JPH0317172Y2 - - Google Patents

Description

[Detailed description of the invention] (Application field and overview of the invention) The present invention relates to a bath kettle with a water heater, in particular a bath kettle with a hot water filling device. This relates to a bathtub with a water heater that maintains the hot water supply circuit in an open state, and when the water level in the bathtub reaches a predetermined level, a water level detection device opens the electrical circuit of the electromagnet and shuts off the hot water supply circuit. be.

Furthermore, this invention prevents abnormal heating due to erroneous operation by completely stopping the operation of the appliance if the reheating operation is mistakenly performed while filling the water.

(Prior art and its problems) As a device for filling a bathtub with hot water using a water heater,
I have already proposed Utility Application No. 60-46653, but
As shown in FIGS. 5 and 6, in addition to the first thermocouple 11 for the pilot flame safety device 10, there is also a second thermocouple 11.
2 is provided, an electromagnet 21 is inserted into the circuit of this second thermocouple, a hot water filling valve 22 held in an open state by this electromagnet is inserted into the hot water filling circuit 20 of the hot water supply circuit, and further, An output switch 24 of a water level detection device 23 for detecting the water level in the electromagnet 21 is inserted into the circuit of the electromagnet 21.

In this device, the relationship between the hot water filling valve 22 and the electromagnet 21 is as shown in FIG.
When the operation part 25 for filling the water is pushed in after it is ignited, the magnetic body 26 integrated with the water filling valve 22 is attracted and held in the open state as shown in the figure.
It is filled with hot water.

Further, when the water level in the bathtub 2 reaches a predetermined level, the output switch 24 is opened by the action of the water level detection device 23, and the hot water filling circuit 20 is closed by the return operation of the hot water filling valve 22.

However, if a bath kettle is added to the water heater equipped with a hot water filling device, and the configuration is equipped with a water circuit and a gas circuit as shown in Fig. If the main burner provided below the heat exchanger A is fired, there is a risk that this heat exchanger will become abnormally heated.

While the hot water is being filled, the amount of hot water in the bathtub 2 is small.
Moreover, this is because the temperature of this hot water has been raised in advance by the water heater heat exchanger B, and furthermore, each part is in an operable state in the above-mentioned filled state.

(Technical Problem) The present invention provides a second thermocouple 12 in addition to the first thermocouple 11 for the pilot fire safety device 10,
An electromagnet 21 that keeps the hot water filling valve 22 open and closed that opens and closes the hot water filling circuit 20 is inserted into this thermocouple circuit, and when the water level in the bathtub 2 reaches a predetermined water level, the water level detection device 23 detects the electromagnet In a bathtub equipped with a hot water filling device that automatically closes the hot water filling valve 22 by cutting off the water circuit, the device for stopping the hot water filling operation when the water level in the bathtub reaches a set level is simplified. At the same time, it is an object of the present invention to prevent abnormal heating of the heat exchanger A for a bathtub when a reheating operation is mistakenly performed while filling hot water.

(Technical Means) The technical means of the present invention taken to solve the above problems are as follows: The normally closed contact of the output switch 24 is connected in series through a parallel circuit with the switch 3, and the normally closed contact of the output switch 24 is inserted in series with the series circuit of the second thermocouple 12 and the electromagnet 21 for filling hot water. The electric power required to keep the electromagnetic valve 15 of No. 10 open is approximately equal to the series output of the first and second thermocouples 11 and 12, and the reheating switch 3 is opened only during reheating and is not opened at other times. Now let's assume that the switch is in the closed state.

(Operation) The above technical means of the present invention operates as follows.

When the pilot burner 1 is ignited by the igniter, the water heater becomes usable. When the water heater is filled with water, the electromagnet 21 acts to keep the water filling valve 22 open, and the water pressure-responsive gas valve 27 opens. Due to this action, the main burner on the water heater heat exchanger B side burns, and hot water is supplied from the hot water filling circuit 20 to the bathtub 2.

When the water level in the bathtub 2 reaches a predetermined level, the contacts of the water level detection device 23 are switched to cut off the circuit of the electromagnet 21, and the hot water supply from the hot water filling circuit 20 is stopped by the above-described action, completing the filling of hot water.

If the reheating operation is performed after that, even if the reheating switch 3 is opened in conjunction with the reheating operation section 30, the first and second thermocouples 11, 12
are connected via the water level detection device 23, and as long as the pilot burner 1 is in the ignition state, the reheating operation proceeds.

When the reheating operation is performed while filling the hot water, the contacts of the water level detection device 23 are connected to the electromagnet 21 side, so when the reheating switch 3 is opened, the first and second thermocouples 11 and 12 are shut off. As a result, the pilot flame safety device 10 is turned off, the safety valve cuts off the gas circuit, and combustion of the appliance stops.

Therefore, there is no fear that the bath heat exchanger A will become abnormally heated.

(Effects) Since the present invention has the above configuration, it has the following unique effects.

If the reheating operation is performed while the hot water is being filled, the combustion of the appliance will be stopped, thereby preventing abnormal heating of the bath heat exchanger due to erroneous operation.

Furthermore, if the water level in the bathtub 2 drops after filling with hot water, reheating cannot be done, so reheating can be prevented.

Furthermore, since the hot water filling valve 22 is controlled by the thermoelectromotive force generated by the second thermocouple 12 to stop the hot water filling operation, compared to the type disclosed in Japanese Patent Application Laid-open No. 51-125572. The device for filling hot water can be simplified.

(Example) Hereinafter, an example of the present invention will be described based on FIGS. 2 to 4.

This embodiment is implemented in a bathtub with a water heater similar to the previously described conventional example (Fig. 7), and the ignition device 5 operates in conjunction with the operation of the pilot flame safety device to turn on the pilot flame burner 1. It was designed to be ignited.

Therefore, the relationship between the hot water filling circuit 20 and the bathtub 2 for automatic hot water filling, and the electromagnet 21 and the hot water filling valve 22
Alternatively, the relationship with the second thermocouple 12 is configured similarly to the conventional example described above.

Furthermore, in this embodiment, the configurations of the gas circuit and water circuit are the same as those shown in FIG.
A main burner 13 and a second main burner 14 for a bath kettle are arranged side by side, and this main burner is located below a heat exchanger A for a bath that is arranged side by side with a heat exchanger B for a water heater.

Further, a solenoid valve 15 of the pilot flame safety device 10 is inserted upstream of the two main burners 13 and 14, and as shown in FIG. 3, this solenoid valve opens in conjunction with the ignition operation. It is set in the state.

To explain in more detail the electric circuit of the above-mentioned bath pot with water heater, the ignition device 5 includes a high voltage generator (hereinafter referred to as a sparker 52), a timer 53 connected in parallel with this, and a circuit of the sparker 52. Output contact 54 of this inserted timer 53
It is connected to the battery 4 via the ignition switch 41.

The first thermocouple 11 and the second thermocouple 12 are connected in series via the normally open contact of the output switch 24 of the water level detection device 23 and the first normally closed contact 31 of the reheating switch 3. connected to the pilot flame safety device 10
An excitation coil 16 of the solenoid valve 15 is connected in series to a series circuit of first and second thermocouples 11 and 12.

In addition, the electromagnet 21 for filling hot water is connected in series through the second thermocouple 12 and the normally closed contact of the output switch 24, and the circuit of this electromagnet 21 is connected to the other one of the reheating switches 3 described above. 2 Normally closed contact 32
This is the configuration in which .

In the above embodiment, when the operating part of the pilot safety device 10 is pushed in, the gas circuit to the pilot burner 1 is opened and at the same time the ignition switch 41 is closed.
The ignition device 5 is operated to ignite the pilot burner 1. As a result, the first and second thermocouples 11, 1
Due to the thermoelectromotive force of 2, the exciting coil 16 is activated by the solenoid valve 15.
The valve body is held in the open state, and combustion of the pilot burner 1 continues.

Next, when the hot water filling valve 22 is opened,
The first main burner 1 is
3 becomes a combustion state and becomes a hot water filling state. The magnetic body 26 connected to the hot water filling valve 22 is attracted by the electromagnetic force of the electromagnet 21, and hot water is supplied from the hot water filling circuit 20 to the bathtub 2. At this time, the power supplied to the electromagnet 21 is the sum of the thermoelectromotive force generated by the second thermocouple 12 and that generated by the battery 4. In addition, the first thermocouple 11
Since the circuit to the excitation coil 16 which is directly connected to the excitation coil 16 includes devices that cause resistance increase, the conditions are the same as if a certain amount of resistance 17 were inserted as shown in FIG. Therefore, the amount of current distributed by the battery 4 to the excitation coil 16 side is extremely small, and the negative effect of connecting the battery 4 to the first thermocouple 11, that is, even if the pilot burner 1 is extinguished, the solenoid valve 15 is There will be no inconvenience such as the valve not closing.

When the water level in the bathtub 2 reaches a predetermined water level, the contacts of the output switch 24 are switched to cut off the circuit to the electromagnet 21, and the electromagnet 21 and the magnetic body 26 are no longer attracted to each other, and the hot water filling valve 22 is automatically closed. The valve is turned on and the hot water filling is completed.

Thereafter, when the water temperature in the bathtub 2 decreases as the bath is used, the inside of the bathtub 2 is heated by the bath heat exchanger A.
The bath valve 18 inserted into the circuit to the main burner 14 is opened to reheat. This bath valve is designed to be linked with the reheating switch 3, and by this reheating operation, each output contact of the reheating switch 3 is opened, and the circuit to the excitation coil 16 of the pilot flame safety device 10 is connected to the output. It is connected only through the contacts of switch 24. Therefore, if the water level in the bathtub 2 is sufficient,
Rekindling continues as it is. However, if it is insufficient, the contacts of the output switch 24 will be in the state shown by the solid line in FIG.
The circuit to the gas station will be opened, and the gas circuit will be shut off, making it impossible to reheat. This water level detection device 23
The combination of this and the output switch 24 functions as a dry firing prevention device.

In addition, in this embodiment, the first reheat switch 3
Since the normally closed contact 31 is inserted between the first and second thermocouples 11 and 12, and the second normally closed contact 32 is inserted into the circuit of the electromagnet 21, when reheating is performed while filling hot water, the output switch 24 With the contacts connected to the electromagnet 21 side, by opening these first and second normally closed contacts, both the electromagnet 21 and the first main burner 13 are turned off, resulting in a complete stop state. Therefore, accidents due to malfunction can be prevented.

Further, in this embodiment, the ignition switch 41 is closed by the ignition operation, and the pilot burner 1 is closed.
Since the electromagnetic valve 15 is held open only when the first thermocouple 11 is ignited and a predetermined thermoelectromotive force is generated, even if the pilot burner 1 is not ignited and the hot water filling operation is performed, the solenoid valve 15 is kept open. , the electromagnet 21 is not turned on, and erroneous operation can be prevented.

In this embodiment, the hot water filling valve 22 is connected to the electromagnet 2.
1, but as shown in FIG.
Alternatively, the valve may be held in the open state by the locking mechanism, and the locking by this locking device may be released by the operation of the adsorption member 61 facing the electromagnet 21.

In this case, since the hot water filling valve 22 is closed by the impact force when the adsorption member 61 separates from the electromagnet 21, the operation of the hot water filling valve 22 becomes reliable.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the principle of the present invention, Fig. 2 is an electric circuit diagram of an embodiment of the invention, Fig. 3 is an explanatory diagram of a pilot flame safety device, Fig. 4 is an explanatory diagram of another embodiment, and Fig. 5 is an explanatory diagram of the principle of the present invention. Figure~7th
The figure is an explanatory diagram of a conventional example, and in the figure, 10... pilot flame safety device, 11, 12... first and second thermocouples, 20... hot water filling circuit, 21...
Electromagnet, 22... Hot water filling valve, 23... Water level detection device, 24... Output switch, 3... Reheating switch, 30... Reheating operation section, 31... First normally closed contact.

Claims (1)

[Scope of utility model registration request] In addition to the first thermocouple 11 for the pilot flame safety device 10, a second
A thermocouple 12 is provided, and an electromagnet 21 that holds the hot water filling valve 22, which opens and closes the hot water filling circuit 20, in an open state is inserted into this thermocouple circuit, and when the water level in the bathtub 2 reaches a predetermined water level, In a bathtub equipped with a hot water filling device in which the water level detection device 23 automatically closes the hot water filling valve 22 by interrupting the circuit of the electromagnet,
The first and second thermocouples 11 and 12 are connected to the water level detection device 2.
The normally open contact of the output switch 24 of No. 3 and the reheating switch 3 are connected in series through a parallel circuit, and the second thermocouple 12 and the electromagnet 21 for filling hot water are connected in series.
The normally closed contact of the output switch 24 is inserted in series in the series circuit with the first and second thermocouples 11 and 12, and the power required to maintain the solenoid valve 15 of the pilot flame safety device 10 in the open state is transferred to the first and second thermocouples 11 and 12. The reheating switch 3 is a switch that is opened only during reheating and is closed at other times.