JPH02275246A - Automatic hot water filling/supplemental supply device of bathtub - Google Patents

Abstract

PURPOSE:To supply additional hot water to a bathtub up to the preset amount of hot water through a supply pipeline for the bathtub and enable a hot water level to be returned to a preset level by filling hot water into a return pipeline in a circulation passage for additional heating after finishing the bathtub filling up to the preset amount of hot water, and by utilizing variations in an output from a hot water level sensor when the return pipeline is filled with hot water. CONSTITUTION:When a hot water level sensor 22 detects a voltage output value corresponding to a preset hot water level, said output value is stored in a controller such as an MPU. In a case where the amount of hot water in a bathtub is decreased in accordance with the use of a bath to cause a hot water level to be lowered, whereby a voltage output value from the hot water level sensor 22 is lowered, supplemental hot water is supplied into the bathtub 19 through a supply pipeline 18. Thereafter, when the hot water level sensor 22 detects a voltage output value corresponding to the preset hot water level, the operation of the supplemental supply of hot water is stopped, and simultaneously, additional heating and temperature holding operations are carried out through a circulation passage for additional heating. Thus, the hot water level can be returned to the preset level.

Description

[Detailed description of the invention] (a) Industrial application field The present invention can quickly and reliably fill a bath with a desired amount of hot water, and then add more hot water as needed. Regarding automatic hot water filling device for bath.

(B) Conventional Technology Conventionally, as a form of hot water supply system that can fill a bath with a desired amount of hot water, as shown in FIG. There is something.

That is, in FIG. 6, the salary (not shown)? The cistern 5o receives hot water from the Ik machine via the hot water supply pipe 49, and the pump 5o receives hot water from the Ik machine via the three-way switching valve 52 provided in the lower pipe 51.
It is connected in communication with the suction port 54 of No. 3.

Further, the discharge port 55 of the pump 53 is connected to a reheating heat exchanger 57 via a water flow switch 56, and on the other hand,
The reheating heat exchanger 57 is connected to a bath adapter 60 provided in the bath 59 via a bath pipe 58.

On the other hand, one end of a bath return pipe 61 is connected to the bath adapter 60, and the other end of the bath return pipe 61 is connected to the three-way switching valve 52.

Further, a water level sensor 62 is attached to the middle of the bath return pipe 61.

To explain how to fill a bath with hot water in the above hot water supply system, first, set the three-way switching valve 52 to the state shown in the figure, operate the pump 53, and turn the hot water supply pipe 49 → three-way switching valve 52 → pump 53 → reheating heat. Hot water is filled into the bath 59 via the exchanger 57 → the bath pipe 58 → the bath adapter 60.

The amount of hot water in the bath 59 is determined by the bath adapter 6.
When the water level exceeds 0, the water level sensor 62 detects the water level change (water level output change), switches the three-way switching valve 52, connects the bath return pipe 61 to the pump 53, and connects the bath return pipe 61 to the pump 53 → the bath pipe 58 → Bath 59 → Bath return piping 6
1 → Hot water is circulated through a reheating circulation channel consisting of a pump 53, and air in the bath return pipe 61 is vented.

After that, the three-way switching valve 52 is switched again, and the output of the water level change in the bus adapter is used as the reference water level, and the hot water filling flow path described above, that is, the hot water supply pipe 49 → the three-way switching valve 52
→ Pump 53 → Reheating heat exchanger 57 → Bath pipe 58
→ Hot water is continuously filled into the bath 59 via the bath adapter 60 until the set water level is reached.

Thereafter, if necessary, the three-way switching valve 52 is operated to connect the bath return piping 61 to the pump 53, and the pump 5
3 → Bath going pipe 58 → Bath 59 → Bath return pipe 61 →
A reheating circulation flow path including a pump 53 is formed to perform reheating.

(c) Problems to be Solved by the Invention However, the bath hot water supply system and bath hot water filling method described above still have the following problems to be solved! ! It had a problem.

In other words, in such a hot water supply system, only the amount of hot water is initially set, and then the set amount of hot water is dropped into the bath from the water heater. However, the drawback was that hot water could not be supplied automatically.

Specifically, even if you set the initial hot water filling amount using the controller's setting volume and the hot water filling switch, during or after using the bath, the water level in the bath does not return automatically, so you need to add additional water. It was supposed to require a switch.

Therefore, it is necessary to operate the additional hot water switch every time the water level decreases, which is cumbersome and undesirable for ensuring a comfortable bathing experience.

SUMMARY OF THE INVENTION An object of the present invention is to provide an automatic bath water filling/adding device that can solve the above problems.

(d) Means for Solving the Problems The present invention comprises a bath reheating circuit equipped with a pump and a bath dropping circuit connected to the bath reheating circuit, and the bath return piping of the bath reheating circuit is connected to the bath reheating circuit. In the bath automatic hot water filling/replenishment device that installs a water level sensor in the bath and uses the output change of the water level sensor to drop hot water into the bath up to the set water amount,
After filling the water to the set amount, fill the bath return piping with hot water using the bath reheating circuit, and then add hot water to the set amount through the bath piping, based on the output value of the water level sensor at that time, to restore the water level. This relates to an automatic bath water filling/adding device that is characterized by the following:

(e) Examples Hereinafter, the present invention will be specifically explained based on examples shown in the attached drawings.

First, the configuration of the automatic bath water filling device A according to the present invention will be specifically explained with reference to FIG.

As shown in the figure, the automatic bath hot water filling device A is similar to the hot water supply system that can fill a desired amount of hot water into the bath, similar to the automatic bath hot water filling device explained in the prior art section. Although it has a form, as described later,
The difference is that a bypass pipe for filling the bath return pipe with hot water is provided between the discharge side of the pump and the bath return pipe.

That is, in FIG. 1, the gas tank IO receives hot water through the hot water supply branch pipe 9 branched from the hot water supply pipe 8 connected to the hot water heat exchanger 7, and the pump 13 is connected to the pump 13 via the three-way switching valve 12 provided in the lower pipe 11. It is connected in communication with the suction port 14 . In addition, in the figure, 6 is a water supply pipe for supplying water to the heat exchanger 7 for hot water supply.

Further, the discharge port 15 of the pump 13 is connected to a reheating heat exchanger 17 via a water flow switch 16, and on the other hand,
The reheating heat exchanger 17 is connected to a bath adapter 20 provided in the bath 19 via a bath pipe 18.

On the other hand, one end of a bath return pipe 21 is connected to the bath adapter 20, and the other end of the bath return pipe 21 is connected to the three-way switching valve 12.

Further, a water level sensor 22 is attached to the middle of the bath return pipe 21.

In the present embodiment, in the above configuration, the discharge port 15 of the pump 13 and the middle of the bath return pipe 21 are connected by a bypass pipe 23, and a cutoff valve 24 is further attached to the bypass pipe 23.

With this configuration, by opening the shutoff valve 24, hot water can be directly supplied from the pump 13 to the bath return pipe 21, and air remaining in the pipe 21 can be removed.

Next, with reference to FIGS. 2 and 3, a method for automatically filling a bath with hot water using the automatic bath water filling device A described above will be described.

In the flowchart shown in FIG.
0), (101), and (102) are provided to detect the presence or absence of residual water in the bath 19 up to the bath adapter 20.

That is, as shown in step (100), first, the shutoff valve 24 of the bypass pipe 23 is opened and
0~1005ec), hot water supply branch pipe 9→distern lO
→ Lower piping 11 → Pump 14 → Hot water filling flow path consisting of bath pipe 18, and hot water supply branch pipe 9 → Distance lO →
Hot water is supplied to the bath 19 through an air vent flow path consisting of the lower pipe 11 → pump 14 → bypass pipe 23, and the air in the bath return pipe 21 is vented.

Thereafter, as shown in step (101), the shutoff valve 24
At the same time, the three-way switching valve 12 is operated, and the pump 14 → bath going pipe 18 → bath 19 → bath return pipe 21
→A reheating circulation flow path consisting of the pump 14 is formed to circulate hot water.

In this hot water circulation operation, if the water flow switch 16 connected to the discharge port 15 of the pump 13 is turned on continuously for a certain period of time (for example, about 205 ec), it is determined that ice remains (102Y).

If it is determined that ice remains (102Y), it is determined whether the water level in the bath 19 is higher than the set water level (103).
If the water level is higher than the set water level (103Y), reheating/warming operation is performed through the reheating circulation circuit (104).

Then, in step (102), if it is determined that there is no remaining water (102N), step (105)
As shown in the figure, open the shutoff valve 24 of the bypass pipe 23,
Hot water is supplied to the bath 19 through the bath-going pipe 18 and the bypass pipe 23 for a predetermined period of time (for example, 60 to 1005 ec), and the air in the bath-returning pipe 21 is vented.

Thereafter, as shown in step (106), the shutoff valve 24
At the same time, connect the bath 1 through the bath pipe 18.
Hot water will be supplied within 9 days.

As the hot water is supplied, the output value (pressure difference) of the water level sensor 22 provided in the bath return pipe 21 becomes Δ■, as shown in FIGS. 1 and 3. If (107Y), the three-way switching valve 12 is operated to form a reheating circulation flow path and circulate hot water (108).

In this hot water circulation operation, if the water flow switch 16 connected to the discharge port 15 of the pump 13 is turned on continuously for a certain period of time (for example, about 405 ec), it is assumed that the bath return pipe 21 is filled with hot water. You will have to judge.

Note that these are determined based on the circulating meteor, the pipe diameters of the bath-going pipe 18 and the bath-return pipe 21, and the certainty of filling with water.

Further, after the water flow switch 16 has turned on, it is assumed that the reference water level has been detected (109), and the three-way switching valve 12
is activated, the flow path changes from the reheating circulation flow path to the hot water filling flow path, and hot water is filled through the bath pipe 18 (110).

When the output value (pressure difference) of the water level sensor 22 provided in the bath return pipe 21 becomes ΔVl as shown in FIGS. 1 and 3 due to the hot water supply, (IIIY
), it is determined that hot water has been filled in the bath 19 to the set water level, and the hot water filling operation is stopped.

Thereafter, reheating and heat retention operation is performed through the reheating WIN circuit (104).

In addition, in the sequence of the automatic bath water filling method described above, the opening time of the shutoff valve 24 of the bypass pipe 23 is approximately 30 seconds.
It is said that

Moreover, the pressure loss of the above-mentioned shutoff valve 24 is made to be the same level as that on the bathtub piping 18 side where the reheating heat exchanger 17 is attached, and when the shutoff valve 24 is open, the bathtub piping 18 and the bath return piping 21 are I try to keep it flowing. (This is because the water filling time of the bath return pipe 21 is set by time).

Furthermore, in this embodiment, as shown in FIG. 4, when the water level in the bathhouse drops, the water level automatically returns to the set water level.

That is, in the addition hot water operation sequence shown in FIG. 4, when the water level sensor 22 detects the voltage output value V corresponding to the set water level in step (111) in FIG.
will be stored in a control device such as an MPU (200
).

When the bath 2nFlk decreases as the bath is used, the water level drops, and the output voltage value of the water level sensor 22 drops below vL (201Y), hot water is added into the bath 19 through the bath pipe 18. (202).

After that, when the water level sensor 22 detects the voltage output value V corresponding to the set water level (203Y), the additional hot water operation is stopped (204), and additional heating and heat retention operation is performed through the additional heating circulation circuit (205). .

In the above-mentioned automatic hot water replenishment method, as shown in FIG. It is also possible to selectively set the set water level in five levels according to preference.

(f) Effects As explained above, in the present invention, after completing the hot water filling work to the set mercury, the bath return piping is filled with hot water in the bath reheating circuit, and the output value of the water level sensor at that time is used as the standard. The water level is restored by adding hot water to the set amount through the bath pipe.

Therefore, there is no need to separately provide a hot water switch, and the operability of the controller is improved. That is, it is possible to eliminate the troublesome operations required by the bather to compensate for insufficient water level by operating the faucet or by operating the above-mentioned addition bath switch.

In addition, in the above-mentioned embodiment, the mounting point of the water amount sensor 22 is not limited to the bath return pipe 21 in any way, but for example, the water flow sensor 22 may be mounted at any point in the flow path from the distiller 10 to the pump 13 to the bath forward pipe 18. It's okay. Alternatively, a water flow sensor provided for feedforward control on the hot water supply side may be used.

[Brief explanation of drawings]

Fig. 1 is a conceptual configuration explanatory diagram of the automatic bath water filling device according to the present invention, Fig. 2 is a flowchart showing the sequence of the automatic bath water filling method according to the invention, and Fig. 3 shows the operating state of the water level sensor. Graph, FIG. 4 is a flowchart showing the sequence of the bath automatic refilling method according to the present invention,
FIG. 5 is an explanatory diagram of the conceptual configuration of a controller, and FIG. 6 is an explanatory diagram of the conceptual configuration of a conventional automatic bath water filling device. In the figure, A: Bath automatic hot water filling device 10: Distern 13: Pump 16: Water volume switch 17: Reheating heat exchanger 18: Bath going pipe 19: Bath 20: Bath adapter 21: Bath return pipe 22: Water level sensor 23 :Bypass pipe 24:Shutoff valve

Claims (1)

[Claims] 1. A bath reheating circuit equipped with a pump (13) and a bath drop-in circuit connected to the bath reheating circuit,
A water level sensor (
22) is installed and uses the change in the output of the water level sensor (22) to drop hot water into the bath up to the set water level. to fill the bath return pipe (21) with hot water, and then fill the bath return pipe (18) with hot water based on the output value of the water level sensor (22) at that time.
) This is an automatic hot water filling and refilling device for a bath, which is characterized by adding hot water up to a set amount of water through a pipe ( ) and then returning the water level.