EP2354666A2 - Selbstreinigungsverfahren für einen Ofen - Google Patents

Selbstreinigungsverfahren für einen Ofen Download PDF

Info

Publication number
EP2354666A2
EP2354666A2 EP11382013A EP11382013A EP2354666A2 EP 2354666 A2 EP2354666 A2 EP 2354666A2 EP 11382013 A EP11382013 A EP 11382013A EP 11382013 A EP11382013 A EP 11382013A EP 2354666 A2 EP2354666 A2 EP 2354666A2
Authority
EP
European Patent Office
Prior art keywords
approximately
temperature
heating element
cavity
oven
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Withdrawn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
EP11382013A
Other languages
English (en)
French (fr)
Other versions
EP2354666A3 (de
Inventor
Urtzi Zubiate Gorosabel
Egoitz Arteaga Zugaza-Artaza
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.)
Fagor Electrodomesticos SCL
Original Assignee
Fagor Electrodomesticos SCL
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 Fagor Electrodomesticos SCL filed Critical Fagor Electrodomesticos SCL
Publication of EP2354666A2 publication Critical patent/EP2354666A2/de
Publication of EP2354666A3 publication Critical patent/EP2354666A3/de
Withdrawn legal-status Critical Current

Links

Images

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
    • 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

Definitions

  • This invention relates to self-cleaning methods for ovens, and in particular to self-cleaning methods for ovens using a pyrolysis process.
  • ovens in the prior art that comprise a self-cleaning function, which is performed by means of a pyrolysis process. During this process a high temperature is generated in a cavity of the oven to eliminate the fat or solid bodies deposited on the walls delimiting the cavity. As a minimum the high temperature has to be around 500°C, and must be maintained for a preset time period to allow the self-cleaning to be performed correctly, which is usually stipulated as approximately 45 minutes.
  • the prior art contains numerous pyrolysis procedures. Smoke is generated during these processes as the waste present in the cavity of the oven is burnt, and generally speaking these processes or methods begin with an initial phase, the purpose of which is to reduce the generation of smoke.
  • One of these methods is described in document US 6417493 B1 .
  • the temperature of the cavity of the oven is increased in an initial phase to a first preset temperature, lower than the temperature necessary to perform the self-cleaning process.
  • the temperature is subsequently increased to a second temperature that corresponds with a temperature that is sufficiently high for self-cleaning to occur by means of pyrolysis.
  • Said method then comprises a plurality of subsequent phases that cause the repeated decrease and increase of the temperature in the cavity according to a preset criterium.
  • the self-cleaning method for an oven of the invention comprises an initial phase in which the temperature in a cavity of the oven is increased to approximately a first preset temperature preset at the most, and an adjustment phase, subsequent to an initial phase, in which the temperature in the cavity is increased to approximately a second preset temperature preset at the most.
  • the second temperature corresponds with an appropriate temperature for performing the pyrolytic process, which is what enables the self-cleaning of the oven, and the first temperature is lower than said second temperature, but is sufficiently high to burn the scraps in the cavity of the oven.
  • the method also comprises a maintenance phase, subsequent to the adjustment phase, in which the second internal temperature of the oven is maintained for a specific period of time, the aim being that said second temperature is maintained in the cavity of the oven for a sufficient and necessary time to allow the self-cleaning to be performed correctly.
  • the smallest possible amount of smoke is generated (with the initial phase), and a high temperature (the second temperature) is reached in the cavity of the oven that is sufficient for the self-cleaning process to occur, and which is kept substantially constant, the cleaning being performed correctly.
  • the self-cleaning method of the invention is designed for its use in ovens 100, preferably domestic ones, comprising a cavity 101, where the food to be cooked and/or heated is disposed, and at least three heating elements 1, 2 and 3.
  • a first heating element 1 and a second heating element 2 are disposed in the top part of said cavity 101, and a third heating element 3 is disposed beneath said cavity 101.
  • the first heating element 1 corresponds with the heating element of an oven that is commonly known as a "dome”
  • the second heater corresponds with the heating element of an oven that is commonly known as a "grill", such as those shown by way of example in Figure 2
  • the third element 3 corresponding with the heating element of an oven that is commonly known as a "base”.
  • the one with most power is the second heating element 2 due to the fact that it needs high power to perform the main function for which it has mostly been designed (a grill).
  • the first heater 1 comprises a power of 1400W
  • the second heater 2 comprises a power of 1600W
  • the third heater 3 comprises a power of 1300W.
  • the method of the invention is not limited to the use of heating elements comprising these powers, it being capable of being used in an oven comprising heating elements with different powers to those defined, for example.
  • the method comprises an initial phase Es in which the temperature in the cavity 101 of the oven 100 is increased to approximately a first preset temperature T1 at the most, which preferably corresponds with approximately 435°C, only the heating elements 1 and 2 being activated for this purpose.
  • a first preset temperature T1 at the most which preferably corresponds with approximately 435°C, only the heating elements 1 and 2 being activated for this purpose.
  • Most of the dirt is usually deposited in the bottom part of the cavity 101, so that if the third heating element 3 is activated from the beginning, a lot of smoke can be generated, which is not advisable as the user can notice its effects and be discomforted by it. If it is not activated, less smoke is generated by said dirt deposited in the bottom part of the oven 100 as said dirt burns at a slower rate.
  • the oven 100 comprises a temperature sensor not shown in these figures, which is preferably disposed in the centre of said cavity 101, fixed to the rear wall 101 a of said cavity.
  • the method comprises, subsequent to the initial phase ES, an adjustment phase Ea in which the temperature in the cavity 101 of the oven 100 is increased to approximately a second preset temperature T2 at the most.
  • Said second temperature T2 corresponds with a temperature necessary for pyrolysis to occur, which is sufficient if it is around 500°C.
  • said second temperature T2 is comprised within a range delimited between approximately 500°C and approximately 550°C.
  • the walls 101 a that delimit the cavity 101, except, generally speaking, a door 102 of the oven that provides access to said cavity 101, are covered with enamel, as a result of which it is recommended that the temperature of 550°C not be exceeded on said walls 101 a in order to prevent the enamel from being damaged.
  • the heating elements 1 and 2 are activated to 100% of their power.
  • the adjustment phase Ea begins, although preferably a maximum time period for the duration of the initial phase Es is established, so that said adjustment phase Ea begins if, once said time period has elapsed, the temperature in the cavity 101 has not reached said first temperature T1.
  • said time period is approximately 35 minutes.
  • Figure 3 shows a first embodiment of the method of the invention, the temperature T (°C) in the cavity 101 being represented on the ordinate axis, and the development of the method in time t being represented on the abscissa axis.
  • the first embodiment of the method lasts approximately 120 minutes.
  • the duration of the adjustment phase Ea is fixed, being approximately 35 minutes.
  • the duration of the maintenance phase Em thus depends on the time required in the initial phase Es for the first temperature T1 to be reached, its minimum duration being 50 minutes (in the event that once the 35 minutes of the initial phase have elapsed, the temperature in the cavity 101 has not reached the first temperature T1), which is sufficient time for the pyrolysis to be performed correctly.
  • 45 minutes at the necessary temperature (a minimum in the region of 500°C) is required for the pyrolysis to be performed correctly.
  • the heating elements 1 and 2 it is possible to increase the temperature in the cavity 101 to the temperature required to generate the pyrolysis, although there are areas of said cavity 101 that are heated less than the average.
  • the third heating element 3 is activated.
  • said activation does not cause the excessive generation of smoke (it can even be the case that no smoke is generated).
  • the cavity 101 has already been heated in the initial phase Es, and as said heating elements 1 and 2 remain activated in said adjustment phase Ea, the power of the third heating element 3 remains activated, so that said third heating element 3 provides only the heat necessary to heat said areas, thereby preventing damage from being caused to the enamel of the closest walls 101 a due to excessive temperature.
  • said third heating element 3 is delimited between approximately 30% and approximately 40% of its maximum power, preferably at 35%.
  • said third heating element 3 does not emanate heat only to said areas as they are not disposed with means for directing the heat, for example.
  • the power of the heating elements 1 and 2 is also limited.
  • the first heating element 1 is delimited between approximately 65% and approximately 75% of its maximum power, preferably at 70%
  • the second heating element 2 is delimited between approximately 85% and approximately 95% of its maximum power, preferably at 90%. This thus prevents the overheating of the walls 101 a of the cavity 101 and prevents the risk of the enamel on them from being damaged.
  • a fan 4 disposed in the cavity 101 is activated at the same time as the three heating elements 1, 2 and 3 remain activated, so that a flow of air is generated that distributes the heat generated by the heating elements 1, 2 and 3 by the entire cavity 101.
  • the fan 4 is attached to a rear wall 101 a of the cavity 101.
  • the power of the first heating element 1 is delimited between approximately 45% and approximately 55% of its maximum power, preferably at 50%, and the power of the third heating element 3 is delimited between approximately 43% and approximately 53% of its maximum power, preferably at 48%. It has been found that if the power of the first heating element 1 is limited, it is not necessary to limit the power of the second heater 2, as thanks to the flow of air and said limit the wall 101 a closest to the heating elements 1 and 2 does not suffer excessively high temperatures. In addition, it is advantageous that the power of the second heating element 2, which is greater than the power of the first heating element 1, can be disposed in order to keep the temperature in the cavity 101 substantially equal to the second temperature T2.
  • the limiting of a heating element 1, 2, 3 does not mean that said heating element 1, 2, 3 operates at said power. It means that it operates at that power at the most.
  • the oven 100 comprises control means (not shown in the figures) whose function is to limit the powers, and which also have the function of causing the passage from one phase to another of the method, and of ensuring the temperature in the cavity 101 is substantially equal to the second temperature T2 when required.
  • control means are adapted to adjust the power used at each moment by each heating element 1, 2 and 3, without them exceeding the maximum power to which they have been limited, and, preferably, they cause proportional changes in the powers at which said heating elements 1, 2 and 3 operate, thereby increasing and/or decreasing all of them by the same percentage.
  • the control means correspond with a microcontroller, a microprocessor, a printed circuit control board or with an equivalent device.
  • Figure 4 shows a second embodiment of the method of the invention, the temperature T (°C) in the cavity 101 being represented on the ordinate axis, and the development of the method in time t being represented on the abscissa axis.
  • the second embodiment of the method lasts approximately 90 minutes.
  • the duration of the adjustment phase Ea and the maintenance phase Em depends on the time required in the initial phase Es for the first temperature T1 to be reached, its minimum duration being 50 minutes (in the event that once the 35 minutes of the initial phase have elapsed, the temperature in the cavity 101 has not reached the first temperature T1), which is sufficient time for the pyrolysis to be performed correctly.
  • 45 minutes at the necessary temperature are required for the pyrolysis to be performed correctly.
  • the third heating element 3 and the fan 4 are activated, and the first heating element 1 and the second heating element 2 remain activated.
  • both the fan 4 and the three heating elements remain activated.
  • the first heating element 1 is delimited, at the most, between approximately 45% and 55% of its maximum power, preferably at 50%, the second heating element 2 has no power limits, and the third heating element 3 between approximately 43% and approximately 53% of its maximum power, at the most, preferably at 48%.
  • the same limits are maintained as in the adjustment phase Ea, so that in the second embodiment the powers are only limited once (at the beginning of the adjustment phase Ea).
  • the limiting of a heating element does not mean that said heating element operates at said power. It means that it operates at that power as a maximum.
  • the oven 100 comprises control means (not shown in the figures) whose function is to limit the powers, and which also have the function of causing the passage from one phase to another of the method, and of ensuring the temperature in the cavity 101 is substantially equal to the second temperature T2 when required.
  • control means are adapted to adjust the power used at each moment by each heating element 1, 2 and 3, without them exceeding the maximum power to which they have been limited, and, preferably, they cause proportional changes in the powers at which said heating elements 1, 2 and 3 operate, thereby increasing and/or decreasing all of them by the same percentage.

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 Stoves And Ranges (AREA)
  • Electric Ovens (AREA)
  • Cleaning By Liquid Or Steam (AREA)
  • Cleaning In General (AREA)
EP11382013A 2010-01-29 2011-01-24 Selbstreinigungsverfahren für einen Ofen Withdrawn EP2354666A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES201030121A ES2407558B1 (es) 2010-01-29 2010-01-29 Método de auto-limpieza para un horno.

Publications (2)

Publication Number Publication Date
EP2354666A2 true EP2354666A2 (de) 2011-08-10
EP2354666A3 EP2354666A3 (de) 2012-12-05

Family

ID=44025278

Family Applications (2)

Application Number Title Priority Date Filing Date
EP11382014.6A Not-in-force EP2354670B1 (de) 2010-01-29 2011-01-24 Tür zum Schließen eines Garraums eines Haushaltsofens
EP11382013A Withdrawn EP2354666A3 (de) 2010-01-29 2011-01-24 Selbstreinigungsverfahren für einen Ofen

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP11382014.6A Not-in-force EP2354670B1 (de) 2010-01-29 2011-01-24 Tür zum Schließen eines Garraums eines Haushaltsofens

Country Status (2)

Country Link
EP (2) EP2354670B1 (de)
ES (2) ES2407558B1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210356136A1 (en) * 2013-10-02 2021-11-18 Samsung Electronics Co., Ltd. Cooking apparatus and method of controlling the same

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6417493B1 (en) 1999-09-13 2002-07-09 Maytag Corporation Self-cleaning method for a cooking appliance

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2365927A1 (fr) * 1976-09-28 1978-04-21 Cepem Procede et dispositif de regulation de la temperature de nettoyage d'un four
DE3700136A1 (de) * 1987-01-03 1988-07-14 Gaggenau Werke Verfahren zum pyrolitischen reinigen eines backofens
DE4223656A1 (de) * 1992-07-17 1994-01-20 Bosch Siemens Hausgeraete Selbstreinigungsverfahren für Herde
GB2325299B (en) * 1997-05-16 2000-01-12 Creda Ltd Pyrolytic self-cleaning ovens
DE10143926B4 (de) * 2001-09-07 2004-06-24 BSH Bosch und Siemens Hausgeräte GmbH Gargerätetür
DE10246498A1 (de) * 2002-10-04 2004-04-22 Miele & Cie. Kg Verfahren zur Temperaturregelung eines Backofens mit Katalysator
US6730879B1 (en) * 2003-03-12 2004-05-04 General Electric Company Self-cleaning systems and methods
FR2892182B1 (fr) * 2005-10-17 2008-01-18 Brandt Ind Sas Porte pour enceinte de cuisson
DE102006013093B3 (de) * 2006-03-20 2007-04-12 Miele & Cie. Kg Verfahren zur Steuerung eines Pyrolysereinigungsvorgangs bei einem Backofen

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6417493B1 (en) 1999-09-13 2002-07-09 Maytag Corporation Self-cleaning method for a cooking appliance

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210356136A1 (en) * 2013-10-02 2021-11-18 Samsung Electronics Co., Ltd. Cooking apparatus and method of controlling the same
US11898758B2 (en) * 2013-10-02 2024-02-13 Samsung Electronics Co., Ltd. Cooking apparatus and method of controlling the same

Also Published As

Publication number Publication date
ES2407558A1 (es) 2013-06-13
EP2354666A3 (de) 2012-12-05
EP2354670A2 (de) 2011-08-10
EP2354670A3 (de) 2012-12-05
ES2583403T3 (es) 2016-09-20
EP2354670B1 (de) 2016-07-13
ES2407558B1 (es) 2014-04-29

Similar Documents

Publication Publication Date Title
US8669500B2 (en) Interface device for oven
US20110146653A1 (en) Cooking device
WO2008118639A3 (en) Convection preheat system and method for radiant baking
CN101953645B (zh) 烤箱
CA2458896A1 (en) Combination heating system for a cooking appliance
CN106724890B (zh) 烘烤方法、烘烤装置和电烤箱
WO2002056640A3 (en) Thermal/convection oven including halogen lamps
JP4781406B2 (ja) 加熱調理器
JP4199228B2 (ja) グリル装置
KR200461130Y1 (ko) 구이용 전열조리 장치
KR20120000965U (ko) 구이기
EP2354666A2 (de) Selbstreinigungsverfahren für einen Ofen
US20230200586A1 (en) Air fry cooking method and apparatus
KR20060115331A (ko) 스팀 오븐에서 조리된 음식을 유지하기 위한 방법
US5964211A (en) Pyrolytic self-cleaning gas oven
JP2009284926A (ja) 加熱調理器
JP2005233467A (ja) 加熱調理器
US20090139511A1 (en) Charcoal restraints
JP3109403B2 (ja) オーブントースター
JP4329405B2 (ja) 加熱調理装置
JP2940426B2 (ja) オーブントースター
KR200459206Y1 (ko) 가스레인지의 그릴
US20160348925A1 (en) Smokeless convection barbecue grill
CN207599812U (zh) 一种层阶式加热电磁炉
CN114514404A (zh) 用于操作烹饪炉的方法

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

PUAL Search report despatched

Free format text: ORIGINAL CODE: 0009013

AK Designated contracting states

Kind code of ref document: A3

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

RIC1 Information provided on ipc code assigned before grant

Ipc: F24C 14/02 20060101AFI20121026BHEP

Ipc: F24C 7/08 20060101ALI20121026BHEP

17P Request for examination filed

Effective date: 20130605

RBV Designated contracting states (corrected)

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

17Q First examination report despatched

Effective date: 20131115

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20140527