 30 secondes au cours de la deuxième étape du procédé.The electric heating element 10 is operated sequentially for a duration S2a of between 0 and 30 seconds during sequences S2 of the order of 30 seconds during the second step of the method.

Ledit au moins un brûleur à gaz 9 est mis en fonctionnement de manière séquentielle pendant une durée S2b comprise entre 8 et 15 secondes lors de séquences S2 de l'ordre de 30 secondes au cours de la deuxième étape du procédé, et de préférence de l'ordre de 10 secondes.Said at least one gas burner 9 is operated sequentially for a duration S2b of between 8 and 15 seconds in sequences S2 of the order of 30 seconds during the second step of the process, and preferably 10 seconds.

Les deux premières étapes permettent de réaliser une montée en température de l'enceinte de cuisson en deux parties. La première étape permettant d'activer au plus tôt la cellule catalytique 16 par l'élément chauffant 10 situé à proximité de ladite cellule catalytique 16. Et la deuxième étape de montée en température de l'enceinte de cuisson est accélérée par la mise en fonctionnement du au moins un brûleur à gaz 9.The first two steps make it possible to increase the temperature of the cooking chamber in two parts. The first step enabling the catalytic cell 16 to be activated as soon as possible by the heating element 10 located near said catalytic cell 16. And the second stage of temperature rise of the cooking chamber is accelerated by putting into operation at least one gas burner 9.

A la suite de cette deuxième étape, une troisième étape de mise en fonctionnement en continu du au moins un brûleur à gaz 9 et séquentielle de l'élément chauffant électrique 10 est exécutée pendant une durée P3.Following this second step, a third step of continuously operating the at least one sequential gas burner 9 of the electric heating element 10 is performed for a duration P3.

La durée de mise en fonctionnement P3 du au moins un brûleur à gaz 9 et de l'élément chauffant électrique 10 est comprise dans une plage s'étendant de 60 à 90 minutes, et de préférence de l'ordre de 80 minutes.The operating time P3 of the at least one gas burner 9 and the electric heating element 10 is in a range extending from 60 to 90 minutes, and preferably of the order of 80 minutes.

L'élément chauffant électrique 10 est mis en fonctionnement de manière séquentielle pendant une durée S3a comprise entre 0 et 25 secondes lors de séquences S3 de l'ordre de 30 secondes au cours de la troisième étape du procédé, et de préférence de l'ordre de 24 secondes.The electric heating element 10 is operated sequentially for a duration S3a of between 0 and 25 seconds during sequences S3 of the order of 30 seconds during the third step of the method, and preferably of the order 24 seconds.

Ledit au moins un brûleur à gaz 9 est mis en fonctionnement de manière continue lors de séquences de l'ordre de 30 secondes au cours de la troisième étape du procédé.Said at least one gas burner 9 is operated continuously during sequences of the order of 30 seconds during the third step of the process.

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 deuxième et la troisième étape du procédé.The electric heating element 10 is operated simultaneously with the at least one gas burner 9. These two heating means 9 and 10 are preferably operated simultaneously for the second and the third stage of the process.

L'élément chauffant électrique 10 fonctionne de manière proportionnelle lors des étapes 2 et 3 de manière à réguler la température du moufle 2 en fonction de la température de consigne T.The electric heating element 10 operates proportionally during steps 2 and 3 so as to regulate the temperature of the muffle 2 as a function of the set temperature T.

Le temps de fonctionnement proportionnel de l'élément chauffant 10 par rapport à la durée de fonctionnement P2 ou P3 du au moins un brûleur à gaz 9 est géré par les moyens de commande du four de cuisson domestique 1.The proportional operating time of the heating element 10 with respect to the operating time P2 or P3 of the at least one gas burner 9 is controlled 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 24 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 24 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 nettoyage ou encore par des moyens d'automatisation du mode de nettoyage.The management of said operating periods can be carried out by a microprocessor having fixed durations for each cleaning program or by means of automation of the cleaning mode.

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.

Le procédé de régulation de température lors d'un mode de nettoyage par pyrolyse se conclut par une quatrième étape d'arrêt de fonctionnement desdits un élément chauffant électrique 10 et au moins un brûleur à gaz 9.The method of controlling temperature during a pyrolysis cleaning mode concludes with a fourth step of stopping said electric heating element 10 and at least one gas burner 9.

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 nettoyage.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 cleaning 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.

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 nettoyage par pyrolyse.The domestic gas cooking oven 1 as described above thus allows a treatment of the volatile organic compounds emitted in the muffle during a pyrolysis cleaning program.

Claims (20)

  1. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven comprising a cavity (2) whose front surface (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 with gas in on-or-off mode, an electric heating element (10) supplied in on-or-off mode arranged under the upper wall (5) of said cavity (2), and said upper wall (5) of the cavity (2) comprising an opening (15) equipped with a catalytic cell (16), characterized in that the method for regulating the temperature of a pyrolysis cleaning program comprises the following steps:
    - a first step of raising the temperature of the air contained in the cavity (2) by the sequential operation of an electric heating element (10) to a set point temperature (T) for a duration (P1a);
    - a second step of sequentially turning on at least one gas burner (9) and at least partly sequentially turning on the electric heating element (10) for a duration (P2);
    - a third step of continuously turning on at least one gas burner (9) and sequentially turning on the electric heating element (10) for a duration (P3); and
    - a fourth step of turning off said electric heating element (10) and at least one gas burner (9).
  2. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to claim 1, characterized in that said at least one gas burner (9) is turned on continuously and simultaneously with said electric heating element (10) in the first step for a duration (P1b).
  3. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to claim 2, characterized in that said at least one gas burner (9) is turned off at the end of the duration (P1b).
  4. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to one of the claims 1 to 3, characterized in that the electric heating element (10) is turned on continuously during the second step for a period at least shorter than the duration (P2) in order to regulate the air temperature of the cavity (2) at the setpoint temperature (T).
  5. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to one of the claims 1 to 4, characterized in that the setpoint temperature (T) is between 450 and 510°C during a cleaning program of said gas-powered domestic cooking oven (1).
  6. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to one of the claims 1 to 5, characterized in that the operating duration (P1a) of the heating element (10) is in a range of between 20 and 30 minutes, and preferably on the order of 25 minutes.
  7. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to one of the claims 1 to 6, characterized in that the electric heating element (10) operates sequentially for periods (S1a) of between 20 and 28 seconds during sequences (S1) on the order of 30 seconds during the first step, and preferably on the order of 25 seconds.
  8. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to one of the claims 1 to 7, characterized in that the operating duration (P1a) of the heating element (10) is longer than the operating duration (P1b) of at least one gas burner (9) during the first step of the method.
  9. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to one of the claims 1 to 8, characterized in that the operating duration (P1b) of the at least one gas burner (9) is in a range of between 25 secondes and 3 minutes during the first step, and preferably on the order of 2 minutes.
  10. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to one of the claims 1 to 9, characterized in that the operating duration (P2) of the at least one gas burner (9) and the electric heating element (10) is in a range of between 15 and 25 minutes, and preferably on the order of 19 minutes.
  11. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to one of the claims 1 to 9, characterized in that the electric heating element (10) is turned on sequentially for a period (S2a) of between 0 and 30 seconds during sequences (S2) on the order of 30 seconds during the second step of the method.
  12. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to one of the claims 1 to 10, characterized in that said at least one gas burner (9) is turned on sequentially for a period (S2b) of between 8 and 15 seconds during sequences (S2) on the order of 30 seconds during the second step of the method, and preferably on the order of 10 seconds.
  13. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to any one of the preceding claims, characterized in that the operating duration (P3) of the at least one gas burner (9) and the electric heating element (10) is in a range of between 60 and 90 minutes, and preferably on the order of 80 minutes.
  14. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to any one of the preceding claims, characterized in that the electric heating element (10) is turned on sequentially for a period (S3a) of between 0 and 25 seconds in sequences (S3) on the order of 30 seconds during the third step of the method, and preferably on the order of 24 seconds.
  15. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to any one of the preceding claims, characterized in that said at least one gas burner (9) is turned on continuously in sequences on the order of 30 seconds during the third step of the method.
  16. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to any one of the preceding claims, characterized in that the electric heating element (10) operates proportionally during steps 2 and 3 so as to regulate the temperature of the cavity (2) based on the setpoint temperature (T).
  17. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to any one of the preceding claims, characterized in that the gas-powered domestic cooking oven (1) comprises control means suited for turning 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 cavity (2) based on a setpoint temperature (T).
  18. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to any one of the preceding claims, characterized in that the gas-powered domestic cooking oven (1) comprises a means of indicating the operation of the gas burner (9).
  19. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to claim 18, characterized in that the means of indication is performed by turning on the gas burner (9) at the start of the first step of the method.
  20. A method for regulating the temperature of a pyrolysis cleaning program in a gas-powered domestic cooking oven according to claim 18, characterized in that part of the flames during the operation of the gas burner (9) are visible from the outside of the gas-powered domestic cooking oven (1).
EP06116152.7A 2005-06-30 2006-06-27 Method for temperature regulation of a pyrolytic cleaning program in a domestic gas cooking appliance Active EP1739361B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0506748A FR2887965B1 (en) 2005-06-30 2005-06-30 METHOD FOR TEMPERATURE CONTROL OF A PYROLYSIS CLEANING PROGRAM IN A DOMESTIC GAS COOKING OVEN

Publications (3)

Publication Number Publication Date
EP1739361A2 EP1739361A2 (en) 2007-01-03
EP1739361A3 EP1739361A3 (en) 2017-05-31
EP1739361B1 true EP1739361B1 (en) 2018-11-07

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Application Number Title Priority Date Filing Date
EP06116152.7A Active EP1739361B1 (en) 2005-06-30 2006-06-27 Method for temperature regulation of a pyrolytic cleaning program in a domestic gas cooking appliance

Country Status (2)

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EP (1) EP1739361B1 (en)
FR (1) FR2887965B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201700035167A1 (en) * 2017-03-30 2018-09-30 Ing Polin & C S P A Oven for cooking food and heating an oven for cooking food

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3423568A (en) * 1966-08-22 1969-01-21 Tappan Co The Electric and gas self-cleaning oven
US3437085A (en) * 1967-03-01 1969-04-08 American Gas Ass Self-cleaning gas oven system and gas burner means therefor
US3480000A (en) * 1968-05-31 1969-11-25 Roper Corp Geo D Self-cleaning gas oven
US6222163B1 (en) * 1999-10-13 2001-04-24 Maytag Corporation Gas oven incorporating auxiliary electric heating element

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
FR2887965A1 (en) 2007-01-05
EP1739361A2 (en) 2007-01-03
FR2887965B1 (en) 2007-08-17
EP1739361A3 (en) 2017-05-31

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