JPH0379955A - Hot water supplying device for bath - Google Patents

Abstract

PURPOSE:To obtain a bath system which can be separated from waterworks after a bathtub is filled with hot water by constituting the system in such a way that at a hot water supply pipe line solenoid valve for hot water supply, a tank, and a check valve are installed in turn from the upper stream and solenoid valve for drainage which is opened when the solenoid valve for drainage for drainage which is opened when solenoid for hot water supply is closed is installed at a drainage pipe. CONSTITUTION:When a switch for automatic hot water supply is turned ON, solenoid valve 4 for hot water supply is opened and a drainage pipe 8 is closed at the same time and the hot water in the set temp. passes through the valve 4 and flows into a tank 6 and opens a check valve 7 by its water pressure and flows into a bathtub B through a hot water supply pipe 31. When a flow rate counter 1 detects a set flow rate, the solenoid valve 4 is closed and the bathtub is filled with the hot water of suitable temp. and amount. When hot water supply is finished as this, the pipe 8 is opened and air flows from an air charge valve 5 and the water in the tank 6 flows out through the valve 8. Accordingly, there is no hot water in the tank 6 and a bath system can be separated from waterworks even if the bathtub B is installed upstairs.

Description

[Detailed description of the invention] (a) Industrial application field This invention relates to a bath water heater, and more specifically, hot water heated by a gas water heater directly connected to the water supply is supplied to the bathtub via a hot water pouring pipe. Regarding the bath water heaters that we supply.

(b) Problems to be solved by conventional technology and inventions Conventional examples of this type of bath water heater are shown in FIGS. 4 to 7.

First, in FIGS. 4 and 5, Aa is an automatic hot water pouring water heater directly connected to the water supply, gas water heater C is installed on the first floor, and bathtub B is installed on the second floor.

In addition, in the gas water heater C, 1 is a flow counter switch, 2 is a heat exchanger, 10 is a gas valve, 11 is a burner,
3 is a hot water supply thermistor attached to the outlet of the heat exchanger 2.

Now, the hot water pouring pipe 3 that connects the gas water heater C and the lower part of the bathtub B.
1 includes, in order from upstream, a pouring solenoid valve 4, a vacuum breaker 5, a check valve (7, see Figure 5), and an air charge valve 9.
is intervening.

Thus, when the automatic pouring switch (not shown) is turned on,
The pouring electromagnetic valve 4 opens, tap water flows into the gas supply device C, and the flow rate counter switch 1 is turned on, at the same time the passing flow rate begins to be counted. At the same time, the gas valve 10 is opened, the burner 1 starts combustion, and the passing water is heated through the heat exchanger 2. The hot water supply thermistor 3 detects the temperature of the hot water at the outlet of the heat exchanger 2, and the gas valve 10 is adjusted based on the detected temperature to control the hot water temperature to a set temperature (for example, 42 to 45° C.). The hot water at the set temperature passes through the pouring electromagnetic valve 4 and the check valve 7, and flows into the bathtub B. By the way, bathtub B is installed on the second floor, so it is not possible to disconnect it from the water supply. It is necessary to place the edge of the bathtub B at least 30c+n lower than the breaker 5).

Next, in FIG. 7, the hot water heater Ab with an automatic bath function (water level detection type) is connected to the automatic hot water pouring water heater Aa in FIG. It is mainly constructed by adding a circulation piping 35 that circulates hot water.

In addition, 16 is another pouring solenoid valve, and 17 is a check valve.

The heating pipe line F includes a heating tank 23 and a heating circulation pipe 37.
The system includes a heating circulation pump 24 and a gas water heater connected to this piping. On the other hand, the circulation piping 35 includes, in order from upstream, a bath circulation pump 15, a bath thermistor 20,
A bath coil 19 and a check valve 18 are interposed.

Thus, when the automatic bath pump (not shown) is turned on,
The hot water pouring electromagnetic valves 4 and 16 open, and hot water at a predetermined temperature is supplied to the bathtub (not shown) as in the case of FIG. 4.

When a predetermined amount of hot water is poured in this way, the solenoid valves 4 and 16 are closed, the bath circulation pump 15 is activated, and the hot water in the bathtub fills the bath piping system, that is, the circulation piping 35, and the pressure is increased. The sensor 22 is brought into a state where the water level in the bathtub can be detected. Then, the hot water pouring solenoid valves 4 and 16 are opened again, and hot water is poured while detecting the water level in the bathtub with the pressure sensor 22. When the water level reaches the set level, the hot water pouring solenoid valve 4.16 is closed.

Next, the bath circulation pump 15 operates, and the bath thermistor 20
The water temperature in the bathtub is detected, and if the temperature is lower than the set temperature, the heating circulation pump 24 and gas water heater are activated.

However, in this hot water heater Ab, it is not preferable to install the bathtub on the second floor because it will cause a problem of cutting off the water supply. Normally, in such a case, downstream of the pouring solenoid valve 4,
A ball tag-type water supply edge cutting unit E equipped with a hot water storage tank 14, a ball 13, and a valve 12 as shown in FIG. ). However, this system has a large structure, and the bath circulation pump 1
Since there is a limit to the capacity (maximum head) of No. 5, the pouring capacity (flow rate) becomes small.

(C) Means for Solving the Problems and Their Effects This invention provides a bath water heater that supplies hot water heated by a gas water heater directly connected to the water supply to a bathtub via a hot water pouring pipe, in which the hot water pouring pipe is , a gas water heater is connected to the bathtub, and from the upstream, a hot water pouring pipe is provided with a solenoid valve for pouring hot water, a tank for disconnecting from the water supply, and a check valve, respectively, and a hot water pouring pipe that branches from the tank and has a hot water pouring pipe that is connected to the hot water pouring pipe, which has a solenoid valve for pouring hot water, a tank for disconnecting from the water supply, and a check valve, respectively. This bath water heater consists of a drain pipe with a drain solenoid valve that opens when the solenoid valve is closed.

That is, in this invention, a pouring solenoid valve and a specific tank are interposed in order from the upstream of the pouring pipe, and a specific drain pipe is branched from the tank, so that when the pouring solenoid valve is closed, the above-mentioned The drain pipe allows internal liquid to be discharged as air flows into the tank, thereby making it possible to disconnect from the water supply with a simple configuration.

(d) Examples The present invention will be described in detail below based on examples shown in the figures. Note that this invention is not limited to this.

Regarding the numbers in each figure, those having the same configuration as the conventional example are given the same numbers.

First, in Figures 1 and 2, an automatic bath water heater (mA) is connected to a gas water heater (C) and hot water heated by this gas water heater to a bathtub (B).
It mainly consists of a pouring pipe 30 that supplies molten metal to the lower part of the molten metal.

The hot water pouring pipe 30 connects the gas water heater C and the lower part of the bathtub B, and includes, in order from upstream, a hot water pouring solenoid valve 4, an air charge valve 5, a tank 6 for disconnecting from the water supply, and a check valve 7. It consists of an interposed pouring pipe 31 and a drain pipe 32 branching from the bottom of the tank 6 and having a drain electromagnetic valve 8 interposed therebetween.

The gas water heater C includes a pipe 29 directly connected to the water supply pipe 31, a flow rate counter switch 1, a heat exchanger 2, a gas valve 10, and a burner, which are connected to this pipe in order from upstream. 11, and a hot water supply thermistor 3 attached to the outlet of the heat exchanger 2.

Thus, when the automatic pouring switch (not shown) is turned on, the pouring solenoid valve 4 opens and the drain valve 8 closes, hot water at the set temperature passes through the pouring solenoid valve 4, flows into the tank 6, and is reversed by water pressure. The stop valve 7 is opened and the molten metal flows into the bathtub B via the pouring pipe 31. When the flow rate counter 1 detects the set flow rate, the hot water pouring electromagnetic valve 4 closes, and hot water at the appropriate temperature and amount is prepared in the bathtub B. When pouring is completed in this way, the drain valve 8 opens,
Air flows in from the air charge valve 5 and water in the tank 6 is drained out through the drain valve 8. In this way, there is no hot water in the tank 6, and even though the bathtub B is installed on the second floor, it is disconnected from the water supply. The structure of the tank 6 includes a discharge port 36 at the top, and the dimensions from the discharge port to the side wall and bottom surface are secured to be 25 mm or more.

Next, in FIG. 3, the automatic bath function (water level detection type) hot water heater A It is mainly constructed by adding a circulation piping 35 that circulates and supplies the supplied hot water to the heating tank 23. In addition, 16 is another 1
Two pouring electromagnetic valves, 17 are check valves.

The heating pipe line F includes a heating tank 23 and a heating circulation pipe 37.
The system includes a heating circulation pump 24 and a gas water heater connected to this piping. On the other hand, the circulation piping 35 includes, in order from upstream, a bath circulation pump 15, a bath thermistor 20,
A bath coil 19 and a check valve 18 are interposed. Note that 22 is a pressure sensor.

Thus, when the automatic bath pump (not shown) is turned on,
The hot water pouring electromagnetic valve 4.16 opens, and hot water at a predetermined temperature is supplied to the circulation piping 35 of the bathtub CB), as in the case of the drawing.

When a predetermined amount of hot water is poured in this way, the electromagnetic valve 4.16 is closed and the bath circulation pump 5 is activated, and the hot water in the bathtub fills the bath piping system, that is, the circulation piping 35, and the pressure is increased. The sensor 22 is brought into a state where the water level in the bathtub can be detected. Then, the hot water pouring electromagnetic valves 4 and 16 are opened again, and hot water is poured while detecting the water level in the bathtub with the pressure sensor 22. When the water level reaches the set level, the hot water pouring solenoid valves 4 and 16 are closed.

Next, the bath circulation pump 15 operates, and the bath thermistor 20
The water temperature in the bathtub is detected, and if the temperature is lower than the set temperature, the heating circulation pump 24 and gas water heater are activated.

As mentioned above, bath f! A suitable amount of warm water at the appropriate temperature is prepared in 'B. At this time, the drain valve 8 is opened, air flows in from the air charge valve 5, and the water in the tank 6 is discharged via the drain valve 8. Thus, there is no hot water in tank 6,
Even though bathtub B is installed on the second floor as shown in Figure 3, it is disconnected from the water supply.

(e) Effects of the invention According to this invention, the pouring solenoid valve, the pouring solenoid valve,
By interposing a specific tank and branching off a specific drain pipe from that tank, when the pouring solenoid valve is closed, the drain pipe drains the internal liquid as air flows into the tank. This makes it possible to disconnect from the water supply with a simple configuration.

[Brief explanation of drawings]

Fig. 2 is an explanatory diagram of the configuration showing one embodiment of the present invention, Fig. 2 is an enlarged explanatory diagram of its main part, Fig. 3 is a diagram equivalent to Fig. 1 showing another embodiment, and Fig. 4 is a diagram showing one embodiment of the invention. FIG. 5 is a diagram equivalent to FIG. 1 showing a conventional example, FIG. 5 is a diagram equivalent to FIG. 2 of the conventional example, FIG. 6 is a diagram equivalent to FIG. 1 showing another conventional example, and FIG. 7 is another one.
FIG. 2 is a configuration explanatory diagram of a water line cutting unit employed in two conventional examples. A: Automatic bath water heater, B: Bathtub,
C...Gas water heater, 4...Pouring solenoid valve, 5...Air charge valve, 6...Tank, 7... Check valve, 8...-Drain valve, 30...
Molten pouring pipe, 31... Molten pouring pipe, 32...
・・・－・Drain pipe.

Claims (1)

[Claims] 1. In a bath water heater that supplies hot water heated by a gas water heater directly connected to the water supply to a bathtub via a hot water supply pipe, the hot water supply pipe connects the gas water heater to the bathtub. , in order from the upstream: a pouring solenoid valve, a tank for disconnecting from the water supply, a pouring pipe with a check valve interposed therein, and branching from the tank;
A bath water heater comprising a drain pipe interposed with a drain solenoid valve that opens when the hot water pouring solenoid valve is closed.