JPH051847A - Bath hot water supply device - Google Patents

Abstract

PURPOSE:To make it possible to fill up a bath tub with hot water and control the temperature of the hot water in automatic made simply by connecting with an existing electric hot water heater and hence resolve the shortage problems of hot water. CONSTITUTION:There are provided an additional hot water heating heater 18 which heats the water in a bath tub 6, an additional heating circuit 18A laying out a pump 16 which circulates bath water through the additional heating heater 18, a hot water side flow rate control valve 9 which controls the flow rate of supply hot water of a hot water storage tank of an electric hot water heater 1A, a water side flow rate control valve 8 which controls the flow rate of water and a hot water injection circuit 22A connected with the additional heating circuit 18A from the two flow rate control valves 8 and 9 by way of a hot water injection on/off valve 22. A temperature detector 19 and a water level sensor 20 are installed to the additional heating circuit 18A where a power source is incorporated from a power source wiring connection section of the electric hot water heater 1A. In addition, power is controlled not to be supplied to both the heater for the electric hot water heater 1A and the additional heating heater 18 simultaneously in structure.

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 device for a bath which is connected to an electric water heater to automatically supply hot water to a bath.

[0002]

2. Description of the Related Art In the conventional hot water supply to a bath by an electric water heater, as shown in FIG. 3, a water supply port 2 of a hot water storage tank 1 incorporated in an electric water heater 1A is connected to a water supply source via a pressure reducing valve 3. ,
A heater 4 is provided in the hot water storage tank 1, and hot water is discharged from the hot water outlet 5
From the mixing tap 7 to the bathtub 6, and the water side of the mixing tap 7 is connected to a water supply source so that hot water and water are mixed from the mixing tap 7 to be supplied to the bathtub 6.

In the electric water heater, the water in the hot water storage tank 1 is boiled up by the heater 4 which uses electric power at midnight, and at the time of filling the bathtub 6 with hot water, the mixing stopper 7 is adjusted to obtain an appropriate temperature of hot water. I am trying to get hot water. Then, after using the bath water, in order to recover the hot water temperature from the lowered state to an appropriate temperature, the mixing tap 7 is set to a high temperature and the hot water in the hot water storage tank 1 is poured into the bathtub 6 as it is. I tried to raise the temperature of the bathtub 6.

[0004]

However, in the above-described conventional hot water supply to the bath, it is inconvenient because it is necessary to manually fill the bathtub 6 with water and adjust its temperature by manually adjusting the mixing stopper 7. When the hot water in the hot water storage tank 1 is exhausted, there is a problem that the hot water in the bathtub cannot be reheated.

The present invention solves the above-mentioned problems. It is possible to automate bath filling and temperature control simply by setting up (connecting) with an existing electric water heater without newly constructing a power supply wire, and it is convenient. An object of the present invention is to provide a hot water supply device for a bath, which has high performance and can eliminate the fear of running out of hot water.

[0006]

In order to achieve the above object, the present invention provides an electric water heater having a built-in hot water storage tank, a heater for heating water in the hot water storage tank, and a reheating heater for heating bath water. A reheating circuit in which a pump that circulates the bath water is arranged in the reheating heater, a hot water side flow rate adjusting valve that adjusts a hot water flow rate of the hot water tank and a water side flow rate adjusting valve that adjusts a water flow rate, A pouring circuit connected to the reheating circuit from the two flow rate adjusting valves via a pouring opening / closing valve, and a temperature detector and a water level sensor are provided in the reheating circuit, and a power supply for the electric water heater is provided. Power is drawn from the electric wire connection portion, and control is performed such that the heating heater of the electric water heater and the reheating heater are not energized at the same time.

[0007]

According to the present invention, with the above-described structure, the hot water in the hot water storage tank can be heated to an appropriate temperature by the two flow rate adjusting valves, and the hot water can be poured into the bathtub from the open pouring opening / closing valve through the reheating circuit. The water level sensor can detect the water level in the bathtub and automatically stop filling the water at the set water level. It is possible to operate the pump, circulate the bath water, reheat the bath water by the reheating heater, detect the bath temperature with the temperature detector of the reheating circuit, and automatically stop the reheating at the set temperature. The heaters of the electric water heater are not energized simultaneously while the heaters of the electric water heater are energized, and the heaters of the electric water heater are energized only when the heaters of the electric water heater are not energized. The power line of the water heater can be used as it is.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A bath water heater according to an embodiment of the present invention will be described below with reference to FIG. The same members as those of the conventional example are designated by the same reference numerals and the description thereof will be omitted.

That is, the pipe from the water supply source is connected to the water supply port 2 and the water side flow rate adjusting valve 8 via the pressure reducing valve 3, and the pipe from the hot water supply port 5 to the hot water side flow rate adjusting valve 9 and the hot water supply pipe 10. Are connected. Connection adapter 11 connected to bathtub 6
The return pipe 12 and the outgoing pipe 13 are connected to the pipe connection portions 14 and 15 of the bath water heater, respectively.

The reheating circuit 18A includes a pipe connecting portion 14
The pump 16, the two-way valve 17, the reheating heater 18, and the pipe connecting portion 15 are connected to each other, and the reheating circuit 18 is further connected.
A is provided with a temperature detector 19, a water level sensor 20, and a flow switch 21. In the pouring circuit 22A, the pouring opening / closing valve 22 from the pouring side flow rate adjusting valve 8 and the pouring side flow rate adjusting valve 9,
The reheating circuit 1 downstream of the pump 16 via the check valve 23
8A is connected. A vacuum breaking valve 24 is provided in the pouring circuit 22A to separate the water supply source from the bath 6.

Next, the operation of the above configuration will be described. At the time of automatic pouring, the two-way valve 17 is closed and the pouring opening / closing valve 22 is opened with the pump 16 stopped. At this time, the mixed hot water adjusted to an appropriate temperature by the water side flow rate adjusting valve 8 and the hot water side flow rate adjusting valve 9 is poured into the bathtub 6 from the connection adapter 11 through the pipe connection portion 15 and the outflow pipe 13 of the reheating circuit 18A. Get off. Further, since the return pipe 12 to which the water level sensor 20 is connected is closed at one end by the two-way valve 17, the water pressure of the bath water from the connection adapter 11 is transmitted and the pressure is detected by the water level sensor 20.

Until the water surface of the bathtub 6 reaches the connection adapter 11, the pressure of the water level sensor 20 does not change because the return port of the connection adapter 11 is open to the atmosphere.
When the water surface reaches the connection adapter 11, the return port is filled with hot water, and thereafter, the change in the water level from the connection adapter 11 is detected by the water level sensor 20. After detecting the change in the water level, the two-way valve 17 is opened and the hot water is also flown into the return pipe 12. After a certain period of time, the pouring on-off valve 22 is closed, the pump 16 is operated, the bath water is circulated in the reheating circuit 18A, and the air remaining in the reheating circuit 18A is discharged.

Thereafter, the two-way valve 17 is closed and the pump 16
With the signal of the water level sensor 20 when the water supply was stopped as a reference signal, the pouring / opening valve 22 is opened again to restart pouring. After that, when the increase in the signal from the reference signal reaches the set water level, the pouring / opening valve 22 is closed and pouring into the bathtub 6 is automatically stopped.

After that, when the bath water level is lowered by using the hot water in the bathtub 6, the pouring on-off valve 22 is opened again to pour water into the bathtub 6 and the water is automatically replenished to the point where the bathwater level reaches the set water level.

When the hot water temperature in the bathtub 6 drops, the two-way valve 17 is opened to operate the pump 16 and the reheating heater 18 is energized to circulate and heat the hot water in the bathtub. Return pipe 12
The temperature of the bath water from is detected by the temperature detector 19, and when the set temperature is reached, the energization of the reheating heater 18 is stopped, the operation of the pump 16 is stopped, and the reheating is automatically stopped. The reheating can be started manually or when the temperature of the bathtub hot water is detected by the temperature detector 19 by operating the pump 16 at regular intervals and the temperature falls below the set temperature.

FIG. 2 is a wiring configuration diagram of the power supply wires of the bath water heater according to the embodiment of the present invention. A power supply wire 26 corresponding to the amount of power used by the electric water heater is connected to the power wire connection portion 25 of the electric water heater. The power supply wire connection portion 27 of the bath water heater is connected to the power wire connection portion 25 of the electric water heater from the power supply wire connection portion 25 of the electric water heater, which corresponds to the amount of power used by the bath water heater. While the reheating heater 18 of the bath water heater is energized to circulate and heat the bath water, a signal is sent from the controller 29 of the bath water heater to the controller 30 of the electric water heater. The heater 4 is not energized. Only when the reheating heater 18 of the bath water heater is not energized, the heating heater 4 of the electric water heater can be energized.
Therefore, even when setting up the bath water heater of the present invention to the existing electric water heater, the power supply wire 26 of the electric water heater can be used as it is, and only the power supply wire 26 of the bath water heater is wiring work. Mu.

According to the configuration of this embodiment, the bathtub 6 can be automatically filled with water at an appropriate temperature and amount, and automatic water replenishment is also possible. Further, the reheating heater 18 can automatically reheat the hot water in the bathtub without using the hot water in the hot water storage tank 1.
You can eliminate the worry of running out of water. Furthermore, the power supply wire 26 of the electric water heater can be used as it is,
Wiring work only for the power supply wire of the bath water heater is sufficient.

[0018]

As described above, the hot water supply device for a bath according to the present invention has a reheating heater for heating bath water, a reheating circuit having a pump for circulating the bath water in the reheating heater, and an electric water heater. And a water-side flow rate adjusting valve for adjusting the flow rate of hot water discharged from the hot water tank
A pouring circuit connected from the two flow rate adjusting valves to the reheating circuit via a pouring opening / closing valve, and a temperature detector and a water level sensor are provided in the reheating circuit, and the electric water heater of the electric water heater is provided. Since power is drawn from the power wire connection, the heating heater of the electric water heater and the reheating heater are controlled not to be energized at the same time. It can be done at any time, and automatic water replenishment is also possible. Also, by the reheating heater,
The hot water in the bathtub can be automatically reheated without using the hot water in the hot water storage tank, so there is no worry of running out of hot water in the hot water storage tank. Also, since the power supply wire of the electric water heater can be used as it is, no new power supply wire construction is required, and a simple wiring work of only the power supply wire of the bath water heater is sufficient.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram in which a bath water heater according to an embodiment of the present invention is connected to an electric water heater.

[Fig. 2] Wiring configuration diagram of power supply wires of the hot water supply device for the bath

FIG. 3 is a schematic configuration diagram showing a hot water supply state of a bath using a conventional electric water heater.

[Explanation of symbols]

 1 Hot Water Tank 1A Electric Water Heater 4 Heater 6 Bath 8 Water Side Flow Rate Control Valve 9 Hot Water Side Flow Rate Control Valve 16 Pump 18 Reheating Heater 18A Reheating Circuit 19 Temperature Detector 20 Water Level Sensor 22 Pouring Open / Close Valve 22A Pouring Circuit 25 Power wire connection

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Kenshi Akagawa 1006 Kadoma, Kadoma City, Osaka Prefecture Matsushita Electric Industrial Co., Ltd.

Claims (1)

Claim: What is claimed is: 1. An electric water heater having a built-in hot water storage tank, a heater for heating water in the hot water storage tank, a reheating heater for heating bath water, and the reheating heater for the bathtub. A reheating circuit with a pump that circulates water, a hot water side flow rate adjusting valve for adjusting the flow rate of the hot water discharged from the hot water storage tank, a water side flow rate adjusting valve for adjusting the flow rate of water, and the two flow rate adjusting valves A hot water pouring circuit connected to the reheating circuit via a hot water opening / closing valve, a temperature detector and a water level sensor are provided in the reheating circuit, and power is drawn from a power wire connection portion of the electric water heater. At the same time, a hot water supply device for a bath is controlled so that the heating heater of the electric water heater and the reheating heater are not energized at the same time.