JP2000161664A - Combustor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To raise the safety in use by performing the inspection, maintenance, or the like of the device at proper timing without deteriorating the convenience in use such as in the case of executing combustion-inhibition control each time incomplete combustion occurs. SOLUTION: In this device, the burning condition is judged to be abnormal if it occurs a set number of times that a controller C, which executes the combustion control of starting the combustion of a burner 3 when a combustion start command is issued, and stopping the combustion of the burner 3 when a combustion stop command is issued and the combustion emergency stop control of stopping the combustion, in accordance with the judgment of incomplete combustion condition, based on the detection information of the first thermocouple 17 for detecting the temperature of combustion flame, stops the combustion by the execution of the combustion emergency stop control after start of the burner 3. In this case, the combustion inhibition control is executed to inhibit the start of the combustion, regardless of the combustion start command, until a reset command is issued.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion flame temperature detecting means for detecting a temperature of a combustion flame of a burner, a combustion state commanding means for instructing a combustion start command and a combustion stop command, and controlling the combustion of the burner. Control means, wherein the control means starts combustion of the burner when a combustion start command is issued based on command information of the combustion state command means, and the burner starts when a combustion stop command is issued. Along with determining that the combustion state of the burner is an incomplete combustion state, based on the combustion control for stopping the combustion of the combustion burner and the detection information of the combustion flame temperature detecting means during the combustion of the burner, The present invention relates to a combustion device configured to execute combustion emergency stop control for stopping combustion of a burner.

[0002]

2. Description of the Related Art In the above-described combustion apparatus, conventionally, the control means discriminates the incomplete combustion and executes the combustion emergency stop control. Even if instructed, combustion inhibition control for inhibiting the start of combustion is executed.

[0003]

In the above conventional structure, for example, the concentration of unburned gas components such as carbon monoxide (CO) increases, and the space in which the combustion device is installed becomes oxygen-deficient.
If it is determined that the combustion flame of the burner has lifted or is in an incomplete combustion state, such as an unstable combustion state, the burner continues to operate in such an incomplete combustion state. Since it is not preferable from the viewpoint of safety in use, after such incomplete combustion is determined and the burner combustion is stopped in an emergency, the above-described combustion prohibition control is executed to thereby execute the combustion state command means. Even if a combustion start command is issued at, the start of burner combustion is prohibited, so that safety can be ensured. There was something to improve.

In the above configuration, it is determined that the combustion state of the burner is incomplete combustion state based on the detection information of the combustion flame temperature detecting means, that is, the temperature of the combustion flame of the burner. For example, even when the combustion state of the burner is only temporarily unstable due to the influence of the wind blown from the outside and it is not necessary to prohibit the combustion operation of the burner, the incomplete combustion state As a result, the combustion operation of the burner is prohibited, and there is a disadvantage that the usability is deteriorated.

Therefore, in order to eliminate the disadvantages described above and to ensure the safety in use without deteriorating the usability, it is necessary to continuously stop the combustion by executing the combustion emergency stop control for a predetermined number of times. It is also conceivable to execute the combustion prohibition control when it occurs. In such a configuration, although safety can be ensured by prohibiting continuous use of the combustion device in an apparent abnormal state in which incomplete combustion as described above occurs continuously, as described above. Although it has not reached an obvious abnormal state, it informs the user that the incomplete combustion is likely to occur and the equipment needs to be inspected and maintained, etc. It is preferable from the viewpoint of safety that an inspection or the like is performed before an abnormality occurs.

Therefore, the present invention has been made in view of such a point, and an object of the present invention is to solve the above-mentioned disadvantage in executing the combustion prohibition control every time incomplete combustion occurs, thereby improving the usability. Another object of the present invention is to provide a combustion device that can improve the safety in use by performing inspection and maintenance of the device at appropriate timing without deteriorating the performance.

[0007]

According to the configuration of the present invention, the control means starts the combustion of the burner based on the combustion start command and thereafter detects the combustion flame temperature during the combustion of the burner. When it is determined that the combustion state of the burner is an incomplete combustion state based on the detection information of the means,
Accordingly, the combustion emergency stop control for stopping the combustion of the burner is executed.However, when the combustion is stopped by the execution of the combustion emergency stop control as described above, when the set number of times occurs within the set time, an abnormal state is generated. Therefore, the combustion prohibition control is executed until the reset command is issued, and the start of combustion is prohibited regardless of the combustion start command by the combustion state command means.

For example, when incomplete combustion is determined due to a temporary factor, such as when the combustion state of the burner becomes unstable due to the blowing of outside air and the temperature of the combustion flame decreases, Since it is considered that the incomplete combustion state does not occur the set number of times within the set time, the combustion prohibition control is not executed for the incomplete combustion due to such a temporary factor.

When the incomplete combustion state occurs a set number of times within a set time, the state does not reach an apparent abnormal state where incomplete combustion occurs continuously, but incomplete combustion is likely to occur. There is a tendency that the inspection or maintenance of the apparatus is required. Therefore, it is necessary to stop the combustion by performing the combustion emergency stop control due to the occurrence of incomplete combustion, and it is necessary to check and maintain the device by executing the combustion prohibition control when the set number of times occurs within the set time. It is possible to notify the user of the abnormal state, and to perform an inspection or the like before reaching the above-mentioned obvious abnormal state.

As a result, the combustion prohibition control is not executed for incomplete combustion due to temporary factors such as wind blowing, so that the usability is not deteriorated, and the inspection and maintenance of the apparatus can be performed at an appropriate timing. Thus, it is possible to provide a combustion device that can improve the safety in use by performing the above.

[0011] According to the second aspect, the first aspect is provided.
The control means is configured not to execute the combustion emergency stop control within a combustion start-up time until a set time elapses after the combustion of the burner is started by the combustion start command.

During the combustion start-up time as described above, the detection state of the combustion flame temperature detecting means is not stable, and there is a great possibility that the temperature of the combustion flame of the burner cannot be properly detected and erroneous determination is made. is there. Accordingly, in such an unstable state of the operation, the combustion emergency stop control is not executed, so that the execution of the combustion prohibition control due to a malfunction is prevented, thereby preventing the usability from being deteriorated.

According to the third aspect of the present invention, there is provided the first aspect.
Or 2, a heat exchanger for hot water supply is provided on an upper part of a cylinder body forming a combustion chamber of the burner, a combustion chamber temperature detecting means for detecting an ambient temperature in the combustion chamber is provided, and the control means is provided. The system is also configured to execute the combustion emergency stop control also when a combustion abnormality is detected based on the detection information of the combustion chamber temperature detecting means.

In such a configuration in which the heat exchanger for hot water supply is provided, the combustion products (for example, soot) and dust of the burner are clogged between the heat exchangers by long-term use, and the combustion exhaust gas of the burner is appropriately used. In other words, a so-called exhaust gas obstruction state that does not flow to the air may occur. In this state, the combustion exhaust gas does not flow properly and fills the combustion chamber. As a result, the ambient temperature in the combustion chamber increases. Thus, it is possible to determine that the combustion is abnormal by detecting the temperature. Therefore,
The above combustion prohibition is also performed when a combustion abnormality due to exhaust gas blockage due to a heat exchanger clogging or the like in such a water heater is appropriately detected and the combustion emergency stop control is executed a set number of times within a set time due to such a cause. By executing the control, safety in use can be ensured.

According to the fourth aspect of the present invention, in the first aspect,
In any one of the configurations (1) to (3), the reset command can be issued by stopping supply of operating power from the power supply to the control unit.

When the combustion prohibition control is being executed, the combustion prohibition control is reset by stopping the supply of the operating power from the power supply to the control means. In other words, the combustion prohibition control is performed while the operating power is being supplied to the control means. Therefore, for example, compared to a configuration in which the control is reset in response to the combustion stop command of the combustion state command means, the safety is reduced. Performance can be improved.

According to the fifth aspect of the present invention, in the first aspect,
In any one of (a) to (d), a notifying means for notifying that the incomplete combustion state has occurred and that the combustion prohibition control is being performed is provided. Since it is possible to recognize that a combustion state has occurred and that the combustion prohibition control accompanying the determination of incomplete combustion has been performed, measures such as ventilation can be taken promptly, and safety in use can be improved. Performance can be improved.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A case where a combustion device according to the present invention is applied to a water heater will be described below with reference to the drawings. First, the overall configuration of the hot water supply device will be described with reference to FIG. A fin tube type heat exchanger for water heating 2 is provided at the upper end inside the cylinder 1, a burner 3 for heating the heat exchanger 2 is provided below the cylinder 1, and the burner 3 is provided inside the cylinder 1. A combustion chamber R is formed. Water supply channel W to heat exchanger 2
i, a water shutoff valve 4, a water governor 5 for adjusting a water supply amount in response to a change in water pressure, and a diverter valve 6 are provided. A hot water outlet Wo from the heat exchanger 2 is connected to a flexible pipe 7 And is connected to the tapping tool 8 via. The gas supply path G to the burner 3 is connected to the water governor 5 via the shut-off valve 9 and the interlocking rod 10a in response to a water pressure responsive valve 10 that opens only in a water supply state, and in response to a change in the original pressure of the fuel gas supply. A gas governor 11 for maintaining the fuel gas supply pressure to the burner 3 at an appropriate pressure, and an adjustment valve 12 for adjusting the fuel gas supply amount are provided. The shunt valve 6
The amount of water supplied to the heat exchanger 2 and the amount of bypass water to be separately supplied from the water supply channel Wi to the hot water channel Wo via the bypass channel Wb are adjusted. Further, a controller C is provided as a control means including a microcomputer for performing various controls of the hot water supply device.

The controller C is supplied with operating power from a dry battery Bt as a power source, and the supply of operating power to the controller C is continued unless the dry battery Bt is removed.

Next, the control operation of the controller C at the time of tapping and stopping water will be described. When the tapping-type tapping operation tool 13 is pressed to tap the tap, the operation microswitch 14 is pressed.
Is turned on, and at the same time, the water stop valve 4 is opened in conjunction with the pushing operation of the tapping operation tool 13, the water enters the water governor 5, and the interlocking rod 10a opens the water pressure responsive valve 10 by the water pressure. In response, the hydraulic micro switch 15 is turned on. When the operation microswitch 14 and the hydraulic microswitch 15 are turned on, the controller C causes the spark plug 16 to spark and causes an attraction current to flow through the coil 9a of the shutoff valve 9, so that the shutoff valve 9 is opened. Therefore, the fuel gas is
Shut-off valve 9, water pressure responsive valve 10 opened by interlocking rod 10 a responsive to water pressure, gas governor 11, and regulating valve 12
Is supplied to the burner 3 and ignited by the spark of the spark plug 16 to burn. A first thermocouple 17 for outputting an electromotive force corresponding to the temperature of the combustion flame is provided in a state where the thermocouple is brought into contact with the combustion flame of the burner 3, and the electromotive force of the first thermocouple 17 heated by the combustion flame of the burner 3 is provided. Accordingly, the adsorption current continues to flow from the controller C to the coil 9a of the shutoff valve 9, and the opening of the shutoff valve 9 continues. On the other hand, the water flows through the water stop valve 4, the water governor 5, and the flow dividing valve 6, flows into the heat exchanger 2, and at the same time, flows through the bypass path Wb to the hot water path Wo. Then, the hot water from the heat exchanger 2 and the water from the bypass passage Wb are mixed, and the hot water at an appropriate temperature is discharged from the tapping tool 8.

When the tapping operation tool 13 is pressed in the tapping state to stop water, the water stop valve 4 is closed and water supply is stopped in conjunction with the pushing operation, and the water governor 5 loses the water pressure difference. The interlocking rod 10a responds in a direction to close the hydraulic pressure responsive valve 10, the hydraulic pressure responsive valve 10 is closed, the fuel gas supply to the burner 3 is cut off, and the combustion of the burner 3 is stopped. With the pushing operation of the tapping operation tool 13 in the tapping state described above,
Operation micro switch 14 and hydraulic micro switch 1
When the switch 5 is turned off, the controller C stops flowing the adsorption current to the coil 9a, so that the shut-off valve 9 is closed.

Therefore, the operation of turning on both the operation microswitch 14 and the hydraulic microswitch 15 in response to the pushing operation of the tapping operation tool 13 corresponds to a combustion start command. An operation in which both the operation microswitch 14 and the hydraulic microswitch 15 are turned off in response to the pressing operation of the tapping operation tool 13 again corresponds to a combustion stop command. That is,
Operation micro switch 14 and hydraulic micro switch 15
These form the combustion state command means NS.

Next, if a combustion abnormality occurs in the burner 3,
The configuration of the safety means that is executed when an abnormality such as exhaust blockage of the heat exchanger 2 occurs will be described. The above-described first thermocouple 17 as a combustion flame temperature detecting means for outputting an electromotive force according to the temperature of the combustion flame of the burner 3, and has a polarity opposite to that of the first thermocouple 17 according to the temperature of the combustion chamber R. A second thermocouple 21 serving as a combustion chamber temperature detecting means for outputting a strong electromotive force, a nozzle vicinity temperature fuse 19 which is blown when the temperature in the vicinity of the gas nozzle 18 becomes abnormally high, and an outer periphery of the cylinder 1 A temperature fuse 20 for the cylinder body is provided which is blown when the temperature in the vicinity becomes abnormally high.

The first thermocouple 17 uses a metallic thermocouple mounting plate so that the heat-sensitive portion is located inside the combustion flame in a normal combustion state, and the plus side thereof is electrically connected to the thermocouple mounting plate. It is provided to be connected. The second thermocouple 21 is
The heat sensing portion is provided so as to face a temperature measurement opening 1 a formed in the cylinder body 1.

The thermal fuse 19 for the vicinity of the nozzle and the thermal fuse 20 for the cylinder body have the same configuration, and although not shown, a fuse element having lead wires connected to both ends thereof is made flexible and heat resistant. The temperature fuse 19 for the vicinity of the nozzle is located below the gas nozzle 18 corresponding to the burner 3 while being inserted into the tube and having the outer periphery of the tube bound with a binder and fixed in the tube. The temperature fuse 20 for the cylinder body is arranged in the vicinity of the rear side of the outer peripheral portion of the cylinder body 1 (the wall surface side when the hot water supply device is installed on a wall surface).

As shown in FIG. 2, the negative terminal of the first thermocouple 17 and the temperature fuse 1 for the vicinity of the nozzle are used.
9. Each of the cylinder body thermal fuse 20 and the minus terminal of the second thermocouple 21 are connected in series, and the plus terminal of the first thermocouple 17 and the minus terminal of the second thermocouple 21 are connected to the controller C, respectively. They are connected to input terminals a and b. In other words, the total value Vt of the electromotive forces of the thermocouples 17 and 21 is input to the input terminals a and b so that the second thermocouple 21 has an electromotive force having a polarity opposite to that of the first thermocouple 17. Make up.

Then, the controller C includes the first thermocouple 1
7, and the second thermocouple 21
It is configured to determine the operation abnormality based on the detection information of the electromotive force due to. More specifically, for example, in a steady combustion state, the controller C causes the total value Vt (input between the input terminals a and b) as shown in, for example, FIG. When the electromotive force becomes lower than the steady-state electromotive force determination level Vst, it is determined that the operation is abnormal, and the flow of the attraction current to the coil 9a of the shutoff valve 9 is stopped, and the shutoff valve 9 is closed. Thus, the combustion emergency stop control for stopping the combustion of the burner 3 is executed.

If the amount of the primary air for combustion sucked from the receiving port 32 becomes abnormally small, or if the oxygen concentration in the primary air for combustion abnormally decreases, the burner 3 causes incomplete combustion and the combustion flame is generated. become longer. If the burner 3 causes such incomplete combustion as an operation abnormality to prolong the combustion flame or unexpectedly extinguish the combustion flame, the first burnout may occur.
When the electromotive force V1 of the thermocouple 17 decreases, as shown in FIG. 3A, the total value Vt decreases and falls below the electromotive force determination level Vst for steady operation. C closes the shut-off valve 9 and sets the burner 3
Then, the supply of the fuel gas to the burner 3 is stopped, and the combustion of the burner 3 is stopped.

Further, when the combustion products and dust in the combustion gas adhere to the heat exchanger 2 and the combustion gas passage of the heat exchanger 2 becomes narrow, the amount of the combustion gas remaining in the combustion chamber R increases. hand,
The ambient temperature in the combustion chamber R increases. Due to such exhaust blockage, the ambient temperature in the combustion chamber R increases, and high-temperature combustion gas flows out of the temperature measurement opening 1a, and as shown in FIG. Although V2 becomes large, the electromotive force V2 has the opposite polarity to the electromotive force V1 of the first thermocouple 17, so that the total value Vt becomes small. When the ambient temperature in the combustion chamber R becomes abnormally high, the total value Vt falls below the electromotive force determination level Vst for steady-state operation. Closes the shut-off valve 9 to stop the combustion of the burner 3.

The atmosphere temperature in the combustion chamber R abnormally rises due to the adhesion of the combustion products and dust in the combustion gas to the heat exchanger 2, and the temperature near the outer periphery of the cylinder 1 is increased. When the temperature becomes abnormally high, the temperature fuse 20 for the cylinder body is blown.
Further, a spider's web or dust accumulates in the receiving port 32 of the burner 3, and a part of the fuel gas ejected from the gas nozzle 18 leaks out of the receiving port 32. When the temperature in the vicinity of the gas nozzle 18 becomes abnormally high due to, for example, igniting and burning by the combustion flame of No. 3, the nozzle near-temperature fuse 19 is blown. When the temperature fuse 20 for the cylinder body is blown or the temperature fuse 19 for the vicinity of the nozzle is blown in this way, the total value (electromotive force input between the input terminals a and b) becomes substantially zero,
The controller C closes the shut-off valve 9 to stop the burner 3 from burning.

After starting the combustion of the burner 3 based on the combustion start command, the controller C stops the combustion by executing the combustion emergency stop control when the set number of times occurs within the set time. Until the reset command is issued, it is configured to execute the combustion prohibition control for prohibiting the start of combustion of the burner 3 irrespective of the combustion start command. In addition, in FIG.
That the incomplete combustion state as described above has occurred, and
An abnormality notification lamp as notification means for notifying that the above-described combustion prohibition control is being executed.

Hereinafter, the control operation of the controller C will be described with reference to the flowchart shown in FIG. First,
When the dry battery Bt is mounted at a predetermined mounting location and the power is turned on to the controller C, the count value N as described later is reset to zero (steps 1 and 2). Then, the count value N is not equal to or more than "3" (the count value is zero immediately after the power is turned on, so that the count value is zero). 15 are both turned on and a combustion start command is issued (step 3,
4) Burning of the burner 3 is executed by executing the process of igniting the burner 3 and the process of maintaining the opening of the shut-off valve 9 (steps 5 and 6). After the combustion of the burner 3 is started, if a combustion stop command is issued in a state where incomplete combustion is not determined, the shut-off valve 9 is closed to stop the combustion of the burner 3 (steps 7, 8, 9). The operations from step 4 to step 9 correspond to combustion control.

After the combustion of the burner 3 is started, when the total value Vt of the thermocouples 17 and 21 drops below the electromotive force determination level Vst for steady operation and it is determined that the combustion is incomplete (step 7). ), The shut-off valve 9 is closed and the burner 3
Is stopped (step 10). Then, the combustion stop of the burner 3 (emergency combustion stop control) based on the determination of the incomplete combustion is performed after a set time ts has elapsed since the combustion start command was issued (after the combustion of the burner 3 was started). If executed, the count value (count value N) of the counter is counted up (steps 11 and 1).
2), if the count value N is “1”, that is,
If the first emergency combustion stop control is executed after the count value is reset, the timer starts counting for one week (steps 13 and 14). Also, the abnormality notification lamp 22
Is turned on to notify that the incomplete combustion state has occurred (step 15).

It should be noted that the combustion stop of the burner 3 (emergency combustion stop control) based on the determination of the incomplete combustion as described above is performed for a set time ts after the combustion start command is issued (after the combustion of the burner 3 is started). Is executed before elapse, the process returns to step 3 without counting up the count value N (step 11). For example, as shown in FIG. 3, the electromotive force output from the first thermocouple 17 is not stable until the set time ts elapses after the combustion of the burner 3 is started. In an unstable state, the determination of incomplete combustion is not performed. Therefore,
After the combustion of the burner 3 is started by the combustion start command, the controller C does not execute the combustion emergency stop control within the combustion start-up time until the set time ts elapses.

When the combustion of the burner 3 is stopped along with the determination of incomplete combustion as described above, the water shutoff valve 4 is maintained in the open state. The hot water supply state (water supply state) is continued, and thereafter, the hot water supply user operates the hot water supply operation tool 13 to stop the hot water supply (water supply).

After the tapping is stopped, the operation waits until a combustion start command, that is, the operation microswitch 14 and the water pressure microswitch 15 associated with the pushing operation of the tapping operation tool 13 are turned on (step 3). 4)
When the one-week timer expires (one week has passed since the first emergency combustion stop control was executed), the count value N is reset to "0" (step 16,
2). If the counter value N becomes equal to or more than "3" before the one-week timer expires, that is, the combustion emergency stop control accompanying the above-described incomplete combustion determination is performed within a set time (one week). When the set number of times (three times) has occurred, a combustion prohibition state in which the combustion start operation is not performed regardless of the combustion start command as described above is set (step 3).
Such control corresponds to combustion inhibition control. Such a combustion prohibition control state continues until the controller C is reset, that is, until the dry battery Bt as a power supply is removed from a predetermined mounting position (steps 1 and 2).

Accordingly, the combustion prohibition control is executed until the reset command is issued by stopping the supply of the operating power from the power source (dry battery Bt) to the controller C, so that the burner 3 is inadvertently burned in an incomplete combustion state. Is not started, and safety in use can be ensured. In addition, since the combustion inhibition control is performed only after the incomplete combustion occurs a set number of times within the set time, the combustion is determined only once by the determination of the incomplete combustion due to a temporary factor such as blowing of outside air. There is no disadvantage such as prohibition, and there is little possibility that usability will be reduced.

If the combustion emergency stop control accompanying the determination of incomplete combustion does not occur a predetermined number of times (three times) before the timer expires for one week, the count value N is reset. The combustion prohibition control is executed only when the set number of times (three times) has occurred within the set time (one week).

[Another Embodiment] (1) In the above embodiment, the combustion emergency stop control based on the determination of incomplete combustion is performed for a set number of times (3 times) within a set time (1 week).
Times), the combustion prohibition control is executed. However, the set time is not limited to “one week”, but may be several hours,
It may be several days, ten days or more, and the set number is not limited to “3” but may be “2” or “4” or more. Not limited.

(2) In the above-described embodiment, the alarm means notifies the occurrence of the incomplete combustion state and the execution of the combustion prohibition control by one abnormality notification lamp 22. However, a configuration may be adopted in which a lamp for notifying that an incomplete combustion state has occurred and a lamp for notifying that combustion inhibition control is being performed are separately provided. In addition, in addition to such a lamp, or in place of the lamp, if the configuration is to notify by the sound of a buzzer,
Even if the user is away from the water heater, the abnormality can be easily recognized. The notifying means is not limited to a lamp or a buzzer, but may be a notifying means such as graphic display or character information.

(3) In the above-described embodiment, the configuration is such that the reset command is issued to the controller by removing the dry battery Bt as a power supply. However, instead of such a configuration, for example, the hot water supply in the power supply circuit is performed. A power switch that can be turned on and off in conjunction with the operation of the operating tool is provided, and a self-holding circuit that can open and close the circuit in response to a command from the controller is provided in parallel with this power switch, and self-holding during normal operation With the circuit open, the power switch is turned off to eliminate power consumption during operation standby,
When the incomplete combustion is detected, the self-holding circuit may be closed to execute the combustion inhibition control based on the counter value.

(4) In the above embodiment, the first thermocouple 17 and the second thermocouple 21 are connected in series, and only the total value of the electromotive force is input to the controller. However, instead of such a configuration, the detection information of the electromotive force by the first thermocouple 17,
Further, the detection information of the electromotive force by the second thermocouple 21 is configured to be obtained separately, and the abnormal combustion operation of the burner and the exhaust gas blockage of the heat exchanger are separately detected based on the respective detection information. You may do so.

For example, as shown in FIG. 5, both ends of each of the thermocouples connected in series and an intermediate connection point are electrically connected to a controller C (control means) so that the electromotive force of each thermocouple can be reduced. The total output value and the output value of the electromotive force of the first thermocouple 17 are configured to be input, or the first thermocouple 17 and the second thermocouple 21 are connected to the controller C as shown in FIG. (Control means) is configured to be electrically connected in parallel so that the electromotive force can be separately detected independently of each other, so that the detection information of the electromotive force by the first thermocouple 17 and the second The detection information of the electromotive force by the thermocouple 21 may be obtained separately, and the abnormal combustion operation of the burner and the exhaust gas blockage of the heat exchanger may be separately detected based on the respective detection information.

(5) In the above embodiment, the abnormality in the operation of the burner is detected by detecting the abnormality of the combustion operation of the burner and the exhaust gas obstruction of the heat exchanger, respectively. May be determined.

(6) In the above embodiment, although the temperature fuse 19 for the nozzle vicinity and the temperature fuse 20 for the cylinder body are provided to further improve the safety in use, such a fuse is not used. You may.

(7) In the above embodiment, the case where the specific configuration of the combustion device to which the present invention is applied is a hot water supply device is illustrated. However, the specific configuration of the combustion device can be variously changed.
For example, a heating device may be used.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram of a hot water supply apparatus to which the present invention is applied.

FIG. 2 is a control block diagram.

FIG. 3 is a diagram showing an electromotive force generation state;

FIG. 4 is a flowchart of a control operation.

FIG. 5 is a circuit diagram showing a connection state of a thermocouple of another embodiment.

FIG. 6 is a circuit diagram showing a connection state of a thermocouple of another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cylinder 2 Heat exchanger 3 Burner 17 Combustion flame temperature detection means 21 Combustion chamber temperature detection means 22 Notification means C Control means R Combustion chamber NS Combustion state command means

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Shigenobu Okuda 4-1-2, Hirano-cho, Chuo-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd. (72) Inventor Satoru Awane 1-1-1, Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka No. 52 Harman Co., Ltd. (72) Inventor Akira Takabayashi 1-152 Oka, Minami-ku, Minato-ku, Osaka-shi, Osaka No. 72 Inventor Masahiko Yagi 1-152 Oka, Minami-shi, Minato-ku, Osaka, Osaka No. Harman Co., Ltd. (72) Inventor Akinori Morita 1-152 Oka, Minami-shi, Minato-ku, Osaka-shi, Osaka F-term in Harman Co., Ltd. (reference) 3K003 SA00 SB07 SC04

Claims (5)

[Claims] 1. A combustion flame temperature detection means for detecting a temperature of a combustion flame of a burner, a combustion state command means for instructing a combustion start command and a combustion stop command, and a control means for controlling the combustion of the burner. The control means starts combustion of the burner when a combustion start command is issued, and stops combustion of the burner when a combustion stop command is issued, based on the command information of the combustion state command means. Stopping the combustion of the burner in accordance with the control and determining that the combustion state of the burner is an incomplete combustion state based on the detection information of the combustion flame temperature detecting means during the combustion of the burner. A combustion device configured to execute a combustion emergency stop control, wherein the control means starts combustion of the burner based on the combustion start command, and then performs the combustion by the combustion. When the stop by the execution of the normal stop control is performed for a set number of times within the set time, it is regarded as an abnormal state. A combustion device configured to execute a combustion prohibition control for prohibiting the combustion. 2. The control means is configured not to execute the combustion emergency stop control within a combustion start-up time until a set time elapses after combustion of the burner is started according to the combustion start command. 2. The combustion device according to claim 1, wherein: 3. A heat exchanger for hot water supply is provided on an upper part of a cylindrical body forming a combustion chamber of the burner; a combustion chamber temperature detecting means for detecting an ambient temperature in the combustion chamber is provided; The combustion apparatus according to claim 1 or 2, wherein the combustion emergency stop control is executed even when a combustion abnormality is detected based on detection information of the combustion chamber temperature detection means. 4. The combustion apparatus according to claim 1, wherein the reset command is issued by stopping supply of operating power from a power supply to the control unit. 5. The notification device according to claim 1, further comprising a notification unit configured to notify that the incomplete combustion state has occurred and that the combustion inhibition control is being performed. Combustion equipment.