JPH046318A - Control device for cooking stove - Google Patents

Abstract

PURPOSE:To prevent a failure in cooking such as a scorching or the like and prevent any dangerous state such as a fire ignition or the like by a method wherein a control device is provided with an informing means for informing a releasing of over-heating preventing function with sound by an over-heating prevention releasing means and then the informing means is operated when the over-heating prevention function is released. CONSTITUTION:When a user operates a releasing switch 24a as required, an over-heating preventive control is released and the operation does not become a low-cut operation mode or a high-cut operation mode. A temperature sensor 2b is driven to its descending position and a heating operation is carried out limitlessly without being related to a sensed temperature of a temperature sensor 2b. At this time, it is informed by a continuous sound or an intermittent sound with a buzzer 34 that the over-heating preventive control is released. Due to this arrangement, changes of the user's leaving the gas table after inadvertently forgetting that the over-heating preventive control has been released are decreased. Even in the case that the user happens to leave the gas table, a continuous informing is carried out by the buzzer 34.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to the control of a stove equipped with an overheating prevention function that automatically controls heating based on the temperature of the food detected by a temperature sensor. Regarding equipment.

[Prior Art] In a stove such as a gas stapler, in order to prevent the food in the cooking container from burning or cooking oil to ignite, the cooking container (to be cooked) comes into contact with the bottom of the cooking container. thing)
There is a control device that is provided with a temperature sensor that detects the temperature of the burner, and controls heating by automatically stopping or weakening the fuel supply to the burner when the detected temperature exceeds a predetermined temperature.

In this case, the temperature to prevent scorching when boiling food is about 130°C, but when frying food, a temperature of about 180°C, which is higher than the temperature to prevent scorching, is required. For example, the limit temperature for automatically stopping heating in each case is 130°C and 230°C.
There is a device that allows the user to select by using a selection switch.

Furthermore, when performing dry-frying or stir-frying in a cooking container,
A temperature higher than the upper limit temperature of 230℃ is required when frying the food mentioned above, and it is inconvenient if the heating automatically weakens or stops at that time, so the heating does not automatically weaken or stop. Some devices are equipped with a release switch to cancel (cancel) the overheating prevention function.

[Problem to be Solved by the Invention] However, in the above-mentioned device, once the overheating prevention function is canceled by the release switch, the user may forget that the overheating prevention function has been canceled unless the user is clearly aware of it. Easy to use.

Therefore, even though the overheating prevention function has been canceled, if you walk away from the stove thinking that the overheating prevention function is activated, it is likely to cause burning or ignition, which can be dangerous.

SUMMARY OF THE INVENTION An object of the present invention is to provide a control device for a stove that can reliably obtain heating power as required and that is less likely to cause cooking failures such as burning or dangerous situations such as ignition.

[Means for Solving the Problems] The present invention provides a stove that is equipped with a temperature sensor for detecting the temperature of an object to be cooked and has an overheat prevention function that controls heating based on the temperature detected by the temperature sensor. In the control device,
A first aspect of the present invention includes an overheating prevention canceling means for canceling the overheating prevention function, and a notifying means for notifying by sound that the overheating prevention function has been canceled by the overheating prevention canceling means, the notifying means The technical means is to notify when the overheating prevention function is canceled.

In the second invention, the technology includes an overheating prevention canceling means for canceling the overheating prevention function and a timer that operates in connection with canceling the overheating prevention function, and stops heating when the timer ends the operation. As a practical means.

In a third aspect of the present invention, the overheating prevention canceling means is provided to cancel the overheating prevention function, and the user detection means is configured to detect the presence of a user near the stove, and the overheating prevention function is activated by the overheating prevention canceling means. The technical means is to restore the overheating prevention function if the presence of the user is no longer detected by the user detection means when the overheating prevention function is released.

In a fourth aspect of the present invention, the overheat prevention canceling means is provided to cancel the overheating prevention function, and the user detection means is configured to detect the presence of a user near the stove, and the overheating prevention function is activated by the overheating prevention canceling means. The technical means is to stop the heating if the presence of the user is no longer detected by the user detection means when the heating is canceled.

[Function] In the first invention, when the overheating prevention function is canceled by the overheating prevention canceling means, the necessary heating temperature can be obtained regardless of the temperature detected by the temperature sensor.

Further, while the overheating prevention function is canceled, a sound notifies you that the overheating prevention function is canceled.

Therefore, the user is alerted to overheating by the sound, and when it is no longer necessary to cancel the overheating prevention function due to completion of cooking, etc., the user is prompted by the sound to restore the overheating prevention function or stop heating.

In the second invention, when the overheating prevention function is canceled by the overheating prevention canceling means, the necessary heating temperature can be obtained regardless of the temperature detected by the temperature sensor.

Further, when the overheating prevention function is canceled, a timer is activated in conjunction with this, and when the timer operation ends, heating is stopped at the same time.

Therefore, even if the overheating prevention function is canceled, heating is always stopped when the timer ends, so overheating and ignition of the food to be cooked can be prevented.

In the third invention, when the overheating prevention function is canceled by the overheating prevention canceling means, the necessary heating temperature can be obtained regardless of the temperature detected by the temperature sensor.

In addition, even if the overheating prevention function is canceled, the overheating prevention function will be restored if the user's presence is no longer detected by the user detection means, so if you forget or do not know that the overheating prevention function has been canceled. Even if you leave the vicinity of the filter, if it overheats, the heating will automatically stop when the temperature sensor detects the temperature.

In addition, in the fourth invention, even if the overheating prevention function is canceled, when the presence of the user is no longer detected by the user detection means, heating automatically stops, so that it is possible to know that the overheating prevention function has been canceled. Even if you forget or unknowingly leave the vicinity of the stove, you can prevent the food to be cooked from overheating or catching fire, and a dangerous situation will not occur.

[Effects of the Invention] In the first invention, while the overheating prevention function is released, a sound alerts the user that there is a risk of overheating. Even if you move away from the stove, you will be notified by sound that heating is in progress, so you will be less likely to forget to turn off the heating.

Therefore, it is possible to ensure greater safety than the conventional one.

In the second invention, when the overheating prevention function by the temperature sensor is canceled, the safety function by the timer is activated instead.

Therefore, even if you accidentally move away from the stove while the overheating prevention function is disabled, it is safe because heating will stop when the timer stops.

In the third invention, even if the overheating prevention function is canceled, when the user leaves the vicinity of the stove, the overheating prevention function is restored.

Therefore, even if the user inadvertently leaves the stove while the overheat prevention function is disabled, it is safe because heating will be stopped based on the temperature detected by the temperature sensor.

In the fourth invention, heating is stopped when the user leaves the stove, so it is safe.

[Example] Next, the present invention will be explained based on examples.

FIG. 2 shows a gas stove 1 equipped with the stove control device of the present invention. Two gas stoves 2.3 are provided on the upper surface of the gas staple 1, and the gas stoves 2.3 are provided on the front side of the gas staple 1. On the front, there is a grill opening/closing door 4a for taking food in and out of the grill 4, which has an inner grill box inside the gas staple 1, and a fire extinguisher for operating each gas stove 2.3 and grill 4, respectively. There are buttons 5.6.7 and an operating panel 20 for setting the operating state of each gas hob 2.3 and grill 4.

Each gas stove 2.3 performs normal heating operation, and
It has an overheat prevention function that stops combustion when the temperature of the food to be cooked rises above a certain temperature, and for this purpose, there is a pot etc. in the center of the stove burners 2a and 3a of each gas stove 2.3. Temperature sensors 2b and 3b each having a built-in thermistor for detecting the temperature of the cooking container are provided, and the temperature sensor 2b
, 3b, safety control such as stopping fuel supply and heating is performed by a control circuit 30, which will be described later, to ensure safety.

Each of the temperature sensors 2b and 3b is supported by a spring (not shown) in an upward direction on the gas staple 1, so that the detection portion comes into elastic contact with the cooking container or the like and comes into close contact with the cooking container.

Moreover, each temperature sensor 2b, 3b is equipped with a lifting device (not shown), and is raised in response to an ignition operation and lowered in response to an extinguishing operation.

As shown in FIG. 3, the grill burner 4b, which consists of two burners installed at the back of each stove burner 2a, 3a and the grill opening/closing door 4a and placed above and below the food to be cooked, is equipped with a fuel gas (not shown). Fuel supply pipes 8a, 8b, 8 branched from the gas pipe 8 connected to the supply port
Each burner 2a, 3a, 4b has an ignition chamber i2d, 3d, 4d that performs spark discharge for ignition, and a thermocouple 2e that senses combustion heat and generates an electromotive force. 3e, 4e
It is prepared.

Each of the fuel supply pipes 8a, 8b, and 8c is provided with an integrally constructed pontoon bridge [11, 12, 13, respectively, in order to cut off the fuel gas and adjust the amount of gas.

As the valve function parts constituting each valve mechanism 11, 12, 13, the fuel control valve 11 is arranged from the downstream side to the upstream side.
a, 12a, 13a, main valve 11b, 12b, 13b
, electromagnetic safety valves 11c and 12C113c.

Each fuel control valve 11a, 12a, 13a is connected to a gas amount control lever 5a, 6a, 7 provided in front of the gas staple l.
The valve opening degree is changed by a, and the amount of fuel supplied to each burner is adjusted.

The main valves 11b, 12b, and 13b open and close in response to the operation of the extinguishing button 5.6.7 provided on the front of the gas staple 1, and each time the extinguishing button 5.6.7 is pressed once. It has a so-called push/pull switch type cam mechanism that alternately changes between an open state and a closed state.

The electromagnetic safety valves 11c, 12c, 13c are each main valve 11.
When the main valves 11b, 12b, 13b are changed from the closed state to the open state by the ignition push operation of 6.7, the ignition/extinguishing button etc. The valve is opened, the push operation is released (stopped), and the ignition/extinguishing button 5.6.7 is activated by the cam mechanism to close the main valve 1.
When the valves 1b, 12b, and 13b are maintained in the open position where the valves 1b, 12b, and 13b are kept open, a current exceeding a certain value is applied to the separately provided coil by the output of the thermocouples 2e, 3e, and 4e. only stays open and misfires,
If the current is small due to an ignition error, etc., it becomes closed and gas supply is stopped.

In addition, the electromagnetic safety valve 11C21 in gas stove 2.3
As for 2c, the current for the forced interval is applied as an initial current only at the initial stage of ignition, regardless of the outputs of the thermocouples 2e and 3e.

Ben I! In addition, on structure 11, 12, and 13, there is also an on/off button 5.
．． An ignition switch lld, ], 2d, 13d is provided which closes the contacts only while the ignition press operation of 6.7 is struck.

In addition, each main valve 11 is attached to each point extinguishing button 5.6.7.
In order to detect the valve open position for keeping the valves b, 12b, and 13b open, the signal switch llc, 1 for valve open position detection is used.
2e, 13e are provided, and signal switches lle,
12e is used as a switch to start supplying initial current to the electromagnetic safety valves 11c and 12c, and also as a lift switch for driving the lift device of the temperature sensors 2b and 3b.

In the gas staple 1 having the above configuration, each burner is controlled by a control circuit 30 provided within the gas staple 1.

The control circuit 30 is formed around a microcomputer, and as shown in FIG.
．． 3 and grill 4, the stove control section 31.32
and each mechanical section of the grill control section 33.

Since each of the stove control sections 31 and 32 performs similar control, only the stove control section 31 that controls the cast stove 2 f81f will be explained here.

When the ignition switch lld linked to the ignition/extinguishing button 5 closes its contacts, the stove control unit 31 causes the ignition electrode 2d to discharge sparks and starts combustion in the stove burner 2a.

Also, while the stove burner 2a is burning, the thermocouple 2
The coil of the electromagnetic safety valve 11c is energized by the output from e to attract the valve body and maintain it in the open state. When the stove burner 2a misfires due to overboiled 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 fuel gas is stopped.

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

For this purpose, when the signal switch 11e or the contact is closed in response to the ignition operation, the gate motor of the lifting device is driven to raise the temperature sensor 2b so that it comes into contact with the cooking container, and it rises while the signal switch lie closes the contact. When the signal switch lle opens the contact in response to the extinguishing operation, the temperature sensor 2b is lowered away from the cooking vessel.

In this case, the raised position and lowered position of the temperature sensor 2b are detected by microswitches provided corresponding to the respective positions, and the drive of the geared motor is stopped in accordance with the detection signal of each microswitch. (Not shown) Controls to prevent overheating include a low-cut operation that stops the fuel supply when the temperature of the food to be cooked reaches about 130°C or higher to prevent non-stick cooking, etc.
The temperature limit has been further increased to approximately 25 degrees so that you can cook tempura, etc.
There are two types: a high-cut operation in which the temperature is raised to 0°C.

In this embodiment, the operation mode is switched each time the changeover switch 21b provided on the operation panel 20 is operated, and in response to the switching of the operation mode, a green LED 22b provided close to the on/off button 5 is activated. and red L
The ED 23b displays that each mode is a low-cut operation mode or a high-cut operation mode.

Regarding the gas stove 3, the operation panel 20 also includes a changeover switch 21c, a green LED 22c, and a red LED 23.
c is similarly provided.

In order to perform safer operation, the low-cut operating mode with a lower temperature limit is entered upon start of use, and when the selector switch 21b is pressed, the operating mode is changed to the high-cut operating mode. In each operating mode,
When the above-mentioned temperature is detected, the power supply to the electromagnetic safety valve 11c is stopped, and the fuel supply is stopped.

In this overheating prevention control, the ignition/extinguishing button 5 is pressed against the electromagnetic safety valve 11 while keeping the main valve 11b open.
c will be closed, the buzzer 34 will notify the user that overheating prevention control has been carried out through temperature detection, and the user will press the on/off button 5.
prompts the main valve 11b to be closed by pressing the button.

Further, the stove control unit 31 cancels the overheating prevention control so that the overheating prevention control is not performed when dry-frying the cooking container or frying food.

As mentioned above, in this example, at the start of heating,
The low-cut operating mode is automatically selected, and then the high-cut operating mode can be selected if necessary. However, in this high-cut operating mode, the upper limit temperature is approximately 250°C, so if you leave it as it is, it will not dry out. This is because the overheat prevention control cannot be stir-fried, and the overheating prevention control is canceled 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. Then, the overheating prevention control is resumed. Note that the stove 3 also has a release switch 24b.

In the first embodiment of the present invention, when the overheating prevention control is canceled, the buzzer 34 is driven to notify with a sound that the overheating prevention control has been canceled; During this period, the overheating prevention control is continuously driven, and the user is continuously informed by sound that the overheating prevention control is released.

As a result, during cooking, you can be aware that the overheating prevention control has been released, and you will not be able to easily leave the gas staple l. Even if you do leave the gas staple, the sound of the buzzer 34 will alert you that heating is in progress. Because you can understand this, you will never forget to stop the heating.

In addition, while the overheating prevention control is canceled, the green LED
22b and the red LED 23b are both turned off, indicating that neither the low-cut operation mode nor the high-cut operation mode is set.

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

In addition, while the overheating prevention control is released, the temperature sensor 2b is driven to the lowered position by the lifting device to protect it from heat in order to prevent it from being overheated by the stove burner 2a. .

The overheating prevention control can be canceled by canceling each power/operation mode using the electric circuit (microcontroller), or by canceling each cut operation mode in the electric circuit. , temperature sensors 2b, 3
Each cutting operation mode may be substantially canceled by disabling detection of the temperature of the cooking container by lowering b.

In the control of the grill 4 by the grill control unit 33, the grill burner 4b is ignited when the ignition switch 13d closes its contact point in response to the ignition/extinguishing button 7 being pressed. perform the action,
While the signal switch 13e closes the contact, safety control is performed by detecting misfire etc. using the thermocouple 4e.However, safety control is performed by limiting the heating time, not by temperature detection, to prevent overheating. ensure that

For this purpose, the grill control section 33 is equipped with a timer section 33a, and when the operation of the timer section 33a stops, the electromagnetic safety valve 13c is automatically closed to stop the supply of fuel gas.

The timer section 33a performs the ignition operation and fires the grill burner 4b.
The thermocouple 4e starts operating when the ignition of the thermocouple 4e is detected, and usually ends the operation after 15 minutes have elapsed.

Further, the timer section 33a includes a timer setting key 24 on the operation panel 20 and a time display section 25 that displays the operating time in two-digit Arabic numerals using seven segments.
Any time within minutes can be set as the operating time.

As mentioned above, the timer section 33a is activated at 1 when the operation starts.
If 5 minutes is set, and then the timer setting key 24 is pressed, the set time becomes 1 minute, and thereafter, each time the timer setting key 24 is pressed, the set time is repeated by 1 minute. It can be set for up to 15 minutes.

Here, when the signal switch 13e closes the contact point, seven segments of the time display section 25 light up and start displaying, and if the time remains unchanged, it is displayed that 15 minutes is set.

In this way, in the timer section 33a, the timer setting key 24
Since the set time is advanced by pressing the button, if the timer section 33a is operating, press the timer setting key 2.
4 allows you to extend the set time at any time.

Therefore, if the timer setting key 24 is not operated, heating will automatically end in 15 minutes, whereas if the timer setting key 24 is operated before the timer section 33a finishes operating, the operating time will be Since it can be easily extended, even if cooking takes time, the grill burner 4b can be used continuously without being extinguished, and cooking failures can be reduced.

In this case, the fire extinguishing operation of the grill burner 4b is performed at 30
The buzzer 34 is activated to notify that the end of heating by the grill burner 4b is approaching.
If the user operates the timer setting key 24 in response to the notification by 4, the usage time of the grill burner 4b can be extended without fail.

Furthermore, even when the operating time is set using the timer setting key 24, the operating time can be extended in the same way.
Even if the preset time is not appropriate, heating can be performed continuously.

The time display section 25 displays the time in minutes when the operating time of the timer section 33a is one minute or more, and displays the time in seconds when the operating time is less than one minute. When there is an operation to extend the time, 1 minute is set in the first operation, and the operating time is increased by the minute thereafter.

The ignition lamp 26 provided close to the ignition/extinguishing button 7 is turned on to indicate an ignition detection state when the temperature detected by the thermocouple 4e provided close to the grill burner 4b exceeds a predetermined temperature. When the value drops, the light is turned off as a misfire detection condition.

In the grill control unit 33, when the electromagnetic safety valve 13c is closed due to misfire detection etc. even though the main valve 13b is not closed by the ignition/extinguishing button 7 and the signal switch 13e is in the state where the contact is closed. The buzzer 34 notifies the user of the notification.

The buzzer 34 not only notifies the end of the operation of the timer section 33a, but also the buzzer 34 notifies the end of the operation of the timer part 33a, and even after the end of the operation, the buzzer 34 gives a notification every one minute until the valve closing operation (extinguishing operation) of the main valve 13b is performed using the ignition extinguishing button 7. A notification is repeatedly given to prompt the user to close the main valve 13b.

The lock lever 9 provided on the front of the gas staple 1 is
In order to prevent young people from inadvertently operating the ignition, the 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 stove 1 of this embodiment having the above configuration will be explained based on FIG. 1.

When the user performs the ignition operation using the ignition/extinguishing button 5,
When the main valve 11b is opened, the electromagnetic safety valve 1
1c is in an open state, and fuel gas is supplied to the stove burner 2a.

At this time, the signal switch lle and the ignition switch li
d closes the contact, and in the stove control unit 31, in response to the closing operation of the signal switch ILe, a current is supplied to the electromagnetic safety valve 11c for a certain period of time (for example, 20 seconds) to forcibly maintain the open state. Electricity is applied, and overheat prevention control is started (step 1), and in response to the closing operation of the ignition switch lid, the ignition electrode 2d is turned on by a high voltage generation circuit (not shown).
A spark discharge occurs.

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

When the user releases the push operation of the ignition/extinguishing 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 from the capacitor and 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 is detected based on the output of the thermocouple 2e.
The electromagnetic safety valve 11c is continuously attracted and maintained in the open state.

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

After that, when the user operates the changeover switch 21b as necessary, the low-cut operation mode changes to the high-cut operation mode, and the green LED 22b goes out and the red LED 23b lights up instead.

Furthermore, when the release switch 24a is operated as necessary (YES in step 2 = overheating prevention control is canceled (step 3), the low-cut operation mode and the high-cut operation mode are stopped, and the temperature sensor 2b
is driven to the lowered position, and heating is performed without limit regardless of the temperature detected by the temperature sensor 2b.

At this time, the buzzer 34 notifies you with a continuous or intermittent sound that the overheating prevention control has been canceled (Step 4).

Therefore, it is less likely that the user will inadvertently forget that the overheating prevention control has been canceled and leave the gas staple 1.

In addition, even if the gas staple 1 is separated, the buzzer 34
Since the notification is continuously performed, the gas stove 2 is not left unattended in a heated state.

If the release switch 24a is not operated in the state where the overheating prevention control is released, N is selected in step 5.
O) Step 3 and subsequent steps are repeated, and the buzzer 34 continues to issue notifications while the overheating prevention control is released.

Release switch 2 when overheating prevention control is released
4a is operated (YES in step 5), the process moves to step 1, where overheating prevention control is performed again based on the temperature detected by the temperature sensor 2b, and the low-cut operation mode or high-cut operation mode selected by the changeover switch 21b is performed. .

When the user performs a fire extinguishing operation using the on/off button 5, the main valve 11b is closed and the fire is extinguished, and the signal switch lle
opens the contacts and turns off the overheat protection.

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

As described above, in this embodiment, the overheating prevention control can be canceled with the release switch, so the necessary heating power can be easily obtained, and the buzzer notifies that the overheating prevention control has been canceled. It can be used safely because care can be taken to prevent overheating.

In this embodiment, a buzzer is used to notify that the overheating prevention control has been canceled, but the notification may be made using a chime, a synthesized sound effect, or voice.

Alternatively, the information may be notified by light such as a lamp.

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

In the second embodiment, as shown in FIG. 5, each stove control section 31, 32 is equipped with a safety timer 31a that starts operating when the overheat prevention control is canceled by a release switch and measures a predetermined time T1. , 32a are provided, and when the operation of the safety timers 31a, 32a ends, the thermocouples 2 to the electromagnetic safety valves 11c, 12c are connected accordingly.
As a result, when the overheating prevention control is canceled, the stove burners 2a, 3e are stopped, regardless of the temperature detected by the temperature sensors 2b, 3b, after a predetermined time T1 has elapsed since the cancellation. The supply of fuel gas to 3a is stopped, and combustion is automatically stopped.

Here, the operating time of the safety timers 31a, 32a depends on the heating capacity of each stove burner 2a, 3a, for example.
It is set to 5-10 minutes.

Hereinafter, the operation of the gas stove 2 in the second embodiment will be explained with reference to FIG. 6.

When the user performs the ignition operation using the ignition/extinguishing button 5,
Similar to the first embodiment described above, the ignition operation is performed in a predetermined sequence to start combustion in the stove burner 2a, and overheat prevention control is started (after step, the release switch 24a is operated as necessary. and (Y in step 12
ES), overheating prevention control is canceled (step 13).

Further, following this, the safety timer 31a is activated for a predetermined period of time T1.
starts counting the time (step 14).

Thereafter, it is determined whether the predetermined time T1 has elapsed, and if the predetermined time T1 has not elapsed (No in step 15), the release switch 24a is operated while the overheating prevention control is released. If the release switch 24a is not operated (No in step 16), step 15 and subsequent steps are repeated, and if the release switch 24a is operated (Y in step 16)
ES), the process moves to step 11 and overheating prevention control is performed again.

If the predetermined time T1 has elapsed (YES in step 15), the thermocouple 2e to the electromagnetic safety valve 11c
The energization is stopped, the fuel supply to the stove burner 2a is stopped, and combustion is stopped (step 17).

Therefore, even if you accidentally forget that the overheating prevention control has been canceled, it is safe.

Next, as a modification of the second embodiment, for example, in FIG. 6, as shown by the dotted chain line, the temperature detected by the temperature sensor 2b next to the step knob 13 in the high-cut operation mode is the eye temperature. It is determined whether or not the temperature has reached 250°C (step 20), and if the temperature has not reached 250°C (No in step 20), the temperature reaches 250°C without starting the operation of the safety timer 31a. When the temperature reaches 250° C., the process moves to step 14 and the safety timer 31a is started.

In this case, the safety timer 31. It is necessary to shorten the operating time of a in comparison with the above-mentioned predetermined time 1'l (5 to 10 minutes); for example, the operating time 1'5T2 is set to 3 minutes.

Furthermore, in this case, since temperature detection by the temperature sensor 2b is required, there is no need to lower the temperature sensor 2b to the lowered position, and therefore, the elevating device for the temperature sensor 2b may be omitted.

Next, a third embodiment of the present invention will be described based on FIG. 7.

In the third embodiment, each cut operation mode is not canceled within the control circuit 30 as the overheat prevention control cancellation operation in step 31, but the cancellation operation is performed by lowering the temperature sensor 2b as an external process.

Then, in step 15, when the predetermined time T1 is counted by the safety timer 31a (step 15
(YES), the temperature sensor 2b is increased by 1 (step 32), thereby returning to overheating prevention control (step 11).

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

When the device returns to normal mode, cooking can continue unless the temperature limit in each cutting operation mode is detected.

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

Note that in these embodiments, the notification by the buzzer 34 in the first embodiment is basically not performed, but the notification by the buzzer 34 may be combined.

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

The fourth embodiment, as shown in FIG. 8, includes an infrared sensor 35 that transmits a signal to each stove control unit 3 and 32,
As shown in FIG. 9, this infrared sensor 35 is incorporated into, for example, the operation panel 20 of the gas staple 1, and the infrared sensor 35 detects whether there is a user in front of the gas staple 1 or in its vicinity, as shown in the shaded area. The overheating prevention control is continued only when the user is detected near the gas staple 1, and when the user is no longer detected near the gas staple 1, the overheating prevention control is canceled. I'm trying to come back.

In this case, even if the user is near the gas staple 1-, the user may occasionally leave the gas staple 1-for example, to bring seasonings, etc. In order to ensure that the overheating prevention control does not always return when the user is no longer detected, but only when the user is not detected for a certain period of time, the control is set for a fixed period of time t (for example, 1 minute). Dyma 31b for timing
, 32b are provided to improve usability.

Hereinafter, the operation of the gas stove 2 in the fourth embodiment will be explained as follows.
This will be explained with reference to the figure.

When the user performs the ignition operation using the ignition/extinguishing button 5,
Similar to the first embodiment described above, the ignition operation is performed in a predetermined sequence to start combustion in the stove burner 2a, and overheat prevention control is started (step 21).

Thereafter, when the release switch 24a is operated as necessary (YES in step 22) - the infrared sensor 35
It is determined whether or not a user is detected near the gas staple 1, and if a person is detected (YES in step 23), the overheating prevention control is canceled (step 24), and if a person is detected. If not (NO in step 23), the process moves to step 21 and overheating prevention control is subsequently performed.

Thereafter, it is determined whether or not a person is continuously detected, and if a person is detected (YES in step 25), it is determined whether or not the release switch 24a has been operated, and the release switch 24a is If there is no operation (NO in step 26), the process moves to step 24 and the overheating prevention control is continued to be released, and if the release switch 24a is operated (YES in step 26), the process moves to step 21. Overheat prevention control is performed again.

On the other hand, if no person is detected in step 25 (No>), time measurement by the timer 31b is started (step 27), and it is determined whether or not the time during which no person is detected has reached a certain time t (step 28).

Here, if a person is not detected even after one minute has passed (YES in step 28), the process moves to step 21 and the overheating prevention control is automatically restored.

Therefore, even if it is discovered that the overheating prevention control has been canceled and you move away from the gas staple 1, the overheating prevention control will automatically be restored, so it is safe.

Furthermore, until one minute has elapsed (NO in step knob 28), it is determined whether a person is detected in step 25, and if a person is detected again during that time, the timer 31b is stopped, and from step 24 onwards, the timer 31b is stopped and It is easy to use because the overheating prevention control of the device continues to be released.

Next, a fifth embodiment will be described with reference to FIG. 11.

In the fifth embodiment, as in the fourth embodiment, the infrared sensor 35 determines whether or not a person is detected in the vicinity of the gas staple 1, and if the result of the determination is that no person is detected, the answer is NO in step 23. ), the electromagnetic safety valve 11c is closed and heating is stopped (step 35).

Furthermore, even if a person is detected and the overheating prevention control is canceled at the time when the release switch 24a is operated (step 24)
, If no person is detected after that (NO in step 25), the timer 3 is activated as in the fourth embodiment.
1b is activated to start timing (step 27), and if no person is detected again after a certain period of time t (YES in step 28), the electromagnetic safety valve 11C is forcibly activated.
is completed (step 35), and heating is stopped.

Note that the infrared sensor 35 may be attached to a wall other than the gas staple 1, for example, in the kitchen.

Further, in the above embodiment, an infrared sensor is used as the user detection means, but the presence of a person may be determined by incorporating a weight sensor and a pressure sensor into the kitchen mat and detecting the person's weight.

In the above embodiment, a release switch is provided to cancel the overheating prevention control, but the method for canceling the overheating prevention control is to check whether the cooking container is dry or not based on the change in temperature detected by the temperature sensor. It is also possible to automatically determine that the food is stir-fried and release the overheating prevention control based on the determination result.

Although a temperature sensor that is brought into contact with the cooking container is shown, a non-contact type temperature sensor using infrared rays may be used, or a temperature sensor that is placed in the cooking container may be used.

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

In the following embodiments, a stove in a gas stove is shown, but a stove in an electric range may also be used.

[Brief explanation of the drawing]

FIG. 1 is a flowchart for explaining a first embodiment of a stove control unit in a gas stapler showing an embodiment of the present invention;
The figure is a perspective view showing the cast table of this embodiment, FIG. 3 is a gas circuit diagram showing the gas circuit in the gas staple of this embodiment, and FIG. 4 is a diagram for explaining the function of the control circuit of the first embodiment. Functional block diagram, FIG. 5 is a functional block diagram for explaining the functions of the second and third embodiments of the control circuit, FIG. 6 is a flowchart for explaining the second embodiment of the stove control section, and FIG.
The figure is a flowchart for explaining the third embodiment of the stove control section, FIG. 8 is a functional block diagram for explaining the functions of the fourth and fifth embodiments of the control circuit, and FIG. 4.5 A plan view of the gas staple to explain the characteristics of the infrared sensor in the embodiment, FIG. 10 is a flowchart to explain the fourth embodiment of the stove controller, and FIG. 11 is a diagram of the stove controller. It is a flow chart for explaining a fifth example. In the diagram, 2.3... Gas stove (stove), 2b, 3b
...Temperature sensor, 24a, 24b...Release switch (overheat prevention release means), 31.32...Stove control unit (stove control device>, 31a, 32a...Safety timer (timer) , 34...buzzer (notification means), 35.
...Infrared sensor (user detection means).

Claims (1)

[Scope of Claims] 1) A stove control device including a temperature sensor for detecting the temperature of the food to be cooked and having an overheating prevention function that controls heating based on the temperature detected by the temperature sensor, comprising: An overheating prevention canceling means for canceling the overheating prevention function, and a notifying means for notifying by sound that the overheating prevention function has been canceled by the overheating prevention canceling means, the notifying means is configured to cancel the overheating prevention function. A stove control device characterized in that it notifies when the is released. 2) In a stove control device that is equipped with a temperature sensor for detecting the temperature of the food to be cooked and has an overheat prevention function that controls heating based on the temperature detected by the temperature sensor, the overheat prevention function is canceled. What is claimed is: 1. A control device for a stove, comprising: overheating prevention canceling means for canceling the overheating prevention function; and a timer that operates in conjunction with canceling the overheating prevention function, and stopping heating when the timer ends. 3) In a stove control device that is equipped with a temperature sensor for detecting the temperature of the food to be cooked and has an overheat prevention function that controls heating based on the temperature detected by the temperature sensor, the overheat prevention function is canceled. and a user detection means for detecting the presence of a user near the stove, and when the overheat prevention function is canceled by the overheat prevention release means, the overheat prevention function is canceled. If the presence of the user is no longer detected by the user detection means,
A stove control device characterized by restoring the overheating prevention function. 4) In a stove control device that is equipped with a temperature sensor for detecting the temperature of the food to be cooked and has an overheat prevention function that controls heating based on the temperature detected by the temperature sensor, the overheat prevention function is canceled. and a user detection means for detecting the presence of a user near the stove, and when the overheat prevention function is canceled by the overheat prevention release means, the overheat prevention function is canceled. If the presence of the user is no longer detected by the user detection means,
A stove control device characterized by stopping heating.