JPS59104042A - Controller for bath boiler with hot water supplier - Google Patents

Abstract

PURPOSE:To obtain a control system enabling the operation of bath boiler to be performed at plural places by providing a simple and low-pressure circuit for the control system. CONSTITUTION:At the beginning of operation on the hot water supplier side, a fuel is burned by a burner 4 to heat water in a hot water supplier 1. When the operation switch 12 or 13 of a bath tub is turned ON, a three-way switch circuit turns ON and voltage from resistors 15 and 16 connected in series to the three- way switch circuit and a variable resistor 14 is applied to the input (+) portion of a voltage comparator 11. Since the temperature of water in the heat exchanger case 6 is low, the resistance value of the thermister 10 is sufficiently high, and therefore, the input (-) of the voltage comparator 11 formed by potential with the serial resistor 17 becomes a high voltage. The output turns ON, a relay 18 is driven, and the operation of a circulating pump 7 is started. Hot water heated in the hot water supplier 1 is directed through a hot water circulation circuit 5 to the heat exchanger 8 to heat the water of the heat exchanger case 6 and the bath tub 9. When detected temperature by the thermister 10 is raised and the resistance value is reduced, the input (-) voltage of the voltage comparator 11 is lowered, the relay 18 turns OFF, the circulating pump 7 is stopped, and the heating of water in the bath tub is stopped.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a control device for a bathtub with a water heater.

Structure of the conventional example and its problems In the conventional bath pot with water heater, the operation switch for the bath boiler is housed in the remote control unit along with the operation switch for the water heater, and is installed in the kitchen or the like, or is attached to the water heater. Separately from the operating switch, a sub-remote control unit that is dedicated to the bathtub is generally included, and in either case, the bathtub can only be operated from one location. Therefore, in the former case, there is an inconvenience when you want to adjust the water temperature while taking a bath, and in the latter case, you have to go all the way to the bathtub in order to reheat the bath in advance. There was a point.

Furthermore, when installing a sub-remote control inside the bathtub,
Complete insulation protection is required, especially for commercial power supplies (
8010°), there were problems such as inability to prevent dangers such as electric shock and a complicated remote control configuration.

OBJECTS OF THE INVENTION In view of the above-mentioned problems, it is an object of the present invention to realize control that allows the operation and operation of a bathtub to be performed at multiple locations using a simple and extremely low-pressure circuit configuration.

Structure of the Invention The basic structure of the present invention to achieve the above object is that two switches are provided for operating the bathtub, these two switches mutually constitute a three-way switch, and the three-way switch When the circuit is ON, one input potential of the voltage comparator is changed through a resistor, and the other input of the voltage comparator is connected in series with a thermistor that detects the water temperature of the bath kettle. A potential created by a resistor is applied, and the output of this voltage comparator controls the operation and stopping of the bathtub.

With the above configuration, the bathtub can be operated from two locations, improving usability. Further, since the circuit configuration is simple and can be configured with a low-pressure circuit, safety and workability are improved when installing a bathtub operation switch in a bathtub.

Description of examples Hereinafter, one embodiment of the present invention will be described based on the drawings.

Figure 1 is a longitudinal cross-sectional view of a bathtub with a water heater that has one set and one channel.
Reference numeral 1 denotes a water heater having a water supply port 2 and a hot water supply outlet 3 on its upper surface, and water in this water heater 1 is heated by a combustion device 4. 5 is a hot water circulation circuit, 6 is a heat exchange case, 7 is a circulation pump, and 8 is a heat exchanger. By the operation of this circulation pump 7, hot water heated by the water heater 1 passes through the hot water circulation circuit 6. The water is guided to the heat exchanger 8 and heats the water inside the heat exchange case 6. The heated hot water has a structure in which natural convection occurs with the water in the bathtub 9, thereby warming the water in the bathtub 9.

Note that 10 is a thermistor attached to the wall of the heat exchange case 6 to detect the temperature of the water inside.

FIG. 2 is a control circuit diagram of the bathtub (circulation pump 7) of this embodiment, in which reference numeral 11 represents a voltage comparator (comparator), and 12 and 13 represent the first and second voltage comparators, respectively. The second bath boiler operation switch is a 3-way switch circuit. Numeral 14 is a variable resistor for adjusting the temperature of the water in the bathtub, and resistors 15 and 16 are used to set the voltage potential of the voltage comparator. 10 is the hot water temperature thermistor described above, and 17 is a series resistor, which sets the voltage potential of the voltage comparator. 1 is a DC relay driven by the output of the voltage comparator, and its contacts drive the circulation pump 7 on the 1 ooV circuit side (not shown).
ED, 20 is its protective resistance, and the bath pot operation switch 12
．． 13 is connected in series with a three-way switch circuit.

FIG. 3 is an external view of the remote controller of this embodiment, where A is the main remote controller and B is the sub remote controller. Inside the main remote control A, there is the aforementioned first bath boiler operation switch 12. Variable resistor 14. An LED 19 is housed therein, and a water heater operation switch 21, a temperature control variable resistor 22, etc. are also housed therein.

On the other hand, the sub-remote controller B houses the aforementioned second bathtub operation switch B.

These remote controllers A and B are connected to the remote control cable 2.
3.24, it is connected to a control device (not shown) provided on the water heater main body, and the switches 12.13 are also mutually connected on the water heater main body side.

Next, the operation of this embodiment will be explained.

First, when operation of the water heater side is started by the operation switch 21, the combustion device 4 performs combustion and heats the water in the water heater 1. Next, turn on the bath kettle operation switch 12 or 13.
Then, the three-way switch circuit is turned on, and the voltage from the variable resistor 14 connected in series with the three-way switch circuit is applied to the voltage comparator 11. On the other hand, heat exchange case 6
Since the water inside is in a low temperature state, the resistance value of the thermistor 10 is sufficiently high. Therefore, the voltage comparator 11 created by the voltage division with the series resistor 17 has a high potential, and the output becomes 0.
N (L), the relay 18 is driven and the circulation pump 7
starts driving. Then, the hot water heated by the water heater 1 is guided to the heat exchanger 8 through the hot water circulation circuit 5, and heats the water in the heat exchange case 6 and the bathtub 9. In this way, the temperature detected by the thermistor 1o increases, and as its resistance value decreases, the potential of the voltage comparator 11 decreases, and finally becomes less than the potential of the voltage comparator 11. Then, the output becomes OFF (H), the relay 18 turns OFF, the circulation pump 7 stops, and the water in the bathtub reaches the correct boiling temperature. From now on, the circulation pump 7 will operate at this temperature. Repeat ON-OFF to keep the pot warm. Here, if any of the bathtub operation switches 12 and 13 is turned OFF again, the 3-way switch circuit is turned off and the operation of the bathtub is stopped.

Furthermore, when the variable resistor 14 is changed, the voltage comparator 1
The temperature of the water changes, and the boiling temperature can be set accordingly.

In addition, the LED 19 lights up only when the 3-way switch circuit by the 1st bath pot switch 12.13 is ON, so by lighting this LED, you can check whether the bath pot operation is set or not. Since it cannot be done in two places, the main remote control that contains the water heater's operation part has
Contains the bath kettle operation switch, LED and variable resistor,
If you install the bath kettle in the kitchen, and put the second bath kettle operation switch in the bath remote control and install it in the bathroom, you can start the bath kettle using the main remote control in advance, and then use the bath kettle remote control in the bathroom when taking a bath. Since the operation of the bathtub can be controlled by operating the bathtub, the user can easily obtain the desired water temperature.

Furthermore, the circuit configuration is simple, and since the remote control circuit can be made into a low voltage circuit, remote control construction is easy and safety is high.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a bathtub with water heater according to an embodiment of the present invention, Fig. 2 is a control circuit diagram of the bathtub with water heater, and Fig. 3 is an external view of the remote control of the bathtub with water heater. It is a diagram. 1...Water heater, 4...Combustion device, 7.
...Circulation pump, 1o...Thermistor,
11... Voltage comparator, 12.13...
Bath pot operation switch, 14...Variable resistance, 15
, 16.17... Resistance, 19... Indicator (LElml. Name of agent: Patent attorney Toshio Nakao and 1 other person 1st)
Figure γ 2 σ Figure 2 z73 Figure 3

Claims (3)

[Claims] (1) Two switches are installed to operate the bath kettle,
The above two switches constitute a three-way switch, and when this three-way switch circuit is ON, the input potential of one of the voltage comparators is changed via a resistor, and on the other hand,
The other input of the voltage comparator is given a potential formed by a thermistor and a series resistor for detecting the rising temperature of the bath pot, and the output of the voltage comparator controls operation and stop of the bath pot. A control device for a bathtub with a heating device, characterized in that: (2) The resistor connected to the input side of the voltage comparator is a variable resistor, and the temperature of the water in the bath pot can be varied by the variable resistor.
A control device for a bathtub with a water heater as described in Section 1. (3); The control device for a bathtub with a water heater according to claim 1, wherein one of the 11 switches has an indicator such as an LED or a lamp connected in series with the 3-way switch circuit.