EP0271826A2 - Minuterie électronique pour cuisinière - Google Patents
Minuterie électronique pour cuisinière Download PDFInfo
- Publication number
- EP0271826A2 EP0271826A2 EP87118304A EP87118304A EP0271826A2 EP 0271826 A2 EP0271826 A2 EP 0271826A2 EP 87118304 A EP87118304 A EP 87118304A EP 87118304 A EP87118304 A EP 87118304A EP 0271826 A2 EP0271826 A2 EP 0271826A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- control circuit
- circuit breaker
- consumer
- selector switch
- component
- 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
Links
Images
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04G—ELECTRONIC TIME-PIECES
- G04G15/00—Time-pieces comprising means to be operated at preselected times or after preselected time intervals
- G04G15/006—Time-pieces comprising means to be operated at preselected times or after preselected time intervals for operating at a number of different times
Definitions
- the invention relates to an electronic stove timer with a control circuit, a display panel, with input elements and with a changeover switch in the control circuit, by means of which the consumer controlled by the timer via a circuit breaker can be switched from manual operation to automatic operation with digital input of at least one complete switching date.
- An electronic timer of this type is already known from DE-OS 33 20 128.
- the input elements for the digital display in the watch are used to switch from manual operation - this is the normal operation of the watch - to automatic operation.
- the selector switch for the consumer for example the knob for the hotplate control, must be set to zero and the clock itself must be reset from automatic to manual mode. If the selector switch is inadvertently not reset, the consumer receives power again when the clock is reset from automatic to manual mode without the user requesting this.
- the invention proposes the characterizing features of claim 1.
- the invention is based on the fact that it is determined whether, on the one hand, the circuit breaker for the consumer is open again after the switching date has expired and whether the selector switch has been reset to zero. As soon as the latter is the case, the control circuit of the time switch is given a signal which resets the time switch from automatic to manual mode. If, on the other hand, the selector switch is not reset to zero, the clock remains in automatic mode and the consumer cannot be energized again unintentionally, in this case energization is only possible when a new cooking time is entered.
- This arrangement results in the elimination of a mechanical switch for manual mode and automatic mode and offers and another advantage that the consumer does not receive any current in the event of incorrect operation.
- FIG. 1 the front view of a stove timer 1 is shown, in which one recognizes a digital display 2 for the display of minutes and hours. Furthermore, a rotary knob 3 for setting the digital display and function keys 4 are provided, by means of which it can be selected whether a cooking time or a cooking time end or a short time should be entered.
- FIG 2 an electronic circuit arrangement is shown, which is used to implement the invention and is installed in the timer except for the selector switch and the consumer.
- a power supply unit 7 an arrangement for level adjustment 8, a control circuit 9, a circuit breaker 11 actuated by a relay 10, a selector switch 12 and a consumer 13 and a high-resistance resistor 14 are provided on two poles 5 and 6 of the mains voltage supply.
- the power supply 7 is constructed in a conventional manner and contains a capacitor 15 for reducing the mains voltage, a Zener diode 16 for stabilization and a diode 17 and a capacitor 18 for rectifying the voltage for the control circuit 9, which is preferably a microprocessor and the entire process of Clock controls.
- the circuit arrangement 8 for level adjustment comprises two resistors 19 and 20 and a diode 21 and only serves to create a suitable input level for the control circuit 9, starting from the node 22.
- the signal line between this circuit arrangement 8 and the control circuit 9 is designated 23.
- the control circuit 9 switches a relay 10 on or off, which actuates the circuit breaker 11 in the control circuit for the consumer.
- This consumer 13 is, for example, a hotplate or the oven of an electric cooker.
- the power supply for the consumer can be set in several stages by the selector switch 12.
- the high-resistance resistor 14 between the switching point 22 and the pole 5 of the mains voltage serves to bridge the circuit breaker 11 and is important in the sense of the invention for the detection of its switching position, namely whether open or closed. If selector switch 12 and circuit breaker 11 are closed, then the assumption that pole 5 has a high potential means that the potential at node 22 is also high.
- the circuit arrangement described has the following mode of operation.
- the time switch is in manual mode, that is, by setting the selector switch, the consumer 13 can be actuated directly and operated with the set switching level.
- the circuit breaker 11 is closed. If a switching date, for example a cooking time of 3 hours and a cooking time end is entered via the function keys 4 and the rotary knob 3, the time of which is more than 3 hours later than the current time, the circuit breaker 11 is opened by the control circuit 9. At the current time, however, the user is already setting the intended heat setting via the selector switch. However, due to the open circuit breaker 11, the cooking process cannot begin yet.
- the selector switch 12 remains closed.
- the potential at node 22 is reduced to its low value again.
- the control circuit 9 does not yet receive any signal and the clock remains in automatic mode. The consumer cannot be energized again unless the cooking result requires an extension of the cooking time; in this case a new cooking time would have to be entered - without pressing the selector again.
- the transition of the potential at node 22 from low to zero potential is thus evaluated as a criterion for the fact that the line switch 11 is open and the selector switch 12 is opened. This state is indicative of the fact that a switching date has been processed and the time switch has to be switched back to manual mode.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Predetermined Time Intervals (AREA)
- Electric Clocks (AREA)
- Cookers (AREA)
- Baking, Grill, Roasting (AREA)
- Control Of High-Frequency Heating Circuits (AREA)
- Keying Circuit Devices (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3643260 | 1986-12-18 | ||
DE19863643260 DE3643260A1 (de) | 1986-12-18 | 1986-12-18 | Elektronische herdschaltuhr |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0271826A2 true EP0271826A2 (fr) | 1988-06-22 |
EP0271826A3 EP0271826A3 (en) | 1990-03-28 |
EP0271826B1 EP0271826B1 (fr) | 1993-03-17 |
Family
ID=6316481
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP87118304A Expired - Lifetime EP0271826B1 (fr) | 1986-12-18 | 1987-12-10 | Minuterie électronique pour cuisinière |
Country Status (3)
Country | Link |
---|---|
US (1) | US4769556A (fr) |
EP (1) | EP0271826B1 (fr) |
DE (2) | DE3643260A1 (fr) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0689687A1 (fr) * | 1993-03-19 | 1996-01-03 | TELAMO, Erkki | Procede et appareil d'interruption de l'alimentation en courant d'une charge electrique |
CA2239002C (fr) * | 1997-06-12 | 2002-05-28 | Jack J. Carter | Minuterie de prevention pour elements chauffants de cuisiniere |
WO2000054117A1 (fr) * | 1999-03-05 | 2000-09-14 | Ardem Pişirici Ve Isitici Cihazlar Sanayii A.Ş. | Minuterie numerique separee utilisee dans des appareils electromenagers |
US6863454B2 (en) | 2002-02-25 | 2005-03-08 | Ginfax Development Limited | Photographic film cartridge and camera including such |
US6773173B2 (en) * | 2001-11-02 | 2004-08-10 | Ginfax Development Ltd. | Photographic film cartridge and camera including such |
US6999293B2 (en) * | 2002-02-20 | 2006-02-14 | Erkki Telamo | Safety device for a delta-connected three-phase electric appliance |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2052798A (en) * | 1979-05-15 | 1981-01-28 | Sanyo Electric Co | Electronic control of cooking apparatus |
DE3044235A1 (de) * | 1980-11-25 | 1982-06-03 | Giovanni Ing.(grad.) 7000 Stuttgart Quinzio | Zusatzschaltgeraet |
EP0057993A2 (fr) * | 1981-01-22 | 1982-08-18 | Kabushiki Kaisha Toshiba | Cafetière |
DE3320128A1 (de) * | 1983-06-03 | 1984-12-06 | Diehl GmbH & Co, 8500 Nürnberg | Elektronische schaltuhr |
GB2165370A (en) * | 1984-10-05 | 1986-04-09 | Toshiba Kk | Circuit for controlling a rice cooker |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4266118A (en) * | 1977-04-25 | 1981-05-05 | Mitsubishi Denki Kabushiki Kaisha | Cooking control circuit for cooking range |
JPS61114488A (ja) * | 1984-11-09 | 1986-06-02 | 株式会社東芝 | 誘導加熱調理器 |
-
1986
- 1986-12-18 DE DE19863643260 patent/DE3643260A1/de active Granted
-
1987
- 1987-12-03 US US07/128,151 patent/US4769556A/en not_active Expired - Fee Related
- 1987-12-10 DE DE8787118304T patent/DE3784871D1/de not_active Expired - Fee Related
- 1987-12-10 EP EP87118304A patent/EP0271826B1/fr not_active Expired - Lifetime
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2052798A (en) * | 1979-05-15 | 1981-01-28 | Sanyo Electric Co | Electronic control of cooking apparatus |
DE3044235A1 (de) * | 1980-11-25 | 1982-06-03 | Giovanni Ing.(grad.) 7000 Stuttgart Quinzio | Zusatzschaltgeraet |
EP0057993A2 (fr) * | 1981-01-22 | 1982-08-18 | Kabushiki Kaisha Toshiba | Cafetière |
DE3320128A1 (de) * | 1983-06-03 | 1984-12-06 | Diehl GmbH & Co, 8500 Nürnberg | Elektronische schaltuhr |
GB2165370A (en) * | 1984-10-05 | 1986-04-09 | Toshiba Kk | Circuit for controlling a rice cooker |
Also Published As
Publication number | Publication date |
---|---|
DE3784871D1 (de) | 1993-04-22 |
DE3643260C2 (fr) | 1991-04-25 |
EP0271826A3 (en) | 1990-03-28 |
EP0271826B1 (fr) | 1993-03-17 |
US4769556A (en) | 1988-09-06 |
DE3643260A1 (de) | 1988-07-07 |
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