JPS6143175Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a bathtub device that uses the same water level detector to prevent the bathtub from emptying and to control water supply to the bathtub. The bathtub is equipped with an emptying prevention device to prevent it from emptying, and a water alarm (buzzer, etc.) to prevent water from overflowing when filling the bathtub.
Or equipped with a water supply shutoff device. The dry boiling prevention device detects the water level inside the heat exchanger of the bathtub using a switch installed in the electrical circuit of a solenoid valve that is energized by the electromotive force of a thermocouple heated by the pilot flame of the burner. When the water level in the heat exchanger does not reach a predetermined water level, a solenoid valve stops supplying fuel to the burner. When the water level in the bathtub reaches a predetermined level, the water supply stop device causes a water level detector installed in the bathtub to operate a buzzer to notify the user of this, or operates a solenoid valve to stop the water supply. However, in the conventional bathtub device, the empty boiling prevention device and the water supply stop device each have separate water level detectors, so the structure is complicated and the equipment cost is high. In order to eliminate this drawback, according to another conventional example, one water level detector is used in common for the water level alarm device and the water level alarm device, and until the water level alarm device operates, the water level detector for the water level alarm is used. There is a bath kettle device that is used as a water level detector for a water boiling prevention device and is switched by a manual changeover switch after the water level alarm device is activated. However, this conventional device requires a manual changeover switch, which inevitably complicates the structure.Also, when the alarm device is activated, manual changeover is required, making the operation cumbersome. It was hot. The present invention aims to eliminate this drawback.

An embodiment of the present invention will be described with reference to FIG. 1
is the main body of the bathtub, 2 is the heat exchanger, 3 is the burner, 4
is a bathtub, and the heat exchanger 2 is connected to the bathtub 4 through two pipes so that hot water in the bathtub is circulated. A water level detector 5 is connected to the heat exchanger 2 by a pipe 6, and has a diaphragm 7 to which the water pressure in the heat exchanger 2 is applied, and a spring plate 9 on which a rod 8 provided on the diaphragm 7 acts. It is equipped with a micro switch 10. 11 is a thermocouple heated by a pilot flame of a pilot burner (not shown); 12 is a solenoid valve that supplies fuel (gas) to the burner 3; together with the water level detector 5, these form a dry boiling prevention device. . 13 is buzzer 14, knob 1
5 and a controller with an electrical control circuit including a power supply, which together with the water level detector 5 form a water cut-off device.

FIG. 2 is an electric circuit diagram when the micro switch 10 is a double-throw changeover switch, and FIG. 3 is an electric circuit diagram when it is used as a single-throw changeover switch. In the figure, 16 is an electrical control circuit including a power source. When the water level in the bathtub 4 is below the specified value,
Since the water pressure applied to the diaphragm 7 of the water level detector 5 is small, the spring plate 9 does not act on the micro switch 10. In this state, the microswitch 10 closes contact b and opens contact a. Therefore, the dry heating prevention device consisting of the thermocouple 11 and the electromagnetic valve 12 closes the circuit, and the electromagnetic valve 12 is energized by the activation force of the thermocouple 11 to close the gas flow path and prevent dry heating. On the other hand, the water supply stop device including the buzzer 14 does not operate because the contact a of the micro switch 10 is open. When the water level in the bathtub 4 reaches a predetermined water level, the water pressure applied to the diaphragm 7 of the water level detector 5 causes the micro switch 10 to switch from contact b to contact a. Therefore, the solenoid valve 12 is the thermocouple 11
is released from the electromotive force to open the gas flow path, and the buzzer 14 closes the circuit to notify that the water level in the bathtub 4 has reached a predetermined water level. The user stops the water supply to the bathtub 4 using the knob 15 in response to the notification from the buzzer 14, or closes the water supply solenoid valve using the electric control circuit 16. Note that FIGS. 2 and 3 show an example of how to use the micro switch 10, and the micro switch can be used in various ways depending on the type of bathtub device.The gist of the present invention is as follows. The water level detector for preventing dry boiling and the water level detector for stopping the water supply are shared, and there is no need to manually switch between using it for preventing dry boiling and when using it for stopping the water supply (alarm). It is in.

As described above, the bathtub device of the present invention includes a bathtub water level detector that detects the water level of the bathtub and notifies you when the water level reaches a predetermined level, or stops the water supply to the bathtub; It also uses a water level detector to prevent dry heating, which detects the water level inside the heat exchanger and controls the supply of fuel to the burner that heats the heat exchanger, and the water level detector switch also prevents dry heating. It also has a built-in contact to switch between water supply and water supply stop (or full water alarm), allowing for automatic switching, which simplifies the device compared to conventional bathtub devices, reduces equipment costs, and
It also has the advantage of being extremely simple to operate.

[Brief explanation of drawings]

Figure 1: Diagram showing the configuration of an embodiment of the present invention, Figure 2
Figure: Diagram showing one embodiment of the electric circuit of the present invention, No. 3
Figure: A diagram showing another embodiment of the electric circuit of the present invention. 1...Main body of the bathtub, 2...Heat exchanger, 3...
Burner, 4... Bathtub, 5... Water level detector, 6...
Pipe, 7...Diaphragm, 8...Rod, 9
...Spring plate, 10...Micro switch, 11...
... thermocouple, 12 ... solenoid valve, 13 ... controller, 14 ... buzzer, 15 ... knob, 16 ... electric control circuit.

Claims (1)

[Scope of Claim for Utility Model Registration] A diaphragm that communicates with the water chamber of the bathtub and heat exchanger and detects when the water pressure in the water chamber reaches a predetermined value corresponding to a predetermined water level; A switch contact whose operation is controlled and which remains on until the water pressure reaches the predetermined value and turns off after exceeding the predetermined value, and the first contact have opposite on and off states. a switch having a contact point of another switch, a dry boil prevention device whose operation is controlled by one of the switch contacts, and a water supply control device whose operation is controlled by the other switch contact point. Characteristic bath kettle device.