JP7232139B2 - cooking device - Google Patents

Description

The present invention relates to a heat cooking device.

In a cooking device equipped with a gas burner, if the ignition operation fails due to misfiring or extinction, the fuel gas stays inside and around the burner. Otherwise, there is a risk of explosive ignition in which the stagnant fuel gas is ignited explosively.

Therefore, in such a case, the ignition operation is not performed immediately, but is delayed by a predetermined time from the operation of the ignition switch (see, for example, Patent Document 1).

JP 2016-56994 A

In Patent Document 1, when the ignition operation of the grill burner fails, the ignition operation of the grill burner is performed with a predetermined time delay from the operation of the ignition switch.

However, in a cooking apparatus having a plurality of burners, for example, a cooking apparatus having a grill burner and a stove burner, each ignition plug provided in each of the plurality of burners is electrically connected to a single igniter. If the igniter is connected to the grill burner and the igniter is shared, for example, the ignition operation of the grill burner fails and the ignition switch of the stove burner is turned off during the waiting period in which the operation of the ignition switch of the grill burner is delayed by a predetermined time. If is operated, since the igniter is shared, spark discharge is also generated in the grill burner, and there is a risk that the grill burner will explode and ignite.

SUMMARY OF THE INVENTION The present invention has been made in view of the above points, and it is an object of the present invention to prevent explosive ignition of other burners other than the burner concerned during the ignition operation of the burner.

In order to achieve the above object, the present invention is configured as follows.

(1) In the heat cooking apparatus according to the present invention, a plurality of heating burners for cooking, a plurality of ignition plugs respectively arranged in the plurality of heating burners for cooking, and the plurality of ignition plugs are electrically connected. a shared igniter, a safety device corresponding to each of the plurality of cooking heating burners, a fire extinguishing command means for commanding the lighting and extinguishing of the plurality of cooking heating burners, and the plurality of cooking heating burners and a combustion control means for controlling the ignition and extinguishing of the plurality of cooking heating burners based on the command of the ignition and extinguishing command means and the state of the safety device,
The combustion control means is in a state in which the extinction safety device corresponding to at least one heating burner for cooking among the plurality of heating burners for cooking detects extinction, or a state in which extinction may be detected. When there is an ignition command to the cooking burners other than the at least one cooking burner, the other cooking burners are ignited with a predetermined time delay from the time of the ignition command. perform ignition.

Since the plurality of ignition plugs arranged in the plurality of heating burners for cooking are electrically connected to a common igniter, in order to ignite any one of the plurality of heating burners for cooking, , when the common igniter is driven (turned on), spark discharge also occurs in the ignition plugs of the other heating burners for cooking.

According to the present invention, in a state in which the extinction safety device corresponding to at least one cooking burner out of the plurality of cooking burners detects the extinction or may detect the extinction, this When there is an ignition command to a cooking heating burner other than the cooking burner which is detecting the extinction or may detect the extinction, a predetermined time from the time when the ignition command is issued. Since the other heating burner for cooking is ignited with a delay, at the time when the other heating burner for cooking is ignited, there is a possibility that the extinction is detected or that the extinction is detected. The fuel gas that has accumulated inside or around at least one heating burner for cooking in a certain state has already diffused into the air and is discharged to the outside. Explosive ignition of the burner can be avoided.

(2) In the heat cooking apparatus according to the present invention, a plurality of heating burners for cooking, a plurality of ignition plugs respectively arranged in the plurality of heating burners for cooking, and the plurality of ignition plugs are electrically connected. a shared igniter, a safety device corresponding to each of the plurality of cooking heating burners, a fire extinguishing command means for commanding the lighting and extinguishing of the plurality of cooking heating burners, and the plurality of cooking heating burners and a combustion control means for controlling the ignition and extinguishing of a plurality of cooking heating burners based on the command of the ignition and extinguishing command means and the state of the safety device,
The combustion control means is in a state in which the extinction safety device corresponding to at least one heating burner for cooking among the plurality of heating burners for cooking detects extinction, or a state in which extinction may be detected. When there is an ignition command to the cooking burners other than the at least one cooking burner, the other cooking burners are not ignited regardless of the ignition command.

Since the plurality of ignition plugs arranged in the plurality of heating burners for cooking are electrically connected to a common igniter, in order to ignite any one of the plurality of heating burners for cooking, , when the shared igniter is driven, spark discharge is also generated in the spark plugs of the other cooking heating burners.

According to the present invention, in a state in which the extinction safety device corresponding to at least one cooking burner out of the plurality of cooking burners detects the extinction or may detect the extinction, this When there is an ignition command to a heating burner for cooking other than the heating burner for cooking which is detecting or is likely to be detected to go out, regardless of the ignition command, the other Since ignition of the heating burners for cooking is not performed, spark discharge does not occur in the ignition plug of at least one heating burner for cooking in a state in which extinction is detected or in a state in which extinction may be detected. , explosive ignition does not occur.

(3) In the preferred embodiment of (1) above, the combustion control means detects the possibility that the safety device will go out, and the safety device will go out in the standby state in which the safety device is delayed for the predetermined time. is detected, execution of ignition of the other cooking heating burner is delayed until at least the operation of the safety device is completed.

According to this embodiment, during the waiting period during which the execution of the ignition command to the other heating burner for cooking is delayed for a predetermined period of time on the grounds that there is a possibility that the failure safety device will detect failure, the "possibility of detection of failure" is performed. When the state is changed from the state of "existing" to the state of "extinguishing detection", until the operation of the safety device is completed, that is, at least until the supply of fuel gas to the heating burner for cooking whose extinction is detected is cut off. Since the execution of ignition of the other heating burners for cooking is delayed, the supply of fuel gas to the heating burner for cooking that has been detected to go out has already been cut off at the time of executing the ignition of the other heating burners for cooking. As a result, it is possible to effectively avoid the explosive ignition of the cooking heating burner whose extinction has been detected.

(4) In the preferred embodiment of (2) above, the ignition/extinguishing command means is an intermittent combustion cooking method that repeats the first ignition command by the ignition operation of the operation unit and the ignition state and the extinguishing state of the cooking heating burner. The combustion control means commands the second ignition command by executing the above, and the combustion control means detects that the extinction safety device corresponding to at least one cooking heating burner among the plurality of cooking heating burners is extinguished. one of the first ignition command and the second ignition command to the at least one cooking heating burner other than the at least one cooking heating burner in a state where the cooking burner is on or in a state where there is a possibility of detecting the extinction when there is an ignition command, regardless of the one ignition command, the other cooking heating burner is not ignited, and the first ignition command and the second ignition command for the other cooking heating burner When there is another ignition command among the commands, the cooking burner is ignited with a predetermined time delay from the time of the other ignition command.

The ignition command of the ignition/extinguishing command means includes a first ignition command by the user's ignition operation of the operation unit, and an internal internal command by execution of intermittent combustion cooking that repeats the ignition state and extinguishing state of the heating burner for cooking. There is a second ignition command.

According to this embodiment, when the ignition command to the other cooking heating burner is one of the first ignition command and the second ignition command, the other cooking burner is fired regardless of the one ignition command. Since the ignition of the heating burner for cooking is not executed, the explosive ignition of at least one heating burner for cooking in the state in which the extinction is detected or the state in which the extinction may be detected does not occur. Further, when the ignition command to the other heating burner for cooking is the other ignition command of the first ignition command and the second ignition command, the timing of the other ignition command is delayed by a predetermined time, and the other ignition command is delayed. Since the ignition of the heating burners for cooking is performed, it is possible to avoid explosive ignition of at least one heating burner for cooking in a state in which extinction is detected or in a state in which extinction may be detected.

(5) In another embodiment of the above (1) or (3), the ignition/extinguishing command means provides the first ignition command by the ignition operation of the operation unit, and the ignition state and the extinction state of the heating burner for cooking. The combustion control means commands a second ignition command by executing intermittent combustion cooking that repeats The first ignition command or the second ignition to the heating burner for cooking other than the at least one heating burner for cooking in a state in which the extinction is detected or in a state in which the extinction may be detected. When there is a command, the other cooking heating burner is ignited with a delay of the predetermined time from the time when the ignition command is issued.

According to this embodiment, regardless of whether the ignition command to the other cooking heating burner is the first ignition command or the second ignition command, the ignition command is delayed by a predetermined time from the time of the ignition command, and the other cooking burner is Since the ignition of the heating burners for cooking is performed, it is possible to avoid explosive ignition of at least one heating burner for cooking in a state in which extinction is detected or in a state in which extinction may be detected.

(6) In still another aspect of the present invention, the plurality of heating burners for cooking includes a stove burner and a grill burner, and the safety device for extinguishing is provided for each of the plurality of heating burners for cooking. a plurality of flame detection sensors; safety valves for opening and closing gas flow paths to the plurality of cooking heating burners; and a lighting detection unit for detecting the lighting, and controls opening and closing of the safety valve based on the detection result of the lighting detection unit.

According to this embodiment, if a stove burner or grill burner is extinguished, the extinguishment safety device closes the safety valve in the gas flow path to the extinguished burner to prevent the release of unburned fuel gas. can.

(7) In another embodiment of (6) above, the flame detection sensor is a thermocouple, and the extinction detector detects the flame extinction when the electromotive force of the thermocouple is equal to or less than a predetermined value. Then, when the slope of the drop in the electromotive force per fixed time becomes larger than a predetermined slope of the drop, it is detected that there is a possibility of extinction.

According to this embodiment, it is possible not only to detect the extinction, but also to detect the possibility of the extinction based on the slope of the decrease in the electromotive force of the thermocouple per certain period of time.

Thus, according to the present invention, the state in which the safety device corresponding to at least one heating burner for cooking out of the plurality of heating burners for cooking is detecting the extinction, or the possibility of detecting the extinction. In a certain state, when there is an ignition command to a cooking burner other than the cooking burner which is detecting this extinction or may detect extinction, the ignition command is issued. Since the other cooking heating burner is ignited after a predetermined time delay from the point in time, at least one cooking heating is in a state where extinction is detected or a state where extinction may be detected. Explosive ignition of the burner can be avoided.

Alternatively, the extinction is detected in a state in which the extinction safety device corresponding to at least one of the plurality of cooking heating burners detects the extinction or may detect the extinction. or when there is an ignition command to a cooking burner other than the cooking burner in a state where there is a possibility of detecting the extinction, regardless of the ignition command to the other cooking burner , since the other cooking burners are not ignited, spark discharge occurs in the ignition plug of at least one cooking burner in a state in which extinction is detected or in a state in which extinction may be detected. No explosive ignition occurs.

FIG. 1 is a perspective view of a gas stove with a grill according to one embodiment of the present invention. FIG. 2 is a schematic configuration diagram of the gas stove with grill of FIG. FIG. 3 is a flow chart showing control for retarding ignition. FIG. 4 is a flow chart showing an example of ignition and combustion control continued from FIG. FIG. 5 is a flow chart showing another example of ignition and combustion control following FIG. FIG. 6 is a flow chart showing control for restraining ignition. FIG. 7 is a schematic configuration diagram of a gas stove according to another embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

In this embodiment, a gas stove with a grill is applied as a cooking apparatus.

FIG. 1 is a perspective view of a gas stove A with a grill according to one embodiment of the present invention. This gas stove A with a grill is provided with three stove burners 2a to 2c having different maximum heating powers as heating burners for cooking on the upper part of the stove main body 1.例文帳に追加Furthermore, the gas stove with grill A has a grill burner (not shown) as a heating burner for cooking in the left and right center of the stove body 1, and a grill plate (not shown) provided with a grill door 3a in front from the front. It is provided with a grill part 3 which is attached so as to be able to be put in and taken out.

A gas stove A with a grill of this embodiment is a built-in type that is dropped into a kitchen cabinet (not shown).

The upper part of the stove main body 1 is covered with a top plate 4, and a grill exhaust port 5 for discharging the combustion exhaust gas of the grill part 3 is provided on the upper surface at the rear end of the stove.

In this embodiment, one (left side) of the stove burners 2a and 2b arranged on the left and right sides of the front side of the top plate 4 is a standard heating power stove burner 2a, and the other (right side) is a high heating power stove. burner 2b. In addition, the stove burner 2c arranged in the central part on the far side is a stove burner 2c with a small heating power. Each stove burner 2a-2c is equipped with a temperature sensor 7a-7c such as a thermistor for detecting the temperature of the bottom of a cooking vessel, for example, a pan, and corresponding trivets 6a-6c are mounted, respectively. there is

On the left and right upper parts of the front surface of the stove main body 1, there are provided three heating condition adjusting sections 8a to 8c for performing operations of ignition, extinguishing, and heating power adjustment of the stove burners 2a to 2c, respectively. In this embodiment, the heating condition adjusting portion 8a of the standard heating power stove burner 2a is arranged on the left side of the front surface, and the heating condition adjusting portion 8b of the high heating power stove burner 2b and the low heating power stove burner are arranged on the right side of the front surface. 2c is provided with a heating state control unit 8c.

Further, on the upper right portion of the front surface, there is provided an automatic return type push-button type power switch 9 for turning on/off power supply to each part.

Each of the heating state adjusting units 8a to 8c is configured by a push button that is movable in the front-rear direction. When using the stove burners 2a to 2c, the heating state adjusting units 8a to 8c made up of push buttons are pressed to ignite. As a result, the retracted heating condition adjusting portions 8a-8c protrude forward to turn on the device plug, and the gas fuel flowing out is spark-discharged to ignite the stove burners 2a-2c.

When the heating state adjusting portions 8a to 8c, which are push buttons, protrude forward and are rotated by pinching the heating state adjusting portions 8a to 8c with fingers, the heating power of the stove burners 2a to 2c can be adjusted. there is On the other hand, when extinguishing the fire, the heating state adjusting portions 8a to 8c protruding forward are pushed backward to turn off the appliance plugs and extinguish the stove burners 2a to 2c.

Operation panels 10 and 11 are storably provided on the left and right lower portions of the front surface of the stove main body 1 . A right operation panel 11 is provided with a grill cooking setting input section 12 for performing operations related to the grill section 3, and this operation panel 11 serves as a grill-side operation panel. Further, the left operation panel 10 is provided with a gas stove cooking setting input section 13 for inputting cooking settings for the stove burners 2a to 2c, and this operation panel 10 serves as a stove-side operation panel.

With the grill cooking setting input section 12 and the gas stove cooking setting input section 13, it is possible to set automatic cooking by the grill section and the stove burners 2a to 2c. This automatic cooking includes automatic cooking in which the heating power of the burner is switched to control the temperature within a certain temperature range, and low-temperature automatic cooking by intermittent combustion in which the burning state and extinguishing state of the burner are repeated.

FIG. 2 is a schematic configuration diagram of the gas stove A with a grill in FIG. 1, and parts corresponding to those in FIG. 1 are given the same reference numerals.

Each stove burner 2a-2c is provided with ignition plugs 14a-14c for igniting the stove burners 2a-2c and thermocouples 15a-15c as flame detection sensors for detecting ignition. Each of the stove burners 2a to 2c is provided with the temperature sensors 7a to 7c for detecting the temperature of the bottom of the cooking vessel 19, for example, the pan, as described above.

Similarly, the grill section 3 is provided with ignition plugs 17a and 17b for igniting the upper and lower grill burners 16a and 16b, and thermocouples 18a and 18b as flame detection sensors for detecting ignition of the grill burners 16a and 16b. be provided. A temperature sensor 21 such as a thermistor for detecting the temperature of the bottom of the grill pan 20 is also provided.

In this embodiment, the ignition plugs 14a-14c, 17a, 17b of each stove burner 2a-2c and each grill burner 16a, 16b are electrically connected to an igniter 22 as an igniter, and the igniter 22 is connected to each stove. It is shared by the burners 2a to 2c and the grill burners 16a and 16b.

Since the ignition plugs 14a to 14c, 17a and 17b of all the burners 2a to 2c, 16a and 16b share the igniter 22 in this manner, by driving (turning on) the igniter 22, all the burners 2a Spark discharge occurs at the spark plugs 14a-14c, 17a, 17b of .about.2c, 16a, 16b.

To the stove burners 2a to 2c and the grill burners 16a and 16b are connected branch supply passages 24 to 27 branching off from a fuel supply passage 23 for supplying gas fuel such as city gas.

A main solenoid valve 28 is provided in the fuel supply path 23 . Flow control valves 29 to 32, which are motor valves capable of finely adjusting the opening of the valve body driven by a stepping motor for adjusting the amount of gas fuel supplied, and Rotation angle sensors 33 to 36 are provided to detect the opening of the valve body. Each of the flow rate control valves 29-32 has a function as a safety valve for shutting off the gas fuel supply path when each of the burners 2a-2c, 16a, 16b goes out.

The branch supply passage 27 for the grill burners 16a and 16b is provided with a governor 37 for adjusting the supply pressure of gas fuel to a set pressure.

A controller 40 consisting of a microcomputer has thermocouples 15a to 15c, 18a and 18b as flame detection sensors for detecting ignition of the burners 2a to 2c, 16a and 16b, and outputs of temperature sensors 7a to 7c and 21. Also, the output of each rotation angle sensor 33-36 of the flow control valves 29-32 is given.

Further, the control unit 40 receives an operation input from a manual operation unit 42 including the heating state adjusting units 8a to 8c, the grill cooking setting input unit 12, the gas stove cooking setting input unit 13, and the like.

The control unit 40 controls each burner based on the operation input from the manual operation unit 42, the thermocouples 15a to 15c, 18a, 18b, the temperature sensors 7a to 7c, 21, and the rotation angle sensors 33 to 36. It has a function as combustion control means for controlling ignition and combustion of 2a to 2c, 16a and 16b.

In addition, the control unit 40 instructs the burners 2a to 2c, 16a, and 16b to switch on and off in accordance with the user's operation to switch on and off, and also commands to switch on and off during intermittent combustion during low-temperature automatic cooking. It has a function as a fire extinguishing command means.

Basically, when ignition is commanded, the control unit 40 supplies fuel gas to the commanded burners 2a to 2c, 16a, 16b, and the corresponding thermocouples 15a to 15c, 18a, 18b control the ignition state. Ignition processing is executed to control the igniter 22, the main solenoid valve 28, and the corresponding flow control valves 29-32 so as to perform the ignition operation until it is detected. Further, the control unit 40 is configured to stop the supply of fuel gas to the burners 2a to 2c, 16a, 16b for which the command is given to extinguish the fire.

The ignition commands for the burners 2a to 2c, 16a, and 16b include a first ignition command, which is an ignition command by the user operating the heating state adjustment units 8a to 8c or the grill cooking setting input unit 12, and a burner There is a second ignition command which is a re-ignition command by execution of low-temperature automatic cooking of intermittent combustion in which the combustion state and extinguishing state of 2a to 2c, 16a and 16b are repeated. In addition, the fire extinguishing command includes a fire extinguishing command when the user operates the heating state adjusting units 8a to 8c or the grill cooking setting input unit 12, a fire extinguishing command when the set cooking time for automatic cooking has elapsed, and a burner There is a fire extinguishing command by execution of low temperature automatic cooking of intermittent combustion that repeats the burning state and extinguishing state of 2a to 2c, 16a and 16b.

The control unit 40 supplies fuel gas to the corresponding burner by manual ignition operation in the heating state adjustment units 8a to 8c and the grill cooking setting input unit 12, turns on the shared igniter 22, and ignites the spark plugs 14a to 8c. A spark discharge is generated at 14c, 17a and 17b to ignite the corresponding burner. In addition, in the automatic low-temperature cooking described above, intermittent combustion is performed by repeating the combustion state and extinguishing state of the burner. is turned on to generate spark discharge in the spark plugs 14a to 14c, 17a and 17b to re-ignite the corresponding burners.

In addition, the control unit 40, together with the thermocouples 15a to 15c, 18a, 18b and the flow control valves 29 to 32, detects the extinction of the burners 2a to 2c, 16a, 16b, and supplies the fuel gas. It constitutes a safety device that cuts off the paths 24-27.

That is, the control unit 40 monitors the electromotive force of the thermocouples 15a to 15c, 18a, 18b corresponding to the burners 2a to 2c, 16a, 16b in the burning state, and when the electromotive force becomes equal to or less than a predetermined value, A blackout is detected, and the corresponding flow control valves 29 to 32 are closed to cut off the supply of fuel gas.

Further, the control unit 40 determines that the slope of the decrease per fixed time of the electromotive force of the thermocouples 15a to 15c, 18a, 18b corresponding to the burners 2a to 2c, 16a, 16b in the combustion state is larger than the predetermined slope. It sometimes detects that there is a possibility of going out, and it has a function as a going out detection unit that detects the possibility of going out as well as detecting going out.

The control unit 40 notifies an error state or the like, which will be described later, by controlling a notification unit (not shown) with an electronic sound and blinking the combustion lamps around the heating state adjusting units 8a to 8c.

In this embodiment, the following measures are taken to prevent explosive ignition of other burners other than the burner concerned during the ignition operation of the burner.

That is, the control unit 40 detects the extinction of at least one burner among the burners 2a to 2c, 16a, and 16b, or detects the extinction in a state in which the extinction may be detected. Alternatively, when there is an ignition command to a burner other than at least one heating burner for cooking in a state where there is a possibility of detecting the extinction, the other burner is delayed by a predetermined time from the time of the ignition command. of burner ignition.

Next, the control for delaying the ignition, the subsequent ignition processing, etc. will be described based on the flow charts of FIGS. 3 and 4. FIG.

3 and 4 show an example of automatic cooking other than manual cooking or intermittent combustion, that is, automatic cooking in which the heating power is switched to control the temperature within a certain temperature range.

First, as shown in FIG. 3, when there is an ignition command by the user's ignition operation, for example, an ignition command for the stove burner 2a with standard heating power (step S1), other burners 2b other than the burner 2a for which the ignition command was issued , 2c, 16a, 16b, that is, whether or not the other burners 2b, 2c, 16a, 16b are under combustion control (step S2). When the control is not in progress, the process proceeds to the ignition operation process (step S7) in FIG.

In step S2, when the other burners are under combustion control, whether or not the extinction safety device of at least one burner among the other burners under combustion control is in operation. At least one burner is detected to have gone out, and it is determined whether or not the corresponding flow control valve is closed to cut off the supply of fuel gas (step S3).

Here, assuming that at least one burner among the other burners under combustion control is, for example, the high-power stove burner 2b, in step S3, it is determined whether or not the safety device for the at least one burner 2b is in operation. (step S3).

When the safety device is in operation, the ignition operation of the stove burner 2a with standard thermal power for which the ignition command was issued is delayed for a first predetermined time, for example, 10 seconds, and the control unit 40 outputs, for example, "Beep, beep, An electronic sound "beep" and flashing of the combustion lamp are given to notify that the ignition operation is being delayed, and the process returns to step S2 (step S4). It is preferable that the first predetermined time is longer than the time from when the safety device detects the failure to when the supply of fuel gas to the corresponding burner is cut off.

In step S3, when it is determined that the safety device for at least one burner 2b among the other burners under combustion control is not in operation, whether there is a possibility of detecting the extinction of the at least one burner 2b. Specifically, it is determined whether or not the slope of the decrease in the electromotive force of the thermocouple 15b of the at least one burner 2b per fixed time period is greater than a predetermined slope (step S5). If not, the ignition operation process (step S7).

When it is determined in step S5 that the slope of the decrease in the electromotive force of the thermocouple 15b of at least one of the other burners 2b among the other burners under combustion control is greater than a predetermined slope, extinction is detected. There is a possibility that the ignition operation is delayed for a second predetermined time, for example, 3 seconds, and an electronic sound such as "beep, beep, beep" or a combustion lamp is flashed to indicate that the ignition operation is being delayed. , and returns to step S2 (step S6). The reason why the second predetermined time is set shorter than the first predetermined time in step S4 is that there is a possibility that the blackout may be detected. This is because the system shifts to the operation of the safety device for disappearing.

In this way, when there is an ignition command by the user's ignition operation, at least one burner out of the burners for which the ignition command was issued, for example, other burners under combustion control than the stove burner 2a with the standard heating power, For example, when the safety device for the burner 2b of high heating power is in operation, or when there is a possibility of detecting the extinction of the burner 2b, the ignition operation of the burner 2a for which the ignition command was issued is delayed for a predetermined time. At the time of executing the ignition of the burner 2a with the above, the fuel gas staying inside and around the at least one burner 2b has already diffused into the air, and the explosive ignition of the at least one burner 2b is avoided. can do.

FIG. 4 is a flow chart of ignition and combustion control following FIG.

As shown in FIG. 4, first, an ignition operation is performed. Specifically, when the main solenoid valve 28 is closed, the main solenoid valve 28 is opened, and the flow rate control valve 29 of the burner for which the ignition command is issued, for example, the standard heating power stove burner 2a, is set to the ignition heating power position, and the igniter 22 is turned ON to ignite (step S7), and the process proceeds to step S8.

In this step S7, when the igniter 22 is turned on, spark discharge occurs at the ignition plugs 14a-14c, 17a, 17b of all the burners 2a-2c, 16a, 16b. At least one burner that is in combustion control and the safety device is operating or that may detect the extinction, for example, the high-power stove burner 2b, the fuel that has accumulated inside or around it The gas has already diffused into the air and can avoid explosive ignition of the high-power stove burner 2b as described above.

In step S8, it is determined whether or not the electromotive force V of the thermocouple 15a of the ignited burner 2a is equal to or greater than a predetermined electromotive force Vk, that is, whether or not ignition has been detected. , the process advances to step S16 to determine whether or not the period during which no ignition is detected has reached a certain period of time, for example, 10 seconds or more, that is, whether or not the time has expired. If the time has not expired, the process returns to step S8, When the time is up, it is determined that there is a misfire error, for example, an electronic sound of "beep, beep, beep" or a combustion lamp is flashed, and the process proceeds to step S14 (step S17).

In step S8, when ignition is detected, the igniter 22 is turned off (step S9), and whether or not the electromotive force V of the thermocouple 15a of the ignited burner 2a is less than the predetermined electromotive force Vk, that is, the burner 2a is extinguished. (step S10), and when it goes out, the process proceeds to step S15, and it is determined that there is an error in the middle of extinguishing, for example, an electronic sound of "beep, beep, beep" or a combustion lamp is flashed, and step S10 is performed. Move to S14.

In step S10, if the electromotive force V of the thermocouple 15a of the ignited burner 2a is not less than the predetermined electromotive force Vk, that is, if the burner 2a is not extinguished, whether or not there is a thermal power switching command by manual operation or automatic cooking by the user. is determined (step S11), and when there is no thermal power switching command, the process proceeds to step S13.

In step S11, when there is a thermal power switching command, the opening degree of the flow control valve 29, which is the corresponding motor valve, is adjusted so as to achieve the commanded thermal power (step S12), and the process proceeds to step S13.

In step S13, it is determined whether or not there is a fire extinguishing command due to the user's manual operation or the lapse of the set cooking time for automatic cooking. Specifically, when the igniter 22 is not turned off, the igniter 22 is turned off, and when combustion control of other burners is not being performed, the main electromagnetic valve 28 is closed and the flow control valve 29 is set to the closed position. Terminate (step S14).

Next, the case of automatic low-temperature cooking with intermittent combustion in which the burner burns and extinguishes repeatedly will be described with reference to the flow chart of FIG.

This FIG. 5 shows the subsequent ignition and combustion control processing of the flow chart of FIG. Note that the ignition command in step S1 of FIG. 3 includes a re-ignition command for execution of automatic cooking with intermittent combustion in addition to the above-described ignition command by the user's ignition operation.

That is, even if there is an internal re-ignition command due to the execution of automatic cooking with intermittent combustion, as shown in FIG. Therefore, when the safety device for at least one burner out of the other burners is in operation, or when there is a possibility of detecting the extinction, the ignition operation of the burner for which the ignition command has been issued is delayed for a predetermined time. , the explosive ignition of the at least one burner other than the burner for which the ignition command was given can be avoided.

In FIG. 5 following FIG. 3, the ignition operation is first performed. Specifically, when the main solenoid valve 28 is closed, the main solenoid valve 28 is opened, and if there is an ignition command for the burner with the ignition command, for example, the standard heating power stove burner 2a, the standard heating power stove burner The flow rate control valve 29 of 2a is set to the ignition heating power position, the igniter 22 is turned on to ignite (step S100), and the process proceeds to step S101.

In this step S100, when the igniter 22 is turned on, spark discharge occurs at the ignition plugs 14a-14c, 17a, 17b of all the burners 2a-2c, 16a, 16b. In the case of a burner, such as a high-powered stove burner 2b, in which a safety device is in operation during combustion control, or which may detect the extinction, for example, the fuel gas stagnating inside or around the burner is It has already diffused into the air, and as described above, it is possible to avoid the explosive ignition of the high-power stove burner 2b.

In step S101, it is determined whether or not the electromotive force V of the thermocouple 15a of the ignited burner 2a is equal to or greater than a predetermined electromotive force Vk, that is, whether or not ignition has been detected. Then, the process proceeds to step S118, where it is determined whether or not the period during which no ignition is detected has exceeded a predetermined period, that is, whether or not the time has expired. A non-ignition error is notified by, for example, an electronic sound of "beep, beep, beep" or a combustion lamp is flashed, and the process proceeds to step S110 (step S119).

In step S101, when ignition is detected, the igniter 22 is turned off (step S102), and whether or not the electromotive force V of the thermocouple 15a of the ignited burner 2a is less than the predetermined electromotive force Vk, that is, the burner 2a has gone out. (step S103), and when it goes out, the process proceeds to step S120, and it is determined that there is an error in the middle of extinguishing, for example, an electronic sound of "beep, beep, beep" or flashing of the combustion lamp is given, and step S120 is performed. Go to S110.

In step S103, when the electromotive force V of the thermocouple 15a of the ignited burner 2a is not less than the predetermined electromotive force Vk, that is, when the burner 2a is not extinguished, the temperature T detected by the temperature sensor 7a corresponding to the ignited burner 2a is It is determined whether or not the set temperature Ts for low temperature cooking, for example, 60° C. or higher (step S104). A flow control valve 29 is closed to stop the supply of fuel gas to extinguish the fire, and the process proceeds to step S106 (step S105).

In step S106, it is determined whether or not the temperature T detected by the temperature sensor 7a is lower than the set temperature Ts by a certain temperature, for example, 2°C lower than 58°C. If the temperature is less than 58° C., it is determined whether or not the burner 2a is in combustion (step S107).

In step S108, it is determined whether or not the cooking time t for low-temperature cooking has reached the set cooking time ts, for example, 180 minutes or longer. Specifically, when the igniter 22 is not turned off, the igniter 22 is turned off, and when combustion control of other burners is not being performed, the main electromagnetic valve 28 is closed and the flow rate control valve 29 is closed to end the operation. .

In step S108, if the set cooking time ts has not yet been reached, it is determined whether or not a fire extinguishing command has been issued (step S109). back to

Also, when it is determined that the burner 2a is not burning in step S107, the process proceeds to step S111. In step S111, the ignition delay control process shown in FIG. 3 is executed on the assumption that there is an ignition command for re-ignition of the burner 2a.

After this ignition delay control process, in step S112, the ignition operation of the burner 2a is performed. Position, the igniter 22 is turned ON to ignite, and the process proceeds to step S113.

In step S113, it is determined whether or not the electromotive force V of the thermocouple 15a of the ignited burner 2a is equal to or greater than a predetermined electromotive force Vk, that is, whether or not ignition has been detected. Then, the process proceeds to step S116, where it is determined whether or not the period during which no ignition is detected has exceeded a predetermined period, that is, whether the time has expired. If the time has not expired, the process returns to step S113. A non-ignition error is notified by, for example, an electronic sound of "beep, beep, beep" or by blinking a combustion lamp, and the process proceeds to step S110 (step S117), fire extinguishing operation is performed, and the process ends.

When ignition is detected in step S113, the igniter 22 is turned off (step S114), the flow control valve 29, which is a motor valve, is adjusted to weaken the heating power (step S115), and the process returns to step S103.

In this way, even in the intermittent combustion low-temperature automatic cooking in which the burner's combustion state and extinguishing state are repeated, when there is an ignition command by executing low-temperature automatic cooking, the burner that has the ignition command, for example, the standard heating power When other burners other than the stove burner 2a are under combustion control, and at least one burner among the other burners, for example, the burner burner 2b with high power is in operation, or when the burner goes out. When there is a possibility of detection, the ignition operation of the burner 2a for which the ignition command was issued is delayed for a predetermined time. The fuel gas that has accumulated in the air is diffused in the air, and the explosive ignition of the burner 2b can be avoided.

In the above embodiment, the control unit 40 detects the extinction of at least one burner among the burners 2a to 2c, 16a, and 16b, or in a state in which the extinction of the at least one burner may be detected. When there is an ignition command for a burner other than a burner, the other burner is ignited with a predetermined time delay from the time when the ignition command is issued, but this is another embodiment of the present invention. , in a state in which extinction of at least one burner among the burners 2a to 2c, 16a, and 16b is detected, or in a state in which extinction may be detected, a burner other than the at least one burner is detected. When there is an ignition command, the other burners may not be ignited regardless of the ignition command.

FIG. 6 is a flow chart showing the ignition processing of this other embodiment, and is a flow chart corresponding to FIG. 3 above.

In FIG. 6, in a state in which extinction of at least one burner among the burners 2a to 2c, 16a, and 16b is detected, or in a state in which extinction may be detected, another burner other than the at least one burner is detected. When the ignition command to the burner is the first ignition command by the user's ignition operation, regardless of the first ignition command, the ignition restraining process is performed so that the other burners are not ignited. When the ignition command is the second ignition command by executing low-temperature cooking with intermittent combustion,
Ignition delay processing is performed to delay the ignition of the other burner by a predetermined time from the time when the second ignition command is issued.

As shown in FIG. 6, first, when there is an ignition command (step S200), it is determined whether or not the ignition command is the ignition command by the user's ignition operation, that is, the first ignition command (step S201). ), when the ignition command is the first ignition command by the user's operation, the process proceeds to step S202, and when it is not the ignition command by the user's operation, i.e., a re-ignition command in executing low-temperature automatic cooking by intermittent combustion That is, when it is the second ignition command, the process proceeds to step S207.

In step S202, it is determined whether or not combustion control is being performed for burners other than the burner for which the ignition command has been issued. Move to combustion control processing.

In step S202, when other burners are under combustion control, it is determined whether or not a safety device for at least one of the other burners under combustion control is in operation (step S203), When the blackout safety device is in operation, an ignition check process is performed in which the ignition process is not executed regardless of the first ignition command. The process is notified and the process ends (step S204).

When it is determined in step S203 that the safety device for at least one burner out of the other burners is not in operation, whether or not there is a possibility of detecting the extinction of the at least one burner. It is determined whether the slope of the decrease in the electromotive force of the thermocouple of the at least one burner per certain time is greater than a predetermined slope (step S205), and if not greater than the predetermined slope, the at least one burner is not operating, and there is no possibility of detecting the extinction, the ignition and combustion control process shown in FIG. 5, for example, is performed.

In step S205, when it is determined that the slope of the decrease in the electromotive force of the thermocouple of the at least one burner per fixed time period is larger than a predetermined slope, it is determined that there is a possibility of detecting the extinction, and the first ignition command is issued. Irrespective of this, the ignition restraining process is performed without executing the ignition, for example, an electronic sound of "beep, beep, beep" or a combustion lamp is flashed to notify that the ignition restraining process is in effect, and the process ends (step S206).

In step S207, it is determined whether or not the ignition command is the second ignition command for execution of low-temperature automatic cooking with intermittent combustion, and combustion control is being performed for burners other than the burner for which the second ignition command was issued. If the other burner is not under combustion control, for example, the ignition and combustion control process shown in FIG. 5 is performed.

In step S208, it is determined whether or not the extinction safety device of at least one burner among the other burners under combustion control is in operation. In addition to delaying the ignition operation for a period of time, for example, 10 seconds, for example, an electronic sound of "beep, beep, beep" or a combustion lamp is flashed to notify that the ignition operation is being delayed, and the process returns to step S207 (step S207). S209).

When it is determined in step S208 that the safety device for at least one burner out of the other burners under combustion control is not in operation, whether or not there is a possibility of detecting the extinction of the at least one burner is determined. Specifically, it is determined whether or not the slope of the decrease in the electromotive force of the thermocouple of the at least one burner per fixed time is greater than a predetermined slope (step S210). At least one burner extinguishment safety device is not activated, and there is no possibility of detecting an extinguishment, and the process proceeds to the ignition and combustion control process of FIG. 5, for example.

When it is determined in step S210 that the slope of the decrease in the electromotive force of the thermocouple of at least one of the other burners among the other burners under combustion control is greater than a predetermined slope, there is a possibility of detecting the extinction. Assuming that there is, the ignition operation is delayed for a second predetermined time, for example, 3 seconds, and the ignition operation is delayed by blinking an electronic sound such as "beep, beep, beep" and a combustion lamp. After reporting, the process returns to step S207 (step S211).

As described above, in this embodiment, when there is a first ignition command by the user's ignition operation, the burners other than the burner for which the first ignition command was given are in combustion control, and the other burners are When at least one safety device is in operation, or when there is a possibility of detecting the extinction, the burner with the first ignition command is not ignited regardless of the first ignition command. Explosive ignition of the at least one burner does not occur.

Further, when there is a second ignition command due to the execution of low-temperature automatic cooking with intermittent combustion, the burners other than the burner for which the second ignition command was issued are under combustion control, and among the other burners, When the extinction safety device of at least one burner of is in operation, or when there is a possibility of detecting extinction, the ignition operation of the burner for which the second ignition command is issued is delayed for a predetermined time. The fuel gas remaining inside or around the at least one burner diffuses into the air, making it possible to avoid explosive ignition of the at least one burner other than the burner for which the second ignition command was issued.

In the embodiment of FIG. 6, in the case of the first ignition command by the user's operation, regardless of the first ignition command, the ignition restraining process that does not execute ignition is performed, and the low temperature automatic cooking of intermittent combustion is executed. In the case of the second ignition command, ignition delay processing is performed to delay the ignition operation. However, as another embodiment of the present invention, the ignition operation is delayed in the case of the first ignition command operated by the user. Ignition delay processing may be performed, and in the case of the second ignition command for execution of low-temperature automatic cooking with intermittent combustion, ignition check processing may be performed in which ignition is not performed.

Further, as another embodiment of the present invention, when the ignition command is either the first ignition command by the user's operation or the second ignition command by executing the low temperature automatic cooking of intermittent combustion, Irrespective of the first and second ignition commands, an ignition restraining process may be performed in which ignition is not executed.

Further, as another embodiment, the ignition delay processing is executed only for the ignition command for a specific burner among the first ignition command and the second ignition command, and the ignition delay processing is executed for the ignition commands for the other burners. An ignition restraining process may be executed. Specifically, the ignition delay processing is executed only for the ignition command for the small-heat-power stove burner 2c disposed in the central portion on the back side and the grill burners 16a and 16b of the grill portion 3 in the above-described embodiment. As for the ignition command relating to the burner, the above-described ignition restraining process may be executed.

In each of the above embodiments, the gas stove A with a grill has been described, but the present invention is not limited to the gas stove A with a grill. good too.

That is, the control unit 40 detects that at least one stove burner out of the stove burners 2a to 2c has gone out, or is in a state where it is possible that it will go out. When there is an ignition command to another stove burner, the other stove burner is ignited with a predetermined time delay from the time of the ignition command, or the other stove burner is ignited regardless of the ignition command. It is also possible not to ignite the burner.

In this embodiment as well, low-temperature automatic cooking is possible by intermittent combustion in which the stove burners 2a to 2c alternate between the combustion state and the extinguishing state.

Other configurations and effects are the same as those of the above embodiment.

In each of the above embodiments, the ignition plugs of all the burners share the igniter as the igniter, but the burner provided with the ignition plug that does not share the igniter, that is, is electrically connected to another igniter. A configuration including a burner provided with a spark plug may be employed.

In each of the above-described embodiments, as intermittent combustion cooking that repeats the ignition state and the extinguishing state, the case of automatic cooking at a low temperature has been described. A timer reservation for rice cooking, in which the lighting and extinguishing operation is automatically performed and the rice cooking is executed, may be performed.

2a to 2c Stove burner 3 Grill section
7a to 7c, 21 temperature sensor 8a to 8c heating state control unit 12 cooking setting input unit for grill 13 cooking setting input unit for gas stove 14a to 14c, 17a, 17b ignition plug 15a to 15c, 18a, 18b thermocouple 16a, 16b grill burner 22 igniter
28 original solenoid valve 29 to 32 flow control valve 40 control unit (fire extinguishing command means, combustion control means)
A gas stove with grill (cooking device)

Claims (7)

a plurality of heating burners for cooking; a plurality of ignition plugs respectively arranged in the plurality of heating burners for cooking; a shared igniter to which the plurality of ignition plugs are electrically connected; extinguishing safety devices respectively corresponding to the heating burners for cooking; ignition extinguishing command means for instructing ignition and extinguishing of the plurality of heating burners for cooking; control of combustion of the plurality of heating burners for cooking; Combustion control means for controlling ignition and extinguishing of the plurality of cooking heating burners based on the command of and the state of the safety device,
The combustion control means is in a state in which the extinction safety device corresponding to at least one heating burner for cooking among the plurality of heating burners for cooking detects extinction, or a state in which extinction may be detected. When there is an ignition command to the cooking burners other than the at least one cooking burner, the other cooking burners are ignited with a predetermined time delay from the time of the ignition command. perform ignition,
A cooking device characterized by: a plurality of heating burners for cooking; a plurality of ignition plugs respectively arranged in the plurality of heating burners for cooking; a shared igniter to which the plurality of ignition plugs are electrically connected; extinguishing safety devices respectively corresponding to the heating burners for cooking; ignition extinguishing command means for instructing ignition and extinguishing of the plurality of heating burners for cooking; control of combustion of the plurality of heating burners for cooking; Combustion control means for controlling ignition and extinguishing of a plurality of cooking heating burners based on the command of and the state of the safety device,
The combustion control means is in a state in which the extinction safety device corresponding to at least one heating burner for cooking among the plurality of heating burners for cooking detects extinction, or a state in which extinction may be detected. and when there is an ignition command to a cooking heating burner other than the at least one cooking heating burner, the other cooking heating burner is not ignited regardless of the ignition command.
A cooking device characterized by: The combustion control means considers that there is a possibility that the extinction safety device detects the extinction, and in the standby state in which the extinction safety device is delayed for the predetermined time, when the extinction safety device detects the extinction, at least the extinction safety device is operated. delaying execution of ignition of said other cooking heating burner until completed;
The heat cooking device according to claim 1. The ignition extinguishing command means issues a first ignition command by the ignition operation of the operation unit, and a second ignition command by executing intermittent combustion cooking in which the heating burner for cooking repeats the ignition state and the extinguishing state. ,
The combustion control means is in a state in which the extinction safety device corresponding to at least one heating burner for cooking among the plurality of heating burners for cooking detects extinction, or a state in which extinction may be detected. and when there is an ignition command of one of the first ignition command and the second ignition command to a cooking heating burner other than the at least one cooking heating burner, the one ignition command is Regardless, when the other cooking heating burner is not ignited and there is the other of the first ignition command and the second ignition command to the other cooking heating burner, executing the ignition of the other cooking heating burner with a predetermined time delay from the time of the other ignition command;
The heat cooking device according to claim 2. The ignition extinguishing command means issues a first ignition command by the ignition operation of the operation unit, and a second ignition command by executing intermittent combustion cooking in which the heating burner for cooking repeats the ignition state and the extinguishing state. ,
The combustion control means is in a state in which the extinction safety device corresponding to at least one heating burner for cooking among the plurality of heating burners for cooking detects extinction, or a state in which extinction may be detected. and when there is the first ignition command or the second ignition command to a cooking heating burner other than the at least one cooking heating burner, the ignition command is delayed for the predetermined time. to perform ignition of the other cooking heating burner,
The heat cooking device according to claim 1 or 3. The plurality of heating burners for cooking includes a stove burner and a grill burner,
The extinguishing safety device includes a plurality of flame detection sensors respectively arranged in the plurality of cooking heating burners, a safety valve for opening and closing a gas flow path to the plurality of cooking heating burners, and the flame detection sensor. Based on the output, each heating burner for cooking goes out and a go-out detection unit that detects the possibility of go-out,
controlling opening and closing of the safety valve based on the detection result of the extinction detection unit;
The heat cooking device according to any one of claims 1 to 5. the flame detection sensor is a thermocouple,
The extinction detection unit detects the extinction when the electromotive force of the thermocouple is equal to or less than a predetermined value, and detects the extinction when the slope of the decrease in the electromotive force per predetermined time is greater than the predetermined slope of decrease. to detect it as a possible vanishing,
The heat cooking device according to claim 6.

Images