EP0718562B1 - Kochapparat mit einem Glaskeramikkochfeld - Google Patents
Kochapparat mit einem Glaskeramikkochfeld Download PDFInfo
- Publication number
- EP0718562B1 EP0718562B1 EP95119087A EP95119087A EP0718562B1 EP 0718562 B1 EP0718562 B1 EP 0718562B1 EP 95119087 A EP95119087 A EP 95119087A EP 95119087 A EP95119087 A EP 95119087A EP 0718562 B1 EP0718562 B1 EP 0718562B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flame
- time
- gas
- control means
- electric igniter
- 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.)
- Expired - Lifetime
Links
- 238000010411 cooking Methods 0.000 title claims description 13
- 239000002241 glass-ceramic Substances 0.000 title claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 10
- 239000007858 starting material Substances 0.000 description 14
- 238000012806 monitoring device Methods 0.000 description 10
- 238000001514 detection method Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008033 biological extinction Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
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
- 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 radiant burners, each of which is a gas supply device with 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, for example, from DE 40 03 799 C1 known.
- the gas burner is connected to a Glow igniter ignited and the presence or over an ionization path Monitored for the absence of a gas flame.
- the glow igniter is switched off via a control device.
- Monitoring devices of this type have the advantage of promptly igniting the glow plug switch off after igniting a flame and thus unnecessary heating up prevent.
- the disadvantage of such solutions is that the gas flame after their Ignition and after detection by the ionization path in the start-up phase does not always have a stable burning behavior. Such hangs namely, very strongly on the gas mixture used. Is the burning behavior the gas flame is not yet stable, it can go out again with the Consequence that the arrangement recognize the extinction of the flame and a new one Start must initiate. Because for security reasons the number of attempts to restart In such cases, is only allowed to be small within a certain period inconsistent behavior of the ignition mechanism, with intermittent interruptions, expected.
- the object of the invention set to bridge the unsafe burner start-up phase without the glow starter to keep burning for an unnecessarily long time.
- the invention proposes that characterized in claim 1 Characteristics before.
- the basic idea of the proposed solution is to turn off the gas flame after a first predetermined time, which is statistically highly likely a stable burner pattern can be expected by the flame detection device to have it checked for presence. If there is a flame, the Glow starter switched off, if there is no flame, then after a second predetermined time, which corresponds to the prescribed safety time, again Check the presence of the gas flame. If this is still not available, So it is assumed that it is an accident and the cooking apparatus is switched to a so-called lockout routine and not just the faulty, but all burners shut down.
- control device as the first predetermined Time a period of 5 seconds and as a second predetermined time outputs a period of 10 seconds.
- first predetermined Time a period of 5 seconds
- second predetermined time outputs a period of 10 seconds.
- control device is preferred realized by a microprocessor, but an ASIC can also be used for this Find.
- A is preferably used as the flame monitoring device Ionization path.
- a gas ceramic hob 1 is shown, under which a fleece 2 with 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. Receives your commands it from a usual handling knob 7 on the stove.
- For flame monitoring serves an ionization path 8, which is also electrical at the control device 6 connected.
- the arrangement works as follows. After operating the toggle 7 the glow igniter 5 is energized and heated, the solenoid valve 4 is opened and then the fleece ignited. From the control device 6 after commissioning the glow starter after a predetermined time, in the present case 5 seconds, an interrogation signal is given to the flame detection device 8 in such a way that their condition is used to determine 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. However, was not Flame detected, the glow igniter remains in operation and the control device is there after a second predetermined time, in the present case these are a further 5 Seconds, a renewed interrogation signal to the flame monitoring device 8. The glow starter is now switched off in any case. If a flame was detected, so the solenoid valve 5 remains open, if no flame was detected, it is it is it is closed and all burners of the cooking apparatus are switched off and outputting a signal on a display or a not shown Buzzer.
- FIG. 2a the states of action of several assemblies are along a time axis of a cooking apparatus. It can be seen that in the presence of a Operating voltage and actuation of the toggle first the blower for the Cooking device is 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 become. After a period of time the flame starts to ignite it a flame signal, initially with interruptions, is recognized and the igniter briefly switched on and off again until then, recognizable by the permanent running flame signal the flame burns constantly and the glow igniter finally is switched off.
- FIG. 2c shows a case in which after a short period of time Accident no successful ignition could be initiated. You can see that Similar to Figure 2b, a flame failure signal after the flame disappears given and at the same time the glow plug is energized. After a security period The igniter and the solenoid valve are switched off and a lockout signal generated.
- FIG. 3b A brief fault is described with reference to FIG. 3b, analogously to FIG 2 B. It can be seen that after the flame has extinguished at the time ta after a short time Time a flame failure signal is generated and at the same time the igniter is switched on becomes. At time t1, in the present case after 5 seconds, is the first time checked whether there is a flame. After the flame monitor 8 has recognized one and no longer emits a flame failure signal the glow starter is switched off at the end of the safety time ts. The solenoid valve remains open all the time. Another occurs at time t1 Check of the flame monitoring device 8 by the control device 6. After there is no flame failure signal, it will be on properly burning flame closed and proper operation stated. At this point the igniter is no longer actuated.
- FIG. 3c analogous to FIG. 2c, shows an accident that cannot be remedied described. It can be seen that after the flame disappears within time ta after a short time a flame failure signal is detected and the glow starter 5 is energized. At time t1, it is checked for the first time whether there is a flame is; after this is not the case and the flame failure signal persists, remains the detonator continues to be energized. At the end of the safety time ts, the Control device 6 again checks the flame monitoring device 8. There is still a flame failure signal to indicate that The absence of a flame.
- the igniter is switched off, the solenoid valve closed and the system switched to a lockout routine, in which a signal either to an optical or to an acoustic display is issued, to indicate that the user has completed the entire switching process including toggle actuation starts again.
- FIGS. 3a and 3b show that in the arrangement according to the invention a multiple ignition of the igniter to achieve a stable flame pattern on the gas burner, but not that the igniter is either off or on and not "flickering". With that, the achieved advantages of the invention.
Landscapes
- 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)
Description
- Figur 1
- in schematischer Darstellung einen Kochapparat mit Steuereinrichtung;
- Figuren 2a - 2c
- die Darstellung verschiedener Zündvorgänge bei einem bekannten Kochapparat;
- Figuren 3a - 3c
- die Darstellung verschiedener Zündvorgänge bei einem erfindungsgemäßen Kochapparat.
Claims (5)
- Kochapparat mit einem Glaskeramikkochfeld und einem oder mehreren Gasstrahlungsbrennern, von denen jeder eine Gasversorgungseinrichtung mit Magnetventil, einen Glühzünder, eine Flammenüberwachungseinrichtung und einen Ein-/Ausschalter für den Glühzünder sowie eine Steuereinrichtung für den Betrieb und die Überwachung des Brenners aufweist,
dadurch gekennzeichnet,daß die Steuereinrichtung (6) nach einer ersten vorbestimmten Zeit nach der Zündung des Glühzünders (5) und nahezu gleichzeitigem Einschalten des Magnetventils (4) die Flammenüberwachungseinrichtung (8) auf das Vorhandensein einer Gasflamme abfragt,daß die Steuereinrichtung (6) bei Vorhandensein einer Gasflamme den Glühzünder (5) abschaltet und einen ordnungsgemäßen Betrieb konstatiert, ohne daß eine weitere Abfrage der Flammenüberwachungseinrichtung (8) erfolgt,daß die Steuereinrichtung (6) nur bei Nichtvorhandensein einer Flamme und erst nach einer vorgegebenen zweiten Zeit (ts) die Flammenüberwachungseinrichtung (8) ein zweites Mal abfragt und bei Vorhandensein einer Gasflamme den Glühzünder (5) abschaltet bzw. bei Nichtvorhandensein eine Störabschaltung des betreffenden Brenners vornimmt. - Kochapparat nach Anspruch 1,
dadurch gekennzeichnet,
daß die Steuereinrichtung (6) bei Erhalt eines Signals der Flammenüberwachungseinrichtung (8) wegen Erlöschens der Gasflamme einen erneuten Startversuch des Glühzünders (5) vornimmt, ohne das Magnetventil (4) zwischendurch abzuschalten. - Kochapparat nach Anspruch 1,
dadurch gekennzeichnet,
daß die Steuereinrichtung (6) als erste vorbestimmte Zeit 5 sec. und als zweite vorbestimmte Zeit 10 sec. ausgibt. - Kochapparat nach Anspruch 1,
dadurch gekennzeichnet,
daß die Steuereinrichtung (6) als Mikroprozessor ausgebildet ist. - Kochapparat nach Anspruch 1,
dadurch gekennzeichnet,
daß als Flammenüberwachungseinrichtung (8) eine Ionisationsstrecke vorgesehen ist.
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 EP0718562A2 (de) | 1996-06-26 |
| EP0718562A3 EP0718562A3 (de) | 1996-12-27 |
| EP0718562B1 true EP0718562B1 (de) | 2000-02-23 |
Family
ID=6536874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95119087A Expired - Lifetime EP0718562B1 (de) | 1994-12-23 | 1995-12-05 | Kochapparat mit einem Glaskeramikkochfeld |
Country Status (3)
| Country | Link |
|---|---|
| EP (1) | EP0718562B1 (de) |
| JP (1) | JPH08215039A (de) |
| DE (2) | DE4446237A1 (de) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6030205A (en) * | 1995-08-18 | 2000-02-29 | General Electric Company | Gas oven control |
| DE19949600A1 (de) * | 1999-10-14 | 2001-04-19 | Bsh Bosch Siemens Hausgeraete | Gasbeheiztes Hausgerät |
| 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 |
Family Cites Families (3)
| 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 |
| DE4003799C1 (de) | 1990-02-08 | 1991-04-18 | Cramer Gmbh & Co Kg, 5750 Menden, De | |
| DE4307073C2 (de) * | 1993-03-06 | 2003-12-24 | Dometic Gmbh | Steuereinrichtung für einen Gasbrenner eines Kochfeldes mit Glaskeramikkochfläche |
-
1994
- 1994-12-23 DE DE4446237A patent/DE4446237A1/de not_active Withdrawn
-
1995
- 1995-10-31 JP JP7283961A patent/JPH08215039A/ja active Pending
- 1995-12-05 DE DE59507842T patent/DE59507842D1/de not_active Expired - Fee Related
- 1995-12-05 EP EP95119087A patent/EP0718562B1/de not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| DE59507842D1 (de) | 2000-03-30 |
| EP0718562A2 (de) | 1996-06-26 |
| DE4446237A1 (de) | 1996-06-27 |
| EP0718562A3 (de) | 1996-12-27 |
| JPH08215039A (ja) | 1996-08-27 |
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