EP0984225A2 - Appareil de cuisson avec unitè de contrôle et procédé pour faire fonctionner un appareil de cuisson pourvu d'un telle unitè - Google Patents

Appareil de cuisson avec unitè de contrôle et procédé pour faire fonctionner un appareil de cuisson pourvu d'un telle unitè Download PDF

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Publication number
EP0984225A2
EP0984225A2 EP99103388A EP99103388A EP0984225A2 EP 0984225 A2 EP0984225 A2 EP 0984225A2 EP 99103388 A EP99103388 A EP 99103388A EP 99103388 A EP99103388 A EP 99103388A EP 0984225 A2 EP0984225 A2 EP 0984225A2
Authority
EP
European Patent Office
Prior art keywords
cooking
temperature
food
heating
heating elements
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Withdrawn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
EP99103388A
Other languages
German (de)
English (en)
Other versions
EP0984225A3 (fr
Inventor
Josef Gerl
Klemens Dipl.-Ing. Roch
Manfred Dipl.-Ing. Plankl
Hans Lappat
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
Original Assignee
BSH Bosch und Siemens Hausgeraete 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 BSH Bosch und Siemens Hausgeraete GmbH filed Critical BSH Bosch und Siemens Hausgeraete GmbH
Publication of EP0984225A2 publication Critical patent/EP0984225A2/fr
Publication of EP0984225A3 publication Critical patent/EP0984225A3/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Withdrawn legal-status Critical Current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
    • 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 device with a cooking space, with at least two Heating elements for heating the cooking space or food, with an input unit for the direct or indirect specification of a cooking mode and a cooking space or Set food temperature, and with a control unit for regulating by means of Temperature of the cooking chamber or the actual temperature of the food being cooked to the specified temperature Input setpoint and a corresponding method for operating a cooking device for cooking a food with at least two heating elements.
  • Such a cooking device is known from German Auslegeschrift 26 46 034, wherein in an oven on the ceiling and on the bottom of the muffle in different Power levels operated electrical heating elements for the upper and Lower heat are arranged. Their operating mode and operating temperature are through on the Operating elements attached to the front of the furnace are adjustable.
  • the muffle is a pan-like Insertable food rack.
  • a separate switching element is provided by top and bottom heat its actuation when using a surface that reflects heat rays well having the food support the ratio of the performance ratio of Top heat can be reduced to bottom heat.
  • the switching device is the universal oven for tinplate or blackplate food carriers usable, depending on what the housewife prefers.
  • Also known from DE 39 09 129 A1 is an electrically heated oven, the one Has top heat heater and a independently controlled bottom heat heater. These are each an upper heat temperature measuring point and a lower heat temperature measuring point assigned. Their measured temperature values are called actual temperature values to the respective input of an upper heat control unit or a lower heat control unit given. It is a common top heat temperature setpoint device provided, the temperature setpoint is also given to the bottom heat control unit becomes. Deviations from a standard deviation between top heat temperature and The bottom heat temperature is set via a top heat-bottom heat difference setpoint generator entered.
  • DE 37 40 904 A1 describes a power control for heating elements, for example Lower heat and upper heat, known, each heating element used individually and can be set separately in its performance from 0 to 100% by means of handling.
  • the object of the present invention is to provide a cooking appliance according to the preamble of Claim 1 and a cooking method according to the preamble of claim 3 to further develop such that improved cooking results can be achieved.
  • this is achieved in such a cooking device in that the Control unit depending on the value of the specified target temperature and the according to the selected operating mode active heating elements a size ratio of the in the Sets the heating power fed in and regulates the actual temperature, and / or that the control unit as a function of the value of the measured actual temperature or an expiring cooking time and the heating elements active according to the selected operating mode in each case a ratio of the sizes of the heating powers fed into the heating elements sets and regulates the actual temperature.
  • the invention is accordingly Method characterized in that the ratio of the heating powers of the heating elements set depending on the value of the specified target temperature and accordingly the actual temperature is regulated and / or that the ratio of the heating outputs of the heating elements during cooking depending on the value of the measured actual temperature or the expiring cooking time is set and accordingly the actual temperature is regulated.
  • Extensive series of measurements have shown that that cooking results can be influenced positively, for example, when Top / bottom heat mode the power distribution between the fed top heat and the fed bottom heat selected depending on the set target temperature becomes.
  • Different radiators can, for example, lead to higher target temperatures Relative weakening of the bottom heat output in relation to the top heat output improve the cooking result.
  • An oven 1 according to FIG. 1 has a housing 3 in which a metallic muffle 5 is held, which can be closed at the front by an oven door 7.
  • the muffle 5 is cuboid and enamelled.
  • the limit operating temperature of the enamel is about 500 ° C.
  • the oven muffle 5 is essentially all sides for thermal insulation surrounded by a known oven insulation material 9.
  • the oven muffle 5 is a multi-curved tubular heating element on the top side as an upper heating element 11 arranged.
  • Below the bottom of the oven muffle 5 is a bottom heat radiator 13 in the form of a tubular heater known per se and covered on the outside by the oven insulation 9.
  • the bottom heat radiator 13 is thermal in connection with the bottom of the muffle 5.
  • the nominal heating power of the top heat radiator 11 is 1400 watts when baking and that of the lower heat radiator 13 also 1400 watts.
  • a platinum 500 measuring resistor arranged as a temperature sensor 15.
  • a control knob held in a control panel of the oven 1 21 include operating modes B (e.g.
  • the control knobs 21 are connected to a control unit by means of connecting lines 27 23 of the oven 1 connected (Fig. 1, 3).
  • This control unit 23 has in particular a microprocessor and corresponding memory modules.
  • For controlling the heating power of the oven 1 is the control unit 23 via connecting lines 27 connected to a switching unit 25.
  • Corresponding electrical switches are in this provided that the on and off of the radiators 11, 13 and optionally the Allow circulating air blower 19 and / or circulating air heater 20.
  • the control unit 23 outputs corresponding control signals S1 ... Sn.
  • the control unit 23 via display signals A with display elements of the oven 1 connected (Fig. 3). It is also possible to use special input elements in the control unit 23 stored cooking programs Px known per se.
  • the oven temperature is the temperature sensor 15 also via a connecting line 27 connected to the control unit 23.
  • the regulated heating system is oven matched in such a way that according to that set with the control knob 21 Target temperature, the control unit 23, the radiators 11 selected according to the operating mode, 13, 20 switches in such a way that despite indirect temperature measurement by the temperature sensor 15 in the area of the ceiling of the oven muffle 5 the preset and desired
  • the oven temperature is essentially regulated in the center of gravity of the muffle 5.
  • An in the cooking space for example, baked goods arranged on a baking tray baked accordingly, for example, with the lower and upper heat 11, 13
  • the temperature sensor 15 senses the cooking space temperature and switches off the two radiators 11, 13 via the control unit 23 when a certain temperature is reached, which corresponds to a center of gravity oven temperature of approximately 100 ° C.
  • the two radiators 11, 13 then remain switched off for a switch-off time t A , in order then to be switched on again for a switch-on time t E.
  • the oven temperature is kept constant at about 100 ° C. using the temperature sensor 15 (actual temperature).
  • a heating power P OH1 is 1400 watts, while in the steady state according to FIG. 2 it is approximately halved by clocking according to P OH2 , ie is significantly reduced.
  • the same applies to the heating power of the lower heat radiator 13 with the nominal heating power P UH1 1400 watts in the heating process and the reduced heating power in the steady state P UH2 . (Fig. 2).
  • the power ratio v is the heating power of the top heat radiator Heating output of the lower heat radiator via that which can be specified by an operator or adjustable target temperature Ts as an example.
  • the heating outputs of the Top heat and bottom heat are, for example, below a set target temperature Ts of about 100 ° C the same size.
  • the temperature is basically controlled here as described in Fig. 2.
  • the target temperature Ts is the heating power of the top heat in relation to the heating power of the Bottom heat always chosen larger.
  • the heating output can of course also be used of the bottom heat increase with increasing target temperature Ts.
  • a set Target temperature Ts of about 200 ° C the heating power of the top heat is about twice as big as the bottom heat.
  • the geometry of the cooking space and the controller used in the control unit 4a can also be nonlinear, discontinuous or falling be realized.
  • the power ratio of the heating power of the top heat radiator is an example in FIG. 4b 11 to the heating power of the ring heater 20 at a constant heating power of Bottom heat radiator 13 outlined in recirculation mode. While here at a set temperature Ts of 100 ° C, the heating powers of the top heat radiator 11 and Ring heater 20 are approximately the same size, the heating power of the ring heater 20 is a target temperature of about 200 ° C about twice as high as that of the top heat radiator 11.
  • the dependency of the power ratio is also an example Heating power of the upper heat radiator 11 for the heating power of the lower heat radiator 13 plotted against the actual temperature ⁇ measured by the temperature sensor 15 in the muffle 5. While at lower actual temperatures ⁇ of up to 160 ° C the ratio v is only 0.7, the ratio v is reduced at higher temperatures from approximately 180 ° C. thus the heating power of the lower heat radiator 13 relative to the heating power of the upper heat radiator 11 reinforced.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Electric Stoves And Ranges (AREA)
  • Electric Ovens (AREA)
  • Baking, Grill, Roasting (AREA)
  • Commercial Cooking Devices (AREA)
EP99103388A 1998-08-27 1999-02-22 Appareil de cuisson avec unitè de contrôle et procédé pour faire fonctionner un appareil de cuisson pourvu d'un telle unitè Withdrawn EP0984225A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19839069 1998-08-27
DE1998139069 DE19839069C5 (de) 1998-08-27 1998-08-27 Backofen mit Unterhitzeheizkörper

Publications (2)

Publication Number Publication Date
EP0984225A2 true EP0984225A2 (fr) 2000-03-08
EP0984225A3 EP0984225A3 (fr) 2002-04-17

Family

ID=7878956

Family Applications (2)

Application Number Title Priority Date Filing Date
EP99103388A Withdrawn EP0984225A3 (fr) 1998-08-27 1999-02-22 Appareil de cuisson avec unitè de contrôle et procédé pour faire fonctionner un appareil de cuisson pourvu d'un telle unitè
EP99115777A Withdrawn EP0981961A3 (fr) 1998-08-27 1999-08-10 Four de cuisson avec résistance chauffante de sole

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP99115777A Withdrawn EP0981961A3 (fr) 1998-08-27 1999-08-10 Four de cuisson avec résistance chauffante de sole

Country Status (2)

Country Link
EP (2) EP0984225A3 (fr)
DE (1) DE19839069C5 (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10313914A1 (de) 2003-03-27 2004-10-07 BSH Bosch und Siemens Hausgeräte GmbH Verfahren zum Betreiben eines Backofens
DE102004055946A1 (de) * 2004-11-19 2006-05-24 BSH Bosch und Siemens Hausgeräte GmbH Gargerät mit einem Umluftheizkörper
DE102006013806A1 (de) * 2006-03-24 2007-09-27 Werner & Pfleiderer Lebensmitteltechnik Gmbh Verfahren zum Betrieb eines Backofens mit einem umluftbeheizten Backraum, einer Umluftheizung und einem Umluftgebläse
PL2110605T3 (pl) 2008-04-15 2015-10-30 Whirlpool Co Sposób gotowania
DE102008040936A1 (de) * 2008-08-01 2010-02-04 BSH Bosch und Siemens Hausgeräte GmbH Backofen
DE102014223267A1 (de) * 2014-11-14 2016-05-19 BSH Hausgeräte GmbH Haushalts-Wärmegerät mit Temperaturregler und Digitalanzeige
CN115711857B (zh) * 2023-01-06 2023-04-28 坛墨质检科技股份有限公司 一种铅离子标准溶液的残留检测实验装置及其检测方法

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2757059A1 (de) * 1977-12-21 1979-06-28 Bosch Siemens Hausgeraete Backofen
GB2106672A (en) * 1981-09-28 1983-04-13 Etna Bv De Household oven
DE3740904A1 (de) * 1987-12-03 1989-06-15 Licentia Gmbh Leistungssteuerung fuer heizelemente, insbesondere fuer umschaltbare haushalt- elektro- backoefen
DE3909129A1 (de) * 1989-03-20 1990-09-27 Werner & Pfleiderer Elektrisch beheizter backofen
DE4029181A1 (de) * 1990-09-14 1992-03-19 Miele & Cie Beheizung von backoefen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2661587A1 (fr) * 1990-04-27 1991-10-31 Europ Equip Menager Four de cuisson a resistances electriques de sole et/ou de voute.
DE4319613C1 (de) * 1993-06-14 1994-06-30 Bauknecht Hausgeraete Verfahren zum Betreiben eines Elektrobackofens
DE4323919A1 (de) * 1993-07-16 1995-01-19 Licentia Gmbh Verfahren zur Kalibrierung der Schwerpunktstemperatur in der Ofenmuffel eines elektrischen Back- und Bratofens
US5695668A (en) * 1995-09-08 1997-12-09 Boddy; Victor R. Oven with selectively energized heating elements

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2757059A1 (de) * 1977-12-21 1979-06-28 Bosch Siemens Hausgeraete Backofen
GB2106672A (en) * 1981-09-28 1983-04-13 Etna Bv De Household oven
DE3740904A1 (de) * 1987-12-03 1989-06-15 Licentia Gmbh Leistungssteuerung fuer heizelemente, insbesondere fuer umschaltbare haushalt- elektro- backoefen
DE3909129A1 (de) * 1989-03-20 1990-09-27 Werner & Pfleiderer Elektrisch beheizter backofen
DE4029181A1 (de) * 1990-09-14 1992-03-19 Miele & Cie Beheizung von backoefen

Also Published As

Publication number Publication date
DE19839069A1 (de) 2000-03-02
EP0984225A3 (fr) 2002-04-17
DE19839069B4 (de) 2007-08-02
EP0981961A2 (fr) 2000-03-01
DE19839069C5 (de) 2010-04-29
EP0981961A3 (fr) 2002-04-24

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