KR940000171B1 - Controller for cooking device - Google Patents

Abstract

The invention relate to prevent a failure in cooking such as a scorching and prevent dangerous state such as a fire ignition. When a user operates a releasing switch 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 temp. sensor is driven to its descending position and a heating operation is carried out limitlessly without being related to a sensed temp. of temp. sensor. At this time, it is informed by a continuous sound or an intermittent sound with a buzzer that the over-heating preventive control is released.

Description

Control equipment

1 is a flowchart for explaining the first embodiment of the furnace control unit in the gas table according to the embodiment of the present invention.

2 is a perspective view showing a gas table of this embodiment.

3 is a gas circuit diagram showing a gas circuit in the gas table of this embodiment.

4 is a functional block diagram for explaining the functions of the first embodiment of the control circuit.

5 is a functional block diagram for explaining the functions of the second and third embodiments of the control circuit.

6 is a flowchart for explaining a second embodiment of the furnace control unit.

7 is a flowchart for explaining a third embodiment of the furnace control unit.

8 is a functional block diagram for explaining the functions of the fourth and fifth embodiments of the control circuit.

9 is a plan view of a gas table for explaining the characteristics of the infrared sensor in the fourth and fifth embodiments of the present invention.

10 is a flowchart for explaining a fourth embodiment of the furnace control unit.

11 is a flowchart for explaining a fifth embodiment of the furnace control unit.

* Explanation of symbols for main parts of the drawings

2,3 gas stove (blow furnace) 2b, 3b: temperature sensor

24a, 24b: release switch (overheat prevention release means)

31,32: furnace control unit (control unit of the furnace) 31a, 32a: safety timer (timer)

34: buzzer (notification means) 35: infrared sensor (user detection means)

The present invention relates to a control apparatus of a stove having an overheat prevention function for automatically controlling heating based on a temperature of a workpiece to be detected by a temperature sensor.

In a stove such as a gas table, in order to prevent the cooked food from sticking or igniting the cooking oil, a temperature sensor which detects the temperature of the cooked food (cooked food) by contacting the bottom of the cooked food container is used. There is a control device which controls the heating by automatically stopping or weakening the fuel supply to the burner when the detection temperature reaches a predetermined temperature or more.

In the case of the control device, the temperature for preventing sticking in the case of simmered food is set to 130 ° C. and 230 ° C., respectively, so that the user can select with a selector switch.

In addition, when cooking dishes or stir fry dishes, a temperature higher than 230 ° C., which is the upper limit temperature for frying foods, is required, and heating is automatically weakened or stopped. Therefore, a release switch is provided for canceling the overheat prevention function so that the heating is not automatically weakened or stopped.

However, in the above, once the overheat protection function is released by the release switch, it is easy to forget to release the release unless the user is surely aware of it.

Therefore, even if the overheat protection function is released, if the overheat protection function is considered to move and is removed from the stove, a dangerous situation that causes press or fire is likely to occur.

It is an object of the present invention to provide a control device for a stove in which heating power as required is reliably obtained and which is not in a dangerous state due to cooking failure or ignition due to pressing or the like.

The present invention has a temperature sensor for detecting a temperature of a workpiece, and a control apparatus for a stove having an overheat prevention function for controlling heating based on the detection temperature of the temperature sensor, wherein in the first invention, the overheat prevention And an overheat prevention releasing means for releasing the function, and a notifying means for sounding out that the overheat protection function is released by the overheat prevention releasing means, wherein the notifying means may be deactivated. In this case, it is a technical means to make a notification.

According to a second aspect of the present invention, there is provided an overheat prevention releasing means for releasing the overheat protection function, and a timer operative to observe the releasing of the overheat protection function. .

According to a third aspect of the present invention, there is provided an overheat prevention release means for releasing the overheat prevention function, and a user detection means for detecting the presence of a user around the furnace, wherein the overheat prevention function is released by the overheat prevention release means. When there is no user's presence detected by the user detecting means, the technical means is to return the overheat prevention function.

According to a fourth aspect of the present invention, there is provided an overheat prevention release means for releasing the overheat prevention function and a user detection means for detecting the presence of a user in the vicinity of the furnace, wherein the overheat prevention function is released by the overheat prevention release means. In this case, the technical means is to stop the heating when the presence of the user is not detected by the user detecting means.

In the first invention, when the overheat prevention function is released by the overheat prevention releasing means, the required heating temperature can be obtained regardless of the temperature detected by the temperature sensor.

In addition, while the overheat protection function is released, a sound is notified that the overheat protection function is released.

Therefore, the user listens to the sound and pays attention to overheating, and when the user does not need to cancel the overheat prevention function due to the end of cooking, the user prompts the return of the overheat prevention function as a sound or the stop of heating.

In the second invention, when the overheat prevention function is released by the overheat prevention releasing means, the required heating temperature can be obtained regardless of the temperature detected by the temperature sensor.

In addition, when the overheat protection function is released, the timer is operated in connection with it, and when the timer operation ends, the heating is stopped with it.

Therefore, even if the overheat prevention function is released, the heating is always stopped when the timer is finished, thereby preventing overheating or ignition of the workpiece.

In the third invention, when the overheat prevention function is released by the overheat prevention releasing means, the required heating temperature can be obtained regardless of the temperature detected by the temperature sensor.

Also, even if the overheat protection function is released, if the presence of the user is not detected by the user detection means (that is, if the user is not detected for a predetermined time set by the timer), the overheat protection function is automatically returned. Even if you forget that the overheat protection function has been released or if you have left the stove without knowing it, the heating will be automatically stopped by the temperature sensor of the temperature sensor.

Further, in the fourth invention, even if the overheat protection function is released, the heating is automatically stopped when the presence of the user is not detected by the user detection means, so that the overheat protection function is forgotten or unknowingly troubled. Even if you leave from the surrounding area, you can prevent overheating or ignition of the workpiece, so it is not dangerous.

In the first invention, while the overheat protection function is released, the state of overheating is notified by sound, so there is less effort to leave the stove, and, for example, as a sound that it is heating even when away from the stove. Since it becomes known, it is less likely to neglect the operation of heating stop.

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

In the second invention, when the overheat protection function is released by the temperature sensor, the safety function by the timer is acted on instead.

Therefore, even if you forgot to leave the overheating function while the overheat protection function is released, it is safe because the heating is stopped when the timer stops.

In the third invention, even if the overheat protection function is released, the overheat protection function returns when the user leaves the vicinity of the stove.

Therefore, even if you forget to flicker in the state where the overheat protection is released and leave the stove, the heating is stopped based on the temperature detected by the temperature sensor.

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

The following describes an embodiment of the present invention with reference to the drawings.

2 shows a gas table 1 having a control device for a furnace according to the present invention, wherein two gas furnaces 2 (, 3) are formed on the upper surface of the gas table 1, and the gas table ( In front of the front side immediately before 1), the grill opening and closing door 4a for putting food into and out of the grill 4 with the grill inner case formed inside the gas table 1, and each of the gas stoves 2 and 3 and the grill Ignition, fire extinguishing button (5), (6), (7) for operating (4), and operation panel (20) for setting the operating state of each gas stove (2), (3) and grill (4) ) Is formed.

Each gas furnace (2), (3) has a normal heating operation, and has an overheating prevention function to stop combustion when the temperature of the cooked object rises above a certain temperature, so that each gas furnace (2), ( In the center of the goro burners 2a and 3a of 3), temperature sensors 2b and 3b, which are equipped with thermistors for detecting cooking containers such as pots, are provided. On the basis of the detection temperature of 3b), safety control such as stopping the fuel supply and stopping the heating is performed by the control circuit 30 described later to ensure stability.

In addition, each temperature sensor 2b, 3b is pressed against the upper side of the gas table 1 by the spring which is not shown in figure, and the detection part is made to contact with an elastic contact with a cooking container etc. by close contact.

Moreover, each temperature sensor 2b, 3b is equipped with the lifting device which is not shown in figure, and raises corresponding to an ignition operation, and descends corresponding to an extinguishing operation.

As shown in FIG. 3, the grill burner 4b formed of each burner burner 2a, 3a and the grill opening and closing door 4a and which consists of two burners arranged up and down with respect to the food is shown in FIG. The fuel supply pipes 8a, 8b and 8c which are dispersed from the gas pipe 8 which is connected to the supply port of the fuel gas which is not supplied are connected.

In addition, each burner 2a, 3a, 4b has an ignition electrode 2d, 3d, 4d that discharges sparks to ignite, and a thermocouple 2e that generates electromotive force by detecting combustion heat. , (3e) and (4e) are provided.

In each fuel supply pipe 8a, 8b, 8c, valve mechanisms 11, 12, 13 which are integrally formed in order to shut off fuel gas and adjust the gas amount are formed, respectively.

As valve function part which comprises each valve mechanism 11, 12, 13, the fuel control valve 11a, 12a, 13a, the main valve 11b from the downstream side to the upstream side, respectively. And 12b, 13b, and electronic safety valves 11c, 12c, and 13c.

Each fuel control valve 11a, 12a, 13a is a gas flow control lever 5a, 6a, 7a formed on the front of the gas table 1 to change the opening degree of the valve to each burner. To adjust the fuel supply.

The main valves 11b, 12b, and 13b are opened and closed according to the operation of the ignition, fire extinguishing buttons 5, 6, and 7 formed on the front of the gas table 1, and the ignition and fire extinguishing buttons. Each press of (5), (6) and (7) has a so-called push-push cam mechanism that alternates between open and closed states.

The solenoid safety valves 11c, 12c and 13c are opened and closed in connection with the opening and closing operations of the respective main valves 11b, 12b and 13b, and the ignition and fire extinguishing buttons 5 and 6 are provided. If the valve is opened when the ignition pressing operation of (7) is performed and the main valves 11b, 12b, and 13b are changed from the closed state to the open state, this pressing operation is released (stopped), and the ignition The fire extinguishing buttons 5, 6 and 7 are separately formed when the main valves 11b, 12b and 13b are held in the valve open position by the cam mechanism to keep the main valves 11b, 12b and 13b open. When the coil is energized by the output of thermocouples 2e, 3e, and 4e above a certain value, it is kept open.If the current is low due to fire or ignition miss, It is in the closed state and the supply of gas is stopped.

In addition, for the electronic safety valves 11c and 12c in the gas stoves 2 and 3, a current for forcibly opening only in the initial stage of ignition is initialized regardless of the output of the thermocouples 2e and 3e. It is energized as a current.

In the valve mechanisms 11, 12, and 13, the ignition switch 11d which closes the contact only while the ignition, fire extinguishing buttons 5, 6, and 7 are ignited and pressed, 12d and 13d are formed.

In addition, in each ignition, fire extinguishing button 5, 6, and 7, in order to detect the valve opening position which keeps each main valve 11b, 12b, 13b in the open state, it opens the valve opening position. Signal switches 11e, 12e, 13e for detection are provided, and signal switches 11e, 12e are energization start switches for the initial current to the electronic safety valves 11c, 12c. It is also used as a lift switch for driving the lift 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 formed in the gas table 1.

The control circuit 30 is formed around the microcomputer, and as shown in FIG. 4, the furnace control units 31 and 32 correspond to the gas furnaces 2, 3 and grille 4, respectively. And each functional unit of the grill control unit 33.

Since each of the furnace control units 31 and 32 performs the same control, only an example of the furnace control unit 31 that controls the gas furnace 2 will be described here.

When the ignition switch 11d interlocked with the ignition and fire extinguishing button 5 closes the contact, the furnace control unit 31 discharges sparks at the ignition electrode 2d to start combustion in the furnace burner 2a. .

In addition, when the go-ro burner 2a is in combustion, the coil of the electromagnetic safety valve 11c is energized by the output from the thermocouple 2e, and a valve body is adsorbed and is kept open.

When the cooker burner 2a is turned off due to boiling of the cooked material, and the output of the thermocouple 2e falls, the electronic safety valve 11c closes as a detection state, and the supply of combustion gas is stopped. do.

Also, during combustion, overheat prevention control is also performed to monitor the temperature of the cooked object and prevent overheating based on the detection temperature of the cooking vessel such as a pot by the temperature sensor 2b.

Therefore, when the signal switch 11e closes the contact by the ignition operation, the gear motor of the elevating device is driven to raise the temperature sensor 2b so as to contact the cooking vessel, and while the signal switch 11e closes the contact, It is maintained at the position, and when the signal switch 11e opens the contact by the fire extinguishing operation, the temperature sensor 2b is lowered from the cooking vessel.

In this case, the rising position and the falling position of the temperature sensor 2b are detected by the microswitches formed corresponding to the respective positions, and the driving of the gear motor is stopped by the detection signal of each microswitch (not shown). Did not).

As such, there are two types of control for preventing overheating.

In other words, when the temperature of the cooked food is about 130 ° C or higher to prevent the sticking of the cooked food, the low-cut operation to stop the fuel supply and the cooking can be performed again. It is a high-cut operation that raises the temperature to about 250 ℃.

In this embodiment, the operation mode is switched each time the changeover switch 21b formed on the operation panel 20 is operated, and the green LED 226 installed in the ignition and fire extinguishing button 5 gigai corresponding to the switching of the operation mode. And red LED 23b indicate the low cut operation mode and the high cut operation mode, respectively.

In addition, regarding the gas furnace 3, the operation switch 20 is provided with the switching switch 21c, the green LED 22c, and the red LED 23c in the same shape. Here, in order to make the operation safer, at the same time as the start of use, the low-cut operation mode with a low limit temperature becomes low, and when the changeover switch 21b is pressed, the operation mode is changed to the high-cut operation mode. In each operation mode, When the above-mentioned temperature is detected, energization to the electromagnetic safety valve 11c is stopped, and fuel supply is stopped.

In this overheat prevention control, since the ignition and fire extinguishing button 5 keeps the main valve 11b open, only the solenoid safety valve 11c is closed in that state, so that the overheat prevention control by temperature detection is performed. The buzzer 34 is notified to indicate that the user is aware of the effect, and prompts the user to activate the valve closing operation of the main valve 11b by pressing the ignition and extinguishing button 5.

In addition, the furnace control unit 31 releases the overheat prevention control so that the overheat prevention control is not executed when the cooking vessel is cooked or the stir-frying is performed.

As described above, in the present embodiment, when the heating starts, the low cut operation mode is automatically selected, and then the high cut operation mode can be selected as needed. Since it is about 250 ° C, it is not possible to heat the container or stir in such a state, so that overheat prevention control is performed by operating the release switch 24a provided at the switching switch 21b of the operation panel 20. It is released and returns to the released overheat prevention control.

The furnace 3 also has a release switch 24b.

In the first embodiment of the present invention, when the overheat prevention control is released, the buzzer 34 is driven to indicate that the overheat prevention control is released as a sound, and the buzzer 34 is continuously driven while the overheat prevention control is released. The sound continues to inform the user that the overheat protection control has been released.

Therefore, it is possible to realize that the overheat prevention control is released during cooking, and it is not easy to leave the gas table 1, and even when it is separated, it can be seen that it is heating by the sound of the buzzer 34. The operation which stopped heating does not forget.

In addition, while the overheat prevention control is released, the green LED 22b and the red LED 23b go off together, indicating that the low cut operation mode and the high cut mode are not set.

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

In addition, in order to prevent excessive heating by the go-ro burner 2a while the overheat prevention control is released, the temperature sensor 2d is driven to the lowered position by the elevating device and protected from heat.

In addition, in the method of releasing the overheat prevention control, each cut operation mode is canceled by an electric circuit (microcom), but in any of the cut operation modes in the electric circuit, the temperature sensors 2b and 3b are activated. By lowering the temperature, the temperature detection of the cooking vessel is disabled, so that each cut operation mode may be substantially canceled.

In the grill 4 control by the grill control unit 33, the ignition to the grill burner 4b and the low pressing operation of the fire extinguishing button 7 are performed in the same manner as in the case of the goro burners 2a and 3a. When the ignition switch 13d closes the contact, the ignition operation is performed. While the signal switch 13e closes the contact, the thermocouple 4e performs safety control by detecting misfire or the like. In case of overheating, safety is ensured by limiting heating time, not by temperature detection.

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

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

In addition, the timer unit 33a includes a timer setting key 24 and a time display unit 25 for displaying the operation time in 7-digit alphanumeric characters on the operation panel 20. The time can be set as the operating time.

As described above, the timer unit 33a is set to 15 minutes at the same time as the start of operation, and if there is a pressing operation on the timer setting key 24 thereafter, the setting time is increased by 1 minute, and then the timer setting key 24 again. The setting time is increased by 1 minute each time pressing), up to 15 minutes can be set.

Here, when the signal switch 13e closes the contact, seven segments of the time display section 25 are turned on to start the time display, which indicates that 15 minutes is set in the original state.

In this way, since the setting time can be increased by the operation of pressing the timer setting key 24 in the timer unit 33a, the setting time can be set at any time by the timer setting key 24 while the timer unit 33a is in operation. Can be extended.

Therefore, in particular, when the timer setting key 24 is not operated, the heating is automatically completed after 15 minutes. On the other hand, when the timer setting key 24 is operated before the end of the timer unit 33a, the operation time is easily made. Since it can be extended, even in the case of time-consuming cooking, it can continue to use without extinguishing grill burner 4b, and can reduce the mistake rate of cooking.

At this time, the buzzer 34 is driven 30 seconds before the fire extinguishing operation of the grill burner 4d is signaled, indicating that the end of heating by the grill burner 4b is near, and therefore the timer listens to the sound of the buzzer 34. By operating the setting key 24, the use time of the grill burner 4b can be extended.

In addition, even when the operation time is set by the timer setting key 24, the operation time can be extended in the same manner as described above, so that heating can be continued even if the time already set is not appropriate.

In addition, in the time display part 25, when the operation time of the timer part 33a is more than 1 minute, time is displayed by minute unit, and when it becomes less than 1 minute, it is displayed by the ultra-nude sister, At this time, operation time was extended. In this case, one minute is set by the first operation, and then the operating time is set in increments of minutes.

The ignition lamp 26 provided in close proximity to the ignition and fire extinguishing buttons 7 lights up as the ignition detection state when the temperature detected by the thermocouple 4e provided in proximity to the grill burner 4b becomes above a predetermined temperature. If the detection temperature is lowered, it is turned off as a misfire detection state.

In the grill control unit 33, the valve closing operation of the main valve 13b by the ignition and fire extinguishing buttons 7 is not performed, and the electronic safety valve 13c is detected due to the detection of the lower limit even though the signal switch 13e is closed. Is closed, the user is informed as a buzzer 34.

In addition, the buzzer 34 notifies the end of the operation of the timer unit 33a, and even after the end of operation until the valve closing operation (extinguishing operation) of the main valve 13b by the ignition and fire extinguishing button 7 is performed. It is notified repeatedly every minute, prompting the user to close the valve of the main valve 13b.

The lock lever 9 installed on the front of the gas table 1 is locked so that the ignition and extinguishing buttons 5, 6, and 7 cannot be pressed in order to prevent ignition operation due to inadvertent combustion. It is.

Subsequently, the operation of the gas furnace 2 in the gas table 1 of the present embodiment having the above configuration will be described based on FIG.

When the user performs ignition operation with the ignition and fire extinguishing button 5, the main valve 11b is opened and at the same time, the electronic safety valve 11c is opened, and fuel gas is supplied to the gourd burner 2a. .

At this time, the signal switch 11e and the ignition switch 11d close the contacts, and the furnace control unit 31 forcibly maintains the open state of the electromagnetic safety valve 11c in accordance with the closing operation of the signal switch 11e. For this reason, the current is energized only for a predetermined time (for example, 20 seconds), and the overheat prevention control is started (step 1), and the ignition electrode is driven by a high voltage generating circuit (not shown) in response to the opening operation of the ignition switch 11d. In 2d, the flame discharge is executed.

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

When the user releases the pressing operation of the ignition and fire extinguishing button 5, the main valve 11b is kept open by the cam mechanism. At this time, the electronic safety valve 11c is energized by a forced current by the condenser. Since the fuel gas is maintained at, the fuel gas is continuously supplied to the go-ro burner 2a.

While the temperature of the thermocouple 2e sufficiently rises, it becomes an ignition detection state based on the output of the thermocouple 2e, and the electromagnetic safety valve 11c is adsorb | sucked continuously and an open state is maintained.

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

Thereafter, when the user operates the switching switch 21b as necessary, the low cut operation mode is set to the high cut operation mode, and the red LED 23b is turned on instead of the green LED 22b being turned off.

Further, if necessary, the release switch 24a is operated (YES in step 2), and the overheat prevention control is released (step 3), so that both the low cut operation mode and the high cut operation mode are released, and at the same time, the temperature sensor 2b. ) Is driven to the lowered position and heated unlimitedly regardless of the detection temperature of the temperature sensor 2b.

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

As a result, the release of the overheat prevention control is forgotten and the number of departures from the gas table 1 is reduced.

Moreover, even if it is separated from the gas table 1, since it informs the buzzer 34 continuously, the gas furnace 2 is not left to be heated as it is.

If the release switch 24a has not been operated in the state where the overheat prevention control is released (NO in step 5), step 3 or less is repeated, and the buzzer 34 is notified continuously after the overheat prevention control is released. .

If the release switch 24a is operated while the overheat prevention control is released (YES in step 5), the control returns to step 1 and the overheat prevention control based on the detection temperature of the temperature sensor 2b is again performed. The low cut operation mode or the high cut operation mode selected by 21b) is shifted.

When the user performs fire extinguishing with the ignition and extinguishing button 5, the main valve 11b is closed by extinguishing the valve, the signal switch 11e opens the contact, and the overheat prevention control is turned off.

The electromagnetic safety valve 11c closes the valve by the output voltage drop of the thermocouple 2e.

As described above, in this embodiment, since the overheat prevention control can be canceled by the release switch, it is possible to easily obtain the necessary heating power, and it is known by the buzzer that the overheat prevention control is released. You can pay attention to it and use it safely.

In the present embodiment, a buzzer sounds to indicate that the overheat prevention control is released. However, a chime bell, a synthesized sound effect, or a voice may be used to inform the user. Moreover, you may inform with light by a lamp.

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

In the second embodiment, as shown in FIG. 5, each of the furnace control sections 31 and 32 flashes the operation only when the overheat prevention control is released by the release switch, and only shows the predetermined time T1. When the operation of the safety timers 31a and 32a is completed, energization by the thermocouples 2e and 3e to the electromagnetic safety valves 11c and 12c is stopped accordingly.

Therefore, in the case where the overheat prevention control is released, when the predetermined time T1 has elapsed from the release, the fuel gas supply to the go furnace burners 2a and 3a irrespective of the detection temperatures of the temperature sensors 2b and 3b. This stops, so combustion is automatically stopped.

At this time, the operating time of the safety timers 31a and 32a is set differently depending on the heating capability of each of the goro burners 2a and 3a, for example, it is set to 5 to 10 minutes.

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

When the user performs the ignition operation with the ignition and fire extinguishing button 5, similarly to the first embodiment described above, the ignition operation is started by a predetermined sequence to start the combustion of the go-ro burner 2a and the overheat prevention control. Start (step 11).

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

In addition, the safety timer 31a starts to operate for a predetermined time T1 (step 14).

Thereafter, it is determined whether or not the predetermined time T1 has elapsed. If the predetermined time T1 has not elapsed (NO in step 15), the step 15 or less is repeated, and is the release switch 24a operated? If the release switch 24a is not operated (NO in step 16), step 15 or less is repeated, and if release switch 24a is operated (YES in step 16), step 11 Go back and perform overheat prevention control again.

When the predetermined time T1 has elapsed (YES in step 5), energization of the electronic safety valve 11c is stopped by the thermocouple 2e, and the fuel supply to the cone burner 2a is stopped and combustion is started. It stops (step 17).

Therefore, it is safe even if you forget to release the overheat protection control.

The following is a modification of the second embodiment, for example, following step 13, as indicated by the dashed-dotted line in FIG. 6, by the temperature sensor 2b, the detection temperature is 250 which is the upper limit temperature in the high cut operation. It is determined whether or not the temperature has been reached (step 20). If the temperature has not reached 250 ° C (NO in step 20), the operation of the safety timer 31a until the temperature reaches 250 ° C without starting operation is determined. Waiting, when it reaches 250 degreeC, it will go to step 14 and let the operation of the safety timer 31a start.

In this case, the operating time of the safety timer 31a needs to be shorter than the predetermined time T1 (5 to 10). For example, the operating time T2 is set to 3 minutes.

In this case, since the temperature detection by the temperature sensor 2b is required, the lifting device of the temperature sensor 2b may be omitted since it is not necessary to lower the temperature sensor 2b to the lowered position.

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

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

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

In this case, when the temperature sensor 2b detects the limit temperature in each cut operation mode after the return, combustion stops and becomes safe because the energization to the electronic safety valve 11c is stopped in the overheat prevention control process. If the limit temperature in each cut operation mode is not detected, cooking can continue.

Further, in the above embodiment, when the overheat prevention control is released, when the release switch 24a is operated, the temperature sensor 2b is raised (step 32), and the overheat prevention control is returned (step 11).

In addition, although the notification by the buzzer 34 was not implemented basically in these embodiments, the notification process by the buzzer 34 may be added.

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

In the fourth embodiment, as shown in FIG. 8, an infrared sensor 35 for transmitting a signal to each of the furnace control units 31 and 32 is provided, and the infrared sensor 35 is shown in FIG. As shown, for example, the user may be installed in the operation panel 20 of the gas table 1 and installed by the infrared sensor 35, for example, in front of or near the gas table 1, which is represented by an oblique line region. Determine if there is any.

The release of the overheat prevention control continues only when the user detects that the gas table 1 is in the teeth, and the control is returned to the overheat prevention control when the user is not detected that the gas table 1 is near.

In this case, the user is mostly around the gas table 1, but since it is likely to fall off the gas table 1 temporarily, for example, to bring seasonings or the like, the user must overheat when not detected. The timers 31b and 32b which time constant t (e.g., 1 minute) are not returned to the preventive control but are returned only when a time for which the user is not detected continues for a predetermined time. Attached to improve the ease of use.

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

When the user performs the ignition operation with the ignition and fire extinguishing button 5, similarly to the first embodiment described above, the ignition operation is performed with predetermined skins, the combustion of the cone burner 2a is started, and the 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 detects whether or not there is a user in the vicinity of the gas table 1, and a person has been detected. In this case (YES in step 23), the overheat protection control is released (step 24). If no person is detected (NO in step 23), the control returns to step 21 to continue the overheat protection control.

Thereafter, it is determined whether or not a person is detected continuously. If a person is detected (YES in step 25), it is determined whether or not the release switch 24a is operated. If there is no operation of the release switch 24a, (NO in step 26), go to step 24, and the release state of overheat prevention control continues, and when the release switch 24a operated (YES in step 26), go to step 21 and perform overheat prevention control again. do.

On the other hand, when a person is not detected in step 25 (NO), the operation of the timer 31b starts (step 27), after which it is determined whether or not the time when the person has not been detected reaches a predetermined time t. (Step 28).

Here, in the case where no person is detected even after 1 minute, which is the operation time of the timer 31b (YES in step 28), the flow goes to step 21, and the overheat prevention control is automatically returned.

Therefore, it is safe to forget to cancel the overheat protection control and automatically return to the overheat protection control even if the user has left the gas table 1.

In other words, the user is considered to be cooking while being close to the gas table 1 during cooking and operates the release switch 24a to perform other work while cooking while the overheat protection is released (e.g., For example, if you leave a gas table to answer a call or a visitor, etc. for a predetermined time or more), the infrared sensor 35 detects it and applies it to the stove control unit 30 so that the stove control unit 30 The internal timer 31b starts to be driven, and if the user is not detected even though 1 minute of the operating time of the timer 31b has elapsed, the release of the overheat protection function thus far is canceled and the overheat protection is automatically performed. Since the control function is activated, safety accidents caused by overheating can be prevented in advance.

Further, until one minute has elapsed (NO in step 28), the person is detected in step 25, and if a person is detected again in the meantime, the counting time of the timer 31b is cleared and is operated simultaneously. It stops, and it is convenient to use because it continues with overheat prevention control of step 24 or less.

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

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 table 1, and if it is determined that a person is not detected (step 23) NO) and the solenoid safety valve 11c are closed, and heating is stopped (step 35).

At the time when the release switch 24a is operated, even if a person is detected and the overheat prevention control is released (step 24), if no person is detected thereafter (NO in step 25), similarly to the fourth embodiment described above. The timer 31b is activated to start the time (step 27). If the person is not detected again even after a predetermined time t has elapsed (YES in step 28), the electronic safety valve 11c is forcibly It closes (step 35), and heating is stopped.

In addition, the infrared sensor 35 may be attached to the wall of the kitchen other than the gas table 1, for example.

In addition, although the infrared sensor is used as the user detecting means in the above embodiment, the presence of the person may be determined by detecting the weight of the person by installing a weight sensor and a pressure sensor on the kitchen floor.

In the above embodiment, the release switch for releasing the overheat prevention control is shown. However, the release method of the overheat prevention control is determined by changing the detection temperature of the temperature sensor or automatically stir-frying it. On the basis of the result of the determination, the overheat prevention control may be released.

In addition, although the temperature sensor was shown to contact a cooking container, you may use the non-contact temperature sensor by infrared rays, and you may make it into a cooking container.

In addition, the overheat prevention function of heating control based on the detection temperature of the temperature sensor is not limited to stopping the heating, but may also weaken the heating power.

Although the example of the above example showed the furnace in a gas table, it may be a furnace in a residue range.

Claims (4)

A control apparatus for a stove comprising a temperature sensor for detecting a temperature of a workpiece, and having a temperature sensor, and having an overheat prevention function for controlling heating based on the detection temperature of the temperature sensor. And an overheat prevention releasing means for releasing, and a notifying means for sounding out that the overheating protection function is released by the overheating releasing means. Control of the furnace. 2. The overheat prevention means for releasing the overheat protection function comprises a timer in which the overheat protection function is operated with respect to the release, and stops heating at the same time as the operation of the timer is finished. Control of the furnace. According to claim 1, wherein the overheat prevention means for controlling the overheat prevention function, the user detection means for detecting the presence of the user around the furnace, the overheat prevention function is released by the overheat prevention release means If the presence of the user is not detected by the user detection means for more than a predetermined time in the overheat prevention function characterized in that the automatic return to the furnace. According to claim 1, wherein the overheat prevention means for releasing the overheat prevention function, the user detection means for detecting the presence of the user around the furnace, the overheat prevention function is released by the overheat prevention release means And the heating apparatus stops the heating when the presence of the user is not detected by the user tethering means for a predetermined time.

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