JPH11237043A - Combustion device with safety device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent explosive ignition by operating a tool cock, by manually opening a solenoid valve for ignition operation, and lighting a combustion lamp when the ignition is succeeded, and or lighting the combustion lamp after a previously prescribed time even when the ignition is not succeeded. SOLUTION: The thumb of the tool cock of a tool cock device 51 is manually pushed, the power of a built-in battery 63 is supplied to a source gas solenoid valve 68 by a control part 62 for opening, and a combustion gas is introduced from a combustion supply system. After the operation, the driving current of the battery 63 is boosted and is supplied to a frame rod 26 by the control part 62, and the flame of a pilot burner is detected. When ignition is confirmed, the driving current from the battery 63 is supplied to a combustion lamp 75, and the combustion lamp 75 is lighted. On the other hand, when the ignition is not confirmed, power from the battery 63 is supplied to the combustion lamp 75 for lighting it after a lapse of 10 seconds based on a first timer 76.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a combustion device for supplying fuel by opening and closing a solenoid valve, and to an improvement in a combustion device such as a balance type bath pot in which combustion is confirmed by lighting a combustion lamp. It is about.

[0002]

2. Description of the Related Art Conventionally, in a combustion device such as a balanced bath kettle, a fuel supply system is opened by an electromagnetic valve, a burner is ignited, a flame is detected using a thermocouple or a frame rod, and ignition is performed. After confirming, the combustion operation is continued. In addition, the combustion lamp is turned on during combustion so that a user can confirm that the fuel is burning, and such a combustion lamp is particularly used in a combustion device in which a viewing window or the like is not disposed near a burner. It is important as one of the safety devices because it can be used as a clue for confirming whether ignition has occurred or whether there is any extinguishment in the ignition operation.

[0003] On the other hand, since such a balanced bath kettle is installed in a bathroom, it is not preferable to connect a commercial power supply in order to avoid a risk of electric leakage or the like. For this reason, electrical components such as the above-mentioned solenoid valve required for combustion control, a flame rod for safe combustion, and a combustion lamp, which require a drive current, are supplied with the drive current by a built-in battery. Therefore, it is necessary to devise power saving so that the built-in battery is not wasted.

[0004]

In safe combustion, one of the most important points is prevention of explosion and ignition in a combustion device. In such an explosion ignition, prior to the combustion operation, after supplying fuel to the combustion device and performing an ignition operation, ignition is not performed properly, raw gas is generated, and this raw gas is accumulated in the appliance, This may catch fire. It is necessary to prevent any such explosion and ignition, and various measures have been studied, but they are still insufficient.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problem, and can prevent explosion and ignition caused by igniting gas accumulated in an appliance, and can save power during operation. The purpose of the present invention is to provide a combustion device that can be used.

[0006]

SUMMARY OF THE INVENTION According to the first aspect of the present invention, there is provided an appliance stopper which is manually operated, and an opening operation is performed in conjunction with the appliance stopper. An electromagnetic valve for opening and closing the fuel supply system, and ignition means for igniting the burner,
A thermocouple for supplying a drive current for maintaining the opening operation to the solenoid valve regardless of whether or not the appliance plug is operated during combustion, and a combustion lamp for confirming combustion of the burner. By operating the appliance plug, the solenoid valve is manually opened to perform an ignition operation, and when ignited, the combustion lamp is turned on. With a combustion device equipped with a safety device configured to turn on the lamp,
Achieved.

According to the first aspect of the present invention, in this combustion device, when the user pushes the appliance plug to supply fuel prior to the ignition operation of the appliance, the solenoid valve is opened in conjunction with the pushing. Thus, fuel is supplied to the burner. Next, an ignition operation is performed to perform, for example, spark discharge on the supplied fuel gas. As a result, when the fuel gas is ignited, the combustion lamp is turned on. As a result, the user sees the lighting of the combustion lamp and releases his / her hand from the instrument stopper.

Here, when the burner is properly ignited, the combustion is performed, so that the solenoid valve is opened based on the electromotive force of the thermocouple, and the operation is continued to supply the fuel.
For this reason, in order to maintain the opening operation of the solenoid valve, for example, it is not necessary to use a built-in battery or the like, so that power saving is achieved. On the other hand, if the burner is not ignited even if the ignition operation is performed, combustion will not be performed and the electromotive force from the thermocouple will not be obtained. When the fuel supply system is kept pressed by the operator, the solenoid valve associated therewith remains open, and the fuel supply system remains open. In this state, raw gas accumulates in the instrument. Here, even if ignition is not performed by the ignition operation, the combustion lamp is turned on after a predetermined time. Thus, when the user visually recognizes that the combustion lamp has been turned on, the user thinks that the ignition has occurred, and releases his hand from the appliance stopper knob. Then, in conjunction with this, the solenoid valve is also closed. For this reason, it is prevented that fuel gas accumulates in the appliance without igniting. Therefore, the "predetermined time" means that the fuel gas is not supplied and the fuel gas is continuously supplied.
The time during which fuel gas does not accumulate to the extent of explosive ignition in the appliance is determined by, for example, measuring in advance according to the appliance.

According to the second aspect of the present invention, there is provided an electromagnetic valve for opening and closing a fuel supply system to a burner, and a first flame detecting device disposed in a combustion flame for determining the opening and closing of the electromagnetic valve. A flame second means for detecting a flame current which is provided in the combustion flame and which is provided with a predetermined drive current and detects the flame current; and a combustion lamp which is turned on / off based on a detection result of the flame detection means. This is achieved by a combustion device provided with a safety device, wherein the first flame detection means and the second flame detection means are not interlocked.

According to the second aspect of the present invention, the first flame detecting means and the second flame detecting means are not interlocked, so that the solenoid valve of the fuel supply system is opened and closed and the combustion lamp is turned on and off. Can be operated separately.

According to the third aspect of the present invention, there is provided a solenoid valve for opening and closing a fuel supply system for supplying fuel to a burner, and a thermocouple for supplying a drive current to the solenoid valve during combustion. And a flame detection means arranged in the combustion flame and detecting a flame current, and a combustion lamp which is turned on and off based on a detection result of the flame detection means, wherein the flame detection means is provided for a predetermined time. This is achieved by a combustion device provided with a safety device, which is configured to be driven intermittently every time.

According to the third aspect of the present invention, while the combustion device is performing combustion, a drive current is supplied to the solenoid valve based on the electromotive force of the thermocouple, so that the solenoid valve continues to open. The fuel supply to the burner is continued. When the burning flame goes out, the electromotive force of the thermocouple is lost, and the solenoid valve is closed to stop supplying the fuel gas, so that no raw gas accumulates in the appliance. Further, the flame detecting means generally needs to apply a predetermined drive current when detecting the flame current based on the action in the combustion flame, and requires relatively large electric power. Therefore, in order to save power, by not operating this continuously, but operating it intermittently as in the above configuration, it is possible to realize power saving correspondingly, and at the same time, the flame detecting means and the combustion lamp Since the operation and the opening / closing timing of the solenoid valve are separated from each other, the intermittent operation of the flame detecting means does not adversely affect the safe operation.

Further, the invention according to claim 4 is characterized in that the flame detecting means is constituted by a frame rod, and the thermocouple and the flame detecting means are separately operated.

According to the fifth aspect of the present invention, there is provided an appliance plug which is manually operated, and an opening operation is performed in conjunction with the appliance stopper, and the opening operation is continued while the burner is burning. An electromagnetic valve for opening and closing the fuel supply system, an ignition means for igniting the burner, and an opening operation with respect to the electromagnetic valve during combustion regardless of whether or not the appliance plug is operated. Thermocouple for providing a drive current for performing the combustion, a flame detection means arranged in a combustion flame, receiving a predetermined drive current, and detecting a flame current, and combustion turned on / off based on a detection result of the flame detection means A lamp, and operating the appliance plug, manually opening the solenoid valve to perform an ignition operation, and when ignited, turns on the combustion lamp and sets a predetermined first when not ignited. Has passed the specified time This is achieved by a combustion device provided with a safety device, wherein the combustion lamp is turned on, and during the combustion, the flame detecting means is intermittently driven at a predetermined second predetermined time. Is done.

According to the configuration of claim 5, the above-mentioned claim 1 is provided.
And 2 can be exhibited, and power can be saved while avoiding explosion and ignition during ignition and combustion.

[0016]

Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. The embodiment described below is a preferred specific example of the present invention, and thus various technically preferable limitations are added. However, the scope of the present invention particularly limits the present invention in the following description. The embodiment is not limited to these embodiments unless otherwise stated.

FIG. 1 is a system diagram showing a main configuration of a balanced bathtub as a combined combustion device according to an embodiment of the present invention. In the figure, a combined combustion device (balanced bath cooker) 50 is a bath cooker with a combined water heater, which is provided with a burner 1 for additional heating of the bath and a burner 2 for hot water supply, each of which has a bath heat source. The heat exchanger 4 and the heat exchanger 4 for hot water supply are heated to have two functions of additional heating of the bath and hot water supply. Further, a control unit 62 and a built-in battery 63 are provided. The control unit 62 controls the operation of the combined combustion device 50 as described later, and supplies the electric power of the built-in battery 63 to a transmission product that needs the electric power. Therefore, as will be described later, in the combined combustion device 50 that is a balanced bath kettle, consumption of the built-in battery 63 is minimized.

The heat exchanger 3 for the bath is connected to a reheating line 5, which is connected to a bath 16 via a circulation fitting 15. Further, the bath burner 1 is provided with an empty heating prevention device 64.

On the other hand, to explain the hot water supply side, the water supply pipe 6 is connected to the diaphragm case 7b. A diaphragm 7a is housed in the diaphragm case 7b. After the water supplied by the water supply pipe 6 enters the diaphragm case 7b, it branches into two pipe lines 6b and 6c to reach a junction 6d. Pipe 6b is a pipe passing through heat exchanger 4 for hot water supply,
The conduit 6c extends to a junction 6d through an orifice (not shown) arranged on the conduit. The pipe 6 c passing through the orifice is a bypass pipe of the heat exchanger 4. The pressure of the water flowing out from the high pressure side 7d of the diaphragm case 7b drops due to the pressure loss while passing through the two pipelines 6b and 6c. Therefore, the pressure (dynamic pressure) at the junction 6d is lower than the high pressure side 7d of the diaphragm case 7b. Therefore, the diaphragm 7a is moved by the pressure difference between the junction 6d and the water supply pressure.

Further, a hot water temperature knob 8 is connected to the water supply pipe 6, and a drain plug 7c is provided at a lower end of the diaphragm case 7b. In addition, the diaphragm case 7b
From the low pressure side, a pipe line 6a as a pressure detection pipe extends and is connected to the hot water supply pipe 31 so as to detect the pressure at the junction 6d. The diaphragm case 7b is divided into a high-pressure side 7d and a low-pressure side 7e by a diaphragm 7a. The high pressure side 7d and the low pressure side 7e have the same pressure when the tap is closed, but when the tap is opened, the low pressure side 7e.
In e, the pressure is reduced from the high pressure side 7d by the pressure loss in the heat exchanger 4 or the like. Thus, when the tap is opened and water flows through the water supply pipe 6, the diaphragm 7a moves to the right in FIG. 1 based on the pressure difference. In response to this movement, the valve body 71 of the hydraulic automatic gas valve 58 moves rightward against the biasing force of the built-in spring, and sends a fuel gas from a branch pipe 57 described later to a gas pipe 69, where the fuel gas is sent. It is flowing. In other words, the diaphragm 7a is moved by the above-mentioned differential pressure generated at the time of passing water, and the water pressure automatic gas valve is opened only when water is passed, and the fuel gas is sent to the pipe 69.

Further, a pressure relief device 59 and a water flow switch 9 as a detecting means are connected to the hot water supply pipe 31, so that hot water can be supplied to the following three locations. That is, the first tapping pipe 12 and the shower pipe 13 and the second tapping pipe 14 are connected via the tapping switch lever 11 downstream of the water flow switch 9, and the hot water supply pipe 31 and the second tapping pipe 14 are connected to each other. A bypass pipe 14a is provided therebetween through a water solenoid valve 10. In addition, a hot water supply heating prevention device 65 and a container body heating prevention device 61 are provided in the appliance in relation to the hot water supply side, and are connected to the above-mentioned empty heating prevention device 64 on the bath side. The water flow switch 9 may use other detection means such as a flow sensor.

On the other hand, a fuel supply system for supplying fuel to each of the bath and hot water burners is connected to a gas pipe extending from a gas supply source (not shown), and a source gas solenoid valve 68 for opening and closing the gas supply system. It has. The downstream side of the original gas solenoid valve 68 is branched into three: a hot water supply gas pipe 34, a bath gas pipe 35, and a first pilot gas pipe 36.

The hot water supply gas pipe 34 is connected to the hot water supply gas governor 1.
It is connected to a hot water supply side burner 2 composed of two sets of burners via an electromagnetic valve 9 and a first electromagnetic valve 23 which is an opening / closing valve for hot water supply gas. The hot water supply side burner 2 includes a first burner 2-1 and a second burner 2-2. The second burner 2-2 is provided with a second solenoid valve 24 for switching the capacity. I have.
Therefore, by opening and closing the capacity switching valve 24,
Combustion of only the first burner 2-1 and operation with high capacity by both the first and second burners can be performed. The second solenoid valve 24 is linked to the hot water knob 8 described above.

The bath gas pipe 35 is connected to the bath gas governor 2.
The bath gas solenoid valve 29 is connected to the bath gas solenoid valve 29 via the valve 0, and further connected to the bath gas burner 1. The first pilot gas pipe 36 is branched into one branch pipe 56 and the other branch pipe 57 at a branch point 67 in the instrument.

The other branch pipe 57 is connected to the upstream side of the automatic hydraulic gas valve 58. This hydraulic automatic gas valve 5
8 is a high pressure side 7 of the diaphragm case 7b on the downstream side.
e is connected. And the hydraulic automatic gas valve 58 is
The valve body 71 is urged toward the low-pressure side 7d in the valve body case.
When pushed to the right due to the above-mentioned differential pressure caused by the flow of water, the fuel gas which opens and is introduced from the upstream side of the hydraulic automatic gas valve 58 is connected to the downstream side and extends to the pilot burner 21. The gas is sent out to the service gas pipe 69. Thereby, as described later, when the hot water supply operation is performed, the fuel gas is supplied to the pilot burner 21 by the functions of the diaphragm case 7b and the automatic hydraulic gas valve 58.

The one branch pipe 56 is related to a bath combustion operation. That is, this one branch pipe 56 is connected to the instrument plug device 51. When the instrument plug device 51 is operated as described later and the valve element 55 of the gas valve is opened, fuel gas is sent from the gas outlet to the pipeline 91. Line 91 is the second
Is connected to the pilot burner gas pipe 69, whereby the fuel gas is sent to the pilot burner 21. The pilot burner 21 is disposed adjacent to the above-described bath and hot water supply burners, and the flame of the pilot burner transfers the fire to the bath and hot water supply burners when the respective burners are ignited. Is available.

Therefore, prior to each combustion of the combined water heater, in order to cause the pilot burner to perform an ignition operation, an ignition electrode 27 as an ignition means and an ignition device for supplying a high voltage to the ignition electrode 27 (Igniter) 28
And a flame rod 26 and / or a thermocouple 25 for detecting a combustion flame are provided on the pilot burner 21. In FIG. 1, the frame rod 26 and the thermocouple 25 are shown as one for the sake of illustration.

Next, the appliance plug device 51 and the safe combustion device of the combined combustion device 50 will be described. Instrument stopper device 5
Reference numeral 1 denotes an ignition means for bath combustion and a part of a combustion safety device. As shown in FIG. 4, the instrument plug device 51 includes an instrument plug knob 53 exposed from the upper end of the case 51a and an instrument plug 52 connected to the instrument plug knob 53. Case 51 at the lower end
and a valve element 55 made of a metal that is attracted by magnetic force in a. A spring 5 as an urging means for urging the instrument plug 52 upward is provided in the case 51a.
3a and a spring 53b as an urging means for urging the valve body 55 upward are housed. The above case 51a
Has a gas outlet 71 and a gas inlet 72, and the valve body 55 opens and closes a boundary between the gas outlet 71 and the gas inlet 72. An electromagnet 39 is fixed to the lower end of the case 51a, and the electromagnet 39 is connected to the thermocouple 25. On the other hand, a microswitch 78 as a detecting means for detecting the movement of the instrument plug 52 is arranged, and this microswitch 78 is connected to the control unit 62 as described later with reference to FIG.
Then, as described later, the operation of the microswitch 78 causes the control unit 62 to give an instruction to the original gas solenoid valve 68.

Thus, as will be described later, when the user pushes the instrument plug knob 53 and lowers the valve element 55, as shown in FIG. 3B, the metal valve element 55 is placed in the case 51a. To descend against the tension of the spring 53b,
Since the boundary is opened, the fuel gas introduced from the gas inlet 72 rises over the boundary and is supplied from the gas outlet 71 to the pilot burner 21 as described above. Therefore, the pilot gas burns by the ignition of the fuel gas by the ignition device 28 and the electrode 27. While the pilot burner 21 is burning, the electromotive force of the thermocouple 25 is applied to the electromagnet 39, so that the electromagnet 39 forms a predetermined magnetic field. Since the force by which this magnetic field attracts the valve body 55 is set stronger than that of the spring 53b, the metal valve body 55 is attracted by this magnetic field, so that the boundary is kept open. become. Therefore, even if the user removes his hand from the device stopper 53, the valve body 55 is held at the open position.

On the other hand, when the combustion of the pilot burner 21 is stopped or when the electromotive force of the thermocouple 25 is extinguished by the safety device as described later, as shown in FIG.
The magnetic field of the electromagnet 39 disappears, and the valve body 55 is pushed upward by the force of the spring 53b to close the boundary, so that the supply of the fuel gas is stopped.

FIG. 2 is a block diagram showing an example of the electrical configuration of the safe combustion device 40 of the combined combustion device 50 with the control unit 62 at the center. The safety device 40 includes a control unit 62. The control unit 62 may be configured by a predetermined relay circuit or the like in order to perform control contents described later, or may be configured by incorporating a CPU and a nonvolatile memory storing the control contents. . The following mainly describes an example in which the control program is operated by the CPU.

The control unit 62 has a built-in battery 6 as a power supply.
3. Original gas solenoid valve 68, thermocouple 2 as flame detection means
5 and / or a flame rod 26, a combustion lamp 75, and first and second timers 76 and 77 as first and second time measuring means to be described later, and detection for detecting that water flows into the hot water supply pipe. For example, a water flow switch 9 as a means, a microswitch 78 as a detecting means interlocked with the operation of the instrument plug of the instrument plug device 51, and an ignition device 28 as an ignition means are connected. The battery 63 supplies a predetermined electric power to the control unit 62, and the solenoid valve 6 according to a command from the control unit 62.
8 is supplied with a drive current. If necessary, a boosting unit such as a capacitor or a transformer may be provided in the control unit 62 to supply a drive current to the ignition electrode and other electric components. Further, the control unit 62 boosts the current supplied from the battery 63 to the control unit 62,
A drive current for detection is given to the frame rod 16.

Further, the control section 62 instructs the solenoid valve 68 to open and close the solenoid valve 68 at a timing described later. In this case, the drive current for the solenoid valve 68 is provided from the thermocouple 25 via the control unit 62 during combustion, whereby the solenoid valve 68 maintains the opening operation.

The driving current for lighting the combustion lamp 75 is supplied from the battery 63 via the control unit 62. At this time, the control unit 62 controls on / off of the combustion lamp 75 based on the detection result at the time of operation of the frame rod 26. The first timer 76 and the second timer 77 may be built in the control unit 62. As will be described later, the first timer 76 is a timer for measuring the timing of turning on the combustion lamp 75 even when ignition cannot be confirmed after the ignition operation. The second timer 77 is a timer for setting a timing for operating the frame rod 26 and the like as a flame detecting means.

The combustion apparatus 10 is configured as described above, and can be operated, for example, as follows. Here, FIGS. 8 and 9 show an example of the operation of the combustion device 10 in detail, and the main points of this operation will be described with reference to FIGS. 5 to 7. FIG. Note that the corresponding portions of the steps described in FIGS. 5 to 7 are denoted by the same reference numerals in FIGS. FIG. 5 is a flowchart illustrating an example of a reheating operation as an operation example at the time of ignition. In the figure, the user
When the instrument wire knob 53 of the instrument plug device 51 of the combustion device 50 is manually pushed (ST11), the instrument plug 52 is lowered by pushing the instrument plug knob 53, and the microswitch 78, which is the detection means in FIG. 3, is turned on. , An ON signal is input to the control unit 62. This allows the following to be performed simultaneously.
The control unit 62 starts counting time by the first timer 76 (t1 = 0). Then, a driving current is applied to an igniter (igniter) 28 that supplies a high voltage to the ignition electrode 27 to perform spark discharge. Further, the control unit 62 supplies the power of the built-in battery 63 to the original gas solenoid valve 68 and opens it,
Fuel gas is introduced from the fuel supply system. In addition, since the valve plug 55 of FIG. 3 is opened by pushing the device stopper knob 53, fuel gas is supplied to the pilot burner 21 via the gas pipe 69.

Following this operation, the control section 62 operates the frame rod 26. That is, the control unit 62 operates the frame rod 26 at this timing without constantly setting the frame rod 26 in the monitor state. At this time, the control unit 62 boosts the drive current of the battery 63 and supplies the boosted drive current to the frame rod 26, detects the flame of the spark, and confirms the ignition (ST12). here,
When the ignition is confirmed, the process proceeds to ST15, and the control unit 62
The driving current from the battery 63 is applied to the combustion lamp 75 to turn on the combustion lamp 75. Thus, when the user releases his / her hand from the state in which the appliance plug knob 53 of the appliance plug device 51 is pushed in (ST16), the combustion is continued as described later. That is, as described above, the electromagnet 39 of the appliance plug device 51 is ignited by the ignited combustion flame.
Is applied, the valve element 55 of the device plug device 51 is attracted to the magnetic field of the electromagnet 39 and the gas outlet 7
1 is kept open.

On the other hand, if the ignition of the ignition is not confirmed in step 12, the process proceeds to step ST13, and whether or not the measurement time of the first timer 76, which has started the measurement in step ST11, has passed a predetermined time, for example, 10 seconds. Check if. The predetermined time measured by the first timer 76 is measured in advance by measuring the time during which the raw gas accumulates in the appliance when the ignition is not performed in the ignition operation, and the gas accumulates to a certain extent when there is a risk of explosion and ignition if ignited. Based on this, a safe range is determined and set for each appliance.

In ST13, the ignition operation by the igniter 27 is repeated in ST14 until the predetermined time has elapsed, and if it is determined in ST13 that the predetermined time has elapsed, the operation proceeds to ST17.

In ST17, the control unit 62 supplies the electric power from the battery 63 to the combustion lamp 75 to turn on the combustion lamp 75. Thereby, when the user visually recognizes the lighting of the combustion lamp 75, it is determined that the ignition has been completed by the ignition operation. Therefore, in ST18, the instrument plug of the instrument plug device 51 is manually returned to the original position (hand is released). Thereby, the micro switch 78 is turned off, and the control unit 62 closes the original gas solenoid valve 68 (ST19). Further, in the operation of ST18, in the appliance plug device 51, the valve body 55 in FIG. 4 is pushed up and closed by the urging force of the spring 53b, so that the supply of the fuel gas from the gas pipe 69 to the pilot burner 21 stops. . This prevents gas from accumulating in the instrument.

That is, in this embodiment, if ignition is not confirmed even after a predetermined time has elapsed after the ignition operation,
If the spark discharge continues while sending the fuel gas, the gas accumulates in the apparatus, and if the accumulated gas is ignited in such a situation, there is a risk of explosion and ignition. For this reason, in order to avoid this, the combustion lamp 75 is turned on even though it is not burning. When the user confirms that the combustion lamp 75 is turned on, he thinks that the fire has occurred, so he releases his hand from the device stopper knob as usual. Therefore, the valve body 55 closes the gas outlet 71 as described above, and the fuel gas is supplied. It can be stopped and safety can be measured.

Therefore, after the closing of the device plug device 51,
If the control unit 62 turns off the lighting of the combustion lamp 75 (ST2)
0), the user sees it and starts the lighting operation again from the beginning, or sees that there is some failure in the appliance, and can take measures.

Also, in ST17, even if the user releases the instrument stopper knob of the instrument stopper device 51, the pilot burner 21 is already burning, unlike in the case of ST20. For this reason, since an electromotive force is generated in the thermocouple 25, the electromotive force of the thermocouple 25 is
Also sent to 9. Therefore, the valve element 55 keeps the gas outlet 71 open due to the magnetic field of the electromagnet 39. Thereby, the supply of the fuel gas from the gas pipe 69 to the pilot burner 21 is continued, and the combustion is continued. And
The combustion flame of the pilot burner 21 is supplied with fuel gas to the bath burner 1 by the opening operation of the bath gas solenoid valve 29 performed after the ignition is confirmed, and the fire is transferred to the bath burner 1, so that the combustion flame is added. Fired combustion can be reliably performed.

As described above, since the operation of the gas supply system to the pilot burner is performed by the power supply from the thermocouple 25 except for the original gas solenoid valve 68, the battery 63 is not consumed and the power consumption is reduced accordingly. It is possible to measure. That is, since the balanced bath kettle as in the present embodiment is installed in the bathroom, a commercial power supply cannot be connected in order to prevent a danger of electric leakage or the like. Therefore, there is an advantage that the built-in battery 63 can be saved.

Then, the process proceeds to ST21, where the control section 62 starts counting time by the second timer 77 (ST21). Then, the control unit 62 boosts the electric power from the battery 63 and sends it to the flame detecting means such as the frame rod 26 for 0.2 seconds, for example, and monitors the combustion flame (ST22). This 0.2 second is the time required for flame detection and is set as appropriate. In other words, since the power required to monitor the flame is relatively large, to minimize the consumption of the battery 63,
The shortest time is selected and energized.

Thus, in ST23, it is determined whether or not the combustion is stopped. If the combustion is in progress, the combustion is confirmed, and the process proceeds to ST24 to end the flame detection. For example, it is determined whether or not 30 seconds have elapsed as the predetermined time. After 30 seconds, the process returns to ST21, where the control unit 62 resets the second timer 77, returns to ST23, and performs flame detection again. In this way, by intermittently operating the frame rod 26 as the flame detecting means, the detection of a flame that consumes relatively large power is minimized, and power is saved. Also in this point, it is a remarkable advantage in a balanced bath kettle requiring power saving.

If it is determined in step ST23 that combustion has stopped, no electromotive force is generated in the thermocouple 25 as described above. The valve element 55 of 51 automatically closes. Therefore, as described above, the supply of the fuel gas from the gas pipe 69 is stopped, and the explosion and ignition can be prevented.

Then, the control section 62 proceeds to ST25,
The source gas solenoid valve 68 is closed, and the lighting of the combustion lamp is turned off so that the user can confirm that the combustion of the combustion device 10 has stopped (ST26).

Next, an example of the hot water supply operation of the combustion device 10 will be described with reference to FIG. When the user opens the hot water tap, water is supplied from the water supply pipe 6 as described above. Thus, the diaphragm 7a moves to the right in FIG. 1 based on the above-described pressure difference. In response to this movement, the valve body 71 of the hydraulic automatic gas valve 58 moves rightward against the biasing force of the built-in spring, and transfers the fuel gas from the branch pipe 57 to the gas pipe 69.
And the fuel gas flows into the pilot burner 21 (ST31).

The water flow switch 9 as a detecting means is turned on by the above water flow.
Activates the ignition device 28 and at the same time
Is opened by the power of the built-in battery 63 (ST32). Thus, the pilot burner 21 is ignited. Next, the control unit 62 opens the hot water supply gas solenoid valves 23 and 24 and sends the fuel gas to the hot water supply burners 2-1 and 2-2. Thereby, the hot water supply burner 2-
The fire starts at 1 and 2, and the combustion is started. Then
The control unit 62 turns off the ignition device 28 (ST33),
As in the case of reheating, the control unit 62 controls the second timer 77.
(ST34). And the control unit 6
2 is for flame detection means such as the frame rod 26,
The power from the battery 63 is boosted and sent, for example, for 0.2 seconds to monitor the combustion flame (ST35).

Thus, in ST36, it is determined whether or not the combustion has stopped. If the combustion is in progress, the combustion has been confirmed, and the process proceeds to ST37 to terminate the flame detection. For example, it is determined whether or not 30 seconds have elapsed as the predetermined time. After 30 seconds have elapsed, the process returns to ST34, where the control section 62 resets the second timer 77, returns to ST35, and performs flame detection again. In this manner, by intermittently operating the frame rod 26 as the flame detecting means, the detection of the flame that consumes relatively large electric power is minimized, and the turning on and off of the combustion lamp is determined by additional heating. As in the case of the above, the operation is performed while saving power. On the contrary,
If it is determined in ST36 that combustion has stopped, the process proceeds to ST38, where it is confirmed that the water flow switch 9 has been turned off.
Is closed (ST39), and the hot water supply combustion is completed. The user closes the hot water tap in this state (ST40). Also, during the hot water supply combustion, when the pilot burner is extinguished, the valve body 55 is activated by the thermocouple 25 as in the case of the additional heating.
Is immediately closed, ensuring safety.

As described above, according to the above-described embodiment, the explosion ignition caused by the repetition of the ignition operation for a long time can be avoided, and the flame detecting means for turning on / off the combustion lamp can be provided. The intermittent operation makes it possible to save power in the built-in battery 63 and to save power even in a balanced bath kettle that particularly requires power consumption. Further, since the driving of the valve element 55 of the instrument plug device 51 is performed without using the built-in battery 63, power saving is also achieved in this regard.

In the above-described embodiment, the main solenoid valve is driven by a battery, and is switched to driving by a thermocouple in the middle of the operation to interlock with the valve 55. However, the main electromagnetic valve is mechanically interlocked with the valve 55 from the beginning. Is also good. Further, in the above embodiment, the water heater was described, but the present invention can be applied to any type of combustion device as long as it burns fuel gas, such as a bath kettle using gas or kerosene as fuel gas, The present invention can be widely applied to a heating device and the like, and an outdoor installation type of these devices.

[0053]

As described above, according to the present invention, it is possible to prevent explosion and ignition caused by igniting gas accumulated in an appliance, and to save power during operation. A combustion device comprising the device can be provided.

[Brief description of the drawings]

FIG. 1 is a system diagram showing a configuration of a combustion device according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a combustion safety device of the combustion device of FIG. 1;

FIG. 3 is an explanatory view showing an operation example of the appliance plug device of the combined combustion device of FIG. 1;

FIG. 4 is an explanatory diagram showing a configuration of a safety device of the combined combustion device of FIG. 1;

FIG. 5 is a diagram showing a main part of an example of a safe operation at the time of ignition of the combustion device of FIG. 1;

FIG. 6 is a diagram showing a main part of an example of a safety operation of the combustion device of FIG. 1 during additional combustion.

FIG. 7 is a diagram showing a main part of an example of a safety operation of the combustion device of FIG. 1 during hot water supply combustion.

FIG. 8 is a diagram showing in detail an example of a safe operation of the combustion device of FIG. 1 during additional combustion.

FIG. 9 is a diagram showing in detail an example of a safe operation of the combustion device of FIG. 1 during hot water supply combustion.

[Explanation of symbols]

 Reference Signs List 1 bath burner 2 hot water supply burner 3 bath heat exchanger 4 hot water supply heat exchanger 5 circulation line 6 water supply pipe 7 water governor 9 water flow switch 17 fuel supply system (pipe) 21 pilot burner 25 thermocouple 27 ignition electrode 28 Ignition device 31 Hot water supply pipe 33 Additional heating water flow switch 34 Hot water supply gas pipe 35 Bath gas pipe 36 First pilot gas pipe 51 Instrument plug device 53 Instrument plug knob 56 One branch pipe 57 The other branch pipe 58 Water pressure automatic gas Valve 61 Body overheating prevention device 62 Control unit 63 Built-in battery 64 Dry heating overheating prevention device 65 Hot water supply overheating prevention device 68 Original gas solenoid valve 75 Combustion lamp 76 First timer 77 Second timer

Claims (5)

[Claims] An electromagnetic valve for opening and closing a fuel supply system, wherein a manually operated appliance stopper and an opening operation are performed in conjunction with the appliance stopper, and the opening operation is continued during combustion of a burner. An ignition means for igniting the burner; a thermocouple for applying a drive current for maintaining the opening operation to the solenoid valve during combustion regardless of whether or not an appliance plug is operated; A combustion lamp for confirming the combustion of the fuel cell, and operating the appliance plug to manually open the solenoid valve to perform an ignition operation, and when ignited, turns on the combustion lamp and does not ignite. A combustion device equipped with a safety device, characterized in that the combustion lamp is turned on after a predetermined time has elapsed in the case. 2. An electromagnetic valve for opening and closing a fuel supply system to a burner, and a first valve disposed in a combustion flame for determining opening and closing of the electromagnetic valve.
Flame detection means, disposed in the combustion flame, given a predetermined drive current,
A second flame detecting means for detecting a flame current; and a combustion lamp which is turned on / off based on a detection result of the flame detecting means. The first flame detecting means and the second flame detecting means A combustion device provided with a safety device, wherein the combustion device is configured to be non-interlocked. 3. A solenoid valve for opening and closing a fuel supply system for supplying fuel to the burner, a thermocouple for supplying a drive current to the solenoid valve during combustion, and a predetermined drive current arranged in a combustion flame. Given
Flame detecting means for detecting a flame current, and a combustion lamp which is turned on and off based on the detection result of the flame detecting means, wherein the flame detecting means is driven intermittently every predetermined time. Combustion device with safety device 4. The flame detection means is constituted by a frame rod, and the thermocouple and the flame detection means are made to function separately.
The combustion device according to claim 1. 5. An electromagnetic valve for opening and closing a fuel supply system, wherein a manually operated appliance plug and an opening operation are performed in conjunction with the appliance plug, and the opening operation is continued while the burner is burning. An ignition means for igniting the burner; a thermocouple for applying a drive current for maintaining the opening operation to the solenoid valve during combustion regardless of whether or not an appliance plug is operated; and a combustion flame Placed inside and given a predetermined drive current,
Flame detection means for detecting the flame current, comprising a combustion lamp that is turned on and off based on the detection result of the flame detection means, operating the appliance plug, manually opening the solenoid valve to perform an ignition operation, In the case of ignition, the combustion lamp is turned on, and also in the case of non-ignition, the combustion lamp is turned on when a predetermined first predetermined time has elapsed. A combustion device equipped with a safety device, wherein the combustion device is intermittently driven every second predetermined time.