EP0732549A2 - Four pour le traitement thermique d'aliments et méthode de cuisson - Google Patents

Four pour le traitement thermique d'aliments et méthode de cuisson Download PDF

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Publication number
EP0732549A2
EP0732549A2 EP96103865A EP96103865A EP0732549A2 EP 0732549 A2 EP0732549 A2 EP 0732549A2 EP 96103865 A EP96103865 A EP 96103865A EP 96103865 A EP96103865 A EP 96103865A EP 0732549 A2 EP0732549 A2 EP 0732549A2
Authority
EP
European Patent Office
Prior art keywords
exhaust air
opening
oven according
oven
door
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.)
Withdrawn
Application number
EP96103865A
Other languages
German (de)
English (en)
Inventor
Martin Braun
Hans Lesch
Johann Mohr
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.)
Wiesheu GmbH
Original Assignee
WIESHEU WIWA GmbH
Wiesheu-Wiwa GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by WIESHEU WIWA GmbH, Wiesheu-Wiwa GmbH filed Critical WIESHEU WIWA GmbH
Publication of EP0732549A2 publication Critical patent/EP0732549A2/fr
Withdrawn legal-status Critical Current

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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
    • F24C15/20—Removing cooking fumes
    • F24C15/2007—Removing cooking fumes from oven cavities
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C15/00—Details
    • F24C15/20—Removing cooking fumes
    • F24C15/2007—Removing cooking fumes from oven cavities
    • F24C15/2014—Removing cooking fumes from oven cavities with means for oxidation of cooking fumes
    • 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
    • F24C15/325—Arrangements of ducts for hot gases, e.g. in or around baking ovens with forced circulation electrically-heated

Definitions

  • the invention relates to an oven for the heat treatment of food, with a housing within which a cooking space is provided, which can be closed by means of a door, with a heating device for heating the cooking space, with a blower, and with an exhaust air opening.
  • the invention further relates to a method for baking food, in which the food is subjected to heat in an oven.
  • a furnace of the type mentioned is known from DE-32 46 333 A1.
  • the known oven has a cooking chamber which can be closed by a door, the upper end of which consists of a strip of plastic which extends over the entire door width and which has a recessed grip and ventilation slots and a vapor discharge opening connected to the cooking chamber.
  • a vapors shaft is connected to the cooking space via an opening, which is led vertically from the vapors inlet opening up to the door strip.
  • an exhaust air fan can be provided in order to support the removal of the vapor by means of blown air escaping at the upper end of the door strip.
  • the invention is therefore based on the object to remedy this situation and to provide an oven and a method for baking, with which sufficient evacuation of the vapors is ensured even in the event of strong vapor formation within the oven.
  • the oven is not operated in the recirculation mode with vapor extraction, as is conventional, but instead in a "through-air mode", since air is sucked into the cooking space through the supply air opening and the vapors are extracted through the exhaust air opening.
  • This creates a constant flow of air through the cooking chamber, which immediately releases any vapors that are released.
  • even deep-frozen foods and deep-frozen baked goods with a high moisture content can be heat treated or baked without the disadvantageous influence of the vaping. This means, for example, that even deep-frozen baked goods with a very high moisture content can be baked crispy.
  • the object is further achieved by a method for baking foodstuffs, in which the foodstuffs are subjected to heat in an oven, the fluid inside the oven first being circulated (recirculation mode), and before the end of the baking time the fluid is sucked through the furnace is switched over (through-air operation) in order to effect a constant change of the fluid within the furnace.
  • energy-saving baking is first made possible in recirculation mode, and only at the end of the baking time is the vaping rapidly carried out by switching to air-through mode, in order to produce crispy baked goods in an energy-saving manner.
  • the supply air opening is connected to an intake duct which opens in the region of the upper end of the door.
  • This measure has the advantage that the blower is simultaneously used to extract vapors occurring in the door area.
  • the fan is an exhaust air fan which is arranged outside the cooking space and to which the exhaust air opening is connected.
  • the fan which is usually already in the oven anyway, is not used to extract the vapor, but instead a special exhaust air fan is provided, with which particularly effective extraction is made possible.
  • the suction side of the exhaust air fan is connected to an intake duct which opens in the region of the upper end of the door, and the pressure side of the exhaust air fan is connected to the exhaust air opening.
  • the exhaust air fan can also be acted on with mixed air, warm air or fresh air, so that it sucks directly out of the cooking chamber, but a certain proportion of cold air is additionally mixed in for cooling in order to avoid overheating.
  • the exhaust air fan can thus be operated at much lower temperatures and can be designed considerably more cost-effectively.
  • the intake duct comprises an intake funnel which opens into the area of the upper end of the door.
  • Rib-like elements can additionally be arranged within the intake duct in order to cool and condense vapors drawn in by the door via the intake duct.
  • the door has at least one inlet opening in the lower region and at least one outlet opening in the upper region in the vicinity of the mouth of the intake duct, which are connected via a connecting duct in the door.
  • the blower is arranged outside the cooking space in a separate blower space, which at least on the suction side of the blower a suction opening is connected to the cooking space and is connected to the blower on the pressure side of the blower via access openings to allow circulation of the fluid within the cooking space, and the pressure side of the blower is connected to the exhaust air opening.
  • the already existing fan is used with the aid of the known arrangement of a circulating fan in a forced-air oven in order to achieve effective evacuation of the vapors in connection with the supply air opening.
  • the advantages according to the invention can thus be achieved in a particularly cost-effective manner.
  • the supply air opening is at least partially closable.
  • a control device for opening and closing the supply air opening according to a specific program or as a function of a sensor signal.
  • the exhaust air opening can also be designed to be closable.
  • an overpressure valve can advantageously be integrated into the closing device, although a separate arrangement of a pressure relief valve is of course also possible.
  • control device allows time-controlled opening and closing according to a preselectable program for certain foods.
  • the supply air and extract air openings can be controlled separately or synchronously.
  • This measure has the advantage that program-controlled operation of the furnace is made possible in a particularly cost-effective manner.
  • the time control for baked goods causes the supply air opening to open at the end of the baking time.
  • a baking process that is typical of baked goods is thus made possible in order to save crisp baked goods such as rolls, pretzels and the like. To be able to produce.
  • a catalyst for cleaning the exhaust air is provided.
  • the catalytic converter is arranged outside the furnace and combined with a heating device.
  • the catalyst can be retrofitted to existing furnaces without the need to convert the furnace.
  • the heating device ensures a high efficiency of the catalyst.
  • an exhaust air filter is provided.
  • the exhaust air filter can of course also be used in addition to a catalytic converter, for example in order to collect fat components or the like.
  • a supply air filter can additionally or alternatively be provided.
  • a pressure sensor can be provided to indicate a pressure drop when the filter is used up, so that a change is carried out in good time.
  • a first embodiment of an oven according to the invention is generally designated by the number 10.
  • a cooking chamber 14 is arranged within a housing 12, the front of which can be closed by means of a door 16.
  • a floor drain 66 is provided, which is connected to a drain.
  • Heating elements 26 are provided on the top and on the bottom for heating the cooking chamber 14.
  • a blower chamber 30 behind the rear wall of the cooking chamber 14 is a blower chamber 30, within which a fan 32 driven by a motor 34 is provided, which draws in through axial suction openings 36 on the rear wall of the cooking chamber 14 and which also has lateral access openings 38 on the edges of the rear wall the cooking chamber 14 is connected.
  • Additional heating elements 28 in the form of heating coils run coaxially around the blower 32. With this arrangement, which is known per se, heating of the furnace 10 is made possible by means of top and bottom heat as well as by circulating air.
  • an exhaust air opening 44 is provided, which is connected to a filter 68, the outlet opening of which is connected to an exhaust pipe 56.
  • a supply air opening 42 is also provided shortly in front of the rear wall and is connected to an intake duct 13 via an actuating device 50.
  • the intake duct 13 comprises an intake funnel 46 (see FIG. 2), which opens out at the front end of the furnace above the door 16 via horizontally arranged air slots 48.
  • a supply air filter 69 can also be provided above the air slots 48, as is only indicated schematically in FIG. 1.
  • Both filters 68, 69 can be monitored by means of pressure sensors in order to indicate a pressure drop when the filter is used up, so that a filter change is carried out in good time.
  • the door 16 is sealed against the front of the cooking chamber 14 by a circumferential seal 24 and has air inlet openings 20 in the form of slots at the lower end below the seal 24, and in a corresponding manner at the upper end above the seal 24 air outlet openings 22 Inside the door 16, the inlet openings 20 are connected to the outlet openings 22 via a connecting channel 18.
  • the actuating device 50 comprises a flap 54 which can be opened and closed by means of an actuating motor 52 or can be pivoted into intermediate positions.
  • a corresponding closing device 51 or actuating device with a flap 55, which is actuated via a servomotor 53, can be provided within the exhaust air opening 44.
  • a control device 58 is provided, which preferably comprises a microprocessor control, from which the heating devices 26, 28 and the actuating devices 50 and 51 are controlled, as indicated by control lines 60, 61, 62, 64. It is understood that the control device 58 can also control the blower 32 and other control elements such as sensors and. Like. Can include. It is further understood that the control device 58 can be operated from the front of the furnace 10 via a corresponding input and control unit.
  • the control device 58 now has a series of preselectable programs for the heat treatment of different foods, via which a desired cooking or baking process can be set for different foods.
  • the temperature inside the cooking chamber 14 is preferably controlled in a suitable manner and the actuating device 50 is additionally actuated in a suitable manner in order to open completely or, if there is a large amount of vapors, or partially, if the volume of vapors is less to reach the supply air opening 42.
  • the supply air opening 42 is only opened in the last minutes before the end of the baking time, while the rest remains closed to enable energy-saving operation. If deep-frozen goods are used, the supply air opening is preferably opened after a corresponding warming-up time 42 acts to enable effective evacuation of the vapors generated during thawing. In addition, numerous program sequences for opening the supply air opening 42 over time are conceivable, depending on the desired heat treatment process and on the quantity and condition of the foodstuffs to be treated. It also goes without saying that the supply air opening 42 can also be opened and closed with the aid of a sensor, for which purpose a temperature sensor or a humidity sensor can be used, for example.
  • the door 16 is cooled when the supply air opening 42 is open, since part of the effect of the fan 32 is used to generate an upward air flow through the door 16.
  • an exhaust fan 80 is provided in the upper rear end of the housing 12, which is supplied via a divided air flow from the intake duct 13 .
  • the exhaust air fan 80 is connected on the suction side to the intake duct 13.
  • the exhaust air fan 80 includes an outlet port 84 on the pressure side, which opens into the filter 68.
  • a riser pipe 82 opens into the outlet connection 84, the lower end of which forms the exhaust air opening 44 at the upper end of the blower chamber 30.
  • a partition plate 88 is provided within the intake duct 13, through which the air flow within the intake duct 13 is divided into two air flows, namely a first one, which extends from the air slots 48 according to arrow 72 to the intake opening of the exhaust air fan 80, and in a second one, which runs from the air slots 48 according to the arrow 74 through the supply air opening 42 into the cooking chamber 14.
  • the supply air opening 42 can be closed by a suitable actuating device 50 by means of a flap 54 which is driven by an actuating motor 52.
  • the exhaust fan 80 is only exposed to significantly lower temperatures than the temperatures inside the cooking space (usually up to about 250 ° C.), so that a considerably more cost-effective design can be selected.
  • two catalytic converters 86 are additionally arranged within the blower chamber 30 and are designed as rectangular plates.
  • the catalysts 86 which are thus arranged in the hottest zone of the furnace 10, enable effective exhaust air purification, so that odor nuisance is excluded.
  • the filter 68 can be provided.
  • the furnace 90 is heated exclusively with the aid of the heating elements 28 running concentrically around the fan 32. It goes without saying that further heating elements can of course be provided, for example such as the heating elements 26 according to the embodiment according to FIG. 1.
  • the exhaust air fan 80 is also controlled by the control device 58, as indicated by a control line 65.
  • FIG. 5 A further embodiment of an oven according to the invention is shown in FIG. 5 and is designated overall by the number 100.
  • the catalytic converter and the exhaust fan are not integrated in the furnace, but are arranged outside at the rear of the furnace and are combined into a separate unit. It is therefore a version that can be easily retrofitted.
  • the intake duct 13 is connected at its rear end via a vertically extending pipe 102 to a connecting piece 120 of an exhaust air fan 118, which opens into a catalyst body 108 on the pressure side.
  • the catalyst body 108 has an electrical heater 110 and is accommodated together with this and with the exhaust air fan 118 by a common housing 106.
  • a temperature sensor 112 is also provided within the catalyst body 108 in order to control the heater 110 in such a way that the catalyst body 108 is operated in an optimal temperature range, on the one hand to ensure sufficient effectiveness of the catalyst and on the other hand to keep the energy consumption as low as possible.
  • the exhaust air fan 118, the temperature sensor 112 and the heater 110 are connected to the control device 58 via corresponding control lines 116, 112 and 110.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Baking, Grill, Roasting (AREA)
EP96103865A 1995-03-16 1996-03-12 Four pour le traitement thermique d'aliments et méthode de cuisson Withdrawn EP0732549A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19509569 1995-03-16
DE19509569A DE19509569A1 (de) 1995-03-16 1995-03-16 Ofen zur Wärmebehandlung von Lebensmitteln und Verfahren zum Backen

Publications (1)

Publication Number Publication Date
EP0732549A2 true EP0732549A2 (fr) 1996-09-18

Family

ID=7756861

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96103865A Withdrawn EP0732549A2 (fr) 1995-03-16 1996-03-12 Four pour le traitement thermique d'aliments et méthode de cuisson

Country Status (2)

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EP (1) EP0732549A2 (fr)
DE (1) DE19509569A1 (fr)

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2817018A1 (fr) * 2000-11-17 2002-05-24 Brandt Cooking Dispositif d'evacuation de vapeur d'eau destine a un four de cuisson a la vapeur
EP1319897A3 (fr) * 2001-12-13 2004-12-08 Electrolux Home Products Corporation N.V. Procédé de fonctionnement d'un four de cuisson et four de cuisson
CN1299057C (zh) * 2002-04-29 2007-02-07 乐金电子(天津)电器有限公司 微波炉腔体的吸排气结构
EP1975516A1 (fr) * 2007-03-29 2008-10-01 Electrolux Home Products Corporation N.V. Four de cuisson et son procédé de fonctionnement
EP2031310A2 (fr) * 2007-07-24 2009-03-04 DragonAire Cooking Technologies, Inc. Systèmes et procédés de chauffage d'aliments
EP1909037A3 (fr) * 2006-10-05 2010-12-22 Miele & Cie. KG Four de cuisson doté d'un moufle et d'un ventilateur à courant transversal
EP1790912A3 (fr) * 2005-11-23 2012-09-26 Miele & Cie. KG Appareil de cuisson avec mouffle de four
US20130308678A1 (en) * 2012-05-16 2013-11-21 General Electric Company Oven air sampling system
EP2669583A1 (fr) * 2012-05-29 2013-12-04 ELECTROLUX PROFESSIONAL S.p.A. Four de cuisson avec un dispositif de traitement de vapeur
WO2015002678A1 (fr) * 2013-06-27 2015-01-08 Middleby Marshall Holdings Llc D/B/A Évacuation d'humidité forcée pour cuisson rapide
CN107920688A (zh) * 2015-06-08 2018-04-17 阿尔托-沙姆有限公司 烹饪烤箱
US10694753B2 (en) 2013-05-23 2020-06-30 Duke Manufacturing Co. Food preparation apparatus and methods
CN111713961A (zh) * 2019-03-21 2020-09-29 Bsh家用电器有限公司 具有主动空气入口的多功能蒸汽烹饪器具
WO2020208256A1 (fr) * 2019-04-12 2020-10-15 Bruckbauer, Wilhelm Dispositif pour faire chauffer un aliment à cuire
EP3760931A1 (fr) * 2019-07-04 2021-01-06 Electrolux Appliances Aktiebolag Four de cuisson comportant une cavité de four et un canal de refroidissement
US10918112B2 (en) 2013-05-23 2021-02-16 Duke Manufacturing Co. Dough preparation apparatus and methods
IT202000016792A1 (it) * 2020-07-10 2022-01-10 Marco Borgiani Forno comprendente una funzione di sanificazione dell’aria

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102015205498A1 (de) * 2015-03-26 2016-09-29 BSH Hausgeräte GmbH Gargerät mit Abluftkatalysator
US11698194B2 (en) * 2019-09-16 2023-07-11 Nanoracks, Llc Space oven

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT238117B (de) * 1961-02-20 1965-01-25 Debag Deutsche Backofenbau Ges Backofen mit Schwadenerzeuger
DE2656565B2 (de) * 1976-12-14 1979-07-12 Bosch-Siemens Hausgeraete Gmbh, 7000 Stuttgart Backofen mit einem Wrasenabzugskanal
DE2845869A1 (de) * 1978-10-21 1980-04-30 Miele & Cie Luftfuehrungssystem fuer einen herd
DE3144493A1 (de) * 1981-11-09 1983-05-19 Bosch-Siemens Hausgeräte GmbH, 7000 Stuttgart Gargeraet, insbesondere backofen
DE3839657C2 (de) * 1988-11-24 1993-11-18 Miele & Cie Luftführungssystem für einen Backofen

Cited By (30)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1209420A1 (fr) * 2000-11-17 2002-05-29 Brandt Cooking Dispositif d'évacuation de vapeur d'eau destiné à un four de cuisson à la vapeur
FR2817018A1 (fr) * 2000-11-17 2002-05-24 Brandt Cooking Dispositif d'evacuation de vapeur d'eau destine a un four de cuisson a la vapeur
EP1319897A3 (fr) * 2001-12-13 2004-12-08 Electrolux Home Products Corporation N.V. Procédé de fonctionnement d'un four de cuisson et four de cuisson
CN1299057C (zh) * 2002-04-29 2007-02-07 乐金电子(天津)电器有限公司 微波炉腔体的吸排气结构
EP1790912A3 (fr) * 2005-11-23 2012-09-26 Miele & Cie. KG Appareil de cuisson avec mouffle de four
US8950389B2 (en) 2006-10-05 2015-02-10 Miele & Cie. Kg Oven with a chamber and a cross-flow blower
EP1909037A3 (fr) * 2006-10-05 2010-12-22 Miele & Cie. KG Four de cuisson doté d'un moufle et d'un ventilateur à courant transversal
EP1975516A1 (fr) * 2007-03-29 2008-10-01 Electrolux Home Products Corporation N.V. Four de cuisson et son procédé de fonctionnement
AU2008234122B2 (en) * 2007-03-29 2011-09-29 Electrolux Home Products Corporation N.V. Cooking oven and method for operating the same
WO2008119481A1 (fr) * 2007-03-29 2008-10-09 Electrolux Home Products Coporation N.V. Four de cuisson et procédé d'utilisation de celui-ci
EP2031310A3 (fr) * 2007-07-24 2011-08-31 DragonAire Cooking Technologies, Inc. Systèmes et procédés de chauffage d'aliments
EP2031310A2 (fr) * 2007-07-24 2009-03-04 DragonAire Cooking Technologies, Inc. Systèmes et procédés de chauffage d'aliments
US9182296B2 (en) * 2012-05-16 2015-11-10 General Electric Company Oven air sampling system
US20130308678A1 (en) * 2012-05-16 2013-11-21 General Electric Company Oven air sampling system
EP2669583A1 (fr) * 2012-05-29 2013-12-04 ELECTROLUX PROFESSIONAL S.p.A. Four de cuisson avec un dispositif de traitement de vapeur
US11779023B2 (en) 2013-05-23 2023-10-10 Duke Manufacturing Co. Dough preparation apparatus and methods
US10694753B2 (en) 2013-05-23 2020-06-30 Duke Manufacturing Co. Food preparation apparatus and methods
US11602149B2 (en) 2013-05-23 2023-03-14 Duke Manufacturing Co. Food preparation apparatus and methods
US10918112B2 (en) 2013-05-23 2021-02-16 Duke Manufacturing Co. Dough preparation apparatus and methods
US9936706B2 (en) 2013-06-27 2018-04-10 Middleby Marshall Holding Llc Forced moisture evacuation for rapid baking
AU2014284697B2 (en) * 2013-06-27 2017-07-13 Middleby Marshall Holding Llc Forced moisture evacuation for rapid baking
US9357787B2 (en) 2013-06-27 2016-06-07 Middleby Marshall Holdings Llc Forced moisture evacuation for rapid baking
WO2015002678A1 (fr) * 2013-06-27 2015-01-08 Middleby Marshall Holdings Llc D/B/A Évacuation d'humidité forcée pour cuisson rapide
CN107920688A (zh) * 2015-06-08 2018-04-17 阿尔托-沙姆有限公司 烹饪烤箱
CN111713961A (zh) * 2019-03-21 2020-09-29 Bsh家用电器有限公司 具有主动空气入口的多功能蒸汽烹饪器具
WO2020208256A1 (fr) * 2019-04-12 2020-10-15 Bruckbauer, Wilhelm Dispositif pour faire chauffer un aliment à cuire
EP3760931A1 (fr) * 2019-07-04 2021-01-06 Electrolux Appliances Aktiebolag Four de cuisson comportant une cavité de four et un canal de refroidissement
WO2021001559A1 (fr) * 2019-07-04 2021-01-07 Electrolux Appliances Aktiebolag Four de cuisson comprenant une cavité de four et un canal de refroidissement
IT202000016792A1 (it) * 2020-07-10 2022-01-10 Marco Borgiani Forno comprendente una funzione di sanificazione dell’aria
WO2022008997A1 (fr) * 2020-07-10 2022-01-13 Marco Borgiani Four à fonction d'assainissement d'air

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