JPH0227347Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) The present invention relates to an ignition control device for a bathtub with a gas water heater, in which ignition and extinguishment are performed by pressing an operation button.

(Prior art) Conventional combustion control devices for gas combustors include, for example,
As shown in Publication No. 59-113646, the capacitor is connected to the first relay by a changeover switch during ignition operation, and can be switched and connected to a charging circuit consisting of a DC power source and a second relay during extinguishing operation, The operation of the relay connects the DC power source to the igniter and the pressing solenoid of the electromagnetic safety valve that opens and closes the fuel supply passage, and
There is one in which a DC power source is connected to the electromagnetic coil of the electromagnetic safety valve by activation of a relay.

However, in the above circuit configuration, if the water flow switch is malfunctioning, if the ignition operation is performed after water flow, raw gas will be released, which is dangerous. In addition, two springs are used to attract the electromagnetic safety valve, and two relays are also required, resulting in rapid battery consumption. Furthermore, when the battery voltage decreases, the gas valve becomes insufficiently adsorbed and retained, resulting in problems such as malfunction.

(Problems to be Solved by the Invention) The present invention solves the above-mentioned conventional problems and provides an ignition control device for a bathtub with a gas water heater that consumes less battery, operates reliably, and is highly safe. It is in.

(Means for solving the problem) In order to solve the problem, the present invention has a switch that switches the capacitor from the charging side to the discharging side by pressing the operating shaft, and a switch that is connected in series with the hydraulic response device. A relay, a normally open contact that supplies DC power to the igniter and electromagnetic coil by energizing the relay, a restraint mechanism that restrains the operating shaft in the first, second, and third positions, and a safety valve. A first valve and a second valve provided in the gas passage leading to the hot water supply burner and the bath burner.
At the first stage position of the operating shaft, the capacitor is switched to the charging side in conjunction with the operating shaft, and a safety valve, a pilot valve, and a second
At the second stage position of the operating shaft, the capacitor is switched to the discharge side in conjunction with the operating shaft, and the safety valve, pilot valve, first valve, and second valve are opened, and the third stage of the operating shaft is closed. In the stepped position, the capacitor is positioned on the discharge side in conjunction with the operating shaft, the safety valve and the pilot valve are opened, and the first valve is closed.

(Example) Examples of the present invention will be specifically described below based on the drawings.

Reference numeral 1 indicates a safety valve 2 which opens and closes a gas supply path leading to the burner in a valve body, a pilot valve 3 which opens and closes a gas passage to the pilot burner, and a first valve 4 facing oppositely to each other which opens and closes a gas passage to the main burner. 2
A valve 5 is provided. The first valve 4 opens and closes a first valve port 6 communicating with the safety valve 2, and the second valve 5 opens and closes a second valve port 7 communicating with the main burner. 8 is an electromagnetic coil that opens and closes the safety valve 2. 31 is a restraint mechanism consisting of a pin 32 and a guide groove 33;
By pressing the operation button 9, the operating shaft 30 is restrained in the first, second and third positions, and by pressing from the first position, it is restrained to the third position, and by stopping the pressing, it is restrained to the third position. It is in the second stage position, and by pressing it again, it returns to the first stage position and ignition/extinguishing operation can be performed. The safety valve 2, pilot valve 3, first valve 4, and second valve 5 are opened and closed by operating the operation button 9, and the movement of the safety valve 2 is also regulated by the electromagnetic coil 8. be done. 10 is a switch, and when the operating shaft 30 is in the third and second stage positions, the capacitor 11 is connected to a series discharge circuit consisting of a switch 12 and a relay 13 that are linked to a hydraulic response device; At the first stage position, the capacitor 11 is connected to a charging circuit using a DC power supply 14. 15 is a normally open contact that is turned on when the relay 13 is activated; 16 is an igniter that emits a spark when the capacitor 11 is discharged; and 17 is a battery confirmation lamp.

When the capacitor 11 is discharged, the DC power supply 14
When a pilot combustion flame is formed, which will be described later, the electromagnetic coil 8 is excited by the electromotive force of the thermocouple 18, attracts and holds the safety valve 2, and opens a gas passage. 18 and 19 are thermocouples that generate an electromotive force by the combustion flame of the pilot burner 20, and 21 is a safety device that cuts off the power supply to the electromagnetic coil 8 in the event of an abnormality, closes the safety valve 2, and stops the gas supply, such as a temperature fuse. It is. 2
0 is a pilot burner, 22 is a hot water supply burner, 2
3 is a bath burner.

The present invention has such a configuration, and by pressing the operation button 9 up to the third stage, the safety valve 2 and the pilot valve 3 are pushed open and the pilot burner 20 is opened.
At the same time as the gas flows to the capacitor 11, the switch 10 is switched to the discharge circuit side of the capacitor 11, and the discharge current from the capacitor 11 is caused to flow through the relay 13, thereby closing the normally open contact 15. As a result, the electromagnetic coil 8 is excited by the current from the DC power supply 14, and the safety valve 2 is forcibly attracted against the spring 24, and the igniter 1
6 and ignite the pilot burner 20. At this time, the gas passages to the hot water supply burner 22 and the bath burner 23 are closed by the first valve 4. (Fig. 4) After a certain period of time, when the capacitor 11 has finished discharging, the relay 13 opens the normally open contact 15.
The power is turned OFF, the power supply to the electromagnetic coil 8 and the igniter 16 is stopped, and the spark of the igniter 16 is stopped. In addition, the forced attraction force of the safety valve 2 by the electromagnetic coil 8 is also eliminated, but if the pilot burner 20 is burning, the electromagnetic coil 8 will continue to be excited by the electromotive force of the thermocouple 18 to attract and hold the safety valve 2, and the pilot burner 20 will be combusted. will continue to be held. On the other hand, when the pressing of the operation button 9 is stopped, the operation button 9 becomes the second stage position and the first valve 4
is removed from the first valve port 6, and the second valve 5 is also removed from the second valve port 7, so the gas passages to the hot water supply gas valve 25 and the bath gas valve 26 are opened. (5th
) Then, when the hot water tap (not shown) is opened as necessary, the water pressure response device 27 activates the hot water gas valve 25.
is opened, the pilot burner 20 ignites the hot water supply burner 22, and hot water is supplied. Also, when the bath switch 28 is pressed, the bath gas valve 26
At the same time as the thermocouple 19 is pushed open, the bath electromagnetic coil 29 is excited by the electromotive force of the thermocouple 19, the bath gas valve 26 is attracted and energized, and the pilot burner 20 ignites the bath burner 23, causing combustion on the bath side. is started.

Next, when extinguishing the hot water supply burner 22, the hot water supply tap is closed, the water pressure response device 27 closes the hot water supply gas valve 25, and the hot water supply burner 22 is extinguished.
When extinguishing the bath burner 23, press the bath switch 28, the electromotive force from the thermocouple 19 to the bath electromagnetic coil 29 is cut off, and the bath gas valve 2 is turned off.
6 is closed and the bath burner 23 is extinguished.

When extinguishing the pilot burner 20, by pressing the operating button 9 again from the second stage position, the operating shaft 30 returns to the first stage position, the second valve 5 closes the second valve port 7, and the pilot valve 3 also closes, so the pilot burner 20 extinguishes the fire. After a predetermined period of time has elapsed, when the electromotive force of the thermocouple 18 disappears and the electromagnetic coil 8 ceases to be excited, the safety valve 2 also closes. On the other hand, the switch 10 is switched to the charging circuit side of the capacitor 11, and the capacitor 11 is charged by the DC power supply 14, and enters a standby state.

If you perform the ignition operation after the water flow operation, the switch 12 linked to the water pressure response device 27 will turn OFF.
Therefore, the discharge circuit for the capacitor 11 is not formed and the normally open contact 15 remains OFF, so the igniter 16 does not spark and there is a risk of releasing raw gas, but the first valve 4 connects the main burner to the main burner. Since the gas passage to the pilot burner and the main burner is closed and the safety valve 2 is not forcibly adsorbed and closes the gas passage to the pilot burner and the main burner, no raw gas is released. In case the hydraulic response device 27
Switch 12 that is linked to is broken and turns off when water is flowing.
In cases where this is not the case, when the ignition operation is performed after the water flow operation, the switch 12 linked to the water pressure response device 27 remains ON and the hot water supply gas valve 2 is turned on.
5 is also open, but since the first valve 4 closes the first valve port 6, the hot water supply burner 22 and bath burner 23 are closed while the operating shaft 30 is in the third stage position.
It is safe because there is no gas flowing through the route.

Also, when the voltage of the DC power supply 14 drops,
Since the safety valve 2 is mechanically pushed open by pressing the operation button 9, the safety valve 2 can be attracted and excited by the electromagnetic coil 8 even with the low voltage DC power supply 14, and malfunctions can be reduced.

(Effect of the invention) In this way, the invention can move the operation shaft to the first position and the second position.
With a restraint mechanism that restrains the stage position and third stage position,
Safety can be improved by opening and closing a first valve and a second valve provided in a gas passage from a safety valve to a hot water supply burner and a bath burner, particularly by operating the first valve in the third stage position. can.

In addition, in the third stage position of the operation shaft, by mechanically pushing the safety valve open, not only can battery consumption be reduced, but even when the battery voltage drops, the electromagnetic coil can attract and excite the safety valve and hold it. This has the effect of eliminating malfunctions.

[Brief explanation of the drawing]

Fig. 1 is an overall configuration diagram of the present invention, Fig. 2 is a sectional view of the gas valve with the operating shaft in the first stage position, Fig. 3 is a combustion control circuit diagram, and Fig. 4 is a diagram with the operating shaft in the third stage position. FIG. 5 is a sectional view of the gas valve with the operating shaft in the second stage position, and FIG. 6 is an explanatory diagram showing the restrained position of the operating shaft. 1... Valve body, 2... Safety valve, 3... Pilot valve, 4... First valve, 5... Second valve, 6
...First valve port, 7...Second valve port, 8...Electromagnetic coil, 9...Operation button, 10...Switch, 11
... Capacitor, 12 ... Switch linked to water pressure response device, 13 ... Relay, 14 ... DC power supply, 15 ... Normally open contact, 16 ... Igniter,
17...Battery confirmation lamp, 18...Thermocouple, 19
...Thermocouple, 20...Pilot burner, 21...
... Safety device, 22 ... Burner for hot water supply, 23 ... Burner for bath, 24 ... Spring, 25 ... Gas valve for hot water supply, 26 ... Gas valve for bath, 27 ... Water pressure response device, 28 ... Bath Switch, 29... Electromagnetic coil for bath, 30... Operating shaft, 31... Restraint mechanism, 3
2...pin, 33...guide groove.

Claims (1)

[Scope of utility model registration request] A switch that switches the capacitor from the charging side to the discharging side by pressing the operating shaft, a relay connected in series with the switch that works with the hydraulic response device, and a normally open switch that supplies DC power to the igniter and electromagnetic coil by energizing the relay. A contact point, a restraint mechanism that restrains the operating shaft in the first stage position, second stage position, and third stage position, and a first valve and a second valve provided in the gas passage from the safety valve to the hot water supply burner and the bath burner. At the first stage position of the operating shaft, the capacitor is switched to the charging side in conjunction with the operating shaft, and the safety valve, pilot valve, and second valve are closed, and when the operating shaft is at the second stage position, the operating shaft In conjunction with this, the capacitor is switched to the discharge side, and the safety valve, pilot valve, first valve, and second valve are opened, and in the third stage position of the operation shaft, the capacitor is positioned on the discharge side in conjunction with the operation shaft. An ignition control device for a bathtub with a gas water heater, characterized in that a safety valve and a pilot valve are opened at the same time, and a first valve is closed.