JPH07113521A - Operation stopping device in combustion instrument - Google Patents

Abstract

PURPOSE:To improve the safety property of a combustion instrument by a method wherein the operation of the combustion instrument is stopped when the measured voltage of a power supply is judged that it is lower than a set value in a voltage monitoring circuit by the reduction of a power supply voltage due to the energization of a dummy load. CONSTITUTION:A combustion instrument (water heater, for example) D is provided with a dummy load resistor 70 in the electric circuit thereof while the value of dummy load resistor is small such as the degree of 3OMEGA, for example, and, therefore, big amount of current flows instantaneously into the dummy resistor 70 when an ignition switch 71 is put ON and a power supply voltage is reduced largely. Accordingly, a voltage monitoring circuit 72 is operated simultaneously with the putting ON of the ignition switch 71 and when the terminal voltage of a power supply battery 73 is lower than a set value predetermined in the voltage monitoring circuit 72, the operation of the combustion instrument D is stopped immediately. According to this method, unnecessary supply of gas or water can be excluded and the safety property of the combustion instrument D can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a burning appliance using a battery as a power source for operating the burning appliance, and more specifically, when a terminal voltage of the power supply voltage is below a predetermined voltage by using a voltage monitoring circuit. The present invention relates to a deactivation device for a combustion instrument that stops the operation of the combustion instrument.

[0002]

2. Description of the Related Art Conventionally, in a burning appliance that uses a dry battery as a power source for operating the burning appliance, a water solenoid valve is used for controlling the water amount and a solenoid solenoid valve for the gas is used for controlling the water amount. There has been proposed a combustion instrument that is controlled in accordance with the above, and a combustion instrument that controls the water amount adjustment, the gas amount adjustment, and the like in a subordinate manner by shifting the timing by a single power unit, for example, a cam or the like joined to the rotating shaft of a motor.

Here, in a combustion appliance having a structure in which the amount of water and the amount of gas can be independently controlled by means of solenoid valves and the like, a plurality of solenoid valves and the like are operated based on command signals from a control circuit. Although the control is performed and the control programs are related, each solenoid valve or the like has no mechanical relationship. Therefore, a high degree of control is possible, and even with the same combustion appliance, it is possible to deal with a large number of controls by changing the control program.

On the other hand, in such a burning instrument, the current consumption increases when a plurality of solenoid valves etc. are intensively operated, and in the burning instrument which uses a dry battery as a power source for operating the burning instrument, In addition to increasing the load on the dry battery, it shortens the battery life and complicates the control mechanism.

On the other hand, in a combustion instrument for controlling the amount of water, the amount of gas, etc. by one power unit such as a motor, due to the control mechanism, the adjustment of the amount of water, the amount of gas cannot be avoided because it cannot avoid high-level control. Changing the content is not so easy. On the other hand, a combustion appliance that uses a battery as an operating power source does not require so high control, but rather has a strong demand for downsizing, and controls such as water volume adjustment and gas volume adjustment are driven by a single power unit. With such a combustion appliance, it is possible to greatly simplify the control mechanism and realize downsizing and cost reduction of the appliance, and to eliminate unnecessary operation of the power unit to operate the combustion appliance with as little power consumption as possible. There is also an aspect that it can be done.

[0006] In a combustion appliance in which control of such water amount adjustment and gas amount adjustment is driven by one power unit, a start signal is transmitted to the control circuit when the power switch is turned on, and the drive signal is transmitted from the control circuit to the motor. Then, the motor starts rotating. Various cams such as water stop valve drive cams and safety valve drive cams are joined to the rotary shaft of the motor, and these cams transmit the drive force of the motor to the water stop valve, safety valve, etc. either directly or via a shaft. However, valves such as water shutoff valve and safety valve are opened.

Here, since the water stop valve driving cam, the safety valve driving cam and the like are joined so as to shift the valve opening timing, the water shutoff valve is first opened and then the safety valve and the like are opened. Go. The invention having such a configuration is disclosed, for example, by a gas instantaneous water heater in Japanese Patent Laid-Open No. 62-66055 and an ignition device for a water heater in Japanese Patent Laid-Open No. 4-198612.

In addition, in a burning appliance in which all the control power supplies depend on dry batteries, the terminal voltage drops drastically due to a slight load as the dry batteries run down, and a stable current is supplied to each power unit. It cannot be supplied, and stable operation of combustion equipment cannot be maintained. Therefore, a voltage monitoring circuit is provided in the control circuit, and an operation stopping device that stops the operation of the combustion appliance when the terminal voltage of the dry battery becomes equal to or lower than a predetermined voltage is provided. Less than,
The operating state of the conventional combustion instrument will be described with reference to the timing chart showing the operation sequence of various members in the conventional combustion instrument shown in FIG.

In the conventional burner, the resistance value of the pull-up resistor provided in the ignition switch circuit is 1 KΩ.
˜Several tens of KΩ, and the current value supplied to this resistance is about several mA. On the other hand, the motor, the water solenoid valve, and the gas solenoid valve have a resistance value of about 5 to 7 Ω, and a very large current flows therethrough, which is the maximum electric load in the combustion appliance. Therefore, as shown in FIG. 4, in the conventional burner, when the voltage is applied to the motor and various electromagnetic valves, the voltage monitoring circuit is activated to stop the burner.

First, when the ignition switch is turned on, the voltage drop of the power supply is slight, so the voltage monitoring circuit does not work. Then, the operation of the combustion appliance proceeds and the water solenoid valve for circulating water in the combustion appliance. A voltage is applied to. Since the solenoid valve for water has a large electric load, the drop in the power supply voltage becomes large, and the voltage monitoring circuit may operate here depending on the usage status of the power supply battery.

When the voltage monitoring circuit does not work to the extent that a voltage is applied to the solenoid valve for water, the igniter is turned on to start combustion in the gas burner, and the solenoid for gas is sparked while sparking to the gas burner. A voltage is applied to the adsorption coil of the valve. At this time, the voltage is applied to the adsorption coil of the solenoid valve for gas in addition to the voltage applied to the igniter, which is the most severe condition for the power supply battery, and the drop in the power supply voltage becomes the maximum. It is activated and the burner is stopped. In this operating state in which the operation stopping device operates, the gas solenoid valve has already been opened and the supply of gas to the gas flow path has started.

[0012]

However, when the motor is driven to open the water shutoff valve and the gas safety valve, or when the water solenoid valve and the gas solenoid valve are operated, the terminal voltage of the power supply battery is kept to a predetermined value. The combustion appliance provided with the deactivation device for detecting the following has the following problems.

That is, as shown in FIG. 4, normally, the terminal voltage of the power source battery drops slightly when the ignition switch is turned on, and the voltage drops again when the water solenoid valve is actuated. The voltage drops most when the adsorption coil of the gas solenoid valve is operated while being turned on. Therefore, it is when the gas solenoid valve is opened that the voltage of the battery for power supply is actually detected by the voltage monitoring circuit to be equal to or lower than the predetermined voltage. The supply was started and there was a safety problem.

Also, when the water shutoff valve and the safety valve of the combustion appliance are operated by one motor, etc., the peak of the voltage drop of the power supply voltage is confirmed when the safety valve is opened and the water shutoff valve is opened, and the gas supply, Alternatively, there is a problem in that the supply of water is started and there is a safety problem, and it is not preferable to stop the combustion device during operation.

The present invention has been made in order to solve the above-mentioned problems, and is for a power source without operating a gas amount adjusting device or a water amount controlling device in a combustion appliance, or by only operating the water amount controlling device. The purpose is to detect the voltage drop of the battery, eliminate unnecessary gas supply and water supply to improve the safety of combustion equipment, and to avoid malfunction of combustion equipment due to insufficient power supply voltage. To aim.

[0016]

In order to achieve this object, a deactivation device for a combustion appliance according to the present invention is a power supply battery for supplying electric power for operating a combustion appliance, and a voltage is applied by the power supply battery. In a combustion appliance including a water amount adjusting device and a gas amount adjusting device that operate by means of the above, and a voltage monitoring circuit that monitors the voltage of the power source battery, the water amount adjusting device or the gas amount adjusting device includes the power source battery. A pseudo load having the same load resistance as the load generated when a voltage is applied is installed in the electric circuit,
When the operation of the appliance is started by turning on the ignition switch, the pseudo load is first energized, and the operation of the appliance is started when it is determined that the measured voltage of the power supply is less than or equal to the set value in the voltage monitoring circuit due to the decrease in the power supply voltage due to energization. The operation stopping means for stopping is provided as a configuration.

The operation stopping device for a combustion appliance according to the second aspect of the present invention is a power source battery for supplying a power source for operating the combustion appliance, and a water amount adjusting device that operates when a voltage is applied by the power source battery. A gas amount adjusting device and a voltage monitoring circuit for monitoring the voltage of the power source battery are provided, and when the voltage is applied by the power source battery, the water amount adjusting device is activated first, and then the gas amount adjusting device is activated. In the combustion instrument to be used, the water amount adjusting device is set to have the largest load among the operating devices in the combustion instrument, and at the start of operation of the device by turning on an ignition switch, the water amount adjusting device is applied to the water amount adjusting device by applying a voltage from the power source battery. When the measured voltage of the power supply is determined to be less than or equal to the set value in the voltage monitoring circuit due to the decrease in the power supply voltage due to the energization, the operation of the appliance is stopped. Comprising a stop means as a constituent.

[0018]

According to the operation stopping device for a combustion appliance according to the present invention having the above-mentioned structure, when the power is turned on and the voltage is applied, the water amount adjusting device and the gas amount adjusting device are electrically connected before being energized. The pseudo resistance placed in the power supply is energized, and the voltage of the power supply voltage is measured by the voltage monitoring circuit.

If it is determined by the voltage monitoring circuit that the voltage measured at this time is equal to or lower than the preset value, the combustion appliance is stopped from operating thereafter, while the measured voltage exceeds the preset value. In this case, the water amount adjusting device and the gas amount adjusting device are subsequently energized to continue the operation of the combustion appliance. Therefore, when the operation is stopped due to the shortage of the power supply voltage, the gas amount adjusting device is not in operation yet, so that the safety is ensured.

According to the second aspect of the invention, when the ignition switch is turned on, a voltage is first applied to the water amount adjusting device which is the largest load among the operating devices of the combustion appliance, and the voltage drop caused at this time is caused. When the voltage monitoring circuit determines that the power supply voltage is equal to or lower than the preset value, the subsequent operation of the combustion appliance is stopped.

On the other hand, when the measured voltage exceeds the set value, the water amount adjusting device operates as it is, and then the gas amount adjusting device is energized to continue the operation of the combustion instrument. Therefore, when the operation is stopped due to the shortage of the power supply voltage, only the water amount adjusting device is activated and the gas amount adjusting device is not yet activated, so that safety is ensured.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a schematic configuration of a main stop type water heater provided with an operation stopping device to which the present invention is applied.

The water heater D is provided with a heat exchanger 10 having a plurality of fins 10a formed in the upper part of its main body, and water is supplied to the heat exchanger 10. Hot water outlet pipe 1 for taking out hot water from the water supply pipe 11 and the heat exchanger 10.
2 and are connected. The water supply pipe 11 is connected to a faucet 20 for adjusting the amount of supplied water, and the tap pipe 12 is connected to a tap tap (not shown) made of a flexible pipe for supplying hot water. .

A water supply passage 21 is formed inside the faucet 20. A diaphragm chamber 22 is provided in the water supply passage 21 and a valve port 23 leading to the diaphragm chamber 22 is opened and closed. Faucet diaphragm 2
4 are provided. The faucet diaphragm 24 is provided with a valve opening 24a at a central portion corresponding to the valve opening 23. The valve opening 24a is provided at the tip of a valve spindle 25 penetrating the stopper wall 20a of the faucet 20. The attached faucet pilot valve 26 is arranged in a state of being constantly pressed by a spring 27 so as to close its valve opening 24a.

Further, the faucet diaphragm 24 has a valve opening 2
4a, a water passage hole 24b is provided, and when this valve opening 24a is closed by the faucet pilot valve 26, the water in the water supply passage 21 passes through the water passage hole 24b due to the water pressure in the water supply passage 21. Enters the back side 24c of the faucet diaphragm 24, and the closed state of the faucet pilot valve 26, that is, the closed state of the valve opening 23 of the diaphragm chamber 22 is maintained.

Further, the diaphragm chamber 22 is divided into a primary pressure chamber 22a and a secondary pressure chamber 22b by a hydraulic diaphragm 27, and the amount of water flowing into the diaphragm chamber 22 from the valve port 23 on the primary pressure chamber 22a side. A water amount adjusting valve 28 for adjusting the water pressure is attached to the surface of the hydraulic diaphragm 27 via a spring 29 so that the flow rate of water flowing through the water supply passage 21 is adjusted.

In the lower part of the faucet 20 on the side of the primary pressure chamber 22a, the amount of water supplied to the water supply pipe 11 and the tap water pipe 12 are adjusted.
A water amount throttle shaft 30 for adjusting the mixing amount of water to the hot water flowing through is rotatably provided. A hot water temperature adjusting lever 31 is provided on the water amount throttle shaft 30, and a hot and cold water changeover switch 3 for detecting rotation of the water amount throttle shaft 30 rotated by operating the hot water temperature adjusting lever 31.
2 are provided close to each other.

On the other hand, the secondary pressure chamber 22 of the diaphragm chamber 22.
On the side b, a bypass pipe line 15 connected to the Venturi pipe portion 14 formed in the water supply pipe line 11 for detecting the water flow in the water supply pipe line 11 is connected, and the water flows into the water supply pipe line 11 through the bypass pipe line 15. When the secondary pressure chamber 22b is in a negative pressure state than the primary pressure chamber 22a, the water flow control valve 28 moves to the left as shown by the arrow in FIG. 1 to provide the gas passage 41 of the gas plug 40 as described later. The automatic water pressure gas valve 42 is opened and the water flow detection switch WS is turned on.

A gas burner 50 for heating the heat exchanger 10 is arranged below the heat exchanger 10, and a gas pipe 51 for supplying a combustion gas is connected to the gas burner 50. Originally, a gas plug 40 for adjusting the gas supply amount is connected. An ignition electrode 52 and a flame rod 53 for detecting flame are attached to the gas burner 50, and an igniter 53 for applying a high voltage for spark generation is connected to the ignition electrode 52. A common dry battery 73 (see FIG. 3) is used as a power source for operating the motor M, the igniter 53, the control circuit, and the like.

The gas plug 40 has a hydraulic pressure automatic gas valve 42 which opens and closes a valve port 43 in conjunction with the operation of the water amount control valve 28 in a gas flow passage 41 inside the gas plug 40, and a gas pressure in the gas flow passage 41. To open and close the gas governor 45 that adjusts the opening of the valve opening 44 and the magnet safety valve 46 and the gas flow path 41 that are provided in the valve opening 45 near the gas inlet of the gas plug 40 to prevent the outflow of raw gas at the time of misfire. It is composed of an instrument plug 47 provided at the valve port 43.

Here, the hydraulic automatic gas valve 42 includes a valve shaft 4
2a is a stopper wall 40a of the gas stopper 40 and a stopper wall 2 of the faucet 20
It is shaped so as to penetrate through 0b and be connected to the hydraulic diaphragm 27 in the diaphragm chamber 22.
A switch actuating piece 42b is formed in the middle of 2a, and a water flow detection switch WS is arranged adjacent to the switch actuating piece 42b.

Further, the gas governor 45 has a gas flow path 41.
A spring 45a for expanding and contracting in accordance with the gas pressure at the valve to adjust the opening degree of the valve opening 44 is joined, and the magnet safety valve 46 has an electromagnet built therein for opening and closing the valve opening 46a by an adsorption operation. ing. Also,
The instrument stopper 47 is the stopper wall 4 of the gas stopper 40 located in the center of the figure.
It is attached to the tip of a valve shaft 47a that passes through 0b, and a spring 47b whose one end is locked by a protrusion formed on the stopper wall is attached to the upper portion thereof.

Below the valve shaft 47a to which the instrument plug 47 is attached, a motor M using a dry battery as a power source for opening and closing the instrument plug 47, the magnet safety valve 46, and the faucet 20 is installed. Has been done. This motor M
A cam shaft is meshed with the shaft via a reduction gear, and the first to third cams 60, 61, 62 are fixed to the cam shaft.

Here, the first cam 60 is formed so as to push up the motor interlocking lever 63 disposed above the motor M, and the faucet opening / closing lever 64 is connected to the tip of the motor interlocking lever 63. And faucet open / close lever 64
Is connected to a valve spindle 25 that opens and closes the faucet 20. The second cam 61 is formed so as to advance and retract the valve shaft 47a that is joined to the lower surface of the instrument plug 47 and that penetrates the plug wall 40b. The third cam 62 is formed so as to advance and retract the valve shaft 46b of the magnet safety valve 46 disposed on the left side of the motor M.

A feather touch type operation button OB is provided on the operation panel provided on the surface of the instrument body, and an ignition switch 71 which is turned on and off by button operation is provided on the back side thereof.

Next, the operation of the water heater according to the present invention will be described. First, when the user presses the operation button OB to turn on the ignition switch 71, the operation stop control, which will be described in detail later with reference to FIG. 3, is started, and a current flows through the pseudo load resistor 70 provided in the electric circuit. The terminal voltage of the dry battery 73 is measured by the voltage monitoring circuit 72, and when the measured value is less than the predetermined value, the operation of the water heater D is stopped. On the other hand, when the measured value is equal to or larger than the predetermined value, the normal operation described below is started.

First, when the motor M is driven and the first cam 60 fixed to the shaft of the motor M is rotated to push up the motor interlocking lever 63 disposed above it, the tip of the motor interlocking lever 63 is pushed. Faucet opening and closing lever 6 joined to
4 work together. When this faucet opening / closing lever 64 cooperates,
The valve spindle 25 of the faucet pilot valve 26 moves back and forth, and the valve opening 24a closed by the faucet pilot valve 26 is opened to open the faucet 20. In addition, in the water stop state in which water is not flowing through the faucet 20, the valve opening 24a is held closed by the spring 27.

When the faucet 20 is opened, water begins to flow in the water supply passage 21 and is distributed to the water supply pipe 11 and the hot water supply pipe 12 through the communication water passage through the primary pressure chamber 22a of the diaphragm chamber 22 and the water supply pipe. The water flowing through 11 passes through the Venturi tube portion 14 and flows into the heat exchanger 10.
At this time, negative pressure is generated by the water passing through the Venturi pipe portion 14, the pressure of the secondary pressure chamber 22b in the diaphragm chamber 22 is reduced, and the hydraulic diaphragm 27 moves leftward in FIG. The automatic hydraulic gas valve 42 starts to move via the.

Subsequently, when the shaft of the motor M rotates 80 degrees by the rotation of the motor M, the first cam 60 switch arranged on the right side of the motor M is turned on, and the drive of the motor M is stopped by the detection of this ON. . Then, the valve shaft 4 of the hydraulic automatic gas valve 42 pressed by the hydraulic diaphragm 27.
2a moves in the valve opening direction as it is and the water flow detection switch W
Wait until S is turned on.

When a sufficient amount of water is obtained after a while and the water flow detection switch WS is turned on, the motor M starts to operate again, and the third cam 62 fixed to the shaft of the motor M advances and retreats the valve shaft 46a of the magnet safety valve 46. By moving, the valve is opened to the adsorption position of the electromagnet. Subsequently, when the motor M rotates and reaches a predetermined angle, the second cam switch 61a is turned on, and an adsorption current is passed through the electromagnet of the magnet safety valve 46 based on this on detection.

After that, when the motor M further rotates and reaches a predetermined rotation angle, the cam surface of the second cam 61 causes the instrument plug 4 to move.
7 starts to push the tip of the valve shaft 47a, and moves the valve shaft 47a forward and backward in accordance with the rotation of the motor M to open and close the instrument plug 47.

In this way, when the predetermined angle at which the instrument plug 47 is fully opened is reached, the first cam switch 60a is turned off, the motor M is stopped by this OFF detection, and the gas is burned by the gas burner 50 when the instrument plug 47 is opened. The fuel gas discharged from the fuel cell is ignited and combustion is started.

Here, the discharge operation of the igniter 53 is started after a timer is started from the previous water flow detection and a predetermined time, for example, 1.2 seconds, elapses, and when the first cam switch 60a is detected to be off. It stops after a predetermined time, for example, 2 seconds, but if no flame is detected during this time, the supply of the attraction holding current to the magnet safety valve 46 is stopped, and at the same time the motor M is activated and the cam shaft is returned to the stop position. Be done. At this time, the faucet opening / closing lever returns to the pre-operating state, the faucet pilot valve 26 is opened, and the instrument stopper 47 is also opened, so that the water supply passage 21 and the gas passage 41 are blocked and hot water supply is stopped.

When combustion is started in the gas burner 50 and the heat exchanger 10 is heated in this way, the heat exchanger 10 is heated.
The water in the inside is heated and becomes hot water and flows in the hot water outlet pipe 12, and an appropriate amount of water adjusted by the water amount throttle shaft 30 is mixed via the hot water temperature adjusting lever 31 and taken out from the hot water tap.

After that, when the user presses the operation button OB to end the hot water supply, the ignition switch 71 is turned on to stop the supply of the attracting and holding current to the magnet safety valve 46, and at the same time, the motor M is started to operate the cam shaft. It is returned to the stop position. At this time, the faucet opening / closing lever returns to the pre-operation state, the faucet pilot valve 26 is closed, and the instrument plug 47 is also closed, so that the water supply passage 21 and the gas passage 41 are shut off and the hot water supply is stopped.

Next, the means for detecting the power supply voltage in the operation stopping device will be described with reference to FIGS. Here, FIG. 2 is a timing chart showing an operation sequence of various members according to the rotation of the motor M, and FIG. 3 is an explanatory diagram showing a schematic configuration of an electric circuit of a water heater to which the present invention is applied.

As shown in FIG. 3, the water heater D according to the present embodiment has a pseudo load resistor 70 installed in the electric circuit. Since the pseudo load resistance value is as small as 3Ω, FIG. As shown, when the ignition switch 71 is turned on, a large amount of current instantaneously flows into the pseudo load resistor 70, and the power supply voltage drops significantly. Therefore, at the same time when the ignition switch 71 is turned on, the voltage monitoring circuit 72 operates and the power source battery 73
When the terminal voltage of is less than or equal to the preset value in the voltage monitoring circuit 72, the operation of the water heater D is immediately stopped.

On the other hand, when the dry battery 73 is little consumed, the terminal voltage exceeds the set value even if a current flows through the pseudo load resistor 70 when the ignition switch 71 is turned on. When the vehicle is driven, the ignition operation described above is started (see FIG. 2), and the normal hot water supply operation is performed.

Since the maximum load is applied to the power source battery 73 before the motor M of the water heater D is operated in this way,
The water flow to the water supply circuit due to the opening of the faucet accompanying the operation of the motor M and the supply of the gas to the gas flow path due to the opening of the gas plug are not started, and the water heater D Safety is secured.

Next, a second embodiment will be described with reference to the timing chart shown in FIG. 5 is shown in FIG.
It is shown in comparison with the timing chart of the conventional combustion device shown in FIG.

In the water heater according to this embodiment, the water valve and the gas valve are driven not by the motor but by the water electromagnetic valve and the gas electromagnetic valve, and the constitution is the first. In the embodiment, each valve is a solenoid valve and the motor is omitted except that the description is omitted.

The operation of the water heater according to this embodiment will be described. First, when the user presses the operation button to turn on the start switch, the battery check control is started, and a current flows through the pseudo load resistance provided in the electric circuit. The terminal voltage of the dry cell is
As shown in FIG. 5, as compared with the case shown in FIG. 4, when the terminal voltage measured by the voltage monitoring circuit is less than a predetermined value, the operation of the water heater is stopped. To be done. Conventionally, the water heater was not stopped until the gas solenoid valve adsorption coil shown in FIG. 4 was turned on. On the other hand, when the measured value is equal to or more than the predetermined value, the normal operation is directly performed.

First, the water solenoid valve is driven, the valve spindle of the faucet pilot valve joined to the valve shaft moves forward and backward, and the valve opening closed by the faucet pilot valve is opened to open the faucet. Can be opened. It should be noted that in a water-stopped state in which water is not flowing through the faucet, the valve port is kept closed by the spring.

When the faucet is opened, water begins to flow in the water supply passage and is distributed to the water supply pipe and the hot water supply pipe through the communication water passage via the primary pressure chamber of the diaphragm chamber, and the water flowing through the water supply pipe is It passes through the Venturi tube and flows into the heat exchanger. At this time, negative pressure is generated by the water passing through the Venturi pipe portion, the pressure of the secondary pressure chamber in the diaphragm chamber decreases, and the hydraulic diaphragm moves to the left in FIG. The gas valve starts moving, and the valve shaft of the water pressure interlocking gas valve, which is pressed by the water pressure diaphragm, moves in the valve opening direction and waits until the water flow detection switch is turned on.

After a while, a sufficient amount of water supply is obtained, and when the water flow detection switch is turned on, the valve of the magnet safety valve opens to the adsorption position of the electromagnet. Then, the igniter discharges to the gas burner and waits for the supply of fuel gas to the gas burner. While the discharge operation from the igniter is continued, the adsorption coil of the gas solenoid valve is turned on, the gas solenoid valve is fully opened, and the fuel gas is supplied to the gas burner.
The fuel gas flowing out from the gas burner is ignited to start combustion. When combustion is confirmed by the frame rod, the holding coil of the gas solenoid valve is turned on, and the gas solenoid valve maintains a predetermined opening.

Here, in the discharge operation of the igniter, a timer is started from the previous water flow detection and a predetermined time, for example, 1.2.
It starts after waiting a lapse of seconds, and stops after a predetermined time, for example, 2 seconds, from the detection of the OFF of the first cam 60 switch. However, if no flame is detected during this time, the attraction holding current to the magnet safety valve 46 Is stopped, and at the same time, the motor M is activated and the cam shaft is returned to the stop position. At this time, the faucet opening / closing lever returns to the pre-operating state, the faucet pilot valve 26 is opened, and the instrument stopper 47 is also opened, so that the water supply passage 21 and the gas passage 41 are blocked and hot water supply is stopped.

When combustion is started in the gas burner and the heat exchanger is heated in this way, the water in the heat exchanger is heated and becomes hot water which flows through the hot water outlet pipe and the amount of water is passed through the hot water temperature adjusting lever. An appropriate amount of water adjusted by the throttle shaft is mixed and taken out from the hot water tap.

After that, when the user presses the operation button to end the hot water supply, the start switch is turned on to stop the supply of the adsorption holding current to the magnet safety valve, and at the same time the holding coil of the gas solenoid valve is turned off to supply the water. When the gas circuit is cut off, the coil of the water solenoid valve is also turned off, the faucet pilot valve is closed, the water supply channel is cut off, and hot water is stopped.

Next, a third embodiment will be described with reference to the timing chart shown in FIG. In the water heater according to the present embodiment, each valve is driven by the solenoid valve as in the second embodiment, and the winding resistance of the water solenoid valve is set to 5Ω and the winding resistance of the gas solenoid valve is set to 7Ω. By doing so, the load of the solenoid valve for water is increased to drive the solenoid valve for water to induce a drop in the power supply voltage, and the voltage monitoring circuit measures the terminal voltage of the power supply battery.

The configuration and operation of the water heater according to this embodiment are the second
Since there are many points in common with the water heater according to the embodiment, only different points will be described. First, when the user presses the operation button to turn on the activation switch, the drop in the terminal voltage is very small, and subsequently the solenoid valve for water is energized.
When the solenoid valve for water is energized, the solenoid valve for water is opened.At this time, the resistance value of the solenoid valve for water is set small, and since a large amount of current flows, the power supply voltage is large. descend. Then, when the power supply voltage is exhausted, the measured voltage value drops significantly and falls below the set value in the voltage monitoring circuit. When the temperature falls below the set value in this way, the subsequent control is not advanced and the operation of the water heater is stopped.

On the other hand, when the measured voltage value is equal to or higher than the set value, the control of the water heater is continued and the gas solenoid valve and the like are opened. At this time, the resistance value of the solenoid valve for water is set to be the smallest among the operating parts in the water heater, and a large electric load is set, so that the voltage monitoring circuit will not operate thereafter due to the operation of other operating parts.

By operating in this way, the operation of the gas solenoid valve can be stopped in advance without installing a new pseudo load resistor in the electric circuit. Incidentally, water,
The present invention can be applied even if the opening and closing of gas is performed by a single motor drive as in the first embodiment. That is, the load for opening the faucet by the motor is set to be the largest in the entire sequence.

As described in detail above, the water heaters according to the first and second embodiments are installed in the electric circuit before the driving of the motor, the water faucet and the gas faucet by the solenoid valve is started. Measure the power supply voltage by applying a voltage to the pseudo load resistance with the smallest resistance value in the water heater, and stop the operation of the water heater if the measured value is less than the value set in the voltage monitoring circuit. Therefore, it is possible to stop the operation of the water heater without operating the water faucet or gas faucet at all, and to provide a safe water heater that does not leave combustion gas in the water heater. Is possible.

Further, in the water heater according to the third embodiment, the resistance value of the water solenoid valve is set to the smallest value among the operating devices in the water heater. Since it was decided to operate the solenoid valve to determine whether the battery for power supply can operate the water heater, it is possible to avoid stopping the operation while the water heater is operating, and It is possible to avoid the deactivation of the water heater after the valve has been opened and the combustion gas has been supplied into the appliance.

Although the present invention has been described based on some embodiments, the present invention is not limited to the above embodiments, and various modifications and improvements can be made without departing from the spirit of the present invention. Can be easily inferred. For example, the resistance values of the pseudo load resistance and the winding resistance may be the smallest values in the combustion device, and are not limited to the values in the embodiment.

[0066]

As is apparent from the above description, the operation stopping device in the combustion instrument according to the present invention has a load resistance in the electric circuit which is similar to that of the water amount adjusting device and the like, and when the voltage is applied, the load is first applied. Since it was decided to apply a voltage to the resistor, it senses the voltage drop of the power supply battery without operating the gas amount control device or water amount control device in the combustion equipment, and eliminates unnecessary gas supply and water supply. Therefore, the safety of the burning appliance can be improved. In addition, the resistance value of the water volume control device was set to be the smallest in the combustion equipment, and the voltage was first applied to the water volume control device, so the voltage drop of the power supply battery was detected without operating the gas volume control device. It is possible to secure the safety of combustion appliances by eliminating unnecessary gas supply.
Further, it is possible to avoid the malfunction of the combustion appliance due to the insufficient voltage.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing a schematic configuration of a water heater to which the present invention is applied.

FIG. 2 is a timing chart showing an operation sequence of various members accompanying motor rotation.

FIG. 3 is an explanatory diagram showing a schematic configuration of an electric circuit in a water heater to which the present invention is applied.

FIG. 4 is a timing chart showing an operation sequence of various members in a conventional combustion device.

FIG. 5 is a timing chart showing an operation sequence of various members in the water heater according to the second embodiment.

FIG. 6 is a timing chart showing an operation sequence of various members in the water heater according to the third embodiment.

[Explanation of symbols]

 D water heater M motor 10 heat exchanger 20 water faucet 40 gas faucet 70 pseudo load resistance 72 voltage monitoring circuit

Claims (2)

[Claims] 1. A power source battery for supplying electric power for operating a combustion appliance, a water amount adjusting device and a gas amount adjusting device which are activated when a voltage is applied by the power source battery, and a voltage of the power source battery is monitored. In the combustion appliance including a voltage monitoring circuit that operates, a pseudo load having a load resistance similar to a load generated when a voltage from the power source battery is applied to the water amount adjusting device or the gas amount adjusting device is an electric circuit. It is installed inside and when the operation of the equipment by turning on the ignition switch starts,
First, the pseudo load is energized, and when the measured voltage of the power supply is determined to be less than or equal to the set value in the voltage monitoring circuit due to the decrease in the power supply voltage due to the energization, an operation stopping means for stopping the operation of the device is provided. A deactivation device for a combustion appliance characterized. 2. A power source battery for supplying electric power for operating a combustion appliance, a water amount adjusting device and a gas amount adjusting device which operate when a voltage is applied by the power source battery, and a voltage of the power source battery is monitored. And a voltage monitoring circuit for operating a water amount adjusting device when a voltage is applied by the power source battery, and then a gas amount adjusting device is activated. The load is the largest among the actuating devices, and at the start of the operation of the instrument part by turning on the ignition switch, the power supply voltage is lowered by the application of voltage by the power source battery, and the power supply voltage is reduced. A combustion appliance, characterized in that it comprises an operation stopping means for stopping the operation of the appliance when it is determined that the measured voltage of is less than or equal to the set value in the voltage monitoring circuit. Definitive deactivation devices.