JPH04302913A - Burner for ignition control device - Google Patents

Abstract

PURPOSE:To perform an ignition operation definitely at the time of hot start for reuse of a burner in an ignition controller which halts an igniter by means of a thermocouple to detect the ignition of the burner. CONSTITUTION:There is installed a device which operates an ignition circuit 30B for a fixed time, responding to ignition operation. This device is provided an ignition timer 31a which clocks a shorter time than a fixed time and a thermocouple 23 and performs an ignition stop operation which halts the operation of the ignition circuit 30B based on the output of the thermocouple 23.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ignition control device for combustion equipment that controls an igniter provided in a burner.

0002

BACKGROUND OF THE INVENTION Many combustion appliances such as stove burners used in cooking appliances are equipped with igniters that ignite using, for example, spark discharge or electric heaters. When done, the igniter is activated based on a signal from the ignition switch activated in conjunction with the ignition operation. This igniter is controlled by an ignition control device, and once the ignition switch is closed or opened by the ignition operation, an ignition timer that measures a certain period of time is activated based on the signal, and the combustion equipment is disconnected from the combustion equipment for a certain period of time after the ignition operation. It continues to operate even if you remove your hand. In addition, in ignition control devices, operating the igniter requires greater power than during combustion, and in order to reduce power consumption,
Alternatively, if the igniter continues to operate even after ignition, it will give the impression that the ignition detection operation is not working properly. Ignition detection is performed using a thermocouple installed to close the gas valve, and the igniter operation is stopped when ignition is detected after the ignition operation has started, thereby preventing unnecessary operation of the igniter after the burner has ignited. There are things that stop it from working. In this case, ignition detection is determined based on whether the output voltage of the thermocouple exceeds a predetermined voltage.

0003

[Problems to be Solved by the Invention] However, the output voltage of the thermocouple is slow to respond to heating by the burner, and after the burner is extinguished, the temperature of the thermocouple is delayed due to residual heat. The output voltage does not drop immediately. Under these conditions, in order to detect ignition as quickly as possible in order to stop the igniter, the reference voltage value for ignition detection should be a voltage lower than the output voltage when the thermocouple is sufficiently heated. However, if you do so, when you want to ignite the burner once it has been extinguished (hereinafter referred to as a hot start),
Ignition is incorrectly detected due to the output voltage of the thermocouple not being sufficiently cooled, and as a result, the igniter stops operating even though the burner is not ignited. For this reason, hot start has a problem in that ignition cannot be performed until the thermocouple has sufficiently cooled down.

The present invention is an ignition control device for combustion equipment that continuously operates the igniter through the ignition operation and detects the ignition of the burner using a thermocouple. The purpose is to ignite quickly and reliably.

[0005]

Means for Solving the Problems The present invention starts the operation of an igniter provided in a burner to which fuel is supplied in connection with the ignition operation, and after a certain period of time, the igniter is activated. In the ignition control device for a combustion device, the first invention includes: a timer that is started in connection with the ignition operation and measures a predetermined time shorter than the certain time; and a thermoelectric generating element heated by the burner. The technical means is to perform an ignition stop operation to stop the operation of the igniter based on the output information of the thermoelectric generating element after the timer finishes counting. A second invention includes a thermoelectric generating element heated by the burner, and a timer that measures a predetermined time shorter than the certain time, and when output information of the thermoelectric generating element is equal to or higher than a predetermined output at the time of the ignition operation. , operating the igniter for the predetermined time measured by activating the timer, and stopping the operation of the igniter based on output information of the thermoelectric generating element when the predetermined output is less than the predetermined output; as a technical means.

[0006]

[Operation] In the first aspect of the present invention, when the ignition operation is performed, the igniter starts operating, and at this time, the timer starts counting a predetermined period of time. When the burner is ignited during this predetermined period of time as the igniter is activated, the thermoelectric generator is heated and an output voltage is generated. The igniter always operates until the timer finishes counting the predetermined time, and when the timer finishes counting, it is determined whether or not to stop the igniter operation based on the output information of the thermoelectric generator. be exposed. If output information corresponding to ignition detection is obtained, an ignition stop operation is performed to stop the igniter operation, and if no information corresponding to ignition detection is obtained, the igniter continues to operate and ignition operation is performed. continues, and the igniter stops operating when output information corresponding to ignition detection is obtained. After a certain period of time has elapsed, the igniter stops operating even if no output information is obtained from ignition detection. In the second invention, when the output information of the thermoelectric power generation element when the ignition operation is performed is less than the predetermined output, based on the output information of the thermoelectric power generation element, for example, the output information becomes equal to or higher than the reference output. Sometimes, the igniter stops working. Conversely, if the output information of the thermoelectric generating element when the ignition operation is performed is equal to or higher than the predetermined output, the timer is activated, and the igniter is always activated at the predetermined time measured by the timer.

[0007]

According to the first aspect of the present invention, the igniter always operates from the start of the ignition operation until the timer finishes counting the predetermined time, regardless of whether or not ignition is detected. Therefore, when a hot start is performed by re-igniting the burner within a predetermined time after extinguishing the burner, the temperature of the thermoelectric generating element is high even though the burner has not ignited, and the temperature has not cooled down sufficiently. Even if the element is outputting the same output information as the ignition detection state, the operation of the igniter will not be stopped based on incorrect output information of the thermoelectric generating element. Therefore, even in the case of a hot start where the temperature of the thermoelectric generating element is high at the beginning of the ignition operation, the ignition operation can be performed reliably. In addition, in hot start, the output information of the thermoelectric generator is ignored, so it is easy to set the reference value of the thermoelectric generator to determine whether or not the burner has ignited. The stability of the operation stop is increased. Therefore, when the igniter is ignited, the operation of the igniter can be quickly stopped, and the power consumption for driving the igniter can be reduced. In the second invention, during an ignition operation without a hot start, the thermoelectric generator is heated as the burner ignites, and when the output information of the thermoelectric generator reaches predetermined information, the operation of the igniter is stopped. Therefore, the igniter will not operate more than necessary. In addition, in the case of a hot start, the igniter always operates for a predetermined period of time regardless of the output information of the thermoelectric generator, so ignition can be performed reliably and the burner can be easily ignited. .

[0008]

[Embodiment] Next, the present invention will be explained based on an embodiment of a gas stove 100 for a system kitchen. A gas stove 100 shown in FIG. 2 is a composite cooker equipped with a plurality of gas stoves, a grill, and a cooking chamber, and a gas stove 1 as a combustion device according to an embodiment of the present invention is mounted on the top surface of the gas stove 100. It is provided. The gas stove 1 uses a circular stove burner 10 as a heating source, and in the center of the stove burner 10,
A temperature sensor 21 is provided to detect the temperature of the food to be cooked through the cooking container. The temperature sensor 21 is elastically pressed against the cooking container by a spring (not shown), and a thermistor as a temperature detection element is built inside the metal cylindrical container whose end is sealed.

As shown in FIG. 3, fuel gas is guided to the stove burner 10 through a gas pipe 11 branched from a main gas pipe (not shown), and an air supply port for the stove burner 10 is provided at the downstream end of the gas pipe 11. Nozzles 12 are provided correspondingly to each other. The gas pipe 11 has a former solenoid valve 13 in the upstream part.
However, a gas proportional valve 14 is arranged in the downstream part, and the gas pipe 11 is branched into two between the original solenoid valve 13 and the gas proportional valve 14 to form two branch pipes 15 and 16. A solenoid valve 17 is disposed in one of the branch pipes 15, and a throttle solenoid valve 19 having an orifice 18 having a throttle function for the nozzle 12 at the downstream end is disposed in the other branch pipe 16. On the other hand, the stove burner 10 is equipped with an ignition electrode 22 and a thermocouple 23 heated by flame as a thermoelectric generating element for detecting ignition of the stove burner 10. The gas stove 1 having the above configuration includes the gas stove 10
The control device 3
0, and the control state of the control device 30 is displayed on the display section 4.

[0010] The gas stove 1 in the control device 30 will be described below.
The configuration and functional parts related to this and their operations will be explained. The gas stove 1 has a cylindrical operation sensor 2 on the front of the gas stove 100 for turning on and off the stove burners 10 and adjusting the firepower, and an opening/closing mechanism that allows the gas stove 1 to be opened and closed.
00 body, and an operation panel provided in an operation box 3 that can be housed in the main body of the 00.Furthermore, a display section 4 made of a fluorescent display tube for displaying each operation status is provided on the front surface. Operation camera 2 has two position states: a protruding state as the ignition and combustion position and a pushed-in state as the extinguishing position, and a state holding mechanism for maintaining each state and a detection system for detecting each state. Each state is alternately changed each time a push operation is performed. In addition, the operation camera 2 is equipped with an encoder with an endless mechanism that sends out incremental signals in accordance with the rotational direction of the rotation operation. A dynamic operation can be performed, and the adjustment state is displayed by the number of lights of a plurality of LEDs (not shown) provided above the operation camera 2.

As shown in FIG. 4, the control device 30 includes a control circuit 30 mainly composed of a microcomputer.
A, an ignition circuit 30B that operates according to a control signal from a control circuit 30A, and a valve drive circuit 30C. Control circuit 3
0A includes functional units such as an ignition/extinguishing control unit 31, a fire power control unit 32, and a valve control unit 33.

The ignition/extinguishing control unit 31 is equipped with an ignition timer 31a that starts counting in response to the ignition operation signal from the operation camera 2, and is activated for a certain period of time t1 (for example, 10 seconds) measured by the ignition timer 31a. Then, supply of fuel gas is started, and the ignition circuit 30B is activated to ignite the stove burner 10. Also, during the operation for the certain period of time t1, it is determined whether the thermocouple 23 has detected ignition, and if ignition is detected, then the
Each valve is controlled to be open even after the period of time has elapsed. Furthermore, in order to minimize unnecessary operation of the ignition circuit 30B after ignition, a predetermined time t2 shorter than the above-mentioned fixed time t1 is provided.
(for example, 5 seconds) is counted by the ignition timer 31a, the ignition circuit 3
An ignition stop operation is performed to forcibly stop the operation of 0B. Here, when the output voltage of the thermocouple 23 is higher than 2.5 mV as a reference voltage for ignition detection, it is determined that ignition has been detected, and when it is less than 2.5 mV, it is determined as a non-ignition state. During combustion, thermocouple 2
3 is monitored, and if it is lower than the reference voltage, each valve is closed and combustion of the stove burner 10 is stopped. The fire extinguishing control performs a fire extinguishing operation of closing each valve in response to the fire extinguishing operation in operation shot 2.

[0013] When the ignition control is finished, the fire power control section 32
The firepower level is determined according to the operation of the operation camera 2, and if each operation mode is selected, temperature control is performed to adjust the predetermined firepower level corresponding to each operation mode, and the firepower is adjusted. The level information is transmitted to the valve control section 33. The firepower level determined by the operation shooting 2 has eight levels, levels 1 to 8, and is changed according to the signal from the encoder described above. The operation mode in the firepower control unit 32 is switched and set by each switch provided in the operation box 3, and the operation mode accompanied by the operation of the cooking timer 32a provided as a functional part of the firepower control unit 32 is a timer set mode. There are three types of operation modes: boiling mode, which will be described later, by pressing the switch 3a, timer cut mode, which automatically extinguishes the fire after a set time has elapsed, and notification timer mode, which notifies you with an alarm after the set time has elapsed. The mode is sequentially and repeatedly switched each time the timer set switch 3a is pressed. Further, by pressing the high temperature switch 3b, a frying mode is selected in which the temperature of the food to be cooked is controlled according to the set temperature.

In the frying mode, when the high temperature switch 3b is operated to select the frying mode, a set temperature is set at the same time, and this set temperature is set when the power switch (not shown) is turned on and the frying mode is used for the first time. is 1
80° C. is set, and once it is used, the temperature set in the previous frying mode is set as the current set temperature. In the frying mode, if it is necessary to change the set temperature, press the high temperature switch 3b or low temperature switch 3c once to set the temperature to +10°C.
Alternatively, a temperature change of -10°C is carried out within the range of 130 to 210°C, respectively. In addition, if you keep pressing the high temperature switch 3b or low temperature switch 3c for more than 0.7 seconds when setting the temperature, the temperature will increase by +10℃ or -10℃ every 0.4 seconds.
Temperature changes are repeated, and the set temperature can be changed continuously.

The heat control unit 32 includes a temperature control unit 32b that adjusts the heat level based on the temperature T detected by the temperature sensor 21. Temperature control is performed in the water boiling mode and the rice cooking mode, respectively, which are switched by a switch, and here, the temperature control in the boiling mode and the frying mode will be explained based on FIGS. 5 and 6, respectively.

In the boiling mode, when ignition is detected in the ignition control, the firepower level is determined based on the operation shot 2 (step 11). Until the temperature T detected by the temperature sensor 21 reaches 105° C. (NO in step 12), step 11 is repeated to continue the firepower level based on the operation shot 2. When the detected temperature T reaches 105° C. or more (YES in step 12), the cooking timer 32a set by a timer time setting switch (not shown) starts measuring time (step 13). At this time, the firepower level is changed from the firepower level based on operation shot 2 to the minimum firepower level 1, and the firepower level 1 is 35
(step 14). Thereafter, the firepower level is changed again from firepower level 1 to the firepower level based on operation shot 2, and this continues for 5 seconds (step 15). Thereafter, steps 14 and 15 are repeated, and when the cooking timer 32a finishes counting in either step 14 or step 15, the process shifts to extinguishing control. Note that in each operating mode such as the boiling mode and the like by operating the timer set switch 3a, if the time of the cooking timer 32a is not set, an error will occur after 15 seconds, and this fact will be displayed and notified.

In the fried food mode, when ignition is detected in the ignition control, the firepower level is determined based on the operation shot 2 (step 21). Until the detected temperature T of the temperature sensor 21 reaches the set temperature Tset+4° C. (NO in step 22), step 21 is repeated to continue the firepower level based on the operation shot 2. Detected temperature T
becomes higher than the set temperature Tset+4°C (step 22
(YES), the firepower level is changed from the firepower level based on operation shot 2 to the minimum firepower level 1 (step 23). Thereafter, until the detected temperature T of the temperature sensor 21 falls to the set temperature Tset-4°C (step 24
(NO), step 23 is repeated to continue the firepower level 1. When the detected temperature T of the temperature sensor 21 falls below the set temperature Tset-4°C (YES in step 24), the process moves to step 21 and the operation shooting 2 is performed again.
The firepower level will be changed according to the setting. Thereafter, steps 21 to 21 are performed until the fire extinguishing operation is performed by operation shooting 2.
Repeat step 24. The setting time and each operating mode of the cooking timer 32a described above can be switched before or after the ignition operation by the operation shooting 2, and each operating mode is started after the ignition is detected. All will be canceled by operating . In addition, in the temperature control, a predetermined disconnection check control regarding the temperature sensor 21,
High-cut stop control is performed based on the detected temperature.

Next, the valve control section 33 will be explained. The valve control unit 33 is a functional unit that mainly controls the current value of the gas proportional valve 14 according to the thermal power level determined by the thermal power control unit 32. In particular, in this embodiment, within the range of firepower level 2 to firepower level 8, the solenoid valve 17 and the throttle solenoid valve 19
On the other hand, at thermal power level 1, by closing the solenoid valve 17 and opening only the throttle solenoid valve 19, the gas amount is limited by the orifice 18. The current value I1 is set to a larger current value (for example, 50 mA) than the current value I2 (for example, 20 mA) at the thermal power level 2, and is set to the smallest value at the thermal power level 2, and the gas proportional valve 14
The current value I is set to gradually increase from the thermal power level 2 to the thermal power level 8. Therefore, firepower level 1
In the switching control between the first and second thermal power levels, the valve operating speed of the gas proportional valve 14 is easily influenced by the difference between when the opening degree increases and when the opening degree decreases. Therefore, different control operations are performed during the ignition operation before the ignition is detected and when the firepower is controlled after the ignition is detected, as described below.

During the ignition operation, the ignition operation is performed by the operation camera 2 in the ignition/extinguishing control section 31, and when the throttle solenoid valve 19 is opened 0.5S (seconds) after the original solenoid valve 13 is opened, the throttle is turned off. The solenoid valve 17 is opened at the same time as the solenoid valve 19, and at this time, the current value of the gas proportional valve 14 is set to 0 mA. Thereafter, the current value of the gas proportional valve 14 is increased by 1 m every 20 mS until the current value I5 corresponding to the thermal power level 5 is reached.
Increase by A. Stove burner 10 by ignition operation
When ignition occurs, 0.5S after ignition detection in the ignition determination performed after 5S (seconds) have elapsed from the ignition operation, the current value I of the gas proportional valve 14 is adjusted to correspond to the firepower level based on the operation shot 2. Starts the current value changing operation to change to the specified value. Also in this current value changing operation, the gas proportional valve 14
The current value I is increased or decreased by 1 mA every 20 mS.

At the time of firepower control, if any one of firepower levels 2 to 8 is determined according to the operation shot 2, both the solenoid valve 17 and the throttle solenoid valve 19 are opened, and the gas proportional The current value of the valve 14 is controlled to a current value according to the determined firepower level, and when the firepower level is changed within the range of firepower level 2 to firepower level 8, each The current value of the gas proportional valve 14 is changed in accordance with the thermal power level. On the other hand, at the thermal power level 1, as described above, the solenoid valve 17 is closed and only the throttle solenoid valve 19 is opened, and the current value I1 of the gas proportional valve 14 is changed to the current value I2 of the thermal power level 2.
A larger current value (for example, 50 mA) is used. In addition, when there is a change in the thermal power level between thermal power level 1 and thermal power level 2, as described above, in order to reduce the influence of the valve operating speed of the gas proportional valve 14, the thermal power level
In the case of switching from thermal power level 2 to thermal power level 2, as shown in FIG. In the case of switching to level 1, as shown in FIG. 8, the current value of the gas proportional valve 14 is instantly changed from I1 to I2 0.1 seconds after closing the solenoid valve 17. By performing each of the above switching control operations, fuel gas exceeding each thermal power level is not supplied at each thermal power level.

In the valve control unit 33, the current value I of the gas proportional valve 14 corresponding to each thermal power level is determined in advance for each type of gas used, and these are stored in a ROM (not shown) as current value data. The current value data read out is switched for each gas type by a gas type changeover switch 33a provided in the valve control unit 33. The stored current value data is the current value I1 at thermal power level 1 and thermal power level 2, regardless of the gas type.
, the current value I2 is 50 mA and 20 mA, respectively,
At firepower levels 2 to 8, the current value I2 (20mA) at firepower level 2 is determined at intervals of 9 to 22mA (not necessarily at constant intervals), respectively, from the current value I2 (20mA) at firepower level 2 to firepower level 8. For example, at firepower level 8, teeth,
76mA for natural gas (TG), 13mA for city gas (13mA)
112mA in case of A), 150mA in case of LPG
It is A. The ignition circuit 30B is a well-known high voltage generation circuit that generates spark discharge at the ignition electrode 22,
The valve drive circuit 30C drives each valve according to a control signal from the valve control section 33.

Next, the ignition operation in the gas stove 100 showing the first embodiment of the present invention having the above configuration will be explained based on FIG. When the ignition switch is turned on by performing the ignition operation according to the operation camera 2 (YES in step 101), the driving of the ignition circuit 30B, the operation of the ignition timer 31a, and the opening operation of the main solenoid valve 13 are started (step 102). ). After step 102, 0.5
A delay is performed using a second timer (step 103), and then each solenoid valve 17, 19 is opened (step 10).
4) Increase the current value of the gas proportional valve 14, which was 0 mA in the initial state, by 1 mA and start energizing (Step 1
05). The firepower level during ignition operation is firepower level 5.
is set, and it is determined whether the current value of the gas proportional valve 14 has reached the current value I5 corresponding to this thermal power level 5. As a result of the determination, the current value I5 of firepower level 5
(NO in step 106)
), after a delay of 20 mS (step 107), the process moves to step 105 and the current value of the gas proportional valve 14 is increased by 1 mA again. The operation of increasing the current value of the gas proportional valve 14 by 1 mA every 20 mS is performed at the thermal power level 5.
This is repeated until the current value I5 is reached.

When the current value I5 of the firepower level 5 is reached (YES in step 106), ignition detection is performed based on the electromotive force of the thermocouple 23, and here, a reference voltage of 2.5 mV is used as the reference voltage for ignition detection. Since a low value is set, highly sensitive ignition detection is possible. If the output voltage of the thermocouple 23 has not reached the reference voltage (NO in step 108), it is determined whether 10 seconds have elapsed since the ignition operation was started, and 10 seconds have not elapsed. If so (NO in step 109), the process moves to step 108, and it is repeatedly determined whether the output voltage of the thermocouple 23 has reached the reference voltage until 10 seconds have elapsed. If the output voltage of the thermocouple 23 does not reach the reference voltage within 10 seconds after starting the ignition operation (YES in step 109), each valve is closed and the operation of the ignition circuit 30B is stopped. Finishing the ignition operation (step 110
). If the output voltage of the thermocouple 23 reaches the reference voltage (YES in step 108), and if 5 seconds have passed since the start of the ignition operation (YES in step 111), the drive of the ignition circuit 30B is stopped ( Step 112). If 5 seconds have not elapsed since the start of the ignition operation (NO in step 111), the process waits until 5 seconds have elapsed, and when the 5 seconds have elapsed, the process moves to step 112 to stop driving the ignition circuit 30B. do. Step 1
After 12, a delay is performed using a 0.5 second timer (step 113), and then it is determined whether the current value of the gas proportional valve 14 corresponds to the thermal power level based on the operation shot 2. If the current value is not the current value determined based on operation capture 2 (NO in step 114),
Change the current value by 1mA (step 115),
Wait for 20 mS (NO in step 116),
After the elapsed time (YES in step 116), step 1
14, the current value is repeatedly determined. When the current value of the gas proportional valve 14 reaches a current value corresponding to the thermal power level based on the operation shot 2 (YES in step 114), combustion continues (step 117), and each switch is turned on as necessary. When an operation is being performed, the operation mode is switched to the one corresponding to each switch.

By performing the above control operation, the ignition circuit 30B operates reliably for 5 seconds after the start of the ignition operation according to operation shot 2, regardless of the output information of the thermocouple 23, as shown in FIG. Therefore, in the case of a hot start in which the ignition operation is performed shortly after combustion has stopped, the operation of the ignition circuit 30B will not be stopped by mistake even if the temperature of the thermocouple 23 has not fallen sufficiently. Therefore, reliable ignition operation can be performed. Further, in the hot start, since erroneous operation is not performed due to the output information of the thermocouple 23, the reference voltage for ignition detection can be set relatively low, and the sensitivity of ignition detection can be improved.

FIG. 10 shows the ignition control operation according to the second embodiment of the present invention. In the second embodiment, steps 201 to 207 are the same as those in step 10 in the first embodiment.
1 to step 107, and if the current value of the gas proportional valve 14 is a current value corresponding to the thermal power level based on the operation of operation capture 2 (YES in step 206), the ignition operation is performed. The ignition is not determined based on the output voltage of the thermocouple 23 until the 5 seconds counted by the ignition timer 31a have elapsed since the start of the ignition (NO in step 208).
After seconds have passed (YES in step 208)
, it is determined whether the output voltage of the thermocouple 23 has exceeded the reference voltage, and if the output voltage of the thermocouple 23 has not reached the reference voltage (NO in step 209), the ignition operation is started. Until 10 seconds have elapsed (NO in step 210), step 209
, 210 are repeated, and if the output voltage of the thermocouple 23 does not reach the reference voltage by the time 10 seconds have elapsed after starting the ignition operation (YES in step 210).
), each valve is closed and the operation of the ignition circuit 30B is stopped to complete the ignition operation (step 211). If the output voltage of the thermocouple 23 reaches the reference voltage before 10 seconds have passed since the ignition operation was started (YES in step 209), in steps 212 to 216, step 112 in the first embodiment is performed.
Similarly to step 116, the operation of the ignition circuit 30B is stopped and the current value of the gas proportional valve 14 is controlled to change in a predetermined sequence, and the current value is changed to correspond to the thermal power level based on the operation shot 2. Afterwards (YES in step 214), thermal power control is performed according to each operation mode (step 217). Due to the above control operation, even in the second embodiment, until 5 seconds have elapsed from the start of the ignition operation,
Since the ignition detection is not determined based on the output voltage of the thermocouple 23, it is possible to perform a reliable ignition operation and improve the ignition detection sensitivity in the hot start, as in the first embodiment. can.

FIG. 11 shows the operation of the third embodiment of the present invention. In the third embodiment, in addition to the above-mentioned ignition detection, when the ignition operation is started, the output voltage of the thermocouple 23 is detected, and based on the output voltage, it is determined whether or not there is a hot start, and the The ignition circuit 30B is controlled to stop. The operation will be explained below. When the ignition operation is performed (YES in step 301), it is determined whether the output voltage of the thermocouple 23 is equal to or higher than the determination voltage for determining whether or not a hot start is performed, and if it is equal to or higher than the determination voltage (YES in step 302), It was determined that this was a hot start in which a re-ignition operation was performed shortly after the extinguishing operation, and 3.
Along with starting the second timer (step 303)
, starts operating the ignition circuit 30B (step 304).
. Thereafter, the ignition circuit 30B remains activated until the 3-second timer finishes counting (NO in step 305), and when 3 seconds have elapsed (YES in step 305), the operation of the ignition circuit 30B is stopped. (Step 306). On the other hand, if the output voltage of the thermocouple 23 does not reach the determination voltage (NO in step 302), the 3-second timer described above does not measure time, and only the ignition circuit 30B starts operating (step 307). Thereafter, it is determined whether the output voltage of the thermocouple 23 has reached a reference voltage for determining whether or not ignition has occurred, and if it has not reached the reference voltage (NO in step 308), the ignition circuit Until the operating time of 30B reaches 10 seconds (NO in step 309), step 308
The determination is repeated. The operation of the ignition circuit 30B is 1
If ignition is performed before 0 seconds and the output voltage of the thermocouple 23 reaches the reference voltage (YES in step 308), at that point the ignition circuit 30
The operation of B is stopped (step 306). If the output voltage of the thermocouple 23 does not reach the reference voltage within 10 seconds (YES in step 309)
, stops the operation of the ignition circuit 30B regardless of ignition detection (
Step 306): At this time, each valve is closed under separate valve control to stop the supply of fuel gas. As described above, in the third embodiment, when the ignition operation is performed, in the case of a hot start where the output voltage of the thermocouple 23 is high, the ignition circuit 30B is forcibly activated by the 3 second timer. The operation of the ignition circuit 30B does not stop due to ignition detection due to incorrect output information from the thermocouple 23.

[Brief explanation of the drawing]

FIG. 1 is a flowchart for explaining the operation of ignition control in a first embodiment of a gas stove control device showing an embodiment of the present invention.

FIG. 2 is a perspective view showing the appearance of a gas table according to an embodiment of the present invention.

FIG. 3 is a schematic diagram showing a gas circuit in a gas stove of a gas stove showing an embodiment of the present invention.

FIG. 4 is a block diagram showing the functional configuration of a gas stove control device according to an embodiment of the present invention.

FIG. 5 is a flowchart for explaining the operation of the boiling mode in the gas stove control device according to the embodiment of the present invention.

FIG. 6 is a flowchart for explaining the operation of the frying mode in the gas stove control device according to the embodiment of the present invention.

FIG. 7 is a time chart for explaining switching operation of valve control from thermal power level 1 to thermal power level 2 in the gas stove control device showing the embodiment of the present invention.

FIG. 8 is a time chart for explaining switching operation of valve control from thermal power level 2 to thermal power level 1 in the gas stove control device showing the embodiment of the present invention.

FIG. 9 is a time chart for explaining the ignition control operation of the first embodiment of the gas stove control device showing the embodiment of the present invention.

FIG. 10 is a flowchart for explaining the operation of ignition control in a second embodiment of the gas stove control device according to the embodiment of the present invention.

FIG. 11 is a flowchart for explaining the control operation of the ignition circuit in the ignition control of the third embodiment of the gas stove control device showing the embodiment of the present invention.

[Explanation of symbols]

1 Gas stove (combustion equipment) 10 Stove burner (burner) 23 Thermocouple (thermal power generation element) 30B Ignition circuit (igniter) 31 Ignition/extinguishing control unit (ignition control device for combustion equipment) 31
a Ignition timer (timer)

Claims (2)

[Claims] Claims: 1. A combustion device for a combustion device, which starts the operation of an igniter provided in a burner to which fuel is supplied in connection with the ignition operation, and stops the operation of the igniter after a certain period of time. The ignition control device includes a timer that is started in connection with the ignition operation and measures a predetermined time shorter than the certain time, and a thermoelectric generating element heated by the burner, and the thermoelectric generating element is heated after the timer finishes timing. An ignition control device for a combustion appliance, characterized in that the ignition control device performs an ignition stop operation to stop the operation of the igniter based on output information of the igniter. 2. A combustion equipment comprising: starting the operation of an igniter provided in a burner to which fuel is supplied in connection with the ignition operation, and stopping the operation of the igniter after a certain period of time; The ignition control device includes a thermoelectric generating element heated by the burner and a timer that measures a predetermined time shorter than the certain time, and when output information of the thermoelectric generating element is equal to or higher than a predetermined output during the ignition operation. , operating the igniter for the predetermined time measured by activating the timer, and stopping the operation of the igniter based on output information of the thermoelectric generating element when the predetermined output is less than the predetermined output; A combustion equipment control device characterized by: