EP2741013B1 - Appareil de cuisson avec un ventilateur et un dispositif de réglage - Google Patents

Appareil de cuisson avec un ventilateur et un dispositif de réglage Download PDF

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Publication number
EP2741013B1
EP2741013B1 EP13194486.0A EP13194486A EP2741013B1 EP 2741013 B1 EP2741013 B1 EP 2741013B1 EP 13194486 A EP13194486 A EP 13194486A EP 2741013 B1 EP2741013 B1 EP 2741013B1
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EP
European Patent Office
Prior art keywords
cooking appliance
zone
adjusting device
air
fan
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP13194486.0A
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German (de)
English (en)
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EP2741013A1 (fr
Inventor
Hans Lappat
Sebastian Matzinger
Helmut Uglorz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
BSH Hausgeraete GmbH
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BSH Hausgeraete GmbH
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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
    • F24C15/006—Arrangements for circulation of cooling air

Definitions

  • the present invention relates to a cooking appliance, in particular an oven.
  • a first mode of operation may be a hot air mode of the cooking appliance in which a food is baked in the oven oven.
  • a second operating mode may be, for example, a pyrolysis operation of the oven, in which the oven is burned out. This dirt is carbonized so that it either falls off by itself or can be easily removed. While temperatures of, for example, up to 230 ° in the oven occur in hot air operation, there are up to 600 ° in pyrolysis.
  • EP 1 566 594 A1 describes a method and a device for loading and / or venting a cooking oven comprising at least one oven muffle and a door for closing a feed opening of the oven muffle in a closed state and at least one cooking operation for cooking food in the oven muffle and a pyrolytic pyrolysis Cleaning the oven muff has.
  • Object of the present invention is therefore to provide an improved cooking appliance.
  • a cooking appliance in particular an oven, with at least one fan, a first and a second zone and at least one adjusting device is provided.
  • the adjusting device is set up in a first operating mode of the cooking appliance of the first zone a first air volume flow and the second zone a second air volume flow and in a second operating mode of the cooking appliance of the first zone to supply a third air volume flow and the second zone a fourth air volume flow.
  • the first and third air volume flow and the second and fourth air volume flow differ from each other.
  • the first and third airflows are different from each other, and the second and fourth airflows are the same.
  • the idea on which the present invention is based is to selectively supply the first and second zones, depending on the operating mode and the associated cooling task, with the appropriate air volume flow in order to ensure sufficient cooling there. While in the prior art, the distribution of cooling air is fixed and not changeable, that is no way to selectively cool the individual zones, in the present case, the admission of individual zones with cooling air is variable depending on the operating mode and in particular such that thermal limits in the area the first and second zones are not exceeded.
  • the first to fourth air volume flow may each be a cooling air volume flow.
  • the first and third air volume flow in each case a cooling air volume flow and the second and fourth air volume flow are each a Wrasen Kunststoffstrom from the cooking chamber of the cooking appliance.
  • “oven” should also include combination appliances, such as a microwave oven.
  • the operating modes may differ with respect to the respective temperature or with respect to a respective temperature range in the cooking chamber of the cooking appliance.
  • the first and second zones are selected from the group: a front of the cooking appliance, at least one furniture-side surface of the cooking appliance and / or a cooking chamber of the cooking appliance.
  • front is meant an operator-facing side of the cooking appliance during operation thereof. This must, for example, be strongly cooled in a hot air operation of the cooking appliance in order to prevent burns of persons who accidentally come into contact with the front of the cooking appliance, in particular children.
  • front in a pyrolysis operation, which takes place only rarely and deliberately, so that appropriate safety precautions can be taken, for example, children are not allowed access to the kitchen in which the cooking appliance is located, the front can be very hot and must accordingly be cooled only slightly , Due to the high temperatures in the cooking chamber in the pyrolysis operation, however, the electronic components must be cooled much more than is the case in the hot air operation.
  • electromechanical components also include electromechanical components.
  • the third zone could also be provided more than two zones, for example, three zones, which are selectively cooled.
  • the third zone then the already executed to the first and second zone applies.
  • the third zone could also be selected from the aforementioned group.
  • the front comprises a door.
  • the door can be equipped, for example, with a double duct system.
  • a space of the cooking appliance for receiving at least one electronic component, an electric motor, a circuit board and / or an electric actuator take up.
  • these components may for example have a thermal limit temperature of 85 °, which may not be exceeded regardless of the operating mode of the cooking appliance.
  • electrical also includes “electromechanical”.
  • the space may be formed, for example, as a switch room.
  • the switch room of a cooking appliance usually comprises a central control unit, in particular in the form of a board, of the cooking appliance.
  • the furniture side surface is formed as a side surface.
  • the furniture-side surface in particular the side surface, adjoins surrounding material, in particular wood. Since the thermal limit temperature of wood is typically 95 ° (at 25 ° room temperature), the temperature of the furniture side surface, in particular the side surface, must not exceed this limit temperature. At the same time, however, the temperature of the furniture-side surface, in particular the side surface, should not be significantly below this limit temperature, since the cooling is otherwise inefficient. For example, the temperature of the furniture side surface, in particular the side surface should be in a range of, for example, 85 to 90 ° (at 25 ° room temperature).
  • the adjusting device can be set up accordingly.
  • the first operating mode is a hot-air operation and / or the second operating mode is a pyrolysis operation.
  • the first zone is part of a first air duct connected to the cooling fan and the second zone is part of a second with the cooling fan connected air duct.
  • the at least one adjusting device is adapted to change a flow resistance and / or flow cross-section of the first and / or second air duct depending on the selected operating mode.
  • the fan sucks correspondingly more air from the second air duct, so that the cooling in the first zone deteriorates and improves in the second zone.
  • the first and second zones are each assigned a temperature limit value in the first and second operating modes.
  • the at least one adjusting device is preferably set up to adjust the flow resistance such that the temperature in the first and second zones does not exceed the temperature limit value.
  • the at least one adjusting device has an adjustable slide, an adjustable flap and / or an adjustable venturi jump.
  • the aforementioned means are each adapted to increase or decrease the flow resistance.
  • the adjusting device is adapted to interconnect the first and second air guide with each other in an air-conducting manner.
  • the air volume flows can be influenced and thus a targeted cooling of the first or second zone can be achieved.
  • the adjusting device has a flow resistance which increases asymptotically as the negative pressure applied to the adjusting device increases.
  • the air volume flow rate through the actuator does not increase from a certain operating vacuum, although the operating vacuum, for example by increasing the fan power continues to increase.
  • the adjusting device is thus self-limiting and advantageously requires no moving actuators. Examples of such a setting device are a suitably designed grid or other geometry. The self-locking effect may be based on the generation of suitable turbulences.
  • the adjusting device can be controlled by means of a vapor control for changing the flow resistance.
  • the cooking appliance is designed as a built-in appliance.
  • Fig. 1 shows a schematic diagram of a ventilation system in a cooking appliance 1 according to one embodiment.
  • the cooking appliance 1 is formed according to the embodiment as an oven, in particular as a built-in appliance in a kitchen.
  • the oven 1 comprises a fan 2 for generating an air volume flow 3. On the pressure side, the air volume flow 3 leads into the environment 4.
  • the suction side of the fan 2 with four air ducts 5, 6, 7, 8, for example, is air-conductively connected.
  • the air ducts 5, 6, 7, 8 are each formed by particular walls of the cooking appliance 1, for example u. a. in the form of pipes or even rectangular air duct cross-sections.
  • Component of a respective air guide 5, 6, 7, 8 is a first, second, third or fourth zone 11, 12, 13 and 14 (only for better illustration, the zones 11, 12, 13, 14 are left of the air ducts 5, 6, 7, 8).
  • the zone 11 may take the form of an in FIG. 2 be formed door shown.
  • the second zone 12 may take the form of in FIG. 2 shown side surfaces which adjoin a furniture 15, in which the oven 1 is installed, be formed.
  • the second zone 12 may also have an in FIG. 3 shown top 16 and a rear wall 17 of the oven 1 include.
  • the third zone 13 is for example as in FIG. 3 shown oven of the oven 1 is formed.
  • the fourth zone 14 is designed, for example, as a switch room, which accommodates a control electronics of the cooking appliance 1 formed on a printed circuit board.
  • a relatively strong cooling must be provided.
  • this is done by providing a device 21 in the form of a switchable air duct 23, which connects the air duct 5 with the air duct 6 in the hot air mode.
  • This results in a large flow of cooling air 22 through the door 11, which on the one hand via the air guide 5 itself sucked (see reference numeral 22 ') and on the other hand via the air guide 23 and the air duct 6 (see reference numeral 24) is sucked.
  • the air flow 25 for cooling the side surfaces 12, the top 16, the back 17 and the furniture 15 is small.
  • the temperature of the furniture 15 can then be up to 90 °.
  • the air guide 23 is switched in such a way that the air volume flow 24 toward the air guide 6 is stopped.
  • the pyrolysis operation is a second operating mode of the cooking appliance 1.
  • the air volume flow 25 becomes larger (this larger air volume flow is designated by 25 ').
  • the side surfaces 12, the top and back 16, 17 and the furniture 15 are more cooled, but this is also necessary because prevail in pyrolysis, for example, about 485 ° in the cooking chamber 13 and accordingly much more heat is released to the outside ,
  • the temperature of the furniture can be kept at 90 °.
  • the temperature of the door 11 is significantly higher, for example at 95 °, because - due to the lack of air volume flow 24-the air volume flow 22 is smaller (this smaller air volume flow is denoted by 22 ').
  • FIG. 2 illustrates a horizontal section through a cooking appliance 1 according to another embodiment.
  • FIG. 1 The principle described here is used here in a somewhat modified form: While the device 21 in FIG Fig. 1 is arranged to connect the air ducts 5, 6, which are assigned to different zones 11, 12, to each other, the oven 1 after FIG. 2 two devices 21 in the form of an adjustable slide 31 and an adjustable flap 32 on. Openings 33 and 34 are closed by means of the slide 31 or the flap 32 or (at least partially) opened to adjust the air volume flow 25 or 25 '. If the small air volume flow 25 is set, the result is automatically a larger air volume flow 22 through the door 11, which can be embodied with a double air duct system through which the air volume flow 22 flows.
  • the openings 33, 34 may be provided in the side surfaces 12.
  • An air gap between the oven 1 and the surrounding furniture, such as wood, is designated 35. For this, the air flow 25 is sucked.
  • FIG. 3 shows a vertical section through a cooking appliance 1 according to another embodiment.
  • a slider 31 for opening and closing the opening 33 is provided.
  • the slide 31 is coupled via a coupling rod 36 with an adjustable Venturi jump 37.
  • the Venturi jump 37 is overflowed by the pressure-side air volume flow 3 of the fan 2, so that, depending on how far the Venturi jump 37 is opened, a different suction pressure is applied to the air guide 7. Accordingly, a more or less large air flow 26 through the cooking chamber 13 is formed. If the air volume flow 26 is large, the air volume flow 25 through the opening 33 becomes correspondingly smaller, and vice versa.
  • a movement of the Venturi jump 37 can be coupled with a movement of the slide 31.
  • the slide 31 closes increasingly, the farther the Venturi jump 37 is opened, and vice versa.
  • FIG. 4A shows a vertical section through a cooking appliance 1 according to another embodiment.
  • a grid 41 is arranged.
  • the air resistance of the grid 41 increases asymptotically with increasing negative pressure.
  • An asymptote is designated 42. That is, the grille 41 is self-regulating, with the air resistance increasing so much that the grille 41 passes practically no air or only a small amount of air when the negative pressure approaches the asymptote 42.
  • negative pressure is meant here the pressure on the side of the grille 41, which is located upstream with respect to the fan 2.
  • the fan power 2 can be increased via the negative pressure associated with the asymptote 42, without the air volume flow 25 changing (ie remaining the same).
  • the air volume flow 22 through the door 11 increase, since now at the air guide 5, a greater negative pressure is applied.
  • FIG. 5 shows a vertical section through a baking oven 1 according to another embodiment.
  • an adjustable venturi 37 is provided, which closes or opens the air duct 5 as needed. If the venturi jump 37 is opened further, for example, the air volume flow 25 decreases correspondingly via the second zone 12 (not shown). If the venturi 37 further closed, the air flow increases accordingly.
  • the different air volume flows 22, 22 ', 25, 25', 26, 27 could also be achieved by using a plurality of fans 2, which are individually adjustable.

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

Claims (12)

  1. Appareil de cuisson (1), en particulier four, avec un ventilateur (2), au moins une première et une deuxième zone (11, 12, 13, 14) et au moins un dispositif de commande (21), lequel est aménagé, dans un premier mode de fonctionnement de l'appareil de cuisson (1), afin d'alimenter la première zone (11) en un premier débit volumique d'air (22) et la deuxième zone (12) en un deuxième débit volumique d'air (25) ainsi que dans un deuxième mode de fonctionnement de l'appareil de cuisson (1), afin d'alimenter la première zone (11) en un troisième débit volumique d'air (22') et la deuxième zone (12) en un quatrième débit volumique d'air (25'), dans lequel la première et la deuxième zone (11, 12, 13, 14) sont alimentables de manière variable en débits volumiques d'air (22, 22', 25, 25') pour le refroidissement selon le mode de fonctionnement, dans lequel pour une puissance de ventilateur du ventilateur (2) identique, dans le premier et deuxième mode de fonctionnement, le premier et troisième débit volumique d'air (22, 22') et le deuxième et quatrième débit volumique d'air (25, 25') se distinguent l'un de l'autre ou, en présence de puissances de ventilateur du ventilateur (2) différentes, dans le premier et deuxième mode de fonctionnement, le premier et troisième débit volumique d'air (22, 22') se distinguent l'un de l'autre et le deuxième et le quatrième débit volumique d'air (25, 25') sont identiques, dans lequel la première et la deuxième zone (11, 12, 13, 14) sont des éléments différents, sélectionnés parmi le groupe : une face avant de l'appareil de cuisson (1), au moins une surface de l'appareil de cuisson (1) côté meuble et/ou un espace de cuisson de l'appareil de cuisson (1).
  2. Appareil de cuisson selon la revendication 1, caractérisé en ce que la face avant englobe une porte (11).
  3. Appareil de cuisson selon l'une des revendications 1 à 2, caractérisé en ce que la surface côté meuble (12) est exécutée sous la forme d'une surface latérale de l'appareil de cuisson (1).
  4. Appareil de cuisson selon l'une des revendications 1 à 3, caractérisé en ce qu'un espace de cuisson (13) de l'appareil de cuisson (1) présente dans le deuxième mode de fonctionnement une température supérieure à celle du premier mode de fonctionnement.
  5. Appareil de cuisson selon la revendication 4, caractérisé en ce que le premier mode de fonctionnement est un mode à air chaud et/ou le deuxième mode de fonctionnement est un mode pyrolytique.
  6. Appareil de cuisson selon l'une des revendications 1 à 5, caractérisé en ce que la première zone (11) fait partie d'un premier conduit à air (5) relié au ventilateur (2) et la deuxième zone (12) fait partie d'un deuxième conduit à air (6) relié au ventilateur (2) et en ce que l'au moins un dispositif de commande (21) est aménagé afin de modifier une résistance à l'écoulement et/ou une section d'écoulement du premier et/ou du deuxième conduit à air (5, 6) en fonction du mode de fonctionnement sélectionné.
  7. Appareil de cuisson selon la revendication 6, caractérisé en ce qu'une valeur limite de température respective est affectée à la première et à la deuxième zone (11, 12) dans le premier et deuxième mode de fonctionnement et en ce que l'au moins un dispositif de commande (12) est aménagé afin de régler la résistance à l'écoulement et/ou la section d'écoulement de telle sorte que la température dans la première et la deuxième zone (11, 12) n'excède pas la valeur limite de température respective.
  8. Appareil de cuisson selon l'une des revendications 1 à 7, caractérisé en ce que l'au moins un dispositif de commande (21) présente un coulisseau mobile (31), un clapet mobile (32) ou une élévation à effet Venturi (37) réglable.
  9. Appareil de cuisson selon l'une des revendications 1 à 7, caractérisé en ce que le dispositif de commande (21, 23) est aménagé afin de relier le premier et le deuxième conduit à air (5, 6) l'un à l'autre.
  10. Appareil de cuisson selon l'une des revendications 1 à 7, caractérisé en ce que le dispositif de commande (21, 41) présente une résistance à l'écoulement augmentant de manière asymptotique à mesure que la dépression à laquelle le dispositif de commande (21, 41) est soumise croît.
  11. Appareil de cuisson selon l'une des revendications 6 à 9, caractérisé en ce que le dispositif de commande (21, 37) est actionnable au moyen d'une commande à vapeur pour la modification de la résistance à l'écoulement.
  12. Appareil de cuisson (1) selon l'une des revendications 1 à 11, caractérisé en ce que l'appareil de cuisson (1) est exécuté sous forme d'appareil à encastrer.
EP13194486.0A 2012-12-04 2013-11-26 Appareil de cuisson avec un ventilateur et un dispositif de réglage Active EP2741013B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102012222158.1A DE102012222158A1 (de) 2012-12-04 2012-12-04 Gargerät

Publications (2)

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EP2741013A1 EP2741013A1 (fr) 2014-06-11
EP2741013B1 true EP2741013B1 (fr) 2017-05-10

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DE (1) DE102012222158A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015225581A1 (de) * 2015-12-17 2017-06-22 Convotherm Elektrogeräte GmbH Verfahren zum Betreiben eines gewerblichen Gargeräts
WO2018044067A1 (fr) * 2016-09-01 2018-03-08 Samsung Electronics Co., Ltd. Four

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3519423A1 (de) * 1985-05-30 1986-12-04 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Gargeraet mit verschliessbarem garraum
DE3741975A1 (de) * 1987-12-11 1989-06-22 Buderus Kuechentechnik Vorrichtung zur steuerung eines mit dampf betriebenen gargeraetes und vorrichtung zum betreiben eines solchen geraetes
DE19524369A1 (de) * 1995-07-04 1997-01-09 Bosch Siemens Hausgeraete Backofen
DE10211522A1 (de) * 2002-03-15 2003-09-25 Bsh Bosch Siemens Hausgeraete Elektrisches Haushaltskochgerät, insbesondere Pyrolyse-Backofen
DE102004008463B3 (de) * 2004-02-20 2005-03-10 Electrolux Home Prod Corp Verfahren und eine Vorrichtung zum Be- und/oder Entlüften eines Garofens

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DE102012222158A1 (de) 2014-06-05
EP2741013A1 (fr) 2014-06-11

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