EP2709421A1 - Security system for electric cookers - Google Patents

Abstract

The system has a control button (11) for controlling a heating plate (12) of an electric cooker and switching-off power supply to the plate if current interruption preset by a manufacturer during a cooking process exceeds a critical time. A cooking time countdown is continued with renewed power supply before an end of the critical time independent of the interruption. A control unit (13) is configured such that a cooking time preset by the manufacturer is not altered by a user. An acoustic signal sounds, and a warning lamp illuminates if the control unit interrupts a current to the plate. An independent claim is also included for an electric cooker.

Description

TECHNICAL PART

The present invention relates to the control unit for electric stoves, which interrupts the power supply of the respective heating plate after a preset time that can not be changed by the user when the users accidentally leave the electric stoves switched on.

EXISTING TECHNOLOGY

Security systems for the electric stoves to prevent possible fire and domestic accidents are presented when users accidentally leave the electric stoves switched on.

The in the application no. GB2267751 specified grill has heating halogen lamps and function switch. A microcomputer automatically turns off the halogen bulbs at a preset time, eg, one hour after the last press on the switch, in other words, this microcomputer has an auto power off function. An acoustic signal and a warning lamp will automatically switch off the halogen lamps one minute before the automatic switch-off. Alternatively, it can be ensured that an indicator lamp flashes.

Furthermore, the application no. US6140620 a device that interrupts the connection of electrical appliances or electrical components to a power source. It includes a circuit required to connect a device or component to the power supply through a relay, or another component required to transform the circuit into an open circuit. The circuit of the timer includes a processor for adjustment and a switch that communicates with the processor and is manually operated. The circuit of the timer is activated for a preset time when the switch is closed and the relay is switched off when the circuit of the timer is active. If the switch is turned off again while the timer circuit is active, there will be an extra time for the activation period.

BRIEF DESCRIPTION OF THE INVENTION

The main object of the invention is to present a control system and a control unit for the execution of this system, in order to avoid possible fire hazards and energy losses, which could be caused by power failures of the electric stoves.

• Abschaltung der Stromversorgung zur Heizplatte, wenn die Stromunterbrechung beim Kochvorgang die vom Hersteller voreingestellte kritische Zeit überschreitet.
• Fortsetzung der Kochzeit-Rückzählung unabhängig von der Stromunterbrechung bei einer erneuten Stromversorgung vor Ende der kritischen Zeit. Auf diese Weise wird in den Fällen, bei denen die Stromunterbrechung die kritische Zeit überschreitet, die Stromversorgung zur Heizplatte abgeschaltet und somit die Sicherheit gewährleistet. In den Fällen, bei denen die Stromunterbrechung die kritische Zeit nicht überschreitet, wird die Fortsetzung des normalen Kochvorgangs gewährleistet.

The invention is a control system which controls the hotplate of an electric cooker equipped with a housing, at least one hot plate and a hotplate control knob and counts down the cooking time to zero during the cooking process, starting from the manufacturer's preset time and then supplying the power to Switch off heating plate. Thus, this control system provides:

• Disconnection of the power supply to the hotplate when the power interruption during cooking exceeds the manufacturer's preset critical time.
• Resume cooking time count regardless of the power interruption when power is restored before critical time ends. In this way, in cases where the power interruption exceeds the critical time, the power supply to the heating plate is turned off, thus ensuring safety. In cases where the current interruption does not exceed the critical time, the continuation of the normal cooking process is ensured.

• die Kochzeit zurücksetzen, wenn die Einstellung des Kontrollknopfes zwischen "1-9" während des Kochvorgangs geändert wird und dabei der Kontrollknopf länger als 1 Sekunde auf "0"-Position (Aus) bleibt und dann wieder zwischen "1-9" eingestellt wird.
• die Kochzeit ohne Reset fortsetzen, wenn die Einstellung des Kontrollknopfes zwischen "1-9" während des Kochvorgangs geändert wird und dabei der Kontrollknopf weniger als 1 Sekunde auf "0"-Position (Aus) bleibt und dann wieder zwischen "1-9" eingestellt wird. Auf diese Weise wird verständlich, ob die Änderung der Einstellung des Kontrollknopfes eine Änderung des Kochvorgangs oder eine Ausschaltung bedeutet, indem sie auf "0" eingestellt wird.

In a preferred embodiment of the invention, the control system

• reset the cooking time if the setting of the control knob is changed between "1-9" during cooking, leaving the control knob in the "0" position (off) for more than 1 second and then setting it again between "1-9".
• Continue the cooking without reset if the setting of the control knob is changed between "1-9" during the cooking process, leaving the control knob in the "0" position (off) for less than 1 second, and then set again between "1-9" becomes. In this way, it can be understood whether the change of the setting of the control knob means a change of the cooking operation or a turn-off by being set to "0".

In a further preferred embodiment of the invention, an acoustic signal sounds and at the same time a warning lamp lights up when the control unit interrupts the current to the heating plate. In this way, the user is signaled that the cooking process has ended.

In another preferred embodiment of the invention, the control unit is configured to control a plurality of hot plates on the oven without interfering with each other. In this way, the same safety system is guaranteed for each individual hotplate when cooked simultaneously on several hotplates.

In another preferred embodiment of the invention, the control unit is configured so that the manufacturer's preset cooking time can not be changed by the user. This prevents the user from extending the cooking time and disabling the security system.

The invention is a control unit which controls the hotplate of an electric range equipped with a casing, at least one hot plate and a hotplate control knob, and counts down the cooking time to zero during the cooking process, starting from the manufacturer's preset time, and then powering down Switch off heating plate. Thus, it is configured to turn off the power to the hot plate when the power interruption in the cooking process exceeds the manufacturer's preset critical time and the cooking time count-back on a power supply continues before the end of the critical time regardless of the power interruption.

In another preferred embodiment of the invention, the control unit is configured to reset the cooking time if the setting of the control knob is changed between "1-9" during the cooking operation and the control knob is set to "0" position for more than 1 second (FIG. Off) and then again between "1-9" is set.

In a further preferred embodiment of the invention, the control unit is configured to continue the cooking time without reset if the setting of the control knob is changed between "1-9" during cooking and the control knob is set to "0" less than 1 second. Position (off) remains and then again between "1-9" is adjusted.

In a preferred embodiment of the invention, an acoustic signal sounds and at the same time a warning lamp lights up when the control unit interrupts the power to the heating plate.

In another preferred embodiment of the invention, the control unit is configured to control a plurality of hot plates on the oven without interfering with each other.

In another preferred embodiment of the invention, the control unit is configured so that the manufacturer's preset cooking time can not be changed by the user.

BRIEF DESCRIPTION OF THE FIGURES

illustration 1 provides an overview of the electric range with a control unit, which is the subject of the invention.

Figure 2 represents the connection of the control unit, which is the subject of the invention, with the heating plates.

Figure 3 FIG. 3 illustrates the flow chart of the control unit which is the subject of the invention.

DETAILED DESCRIPTION OF THE INVENTION

In this detailed description, the control unit (13) and the control system for the electric ranges, which are the subject of the invention, are explained in more detail with examples only for better understanding and without limiting effects.

As in illustration 1 represented, the control unit (13), which is the subject of the invention, with the housing (10) with at least one control knob (11) and at least one with the control knob (11) connected to the heating plate in connection. The control unit (13) is activated when the position of the control knob (11) is set from "0" (OFF) to between "1" (lowest cooking level) and "9" (highest cooking level). Thereafter, the recalculation of the cooking time, which is preset by the manufacturer, begins. When the cooking time count-back is finished, the control unit (13) turns off the power supply to the hot plate (12). The control unit (13) operates during power failures and the position changes of the control knob (11) during the count-in as follows.

• Erster Schritt (1): In diesem Schritt aktiviert der Kontrollknopf (11) die Kontrolleinheit (13). Zweiter Schritt (2): In diesem Schritt beginnt die Rückzählung der Kochzeit.
• Dritter Schritt (3): In diesem Schritt werden die Positionsänderungen des Kontrollknopfes (11) überwacht.
• Vierter Schritt (4): In diesem Schritt werden die Stromausfälle während des Kochvorgangs überwacht.
• Fünfter Schritt (5): In diesem Schritt dauert die Rückzählung der Kochzeit.
• Sechster Schritt (6): In diesem Schritt wird überwacht, ob die Position des Kontrollknopfes (11) geändert wird, bis die Rückzählung der Kochzeit beendet ist.
• Siebter Schritt (7): In diesem Schritt wird die Stromversorgung zur Heizplatte (12) unterbrochen.
• Achter Schritt (8): In diesem Schritt ertönt ein akustisches Signal und es leuchtet zugleich eine Warnlampe.

As in the flowchart in Figure 3 the operations of the control unit (13) can be briefly explained as follows:

• First step (1): In this step, the control button (11) activates the control unit (13). Second step (2): In this step, the re-counting of the cooking time begins.
• Third step (3): In this step, the position changes of the control knob (11) are monitored.
• Fourth step (4): In this step, the power failures during the cooking process are monitored.
• Fifth step (5): In this step, the recalculation of the cooking time lasts.
• Sixth Step (6): In this step, it is monitored whether the position of the control button (11) is changed until the count-back of the cooking time is completed.
• Seventh step (7): In this step, the power supply to the heating plate (12) is interrupted.
• Eighth step (8): In this step, an acoustic signal sounds and at the same time a warning light illuminates.

1. 1. Schritt (1): Die Kontrolleinheit (13) wird aktiviert, wenn die Position des Kontrollknopfes (11) des Elektroherdes von "0" (Aus) auf zwischen "1" (niedrigste Kochstufe) und "9" (höchste Kochstufe) eingestellt wird.
2. 2. Schritt (2): Die aktivierte Kontrolleinheit (13) beginnt mit der Rückzählung der vom Hersteller voreingestellten und durch den Benutzer nicht zu ändernden Kochzeit.
3. 3. Schritt (3): In der ersten Stufe (3a) des dritten Schrittes wird überwacht, ob die Einstellung des Kontrollknopfes (11) während des Kochvorgangs geändert wurde. Es wird zum Schritt 4 (4) übergegangen, wenn die Einstellung des Kontrollknopfes (11) nicht geändert wurde oder wenn der Kontrollknopf (11) während der Positionsänderung nicht auf die Position "0" gesetzt wurde. Wenn der Kontrollknopf (11) während der Positionsänderung auf die Position "0" gesetzt wurde, wird zu der zweiten Stufe (3b) übergegangen und kontrolliert, ob der Kontrollknopf (11) länger als 1 Sekunde auf Position "0" war. Es wird zum Schritt 4 (4) übergegangen, wenn der Kontrollknopf (11) nicht länger als 1 Sekunde auf Position "0" war. Es wird zu der dritten Stufe (3c) übergegangen, wenn der Kontrollknopf (11) länger als 1 Sekunde auf Position "0" war. Der Kochzeitzähler wird zurückgesetzt und es wird zum Schritt 1 (1) zurückgegangen. Der Grund der Sekundenkontrolle in der zweiten Stufe (3b) ist, zu verhindern, dass der Zähler zurückgesetzt wird und erneut zu zählen beginnt, wenn der Kontrollknopf (11) von der Position "9" über die Position "0" auf Position "1" eingestellt wird. Auf diese Weise wird gewährleistet, dass der Kochzeitzähler ohne Reset weiter zählt, wenn der Kontrollknopf (11) weniger als 1 Sekunde auf Position "0" bleibt.
4. 4. Schritt (4): In der ersten Stufe (4a) des vierten Schrittes wird überwacht, ob der Netzstrom während des Kochvorgangs ausfällt. Es wird zum Schritt 5 übergegangen, wenn der Strom nicht ausfällt. Wenn der Strom ausfällt, wird zu der zweiten Stufe (4b) übergegangen und die Dauer des Ausfalls überwacht. In der dritten Stufe (4c) wird überwacht, ob der Strom innerhalb von dem voreingestellten kritischen Zeitraum wieder hergestellt ist. Es wird zum Schritt 5 übergegangen, wenn der Strom wieder hergestellt ist. Es wird zum Schritt 7 übergegangen, wenn der Strom innerhalb von dem kritischen Zeitraum nicht wieder hergestellt ist und der Elektroherd wird abgeschaltet, um zu verhindern, dass er sich wieder einschaltet, wenn der Strom wieder hergestellt ist.
5. 5. Schritt (5): In Schritt 5 setzt der Zähler die Kochzeitrückzählung fort, wenn davor keine Stromunterbrechung aufgetreten ist. Auch wenn eine Stromunterbrechung aufgetreten ist, setzt das System unabhängig von der Stromunterbrechung die Kochzeitrückzählung fort. Die Rückzählung geht auch weiter, wenn der Strom wieder hergestellt ist.
6. 6. Schritt (6): In Schritt 6 wird überwacht, ob die Position des Kontrollknopfes (11) geändert wird, bis die Rückzählung beendet ist. Wird die Position geändert, bevor die Rückzählung beendet ist, wird zum Schritt 3 (3) zurückgegangen, um diese Änderung zu prüfen und anschließend werden die nächsten Schritte wiederholt. Es wird zum Schritt 7 (7) übergegangen, wenn die Position nicht geändert wird, bis die Rückzählung beendet ist.
7. 7. Schritt (7): In Schritt 7 wird die Stromversorgung zur Heizplatte unterbrochen und dadurch die Heizplatte ausgeschaltet, weil die Zeit abgelaufen ist oder der Strom in der voreingestellten Zeit nicht hergestellt ist.
8. 8. Schritt (8): In Schritt 8 ertönt ein akustisches Signal und/oder es leuchtet eine Warnlampe, um die Unterbrechung der Stromversorgung zu signalisieren.

The more detailed operations of the control unit (13) can be explained as follows:

1. 1st step (1): The control unit (13) is activated when the position of the control button (11) of the electric range is set from "0" (OFF) to between "1" (lowest cooking level) and "9" (highest cooking level) becomes.
2. 2nd step (2): The activated control unit (13) starts to count back the cooking time preset by the manufacturer and not to be changed by the user.
3. Step 3 (3): In the first stage (3a) of the third step, it is monitored whether the setting of the control knob (11) has been changed during the cooking process. It goes to step 4 (4), if the setting of the control knob (11) has not been changed or if the control knob (11) was not set to the position "0" during the position change. If the control knob (11) has been set to the position "0" during the position change, it is transferred to the second stage (3b) and checked whether the control knob (11) has been at "0" for more than 1 second. It will proceed to step 4 (4) if the control knob (11) has not been in position "0" for more than 1 second. It will proceed to the third stage (3c) when the control knob (11) has been in position "0" for more than 1 second. The cooking time counter is reset and it becomes the step 1 (1) decreased. The reason for the second check in the second stage (3b) is to prevent the counter from being reset and counting again when the control knob (11) moves from the position "9" to the position "0" to the position "1". is set. In this way it is ensured that the cooking time counter continues to count without reset if the control button (11) remains in position "0" for less than 1 second.
4. Step 4 (4): In the first stage (4a) of the fourth step, it is monitored whether the mains current fails during the cooking process. It goes to step 5, if the power does not fail. If the power fails, the second stage (4b) is transitioned and the duration of the failure monitored. In the third stage (4c), it is monitored whether the current is restored within the preset critical time period. It is transferred to step 5, when the power is restored. It will proceed to step 7 if the power is not restored within the critical time period and the electric range is turned off to prevent it from turning on again when the power is restored.
5. Step 5 (5): In step 5, the counter continues cooking time count if no power interruption has occurred before. Even if a power interruption has occurred, the system resumes cooking time count regardless of the power interruption. The count continues even when the power is restored.
6. Step 6 (6): In step 6, it is monitored whether the position of the control button (11) is changed until the count back is completed. If the position is changed before the count back is completed, step 3 (3) is returned to check this change, and then the next steps are repeated. It proceeds to step 7 (7) if the position is not changed until the count back is completed.
7. Step 7 (7): In step 7, the power supply to the hot plate is interrupted, thereby turning off the hot plate because the time has elapsed or the current is not established in the preset time.
8. Step 8 (8): In step 8, an audible signal sounds and / or a warning light illuminates to signal the interruption of the power supply.

As in Figure 2 shown, the processes of several hotplates on the electric stove are controlled independently of each other by a control unit.

The safety of the invention is further explained in the appended claims and must by no means be limited to this detailed description with examples for a better understanding. For it is obvious that a person skilled in the art can develop similar structures based on the above explanations, maintaining the core theme of the invention.

reference numbers

1

First step

2

Second step

3

Third step

3a

First stage

3b

Second step

3c

Third step

4

fourth step

4a

First stage

4b

Second step

4c

Third step

5

Fifth step

6

Sixth step

7

Seventh step

8th

Eighth step

10

casing

11

control knob

12

heating plate

13

control unit

Claims (11)

Control system which controls the heating plate (12) of an electric range equipped with a housing (10), at least one heating plate (12) on said housing (10) and a control button (11) for the heating plate (12), and the cooking time counting back to zero during the cooking process, starting from the time preset by the manufacturer and then switching off the power supply to the heating plate (12), characterized in that - the power supply to the heating plate (12) is turned off when the power interruption during cooking exceeds the factory preset by the manufacturer critical time. - the cooking time re-counting is continued regardless of the power interruption in a new power supply before the end of the critical time. Control system according to claim 1, characterized in that - a control unit (13) resets the cooking time if the setting of the control knob (11) is changed during the cooking operation in which the position of the control knob (11) is "1-9" and the control knob (11) is longer than Remains at "0" position (off) for 1 second, and then returns to "1-9". - a control unit (13) continues the cooking time without reset if the setting of the control knob (11) is changed during the cooking operation, in which the position of the control knob (11) is "1-9" and the control knob (11) remains at "0" position (Off) for less than 1 second, and then again is set between "1-9". Control system according to claim 2, characterized in that an acoustic signal sounds and at the same time a warning lamp lights up when the control unit (13) interrupts the power to the heating plate (12). A control system according to claim 2 or 3, characterized in that the control unit (13) is configured to control a plurality of hot plates (12) on the hearth without interfering with each other. Control system according to one of claims 2-4, characterized in that the control unit (13) is configured so that the manufacturer preset cooking time can not be changed by the user. Electric stove with a housing (10), at least one heating plate (12) on this housing (10), at least one control button (11) for the heating plate (12) and a control unit (13) controlling the heating plate (12) and the cooking time counting back to zero during the cooking process, starting from the manufacturer's preset time, and then shutting off the power supply to the heating plate (12), characterized in that the control unit (13) is configured to shut off the power supply to the heating plate when the power is interrupted during cooking exceeds the manufacturer's preset critical time and cooking time count-back on a power supply will continue before the critical time expires, regardless of the power interruption. Electric cooker according to claim 6, characterized in that the control unit (13) is configured to reset the cooking time when the setting of the control knob (11) during the cooking operation in which the position of the control knob (11) is set to "1-9 "is changed and the control knob (11) remains in the" 0 "position (OFF) for more than 1 second and then is set again between" 1-9 ". Electric cooker according to claim 6 or 7, characterized in that it is configured so that the cooking time continues without reset, if the setting of the control knob (11) during the cooking process, in which the position of the control knob (11) on "1-9 "is changed and the control knob (11) remains at" 0 "(off) position for less than 1 second, and is then set again between" 1-9 ". Electric cooker according to one of claims 6-8, characterized in that it contains a warning system in which an acoustic signal sounds and at the same time a Warning lamp lights when the control unit (13) cuts off the power to the heating plate (12). Electric cooker according to one of claims 6-9, characterized in that the control unit (13) is configured to control a plurality of heating plates (12) on the hearth without interfering with each other. Electric cooker according to one of claims 6-10, characterized in that the control unit (13) is configured so that the manufacturer preset cooking time can not be changed by the user.

Images