JP2003185133A - Combustion device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a non-ignition error from occurring due to the defective position of a damper at the time of igniting operation in a combustion device of vaporization system in which liquid fuel is once vaporized. <P>SOLUTION: A reigniting operation for igniting by an igniting means 24 by re-operating a blower 17 and a flow pump 27 when ignition is performed by an igniting operation and a re-reigniting operation for igniting by the igniting means by operating the blower 17 and the flow pump 27 after the damper is moved to a closed position when an ignition detection part 23 does not detect ignition by the reigniting operation are performed to prevent the non-ignition error due to the defective position of the damper 18 from occurring. Thus the frequencies of inspections and repair by exclusive agencies performed due to occurrence of non-ignition error can be reduced to improve the easiness of handling. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device used for a water heater and a heating device.

[0002]

2. Description of the Related Art Conventionally, in this type, as disclosed in, for example, Japanese Unexamined Patent Publication No. Hei 8-21606,
In a vaporization-type combustion device that once vaporizes and burns liquid fuel, the heater is energized to heat the vaporizer at the time of ignition operation, and when a predetermined temperature is reached, the blower operates to supply combustion air, Next, the fuel pump operates and is sprayed from the nozzle to the vaporizer, and the vaporized fuel and primary air are mixed and ejected from the primary flame mouth.At that time, the igniter discharges and the mixture is ignited to start combustion. It was something to do.

At the time of this ignition operation, the air blower is operated with the damper, which is the air adjusting means, closed to close the air blow passage, so that the combustion air amount can be reduced even if the blower has a large number of revolutions. As a result, it is possible to maintain a high blast pressure at the time of ignition, and thereby prevent backfire due to a sudden rise in furnace pressure due to backwind or ignition.

In this conventional combustion apparatus, when the ignition operation is performed and the ignition is not detected, the fuel pump and the igniter are operated again to perform the re-ignition operation, and when the ignition is not detected, the fuel pump When the igniter is activated again and the ignition is performed again, if no ignition is detected, it is judged as an unignition error, all operations including ignition operation are stopped, and the unignition error is displayed. I had to ask a specialist to carry out inspections and repairs.

[0005]

By the way, in this prior art, a stepping motor is used as a drive motor for driving the damper, or a strong wind is introduced from the exhaust port due to strong wind to temporarily cause strong backwind. Is temporarily out of step, the ignition operation is performed while the damper is not operating to the predetermined position, and if it is not ignited by it, in the subsequent re-ignition operation and re-ignition operation,
Since the fuel pump and igniter are operated, the damper will perform re-ignition operation or re-ignition operation without operating to the specified position, eventually resulting in an unignition error and all operations including ignition operation. However, there was a drawback that the engine was stopped, an unfired error was displayed, and a specialist contractor had to perform inspection and repair. Therefore, in the present invention, the above problem is solved, and due to temporary strong back wind, step-out of the drive motor for driving the damper, etc., the ignition operation is performed while the damper is not operating to a predetermined position, resulting in unignition. Even in the case of the above, the present invention provides a combustion device capable of preventing a non-ignition error due to a defective position of the damper.

[0006]

The present invention focuses on this point and solves the above-mentioned drawbacks. In particular, according to claim 1, a blower for supplying combustion air and a fuel jet nozzle for supplying fuel oil are provided. Flow rate pump, a vaporizer that vaporizes the fuel oil supplied from the fuel injection nozzle and premixes the vaporized fuel oil with the combustion air from the blower, and guides the combustion air from the blower to the vaporizer. A blower duct, a damper in the blower duct for varying the cross-sectional area of the blower duct, a combustor for burning the premixed gas premixed by the vaporizer, and an ignition of the premixed gas in the combustor. An ignition unit and an ignition detection unit for detecting that the premixed gas is ignited in the combustion unit are provided, and after the damper is moved to the closed position, the blower and the flow rate pump are operated to generate the premixed gas. , Igniting it with ignition means In the combustion device that operates, when the ignition detection unit does not detect ignition in the ignition operation, the blower and the flow rate pump are restarted to ignite by the ignition means, and the ignition is performed in the re-ignition operation. When the detector does not detect ignition, the damper is moved to the closed position, and then the blower and the flow rate pump are operated to perform the re-ignition operation in which the ignition means ignites.

In the combustion apparatus according to claim 2 of the present invention,
In particular, when the ignition detection unit does not detect ignition in the re-ignition operation, it is determined that an unignition error has occurred and the system is brought into a complete stop state, and an error display signal is output. A control unit for outputting and a display unit for displaying an error by an error display signal output by the control unit are provided.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION According to the combustion apparatus of claim 1 having the above-mentioned structure, a blower 17 for supplying combustion air,
A flow rate pump 27 for supplying fuel oil to the fuel injection nozzle 3,
A vaporizer 1 that vaporizes the fuel oil supplied from the fuel injection nozzle 3 and premixes the vaporized fuel oil with the combustion air from the blower 17, and guides the combustion air from the blower 17 to the vaporizer 1. Blower passage 16, a damper 18 in the blower passage 16 for varying the cross-sectional area of the blower passage 16, and a combustion unit 11 for burning the premixed gas premixed in the carburetor 1.
And an ignition means 24 for igniting the premixed gas of the combustion section 11.
And an ignition detection unit 23 for detecting that the premixed gas is ignited in the combustion unit 11, the damper 18 is moved to the closed position, and then the blower 17 and the flow rate pump 16 are operated to operate the premixed gas. In the combustion device for performing the ignition operation in which the ignition is generated by the ignition means 24, when the ignition detection unit 23 does not detect the ignition in the ignition operation, the blower 17
And the flow rate pump 27 are re-operated to ignite by the igniting means 24, and when the ignition detector 23 does not detect ignition in the re-ignition operation, the damper 18 is moved to the closed position. The blower 17 and the flow rate pump 27 are operated to perform the re-ignition operation in which the ignition means ignites.

As a result, the damper 18 is activated in the first ignition operation.
If it is not ignited even if it is in the predetermined position during the ignition operation, it will perform a quick re-ignition operation to ignite, so combustion will be started after hot water supply is required by opening and closing the faucet etc. It is possible to shorten the time until the start.

In the first ignition operation and the re-ignition operation, if the damper 18 is not ignited because it has not moved to the predetermined position for closing the air passage 16 for some reason, the damper 1
Since the ignition operation for re-operating 8 is performed to ignite, it is possible to prevent the occurrence of the non-ignition error due to the position error of the damper 18, and to reduce the inspection and repair by the specialist due to the occurrence of the non-ignition error and improve the usability. Is.

According to the combustion apparatus of the second aspect of the present invention, in the combustion apparatus of the first aspect, when the ignition detecting section 23 does not detect ignition in the re-ignition operation, an unignition error occurs. Judgment and make all stop state,
A control unit 42 that outputs an error display signal, and the control unit 42
And a display section for displaying an error in accordance with the error display signal output by.

As a result, the unignited error is not generated simply due to the position error of the damper 18, but the unignited state is caused due to other causes, but the user repeats the ignition operation in that state to damage the combustion device. It is possible to prevent it from operating or to operate it in an abnormal state. Also, at the time of inspection and repair by a specialist, the repairer knows that the unfired error is not simply caused by the position error of the damper 18, so the unfired error The cause of occurrence of can be identified quickly, and inspection / repair time can be shortened.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an example in which the combustion apparatus according to the present invention is applied to a water heater will be described with reference to an embodiment shown in the drawings. Reference numeral 1 denotes a vaporizer made of aluminum die-cast, which is vertically erected and has a heater 2 for casting, which is a U-shaped sheathed heater, cast in the upper and lower portions thereof to vaporize fuel oil supplied from a fuel injection nozzle 3. And is mixed with the primary air for combustion supplied from the jet port 5 at the tip of the guide passage 4 that hangs down the fuel injection nozzle 3 to form a premixed gas.

Reference numeral 6 denotes a mixing chamber, also made of aluminum die cast, which communicates with the carburetor 1 through a communication port 7 at the bottom of the carburetor 1, and an auxiliary heater 8 which is energized only for a certain time during preheating is cast at the bottom. The mixed gas from the vaporizer 1 is rectified and mixed by flowing through the tapered portion 9 on the rear side of the vaporizer 1,
The premixed gas from the mixing chamber 6 is jetted separately into a plurality of flame holes 10 arranged in a line.

Reference numeral 11 denotes a combustion section formed in the upper part of the mixing chamber 6 on the rear side of the vaporizer 1, and communicates with the premixed gas from the mixing chamber 6 and the air chamber 13 between the mixing chamber 6 and the outer frame 12. Flame hole 1
The secondary combustion air supplied from the secondary air holes 14 provided alternately adjacent to 0 is burned in the combustion chamber 15.

Reference numeral 16 designates the combustion air from the blower 17 as primary
An air blow path that supplies secondary air to the combustion unit 10, and an inverse L-shaped damper 18 that controls the rotation speed of the blower 17 and controls the combustion air amount by varying the cross-sectional area of the air blow path 16 is provided in the middle. There is.

The damper 18 is driven by a stepping motor 20 which receives a drive pulse and rotates a drive shaft 19 to which the lower end of the damper 18 is fixed, so that the blower passage 16 is closed in a small thermal combustion including ignition. Standing up, the air duct 1
6 is a ventilation area of only the ventilation gap 21 on the outer periphery of the damper 18 and a plurality of ventilation holes 22 provided on the extension of the guide path 4, and is for reducing the combustion air amount while increasing the blowing pressure. Then, the combustion air amount is changed according to the opening degree.

Further, the stepping motor 20 includes a damper 1
Even when the drive pulse is further input in the closing and opening directions in the 8 closed state and the maximum open state, the drive shaft 19 does not slip and the stepping motor 20 does not break down.

Reference numeral 23 is an ignition detecting section composed of a frame rod. When a flame is formed in the flame hole portion 10 by ignition of the ignition means 24 composed of an igniter, an electric current flows by contacting the flame to detect ignition. It is a thing.

Reference numeral 25 is an auxiliary tank for temporarily storing the fuel oil pumped up by the oil supply pump 26, and supplies an appropriate amount of fuel oil from the fuel injection nozzle 3 to the vaporization section 1 via the oil feed pipe 28 by driving the flow rate pump 27. .

Reference numeral 29 is a heat absorbing fin projecting toward the combustion portion 11 on the rear surface of the carburetor 1, 30 is a stopper of the damper 18, and 31 is a shaft supporting portion for supporting the drive shaft 19.

Reference numeral 32 denotes an air supply port opened in a water heater body 33 of an outdoor type, which is used to suck combustion air from the outside of the water heater body 33 by the rotation of the air blower 17 and supply it to the air passage 16.

A heat exchanger 34 is located above the combustion chamber 15 and is provided with a plurality of fins 35 for exchanging heat with the combustion gas rising from the combustion chamber 15 and a heat transfer tube 36 and wound around the outer circumference. The hot water supply pipe 37 and the hot water supply pipe 38 are connected to a pipe (not shown) outside the water heater main body 33 to supply hot water to an appropriate place.

Reference numeral 39 denotes an exhaust passage for discharging exhaust gas, which is generated by combustion in the combustion chamber 15 and has undergone heat exchange in the heat exchanger 34, to the outside of the water heater main body 33. One end of the exhaust passage is in close contact with the upper end of the combustion chamber 15 and A discharge port 40 that opens to the outside is provided at the final end.

Reference numeral 41 denotes the blower 17 in the middle of the exhaust passage 39.
A part of the exhaust gas is sucked by the suction force of the blower 17, is mixed with the combustion air, is supplied to the combustion chamber 15 and is re-combusted by a recirculation pipe communicating with the air supply port 32 of It reduces the occurrence.

Next, a block diagram of an electric circuit according to an embodiment of the present invention will be described. As shown in FIG. 6, reference numeral 42 is a control unit having various functions such as comparison, calculation, storage, and timer. The operation switch 43, which is provided in the remote controller of the machine, does not issue a combustion instruction but controls the supply of power to the equipment, the flow sensor 44 that detects running water by opening and closing the faucet and issues a combustion instruction, and the stop hold state due to an error occurrence. A reset switch 45 to be released is connected.

On the output side of the control unit 42, the heater 2 for heating, the blower 17, the ignition means 24, and the flow pump 27.
And the damper 18 are connected via the stepping motor 20. During the hot water supply operation, the opening degree of the damper 18 is controlled along with the rotation speed control of the blower 17 and the fuel oil supply amount control of the flow rate pump 27 according to the required heat amount. The control unit 42 outputs a reset signal to the damper 18 when the operation switch 43 is ON and the heating heater 2 is energized and the flow sensor 44 detects running water. The stepping motor 20 is driven to the closing side by a predetermined drive pulse, and the blower 17 and the flow rate pump 27 are operated before the ignition means 24 is operated.

Next, the operation of the embodiment of the present invention will be described with reference to the flow chart shown in FIG. First, when the operation switch 43 provided on the remote controller of the water heater is turned on (S1), the heating heater 2 is turned on (S1).
2) When the carburetor 1 reaches a predetermined temperature at which the fuel oil supplied from the fuel injection nozzle 3 is sufficiently vaporized (S3), it is checked whether the flow sensor 44 detects running water due to opening / closing of the faucet (S4). If the sensor 44 does not detect, it is determined that hot water supply is not yet required, and it is checked whether the operation switch 43 is turned off next. (S5)

At (S5), the operation switch 43 is turned on.
If the state is still maintained, the carburetor 1 controls the energization of the heating heater 2 for maintaining the predetermined temperature so that the hot water supply operation can be immediately started (S6), and returns to (S4), or (S5). If the operation switch 43 is turned off in step S4, it is determined that hot water supply is not required for a while, and the energization of the heating heater 2 is stopped (S7), and then (S1).
To return to.

Further, in (S4), when the flow sensor 44 detects running water due to the opening / closing of the faucet, the stepping motor 20 for driving the damper 18 is provided with a drive pulse so that the damper 18 closes the air passage 16. Output a number (S8),
When the output drive pulse reaches the specified number (S9),
As shown in FIG. 2, it is determined that the damper 18 has finished moving to the predetermined position where the air passage 16 is closed (S10), the blower 17 and the flow rate pump 27 are driven (S11), and the igniter is operated. The ignition means 24 is operated. (S
12)

Therefore, when the ignition detection unit 23 detects ignition (S13), normal hot water supply operation control is performed as shown in FIG. 1 (S14), and the ignition detection unit 23 does not detect ignition in (S13). When it is determined that the ignition has not occurred, the blower 17 and the flow rate pump 27 are stopped first (S15), and then it is checked whether the ignition means 24 has operated once (S16).
If the ignition means 24 has operated once, it is determined that the re-ignition operation is to be performed, the process returns to (S11), the blower 17 and the flow rate pump 27 are driven again, and the ignition means 24 composed of an igniter is operated. It is a thing. (S12)

In the re-ignition operation, the damper 18 has moved to a predetermined position for closing the air passage 16 as shown in FIG. As in the operation, the blower 17 and the flow rate pump 27 are restarted, and then the ignition means 24 is operated.

When the ignition detecting section 23 does not detect ignition even after performing the second ignition operation, that is, the re-ignition operation (S13), it is determined that the ignition is not performed, and the blower 17 and the flow rate pump 27 are used. And (S15), and then ignition means 2
4 is operated once (S16), and when the ignition means 24 is not operated once, it is checked whether the ignition means 24 is operated twice (S17), and the ignition means 24 is operated.
If is operated twice, it is determined that the ignition operation is performed again, the process returns to (S8), and the damper 18 outputs the specified number of drive pulses to the stepping motor 20 so that the blower path 16 is closed. When the output drive pulse reaches the specified number (S9), it is determined that the damper 18 has finished moving to a predetermined position where the air passage 16 is closed as shown in FIG. 2 (S9).
10) Next, the blower 17 and the flow rate pump 27 are driven (S11), and the ignition means 24 composed of an igniter is operated. (S12)

This is because, in the re-ignition operation, the damper 18 causes something, for example, strong wind causes the wind to enter from the discharge port 40 to temporarily become a strong backwind, or the stepping motor 20 temporarily loses the step. As shown in FIG. 3, the damper 18 has not moved to a predetermined position that closes the air passage 16 due to damage or the like, so that the ignition did not satisfactorily, unlike the conventional re-ignition operation. First, the stepping motor 2 that drives the damper 18
At 0, the damper 18 outputs a specified number of drive pulses so as to close the air passage 16 (S8), and when the output drive pulse reaches the specified number (S9), the air passage 16 is closed. It is determined that the damper 18 has finished moving to the predetermined position (S10), the blower 17 and the flow rate pump 27 are then driven (S11), and the ignition means 2 including an igniter is used.
4 is operated. (S12)

When the ignition detecting section 23 does not detect ignition even after performing the third ignition operation, that is, the second ignition operation (S13), it is determined that the ignition is not performed, and the blower 17 is operated.
And the flow rate pump 27 are stopped (S15), and then it is checked whether the ignition means 24 has operated once (S16). When the ignition means 24 has not operated once, the ignition means 24 has operated. It is checked whether or not it is twice (S17), and ignition means 2
If 4 has operated three times, it is determined that an ignition error has occurred, and the system is brought into a completely stopped state due to an abnormality (S1
8) The display unit (not shown) displays an ignition error. (S19)

In the re-ignition operation, the stepping motor 2
When the damper 18 outputs a specified number of drive pulses so that the damper 18 closes the air passage 16 to 0, the damper 18 reaches a predetermined position during the ignition operation before the output drive pulse reaches the specified number. However, when the remaining drive pulse is input to the stepping motor 20, the drive shaft 19 fixed to the lower end of the damper 18 slides, so that the stepping motor 20 is not damaged by it.

In the re-ignition operation when the first ignition operation is not ignited as described above, the blower 17 and the flow rate pump 27 are re-operated and then the ignition means 24 is operated, so that the damper 18 is operated in the first ignition operation. If it is not ignited even if it is in the predetermined position during the ignition operation, it will perform a quick re-ignition operation to ignite, so it is necessary to wait until hot water supply operation is started after hot water supply is required due to opening and closing the faucet, etc. The time can be shortened.

Further, when the re-ignition operation is not yet ignited, the re-ignition operation is first performed in the same manner as the first ignition operation.
The damper 18 outputs a specified number of drive pulses to the stepping motor 20 which drives 8 so that the blower path 16 is closed, and then the blower 17 and the flow rate pump 27 are restarted before the ignition means 24 is operated. Since the first ignition operation and the second ignition operation of the re-ignition operation are performed, the damper 1
If 8 is not ignited because it has not moved to the predetermined position where the air passage 16 is closed for some reason, the damper 18 is ignited by performing the ignition operation to re-operate. It is possible to prevent the occurrence of unfired errors, reduce the inspection and repair of specialists due to the occurrence of unfired errors,
It is easy to use.

Further, the damper 18, the blower 17, and the flow rate pump 2
If the ignition is not performed even after performing the re-ignition operation in which the ignition means 24 is operated after the operation of 7 and 7 is performed again, the control unit 42 determines that an ignition error has occurred and sets the all stop state due to the abnormality occurrence. By displaying an ignition error error on the display unit, the user is ignited in that state even though the ignition is not caused simply by the position error of the damper 18 but is caused by other causes. It is possible to prevent damage to the combustion device by repeating the operation or to operate it in an abnormal state. Also, at the time of inspection and repair by a specialist, the repairer should not simply have an unignition error due to a defective position of the damper 18. Therefore, it is possible to quickly identify the cause of the non-ignition error and shorten the inspection / repair time.

In the present embodiment, the example in which the combustion device is applied to the water heater is explained, but the invention is not limited to this, and the combustion device may be applied to a heater or an air conditioner.

[0041]

As described above, according to the combustion apparatus of the first aspect, the blower for supplying the combustion air, the flow rate pump for supplying the fuel oil to the fuel injection nozzle, and the fuel oil supplied from the fuel injection nozzle are vaporized. Vaporizer, which premixes the vaporized fuel oil and combustion air from the blower, an air blow passage for guiding the combustion air from the blower to the vaporizer, and a disconnection of the air blow passage in the air blow passage. A damper having a variable area, a combustor for burning the premixed gas premixed in the vaporizer, an ignition means for igniting the premixed gas in the combustor, and a premixed gas ignited in the combustor. And a firing device for activating the blower and the flow rate pump to generate a premixed gas and igniting the premixed gas by the ignition means. In the above ignition operation, When the part does not detect ignition, the blower and the flow pump are restarted to ignite by the ignition means, and the damper is used when the ignition detection part does not detect ignition in the re-ignition operation. After moving to the closed position, the blower and the flow rate pump are operated to perform the re-ignition operation in which the ignition means ignites.Therefore, the re-ignition operation when the first ignition operation is not ignited, the blower and the flow rate pump are used. If the damper is not ignited even if the damper is in the predetermined position at the time of the ignition operation in the first ignition operation, the quick re-ignition operation is performed to ignite the ignition. Therefore, the time from the start operation of driving to the start of driving can be shortened.

In the re-ignition operation when the ignition is not performed in the re-ignition operation, similarly to the first ignition operation, the stepping motor for driving the damper is first driven with a driving pulse so that the damper closes the air passage. After a specified number of is output, the blower and the flow rate pump are restarted, and then the ignition means is operated, whereby the first ignition operation and the second ignition operation, that is, the re-ignition operation, causes the damper to do something. If it is not ignited because it has not moved to the predetermined position where the air passage is closed due to the cause, the damper is re-activated to ignite, so it is possible to prevent the occurrence of an unignition error due to a defective damper position. It is possible to improve the usability by reducing the inspection / repair by a professional company due to the occurrence of an unfired error.

According to the combustion device of claim 2, claim 1
In the combustion device of, when the ignition detection unit does not detect ignition in the re-ignition operation, it is determined that an unignition error has occurred and is in a completely stopped state, and a control unit that outputs an error display signal, Since the display unit that displays an error according to the error display signal output by the control unit is provided, the user does not simply generate an unignition error due to a defective position of the damper but does not ignite due to another cause. It is possible to prevent the combustion device from being damaged by repeating the ignition operation in that state, or to operate it in an abnormal state.
At the time of repair, the repairer can know that the unignition error is not simply caused by the incorrect position of the damper, so the cause of the unignition error can be identified quickly and the inspection / repair time can be shortened. Is.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a water heater to which a combustion device according to an embodiment of the present invention is applied.

FIG. 2 is a configuration diagram of a water heater showing an ignition operation when the damper position of the combustion device is normal.

FIG. 3 is a configuration diagram of a water heater showing an ignition operation when the damper position of the combustion device is defective.

FIG. 4 is a sectional view of a main part of the combustion device.

FIG. 5 is a schematic view showing a damper of the combustion device.

FIG. 6 is a block diagram of the electric circuit.

FIG. 7 is a flowchart of the same ignition operation.

[Explanation of symbols]

1 vaporizer exhaust stack 3 Fuel injection nozzle 11 Combustion section 16 air duct 17 blower 18 damper 23 Ignition detector 24 Ignition means 27 flow pump

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Takahiro Kimura             7-7 Higashishinpo, Sanjo City, Niigata Prefecture             In Rona F-term (reference) 3K003 AA08 AB02 AC01 DA04                 3K005 GA07 GB04 JA04                 3K052 GA01 GA04 GB04 GE01 JA01                 3K068 NA01 PA01

Claims (2)

[Claims] 1. A blower for supplying combustion air, a flow pump for supplying fuel oil to a fuel injection nozzle, a fuel oil supplied from the fuel injection nozzle, and the vaporized fuel oil and combustion air from the blower. A pre-mixing vaporizer, an air duct for guiding the combustion air from the blower to the vaporizer, and a damper for varying the cross-sectional area of the air duct in the air duct.
A combustion part for burning the premixed gas premixed in the vaporizer, an ignition means for igniting the premixed gas in the combustion part, and an ignition detection part for detecting that the premixed gas is ignited in the combustion part. In the combustion device for igniting by moving the damper to the closed position, operating the blower and the flow rate pump to generate the premixed gas, and igniting the premixed gas by the ignition means, the ignition is performed by the ignition operation. When the detector does not detect ignition, the blower and the flow pump are restarted to ignite by the ignition means, and when the ignition detector does not detect ignition in the re-ignition operation, the damper is used. The combustion device is characterized in that the fan is moved to the closed position, and then the blower and the flow rate pump are operated to perform re-ignition operation in which ignition is performed by the ignition means. 2. When the ignition detecting unit does not detect ignition in the re-ignition operation, it is determined that an unignition error has occurred and the operation is stopped, and a control unit that outputs an error display signal is provided. 2. A display unit for displaying an error according to an error display signal output by the control unit.
Combustion device as described.