JPH07103992B2 - Stove controller - Google Patents

Description

Description: [Industrial field of application] The present invention relates to a stove control having an overheat prevention function for automatically controlling heating based on the temperature of an object to be cooked detected by a temperature sensor. Regarding the device.

[Prior Art] In a cooking stove such as a gas table, in order to prevent the food to be cooked in the cooking container from burning or the cooking oil from being ignited, the cooking container (to be cooked) is brought into contact with the bottom of the cooking container. object)
There is a control device which is provided with a temperature sensor for detecting the temperature of 1) and automatically controls the heating by stopping or weakening the fuel supply to the burner when the detected temperature exceeds a predetermined temperature.

In this case, the temperature for preventing charring in the case of simmered food is about 130 ° C, but when frying, a temperature of about 180 ° C, which is higher than the temperature for preventing charring, is required. In this case, as the limit temperatures for automatically stopping the heating, for example, 130 ° C. and 230 ° C. are set respectively, and the user can select them by the selection switch.

In addition, when performing empty baking or stir-fry of the cooking container,
It is necessary to have a temperature higher than 230 ° C, which is the upper limit temperature when performing the above-mentioned fried food, at which time it is inconvenient if the heating is automatically weakened or stopped, so the heating does not weaken or stop automatically As described above, there is a device provided with a release switch for releasing (cancelling) the overheat prevention function.

[Problems to be Solved by the Invention] However, in the above-mentioned thing, once the overheat prevention function is once released by the release switch, it is easy to forget to release it unless the user is clearly aware of it. .

For this reason, if the user thinks that the overheat prevention function is working despite leaving the overheat prevention function and moves away from the stove, it is likely to cause a burning or a fire, which is dangerous.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stove control device that can reliably obtain a heating power as needed and is unlikely to be in a dangerous state such as burning failure such as burning or ignition.

[Means for Solving the Problems] The invention according to claim 1 is provided with a temperature sensor for detecting the temperature of an object to be cooked, which is heated by a stove,
In a stove controller equipped with an overheat prevention means for preventing overheating of the cooking target by reducing the heating amount of the stove based on the temperature detected by the temperature sensor, the operation of the overheat prevention means is operated. Overheat prevention release means to release,
An alarm means for notifying by sound that the operation of the overheat preventive means has been canceled by the overheat preventive canceling means, and the alarm means for notifying when the operation of the overheat preventive means is canceled. Technical means.

The invention according to claim 2 further comprises a temperature sensor for detecting the temperature of the cooking object heated by the stove, and the heating amount of the cooking stove is reduced based on the temperature detected by the temperature sensor. In a stove controller provided with an overheat prevention means for preventing overheating of an object, an overheat prevention releasing means for releasing the operation of the overheat prevention means by an operation, and an operation of the overheat prevention means by the overheat prevention releasing means are released. Or when the operation of the overheat prevention means is released and the temperature detected by the temperature sensor rises to a predetermined temperature, a timer that starts measuring a predetermined time, and when the timer finishes measuring the predetermined time, The technical means is provided with a heating stopping means for stopping the operation of the stove.

The invention according to claim 3 is provided with a temperature sensor for detecting the temperature of the cooked food heated by the stove, and the heating amount of the stove is reduced based on the temperature detected by the temperature sensor to cook the cooked food. In a stove control device provided with an overheat prevention means for preventing overheating of an object, an overheat prevention canceling means for canceling the operation of the overheat prevention means by an operation, and an operation of the overheat preventing means by at least the overheat prevention canceling means. User verification means for detecting the presence of a user in the vicinity of the stove when released, and a user by the user detection means when the operation of the overheat prevention means is released by the overheat prevention release means When the presence of the above is no longer detected, the release of the operation of the overheat prevention means by the overheat prevention release means is stopped to operate the overheat prevention means And technical means, further comprising a stage.

The invention according to claim 4 is provided with a temperature sensor for detecting a temperature of an object to be cooked heated by the stove, and the heating amount of the stove is reduced based on the temperature detected by the temperature sensor to cook the cooking object. In a stove controller provided with an overheat prevention means for preventing overheating of an object, an overheat prevention releasing means for releasing the operation of the overheat preventing means by an operation, and an operation of the overheat preventing means by at least the overheat prevention releasing means. User verification means for detecting the presence of a user in proximity to the stove when released, and when the operation of the overheat prevention means is released by the overheat prevention release means, by the user detection means The technical means comprises a heating stopping means for stopping the operation of the stove when the presence of the user is no longer detected.

[Operation] In the first invention, when the operation of the overheat prevention means is released by the overheat prevention release means, the necessary heating temperature can be obtained regardless of the temperature detected by the temperature sensor.

Further, while the operation of the overheat preventing means is released, the sound informs that the operation of the overheat preventing means is released.

Therefore, the user pays attention to the overheating by the sound, and when it is not necessary to release the operation of the overheating prevention means due to the end of cooking, etc., the user may return the operation of the overheating prevention means or stop the heating by the sound. Be prompted.

In the second aspect, when the operation of the overheat prevention unit is released by the overheat prevention release unit, the necessary overheat temperature can be obtained regardless of the temperature detected by the temperature sensor.

In addition, when the operation of the overheat prevention means is released, the timer operates in association therewith, and when the operation of the timer ends, the heating is stopped at the same time.

Therefore, even if the operation of the overheat prevention means is released, the heating is always stopped when the operation of the timer is finished, and thus it is possible to prevent overheating and ignition of the food to be cooked.

In the third aspect of the invention, when the operation of the overheat prevention means is released by the overheat prevention releasing means, the necessary overheat temperature can be obtained regardless of the temperature detected by the temperature sensor.

Further, even if the operation of the overheat prevention means is released, if the presence of the user is no longer detected by the user detection means,
Since the operation of the overheat prevention means is restored, even if you forget to deactivate the overheat prevention means or leave the vicinity of the hob without knowing it, if it overheats, it will be automatically detected by the temperature sensor. Heating stops.

Further, in the fourth aspect of the invention, even if the operation of the overheat prevention means is released, when the presence of the user is no longer detected by the user detection means, the heating is automatically stopped, so that the operation of the overheat prevention means is released. Even if you forget about it or leave the area near the stove without knowing it, you can prevent the cooked food from overheating and ignite, and you will not be in a dangerous condition.

[Effects of the Invention] In the first invention, while the operation of the overheat prevention means is released, a sound alerts that there is a risk of overheating, so that it is less likely to leave the stove easily. Even if the cooker is away from the stove, the fact that the heating is being performed is notified by the sound, so that the operation of stopping the heating is less likely to be neglected.

Therefore, more safety can be secured as compared with the conventional one.

In the second aspect, when the operation of the overheat prevention means by the temperature sensor is released, the safety function by the timer works instead.

Therefore, even if the operator accidentally moves away from the stove in a state where the operation of the overheat prevention means is released, the heating is stopped when the timer is stopped, so that it is safe.

In the third aspect of the invention, even if the operation of the overheat preventing means is released, the operation of the overheat preventing means is restored when the user leaves the vicinity of the stove.

Therefore, even if the operator accidentally moves away from the stove while the operation of the overheat prevention means is released, the heating is stopped based on the temperature detected by the temperature sensor, which is safe.

In the fourth aspect of the invention, when the user leaves the stove, heating is stopped, which is safe.

EXAMPLES Next, the present invention will be described based on examples.

FIG. 2 shows a gas table 1 equipped with a stove control device of the present invention. Two gas stoves 2 and 3 are provided on the upper surface of the gas table 1, and the gas table 1 on the front side of the gas table 1 is provided. On the front side, there is a grill opening / closing door 4a for loading and unloading food to and from a grill 4, which has an inner grill box inside the gas table 1, and a fire extinguisher for operating each gas stove 2, 3 and grill 4 respectively. An operation panel 20 for setting the operating states of the buttons 5, 6, 7 and the gas stoves 2, 3 and the grill 4 is provided.

Each gas stove 2 and 3 perform normal heating operation,
It has an overheat prevention function that stops combustion when the temperature of the food to be cooked rises above a certain temperature. Therefore, in the center of the gas burners 2a, 3a of each gas stove 2, a pot, etc. Is equipped with temperature sensors 2b and 3b with built-in thermistors for detecting the temperature of the cooking container, and based on the temperature detected by the temperature sensors 2b and 3b, the control circuit 30 described later stops the fuel supply to stop the heating. Safety control is performed to ensure safety.

Each of the temperature sensors 2b and 3b is pressed and supported by a spring (not shown) toward the upper side of the gas table 1, and the detection portion is elastically brought into close contact with the cooking container or the like.

Further, each temperature sensor 2b, 3b is provided with an elevating device (not shown), which rises in response to an ignition operation and falls in response to a fire extinguishing operation.

As shown in FIG. 3, the grill burner 4b, which is provided inside the stove burners 2a and 3a and the grill opening / closing door 4a and includes two burners arranged above and below the cooked food,
Fuel supply pipes 8a, 8b, 8c are provided so as to be branched from a gas pipe 8 connected to a fuel gas supply port (not shown).

In addition, each burner 2a, 3a, 4b is provided with ignition electrodes 2d, 3d, 4d for performing spark discharge for ignition, and thermocouples 2e, 3e, 4e for detecting electromotive force by sensing combustion heat. ing.

Each fuel supply pipe 8a, 8b, 8c, a valve mechanism 11, which is integrally configured to shut off the fuel gas and adjust the gas amount,
12 and 13 are provided respectively.

As the valve function part that constitutes each valve mechanism 11, 12, 13, the fuel control valve 11a, 12a, respectively from the downstream side toward the upstream side.
13a, main valves 11b, 12b, 13b, electromagnetic safety valves 11c, 12c, 13
There is c.

Each fuel control valve 11a, 12a, 13a has its valve opening changed by gas amount control levers 5a, 6a, 7a provided on the front surface of the gas table 1 to control the fuel supply amount to each burner.

The main valves 11b, 12b, 13b are opened and closed according to the operation of the fire extinguishing buttons 5, 6, 7 provided on the front of the gas table 1, and each time the fire extinguishing buttons 5, 6, 7 are pressed once. It has a so-called push-push type cam mechanism in which the open state and the closed state are alternately changed.

The electromagnetic safety valves 11c, 12c, 13c are the main valves 11b, 12b, 13b.
The fire extinguishing buttons 5, 6 are opened and closed in relation to the opening and closing action of the
When the ignition push operation of 7 is performed and the main valves 11b, 12b, 13b are changed from the closed state to the open state, the valve is opened, the push operation is released (stopped), and the fire extinguishing buttons 5, 6, 7 are released. Is maintained at the open position where the main valves 11b, 12b, 13b are held open by the cam mechanism, the output of the thermocouples 2e, 3e, 4e causes the current of a certain value or more to be output to the separately provided coil. The open state is maintained only when is energized, and when the current is small due to misfire, misfiring, etc., the state is closed and gas supply is stopped.

Regarding the electromagnetic safety valves 11c and 12c in the gas stoves 2 and 3, a current for forced opening is supplied as an initial current only in the initial stage of ignition regardless of the outputs of the thermocouples 2e and 3e.

In addition to the valve mechanisms 11, 12 and 13, the fire extinguishing buttons 5, 6 and 7 are also provided.
Ignition switches 11d, 12d, 13d are provided which close the contacts only while the ignition pushing operation is being performed.

In addition, for each point fire extinguishing button 5, 6, 7, each main valve 11
b, 12b, 13b are provided with signal switches 11e, 12e, 13e for detecting the valve opening position for detecting the valve opening position for keeping the valve open position.The signal switches 11e, 12e are electromagnetic safety valves.
It is also used as a switch for starting the energization of the initial current to 11c and 12c, and as a lift switch for driving the lifting device of the temperature sensors 2b and 3b.

In the gas table 1 having the above configuration, each burner is controlled by the control circuit 30 provided in the gas table 1.

The control circuit 30 is formed mainly of a microcomputer, and as shown in FIG. 4, each gas stove 2,
3 and the grill 4 are provided with functional units of a stove control unit 31, 32 and a grill control unit 33.

Since the stove control units 31 and 32 perform the same control, only the stove control unit 31 that controls the gas stove 2 will be described here.

When the ignition switch 11d linked to the fire extinguisher button 5 closes the contact, the stove control unit 31 causes a spark discharge at the ignition electrode 2d and starts combustion at the stove burner 2a.

Further, during the combustion of the stove burner 2a, the coil of the electromagnetic safety valve 11c is energized by the output from the thermocouple 2e to adsorb the valve element and maintain the open state. When the stove burner 2a misfires due to spilled food or the like and the output of the thermocouple 2e decreases, the electromagnetic safety valve 11c is closed as a misfire detection state and the supply of combustion gas is stopped.

Further, during combustion, overheat prevention control for monitoring the temperature of the food to be cooked based on the temperature detected by the temperature sensor 2b in the cooking container such as a pot and preventing overheating is also performed.

Therefore, when the signal switch 11e closes the contact in response to the ignition operation, the gad motor of the lifting device is driven to raise the temperature sensor 2b so as to contact the cooking container, and the signal switch 11e rises while the contact is closed. When the signal switch 11e opens the contact in response to the fire extinguishing operation, the temperature sensor 2b descends so as to move away from the cooking container.

In this case, the elevated position and the lowered position of the temperature sensor 2b are detected by the microcomputers provided corresponding to the respective positions, and the driving of the gad motor is stopped in response to the detection signal of each micro switch. (Not shown) Controls to prevent this overheating include low-cut operation to stop the fuel supply when the temperature of the food to be cooked is about 130 ° C or higher, and tempura to prevent the charring of cooked foods. Further limit the temperature to about 250 ℃ so that you can cook etc.
There are two types of high-cut operation that is raised up to.

In this embodiment, the changeover switch provided on the operation panel 20
Each time the operation is performed by 21b, the operation mode is switched. Corresponding to the switching of the operation mode, the green LED 22b and the red LED 23b provided in proximity to the fire extinguisher button 5 respectively provide the low cut operation mode and the high cut operation mode. The mode is displayed.

As for the gas stove 3, the operation panel 20 is similarly provided with a changeover switch 21c, a green LED 22, and a red LED 23c.

Here, in order to perform safer operation, the low cut operation mode with a low limit temperature is started at the start of use, and when the changeover switch 21b is pressed, the operation mode is changed to the high cut operation mode. When the temperature is detected, the electromagnetic safety valve 11c is de-energized and the fuel supply is stopped.

In this overheat prevention control, since the point fire extinguishing button 5 closes only the electromagnetic safety valve 11c while keeping the main valve 11b open, the overheat prevention control based on the temperature detection is performed. The buzzer 34 informs the user of this fact and prompts the user to close the main valve 11b by pressing the fire extinguisher button 5.

Furthermore, the stove control unit 31 cancels the overheat prevention control so that the overheat prevention control is not performed when the cooking container is fried or fried.

As described above, in this example, at the start of heating,
The low-cut operation mode is automatically selected, and then the high-cut operation mode can be selected as required.However, in this high-cut operation mode, the upper limit temperature is about 250 ° C, so if it is left as it is This is because something cannot be done, and the heating prevention control is released by operating the release switch 24a provided near the changeover switch 21b of the operation panel 20, and the release switch 24a is operated again in the released state. And it returns to the heating prevention control. There is also a release switch 24b for the stove 3.

In the first embodiment of the present invention, when the overheat prevention control is released, the buzzer 34 is driven to make a sound to notify that the overheat prevention control has been released, and the buzzer 34 is released from the overheat prevention control. The user is continuously driven in the meantime, and the user is continuously notified by sound that the overheat prevention control is released.

As a result, during cooking, it is possible to be aware that the overheat prevention control has been released, so that the user will not easily leave the gas table 1, and even if they leave, the buzzer 34 will still be heating the sound. As you can see, don't forget to stop heating.

While the overheat prevention control is released, the green LED 22b
And the red LED 23b are both turned off to indicate that neither the low cut operation mode nor the high cut operation mode is set.

Further, a lamp or the like that emits light only while the overheat prevention control is released may be separately provided.

Further, while the overheat prevention control is released, the temperature sensor 2b is driven to the lowered position by the lifting device and protected from heat so as not to be overheated by the stove burner 2a. .

Note that the method of releasing the overheat prevention control is to release (cancel) each cut operation mode by an electric circuit (microcomputer), or in the electric circuit, while one of the cut operation modes remains operating, the temperature sensor 2b , 3b may be lowered to disable detection of the temperature of the cooking container, thereby substantially canceling each cutting operation mode.

In the control of the grill 4 by the grill control unit 33, as in the case of the above-described stove burners 2a and 3a, ignition is performed when the ignition switch 13d closes the contacts of the grill burner 4b in response to the ignition pushing operation of the fire extinguisher button 7. While the signal switch 13e is in operation and the contact is closed, the thermocouple 4e performs safety control by detecting misfire, etc., while overheating is limited by the temperature detection, not by temperature detection. To ensure safety.

Therefore, the grill control unit 33 is provided with a timer unit 33a, and when the operation of the timer unit 33a is stopped, the electromagnetic safety valve 13c is automatically closed to stop the supply of fuel gas.

The timer unit 33a performs an ignition operation, starts operation when the ignition of the grill burner 4b is detected by the thermocouple 4e, and normally ends operation after 15 minutes have elapsed.

In addition, the timer unit 33a includes a timer setting key 24
It also has a time display section 25 that displays the operating time in two-digit Arabic numerals by 7 segments, and an arbitrary time can be set as the operating time within 15 minutes.

As described above, the timer unit 33a is set to 15 minutes when the operation starts, and if the timer setting key 24 is pressed thereafter, the set time becomes 1 minute, and then the timer setting key 24 is further pressed. Each time there is one, the setting time advances by 1 minute, and a maximum of 15 minutes can be set.

Here, when the signal switch 13e closes the contact, the seven segments of the time display section 25 are turned on and display is started. If the state remains as it is, it is displayed that 15 minutes is set.

As described above, in the timer section 33a, the set time is advanced by pressing the timer setting key 24.
The setting time can be extended at any time by the timer setting key 24 as long as a is operating. Therefore,
In particular, if the timer setting key 24 is not operated, the heating automatically ends in 15 minutes, whereas if the timer setting key 24 is operated before the end of the operation of the timer section 33a, the operating time can be easily increased. Since it can be extended, even if it takes a long time to cook, the grill burner 4b can be continuously used without extinguishing the fire, and cooking failures can be reduced.

In this case, the buzzer 34 is driven 30 seconds before the fire of the grill burner 4b is extinguished, and in order to notify that the heating by the grill burner 4b is about to end, the timer setting key 24 is operated by receiving the notification from the buzzer 34. Therefore, the usage time of the grill burner 4b can always be extended.

Further, even when the operating time is set by the timer setting key 24, the operating time can be extended in the same manner, so that heating can be continuously performed even when the preset time is not appropriate.

In the time display unit 25, the operating time of the timer unit 33a is 1
If the time is more than a minute, the time is displayed in minutes, and if it is less than 1 minute, the time is displayed in a second. If there is an operation to extend the operating time, the first operation takes 1 minute. Is set, and thereafter the operating time increases by the unit of minutes.

The ignition lamp 26 provided in the vicinity of the point fire extinguisher button 7,
Thermocouple 4e installed near the grill burner 4b
When the temperature detected by is higher than a predetermined temperature, it is turned on as an ignition detection state, and when the detected temperature is decreased, it is turned off as a misfire detection state.

In the grill controller 33, the main valve 13 by the fire extinguishing button 7
When the electromagnetic safety valve 13c is closed due to misfire detection or the like while the signal switch 13e is in the state where the contact is closed because the valve closing operation of b is not performed, the buzzer 34 notifies the user of the notification.

In addition, the buzzer 34 gives a notification when the operation of the timer section 33a ends, and after the operation ends, until the closing operation (extinguishing operation) of the main valve 13b by the fire extinguisher button 7 is performed,
The notification is repeated every one minute, and the user is prompted to close the main valve 13b.

The lock lever 9 provided on the front of the gas table 1
In order to prevent the juveniles from inadvertently performing the ignition operation, the fire extinguishing buttons 5, 6 and 7 are locked so that they cannot be pressed.

Next, the operation of the gas stove 2 in the gas table 1 of the present embodiment having the above configuration will be described with reference to FIG.

When the user performs an ignition operation with the fire extinguisher button 5,
As the main valve 11b is opened, the electromagnetic safety valve 11c is opened, and the fuel gas is supplied to the stove burner 2a.

At this time, the signal switch 11e and the ignition switch 11d close the contacts, and in the stove controller 31, the signal switch 11e
According to the closing operation of e, a current for forcibly maintaining the open state is supplied to the electromagnetic safety valve 11c for a fixed time (for example, 20 seconds), and overheat prevention control is started (step 1), In response to the closing operation of the ignition switch 11d, a spark discharge is generated at the ignition electrode 2d by a high voltage generating circuit (not shown).

In the stove burner 2a, the supplied fuel gas is ignited and ignited, thereby heating the thermocouple 2e.

When the user releases the pushing operation of the fire extinguisher button 5, the main valve 11b is maintained in the open state by the cam mechanism, and at this time, the electromagnetic safety valve 11c is energized by the forced current by the capacitor and is maintained in the open state. Fuel gas is continuously supplied to the stove burner 2a.

When the temperature of the thermocouple 2e rises sufficiently, the ignition detection state is set based on the output of the thermocouple 2e, and the electromagnetic safety valve 11c is continuously adsorbed and maintained in the open state.

In the overheat prevention control, first, the low-cut operation mode is started, and the green LED 22b indicating the low-cut operation mode is turned on.

After that, when the user operates the changeover switch 21b as necessary, the low cut operation mode is changed to the high cut operation mode, the green LED 22b is turned off and the red LED 23b is turned on instead.

Further, if necessary, if the release switch 24a is operated (YES in step 2), the overheat prevention control is released (step 3), the low cut operation mode and the high cut operation mode are removed, and the temperature sensor 2b is driven to the lowered position. Thus, the heating is performed without limitation regardless of the temperature detected by the temperature sensor 2b.

At this time, the fact that the buzzer 34 has released the overheat prevention control is notified by a continuous sound or an intermittent sound (step 4).

Therefore, it is rare that the operator forgets to cancel the overheat prevention control and leaves the gas table 1 by mistake.

Further, even when the gas stove 2 is separated from the gas table 1, the buzzer 34 continuously notifies the gas stove 2, so that the gas stove 2 is not left as it is in a heated state.

When the overheat prevention control is released, the release switch
If 24a is not operated (N in step 5)
O), Step 3 and subsequent steps are repeated, and the buzzer 34 continues to notify while the overheat prevention control is released.

Release switch 24 when the overheat prevention control is released
When a is operated (YES in step 5), the process proceeds to step 1 and the overheat prevention control is again performed based on the temperature detected by the temperature sensor 2b, and the low cut operation mode or the high cut operation mode selected by the changeover switch 21b is executed. Be seen.

When the user performs a fire extinguishing operation using the point fire extinguishing button 2, the main valve 11b is closed to extinguish the fire, the signal switch 11e opens the contact, and the overheat prevention control is turned off.

The electromagnetic safety valve 11c closes after waiting for the output of the thermocouple 2e to drop.

As described above, in the present embodiment, since the overheat prevention control can be released by the release switch, the necessary heating power can be easily obtained, and the buzzer notifies that the overheat prevention control is released, It can be used safely because attention can be paid to prevent overheating.

In the present embodiment, the buzzer is used to notify that the overheat prevention control has been cancelled, but it may be notified using a chime, a synthesized sound effect, or a voice.

Further, it may be notified by light from a lamp or the like.

Next, a second embodiment of the present invention will be described.

In the second embodiment, as shown in FIG. 5, each stove controller
31 and 32 are provided with safety timers 31a and 32a, which start operation when the overheat prevention control is released by the release switch and measure a predetermined time T1.
When the operation of a and 32a is completed, the electromagnetic safety valve 11
Energize the thermocouples 2e and 3e to c and 12c, respectively.

As a result, in the case where the overheat prevention control is released, when the predetermined time T1 elapses from the release, the supply of the fuel gas to the stove burners 2a, 3a is stopped regardless of the temperature detected by the temperature sensors 2b, 3b, Combustion stops automatically.

Here, the operating time of the safety timers 31a and 32a is set to, for example, 5 to 10 minutes, depending on the heating capacity of the stove burners 2a and 3a.

The operation of the gas stove 2 in the second embodiment will be described below with reference to FIG.

When the user performs an ignition operation with the fire extinguisher button 5,
Similar to the first embodiment, the ignition operation is performed in a predetermined sequence to start the combustion of the stove burner 2a, and the overheat prevention control is started (step 11).

After that, when the release switch 24a is operated as necessary (YES in step 12), the overheat prevention control is released (step 13).

Further, following this, the safety timer 31a starts counting the predetermined time T1 (step 14).

Thereafter, it is determined whether or not the predetermined time T1 has elapsed, and if the predetermined time T1 has not elapsed (in step 15,
NO), it is determined whether or not the release switch 24a is operated while the overheat prevention control is released. If the release switch 24a is not operated (NO in step 16), the step
When the release switch 24a is operated (YES in step 16) by repeating 15 and subsequent steps, the process proceeds to step 11 and the overheat prevention control is performed again.

When the predetermined time T1 has elapsed (YE
S), the energization from the thermocouple 2e to the electromagnetic safety valve 11c is stopped, and the fuel supply to the stove burner 2a is stopped,
Stop combustion (step 17).

Therefore, it is safe even if you accidentally forget to cancel the overheat prevention control.

Next, as a modification of the second embodiment, for example, as shown by the alternate long and short dash line in FIG. 6, after step 13, the temperature detected by the temperature sensor 2b reaches 250 ° C. as the upper limit temperature in the high cut operation mode. If it is determined that the temperature has not reached 250 ° C (step 20) (NO in step 20), the safety timer 31a does not start and waits until 250 ° C is reached and reaches 250 ° C. At times, the process proceeds to step 14 to start the operation of the safety timer 31a.

In this case, it is necessary to shorten the operating time of the safety timer 31a as compared with the above predetermined time T1 (5 to 10 minutes),
For example, the operating time T2 is set to 3 minutes.

Further, in this case, since it is necessary to detect the temperature by the temperature sensor 2b, it is not necessary to lower the temperature sensor 2b to the lowered position, and therefore, the lifting device for the temperature sensor 2b may be omitted.

Next, a third embodiment of the present invention will be described with reference to FIG.

In the third embodiment, the cut operation modes in the control circuit 30 are not released as the release operation of the overheat prevention control in step 31, but the release operation is performed by lowering the temperature sensor 2b as an external process.

Then, in step 15, when the predetermined time T1 is measured by the safety timer 31a (in step 15,
YES), the temperature sensor 2b is raised (step 32) to return to the overheat prevention control (step 11).

In this case, if the temperature sensor 2b detects the limit temperature in each cut operation mode after the recovery, the electromagnetic safety valve 11c is deenergized to stop combustion as the overheat prevention control, which is safe.

When returning, cooking can be continued if the limit temperature in each cut operation mode is not detected.

In this embodiment, if the release switch 24a is operated while the overheat prevention control is released, the temperature sensor 2
b rises (step 32) and the overheat prevention control returns (step 11).

In addition, in these embodiments, the notification by the buzzer 34 in the first embodiment is basically not shown, but the notification by the buzzer 34 may be combined.

Next, a fourth embodiment of the present invention will be described.

In the fourth embodiment, as shown in FIG. 8, each stove controller
An infrared sensor 35 for transmitting a signal to 31 and 32 is provided, and this infrared sensor 35 is incorporated in the operation panel 20 of the gas table 1 as shown in FIG. It is determined whether or not there is a user in front of or in the vicinity of the gas table 1 shown, and the release of the overheat prevention control is continued only when the user is detected near the gas table 1, and the user When it is no longer detected near the table 1, the overheat prevention control is restored.

In this case, even if the user is mostly near the gas table 1, the user may temporarily leave the gas table 1 due to an operation such as bringing a seasoning or the like to the user. When the detection is no longer detected, the overheat prevention control does not always return, but a fixed time t (for example, 1 minute) is counted in order to return only when the user has not been detected for a certain period of time. Timer 31b, 3
2b is provided to improve usability.

The operation of the gas stove 2 in the fourth embodiment will be described below with reference to FIG.

When the user performs an ignition operation with the fire extinguisher button 5,
Similar to the first embodiment, the ignition operation is performed in a predetermined sequence to start the combustion of the stove burner 2a, and the overheat prevention control is started (step 21).

After that, when the release switch 24a is operated as necessary (YES in step 22), it is determined whether or not the user is detected in the vicinity of the gas table 1 by the infrared sensor 35, and a person is detected. (YES in step 23), the overheat prevention control is released (step 24),
If no person is detected (NO in step 23), the process proceeds to step 21, and overheat prevention control is continued.

After that, it is continuously determined whether or not the person is detected, and when the person is detected (in step 25,
YES), it is determined whether or not the release switch 24a is operated. If the release switch 24a is not operated (NO in step 26), the process proceeds to step 24 and the release state of the overheat prevention control is continued, and the release switch 24a When is operated (YES in step 26), the process proceeds to step 21, and the overheat prevention control is performed again.

On the other hand, in step 25, when no person is detected (NO), the timer 31b starts counting time (step 2
7) Then, it is judged whether or not the time during which no person is detected has reached a certain time t (step 28).

Here, when a person is not detected even after 1 minute has passed (YES in step 28), the process proceeds to step 21, and the overheat prevention control is automatically restored.

Therefore, even if the operator forgets to release the overheat prevention control and leaves the gas table 1, the overheat prevention control is automatically restored, which is safe.

Also, until 1 minute elapses (in Step 28, N
O), the detection of the person in step 25 is determined, and if the person is detected again during that time, the timer 31b is stopped,
Since the state where the overheat prevention control after step 24 is released continues, it is easy to use.

Next, a fifth embodiment will be described with reference to FIG.

In the fifth embodiment, similarly to the fourth embodiment, the infrared sensor 35 determines whether or not a person is detected near the gas table 1. As a result of the determination, if the person is not detected (NO in step 23). ), The electromagnetic safety valve 11c is closed and heating is stopped (step 35).

Further, even if a person is detected and the overheat prevention control is released at the time when the release switch 24a is operated (step 24), but if the person is no longer detected (NO in step 25), the fourth Similar to the embodiment, the timer 31b is activated to start timing (step 27), and when the person is not detected again after the elapse of the fixed time t (YES in step 28), the electromagnetic safety valve 11c is forced to operate. Closed (step
35), stop heating.

The infrared sensor 35 may be attached to a wall other than the gas table 1 such as a kitchen wall.

Further, in the above embodiment, the infrared sensor is used as the user detecting means, but a weight sensor and a pressure sensor may be incorporated in the kitchen mat to detect the presence of a person by detecting the weight of the person.

In the above embodiments, the release switch for releasing the overheat prevention control is provided, but as a method of releasing the overheat prevention control, the cooking container is conditioned by changing the detected temperature of the temperature sensor to a dry state or It may be possible to automatically determine that it is a stir-fried food, and release the overheat prevention control based on the determination result.

Although the temperature sensor is shown as being in contact with the cooking container, an infrared non-contact temperature sensor may be used or the temperature sensor may be put in the cooking container.

Further, the overheat prevention function of controlling heating based on the temperature detected by the temperature sensor is not limited to the one that stops heating, but may be one that weakens the heating power.

In the above embodiments, the stove in the gas table is shown, but the stove in the electric range may be used.

[Brief description of drawings]

FIG. 1 is a flow chart for explaining the first embodiment of the stove control unit in the gas table showing the embodiment of the present invention, and FIG.
FIG. 3 is a perspective view showing a gas table of this embodiment, FIG. 3 is a gas circuit diagram showing a gas circuit in the gas table of this embodiment, and FIG. 4 is a view for explaining the function of the first embodiment of the control circuit. Fig. 5 is a functional block diagram, Fig. 5 is a functional block diagram for explaining the functions of the second and third embodiments of the control circuit, and Fig. 6 is a flow chart for explaining the second embodiment of the stove control unit.
FIG. 8 is a flow chart for explaining the third embodiment of the stove control unit, FIG. 8 is a functional block diagram for explaining the functions of the fourth and fifth embodiments of the control circuit, and FIG. 9 is the present invention. The top view of the gas table for explaining the characteristics of the infrared sensor in the fourth and fifth embodiments, FIG. 10 is a flow chart for explaining the fourth embodiment of the stove control unit, and FIG. 11 is for the stove control unit. Fifth
It is a flow chart for explaining an example. In the figure, 2, 3 ... gas stove, 2b, 3b ... temperature sensor, 24a, 24b ... release switch (overheat prevention release means), 31, 32 ... stove control part (stove) Control device, overheat prevention means, heating stop means, overheat prevention return means), 31
a, 32a …… Safety timer (timer), 34 …… Buzzer (informing means), 35 …… Infrared sensor (user detection means).

Claims (4)

[Claims] 1. A temperature sensor for detecting the temperature of an object to be cooked by a stove, wherein the heating amount of the stove is reduced based on the temperature detected by the temperature sensor. In a stove controller provided with overheat prevention means for preventing overheating, an overheat prevention canceling means for canceling the operation of the overheat prevention means by an operation, and an operation for the overheat preventing means being canceled by the overheat prevention canceling means. A control device for a stove, which is provided with a notification means for notifying that there is a sound, the notification means performing a notification when the operation of the overheat prevention means is released. 2. A temperature sensor for detecting the temperature of an object to be cooked by a stove, wherein the heating amount of the stove is reduced based on the temperature detected by the temperature sensor. In a stove control device equipped with overheat prevention means for preventing overheat, an overheat prevention releasing means for releasing the operation of the overheat prevention means by an operation, and an operation of the overheat preventing means by the overheat prevention releasing means is released. When or when the operation of the overheat prevention means is released and the temperature detected by the temperature sensor rises to a predetermined temperature, a timer that starts measuring a predetermined time; and when the timer finishes measuring the predetermined time, A stove control device comprising a heating stopping means for stopping the operation of the stove. 3. A temperature sensor for detecting the temperature of an object to be cooked by a stove, wherein the heating amount of the stove is reduced based on the temperature detected by the temperature sensor. In a stove controller provided with overheat prevention means for preventing overheating, an overheat prevention releasing means for releasing the operation of the overheat prevention means by an operation, and an operation for the overheat prevention means being released by at least the overheat prevention releasing means. User detection means for detecting the presence of a user in the vicinity of the stove, and the presence of a user by the user detection means when the operation of the overheat prevention means is canceled by the overheat prevention releasing means. And when the temperature is no longer detected, the overheat prevention resetting means stops the release of the operation of the overheat prevention means by the overheat prevention releasing means and operates the overheat prevention means. The control device of the stove characterized by comprising. 4. A temperature sensor for detecting the temperature of an object to be cooked by a stove, wherein the heating amount of the stove is reduced based on the temperature detected by the temperature sensor. In a stove controller provided with overheat prevention means for preventing overheating, an overheat prevention releasing means for releasing the operation of the overheat prevention means by an operation, and an operation for the overheat prevention means being released by at least the overheat prevention releasing means. The user detection means for detecting the presence of the user in the vicinity of the stove and the operation by the user detection means when the operation of the overheat prevention means is released by the overheat prevention release means. And a heating stop means for stopping the operation of the stove when the existence of the stove is no longer detected.