EP0718562A2 - Appareil de cuisson avec une surface de cuisson en vitro-céramique - Google Patents

Appareil de cuisson avec une surface de cuisson en vitro-céramique Download PDF

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Publication number
EP0718562A2
EP0718562A2 EP95119087A EP95119087A EP0718562A2 EP 0718562 A2 EP0718562 A2 EP 0718562A2 EP 95119087 A EP95119087 A EP 95119087A EP 95119087 A EP95119087 A EP 95119087A EP 0718562 A2 EP0718562 A2 EP 0718562A2
Authority
EP
European Patent Office
Prior art keywords
flame
igniter
gas
control device
switched
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.)
Granted
Application number
EP95119087A
Other languages
German (de)
English (en)
Other versions
EP0718562B1 (fr
EP0718562A3 (fr
Inventor
Edgar Vom Schloss
Christoph Paul Kalmer
Gerhard Becke
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.)
Diehl Stiftung and Co KG
Original Assignee
Diehl GmbH and Co
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 Diehl GmbH and Co filed Critical Diehl GmbH and Co
Publication of EP0718562A2 publication Critical patent/EP0718562A2/fr
Publication of EP0718562A3 publication Critical patent/EP0718562A3/fr
Application granted granted Critical
Publication of EP0718562B1 publication Critical patent/EP0718562B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • F24C3/126—Arrangement or mounting of control or safety devices on ranges
    • 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
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/04—Stoves or ranges for gaseous fuels with heat produced wholly or partly by a radiant body, e.g. by a perforated plate
    • F24C3/06—Stoves or ranges for gaseous fuels with heat produced wholly or partly by a radiant body, e.g. by a perforated plate without any visible flame
    • F24C3/067—Ranges

Definitions

  • the invention relates to a cooking apparatus with a glass ceramic hob and one or more gas radiation burners, each of which has a gas supply device with a solenoid valve, a glow starter, a flame monitoring device and an on / off switch for the glow starter and a control device for the operation and monitoring of the burner .
  • Cooking apparatuses of the type described above are known, for example, from DE 40 03 799 C1.
  • the gas burner is ignited via a glow igniter and the presence or absence of a gas flame is monitored via an ionization path.
  • the glow igniter is switched off via a control device.
  • Monitoring devices of this type have the advantage of switching off the glow starter as soon as a flame is ignited and thus preventing unnecessary heating.
  • the disadvantage of such solutions is that the gas flame does not always have a stable combustion behavior after it has been ignited and after it has been recognized by the ionization path in the start-up phase. This depends very much on the gas mixture used. If the burning behavior of the gas flame is not yet stable, it can go out again, with the result that the arrangement must recognize the extinction of the flame and initiate a new start. Since the number of attempts to restart within a certain period of time may only be small for safety reasons, the ignition mechanism may behave erratically with intermittent interruptions in such cases.
  • the invention has set itself the task of bridging the unsafe burner start-up phase without letting the glow igniter continue to burn unnecessarily long.
  • the invention proposes the features characterized in claim 1.
  • the basic idea of the proposed solution is to have the gas flame checked for presence by the flame detection device after a first, predetermined time which, statistically speaking, allows a stable burner pattern to be expected with high probability. If there is a flame, the glow igniter is switched off, if there is no flame, the presence of the gas flame is checked again after a second predetermined time, which corresponds to the prescribed safety time. If this is still not available, it is assumed that it is a malfunction and the cooking apparatus is switched to a so-called lockout routine and not only the faulty but all the burners are shut down.
  • control device outputs a period of 5 seconds as the first predetermined time and a period of 10 seconds as the second predetermined time.
  • a period of 5 seconds as the first predetermined time
  • a period of 10 seconds as the second predetermined time.
  • control device is preferably implemented by a microprocessor, but an ASIC can also be used for this Find.
  • An ionization path is preferably used as the flame monitoring device.
  • a gas ceramic hob 1 is shown, under which a fleece 2 is arranged.
  • the gas is supplied via a gas line 3 and a solenoid valve 4.
  • a glow starter 5 is controlled by an electronic control device 6.
  • the latter is also connected to the solenoid valve 4. It receives its commands from a usual handling knob 7 on the stove.
  • An ionization path 8, which is also electrically connected to the control device 6, is used for flame monitoring.
  • the arrangement works as follows. After actuation of the knob 7, the glow starter 5 is energized and heated, the solenoid valve 4 is opened and then the fleece is ignited. After starting the glow igniter after a predetermined time, in the present case of 5 seconds, the control device 6 sends a query signal to the flame detection device 8 in such a way that its state recognizes whether a gas flame is present or not. If a flame has been detected by the flame monitoring device 8, it is detected switched off by the control device 6 of the igniter 5. If, on the other hand, no flame has been detected, the glow igniter remains in operation and the control device sends a new query signal to the flame monitoring device 8 after a second predetermined time, in the present case this is a further 5 seconds.
  • the glow starter is now switched off in any case. If a flame was detected, the solenoid valve 5 remains open, if no flame was detected, it is closed and all burners of the cooking apparatus are switched off and a signal is output on a display (not shown) or a buzzer.
  • FIG 2a the states of action of several assemblies of a cooking apparatus are shown along a time axis. It can be seen that in the presence of an operating voltage and actuation of the toggle, the fan for the cooking apparatus is first switched on and after a waiting time specified by the device, the glow starter and after a preheating time, the solenoid valve for the gas flow is switched on. After a certain time, the flame begins to ignite, a flame signal is recognized, initially with interruptions, and the igniter is briefly switched on and off again, until then, as can be seen from the continuous flame signal, the flame burns constantly and the glow igniter is finally switched off.
  • FIG. 2b shows that an already existing flame has gone out for some reason, a flame failure signal being emitted by the flame monitoring device and the igniter being switched on at the same time. It can also be seen here that the igniter, after the flame burns stably, is finally switched off after several interruptions and the flame failure signal disappears. In this very brief malfunction, the solenoid valve was not switched off, but remained open after an ignition process was successfully initiated within a safety period.
  • FIG. 2c shows a case in which a successful ignition could not be initiated after a brief fault. It can be seen that, similarly to FIG. 2b, a flame failure signal is given after the flame has disappeared and the glow igniter is energized at the same time. After a safety time ts, the igniter and the solenoid valve are switched off and a lockout signal is generated.
  • a brief fault is described with reference to FIG. 3b, analogously to FIG. 2b. It can be seen that after the flame has extinguished at the time ta, a flame failure signal is generated after a short time and the igniter is switched on at the same time. At time t1, in the present case after 5 seconds, it is checked for the first time whether a flame is present. After the flame monitoring device 8 has recognized one and no longer emits a flame failure signal, the glow igniter is switched off at the end of the safety time ts. The solenoid valve remains open all the time. At time t1, the flame monitoring device 8 is checked again by the control device 6. After no flame failure signal is present, a properly burning flame is concluded and correct operation is confirmed. At this point the igniter is no longer actuated.
  • FIG. 3c A fault that cannot be remedied is described with reference to FIG. 3c, analogously to FIG. 2c. It can be seen that after the flame disappears within a short time a flame failure signal is detected and the glow igniter 5 is energized. At time t1, it is checked for the first time whether a flame is present; after this is not the case and the flame failure signal is present, the igniter remains energized. At the end of the safety time ts, the flame monitoring device 8 is checked again via the control device 6. There is still a flame failure signal as a sign of the absence of a flame.
  • the igniter is switched off, the solenoid valve is closed and the system is switched to a lockout routine in which a signal is output either to an optical or to an acoustic display, as a sign that the user restarts the entire switching process including toggle actuation.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Control Of Combustion (AREA)
  • Baking, Grill, Roasting (AREA)
  • Cookers (AREA)
EP95119087A 1994-12-23 1995-12-05 Appareil de cuisson avec une surface de cuisson en vitro-céramique Expired - Lifetime EP0718562B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4446237 1994-12-23
DE4446237A DE4446237A1 (de) 1994-12-23 1994-12-23 Kochapparat mit einem Glaskeramikkochfeld

Publications (3)

Publication Number Publication Date
EP0718562A2 true EP0718562A2 (fr) 1996-06-26
EP0718562A3 EP0718562A3 (fr) 1996-12-27
EP0718562B1 EP0718562B1 (fr) 2000-02-23

Family

ID=6536874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95119087A Expired - Lifetime EP0718562B1 (fr) 1994-12-23 1995-12-05 Appareil de cuisson avec une surface de cuisson en vitro-céramique

Country Status (3)

Country Link
EP (1) EP0718562B1 (fr)
JP (1) JPH08215039A (fr)
DE (2) DE4446237A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999020943A1 (fr) * 1997-10-20 1999-04-29 General Electric Company Commande d'un four a gaz
WO2001027537A1 (fr) * 1999-10-14 2001-04-19 BSH Bosch und Siemens Hausgeräte GmbH Appareil menager chauffe au gaz

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10217008B4 (de) 2002-04-16 2006-04-06 Miele & Cie. Kg Verfahren für den Betrieb eines gasbetriebenen Koch-oder Bratgeräts und Vorrichtung zur Durchführung des Verfahrens
CN108006710B (zh) * 2017-12-25 2024-01-05 广东美的厨房电器制造有限公司 灶具及其点火控制装置、方法
US20240200783A1 (en) * 2022-12-14 2024-06-20 Whirlpool Corporation Flame ionization detection for pan detection and power management in a gas cooktop

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4003799C1 (fr) 1990-02-08 1991-04-18 Cramer Gmbh & Co Kg, 5750 Menden, De

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3844082A1 (de) * 1988-12-28 1990-07-05 Cramer Gmbh & Co Kg Kochapparat mit zumindest einem glaskeramik-kochfeld
DE4307073C2 (de) * 1993-03-06 2003-12-24 Dometic Gmbh Steuereinrichtung für einen Gasbrenner eines Kochfeldes mit Glaskeramikkochfläche

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4003799C1 (fr) 1990-02-08 1991-04-18 Cramer Gmbh & Co Kg, 5750 Menden, De

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6030205A (en) * 1995-08-18 2000-02-29 General Electric Company Gas oven control
WO1999020943A1 (fr) * 1997-10-20 1999-04-29 General Electric Company Commande d'un four a gaz
WO2001027537A1 (fr) * 1999-10-14 2001-04-19 BSH Bosch und Siemens Hausgeräte GmbH Appareil menager chauffe au gaz

Also Published As

Publication number Publication date
DE4446237A1 (de) 1996-06-27
EP0718562B1 (fr) 2000-02-23
JPH08215039A (ja) 1996-08-27
EP0718562A3 (fr) 1996-12-27
DE59507842D1 (de) 2000-03-30

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