EP3018419B1 - Four au cuisson - Google Patents

Four au cuisson Download PDF

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Publication number
EP3018419B1
EP3018419B1 EP15192486.7A EP15192486A EP3018419B1 EP 3018419 B1 EP3018419 B1 EP 3018419B1 EP 15192486 A EP15192486 A EP 15192486A EP 3018419 B1 EP3018419 B1 EP 3018419B1
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EP
European Patent Office
Prior art keywords
cooking
control system
fan
oven
heating means
Prior art date
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EP15192486.7A
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German (de)
English (en)
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EP3018419A1 (fr
Inventor
Aldo Fumagalli
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Candy SpA
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Candy SpA
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/08—Arrangement or mounting of control or safety devices
    • F24C7/087—Arrangement or mounting of control or safety devices of electric circuits regulating heat

Definitions

  • the present invention relates to a cooking oven, in particular a domestic electrical oven.
  • Domestic cooking ovens usually comprise a housing with a cooking cavity which delimits inside a cooking space for accommodating the food to be cooked.
  • the cooking cavity has an access opening which can be closed by means of a door hinged to the housing.
  • the cooking cavity is provided, at its lower and upper walls, with heating elements typically formed by electrical resistors.
  • the electrical cooking ovens comprise an air circulation system in the cooking cavity.
  • an air circulation system comprises an impeller operated by an electrical motor in flow communication with the cooking cavity so as to be able to generate an air circulation in the cooking space.
  • the ovens of the prior art may comprise a fan placed in a cooling compartment arranged over the cooking cavity and which can be operated to suck ambient air, e.g. through an intake opening formed in a rear wall of the housing, and to direct it towards the thermally sensitive components and/or through a horizontal slot of the front wall of the oven in the anterior front zone (grip zone) of the oven door.
  • a fan placed in a cooling compartment arranged over the cooking cavity and which can be operated to suck ambient air, e.g. through an intake opening formed in a rear wall of the housing, and to direct it towards the thermally sensitive components and/or through a horizontal slot of the front wall of the oven in the anterior front zone (grip zone) of the oven door.
  • the cooling of the thermally sensitive components of the oven is activated when the oven is switched on and remains on for the entire operating time of the oven until it is switched off. This ensures fully safe operation of the oven and avoids undesired overheating at the cost of a permanent consumption of electrical energy.
  • the ventilating of the cooking space may be turned on or off by the user as a function of the cooking recipe. Once on, the ventilating of the cooking space remains permanently on until it is switched off manually regardless of the operation of the heating resistors of the oven. Thereby, the ventilating of the cooking space also implies a permanent consumption of electrical energy.
  • WO2014/044767A1 describes a method for operating a cooking oven with a synchronized pulsed heating and hot air ventilation, wherein the minimum ventilation power can be zero.
  • US 5801362 discloses a cooking oven forming the closest state-of-the-art for the invention.
  • control system automatically switches on the fan together with switching on the heating means and automatically switches the fan off together with switching off the heating means so that the fan is actuated intermittently in a synchronized manner with the actuation of the heating means.
  • each step of heating of the cooking cavity is automatically and permanently accompanied by the ventilation of the thermally sensitive region of the oven (e.g. cooking cavity and/or thermally sensitive components, door) thus effectively avoiding the risk of overheating. Furthermore, during all periods in which the heating of the cooking cavity is deactivated and there can be no further increase of the thermal energy accumulated therein, the ventilation of the thermally sensitive region to which the fan is associated is deactivated and the respective consumption of electrical energy is canceled out.
  • the thermally sensitive region of the oven e.g. cooking cavity and/or thermally sensitive components, door
  • a cooking oven 1 comprises a housing 2, in which a cooking cavity 3 is formed intended to accommodate the food to be cooked.
  • the cooking cavity 3 has an access opening 4 which can be closed by means of a door 5 hinged to the housing 2.
  • the oven 1 further comprises a heating system of the cooking cavity 3, e.g. one or more electrical resistors 6, 6' arranged outside and/or inside the cooking cavity 3.
  • a heating system of the cooking cavity 3 e.g. one or more electrical resistors 6, 6' arranged outside and/or inside the cooking cavity 3.
  • a ventilating system with one or more recirculation and/or ventilating and/or cooling impellers 7, 7', which can be operated by electrical motors 8, 8' mixes the air inside the cooking cavity 3 to suck and exhaust cooking fumes and/or for cooling thermally sensitive components of the oven 1, such as for example the door 5 and/or the electrical or electronic components 9.
  • the oven 1 further comprises a control system 10 connected and configured to control the heating means 6, 6' and the ventilating means 7, 7' and having a user interface 11 for selecting operating parameters and for indicating operating conditions of the oven 1.
  • control system 10 comprises a temperature detector 12 associated with the cooking cavity 3 and is configured to activate and deactivate the heating means 6, 6' according to a temperature detected by the temperature detector 12 and a desired temperature selected by means of the user interface 11.
  • the ventilating means comprise a first electrical fan 7', 8' positioned in a cooling compartment 13 formed, for example, over the cooking cavity 3 which can be operated to suck ambient air through an intake opening 14 in a wall of the housing 2, and to direct it as a first stream 14 (cooling stream) towards the heat sensitive components 9 placed inside the housing 2 and/or in a grip region 15 of the door 5 of the oven 1.
  • control system 10 automatically activates and deactivates the first electrical fans 7', 8' together with activating and deactivating the heating means 6, 6', regardless of the settings and/or cooking program selections made by the user.
  • Figure 8 shows a circuit diagram of the control system 10, in which the first fan 7', 8' and the heating means (electrical resistor 6) are connected to one another in parallel to form a single heating and ventilating unit 17 which is connected in series both to an on-off switch 18 of the oven 1 and to a switch 19 controlled by the temperature detector 12 (thermostat 19, 12) or controlled as a function of the temperature detected by the temperature detector 12.
  • the ventilating means may comprise a second electrical fan 7, 8 in flow communication with the cooking cavity 3 so as to be able to generate a second air stream 16 (heat distribution stream) in the cooking cavity 3.
  • control system 10 allows the selection of a cooking program with air circulation in the cooking cavity 3, and when the cooking program with air circulation in the cooking cavity 3 is selected, the control system 10 automatically activates and deactivates the second electrical fan 7, 8 together with activating and deactivating the heating means 6, 6'.
  • Figure 9 shows a circuit diagram of the control system 10, in which the first fan 7', 8', the second fan 7, 8 and the heating means (electrical resistor 6) are connected to one another in parallel to form a single heating and ventilating unit 17 which is connected in series to an on-off switch 18 of the oven 1 and to a switch 19 controlled by the temperature detector 12 (thermostat 19 or 12) or controlled as a function of the temperature detected by the temperature detector 12.
  • the control system 10 may also allow the selection of a cooking program without air circulation in the cooking cavity 3, and, when the cooking program without air circulation in the cooking cavity 3 is selected, the control system 10 keeps the second electrical fan 7, 8 automatically deactivated, regardless of the operation of the heating means 6, 6'.
  • FIG 10 shows a circuit diagram of the control circuit 10 in which the first fan 7', 8', the second fan 7, 8 and the heating means (electrical resistor 6) are connected to each other in parallel to form a single heating and ventilating unit 17 which is connected in series both to an on-off switch 18 of the oven 1 and to a switch 19 controlled by the temperature detector 12 (thermostat 19, 12) or controlled as a function of the temperature detected by the temperature detector 12 and in which a circuit branch 21 of the second fan 7, 8 in the heating and ventilating unit 17 comprises a third switch 20 which allows the connection and disconnection of the second fan 7, 8 in the heating and ventilating unit 17.
  • the heating means 6, 6', 6" can comprise one or more lower heating elements 6 arranged at a lower wall of the cooking cavity 3, one or more upper heating elements 6' arranged at an upper wall of the cooking cavity 3, as well as optionally one or more rear heating elements 6" arranged at the rear wall of the cooking cavity 3, and the control system 10 is configured to allow the selection of programs or cooking modes and to set the cooking mode as a function of the cooking programs selected by the user, said cooking modes comprising one or more of the following:
  • control system 10 operates the second electrical fan 7, 8 in:
  • control system 10 operates the second electrical fan 7, 8 in:
  • control system 10 operates the second electrical fan 7, 8 in:
  • control system 10 operates the second electrical fan 7, 8 in:
  • one criterion for choosing energy saving mode or standard mode is the necessary and/or predicted/estimated electrical power absorption to execute the cooking program or the cooking mode selected by the user.
  • control system 10 automatically activates and deactivates the first 7', 8' and second 7, 8 electrical fans together with activating and deactivating the heating means.
  • the oven according to the invention has many advantages. Each step of heating of the cooking cavity 3 is automatically and permanently accompanied by the ventilating of the thermally sensitive region of the oven 1, thus effectively avoiding the risk of overheating. Furthermore, during all periods in which the heating of the cooking cavity 3 is deactivated and there can be no further increase of the thermal energy accumulated therein, the ventilation of the thermally sensitive region is deactivated and the respective consumption of electrical energy is canceled out.

Landscapes

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

Claims (9)

  1. Four (1) de cuisson, comprenant une enveloppe (2), une cavité de cuisson (3) formée dans l'enveloppe (2) et pouvant être fermée par une porte (5), des moyens de chauffage (6, 6') placés en relation d'échange thermique avec la cavité de cuisson (3), des moyens de ventilation placés dans l'enveloppe (2) et ayant un premier ventilateur (7', 8') électrique qui aspire l'air ambiant par l'intermédiaire d'une ouverture d'admission (14) dans une paroi de l'enveloppe (2) et dirige ledit air ambiant comme un premier flux de refroidissement (14) vers des composants électriques ou électroniques thermosensibles (9) placés à l'intérieur de l'enveloppe (2) et/ou dans une région de préhension (15) de la porte (5),
    un système de commande (10) connecté aux moyens de chauffage (6, 6') et aux moyens de ventilation et ayant :
    - une interface utilisateur (11) permettant de sélectionner des paramètres de fonctionnement et permettant d'indiquer des conditions de fonctionnement du four (1), et
    - un détecteur de température (12) associé à la cavité de cuisson (3),
    dans lequel le système de commande est configuré pour activer et désactiver les moyens de chauffage (6, 6') selon une température détectée par le détecteur de température (12) et une température souhaitée sélectionnée au moyen de l'interface utilisateur (11), caractérisé en ce que le système de commande (10) est configuré pour activer et désactiver le premier ventilateur (7', 8') électrique conjointement avec l'activation et la désactivation respectives des moyens de chauffage (6, 6'), dans lequel l'activation commune et la désactivation commune du premier ventilateur (7', 8') électrique et des moyens de chauffage (6, 6') par le système de commande (10) est faite sans tenir compte de sélections de programme de cuisson faites par l'utilisateur.
  2. Four (1) de cuisson selon la revendication 1, dans lequel le premier ventilateur (7', 8') et le moyen de chauffage (6) sont connectés l'un à l'autre en parallèle pour former une seule unité de chauffage et de ventilation (17) qui est connectée en série à la fois à un interrupteur (19) commandé en fonction de la température détectée par le détecteur de température (12) et à un interrupteur marche-arrêt (18) du four (1).
  3. Four (1) de cuisson selon une des revendications précédentes, dans lequel :
    - les moyens de ventilation comprennent un second ventilateur (7, 8) électrique en communication d'écoulement avec la cavité de cuisson (3) de sorte à pouvoir générer un second flux d'air (16) dans la cavité de cuisson (3),
    - le système de commande (10) autorise la sélection d'un programme de cuisson avec circulation d'air dans la cavité de cuisson (3), et
    - lorsque le programme de cuisson avec circulation d'air dans la cavité de cuisson (3) est sélectionné, le système de commande (10) est configuré pour activer et désactiver le second ventilateur (7, 8) électrique automatiquement conjointement avec l'activation et la désactivation respectives des moyens de chauffage (6, 6').
  4. Four (1) de cuisson selon la revendication 3, dans lequel le premier ventilateur (7', 8'), le second ventilateur (7, 8) et le moyen de chauffage (6) sont connectés les uns aux autres en parallèle pour former une seule unité de chauffage et de ventilation (17) qui est connectée en série à la fois à un interrupteur (19) commandé en fonction de la température détectée par le détecteur de température (12) et à un interrupteur marche-arrêt (18) du four (1).
  5. Four (1) de cuisson selon la revendication 3 ou 4, dans lequel le système de commande (10) autorise la sélection d'un programme de cuisson sans circulation d'air dans la cavité de cuisson (3), dans lequel le système de commande (10) maintient le second ventilateur (7, 8) électrique automatiquement désactivé, sans tenir compte du fonctionnement des moyens de chauffage (6, 6').
  6. Four (1) de cuisson selon la revendication 5, dans lequel le premier ventilateur (7', 8'), le second ventilateur (7, 8) et le moyen de chauffage (6) sont connectés les uns aux autres en parallèle pour former une seule unité de chauffage et de ventilation (17) qui est connectée en série à la fois à un interrupteur (19) commandé en fonction de la température détectée par le détecteur de température (12) et à un interrupteur marche-arrêt (18) du four (1), et dans lequel une branche de circuit électrique (21) connectant le second ventilateur (7, 8) dans l'unité de chauffage et de ventilation (17) comprend un troisième interrupteur (20) autorisant la connexion et la déconnexion du second ventilateur (7, 8) dans l'unité de chauffage et de ventilation (17).
  7. Four (1) de cuisson selon la revendication 3, dans lequel le système de commande (10) est configuré pour établir des modes de cuisson différents en fonction des programmes de cuisson sélectionnés par l'utilisateur, dans lequel :
    - dans un mode d'économie d'énergie, le système de commande (10) active et désactive le second ventilateur (7, 8) électrique automatiquement conjointement avec l'activation et la désactivation respectives des moyens de chauffage (6, 6', 6"), et
    - dans un mode standard, le système de commande (10) active le second ventilateur (7, 8) électrique de manière continue sans interruptions.
  8. Four (1) de cuisson selon la revendication 7, dans lequel, dans ledit mode d'économie d'énergie, le système de commande (10) est configuré pour activer et désactiver le premier (7', 8') et le second ventilateur (7, 8) électrique automatiquement conjointement avec l'activation et la désactivation respectives des moyens de chauffage.
  9. Procédé de fonctionnement d'un four (1) de cuisson selon la revendication 3 ou 4, comprenant :
    - l'utilisation du système de commande (10) pour sélectionner un programme de cuisson sans circulation d'air dans la cavité de cuisson (3), et
    - lorsque le programme de cuisson sans circulation d'air dans la cavité de cuisson (3) est sélectionné, l'utilisation du système de commande (10) pour maintenir le second ventilateur (7, 8) électrique automatiquement désactivé, sans tenir compte du fonctionnement des moyens de chauffage (6, 6').
EP15192486.7A 2014-11-07 2015-11-02 Four au cuisson Active EP3018419B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI20141911 2014-11-07

Publications (2)

Publication Number Publication Date
EP3018419A1 EP3018419A1 (fr) 2016-05-11
EP3018419B1 true EP3018419B1 (fr) 2020-12-30

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ID=52232313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15192486.7A Active EP3018419B1 (fr) 2014-11-07 2015-11-02 Four au cuisson

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EP (1) EP3018419B1 (fr)
ES (1) ES2858475T3 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5267846A (en) * 1975-12-04 1977-06-04 Matsushita Electric Ind Co Ltd High frequency heater
EP0031156A1 (fr) * 1979-12-24 1981-07-01 Matsushita Electric Industrial Co., Ltd. Four de cuisine avec détecteur d'humidité en céramique
DE4016525A1 (de) * 1989-12-12 1991-06-13 Rinnai Kk Steuerschaltkreis fuer einen heizer
EP0855559A1 (fr) * 1997-01-27 1998-07-29 SANYO ELECTRIC Co., Ltd. Appareil de cuisson avec mode de démonstration

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5801362A (en) * 1994-01-14 1998-09-01 Hudson Standard Corporation Portable electric oven with fan and motor arrangement for improved heated air flow and motor cooling
IT1292485B1 (it) * 1997-07-04 1999-02-08 Whirlpool Co Sistema di ventilazione per apparecchi elettrici di cottura di alimenti comprendenti un piano di cottura e un forno
DE60325324D1 (de) * 2003-03-12 2009-01-29 Whirlpool Co Verfahren zum Betrieb eines Haushaltsbackofens und Backofen mit einem Kühlgebläse
KR20090030974A (ko) * 2007-09-21 2009-03-25 삼성전자주식회사 조리장치 및 그 스팀청소 제어방법
ITTO20090611A1 (it) * 2009-08-04 2011-02-05 Indesit Co Spa Metodo per controllare il funzionamento di un forno
ITTO20090612A1 (it) * 2009-08-04 2011-02-05 Indesit Co Spa Metodo per riscaldare una camera di cottura di un forno
DE102010028219A1 (de) * 2010-04-27 2011-10-27 BSH Bosch und Siemens Hausgeräte GmbH Gargerätevorrichtung
DE102012217055A1 (de) * 2012-09-21 2014-03-27 E.G.O. Elektro-Gerätebau GmbH Verfahren zum Betrieb eines Backofens und Backofen

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5267846A (en) * 1975-12-04 1977-06-04 Matsushita Electric Ind Co Ltd High frequency heater
EP0031156A1 (fr) * 1979-12-24 1981-07-01 Matsushita Electric Industrial Co., Ltd. Four de cuisine avec détecteur d'humidité en céramique
DE4016525A1 (de) * 1989-12-12 1991-06-13 Rinnai Kk Steuerschaltkreis fuer einen heizer
EP0855559A1 (fr) * 1997-01-27 1998-07-29 SANYO ELECTRIC Co., Ltd. Appareil de cuisson avec mode de démonstration

Also Published As

Publication number Publication date
EP3018419A1 (fr) 2016-05-11
ES2858475T3 (es) 2021-09-30

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