JPS6247011Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bathtub with a water heater, and particularly to a composite gas appliance such as a bathtub with a water heater in which the combustion section of the water heater and the combustion section of the water heater are located apart from each other.

In conventional gas appliances of this kind, the main burners of the bathtub and water heater are installed close to each other, and both main burners are ignited by one pilot burner. The safety of both combustion parts can be ensured. That is, when one pilot burner is extinguished, if the pilot safety device shuts off the gas circuits to these two main burners, raw gas release accidents can be prevented.

However, in appliances where the main burner for water boiling and the main burner for bathing are installed separately, it becomes impossible to ignite both main burners with one pilot burner, and one pilot fire safety device has two combustion parts. safety cannot be ensured.

As a safety device for such appliances, it is conceivable to insert separate pilot flame safety devices into the gas circuits for the bath and the water heater, but in this case, the gas circuit configuration would be complicated.

The present invention has been made in view of this point, and is an object of the present invention to ensure the safety of combustion sections located far apart by making one solenoid valve correspond to two thermocouple circuits.

The technical means of the present invention for solving the above problems is to provide separate pilot burners in the vicinity of two separately located main burners, and arrange thermocouples in close proximity to each of these pilot burners, Each of these thermocouples is connected in parallel to an excitation coil of a common solenoid valve, a changeover switch is inserted between the excitation coil and the thermocouple,
The selector switch is linked to the operating shaft of a valve device that controls the combustion of the two main burners, and when the operating shaft is positioned at the combustion position of one of the main burners, only the corresponding thermocouple circuit is closed. This was done so that it would be done.

According to the above technical means of the present invention, the operating shaft is one of the two main burners (hereinafter referred to as the first main burner).
When the thermocouple circuit is placed in the combustion position (hereinafter referred to as the first operation position), only one thermocouple circuit is closed to the excitation coil of the solenoid valve, and due to the relationship with the pilot burner installed near the first main burner, Functions as a pilot flame safety device. Next, when the operating shaft is positioned at a position (hereinafter referred to as the second operating position) where the other main burner (hereinafter referred to as the second main burner) is burnt,
Similarly, the pilot safety device is associated only with the pilot burner corresponding to the second main burner.

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

There is only one solenoid valve that functions as a safety valve for the pilot flame safety device, and the configuration of the gas circuit is simpler than in the case where a thermocouple type pilot flame safety device consisting of a combination of a solenoid valve and a thermocouple is attached to each main burner. is simplified.

When the operating shaft is switched from one use position to the other use position, the changeover switch connects the already heated thermocouple to the other thermocouple, and at this point the excitation coil circuit is immediately opened. Since the solenoid valve closes when Inconveniences caused by this can be prevented.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of embodiments of the present invention will be explained in detail below with reference to the drawings.

The illustrated embodiment is implemented in a bathtub with a water heater, and the first main burner 1 is connected to a bath heat exchanger 2.
The second main burners 3 correspond to the water heating heat exchangers 4, respectively, and pilot burners 5a and 5b are provided adjacent to each main burner.

A main gas circuit 7 in which a solenoid valve 6 is inserted is connected to each main burner in a branch manner, and each main gas circuit 8 is connected to the first main burner 1 and the second gas circuit 9 is connected to the second main burner 3. A first valve 10 and a second valve 11 for burner control are inserted, respectively, and are gas-connected to various fire burners 5a, 5b from the downstream side of the electromagnetic valve 6 and the upstream side of these valves. In addition, the gas circuit to this pilot burner also has a separate pilot valve (first type fire valve 18).
a, the second type fire valve 18b) is inserted.

A first thermocouple 12a is disposed near the pilot burner 5a, and a second thermocouple 12b is disposed near the pilot burner 5a. Indicator meters 15a and 15b connected in parallel to these thermocouples are separately provided.

Further, the first valve 10, the second valve 11, the first type fire valve 18a, the second type fire valve 18b, and the solenoid valve 6 are all controlled and operated by one operating shaft 16,
This rotation of the operating shaft 16 holds the electromagnetic valve 6 in an open state, and a mechanism (not shown) is incorporated in which the solenoid valve 6 is biased in the valve closing direction when the operating force is released, and the first valve 10 And the second valve 11 can be selectively opened. Further, this operating shaft is interlocked with an ignition means (not shown), and by rotating it to the first operation position and the second operation position, the ignition means is activated, and the first type fire valve 18a or the second type fire valve 18a or the second type fire valve The safety valve 18b opens and acts to ignite the pilot burners 5a and 5b.

In the above embodiment, when the operating shaft 16 is located at the first operating position, the solenoid valve 6 opens, only the first valve 10 and the first type fire valve 18a are opened, and at the same time, the ignition means is opened. It operates and ignites the pilot burner 5a. At this time, the changeover switch 14 is closed on the first thermocouple 13a side on the first main burner 1 side,
When a predetermined electromotive force is generated in the thermocouple circuit, the solenoid valve 6 is held in an open state by the electromagnetic force of the coil 13, and at this time, one of the first indicator meters 15a indicates that the thermoelectromotive force in the thermocouple circuit is This is displayed so that the adsorption open state of the electromagnetic valve 6 can be determined. In this state, even if the operating force of the operating shaft 16 is released, the solenoid valve 6 is maintained in the open state by the above action.

Here, when the pilot burner 5a disappears, the coil 1
The electromagnetic force 3 disappears, and the solenoid valve 6 automatically closes.
This also applies to the case where no flame is formed in the pilot burner 5a during the ignition operation, that is, when there is an ignition error.

Even when the other one is rotated to the second operating position,
Similarly to the above, the second thermocouple 12b on the second main burner 3 side functions as a safety device in association with the solenoid valve 6.

In this embodiment, when the operating shaft 16 is rotated to one operating position, only one pilot burner is ignited.
8a, if the configuration is such that the second pilot flame valve 18b is not inserted into the pilot flame circuit, the opening of the solenoid valve 6 brings the circuits to both pilot flame burners 5a and 5b into communication, and one ignition means ( For example, the output of a combination of an ignition transformer and an ignition switch linked to an operating shaft generates sparks in both spark plugs 17a and 17b facing the various fire burners, and both pilot burners 5a and 5b generate sparks. ignite. Therefore, the ignition device and its gas circuit are also simplified compared to a structure in which each type of fire burner is ignited separately.

In the illustrated embodiment, the first main burner 1 and the second main burner 3 are selectively used.
Although this is done by opening and closing the valve 11, this can also be done by a switching socket and branching piping from the switching socket to each main burner will function in the same way as in the above embodiment.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the present invention, and in the figure, 1...first main burner, 3...second main burner, 5
a...Pilot burner, 5b...Pilot burner, 6...
Solenoid valve, 12a...first thermocouple, 12b...second
Thermocouple, 13... Coil, 14... Selector switch.

Claims (1)

[Scope of utility model registration request] Separate pilot burners are installed near the two main burners, which are located separately. Thermocouples are placed close to each of the pilot burners, and these thermocouples are connected in parallel to the excitation coil of a common solenoid valve. A changeover switch is inserted between the excitation coil and the thermocouple, and the changeover switch is interlocked with the operation shaft of a valve device that controls the combustion of the two main burners, and the operation shaft is connected to one of the main burners. A safety device for composite gas appliances that closes only the corresponding thermocouple circuit when placed in the combustion position.