JPH06249432A - Hot water supplying unit - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a water heater that uses batteries as a power source and is easy to use and has a long battery life. A gas passage is provided between the first solenoid valve 4 and the second solenoid valve 5 to the pilot burner 9, and the pilot burner 9 is burned for a certain period of time by the timer 29 even after the main burner 7 has extinguished. Next, when the water flows, the pilot burner 9 immediately transfers the flame to the main burner 7 to reduce the change in the hot water temperature, and the timer 29 stops the power supply to reduce the consumption of the battery 12. Try.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water heater for timer-controlled power supply from a battery to a gas supply solenoid valve.

[0002]

2. Description of the Related Art Conventionally, this type of water heater using a battery has been used in a small water heater as shown in FIGS. 7 and 8, and since it requires no electrical work and is easy to operate, It is the mainstream configuration for small water heaters.

When the operation switch 19 is turned on, the control circuit 8
Check the voltage of the battery 12 for power supply and the temperature fuse 13 that blows the heat exchanger 3 when the heat exchanger 3 overheats and disconnects the power supply circuit. If it is normal, open the solenoid valve 4 that controls the opening and closing of the gas, and ignite When the plug 11 starts discharging, the geared motor 14 rotates and the water faucet 15 is opened. Water stopcock 15
When the water is opened, the water passes from the water inlet through the water pressure responsive device 1 which receives the supply pressure to open the water, and the water pressure responsive valve 18 which controls the opening and closing of the gas in conjunction with the valve opening operation of the water pressure responsive device 1 When opened, the gas comes from the gas inlet, solenoid valve 4, hydraulically operated valve 1
8 and flows to the pilot burner 9 and the main burner 7, and the pilot burner 9 and the main burner 7 are ignited by the discharge from the ignition plug 11.

When ignition is detected, the ignition detector 10 detects it, and the discharge of the spark plug 11 is turned off to perform normal combustion. Then, the heat generated by the combustion of the main burner 7 is absorbed by the heat exchanger 3, and the hot water is discharged from the hot water outlet 16.

Next, when the use of the water heater is stopped, the operation switch 19 is turned off, the solenoid valve 4 is turned off, the geared motor 14 is then rotated in the reverse direction, and the water faucet 15 is closed.
Since the hydraulic pressure responsive device 1 does not work, the hydraulic pressure responsive valve 18 is closed.

[0006]

Generally, a hot water supply device often has a long hot water supply pipe, and the time until hot water is discharged becomes long. In particular, in the case of intermittent use, as described in the conventional example, if the ignition operation is performed once, the water temperature changes greatly and the water heater becomes very difficult to use. Therefore, the present invention provides a water heater having a long battery life and a quick rise in hot water temperature upon re-ignition.

[0007]

In order to achieve the above object, a first means of a water heater according to the present invention is provided with a first solenoid valve and a second solenoid valve, and a first solenoid valve and a second solenoid valve are provided. A gas passage to the pilot burner is provided from the interval, and even after the main burner extinguishes, the pilot burner is burned for a certain time with a timer,
Next, when the water is run, the pilot burner immediately transfers the heat to the main burner to reduce the change in the hot water temperature. In addition, the provision of a timer suppresses the fact that the battery will be consumed faster if the normal-fire type is used.

The second means is a construction in which the main burner is not ignited until after the ignition of the pilot burner is detected in the first means, and it takes a long time to ignite when an air trap is formed in the gas pipe. To solve the drawbacks,
At the time of ignition, the first solenoid valve and the second solenoid valve are opened simultaneously.

In the third means, in the second means, the inrush current when the solenoid valve is opened becomes large, and the voltage drop of the battery causes the safety device when the battery is exhausted to operate in a relatively short time. The second solenoid valve is opened after the first solenoid valve is opened in order to prevent the usage period of the above from being shortened.

[0010]

According to the first aspect of the present invention, the main burner immediately ignites during intermittent use of hot water to suppress the drop in hot water temperature, and when the main burner extinguishing timer measures a certain period of time, the power is automatically turned on. OFF
Therefore, the consumption of the battery can be suppressed.

Further, by the above-mentioned second means, it is possible to ignite early even if there is an air trap in the gas pipe after the start of operation, shorten the time for trial operation, etc., and accelerate the rise of the initial hot water temperature. It is possible to provide a user-friendly water heater.

Further, since the time for judging the consumption of the battery can be extended by the third means, the usability can be further improved.

[0013]

Embodiments of the present invention will be described below with reference to the drawings.

1 and 2 show a first embodiment,
Parts given the same numbers as in the conventional example perform the same operation with the same name. When a hot water tap (not shown) provided at the end of the hot water outlet is opened, water passes through the water pressure responding device 21 from the water inlet, and the water pressure responding device 21 acts to turn on the water flow switch 2 to send a signal to the control circuit 28. Sent.

Upon receipt of the signal, the control circuit 28 checks the voltage of the battery 12 for power supply and the temperature fuse 13, and if the control circuit 28 determines that the voltage is normal, it turns on the igniter incorporated in the control circuit 28. Open the solenoid valve 4.

The gas then flows from the gas inlet to the first battery valve 4
And the second solenoid valve 5, and flows to the pilot burner 9, and is ignited by the discharge from the spark plug 11. When ignited, the ignition detector 10 detects ignition and the igniter is turned off.
Then, the second solenoid valve 5 is opened.

Then, the gas flows to the main burner 7 and is transferred by the flame of the pilot burner 9. Main burner 7
The heat due to the combustion of is absorbed by the heat exchanger 3, and the hot water flows from the hot water outlet to the hot water tap.

When the hot water tap is closed, the water pressure responsive device 21
Does not work, the water flow switch 2 is turned off, and this signal is sent to the control circuit 28. The control circuit 28 receives this signal, closes the second solenoid valve 5, extinguishes the main burner 7, but keeps the first solenoid valve 4 in the open state by the timer circuit 29 incorporated in the control circuit 28 for the timer time. This timer time is economically set at the timing when the usage rate of re-outflow hot water decreases considering the actual usage.

When the hot water supply tap is opened within this timer time, the water pressure responsive device 21 operates and the ON signal of the water flow switch 2 is sent to the control circuit 28 to open the second solenoid valve 5. Then, the gas flows to the main burner 7 and the flame of the pilot burner 9 ignites immediately so that the drop in the hot water temperature can be suppressed during intermittent use, which is convenient and easy to operate, and the water heater that is easy to install. Can be provided.

After the timer time has elapsed, the first solenoid valve 4
Is closed, the pilot burner 9 is extinguished, and the supply of the battery 12 to the control circuit 28 is stopped, so that the consumption of the battery can be suppressed.

A second embodiment will be described with reference to FIG. Although no particular structure is shown, only the internal function of the control circuit 38 is different from that of the first embodiment.

When the hot water tap provided at the tip of the hot water outlet is opened, the water pressure responsive device 1 is activated, an ON signal is sent from the water flow switch 2 to the control circuit 38, and the control circuit 8 receives this signal and the battery 12 of the battery 12 receives the ON signal. When the voltage is checked and the temperature fuse 13 is checked and it is determined that the temperature is normal, the control circuit 3
The igniter incorporated in 8 is turned on, and then the first solenoid valve 4 and the second solenoid valve 5 are simultaneously opened.

The gas flows to the pilot burner 9 and the main burner 7, and the discharge from the spark plug 11 ignites both the pilot burner 9 and the main burner 7.
When ignited, the ignition detector 10 detects ignition, the igniter is turned off, and normal combustion is continued. The subsequent operation is the same as in the first embodiment.

A third embodiment will be described with reference to FIGS. 4, 5 and 6. Although no particular structure is shown, only the function of the control circuit 48 is different from that of the first embodiment.

When the first solenoid valve 4 and the second solenoid valve 5 are simultaneously opened as in the second embodiment, the solenoid valve 4, as shown in FIG.
Since the adsorption current of No. 5 flows all at once, the voltage of the battery 12 drops sharply instantaneously. When the voltage of the battery 12 drops, the energy shortage of the igniter and the control circuit 48 occur.
Since the voltage judgment value provided for preventing the malfunction of the electronic parts of the above is approached, when the battery is exhausted, the voltage judgment value is reached in a relatively short time, and as a result, the replacement period of the battery 12 is accelerated. Become. In order to eliminate this drawback, the second solenoid valve 5 is opened after the time required for adsorption of the first solenoid valve 4 (normally about 0.3 seconds) elapses. As shown in FIG. As a result, the voltage drop can be suppressed and the usage period of the battery 12 can be extended. The other operations are the same as those in the second embodiment.

[0026]

As described above, according to claim 1 of the water heater of the present invention, when hot water is re-extracted within a fixed time after extinguishing the main burner, the hot water supply characteristics are maintained, and after the fixed time elapses, the pilot burner is operated. By stopping energization of the first solenoid valve that supplies gas, it is possible to prevent inefficient consumption of the power supply battery.

According to the second aspect of the present invention, not only the pilot burner but also the main burner can be quickly ignited, so that the hot water temperature can be quickly raised, which is convenient.

Further, according to the third aspect, by opening the second solenoid valve after the lapse of a short time required for adsorption of the first solenoid valve, the hot water temperature rises quickly and the battery life can be extended. .

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a water heater according to a first embodiment of the present invention.

FIG. 2 is a flowchart explaining the operation of the water heater.

FIG. 3 is a flowchart for explaining the operation of the water heater according to the second embodiment of the present invention.

FIG. 4 is a flowchart for explaining the operation of the water heater according to the third embodiment of the present invention.

[Fig. 5] Characteristic diagram of the water heater

FIG. 6 is another characteristic diagram of the water heater.

FIG. 7 is a configuration diagram of a conventional water heater.

FIG. 8 is a flowchart explaining the operation of the water heater.

[Explanation of symbols]

 1 Water Pressure Reactor 3 Heat Exchanger 4 First Solenoid Valve 5 Second Solenoid Valve 7 Main Burner 8 Control Circuit 9 Pilot Burner 10 Ignition Detector 12 Battery

Claims (3)

[Claims] 1. A first solenoid valve and a second solenoid valve for controlling gas supply to each of a pilot burner and a main burner, and communication between the first solenoid valve and the second solenoid valve and the pilot burner. Gas passage, a battery power source for driving the first solenoid valve and the second solenoid valve, and the first solenoid valve is closed after a certain time has elapsed after closing the second solenoid valve, the battery A water heater with a control circuit that turns off the power. 2. A pilot burner for simultaneously opening the first solenoid valve and the second solenoid valve in response to a water flow start signal for hot water supply.
The water heater according to claim 1, wherein both main burners are ignited. 3. When the first solenoid valve and the second solenoid valve are opened in response to a water flow start signal for hot water supply to ignite both the pilot burner and the main burner, the required opening time of the first solenoid valve elapses. The water heater according to claim 1, wherein the second solenoid valve is opened later.