JPH10169974A - Combustor in hot water heater and its operation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To start in a short time control of a whole apparatus with cooperation of a thermal power generation device and a battery. SOLUTION: A battery performs power supply in an ordinary range to a proportional valve 42 upon initial starting of a combustor 10 where a power supply is from the battery E and a thermal power generation device 30, maintenance of an open state of pilot burner solenoid valve 43A, and ignition to the pilot burner 13 with an igniter 15. When electromotive force of the thermal power generation device has reached a level by ignition of the pilot burner where there are possible power supply to the proportional valve and maintenance of conditions of the pilot burner solenoid valve, a power supply for controlling the combustor is switched over from the battery to the thermal power generation device, and provided a water current switch is turned on, power is supplied to the proportional valve exceeding the ordinary range, and provided he electromotive force of the thermal power generation device has reached a level where a combustion fan 14 can be stared, the combustion fan is started, and a main burner solenoid valve 43B is opened to ignite the main burner 12 and the power supply to the proportional valve is returned to the ordinary range to start formed combustion with the combustion fan.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device in a water heater and a method for operating the same.

[0002]

2. Description of the Related Art Conventionally, as a combustion apparatus of this kind and a method of operating the same, for example, there is a combustion apparatus as disclosed in Japanese Patent Publication No. 3-18089.

That is, at the beginning of the ignition of the main burner, the thermoelectric generator as a power source for controlling the solenoid valve has a small electromotive force, so that a forced hold burner is used to generate the required electromotive force. Is to be heated.

[0004]

However, in such a conventional method of operating a combustion apparatus, an electromotive force of a thermoelectric generator capable of controlling the entire apparatus including equipment such as a combustion fan is obtained. Was difficult.

[0005] In addition, there is a problem that a thermoelectric generator must generate a sufficiently large electromotive force in order to stably supply a certain level of electromotive force because the transient characteristics are not good. SUMMARY OF THE INVENTION The present invention has been made in view of such a conventional problem, and a water heater capable of promptly starting control of the entire apparatus using only a thermoelectric element by cooperating a thermoelectric element and a battery. It is an object of the present invention to provide a method of operating a combustion device in the above.

[0006]

Means for achieving the object are as follows.

[1] In a combustion device (10) having a battery (E) and a thermoelectric generator (30) as a power supply in a water heater, a manual gas cock (40) provided in a gas passage (40) of the combustion device (10). 41), and a main burner gas passage (40A) branched downstream of the manual gas cock (41) and connected to the pilot burner (13) and the main burner (12).
B), and the pilot burner gas flow path is (4)
0A) a pilot burner proportional valve (42A) capable of supplying power between the manual gas cock (41) and the pilot burner (13) using the battery (E) and the thermoelectric generator (30) as power supplies; Solenoid valve for pilot burner (4
3A), and the main burner gas flow path is (40
B) Between the manual gas cock (41) and the main burner (12), a main burner proportional valve (42B) and a main burner solenoid valve (43B) capable of supplying power using the thermoelectric generator (30) as a power source. ), And each of the proportional valves (4
2A, 42B) the thermoelectric generator (30) can generate electric power for performing forced combustion by driving a combustion fan (14) of the combustion device (10). Combustion device in (10).

[2] In a combustion device (10) having a battery (E) and a thermoelectric generator (30) as a power supply in a water heater, a manual gas cock (41) is provided in a gas passage (40) of the combustion device (10). And the gas flow path (40) is upstream of the manual gas cock (41) provided with a proportional valve (42) capable of supplying power using the battery (E) and the thermoelectric generator (30) as power sources. Section and the pilot burner gas flow path (40
A) and a downstream portion of the manual gas cock (41) branched into a main burner gas flow path (40B). The pilot burner gas flow path (40A) is provided with the battery (E) and the thermoelectric generator (30). ), Into a branch gas flow path (401) provided with a pilot burner solenoid valve (43A) capable of supplying power and a branch gas flow path (402) provided with an orifice (44). The main burner gas flow path (40B) is connected to the pilot burner (13) again downstream and connected to the pilot burner (13), and the main burner gas flow path (40B) is used for a main burner capable of supplying power using the battery (E) and the thermoelectric generator (30) as power sources. Branch gas flow path (403) provided with first solenoid valve (43B)
And a second electromagnetic valve for a main burner (43) capable of supplying power using the battery (E) and the thermoelectric generator (30) as power sources.
C) branched into two of the branch gas flow paths (404) provided with
Rejoins downstream and is connected to the main burner (12),
The proportional valve (42) and each of the solenoid valves (43A, 43
B, 43C), whereby the thermoelectric generator (30) can generate electric power for performing forced combustion by driving a combustion fan (14) of the combustion device (10). Combustion device in (10).

[3] In the operation method of the combustion device (10) having the battery (E) and the thermoelectric generator (30) as a power supply in the water heater, natural combustion and forced combustion on the proportional valve (42) at the time of initial operation are performed. Power supply in a normal range that can be performed, maintaining the solenoid valve for pilot burner (43A) open,
Pilot burner (13) by igniter (15)
And the ignition operation of the thermoelectric generator (3) by the ignition of the pilot burner (13).
When the electromotive force of (0) reaches a level at which the power can be supplied to the proportional valve (42) and the state of the solenoid valve for pilot burner (43A) can be maintained, a power supply for controlling the combustion device (10) From the battery (E) to the thermoelectric generator (3
0), and when the running water switch is turned on, power is supplied to the proportional valve (42) beyond the normal range, and the electromotive force of the thermoelectric generator (30) reaches a level at which the combustion fan (14) can be started. When reached, start the combustion fan (14),
The main burner solenoid valve (43B) is opened to ignite the main burner (12), the power supply to the proportional valve (42) is returned to the normal range, and forced combustion by the combustion fan (14) is started. A method for operating a combustion device (10) in a water heater.

[4] In a method of operating a combustion device (10) having a battery (E) and a thermoelectric generator (30) as a power source in a water heater, natural combustion to a pilot burner proportional valve (42A) during initial operation and The battery (E) is used to supply power in a normal range enabling forced combustion, maintain the solenoid valve for pilot burner (43A) open, and ignite the pilot burner (13) with the igniter (15).
When the pilot burner (13) is ignited, the electromotive force of the thermoelectric generator (30) supplies power to the pilot burner proportional valve (42A) and maintains the state of the pilot burner solenoid valve (43A). , Power supply to the main burner proportional valve (42B) and the main burner solenoid valve (4
When reaching the level at which the state of 3B) can be maintained, the power source for controlling the combustion device (10) is switched from the battery (E) to the thermoelectric generator (30). The main burner solenoid valve (43B) is opened to ignite the main burner (12), power is supplied to the pilot burner proportional valve (42A) beyond the normal range, and the main burner proportional valve (42B) is supplied to the main burner proportional valve (42B). Supplies power at a low level capable of spontaneous combustion within the normal range, controls the water regulating valve (52), and causes the electromotive force of the thermoelectric generator to reach a level at which the combustion fan (14) can be started. if you do,
The combustion fan (14) is started, and the pilot burner proportional valve (42A) and the main burner proportional valve (4) are started.
2B) The method of operating the combustion device (10) in the water heater, wherein the power supply to the water heater is returned to the power supply amount in the normal range, and forced combustion by the combustion fan (14) is started.

[5] In the operation method of the combustion device (10) having the battery (E) and the thermoelectric generator (30) as a power supply in the water heater, the natural combustion and the forced combustion to the proportional valve (42) at the time of initial operation are performed. A flow path (401) provided with a power supply in a normal range that can be used and a pilot burner solenoid valve (43A).
Channel (402) having orifices (44) juxtaposed to
The operation of igniting the gas supplied to the pilot burner (13) through the igniter (15) is performed by the battery (E), and the electromotive force of the thermoelectric generator (30) is reduced by the ignition of the pilot burner (13). Power supply to the proportional valve (42) and the pilot burner solenoid valve (4
3A) and the gas flow path (40B) to the main burner (12)
The two main burner solenoid valves (43
B, 43C) when the state can be maintained.
The power supply for controlling the combustion device (10) is switched from the battery (E) to the thermoelectric generator (30), and when the flowing water switch is turned on, the pilot burner solenoid valve (4) is turned on.
3A) and the two main burner solenoid valves (43B,
43C), the main burner (12) is ignited, and the control of the water regulating valve (52) is started. Then, the combustion fan (14) is started, the other one of the two main burner solenoid valves (43B, 43C) is opened, and forced combustion by the combustion fan (14) is started. Operating method of the combustion device (10) in the vessel.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Various embodiments of the present invention will be described below with reference to the drawings.

FIGS. 1 to 4 show a first embodiment of the present invention.

As shown in FIG. 1, a water heater combustion device 10 is provided.
Are a main burner 12, a pilot burner 13, a combustion fan 14, an igniter 15 for igniting the pilot burner 13, a control unit 60 for controlling the combustion device 10, a battery E as a power source for controlling the combustion device 10, and a thermoelectric generator 30. Etc. are provided.

The combustion gas to the combustion device 10 is supplied to a gas passage 40.
Supplied by In the gas flow path 40, a proportional valve 42 and a manual gas cock 41 are provided in this order from the upstream. The proportional valve 42 and the manual gas cock 41 are electrically connected to the control unit 60. The control unit 60 controls the proportional valve 42 to perform normal control data (for example, a current of 10 to 50 mA) for controlling the normal range in which the combustion device 10 can perform from spontaneous combustion to forced combustion, or to kick up the thermoelectric generator 30. Control data (for example, 10
0 mA current. ).

A gas passage 40 is provided downstream of the manual gas cock 41 for supplying gas to the pilot burner 13.
And a main burner gas flow path 40B for supplying the air to the main burner.

A pilot burner solenoid valve 43A is provided in the middle of the pilot burner gas passage 40A, and the pilot burner 13 is connected to an end thereof. The pilot burner 13 is provided with an igniter 15 for ignition and a frame rod 17 for detecting ignition.

The main burner gas passage 40B is provided with a main burner solenoid valve 43B in the middle thereof, and the main burner 12 is connected to an end thereof. A combustion fan 14 for supplying air is provided below the main burner 12.

The pilot burner solenoid valve 43A, the igniter 15, the frame rod 17, the main burner solenoid valve 43B and the combustion fan 14 are all electrically connected to the control unit 60. Further, the combustion fan 14 is electrically connected to a thermoelectric generator 30 described below, and receives supply of drive power from the thermoelectric generator 30.

A thermoelectric generator 30 as a power source is mounted outside the combustion chamber 11 and is sandwiched between a heating section 31 provided inside the combustion chamber 11 and a cooling section 32 outside the combustion chamber 11. Have been.

The cooling unit 32 is a cooling device using water. The water is supplied by a water supply passage 50, and the water that has exited the cooling unit 32 flows into the heat exchanger 16 in the combustion device 10.

In the water supply passage 50, a water amount sensor (water flow switch) 51 and a water regulating valve 52 are provided in this order upstream of the cooling unit 32. The water supply channel 50 that has exited the cooling unit 32 is
0 and communicates with the heat exchanger 16. The cooling unit 32, the water amount sensor 51, and the water regulating valve 52 are all provided by the control unit 6.
0 is electrically connected.

The hot water heated by the combustion device 10 is supplied to the hot water supply path 7.
Then, the air is supplied to the hot water supply unit 80 through the combustion apparatus 10 through the air outlet 0. A thermometer 71 such as a thermistor thermometer is provided between the combustion device 10 and the hot water supply unit 80 to measure the temperature of the hot water.
Is provided. The thermometer 71 is electrically connected to the control unit 60.

Although not shown, the control unit 60 has a control circuit, a voltage comparison circuit, a switching circuit, and the like, and controls the combustion device 10 based on data from the above components.

Next, the operation will be described.

Referring to the flowchart of FIG. 2, when the manual gas cock 41 is turned on (101), the pilot burner 13 is turned on by the electric power from the battery E (1).
02), the pilot burner solenoid valve 43A opens, and the igniter 15 ignites the pilot burner 13 (103). At this time, the proportional valve 42 is controlled by the normal control data. The igniter 15 is, for example, 4
Perform ignition operation for 2 seconds.

The ignition of the pilot burner 13 is detected by the frame rod 17 (104). If the ignition cannot be detected, the operations of steps 103 and 104 are performed a predetermined number of times (for example, four times) (105). If ignition is not detected even after performing the predetermined number of times, the igniter 15 is turned off and the pilot burner solenoid valve 43A is closed (1).
06).

The frame rod 17 is the pilot burner 1
When the ignition of No. 3 is detected (104), the igniter 1
The ignition operation of No. 5 is stopped (107). At this time, the thermal power of the pilot burner 13 is 400, as shown in FIG.
kcal.

When the electromotive force of the thermoelectric generator 30 is controlled by the normal control data of the proportional valve 42 and the pilot burner solenoid valve 43
When the size of A can be maintained (108),
The power source for controlling the proportional valve 42 and the pilot burner solenoid valve 43A is switched from the battery E to the thermoelectric generator 30 (109).

When the running water switch is turned on (11
0), the proportional valve 42 is switched to the control based on the kick-up control data, and the control of the water regulating valve 52 is started (111). At this time, the thermal power of the pilot burner 13 jumps up to 1,000 kcal as shown in FIG.

The electromotive force of the thermoelectric generator 30 is
Is reached, the combustion fan 14 is started (112), the main burner solenoid valve 43B is opened to ignite the main burner 12, and the proportional valve 42 is returned to the control based on the normal control data (113). .

When the electromotive force of the thermoelectric generator 30 reaches a value close to the maximum (114), the combustion fan 14, the proportional valve 42 and the water regulating valve 52 are controlled to start forced combustion (115).

As described above, by cooperating the thermoelectric generator and the battery and making the capacity of the pilot burner variable, it is possible to quickly start the control of the entire apparatus only with the thermoelectric generator.

In the above description, two control data are used to control the proportional valve 42. However, by using three or more control data, more precise control is performed on the transient characteristics of the thermoelectric generator 30. be able to.

FIGS. 4 to 6 show a second embodiment of the present invention.

The same parts as those in the first embodiment are denoted by the same reference numerals, and duplicate description will be omitted.

As shown in FIG. 4, the combustion apparatus according to this embodiment is different from the combustion apparatus shown in the above embodiment in that a proportional valve 42 provided in a gas flow passage 40 is provided upstream of a manual gas cock 41. It is not provided, and is provided in each of a pilot burner gas flow path 40A and a main burner gas flow path 40B that are branched into two at a downstream portion.

The pilot burner gas flow path 40A is provided with a proportional valve 42A and a pilot burner solenoid valve 43A in the downstream order.
3 is connected.

Similarly, a proportional valve 42B and a solenoid valve 43B for the main burner are provided in the main burner gas flow path 40B in order toward the downstream, and the end is connected to the main burner 12.

In order to control each of the proportional valves 42A and 42B, the control unit 60 includes, for example, kick-up control data for controlling the power supply with 100 mA, for example, 10 to 50 mA.
, Normal control data for performing control enabling forced combustion with power supply in the normal range, and low-range normal control data for controlling spontaneous combustion with power supply at a low level of, for example, 10 to 30 mA in the normal range.

Next, the operation will be described.

Referring to the flowchart of FIG. 5, when the manual gas cock 41 is turned on (201), the pilot burner 13 is turned on by the electric power from the battery E (2).
02), the pilot burner solenoid valve 43A opens, and the igniter 15 ignites the pilot burner 13 (203). At this time, the proportional valve 42A and the proportional valve 42B
Is controlled by the normal control data described above. The igniter 15 performs an ignition operation for, for example, 4 seconds.

The ignition of the pilot burner 13 is detected by the frame rod 17 (204). If the ignition cannot be detected, the operations of steps 203 and 204 are performed a predetermined number of times (for example, four times) (205). If ignition is not detected even after performing the predetermined number of times, the igniter 15 is turned off and the pilot burner solenoid valve 43A is closed (2).
06).

The frame rod 17 is the pilot burner 1
When the ignition of No. 3 is detected (204), the igniter 1
The ignition operation of No. 5 is stopped (207). At this time, the thermal power of the pilot burner 13 is 400, as shown in FIG.
kcal.

The electromotive force of the thermoelectric generator 30 is controlled by the normal control data of the pilot burner proportional valve 42A and the main burner proportional valve 42B, and the pilot burner solenoid valve 4 is controlled.
When the size of the solenoid valve 3A and the state of the main burner solenoid valve 43B can be maintained (208), the proportional valves 42A, 42B
Then, the power supply for controlling the solenoid valves 43A and 43B is switched from the battery E to the thermoelectric generator 30 (209).

When the running water switch is turned on (21
0), the main burner solenoid valve 43B is opened and the main burner 12 is ignited, and the pilot burner proportional valve 42A is switched to the control based on the kick-up control data. The main burner proportional valve 42B is controlled based on the low-range normal control data. The control is switched to, and at the same time, the control of the water regulating valve 52 is started to maintain the tapping temperature (211). At this time, the thermal power of the pilot burner 13 and the main burner 12 jumps up to 1,000 kcal as shown in FIG.

The electromotive force of the thermoelectric generator 30 is
Is reached, the combustion fan 14 is started (212), and the control of the pilot burner proportional valve 42A and the main burner proportional valve 42B is switched to normal control data (213).

When the electromotive force of the thermoelectric generator 30 reaches a value close to the maximum (214), the combustion fan 14, the pilot burner proportional valve 42A, the main burner proportional valve 42B and the water regulating valve 52 are controlled to forcibly burn. Is started (215).

As described above, by cooperating the thermoelectric generator and the battery and making the capacity of the pilot burner variable, control of the entire apparatus can be promptly started by the thermoelectric generator alone.

In step 211, control of the water control valve 52 is started to maintain the tapping temperature. However, at the end of the combustion operation, the water control valve 52 is set to the throttled position. At the start of the next operation, the tapping temperature may be maintained only by controlling the main burner proportional valve 42B.

FIGS. 7 and 8 show a third embodiment of the present invention.

The same parts as those of the above-mentioned two embodiments are denoted by the same reference numerals, and duplicate description will be omitted.

Referring to FIG. 7, the proportional valve 42 provided in the gas passage 40 of the combustion device 10 is provided upstream of the manual gas cock 41 as in the first embodiment. Also,
The downstream portion of the manual gas cock 41 has a branched pilot burner gas passage 40A and a main burner gas passage 40B.

The pilot burner gas flow path 40A has two more
It branches into two branch gas passages 401 and 402. The branch gas flow path 401 is provided with a pilot burner solenoid valve 43A. On the other hand, the branch gas flow path 402 is provided with the orifice 44. Two branch gas channels 40
1 and 402 are connected to the pilot burner 13 after joining again downstream.

Similarly, the main burner gas passage 40B is also branched into two branch gas passages 403 and 404. The branch gas flow path 403 is provided with a first main burner solenoid valve 43B. On the other hand, the branch gas flow path 404 is provided with a second main burner solenoid valve 43C. These branch gas flow paths 403 and 404 join again downstream and are connected to the main burner 12.

Next, the operation will be described.

Referring to the flowchart of FIG. 8, when the manual gas cock 41 is turned on (301), the pilot burner 13 is turned on by the electric power from the battery E (3).
02). At this time, the pilot burner solenoid valve 43A
Is closed, and the combustion gas supplied to the pilot burner 13 is supplied through the branch gas passage 402 of the pilot burner gas passage 40A provided with the orifice 44.

The ignition of the pilot burner 13 is performed by the igniter 15 (303). The ignition operation is performed by operating the igniter 15 for, for example, 4 seconds.

The ignition of the pilot burner 13 is detected by the frame rod 17 (304). If the ignition cannot be detected, the operations of steps 303 and 304 are performed a predetermined number of times (for example, four times) (305). If ignition is not detected even after performing the predetermined number of times, the igniter 15 is turned off (306).

The frame rod 17 is the pilot burner 1
When the ignition of No. 3 is detected (304), the igniter 1
The ignition operation of No. 5 is stopped (307). At this time, the thermal power of pilot burner 13 is 400 kcal.

When the pilot burner 13 is ignited, the electromotive force of the thermoelectric generator 30 causes the control of the proportional valve 42 and the two main burners disposed in parallel to the pilot burner solenoid valve 43A and the gas flow path 40B to the main burner 12. When the state of the solenoid valves 43B and 43C reaches a level at which the state can be maintained (308), the power supply for controlling the combustion device 10 is changed to the battery E.
Is switched to the thermoelectric generator 30 (309).

Next, when the running water switch is turned on (310),
One of the pilot burner solenoid valve 43A and the two main burner solenoid valves 43B and 43C is opened to ignite the main burner 12 and start controlling the water regulating valve 52 (311).

At this time, the heating power of the pilot burner 13 is set to 1,000 kcal, and the heating power of the main burner 12 is set to 1 kcal.
It is assumed to be 0000 kcal.

The electromotive force of the thermoelectric generator 30 is
Is reached, the combustion fan 14 is started (312) and the two main burner solenoid valves 43B, 4B are operated.
The closed one of the 3Cs is opened (313).

When the electromotive force of the thermoelectric generator 30 reaches a value close to the maximum (314), the combustion fan 14, the proportional valve 42 and the water regulating valve 52 are controlled to start forced combustion by the combustion fan 14 (315). .

As described above, by cooperating the thermoelectric generator and the battery and making the capacity of the pilot burner variable, it is possible to promptly start the control of the entire apparatus only with the thermoelectric generator.

The proportional valve 42 may be replaced with a gas pressure regulating valve (governor).

In the above-described embodiment, the control data of the proportional valve is switched after the electromotive force of the thermoelectric generator reaches a level at which the control of the combustion fan is possible. However, when driving becomes possible, stepless control may be performed using control data of a proportional valve that does not cause non-combustion in that state.

Further, even if the combustion fan is spontaneously burned while being driven, the capacity is such that non-combustion does not occur (for example, 10,000).
kcal), and the combustion fan may be used supplementarily.

[0070]

According to the operating method of the combustion apparatus according to the present invention, the capability of the pilot burner is made variable by cooperating the thermoelectric generator and the battery, so that the entire combustion apparatus using only the thermoelectric generator can be quickly operated. You can go into control.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a combustion device according to a first embodiment of the present invention.

FIG. 2 is a flowchart illustrating a method of operating the combustion device according to the first embodiment of the present invention.

FIG. 3 is an explanatory diagram showing control data used for controlling a proportional valve during operation of the combustion device according to the first embodiment of the present invention and output of the combustion device.

FIG. 4 is a schematic view showing a combustion device according to a second embodiment of the present invention.

FIG. 5 is a flowchart illustrating an operation method of the combustion device according to the second embodiment of the present invention.

FIG. 6 is an explanatory diagram showing control data used for controlling a proportional valve during operation of a combustion device according to a second embodiment of the present invention and outputs of the combustion device.

FIG. 7 is a schematic diagram showing a combustion device according to a third embodiment of the present invention.

FIG. 8 is a flowchart illustrating a method of operating a combustion device according to a third embodiment of the present invention.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Combustion apparatus 12 ... Main burner 13 ... Pilot burner 14 ... Combustion fan 15 ... Igniter 30 ... Thermoelectric generator 40 ... Gas flow path 40A ... Pilot burner gas flow path 40B ... Main burner gas flow path 41 ... Manual gas cock 42 ... Proportion Valve 42A: Proportional valve for pilot burner 42B ... Proportional valve for main burner 43A ... Solenoid valve for pilot burner 43B ... Solenoid valve for main burner (first solenoid valve for main burner) 43C ... Second solenoid valve for main burner 44 ... Orifice 52: water regulating valve E: battery 401 ... branch gas flow path 402 ... branch gas flow path 403 ... branch gas flow path 404 ... branch gas flow path

Claims (5)

[Claims] 1. A combustion device having a battery and a thermoelectric generator in a water heater in a power supply, wherein a manual gas cock provided in a gas flow path of the combustion device is branched downstream of the manual gas cock and connected to a pilot burner. A pilot burner gas flow path and a main burner gas flow path connected to the main burner, wherein the pilot burner gas flow path powers the battery and the thermoelectric generator between the manual gas cock and the pilot burner. The main burner gas flow path is capable of supplying power between the manual gas cock and the main burner using the thermoelectric generator as a power source. A main burner proportional valve and a main burner solenoid valve, and the thermoelectric element is controlled by the respective proportional valves. Combustion apparatus in water heater, wherein the possible generation of power for the forced combustion by driving the combustion fan baked device. 2. A combustion apparatus having a battery and a thermoelectric generator in a water heater as a power supply, comprising a manual gas cock in a gas flow path of the combustion apparatus, wherein the gas flow path supplies power to the battery and the thermoelectric generator. An upstream part of the manual gas cock provided with a proportional valve capable of supplying power, and a downstream part of the manual gas cock branched into a pilot burner gas flow path and a main burner gas flow path, wherein the pilot burner gas flow path Is branched into two, a branch gas flow path provided with a pilot burner solenoid valve capable of supplying power using the battery and the thermoelectric generator as a power supply, and a branch gas flow path provided with an orifice, and rejoins downstream. The main burner gas flow path is a branch gas flow path provided with a main burner first solenoid valve capable of supplying power using the battery and the thermoelectric generator as power sources. Branching into two of the branch gas flow paths provided with a second electromagnetic valve for a main burner capable of supplying power using the battery and the thermoelectric generator as a power source, joined again downstream and connected to the main burner, The combustion device in the water heater, wherein the thermoelectric generator can generate electric power for performing forced combustion by driving a combustion fan of the combustion device by controlling the proportional valve and the solenoid valves. 3. A method of operating a combustion apparatus having a battery and a thermoelectric generator in a water heater as a power supply, wherein power supply in a normal range enabling spontaneous combustion and forced combustion to a proportional valve at the time of initial operation, and electromagnetic control for a pilot burner. The battery keeps the valve open and performs an ignition operation on the pilot burner by the igniter, and the ignition of the pilot burner causes the electromotive force of the thermoelectric generator to feed the proportional valve to the power supply and the pilot burner. When the state of the solenoid valve can be maintained, the power source for controlling the combustion device is switched from the battery to the thermoelectric generator when the flow of water is switched on, and the proportional valve is out of the normal range. When the electromotive force of the thermoelectric generator reaches a level at which the combustion fan can be started, the combustion fan is started, and the solenoid valve for the main burner is opened. Operating the main burner, returning power to the proportional valve to the normal range, and starting forced combustion by the combustion fan. 4. A method for operating a combustion device having a battery and a thermoelectric generator in a water heater in a power supply, comprising: a power supply in a normal range enabling spontaneous combustion and forced combustion to a pilot burner proportional valve at an initial operation; The battery keeps the burner solenoid valve open and ignites the pilot burner with the battery, and the ignition of the pilot burner causes the electromotive force of the thermoelectric generator to supply power to the pilot burner proportional valve. When the state of the pilot burner solenoid valve is maintained, and the power supply to the main burner proportional valve and the state of the main burner solenoid valve are maintained, the power supply for controlling the combustion device is turned off. Switch from the battery to the thermoelectric generator, and when the water switch is turned on, open the solenoid valve for the main burner and ignite the main burner. The pilot burner proportional valve is supplied with power beyond the normal range, the main burner proportional valve is supplied with a low level power capable of spontaneous combustion within the normal range, and controls the water regulating valve. When the electromotive force of the thermoelectric generator reaches a level at which the combustion fan can be started, the combustion fan is started, and power is supplied to the pilot burner proportional valve and the main burner proportional valve in the normal range. And a method of operating the combustion device in the water heater, wherein forced combustion by the combustion fan is started. 5. A method for operating a combustion apparatus having a battery and a thermoelectric generator in a water heater as a power source, comprising: a power supply in a normal range enabling spontaneous combustion and forced combustion to a proportional valve at an initial operation; The battery performs an operation of igniting a gas supplied to the pilot burner by an igniter through a flow path having an orifice juxtaposed to a flow path provided with a valve, and the electromotive force of the thermoelectric generator is caused by the ignition of the pilot burner. When the power supply to the proportional valve and the maintenance of the state of the two main burner solenoid valves arranged in parallel in the pilot burner solenoid valve and the gas flow path to the main burner reach a level at which the combustion apparatus reaches a level capable of maintaining the state, The power supply for the control is switched from the battery to the thermoelectric generator, and when the flowing water switch is turned on, the solenoid valve for the pilot burner and the 2 One of the main burner solenoid valves is opened to ignite the main burner and start controlling the water regulating valve, and when the electromotive force of the thermoelectric generator reaches a startable level of the combustion fan, the combustion fan is started. And operating the other of the two main burner solenoid valves to start forced combustion by the combustion fan.