EP2409571B1 - Betriebssteuerungsverfahren eines Dampfbackofens, und entsprechender Backofen - Google Patents

Betriebssteuerungsverfahren eines Dampfbackofens, und entsprechender Backofen Download PDF

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Publication number
EP2409571B1
EP2409571B1 EP20110173766 EP11173766A EP2409571B1 EP 2409571 B1 EP2409571 B1 EP 2409571B1 EP 20110173766 EP20110173766 EP 20110173766 EP 11173766 A EP11173766 A EP 11173766A EP 2409571 B1 EP2409571 B1 EP 2409571B1
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EP
European Patent Office
Prior art keywords
water
hydraulic circuit
steam
steam generator
cooking
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Application number
EP20110173766
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English (en)
French (fr)
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EP2409571A1 (de
Inventor
Nicolas Genieux
Stéphane Chalus
Sébastien GENEVIER
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FagorBrandt SAS
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FagorBrandt SAS
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Publication of EP2409571A1 publication Critical patent/EP2409571A1/de
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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
    • F24C15/00—Details
    • F24C15/32—Arrangements of ducts for hot gases, e.g. in or around baking ovens
    • F24C15/322—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation
    • F24C15/327—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation with air moisturising

Definitions

  • the present invention relates to a control method in operation of a cooking oven using steam to display a duration of emptying according to the determination of the water consumption of a steam generator.
  • It also relates to a cooking oven, such as a domestic cooking oven, adapted to implement the control method according to the invention.
  • the present invention generally relates to the emptying of a hydraulic circuit of a cooking oven using steam.
  • Cooking ovens are already known comprising a cooking cavity housed in a bodywork, a hydraulic circuit, a steam generator supplied with water from said hydraulic circuit and producing steam to be diffused in said cooking cavity, a control unit in which operating at least said steam generator, and a draining device of said hydraulic circuit.
  • the hydraulic circuit can be drained by inserting a connecting pipe whose first end is connected to the water drain opening, located at the bottom of the cooking oven, so as to open a valve. And the second end of the connecting pipe is disposed by the user in a water collection container.
  • a draining device makes it possible to drain a hydraulic circuit of a cooking oven by gravity.
  • the draining of the hydraulic circuit can be achieved by positioning a water collection container at a water drain opening, which can be on the front face of the cooking oven or inside the cavity. cooking and then activating a drain pump by means of a control panel selection element.
  • the user performs a draining of the hydraulic circuit and is neither informed of the quantity of water remaining in the hydraulic circuit nor informed of the duration of draining of the hydraulic circuit.
  • a water level measuring device is positioned at a water reservoir of the hydraulic circuit so as to measure the water level in the hydraulic circuit.
  • this water level measurement in the water tank of the hydraulic circuit is used to emit a visual and / or audible signal when the water level is low.
  • this water level measurement in the water reservoir of the hydraulic circuit is used to display the evolution of the water level in the water tank of the hydraulic circuit depending on the level of water detected by the water level measuring device, in particular by means of a bar graph display.
  • EP 1 943 902 A1 discloses a steaming cooking furnace comprising a cooking cavity housed in a bodywork, a hydraulic circuit, a steam generator supplied with water from said hydraulic circuit and producing steam to diffuse into said cooking cavity, said generator steam forming an integral part of said hydraulic circuit, a control unit in operation of at least said steam generator; and a device for emptying said hydraulic circuit.
  • the object of the present invention is to solve the aforementioned drawbacks and to propose a control method in operation of a cooking oven using steam, as well as a cooking oven adapted to implement this method, making it possible to display the emptying time according to the quantity of water contained in the hydraulic circuit of the cooking oven without the use of a water level measuring device placed in the hydraulic circuit of the cooking oven.
  • the operating control method of a cooking oven using steam makes it possible to display the emptying time of a hydraulic circuit of the cooking oven as a function of the determination of the quantity of water consumed by a generator of steam and the predetermined amount of water for filling the hydraulic circuit with water.
  • said step of determining a quantity of water consumed by said steam generator is implemented by means of a measurement by said control unit of at least one operating parameter of an element integral with said hydraulic circuit.
  • the operating control method of a cooking oven using steam is able to determine the water consumption of the steam generator by measuring at least one operating parameter of an element that is an integral part of the steam generator. hydraulic circuit and without the use of a water level measuring device placed in the hydraulic circuit.
  • Such a control method makes it possible to determine the water consumption of the steam generator which is an integral part of the hydraulic circuit of the cooking oven and to determine a draining time of the hydraulic circuit by making only a measurement via the control unit of the oven. cooking at least one operating parameter of an element forming an integral part of the hydraulic circuit.
  • said at least one operating parameter of an element forming an integral part of said hydraulic circuit measured by said control unit during the step of determining a quantity of water consumed by said steam generator is dependent on the duration of activation of said element.
  • the baking oven comprises at least one means for selecting at least one pre-programmed emptying cycle adapted to implement the control method according to the invention.
  • This baking oven has characteristics and advantages similar to those described above in relation to the control method according to the invention.
  • such a cooking oven which may be a domestic cooking oven comprising at least one hydraulic circuit provided with at least one steam generator, a draining device, makes it possible to propose at least one pre-programmed draining cycle.
  • This pre-programmed drain cycle can be provided to systematically drain all the water contained in the hydraulic circuit of the baking oven at the end of each cooking cycle using steam.
  • This cooking oven is preferably a cooking oven for domestic use.
  • the present invention applies to all types of baking oven, and in particular flush and free installation, or included in a cooking appliance optionally comprising a hob.
  • the baking oven 1 comprises a cooking cavity 2 housed in a body 3.
  • the body 3 of the baking oven 1 comprises an upper wall 3a, a bottom wall 3b, two side walls 3c and a bottom wall 3d.
  • the cooking cavity 2 comprises an upper wall 2a, a bottom wall 2b, two side walls 2c and a bottom wall 2d.
  • the cooking cavity 2 comprises an access opening 4 on the front face 5 allowing the loading and unloading of food to be cooked and / or heated.
  • the access opening 4 of the cooking cavity 2 is closed by a door 6.
  • the door 6 is movable between an open position and a closed position by means of hinges (not shown).
  • the door 6 is pivotally mounted about an axis of rotation integral with the body 3 of the baking oven 1.
  • the door 6 closing the access opening 4 of the cooking cavity 2 can be operated by means of a handle 9.
  • the cooking oven 1 comprises a control panel 7.
  • This control panel 7 comprises selection means 8 for a cooking cycle implemented by the cooking oven 1.
  • the selection means 8 of the control panel 7 make it possible to define cooking parameters, such as, for example, a cooking temperature, a cooking time, a cooking mode.
  • the selection means 8 of the control panel 7 also make it possible to select an operation of the cooking oven 1 in a manual mode where the user defines the various cooking parameters, or an automated mode where the user can select cooking cycles. predefined by the oven manufacturer 1.
  • These selection means 8 of a cooking cycle can comprise in particular sensitive keys, push buttons and / or joysticks.
  • the means for selecting a cooking cycle of the control panel are in no way limiting and may be different.
  • the control panel 7 also includes display means to inform the user about the operating state of the cooking oven 1.
  • These display means of the control panel 7 may include one or more displays and / or one or more lights.
  • control panel the display means of the control panel are in no way limiting and may be different.
  • control panel 7 of the baking oven 1 is positioned above the door 6 closing the access opening 4 of the cooking cavity 2.
  • control panel of the cooking oven is in no way limiting and may be different, in particular positioned below the door or integrated in the door handle.
  • the baking oven 1 comprises a control unit 10 for operating the baking oven 1.
  • the control unit 10 comprises at least one microcontroller.
  • the control unit 10 makes it possible to communicate with the control panel 7, and in particular with the selection means 8 and the display means.
  • the cooking cavity 2 is adapted to cook and / or heat food by diffusion of heat inside said cooking cavity 2.
  • the baking oven 1 comprises heating means.
  • the heating means of the cooking oven 1 comprise at least one steam generator 11.
  • the steam generator 11 comprises at least one heating element 22 intended to produce steam by increasing the temperature of the water introduced into a water reserve of the steam generator 11.
  • Said at least one heating element 22 of said steam generator It may be disposed inside or outside the water supply so as to generate the steam.
  • the steam generator 11 is supplied with water from a hydraulic circuit 17 and produces steam to diffuse into the cooking cavity 2.
  • the steam generator 11 is an integral part of the hydraulic circuit 17.
  • the heating means of the baking oven 1 also comprise a vault heating element 12 disposed under the upper wall 2a of the cooking cavity 2, a sole heating element 13 disposed under the bottom wall 2b of the cooking cavity 2, and a heating element 14 disposed inside the cooking cavity 2 along the bottom wall 2d of the cooking cavity 2.
  • the cooking oven 1 also comprises a fan 15 for circulating air and / or steam inside the cooking cavity 2.
  • This fan 15 makes it possible to mix the air and the steam inside the cavity 2 to homogenize the distribution of heat inside the cooking cavity 2.
  • the fan of this fan 15 is generally disposed in the center of the heating element 14 of circular shape.
  • the heating element 14 and the fan propeller 15 are generally arranged between the bottom wall 2d of the cooking cavity 2 and a heat diffuser.
  • the heating elements 12, 13, 14 are of the electric type.
  • heating element is in no way limiting and may be different, especially gas.
  • the baking oven 1 is adapted to implement cooking cycles only with steam by means of the steam generator 11 by diffusing the steam in the cooking cavity 2 or in a receptacle housed inside the cooking cavity 2.
  • This baking oven 1 may also be adapted to implement cooking cycles by combining the diffusion of heat by heating elements 12, 13, 14 and the diffusion of steam in the cooking cavity 2 by the steam generator 11.
  • baking cycles use a traditional heat diffusion by heating elements 12, 13, 14 combined with a heat diffusion by steam produced by the steam generator 11.
  • the diffusion of heat by steam produced by the Steam generator 11 can be implemented during conventional cooking modes commonly called for example natural convection, forced convection, grill, sole, rotating heat.
  • This baking oven 1 can also be adapted to implement conventional baking cycles using only the heating elements 12, 13, 14 by diffusing heat in the cooking cavity 2.
  • the baking oven 1 comprises control means constituted by at least one electronic card.
  • the electronic card comprising the control unit 10 is able to control the operation of the operating elements of the cooking oven 1, and in particular the steam generator 11 and the heating elements 12, 13, 14.
  • the cooking oven 1 comprises a water filling drawer 16 supplying water to the steam generator 11 by means of a hydraulic circuit 17.
  • the water filling drawer 16 is partially extractable outside the cooking oven 1.
  • the water filling drawer 16 is arranged in the zone of the control panel 7 of the baking oven 1.
  • the positioning of the water filler drawer in the area of the control panel of the baking oven is in no way limiting and may be different, for example below the door of the baking oven.
  • the supply of water from the water filling drawer 16 to the steam generator 11 can be achieved by means of a water tank 18.
  • the water tank 18 is disposed downstream of the filler drawer d water 16 and upstream of the steam generator 11 in the direction of water flow during the supply of water from the water filling drawer 16 to the steam generator 11.
  • the water tank 18 is disposed inside the body 3 of the baking oven 1, and in particular above the upper wall 2a of the cooking cavity 2 and behind the control panel 7 of the oven of cooking 1.
  • the positioning of the water tank in the cooking oven is not limiting and may be different.
  • the baking oven 1 also comprises a draining device 19 of the hydraulic circuit 17.
  • Figures 1 to 4 are schematic and that many organs necessary for the operation of the cooking oven have been omitted and do not need to be described in detail here.
  • the baking oven according to the invention comprises all the equipment and means necessary for the implementation of a conventional cooking cycle in such a baking oven.
  • the operating control method of the cooking oven 1 using steam makes it possible to display the emptying duration of a hydraulic circuit 17 of the cooking oven 1 as a function of the determination of the quantity of water consumed by a steam generator 11 and the predetermined amount of water for filling the hydraulic circuit 17 with water.
  • the emptying time determined by the control unit 10 can be displayed, in particular, by means of display means of the control panel 7 of the baking oven 1, such as, for example, segment or digital displays of the type LCD.
  • the water filling of the hydraulic circuit 17 is performed with the predetermined amount of water before the start of a cooking cycle using steam.
  • One or more other water fillings of the hydraulic circuit 17 with the predetermined amount of water can take place during the cooking cycle using steam used by the baking oven 1.
  • Each water filling of the hydraulic circuit 17 during the cooking cycle using steam carried out by the baking oven 1 is carried out with the predetermined amount of water, where the predetermined amount of water amount is identical.
  • the control unit 10 determines the emptying time of the hydraulic circuit by calculating the difference of a value of the quantity of water consumed by the steam generator 11 with a predetermined amount of water value previously recorded in the unit. order 10.
  • the predetermined amount of water value can either be stored in the operating parameters of the baking oven 1 when programming the control unit 10 by the manufacturer, or recorded in the operating parameters of the baking oven 1 when selecting an operating cycle using steam by the user via the selection means 8 of the control panel 7.
  • the value of the predetermined amount of water filled in the hydraulic circuit 17 may be of the order of one liter.
  • the value of the predetermined amount of water filled in the hydraulic circuit is in no way limiting and may be different.
  • the predetermined quantity of water filled in the hydraulic circuit 17 corresponds to the maximum amount of water contained in a water tank 18 of the hydraulic circuit 17.
  • the predetermined amount of water value is recorded previously in the control unit 10 during the production of the baking oven 1.
  • this predetermined water quantity value corresponds to a maximum amount of water contained. in a water tank 18 of the hydraulic circuit 17 so as to prevent the user from measuring a quantity of water filled in the hydraulic circuit 17.
  • the user thus fills the water reservoir 18 of the hydraulic circuit 17 to its maximum water level without having to measure a quantity of water and entering the value of this quantity of water through the selection means 8 of the control panel 7.
  • the quantity of water consumed by the steam generator 11 during the execution of a cycle of operation of the cooking oven 1 is reset to zero each time the hydraulic circuit 17 of the cooking furnace 1 is filled with water. predetermined amount of water.
  • control unit 10 determines the emptying time of the hydraulic circuit 17 by calculating the difference of a value of quantity of water consumed by the steam generator 11 with a predetermined amount of water value recorded previously in the control unit 10, wherein the predetermined amount of water value corresponds to the maximum amount of water contained in a water tank 18 of the hydraulic circuit 17, so as to take into account only the last water filling of the hydraulic circuit 17 by the user with the predetermined amount of water.
  • control unit 10 only takes into consideration the quantity of water consumed by the steam generator 11 following the last water filling of the hydraulic circuit 17 with a predetermined quantity of water, this quantity of water predetermined amount corresponding to a maximum amount of water contained in a water reservoir 18 of the hydraulic circuit 17, to determine the emptying time of the hydraulic circuit 17.
  • the determination of the emptying duration is also a function of a water flow rate of a drain pump 21 of the emptying device 19.
  • the amount of water contained in the hydraulic circuit 17 following the execution of an operating cycle of the cooking oven 1 is discharged by means of a drain pump 21 having a predetermined water flow.
  • the emptying time can thus be determined by the control unit 10 as a function of the quantity of water consumed by the steam generator 11, the predetermined amount of water for filling the hydraulic circuit 17 and the flow rate of water. water from the drain pump 21.
  • control method comprises a step of displaying a count of the emptying duration as a function of a duration of activation of the drain pump 21.
  • the emptying time determined by means of the control unit 10 is initially displayed, for example by the display means of the control panel 7, then a count of this emptying time is displayed, for example by the same display means of the control panel 7, depending on the duration of the activation of the drain pump 21.
  • the step of determining a quantity of water consumed by the steam generator 11 is implemented by means of a measurement by the control unit 10 of at least one operating parameter of an element 11, 20 forming part of the hydraulic circuit 17.
  • the operating control method of the steaming oven 1 using steam is able to determine the water consumption of the steam generator 11 by measuring at least one operating parameter of an element 11, 20 integral part of the hydraulic circuit 17 and without the use of a water level measuring device placed in the hydraulic circuit 17.
  • the element 11, 20 forming part of the hydraulic circuit 17 on which a measurement of at least one operating parameter is implemented by the control unit 10 may be for example a water distribution means 20 or the steam generator 11.
  • Such a control method makes it possible to determine the water consumption of the steam generator 11 forming an integral part of the hydraulic circuit 17 of the baking oven 1 and to determine a draining time of the hydraulic circuit 17 by taking only one measurement via the unit control unit 10 of the cooking oven of at least one operating parameter of an element 11, 20 forming part of the hydraulic circuit 17.
  • said at least one operating parameter of an element 11, 20 being an integral part of the hydraulic circuit 17 measured by the control unit 10 during the step of determining a quantity of water consumed by the generator of steam 11 is dependent on the duration of activation of said element 11, 20.
  • the determination of the quantity of water consumed by the steam generator 11 during the execution of an operating cycle of the cooking oven 1 is a function of a duty cycle of a heating means.
  • water supply 20 supplying water to the steam generator 11, where the water distribution means 20 is an integral part of the hydraulic circuit 17.
  • the duty ratio of the water supply means 20 supplying water the steam generator 11 is determined by the activation number of the water distribution means 20 and the duration of each activation of the water distribution means 20 during the execution of a cycle of operation of the oven 1 using steam, wherein the duty ratio of the water dispensing means 20 is a function of at least a predetermined moisture level in the cooking cavity 2 when performing a cycle of operation of the baking oven 1 using steam.
  • the duty cycle of the water supply means 20 supplying water to the steam generator 11 may be defined by an activation time of the water distribution means 20 for 2 seconds on a period of 5 seconds for a predetermined humidity of the order of 80% in the cooking cavity 2.
  • the duty ratio of the water distribution means 20 may also be a function of a predetermined set temperature inside the cooking cavity 2 when performing a cycle of operation of the baking oven 1 using steam, where the temperature inside the cooking cavity 2 is determined by means of a temperature probe.
  • the water distribution means 20 may be for example a solenoid valve, a pump, or a valve.
  • the determination of the quantity of water consumed by the steam generator 11 is obtained by accumulating all the measurements made by the control unit 10 of each activation time of the water distribution means 20 during a cycle of operation of the cooking oven 1 using steam.
  • the duration of each activation of the water distribution means 20 corresponds to a quantity of water consumed by the steam generator 11.
  • This value of quantity of water consumed by the steam generator 11 at each activation of the water distribution means 20 can be determined by means of a correspondence relation previously defined during experiments between the duration of activation of the means. water delivery 20 and the amount of water consumed.
  • the activation time of the water distribution means 20 may be of the order of 2 seconds and correspond to a quantity of water consumed which may be of the order of 26 grams.
  • the first activation time of said water delivery means 20 may be greater than the subsequent activation times thereof.
  • the first activation time of the water distribution means 20 may be of the order of 6 seconds and correspond to a quantity of water consumed which may be of the order of 78 grams.
  • the first activation time of the water distribution means 20 is greater than the following activation times thereof so as to fill the steam generator 11 with water to a predetermined water level, which can correspond to a maximum water level.
  • the following activation times of the water distribution means 20 are less than the first activation period thereof so as to prevent the steam generator 11 from being empty between two activation phases of the water distribution means. water supply 20.
  • the determination of a quantity of water consumed by the steam generator 11 during the execution of an operating cycle of the cooking oven 1 is a function of a duty cycle of at least a heating element 22 of the steam generator 11.
  • the duty cycle of said at least one heating element 22 of the steam generator 11 producing steam to be introduced into the cooking cavity 2 is determined by the activation number of said at least one heating element 22 of the steam generator 11 and the duration of each activation of said at least one heating element 22 of the steam generator 11 during the execution of an operating cycle of the cooking oven 1 using steam, wherein the duty cycle of said at least one heating element 22 of the steam generator 11 is a function of at least a predetermined humidity level in the cooking cavity 2 when performing a cycle of operation of the cooking oven 1 using steam.
  • the duty cycle of said at least one heating element 22 of the steam generator 11 may also be a function of a predetermined set temperature inside the cooking cavity 2 when executing a cycle of operation of the furnace. cooking 1, where the temperature inside the cooking cavity 2 is determined by means of a temperature probe.
  • the steam generator 11 comprises one or more heating elements that can be supplied with electrical energy or with gas.
  • heating element and the type of heating element of the steam generator are in no way limiting.
  • the determination of the quantity of water consumed by the steam generator 11 is obtained by the combination of all the measurements made by the control unit 10 of each duration of activation of said at least one heating element 22 of the generator. steam 11 during a cycle of operation of the baking oven 1.
  • the duration of each activation of said at least one heating element 22 of the steam generator 11 corresponds to a quantity of water consumed by the steam generator 11.
  • This value of quantity of water consumed by the steam generator 11 to each activation of said at least one heating element 22 of the steam generator 11 can be determined by means of a previously defined correspondence relation during experiments between the duration of activation of said at least one heating element 22 of the steam generator 11 and the amount of water consumed.
  • the predetermined humidity level in the cooking cavity 2 can be either selected by the user via the selection means 8 of the control panel 7, or stored in a memory of the control unit 10 during the manufacture of the baking oven 1 according to the type of operating cycle of the baking oven 1 using steam.
  • the predetermined set temperature in the cooking cavity 2 may be selected by the user via the selection means 8 of the control panel 7, or stored in a memory of the control unit 10 when the manufacture of the baking oven 1 according to the type of operating cycle of the baking oven 1 using steam.
  • control method comprises a step of increasing the duration of emptying with a fixed duration when the duration of emptying is below a minimum threshold value.
  • the emptying time of the hydraulic circuit 17 is greater than or equal to a fixed increase time when the emptying duration determined by the control unit 10 by means of a measurement of at least one operating parameter of a element 11, 20 forming part of the hydraulic circuit 17 is below a minimum threshold value so as to ensure complete emptying of the hydraulic circuit 17.
  • This fixed duration of increase of the duration of emptying of the hydraulic circuit 17 determined by the control unit 10 makes it possible to overcome, for example, disparities in the flow rate of water of a drain pump 21, of flow rate disparities. water of a water supply means 20 supplying the steam generator 11, or steam production output of the steam generator 11 lower than a predetermined yield.
  • the minimum threshold value of the emptying duration determined by the control unit 10 triggering the increase of the duration of emptying by a fixed duration can be of the order of 15 seconds.
  • the minimum threshold value of the emptying time determined by the control unit is in no way limiting and may be different.
  • the minimum threshold value of the emptying time determined by the control unit 10 triggering the increase of the duration of emptying by a fixed duration corresponds to the emptying time of the steam generator 11.
  • the fixed duration of increase of the emptying duration determined by the control unit 10 may be of the order of 15 seconds.
  • the fixed duration of increase of the duration of emptying determined by the control unit is in no way limiting and may be different.
  • the fixed duration of increase of the emptying duration determined by the control unit 10 corresponds to the emptying time of the steam generator 11.
  • the water filling step of the hydraulic circuit 17 is preceded by a step of moving the water filling spool 16 in the extended position.
  • the positioning of the water filling spool 16 in the extended position allows the introduction of water into the hydraulic circuit 17 of the baking oven 1 by a water supply opening 23 formed in the water filler drawer 16.
  • the hydraulic circuit 17 of the baking oven is filled with water with a predetermined quantity of water, as defined above, through the water supply opening 23 of the water filling drawer 16.
  • This water supply opening 23 may be formed in a first water filling portion 24 of the water filling drawer 16.
  • a step of executing an operating cycle of the cooking oven 1 using the steam is activated, in particular via the selection means 8 of the control panel. 7, during which the step of determining a quantity of water consumed by the steam generator 11 is implemented, as described above.
  • one or more water filling of the hydraulic circuit 17 of the baking oven 1 with the predetermined amount of water can be implemented during the execution of the operating cycle of the baking oven 1 using the steam.
  • the operating cycle of the cooking oven 1 using steam is interrupted by the control unit 10 and the water filling spool 16 is moved into the extended position to allow water filling of the hydraulic circuit 17 with the predetermined amount of water through the water supply opening 23 water filler drawer 16.
  • the water filling drawer 16 is returned to the retracted position so as to continue the operating cycle of the cooking oven 1 using steam under the control of the control unit 10.
  • the water filling drawer 16 is moved to the extended position.
  • a pre-programmed drain cycle of the hydraulic circuit 17 of the baking oven 1 is selected by the user via at least one selection means 25 of the control panel 7.
  • the emptying time of the hydraulic circuit 17 is displayed, in particular on a display means of the control panel 7, following the step of determining this emptying time by means of the control unit 10, as described above.
  • the hydraulic circuit 17 of the baking oven 1 is drained by the emptying device 19.
  • a second emptying portion 26 of the water filling drawer 16 is an integral part of the emptying device 19.
  • the second emptying portion 26 of the drawer water filling device 16 comprises a water drain opening 27 of the hydraulic circuit 17.
  • the water supply and water discharge openings 23 of the first and second parts 24, 26 of the water filling drawer 16 are accessible in the extended position of the water filling drawer 16 outside the baking oven 1.
  • the displacement of the water filling drawer 16 in the out position relative to an outer face 28 of the cooking oven 1 can be carried out manually by the user by pulling said water filling drawer 16 out of the oven of cooking 1, or automatically by means of the control unit 10 unlocking the water filler drawer and allowing the displacement of said water filler drawer 16 in the extended position by an actuator, such as for example a spring, or a engine, or a cylinder.
  • an actuator such as for example a spring, or a engine, or a cylinder.
  • the automatic movement of the water filling drawer 16 in the out position relative to an outer face 28 of the cooking oven 1 may thus allow to invite the user to fill the hydraulic circuit water with the predetermined amount of water at the start and / or during the execution of a cycle operating the cooking oven 1 using steam, and to drain the hydraulic circuit 17 as soon as the end of the operating cycle of the cooking oven 1 using steam or following a predetermined time elapsed after the end of the operating cycle of the oven of cooking 1 using steam.
  • the draining step of the hydraulic circuit 17 is carried out by continuously maintaining a drain selection means 25 of the control panel 7 of the cooking oven 1.
  • the user can check the fill level of a water collection vessel and stop the drain immediately by releasing the drain selection means 25 so as to avoid overflow of water.
  • the continuous maintenance of the drain selection means 25 of the control panel 7 thus makes it possible to carry out a drain under the control of the user and not automatic so as to avoid any incident due to the emptying of the hydraulic circuit 17 of the cooking oven 1 .
  • a drain pump 21 is put into operation so as to drain the hydraulic circuit 17 from the steam generator 11 to the water discharge opening 23 of the second emptying portion 22 of the water filler drawer 16.
  • the drain pump 21 can be operated through the continuous holding of the drain selection means 25 of the control panel 7. This drain pump 21 is stopped as soon as the drain selection means 25 is released.
  • the draining step is carried out by selecting a drain selection means 25 from the control panel 7 of the baking oven 1, which triggers an automatic draining of the hydraulic circuit 17 of the baking oven. 1.
  • control unit 10 When the hydraulic circuit 17 of the baking oven 1 is emptied by means of a drain pump 21, the control unit 10 counts the operating time of the drain pump 21 so as to cut off the drain automatically as soon as the emptying time previously determined by the control unit 10 has been reached.
  • a count of the emptying time displayed on a display means of the control panel 7 may be implemented depending on the duration of activation of the drain pump 21.
  • the emptying time of the hydraulic circuit 17 of the cooking oven 1 is determined by the control unit 10 following the determination of the quantity of water remaining in the hydraulic circuit 17 as a function of the predetermined quantity of water filled in the hydraulic circuit 17 and the amount of water consumed by the steam generator 11 during a cycle of operation of the cooking oven 1 using steam.
  • the hydraulic circuit 17 is drained completely so as to avoid any risk of overflow of water inside the baking oven 1 during a subsequent operating cycle using the steam is implemented by the latter.
  • the drain selection means 25 of the control panel 7 is a touch pad.
  • drain selection means of the control panel is not limiting and may be different, and in particular a button or a joystick.
  • the water is discharged from the hydraulic circuit 17 from a low point of the steam generator 11 by means of a drain pump 21 so as to circulate the water through a first water circulation pipe 29 of the emptying device 19.
  • the low point of the steam generator 11 corresponds to a drain orifice.
  • the water passes through the drain pump 21 and is discharged to the second drain part 26 of the water filling drawer 16 through a second water circulation pipe 30 of the emptying device 19.
  • the water enters the second drain portion 26 of the water fill drawer 16 through the water inlet port 31 and is circulated through the water circulation passage 32 of the second emptying portion 26 of the water filling drawer 16.
  • the water is discharged through the water drain opening 27 of the second drain portion 26 of the water filler drawer 16 so as to drain the hydraulic circuit 17 of the baking oven 1 to outside.
  • the water distribution means 20 is also put into operation so as to drain the water contained in at least the first water filling portion 24 of the water filler drawer. 16 to the steam generator 11.
  • the water contained in the hydraulic circuit 17 of the baking oven 1 upstream of the steam generator 11 is also drained by means of the emptying device 19 so as to prevent water from stagnating in the hydraulic circuit 17.
  • the flow of water contained upstream of the steam generator 11 towards the water discharge opening 27 of the second drain portion 26 of the water filling drawer 16 by the water distribution means 20 makes it possible to rinse the steam generator 11 and the emptying device 19 of the cooking oven 1.
  • the residues contained in the steam generator 11, such as for example limescale deposits generated during the evaporation of water in the steam generator 11, are then discharged to the water discharge opening 27 of the second emptying portion 26 of the water filling drawer 16 via the flow of water generated by the water distribution means 20 located upstream of the steam generator 11.
  • the water distribution means 20 may be for example a solenoid valve.
  • water dispensing means is not limiting and may be different, and in particular a pump, or a valve.
  • the water distribution means 20 is positioned downstream of the first water filling portion 24 of the water filling drawer 16 and upstream of the steam generator 11.
  • the water distribution means 20 can be positioned downstream of the water tank 18 and upstream of the steam generator 11.
  • the part of the hydraulic circuit 17 of the baking oven 1 arranged upstream of the steam generator 11 comprises the water filling drawer 16 and the water tank 18.
  • the first water filling part 24 of the filler drawer water 16 is fluidly connected to the water reservoir 18 by means of a water circulation pipe 33.
  • the water reservoir 18 is fluidly connected to the steam generator 11 through the distribution means of water 20 and a water circulation pipe 34.
  • the water distribution means 20 is controlled by the control unit 10 so as to drain all the part of the hydraulic circuit 17 situated upstream of the steam generator 11 comprising the first water filling part 24 of the filler drawer. water 16, and possibly the water tank 18.
  • the water contained in this part of the hydraulic circuit 17 located upstream of the steam generator 11 may for example be a surplus of water at the end of an operating cycle of the cooking oven 1 using the steam.
  • the operation of the distribution means water 20 during the emptying step is dependent on the flow of water from the water filler drawer 16.
  • the periods of opening and closing of the water distribution means 20 can be timed according to the flow of water from the water filler drawer 16, and possibly the water tank 18, which evolves at as the part of the hydraulic circuit 17 upstream of the steam generator 11 is emptied.
  • the emptying step is allowed following the detection of the water filling drawer 16 in the extended position.
  • the position detection of the water filling spool 16 makes it possible to control the emptying of the hydraulic circuit 17 of the baking oven 1 as a function of the retracted or outlet position of the water filler drawer 16 with respect to an external face 28 of the baking oven 1.
  • the position detection of the water filling spool 16 makes it possible to block the emptying of the hydraulic circuit 17 of the cooking oven 1 as long as the water filling spool 16 has not reached its extended position relative to the external face 28 of the baking oven 1.
  • water can not be discharged through the water drain opening 27 in the second drain portion 26 of the water fill drawer 16 if the water fill drawer 16 is not in the out position with respect to the external face 28 of the baking oven 1 so as to avoid any electrical risk by spilling water inside the baking oven 1 on electrical active parts.
  • the method of operating control of a cooking oven using steam makes it possible to display the emptying time of a hydraulic circuit of the cooking oven as a function of the determination of the quantity of water. consumed by a steam generator and the predetermined amount of water filling water of the hydraulic circuit.
  • the operating control method of a cooking oven using steam is able to determine the water consumption of the steam generator by measuring at least one operating parameter of an element that is an integral part of the steam generator. hydraulic circuit and without the use of a water level measuring device placed in the hydraulic circuit.
  • Such a control method makes it possible to determine the water consumption of the steam generator being an integral part of the hydraulic circuit of the baking oven and determining a drain time of the hydraulic circuit by making only one measurement via the control unit of the baking oven of at least one operating parameter of an element integral part of the hydraulic circuit.

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

Claims (12)

  1. Betriebssteuerungsverfahren eines Dampf verwendenden Backofens (1), wobei der besagte Backofen (1) umfasst:
    - Einen in einem Gehäuse (3) untergebrachten Garraum (2);
    - einen Hydraulikkreislauf (17);
    - einen Dampferzeuger (11), welcher über den besagten Hydraulikkreislauf (17) mit Wasser versorgt wird und in dem besagten Garraum (2) zu verbreitenden Dampf erzeugt, wobei der besagte Dampferzeuger (11) integraler Bestandteil des besagten Hydraulikkreislaufs (17) ist;
    - eine Betriebssteuerungseinheit (10) zumindest des besagten Dampferzeugers (11); und
    - eine Entleerungsvorrichtung (19) des besagten Hydraulikkreislaufs (17);
    dadurch gekennzeichnet, dass das besagte Verfahren zumindest die folgenden Schritte umfasst:
    - Auffüllen des besagten Hydraulikkreislaufs (17) des besagten Backofens (1) mit einer vorbestimmten Wassermenge;
    - Ermitteln einer von dem besagten Dampferzeuger (11) während der Ausführung eines Betriebszyklus des besagten Backofens (1) verbrauchten Wassermenge;
    - Ermitteln einer Entleerungsdauer anhand der besagten Ansteuereinheit (10) in Abhängigkeit von der besagten von dem besagten Dampferzeuger (11) verbrauchten Wassermenge und der besagten vorbestimmten Wasserauffüllmenge des besagten Hydraulikkreislaufs (17); und
    - Anzeigen der besagten Entleerungsdauer.
  2. Betriebssteuerungsverfahren eines Dampf verwendenden Backofens (1) nach Anspruch 1, dadurch gekennzeichnet, dass der besagte Schritt des Ermittelns einer von dem besagten Dampferzeuger (11) verbrauchten Wassermenge anhand einer Messung, durch die besagte Ansteuereinheit (10), mindestens eines Betriebsparameters eines Elementes (11, 20), welches integraler Bestandteil des besagten Hydraulikkreislaufs (17) ist, durchgeführt wird.
  3. Betriebssteuerungsverfahren eines Dampf verwendenden Backofens (1) nach Anspruch 2, dadurch gekennzeichnet, dass der besagte mindestens eine durch die besagte Ansteuereinheit (10) während des Schritts der Ermittlung einer von dem besagten Dampferzeuger (11) verbrauchten Wassermenge gemessene Betriebsparameter eines Elementes (11, 20), welches integraler Bestandteil des besagten Hydraulikkreislaufs (17) ist, von der Aktivierungsdauer des besagten Elementes (11, 20) abhängig ist.
  4. Betriebssteuerungsverfahren eines Dampf verwendenden Backofens (1) nach einem beliebigen der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass die Ermittlung der besagten Entleerungsdauer ebenfalls von dem Wasserdurchfluss einer Entleerungspumpe (21) der besagten Entleerungsvorrichtung (19) abhängig ist.
  5. Betriebssteuerungsverfahren eines Dampf verwendenden Backofens (1) nach Anspruch 4, dadurch gekennzeichnet, dass das besagte Verfahren einen Schritt des Anzeigens der besagten Entleerungsdauer in Abhängigkeit von der Aktivierungsdauer der besagten Entleerungspumpe (21) umfasst.
  6. Betriebssteuerungsverfahren eines Dampf verwendenden Backofens (1) nach einem beliebigen der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Ermitteln der besagten von dem besagten Dampferzeuger (11) während der Ausführung eines Betriebszyklus des besagten Backofens (1) verbrauchten Wassermenge von einem Tastverhältnis eines Wasserverteilungsmittels (20), welches den besagten Dampferzeuger (11) mit Wasser versorgt, abhängig ist, wobei das besagte Wasserverteilungsmittel (20) integraler Bestandteil des besagten Hydraulikkreislaufs (17) ist.
  7. Betriebssteuerungsverfahren eines Dampf verwendenden Backofens (1) nach Anspruch 6, dadurch gekennzeichnet, dass das besagte Tastverhältnis des besagten Wasserverteilungsmittel (20), welches den besagten Dampferzeuger (11) mit Wasser versorgt, anhand der Anzahl der Aktivierungen des besagten Wasserverteilungsmittels (20) und der Dauer einer jeden Aktivierung des besagten Wasserverteilungsmittels (20) während der Ausführung eines Betriebszyklus des besagten Dampf verwendenden Backofens (1) ermittelt wird, wobei das besagte Tastverhältnis des besagten Wasserverteilungsmittels (20) zumindest von einem vorbestimmten Feuchtigkeitsgrad in dem besagten Garraum (2) während der Ausführung eines Betriebszyklus des besagten Dampf verwendenden Backofens (1) abhängig ist.
  8. Betriebssteuerungsverfahren eines Dampf verwendenden Backofens (1) nach einem beliebigen der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass das Ermitteln einer von dem besagten Dampferzeuger (11) während der Ausführung eines Betriebszyklus des besagten Backofens (1) verbrauchten Wassermenge von einem Tastverhältnis zumindest eines Heizelements (22) des besagten Dampferzeugers (11) abhängig ist.
  9. Betriebssteuerungsverfahren eines Dampf verwendenden Backofens (1) nach einem beliebigen der Ansprüche 1 bis 8, dadurch gekennzeichnet, dass das besagte Verfahren einen Schritt des Erhöhens der besagten Entleerungsdauer um eine feste Zeitdauer, wenn die besagte Entleerungsdauer einen minimalen Grenzwert unterschreitet, umfasst.
  10. Betriebssteuerungsverfahren eines Dampf verwendenden Backofens (1) nach einem beliebigen der Ansprüche 1 bis 9, dadurch gekennzeichnet, dass die besagte vorbestimmte in den besagten Hydraulikkreislauf (17) eingefüllte Wassermenge der in einem Wasserbehälter (18) des besagten Hydraulikkreislaufs (17) enthaltenen maximalen Wassermenge entspricht.
  11. Betriebssteuerungsverfahren eines Dampf verwendenden Backofens (1) nach Anspruch 10, dadurch gekennzeichnet, dass die von dem besagten Dampferzeuger (11) während der Ausführung eines Betriebszyklus des besagten Backofens (1) verbrauchte Wassermenge bei jedem Wasserauffüllvorgang des besagten Hydraulikkreislaufs (17) des besagten Backofens (1) mit der besagten vorbestimmten Wassermenge auf Null zurückgesetzt wird.
  12. Backofen (1), welcher Dampf verwendet, umfassend:
    - einen in einem Gehäuse (3) untergebrachten Garraum (2);
    - einen Hydraulikkreislauf (17);
    - einen Dampferzeuger (11), welcher über den besagten Hydraulikkreislauf (17) mit Wasser versorgt wird und in dem besagten Garraum (2) zu verbreitenden Dampf erzeugt, wobei der besagte Dampferzeuger (11) integraler Bestandteil des besagten Hydraulikkreislaufs (17) ist;
    - eine Betriebssteuerungseinheit (10) zumindest des besagten Dampferzeugers (11); und
    - eine Entleerungsvorrichtung (19) des besagten Hydraulikkreislaufs (17);
    dadurch gekennzeichnet, dass er zumindest ein Auswahlmittel (25) mindestens eines vorprogrammierten Entleerungszyklus umfasst, welches für das Durchführen des Steuerungsverfahrens gemäß einem beliebigen der Ansprüche 1 bis 11 ausgelegt ist.
EP20110173766 2010-07-22 2011-07-13 Betriebssteuerungsverfahren eines Dampfbackofens, und entsprechender Backofen Active EP2409571B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1003107A FR2962892B1 (fr) 2010-07-22 2010-07-22 Procede de commande en fonctionnement d'un four de cuisson utilisant de la vapeur et four de cuisson associe.

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EP2409571A1 EP2409571A1 (de) 2012-01-25
EP2409571B1 true EP2409571B1 (de) 2013-09-11

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Publication number Priority date Publication date Assignee Title
EP3639706B1 (de) * 2018-10-19 2022-06-01 Electrolux Appliances Aktiebolag Verfahren zum betrieb eines dampfgargerätes sowie dampfgargerät
EP3835654A1 (de) * 2019-12-13 2021-06-16 E.G.O. Elektro-Gerätebau GmbH Verfahren zum betrieb eines dampferzeugers, dampferzeuger und kochgerät

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Publication number Priority date Publication date Assignee Title
KR101059818B1 (ko) * 2007-01-08 2011-08-26 삼성전자주식회사 스팀발생기와 이를 갖는 조리장치 및 그 제어방법
FR2934360A1 (fr) * 2008-07-22 2010-01-29 Csi Four universel a cuisson rapide

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FR2962892A1 (fr) 2012-01-27
ES2438719T3 (es) 2014-01-20
EP2409571A1 (de) 2012-01-25

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