KR950002922B1 - Ignition control device of burner - Google Patents

Abstract

The ignition control device eliminates unnecessary operations after the burner is fired by stopping operation of the ignitor to reduce electricity consumption. It makes the extinguished burner re-ignited without faults. A gas cooking device(1) has several circular burners(10) having a temperature sensor at the center. A control device is fixed in front of gas table(100). The control device comprises a control circuit, a ignition circuit operated by control signals, and a valve operating circuit. The control circuit comprises a ignition/extinguishment control, a burning power control, and a valve control.

Description

Ignition Control Device of Combustor

1 is a flowchart for explaining the ignition control operation of the first embodiment in the gas table control apparatus according to the embodiment of the present invention.

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

3 is a schematic diagram showing a gas circuit in a gas furnace of a gas table according to an embodiment of the present invention.

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

Fig. 5 is a flowchart for explaining the operation of the assembled cooking mode in the gas table control device according to the embodiment of the present invention.

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

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

8 is a time chart for explaining the switching operation of the valve control from the thermal power level 2 to the thermal power level 1 in the gas table control apparatus according to the embodiment of the present invention.

9 is a time chart for explaining the operation of the ignition control as the first embodiment of the gas table control device according to the embodiment of the present invention.

10 is a flowchart for explaining the operation of the ignition control which is the second embodiment of the control apparatus of the gas table showing the embodiment of the present invention.

Fig. 11 is a flowchart for explaining the control operation of the ignition circuit in the ignition control as the third embodiment of the gas table control device according to the embodiment of the present invention.

* Explanation of symbols for main parts of the drawings

1: gas stove (combustion apparatus) 10: stove furnace (burner)

23: thermocouple (thermal power generation element) 30B: ignition circuit (ignition)

31: ignition fire control unit (ignition control device of the combustion equipment)

31a: ignition timer (timer)

The present invention relates to an ignition control device of a combustion device for controlling an igniter provided in a burner.

Most combustion apparatuses such as cookers, etc. used in cookers are equipped with an igniter for igniting, for example, by flame discharge or electric heater, and ignition operation for supplying fuel to the burner is related to ignition operation. The operation of the igniter is started in accordance with the signal of the ignition switch in operation.

This igniter is controlled by the ignition control device, and when the ignition switch is closed or opened by the ignition operation, the ignition timer is displayed for a certain time according to the signal, and the ignition timer continues for a certain time after the ignition operation is released. To work.

In addition, in the ignition control device, the operation of the igniter requires cone power as compared with combustion, and if the igniter continues to operate even if the power consumption is reduced or ignited, the operation for ignition detection is not normally performed. Ignition detection by a thermocouple installed to close the gas valve at the time of fire in order to avoid an impression, and the operation of the igniter is stopped after the ignition operation is started after the ignition operation is started to eliminate unnecessary operation of the igniter after ignition of the burner. There is. In this case, the ignition detection is determined by whether or not the output voltage of the thermocouple has exceeded a predetermined voltage.

However, the output voltage of the thermocouple does not immediately decrease because the temperature of the thermocouple is delayed by the heat after the reaction of the burner is delayed and the burner is extinguished.

In order to detect the ignition as soon as possible in order to stop the operation of the igniter, a voltage value lower than the output voltage value when the thermocouple is sufficiently heated must be used as the reference voltage value for the ignition detection. In this case (hereinafter referred to as hot stat), the igniter is stopped even though the burner does not ignite due to false ignition detection by the output voltage of the thermocouple which is not sufficiently cooled. Therefore, at hot start, there is a problem that the thermocouple cannot be ignited until it is sufficiently cooled.

In the ignition control device of a combustion apparatus which continuously operates an igniter by an ignition operation and detects ignition of a burner by a thermocouple, the ignition control can be ignited quickly and reliably even in the case of a hot start caused by the burner reuse. It aims to do it.

The present invention relates to an ignition control apparatus of a combustor for starting an operation of an igniter provided in a burner to which fuel is supplied in relation to an ignition operation and stopping the operation of the igniter after a predetermined time. Is provided with a timer that starts up in relation to the ignition operation and clocks a predetermined time shorter than the predetermined time and a thermal power generator heated by the burner, and after completion of the timer's timeout, on the basis of the output information of the thermal power generator. It is a technical means to perform an ignition stop operation to stop operation.

The second invention is provided with a heat generating element heated by the burner and a timer for indicating a predetermined time shorter than the predetermined time, and when the output information of the heat generating element is more than a predetermined output during the ignition operation, the timer is operated. The technical means is to operate the igniter for the predetermined time that is displayed and to stop the operation of the igniter based on the output information of the thermal power generator when the predetermined output is not reached.

In the first invention of the present invention, when the ignition operation is performed, the igniter starts to operate, and at this time, the timer starts timing of a predetermined time.

When the burner ignites in accordance with the operation of the igniter during this predetermined time, the thermal power generation element is heated to generate an output voltage.

The igniter always operates until the timer ends the predetermined time, and when the timer expires, it is determined whether or not to stop the operation of the igniter according to the output information of the thermal power generator.

If the output information corresponding to the ignition point is obtained, the ignition stop operation is stopped to stop the operation of the igniter. If the information corresponding to the ignition detection is not obtained, the igniter continues to operate and continues the ignition operation. When an output is obtained, the igniter stops working.

After a certain time has elapsed, the igniter will stop operating even if the output information by the ignition detection is not obtained.

In the second aspect of the invention, when the output information of the thermal power generation element when the ignition operation is performed does not reach a predetermined output, the operation of the igniter is stopped, for example, when the output information becomes higher than the reference output based on the output information of the thermal power generation element. do.

On the contrary, when the output information of the thermal power generation element when the ignition operation is made is more than a predetermined output, the timer operates and the igniter always operates at a predetermined time indicated by the timer.

In the first invention of the present invention, the igniter always operates regardless of the presence or absence of ignition detection from the start of the ignition operation until the end of the predetermined time by the timer. Therefore, even though the burner did not ignite when hot start by re-ignition within a predetermined time after the burner was extinguished, the thermoelectric element outputs the same output information as the ignition detection state because the temperature of the thermoelectric element was not high enough. Even if there is, there is no case that the operation of the igniter is stopped by the incorrect output information of the thermal power generator.

Therefore, even in the case of a hot start in which the temperature of the thermal power generation element is high in the early stage of the ignition operation, the ignition operation can be surely performed.

In the hot start, the output information of the thermal power generation element is ignored, so that the reference value of the thermal power generation element for determining whether the burner is ignited is easy to set, and the stability of the operation stop of the igniter according to the ignition detection increases.

Therefore, when ignited, the operation of the igniter can be stopped quickly, and power consumption for driving the igniter can be reduced.

In the second invention, the operation of the igniter is stopped when the ignition operation is not performed at the hot start, when the thermal power generation element is heated in accordance with the burner ignition and the output information of the thermal power generation element becomes the predetermined information.

Therefore, the igniter does not operate more than necessary.

In the case of hot start, the igniter always operates at a predetermined time irrespective of the output information of the thermal power generator, so that the ignition operation can be performed reliably, and the burner can be easily ignited.

Next, this invention is demonstrated based on the Example in the gas table 100 for system kitchens.

The gas table 100 shown in FIG. 2 is a composite cooker having a plurality of gas furnaces, a grill and a cooking chamber, and a gas furnace 1 as a combustion device according to the embodiment of the present invention is provided on the upper surface thereof.

The gas furnace 1 has a circular furnace furnace burner 10 as a heating source, and the center of the furnace furnace burner 10 is provided with a temperature sensor 21 for detecting the temperature of the workpiece through a cooking vessel.

The temperature sensor 21 is elastically pressed against the cooking vessel by a spring (not shown), and a thermostat as a temperature sensing element is built into the metal-contained container of which the end is closed.

As shown in FIG. 3, fuel gas is guided to the goro burner 10 by a gas pipe 11 branched from a main gas pipe (not shown), and an air supply port of the goro burner 10 is provided at a downstream end of the gas pipe 11. The noggle 12 arrange | positioned corresponding to the mouth is provided.

In the gas pipe 11, an original solenoid valve 13 is disposed upstream and a gas proportional valve 14 is disposed downstream, and a gas pipe 11 is disposed between the original solenoid valve l3 and the gas proportional valve 14. It is divided into two and consists of two flow pipes 15 and 16. The solenoid valve 17 is arrange | positioned at one flow pipe 15, and the nozzle 12 of a downstream end is provided to the other flow pipe 16. A throttle solenoid valve 19 having an orifice 18 having a throttle function is disposed.

Meanwhile, the go-ro burner 10 is provided with a thermocouple 23 which is heated by a flame as a heat generating element for detecting the ignition of the ignition electrode 22 and the go-ro burner 10.

The gas stove 1 having the above configuration is operated by the control device 30 according to the operation of the operation unit provided on the front of the gas table 100, and the control state of the control device 30 is displayed on the display unit 4.

Hereinafter, the structure, the function part, and the operation | movement regarding the gas furnace 1 in the control apparatus 30 are demonstrated.

The gas stove 1 is housed in the main body of the gas table 100 by a cylindrical operation knob 3 and an opening / closing mechanism for ignition fire extinguishing operation and fire power control of the furnace burner 10 in front of the gas table 100. An operation panel formed on the operation box 3 is provided, and the front side of the display unit 4 is formed by a fluorescent display tube for displaying each operation state.

The operation knob 2 has two positional states, a protruding state as an ignition and a combustion position and a pressed state as a fire extinguishing position, and are provided with a state supporting mechanism for maintaining each state and a detection switch for detecting each state. Each time this is done, the state changes alternately.

In addition, the operation knob 2 is provided with an encoder of an endless mechanism for transmitting an increment signal in accordance with the rotational direction of the rotation operation, and can perform a rotation operation for calorie control in the projected state of ignition and combustion position, The adjustment state is indicated by the number of lighting of a plurality of LEDs (not shown) formed on the upper side of the operation knob 2.

As shown in FIG. 4, the control device 30 includes an ignition circuit 30B and a valve driving circuit 30C which operate in accordance with the control signal of the control circuit 30A and the control path 30A which are configured around the microcomputer. Is made of. The control circuit 30A includes functions of the ignition fire extinguishing control unit 31, the thermal power control unit 32, and the valve control unit 33.

The ignition fire control unit 31 has an ignition timer 31a which starts the clocking in accordance with the ignition operation signal of the operation knob 2, and the constant time t1 is displayed by the ignition timer 31a (e.g., 10 seconds) to start the supply of fuel gas and activate the ignition circuit 30B to ignite the go-ro burner 10.

Further, the ignition detection is determined by the thermocouple 23 during the constant time t1 operation, and when ignition is detected, each valve is controlled to be opened even after the predetermined time t1 elapses.

In addition, in order to make the ignition circuit 30B after ignition unnecessary for unnecessary operation, a predetermined time t2 (for example, 5 seconds) shorter than the predetermined time t1 is indicated by the ignition timer 31a, and then the summer An ignition stop operation for forcibly stopping the operation of the ignition circuit 30B is performed based on the output voltage of the couple 23. Here, the case where the output voltage of the thermocouple 23 is higher than 2.5 mV as the reference voltage for the ignition detection is determined as the ignition detection, and the case where the 2.5 mV does not reach is determined as the unignitioned state.

During combustion, the output voltage of the thermocouple 23 is monitored and when lower than the reference voltage, each valve is closed to stop the combustion of the gourd burner 10. The fire extinguishing control performs fire extinguishing by closing each valve in accordance with the fire extinguishing operation of the operation knob 2.

When the ignition control is completed, the thermal power control unit 32 determines the thermal power level according to the operation of the operation knob 2 and at the same time, when each operation mode is selected, a temperature control for adjusting a predetermined thermal power level corresponding to each operation mode. To transmit the thermal power level information to the valve control unit (33). The thermal power level determined by the operation loss (2) has 8 levels of levels 1 to 8 and is changed in accordance with the encoder signal.

The operation mode in the thermal power control unit 32 is set to be switched by each switch provided in the operation box 3, and is an operation mode in accordance with the operation of the cooking timer 32a formed as a functional unit of the thermal control unit 32. By the operation of pressing the timer set switch 3a, the cooking mode described later, the timer cut mode automatically extinguished after the set time has elapsed, and the notification dimmer mode notified by an alarm after the set time has elapsed. There are three types of operation modes, and each of these operation modes is repeatedly switched in sequence every time the timer set switch 3a is pressed. Further, by pressing the hot switch 3b, a frying cooking mode for controlling the temperature of the cooked product according to the set temperature is selected.

In tempura cooking mode, when tempura cooking mode is selected by operating high temperature switch (3b), the set temperature is set at the same time. This temperature is set to 180 ° C for voice actors who use tempura cooking mode for the first time. Once used, the temperature set in the previous tempura cooking mode is set as the current set temperature.

In the tempura cooking mode, when the set temperature needs to be changed, the temperature change of + 10 ° C or -10 ° C is within the range of 130 to 210 ° C by pressing the high temperature switch 3b or the low temperature switch 3c once. Each is carried out in.

Further, when the high temperature switch 3b or the low temperature switch 3c is continuously pressed for 0.7 seconds or more at the time of temperature setting, the temperature change of + 10 ° C or -10 ° C is repeated every 0.4 seconds, so that the set temperature can be continuously changed.

The thermal power control unit 32 has a temperature control unit 32b for adjusting the thermal power level based on the detection temperature t of the temperature sensor 21, and the temperature control is the stew cooking temperature ℃, fried cooking mode and a switch not shown. Although it is carried out in the mode of cutting off the water switched by and the cooking mode, respectively, temperature control in the assembling and frying mode will be described with reference to FIGS. 5 and 6, respectively.

In the cooked cooking mode, when an ignition detection is made in ignition control, the fire power level based on the operation knob 2 is determined (step 11).

Until the detection temperature t of the temperature sensor 21 reaches 105 degreeC (No in step 12), step 11 is repeated, and the thermal power level by the operation knob 2 is continued.

When the detection temperature t becomes 105 ° C or higher (YES in step 12), the cooking timer 32a set by the timer time set switch (not shown) starts to count (step 13). At this time, the thermal power level is changed from the thermal power level by the operation knob 2 to the minimum thermal power level 1, and the thermal power level 1 continues for 35 seconds (step 14). Then, the thermal power level is changed from the thermal power level 1 to the thermal power level by the operation knob 2, which continues for 5 seconds (step 15). Subsequently, step 1 and step 15 are repeated, and in any one of step 14 or step 15, when the cooking timer 32a finishes counting, the control proceeds to the fire extinguishing control.

In each operation mode by the operation of the timer set switch 3a such as the stew cooking mode, if the time setting of the cooking timer 32a is not made, an error is displayed after 15 seconds and the alarm is displayed.

In the frying cooking mode, when the ignition detection is made in the ignition control, the thermal power level by the operation knob 2 is determined (step 21).

(Missing copy of booklet. From page 272)

Until the detection temperature (° C) of the temperature sensor 21 reaches the set temperature (Tset + 4 ° C) (No in step 22), step 21 is repeated to continue the thermal power level by the operation knob 2. .

When the detection temperature (° C) is equal to or higher than the set temperature (Tset + 4 ° C) (YES in step 22), the fire level is changed from the fire level by the operation knob 2 to the minimum fire level 1 (step 23). .

After that, until the detection temperature (° C) of the temperature sensor 21 falls to the set temperature (Tset-2 ° C) (No in step 24), step 23 is repeated to continue the thermal power level 1.

When the detection temperature (° C) of the temperature sensor 21 falls below the set temperature (Tset-4 ° C) (YES in step 24), the process proceeds to step 21 and returns to the thermal power level according to the setting of the operation knob 2 again. Is changed.

Thereafter, steps 21 to 24 are repeated until the operation operation by the operation knob 2 is made.

And the set time and each operation mode of the cooking timer 32a can be switched even before the ignition operation by the operation knob 2, and each operation mode is started after the ignition detection and is canceled by operating a cancellation switch (not shown). do.

In the temperature control, predetermined disconnection check control for the temperature sensor 21 and high cut stop control by the detection temperature are performed.

Next, the valve control unit 33 will be described.

The valve control unit 33 is a function unit that mainly controls the current value of the gas proportional valve 14 in accordance with the thermal power level determined by the thermal power control unit 32.

In particular, in the present embodiment, the solenoid valve 17 and the throttle solenoid valve 19 are opened within the range of the thermal level 2 to the thermal level 8, whereas at the thermal level 1, the solenoid valve 17 is closed and the throttle solenoid valve is opened. Since the amount of gas is limited by the orifice 18 by opening only 19, the current value I1 of the gas proportionality valve 14 at thermal power level 1 is equal to the current value I2 at thermal power level 2 (for example, It is set to a current value larger than 20 mA (for example, 50 mA) and is set the smallest at thermal power level 2, and the current value I of the gas proportional valve 14 is gradually increased toward the thermal power level 8 at thermal power level 2. .

Therefore, in the switching control between the thermal power level 1 and the thermal power level 2, the valve operation speed of the gas proportionality valve 14 is easily affected by the case where the opening degree increases or decreases.

Therefore, during the ignition operation before the ignition detection and the thermal power control after the ignition detection, different control operations are performed as follows.

In the ignition operation, when the throttle solenoid valve 19 is opened after 0.5 S (seconds) when the ignition operation is performed by the operation knob 2 in the ignition fire control section 31 and the solenoid valve 13 is opened. At the same time as the valve 19, the solenoid valve 17 is opened and the current value of the gas proportionality valve 14 is made 0 mA.

Thereafter, the current value of the gas proportionality valve 14 is increased by 1 mA each time 20mS passes until the current value 15 is equivalent to the thermal power level 5.

When the go-ro burner 10 is ignited by the ignition operation, the current value 14 of the gas proportionality valve 14 is set after 0.5 S of the ignition detection in the ignition discrimination executed after 5 S (seconds) in the ignition operation. The current value changing operation of changing the value corresponding to the thermal power level by the operation knob 2 is started. Also in this current value change operation, the current value I of the gas proportionality valve 14 increases or decreases by 1 mA every time 20 mS passes.

In the case of thermal control, when one of the thermal power level 2 to the thermal power level 8 is determined according to the operation knob 2, the solenoid valve 17 and the throttle solenoid valve 19 are both opened and the gas proportional valve 14 Current value according to the determined thermal power level, and when the thermal power level is changed from thermal power level 2 to thermal power level 8, the current value of the gas proportional valve 14 is changed corresponding to each thermal power level when the thermal power level is changed. .

On the other hand, in the thermal power level 1, the solenoid valve 17 is closed as mentioned above, and only the throttle solenoid valve 19 is opened, and the current value I1 of the gas proportionality valve 14 is larger than the current value I2 of the thermal power level 2. Set a large current value (for example, 50 mA).

When there is a change in the thermal power level between the thermal power level 1 and the thermal power level 2, the switching from the thermal power level 1 to the thermal power level 2 is performed in order to reduce the influence of the valve operating speed of the gas proportional valve 14 as described above. In the case of FIG. 7, the solenoid valve 17 is opened after 0.3 seconds of changing the current value of the gas proportional valve 14 from (I2) to (I1) in sequence, and switching from thermal level 2 to thermal level 1 In this case, as in FIG. 8, after closing the solenoid valve 17, the current value of the gas proportionality valve 14 is changed in order from I1 to I2 after 0.1 second.

By performing each of the above switching control operations, fuel gas above 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 predetermined for each type of gas used, and these are stored in many RONIs not shown as current value data. The current value data read out by the gas type switching switch 33a provided in the valve control unit 33 is switched for each gas type.

The stored current value data is related to the gas type at thermal power level 1 and thermal power level 2, and the current value I1 and current value I2 are 50 mA and 20 mA, respectively, and the thermal power levels 2 to 8 indicate the current value at thermal power level 2 ( I2) (20 mA) is determined at 9 to 22 mA intervals (not necessarily at regular intervals) toward thermal power level 8, for example, at thermal power level 8, 76 mA for natural gas (TG) and city gas (13A). ) Is 112 mA and LPG is 150 mA.

The ignition circuit 30B is a well-known high voltage generation circuit which discharges sparks in the ignition electrode 22, and the valve drive path 30c drives each valve in accordance with a control signal of the valve control unit 33.

Next, the ignition operation in the gas table 100 showing the first embodiment having the above configuration will be described based on FIG.

When the ignition operation is performed by the operation knob 2 and the ignition switch is turned on (YES in step 10), the ignition circuit 30B is driven, the ignition timer 31a is operated, and the original solenoid valve 13 is opened. Is started (step 102).

After step 102, a delay is performed by a 0.5 second timer (step 103), and then the respective solenoid valves 17 and 19 are opened (step 104), and the current value of the gas proportional valve 14 which was 0 mA in the initial state. Increase the current by only 1 mA to start energization (step 105).

The thermal power level in the ignition operation is set to thermal power level 5, and it is determined whether or not the current value of the gas proportional valve 14 reaches the current value 15 corresponding to this thermal power level 5.

If it is determined that the current value I5 of the thermal power level 5 has not been reached (No at step 106), a delay of 20 mS (step 107) is performed, and the flow proceeds to step 105, whereby the current value of the gas proportional valve 14 is increased by only 1 mA. do. The operation of increasing the current value of the gas proportional valve 14 by 1 mA every 20 mS is repeated until the current value I5 of thermal power level 5 is reached.

When the current value I5 of thermal power level 5 is reached (YES in step 106), the ignition detection is performed according to the electromotive force of the thermocouple 23, and a low value of 2.5 mV is set here as a reference voltage for the ignition detection. Sensitive ignition detection is possible.

When the output voltage of the thermocouple 23 does not reach the reference voltage (No in step 108), it is determined whether 10 seconds have elapsed since the ignition operation was started, and when 10 seconds did not pass (step 109). In step N0), the process proceeds to step 108 and repeats until 10 seconds have elapsed to determine whether or not the output voltage of the thermocouple 23 has reached the reference voltage.

If the output voltage of the thermocouple 23 does not reach the reference voltage until 10 seconds have elapsed since the start of the ignition operation (YES in step 109), the valves are closed and the ignition circuit 30B is operated. It stops and completes an ignition operation (step 110).

When the output voltage of the thermocouple 23 reaches the reference voltage (YES in step 108), if 5 seconds have elapsed since the start of the ignition operation (YES in step 11), driving of the ignition circuit 30B is stopped. It stops (step 112).

If 5 seconds have not elapsed since the start of the ignition operation (No in step 11), the apparatus waits until 5 seconds have elapsed, and when the 5 seconds have elapsed, the process proceeds to step 112 and the ignition circuit 30B is stopped. .

After step 112, a delay is performed by a 0.5 second timer (step 113), and thereafter, it is determined whether or not the current value of the gas proportionality valve 14 corresponds to the current level corresponding to the thermal power level by the operation knob 2.

If the current value is not the current value determined by the operation knob 2 (No in step 114), change the current value only 1Ma (step 115), wait 20 mS (No in step 116), and after 20 mS elapse (step In step 116, the process proceeds to Step 114, and the current value is repeatedly determined.

When the current value of the gas proportional valve 14 becomes a current value corresponding to the thermal power level based on the operation knob 2 (YES in step 14), combustion is continued (step 117), and each switch operation is performed as necessary. If so, it switches to the operating mode 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 by the operation knob 2 as shown in Fig. 9, regardless of the output information of the thermocouple 23. In the case of the hot start in which the ignition operation is performed immediately, even if the temperature of the thermocouple 23 has not sufficiently decreased, since the operation of the ignition circuit 30B does not go wrong and can be reliably stopped, the ignition operation can be surely performed.

In addition, since the wrong operation by the output information of the thermocouple 23 does not occur at hot start, the reference voltage for ignition detection can be set relatively low, and the sensitivity of ignition detection can be improved.

10 shows the ignition control operation according to the second embodiment of the present invention.

In the second embodiment, from step 201 to step 207, the ignition operation is performed as in step 101 in step 101 in the first embodiment, and the current value of the gas proportionality valve 14 is based on the operation of the operation knob 2. When the current value corresponds to a level (YES in step 206), the thermal coupler 23 is operated until the ignition operation starts and 5 seconds elapsed by the ignition timer 31a (No in step 208). After 5 seconds have elapsed from the ignition operation (YES in step 208) without discriminating the ignition based on the output voltage of < RTI ID = 0.0 > 1, the < / RTI > If the output voltage of 23 does not reach the reference voltage (No in step 209), the steps 209 and 210 are repeated until 10 seconds have elapsed since the ignition operation is started (No in step 210). Repeat and start the ignition operation. If the output voltage of the thermocouple 23 does not reach the reference voltage until the time elapses (YES in step 210), the valves are closed and the ignition circuit 30B is stopped at the same time. It ends (step 211).

If the output voltage of the thermocouple 23 has reached the reference voltage until 10 seconds have elapsed since the start of the ignition operation (YES in step 209), in step 216 in step 212, in the first embodiment In step l12, the operation of the ignition circuit 30B and the change of the current value of the gas proportional valve 14 are controlled in a predetermined sequence as shown in step 116, and then changed to a current value corresponding to the thermal power level by the operation knob 2. (YES in step 214), the thermal power control according to each operation mode is performed (step 217).

According to the above control operation, even in the second embodiment, the ignition detection is not determined by the output voltage of the thermocouple 23 until five seconds have elapsed from the start of the ignition operation. As described above, the ignition operation is surely performed at the hot start and the ignition detection sensitivity can be improved.

11 shows the operation of the third embodiment of the present invention.

In the third embodiment, unlike the ignition detection, the output voltage of the thermocouple 23 is detected when the ignition operation is started, and it is determined whether or not it is a hot start according to the output voltage, and the ignition circuit 30B is stopped accordingly. Take control.

The operation will be described below.

When the ignition operation is made (YES in step 301), it is determined whether or not the output voltage of the thermocouple 23 is equal to or higher than the discrimination voltage of hot start or not (YES in step 302). Immediately thereafter, it is determined as a hot start for which re-ignition operation has been performed, and the timer starts for 3 seconds (step 303), and the operation of the ignition circuit 30B is started (step 304).

After that, the timer waits for 3 seconds (No at step 305), and waits 3 seconds after the ignition circuit 30B is activated (YES at step 305). The operation is stopped (step 306).

On the other hand, when the output voltage of the thermocouple 23 does not reach the discrimination voltage (No in step 302), the operation of only the ignition circuit 30B is started without the above-described three-second timer (step 307). .

After that, it is determined whether or not the reference voltage for determining whether the output voltage of the thermocouple 23 has ignited or not is reached, and when the reference voltage is not reached (No in step 308), the operation of the ignition circuit 30B is performed. The determination of step 308 is repeated until the time reaches 10 seconds (No in step 309).

When the operation of the ignition circuit 30B ignites until more than 10 seconds, and the output voltage of the thermocouple 23 reaches the reference voltage (YES in step 308), the ignition circuit 30B The operation is stopped (step 306).

When the output voltage of the thermocouple 23 does not reach the reference voltage until 10 seconds is exceeded (YES in step 309), YES in the ignition circuit 30B irrespective of ignition detection, ignition detection Irrespective of this, the operation of the ignition circuit 30B is stopped (step 306). At this time, in the valve control performed separately, each valve is closed to stop the supply of fuel gas.

As described above, in the third embodiment, in the case of the hot start in which the output voltage of the thermocouple 23 is high when the ignition operation is performed, the thermocouple 23 is forcibly operated by the 3-second timer. There is no case where the operation of the ignition circuit 30B is stopped due to the ignition detection by the false output information of the ignition circuit.

Claims (2)

An ignition control apparatus of a combustor for starting an operation of an igniter provided in a burner to which fuel is supplied in relation to an ignition operation and stopping the operation of the igniter after a predetermined time, wherein the ignition control device is related to the ignition operation. An ignition stop to stop the operation of the igniter on the basis of the output information of the thermal power generation device after the timer is finished, and having a timer and a thermal power generation device heated by the burner. An ignition control device for a combustion device, characterized in that the operation. An ignition control apparatus of a combustor for starting an operation of an igniter provided in a burner to which fuel is supplied in relation to an ignition operation and stopping the operation of the igniter after a predetermined time, wherein the heater is heated by the burner. And a timer for time-limiting a predetermined time shorter than the predetermined time, and operating the igniter for the predetermined time indicated by activating the timer when the output information of the thermal-generation device is greater than or equal to a predetermined output during the ignition operation. And stop the operation of the igniter on the basis of the output information of the thermal power generator when the predetermined output is not reached.