EP1837599B1 - Verfahren zur automatischen Beendigung eines Pyrolysereinigungsvorgangs bei einem Backofen - Google Patents

Verfahren zur automatischen Beendigung eines Pyrolysereinigungsvorgangs bei einem Backofen Download PDF

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Publication number
EP1837599B1
EP1837599B1 EP07004628.9A EP07004628A EP1837599B1 EP 1837599 B1 EP1837599 B1 EP 1837599B1 EP 07004628 A EP07004628 A EP 07004628A EP 1837599 B1 EP1837599 B1 EP 1837599B1
Authority
EP
European Patent Office
Prior art keywords
oxygen concentration
pyrolysis
temperature
cooking chamber
threshold value
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.)
Not-in-force
Application number
EP07004628.9A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1837599A2 (de
EP1837599A3 (de
Inventor
Thomas Dr. Krümpelmann
Ulrich Dr. Sillmen
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.)
Miele und Cie KG
Original Assignee
Miele und Cie KG
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Filing date
Publication date
Application filed by Miele und Cie KG filed Critical Miele und Cie KG
Priority to PL07004628T priority Critical patent/PL1837599T3/pl
Publication of EP1837599A2 publication Critical patent/EP1837599A2/de
Publication of EP1837599A3 publication Critical patent/EP1837599A3/de
Application granted granted Critical
Publication of EP1837599B1 publication Critical patent/EP1837599B1/de
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • F24C14/00—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning
    • F24C14/02—Stoves or ranges having self-cleaning provisions, e.g. continuous catalytic cleaning or electrostatic cleaning pyrolytic type
    • 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

Definitions

  • the invention relates to a method for automatically ending a pyrolysis cleaning process in an oven.
  • the US 4,954,694 also shows a method for automatic completion of a Pyrolysecurisvorgangs in an oven, wherein after switching on the heat source, the oxygen concentration is measured in a Ab povertyweg and from the course of the measured values, the duration of the pyrolysis process is determined.
  • a fixed or dependent on the pyrolysis time interval is additionally heated after completion of the actual pyrolysis process.
  • the invention thus has the problem of providing a method for automatic completion of a Pyrolysealismsvorgangs in an oven, in which the quality of Pyrolysealism while reducing the energy consumption during pyrolysis is improved.
  • the advantages achievable with the invention are, in particular, that the quality of the pyrolysis cleaning is improved while reducing the energy consumption during pyrolysis.
  • the limit value GW for the oxygen concentration can be selected within wide suitable limits.
  • the limit value GW for the oxygen concentration is in a range of about 20.5 mol% to 21.0 mol%.
  • the pyrolysis cleaning process comprises three phases, namely a heating phase until reaching a predetermined or automatically determined during the heating pyrolysis temperature T P of the cooking chamber, a holding phase whose duration is dependent on the measured oxygen concentration and during the pyrolysis T P is kept substantially constant by means of a temperature control, and a cooling phase to achieve a predetermined final temperature of the cooking chamber T E , with T E ⁇ T P , said under claim 1 process steps a) to d) performed only during the holding phase I. become. This makes it possible to restrict the monitoring of the oxygen concentration to the holding phase, so that the energy consumption is further reduced.
  • Fig. 1 an oven is shown in which the inventive method is used.
  • the oven has a control panel 2 with a display 4 and 6 controls.
  • the cooking chamber 8 can be closed by a door 10, wherein the door 10 has a see-through disk 12.
  • Fig. 2 shows the oven in a sectional view from the side.
  • the oven has an electrical control 14 behind the control panel 2.
  • the resulting in the cooking chamber 8 during pyrolysis flue gases 17, so-called fumes, can escape via an exhaust path 16 in the free environment.
  • the path of the flue gases 17 is symbolized by arrows 18.
  • an oxidation catalyst 22 is arranged, on which the flue gases 17 discharged through the exhaust air path 17 are converted in a manner known to those skilled in the art.
  • an oxygen sensor 24 for detecting the oxygen concentration is arranged in the exhaust path 16.
  • the aforementioned components are connected in a manner known to those skilled in the art to the electrical controller 14 in a signal-transmitting manner.
  • the oxygen sensor 24 may also be arranged at another suitable location in the oven.
  • the oven has heavy contaminants 26 in the embodiment. Please refer Fig. 2 , The user starts the pyrolysis cleaning process by means of the controls 6. He is guided and informed about the display 4 in a manner known to those skilled.
  • the cooking chamber temperature a is at the beginning of the pyrolysis cleaning process, time 0 min., Room temperature, ie about 20 ° C.
  • the oxygen concentration b corresponds to the oxygen concentration b in the atmosphere, ie about 21 mol% or 0 mol% deviation.
  • the cooking chamber 8 is now heated by means of the heating source 20 with a previously set and stored in a memory 141 of the electric controller 14 speed, namely about 10 ° C per 1 min., Heated.
  • the heating takes place by means disposed in the cooking chamber 8 and with the electrical control 14 signal transmitting connected temperature sensor 30 and a known temperature control by the electric controller 14, which turns on or off the heat source 20 according to the above-mentioned heating curve.
  • the heating phase described above is followed by a holding phase during which a predetermined pyrolysis temperature T P is kept essentially constant by means of the temperature sensor 30 and the temperature control already explained in a manner known to the person skilled in the art.
  • the pyrolysis temperature T P during the holding phase I is fixed here.
  • the pyrolysis temperature T P here is 460 ° C, see Fig. 3 ,
  • the duration of the holding phase 1 depends on the measured oxygen concentration b.
  • the limit value GW for the oxygen concentration b is set to 20.5 mol%.
  • the oxygen concentration b has dropped to values below the limit value GW during the pyrolysis cleaning process. As long as the oxygen concentration b remains below the limit value GW, the holding phase I continues and the pyrolysis temperature T P is further regulated to 460 ° C.
  • the contaminants 26 are implemented and thus less. As a result, the amount of flue gas 17 also decreases and the oxygen concentration b at the oxygen sensor 24 increases again.
  • Fig. 3 About 160 min.
  • the oxygen concentration b first exceeds the limit value GW for the first time, ie 20.5 mol%.
  • the cooking chamber temperature a is controlled during the entire holding phase I to the pyrolysis temperature T P from here 460 ° C by means of temperature control, it is usual during pyrolysis that the cooking space a due to the continuous reaction of the flue gases 17 at the Oxidation catalyst 22 fluctuates. Therefore, it is necessary that the aforementioned minimum value for the oven temperature a during the time interval l Zsuatz_1 is chosen to be correspondingly lower than the pyrolysis temperature T P , here 445 ° C.
  • the heat source 20 would be here after expiration of the time interval l foi_2, ie after 60 min. from the time the limit value GW for the oxygen concentration b is exceeded for the first time, it is switched off automatically.
  • the cooking chamber temperature a in the present embodiment during a cooling phase to a final temperature T E is reduced from 70 ° C here. On the one hand, this is achieved by the above-described switching off the heating source 20. On the other hand, to speed up the cooling, the flushing of the cooking chamber 8 with fresh air can be increased by means of a blower not shown in the figures. If the cooking chamber temperature a has dropped to the final temperature T E , the door 10, which is automatically locked during the start of the pyrolysis cleaning process, is unlocked again, so that it can be opened by the user without danger.
  • the cooling phase is in Fig. 3 not fully illustrated.
  • inventive method is not limited to the illustrated embodiment.
  • the time intervals l foi_1 , l foiu_2 and the pyrolysis temperature T P and the final temperature T E can be selected within wide suitable limits.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electric Ovens (AREA)
  • Processing Of Solid Wastes (AREA)
  • Incineration Of Waste (AREA)
  • Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
  • Cleaning In General (AREA)
EP07004628.9A 2006-03-20 2007-03-07 Verfahren zur automatischen Beendigung eines Pyrolysereinigungsvorgangs bei einem Backofen Not-in-force EP1837599B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07004628T PL1837599T3 (pl) 2006-03-20 2007-03-07 Sposób automatycznego kończenia procesu czyszczenia pirolitycznego w piekarniku

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102006013094A DE102006013094B4 (de) 2006-03-20 2006-03-20 Verfahren zur automatischen Beendigung eines Pyrolysereinigungsvorgangs bei einem Backofen

Publications (3)

Publication Number Publication Date
EP1837599A2 EP1837599A2 (de) 2007-09-26
EP1837599A3 EP1837599A3 (de) 2009-12-30
EP1837599B1 true EP1837599B1 (de) 2014-02-26

Family

ID=38276061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07004628.9A Not-in-force EP1837599B1 (de) 2006-03-20 2007-03-07 Verfahren zur automatischen Beendigung eines Pyrolysereinigungsvorgangs bei einem Backofen

Country Status (4)

Country Link
EP (1) EP1837599B1 (pl)
DE (1) DE102006013094B4 (pl)
ES (1) ES2452816T3 (pl)
PL (1) PL1837599T3 (pl)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TR201715311A2 (tr) * 2017-10-10 2019-04-22 Doruk Ev Gerecleri Sanayi Ve Ticaret Ltd Sirketi Pirolitik çevrimde enerji tasarrufu sağlanmış ve temizleme etkinliği arttırılmış konveksiyonel fırın.
CN110200515B (zh) * 2019-06-17 2020-11-03 杭州老板电器股份有限公司 烤制烹饪厨具及其控制方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4481404A (en) * 1982-12-22 1984-11-06 General Electric Company Turn-off control circuit for self-cleaning ovens
US4954694A (en) * 1989-01-31 1990-09-04 Matsushita Electric Industrial Co., Ltd. Cooking oven having function to automatically clean soils attached to inner walls thereof
DE19758860B4 (de) * 1997-02-17 2007-06-06 Miele & Cie. Kg Verfahren zur Steuerung eines Pyrolysereinigungsvorganges

Also Published As

Publication number Publication date
PL1837599T3 (pl) 2014-06-30
DE102006013094A1 (de) 2007-10-04
DE102006013094B4 (de) 2010-07-22
ES2452816T3 (es) 2014-04-02
EP1837599A2 (de) 2007-09-26
EP1837599A3 (de) 2009-12-30

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