JPH05141783A - Hot-water supplying and bathing device - Google Patents

Abstract

PURPOSE:To simplify a work and enlarge the degree of freedom of designing by enalrging the arrowable range of height of installation of a bathtub remarkably. CONSTITUTION:A circulating circuit 16 for heating bathtub, through which hot-water and water in a bathtub 2 are circulated, is provided with a water level sensor 1. The subject device is provided with an amplifying circuit, amplifying the output of the water level sensor 1 in accordance with a reference voltage, and a reference voltage changing circuit, changing the reference voltage of the amplifying circuit so that the output of the water level sensor 1 becomes zero volt when the circulating circuit 16 for heating bathtub is sealed by the hot-water and water in the bathtub 2. Farther, a microcomputer, deciding the water level in the bathtub 2 in accordance with the output of the amplifying circuit, is provided to constitute a hot-water supplying and bathing device 15. Resolution is increased in accordance with the employing range of the device inspite of the height of installation of the bathtub 2 whereby an accuracy can be improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water supply bath device for heating water by a heat source (gas, oil, electricity) and pouring the heated water into a bath tub.

[0002]

2. Description of the Related Art In recent years, a hot-water supply bath device, which is equipped with a remote controller for controlling the operation of a heat source device and is capable of automatically operating the filling operation of a bathtub of a bath, has begun to spread widely as a product.

[0003]

However, in this kind of hot-water supply bath apparatus, it is necessary to adjust the installation position (height difference) of the bathtub in order to set the bath water level to the desired water level by the remote control. It was Further, when the bathtub is installed on the second floor, the output of the water level sensor has to be used by switching the output range to be used according to the height difference, which is very complicated.

In view of the above circumstances, it is an object of the present invention to provide a hot water supply bath apparatus which can be used without switching and setting the output range of the water level sensor according to the installation position (height difference) of the bathtub.

[0005]

That is, according to the present invention, the hot and cold water in the bathtub (2) is circulated to the bath heat exchanger (17) through the bath heating circulation circuit (16), and the bath heat exchanger (17) is circulated in the bathtub. In a hot-water supply bath device (15) for performing hot water replenishment, and supplying hot water of a hot-water supply heat exchanger (26) to the bathtub via the bath heating circulation circuit to fill the bathtub with hot water. The bath heating circulation circuit includes a water level sensor (1) provided in the bath heating circulation circuit, and amplification means (37) for amplifying the output of the water level sensor according to a reference voltage. A reference voltage changing means (38) for changing the reference voltage of the amplifying means so that the output of the water level sensor when the water level is sealed with hot water becomes a predetermined level,
It comprises water level determination means (13) for determining the water level of the bath according to the output of the amplification means.

Numbers in parentheses are for convenience of showing corresponding elements in the drawings, and therefore, the present invention is not limited to the description in the drawings. This also applies to the “claims” and “action” columns.

[0007]

With the above-described structure, the present invention functions so that when the bathtub (2) is filled with water, the water level input is automatically corrected according to the height difference of the bathtub.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. 1 is a configuration diagram showing an embodiment of a hot water supply bath device according to the present invention, FIG. 2 is a circuit diagram showing an example of a control device, FIG. 3 is a front view showing an example of a remote controller, and FIG. 4 is an output characteristic of a water level sensor. 5 is a graph showing the positional relationship (height difference) with respect to the water level sensor of the bathtub, and FIG. 6 is a view showing the water level of the bathtub.

As shown in FIG. 1, the hot water supply bath apparatus 15 according to the present invention has a bathtub 2, and a bath heating circulation circuit 16 is formed in the bathtub 2 with both ends thereof being opened in the bathtub 2. It is provided in a loop. Circulation circuit 16 for bath heating
A heat exchanger 17 for bath is provided in a substantially central portion of the so as to connect the outflow pipe 16a and the return pipe 16b to each other. The outflow pipe 16a of the circulation circuit 16 for bath heating has a semiconductor pressure sensor or the like. A water level sensor 1, a bath thermistor 11, a bath pump 5, and a running water switch 6 are provided, and a hot water outlet thermistor 12 is provided in a return pipe 16b of the bath heating circulation circuit 16. A bath burner 27 is installed below the bath heat exchanger 17, and a bath proportional valve 21, a bath gas valve 22 and a common gas are connected to a first gas pipe 29 connected to the bath burner 27. A valve 23 is provided. In the vicinity of the bath burner 27, the bath burner motor 2
4 is provided in a form capable of supplying combustion air to the bath burner 27.

As shown in FIG. 1, the hot water supply bath apparatus 15 has a hot water supply circuit 25, and one end of the hot water supply circuit 25 has a return pipe 16 between the hot water discharge thermistor 12 and the bathtub 2.
The other end is connected to a water source (not shown) such as city water. The hot water supply circuit 25 includes a hot water supply heat exchanger 2
6, a hot water supply thermistor 20, a pouring valve 7, a hopper 33, a pouring valve 8, a check valve 18, and a pouring counter 19 are provided. Hot water supply circuit 2 between the hot water supply thermistor 20 and the pouring valve 7.
A hot water supply tap 35 is connected to the fifth portion via a hot water supply pipe 34, and a drainage pipe 36 is connected to the hopper 33 via an overflow valve 9. A hot water supply burner 28 is installed below the hot water supply heat exchanger 26, and a second gas pipe 30 connected to the hot water supply burner 28 is provided with a hot water supply proportional valve 31 and a hot water supply gas valve 32. ing. The tip of the second gas pipe 30 has the bath gas valve 22 and the common gas valve 2
3 is connected to the portion of the first gas pipe 29. Further, in the vicinity of the hot water supply burner 28, the hot water supply burner motor 1 is provided.
4 is provided so that combustion air can be supplied to the hot water supply burner 28.

By the way, a microcomputer 13 is incorporated in the hot water supply bath device 15, and the microcomputer 13 has a first input port 1 as shown in FIG.
An amplifier circuit 37 is connected via 3a, and the water level sensor 1 is connected to the tip of the amplifier circuit 37. A reference voltage changing circuit 38 is connected to the microcomputer 13 via an output port 13c, and the reference voltage changing circuit 38 is connected to the amplifier circuit 37.
Further, the microcomputer 13 has a second input port 1
The running water switch 6 is connected via 3b. Furthermore, the bath thermistor 11, the hot water supply thermistor 12, the hot water supply thermistor 20, etc. are connected to the microcomputer 13 on the input side, and the bath pump 5, the pouring valves 7, 8 are connected on the output side. The overflow valve 9, the common gas valve 23, the hot water supply gas valve 3
2, the hot water supply proportional valve 31, the bath gas valve 22, the bath proportional valve 21, the hot water supply burner motor 14, the bath burner motor 24, etc. are connected. A remote controller 3 is connected to the microcomputer 13, and a bath automatic operation switch 4 and the like are provided on the remote controller 3, as shown in FIG.

Since the hot-water supply bath device 15 according to the present invention has the above-described structure, when the hot-water supply bath device 15 is used to fill the bathtub 2 with hot water, there is no hot water in the bathtub 2, and FIG. Push the bath automatic operation switch 4 on the remote control 3 shown in. Then, the microcomputer 13 drives the bath pump 5 to check the ON / OFF operation of the running water switch 6. When the running water switch 6 is in the OFF state, the pouring valves 7 and 8 are opened and the overflow valve 9 is opened to burn the hot water supply burner 28 to heat it to a predetermined set temperature. Tap water is supplied into the bathtub 2 through the hot water supply circuit 25.

When the pouring counter 19 detects that the pouring of a predetermined amount (for example, about 90 l) is completed,
The pouring valves 7 and 8 are closed, the bath pump 5 is driven, and the ON / OFF operation of the running water switch 6 is checked. At this time, when the running water switch 6 is OFF (that is, when there is no running water), the pouring operation (about 30 l after the second time) is repeated until the running water switch 6 is turned ON.

When the running water switch 6 is in the ON state, the driving of the bath pump 5 is stopped and the water level in the bathtub 2 is stabilized, and then the height difference of the bathtub 2 is judged based on the output of the water level sensor 1. To do.

When the installation position of the bathtub 2 is higher than that of the water level sensor 1 as shown by the solid line in FIG. 5, the water level sensor 1 outputs a voltage of 2.5 V or more (see FIG. 4). Therefore,
The microcomputer 13 converts the analog voltage input to the first input port 13a into a digital value and reads the current input voltage.

Next, the microcomputer 13 outputs a PWM output having a predetermined pulse width from the output port 13c as a bath height correction output so that the input value to the first input port 13a becomes "0". Variable output of PWM output.

A PWM output having a predetermined pulse width is output to the output port 1
By outputting from 3c, the input value to the first input port 13a becomes "0". The water level in the bathtub 2 at this time is shown in FIG.
It becomes the "0" position shown in.

Then, from the water level sensor 1 to the first input port 1 up to the level corresponding to the water level set by the remote controller 3.
While monitoring the input value to 3a, the pouring valves 7 and 8 are opened to perform pouring, and when the set water level is reached, the pouring valves 7 and 8 are closed to fill the bathtub 2 with water. Is complete.

On the other hand, when the installation position of the bathtub 2 is lower than that of the water level sensor 1 as shown by the broken line in FIG. When the circulation is detected and the circulation circuit 16 for bath heating is sealed with water, an appropriate PWM output is performed from the output port 13c so that the input value to the first input port 13a becomes "0". After adjusting to, the water level of the bathtub 2 is maintained at a predetermined water level.

When the circulation check is performed and it is determined that there is circulating water, if the input voltage level of the first input port 13a is "0" (V) or "5" (V), the position of the bath 2 is Error processing is performed assuming that the device is installed beyond the range of ± 4m.

Thus, the water level installation range of the bathtub 2 is automatically adjusted according to the height difference of the bathtub 2,
It is possible to always perform highly accurate detection regardless of the installation height of the bathtub 2.

That is, regardless of the installation height of the bathtub 2, the output of the amplifier circuit 37 is adjusted to "0" when the bath heating circulation circuit 16 is sealed with water, so that the microcomputer as the water level determination means. 13 can determine the water level of the bathtub 2 with high resolution based on this "0" input.

[0023]

As described above, according to the present invention,
Hot water in the bathtub 2 is circulated to the bath heat exchanger 17 via the bath heating circulation circuit 16 to reheat the hot water in the bathtub 2, and hot water in the hot water supply heat exchanger 26 is heated in the bath. In the hot-water supply bath device 15 for supplying water to the bathtub 2 through the water circulation circuit 16 to fill the bathtub 2,
Water level sensor 1 provided in the bath heating circulation circuit 16
And an amplification means such as an amplification circuit 37 for amplifying the output of the water level sensor 1 according to a reference voltage, and the water level when the bath heating circulation circuit 16 is sealed with hot water in the bathtub 2. The output of the sensor 1 is a predetermined level, for example "0"
A reference voltage changing means such as a reference voltage changing circuit 38 for changing the reference voltage of the amplifying means so as to be (V), and a microcomputer 13 etc. for judging the water level of the bath 2 according to the output of the amplifying means. Since the water level determination means is provided, the water level input is automatically corrected according to the height difference of the bathtub 2 when the bathtub 2 is filled with water. Expand to.

After installing the bathtub 2, the water level sensor 1
There is no need to replace the positive pressure type with the negative pressure type. Moreover, since it is not necessary to set the installation height of the bathtub 2, the construction can be simplified. Further, regardless of the installation height of the bathtub 2, the resolution is increased corresponding to the usage range, so that it is possible to improve the accuracy of detecting the water level of the bathtub 2.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a hot water supply bath device according to the present invention.

FIG. 2 is a circuit diagram showing an example of a control device.

FIG. 3 is a front view showing an example of a remote controller.

FIG. 4 is a graph showing output characteristics of a water level sensor.

FIG. 5: Positional relationship (height difference) of the bathtub with respect to the water level sensor
FIG.

FIG. 6 is a diagram showing the water level in a bathtub.

[Explanation of symbols]

 1 ... Water level sensor 2 ... Bathtub 13 ... Water level determination means (microcomputer) 15 ... Hot water supply bath device 16 ... Bath heating circulation circuit 17 ... Bath heat exchanger 26 ... Hot water supply heat exchanger 37 ...... Amplifying means (amplifying circuit) 38 …… Reference voltage changing means (reference voltage changing circuit)

Claims (1)

[Claims] 1. Hot water in a bathtub (2) is circulated to a bath heat exchanger (17) through a bath heating circulation circuit (16) to reheat hot water in the bathtub and to supply hot water. A hot water supply bath device (15) for supplying hot water from a heat exchanger (26) to the bathtub through the bath heating circulation circuit to fill the bathtub with water, which is provided in the bath heating circulation circuit. Water level sensor (1)
And an amplifying means (37) for amplifying the output of the water level sensor according to a reference voltage, and the output of the water level sensor when the bath heating circulation circuit is sealed with hot water in the bathtub is predetermined. A reference voltage changing means (38) for changing the reference voltage of the amplifying means so that the level becomes a level, and a water level determining means (13) for determining the water level of the bath according to the output of the amplifying means. Characteristic hot water bath equipment.