JP2879781B2 - Bath water heater - Google Patents

Description

The present invention relates to a bath water heater, and more specifically, supplies hot water heated by a gas water heater directly connected to a water supply to a bathtub through a pouring line. Related to bath water heaters.

(B) Problems to be solved by the prior art and the invention FIGS. 4 to 7 show conventional examples of this type of bath water heater.

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

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, a pouring pipe connecting the gas water heater C and the lower part of the bathtub B
The pouring solenoid valve 4, the vacuum breaker 5, the check valve 7, (see FIG. 5) and the air charge valve 9 are connected to the 31 in order from the upstream.

Thus, when the automatic pouring switch (not shown) is turned on, the pouring solenoid valve 4 is opened, the tap water flows into the gas water heater C, the flow counter switch 1 is turned on, and the flow rate starts to be counted. At the same time, the gas valve 10 is opened, the burner 11 starts burning, and the passing water is heated via 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.).
Hot water at the set temperature passes through the pouring solenoid valve 4 and the check valve 7,
Flow into bathtub B. By the way, since the bathtub B is installed on the second floor, it cannot be cut off from the water supply, and in order to cut off the bathtub, the position of the bathtub needs to be arranged lower than the gas water heater C (specifically, vacuum Bathtub B from breaker 5
Must be placed at least 30 cm below the edge).

Next, in FIG. 7, with an automatic bath function (water level detection type)
The hot water supply heater Ab mainly includes a heating pipe F including a heating tank 23 and a circulation pipe 35 for circulating hot water supplied to the tank tub in addition to the automatic pouring water heater Aa in FIG. It is configured. 16 is another pouring solenoid valve, and 17 is a check valve.

The heating pipe F is provided with a heating tank 23 and a heating circulation pipe 37.
And a heating circulation pump 24 and a gas water heater D interposed between the pipes. On the other hand, a bath circulation pump 15, a bath thermistor 20, a bath coil 19, and a check valve 18 are sequentially connected to the circulation pipe 35 from the upstream.

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

Once the predetermined amount of molten metal is poured, the pouring solenoid valves 4 and 16 are closed once, the bath circulation pump 15 is operated, and the water in the bathtub fills the bath piping system, that is, the circulation piping 35, and the pressure sensor In step 22, the water level in the bathtub can be detected. Then, the pouring solenoid valves 4 and 16 are opened again and pouring is performed while detecting the water level in the bathtub with the pressure sensor 22. When the set water level is reached, the pouring solenoid valves are opened.
Close 4,16.

Next, the bath circulation pump 15 is operated, the temperature of the bathtub is detected by the bath thermistor 20, and if the temperature is lower than the set temperature, the heating circulation pump 24 and the gas water heater D are operated.

However, in this hot water supply / room heater Ab, it is not preferable to install the bathtub on the second floor because a problem of water supply margin occurs. Usually, in such a case, downstream of the pouring solenoid valve 4,
A water tap tank-type water edging unit E provided with a hot water storage tank 14, balls 13 and a valve 12 as shown in FIG. 6 is provided, and hot water in the hot water storage tank 14 is circulated by a bath circulation pump 15 through a circulation pipe 35 in a bathtub (not shown). I was leading to. However, this method has a large structure and the capacity (maximum head) of the bath circulation pump 15 is limited, so that the pouring capacity (flow rate) is reduced.

(C) Means for Solving the Problems and Action Thereof The present invention relates to a bath water heater for supplying hot water heated by a gas water heater directly connected to a water supply to a bathtub through a pouring line. , A gas water heater is connected to the bath, and from the upstream, in order from the upstream, a pouring solenoid valve, an air charge valve, a pouring pipe each interposed with a tank and a check valve for cutting off the edge of the water supply,
A drain pipe branched from the tank, the drain pipe further comprising a drain solenoid valve, and when the pouring solenoid valve is closed, the drain solenoid valve is opened to drain hot water in the tank into the drain pipe. And a bath water heater that simultaneously discharges air from the air charge valve into the tank.

That is, the present invention interposes a solenoid valve, an air charge valve, a tank for cutting off the water and a check valve in order from the upstream of the pouring pipe, and branches a specific drain pipe from the tank. When the pouring solenoid valve is closed, the drain pipe enables the discharge of the internal liquid with the inflow of air into the tank, thereby enabling a simple configuration to be separated from the water supply. .

(D) Embodiment The present invention will be described in detail below based on an embodiment shown in the drawings.
The present invention is not limited by this. Regarding the numbers in the respective drawings, the same components as those in the conventional example are denoted by the same numbers.

First, in FIG. 1 and FIG. 2, an automatic bath water heater A ₀ includes a gas water heater C and a hot tub B
And a pouring line 30 for supplying to the lower part of the tank.

The pouring line 30 connects the gas water heater C and the lower part of the bathtub B. The pouring solenoid valve 4, the air charge valve 5, the tank 6 for cutting off the edge of the tap water and the check valve 7 are arranged in order from the upstream. It comprises a pouring pipe 31 interposed and a drain pipe 32 branched from the bottom of the tank 6 and interposed with the drain solenoid valve 8.

The gas water heater C includes a pipe 29 directly connected to the water supply pipe connected to the pouring pipe 31, a flow counter switch 1 and a heat exchanger 2 which are sequentially connected to the pipe from the upstream, and a gas valve 1
0, a burner 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 is opened and the drain valve 8 is closed, and the hot water of the set temperature passes through the pouring solenoid valve 4, flows into the tank 6, and reverses by the water pressure. The stop valve 7 is opened and flows into the bathtub B via the pouring pipe 31. When the flow counter 1 detects the set flow rate,
The pouring solenoid valve 4 is closed, and the bathtub B is prepared with a suitable temperature and a suitable amount of hot water. 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 flows out through the drain valve 8. In this way, the tank 6 is depleted of hot water, and the bathtub B is cut off from the water supply even if it is installed on the second floor. The structure of the tank 6 has a discharge port 36 in the upper part, and the dimension from the discharge port to the side wall and the bottom surface is secured to 25 mm or more.

Next, in FIG. 3, with an automatic bath function (water level detection type)
Hot-water heating units A ₁ is the automatic pouring water heater A ₀ of FIG. 1, the heating conduit F and piping 35 for circulation supplying circulating hot water supplied to the tub B to the heating tank 23 containing a heating tank 23 Are mainly added. 16 is another pouring solenoid valve, and 17 is a valley valve.

The heating pipe F is provided with a heating tank 23 and a heating circulation pipe 37.
And a heating circulation pump 24 and a gas water heater D interposed between the pipes. On the other hand, a bath circulation pump 15, a bath thermistor 20, a bath coil 19, and a check valve 18 are sequentially connected to the circulation pipe 35 from the upstream. Reference numeral 22 denotes a pressure sensor.

Thus, when the automatic bath pump (not shown) is turned on, the pouring solenoid valves 4 and 16 are opened, and hot water of a predetermined temperature is supplied to the circulation pipe 35 of the bathtub (B) as in the case of FIG.

Once the predetermined amount of molten metal is poured, the pouring solenoid valves 4 and 16 are closed once, the bath circulation pump 15 is operated, and the water in the bathtub fills the bath piping system, that is, the circulation piping 35, and the pressure sensor In step 22, the water level in the bathtub can be detected. Then, the pouring solenoid valves 4 and 16 are opened again and pouring is performed while detecting the water level in the bathtub with the pressure sensor 22. When the set water level is reached, the pouring solenoid valves are opened.
Close 4,16.

Next, the bath circulation pump 15 is operated, the temperature of the bathtub is detected by the bath thermistor 20, and if the temperature is lower than the set temperature, the heating circulation pump 24 and the gas water heater D are operated.

As described above, an appropriate temperature and an appropriate amount of hot water are prepared in the bathtub B. At this time, the drain valve 8 is opened and the air charge valve 5 is opened.
And the water in the tank 6 is discharged through the drain valve 8. Thus, there is no hot water in the tank 6, and the bathtub B is cut off from the water supply even if it is installed on the second floor as shown in FIG.

(E) Effects of the Invention According to the present invention, a pouring solenoid valve, an air charge valve, a tank for disconnecting from the water supply, and a check valve are interposed in order from the upstream of the pouring pipe, and the tank is specified from the tank. When the pouring solenoid valve is closed by branching the drain pipe, the drain pipe enables the internal liquid to be discharged with the inflow of air into the tank. This allows for trimming.

[Brief description of the drawings]

FIG. 1 is an explanatory view of a configuration showing an embodiment of the present invention, FIG. 2 is an explanatory view of an enlarged configuration of a main part thereof, FIG. 3 is a diagram corresponding to FIG. 1 showing another embodiment, and FIG. FIG. 1 is a diagram corresponding to FIG. 1 showing a conventional example, FIG. 5 is a diagram corresponding to FIG. 2 of the conventional example, FIG. 6 is a diagram corresponding to FIG. 1 showing another conventional example, and FIG.
FIG. 7 is an explanatory diagram of a configuration of a water supply edge 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… Pour pipe, 31… Pour pipe, 32… Drain pipe.

Continued on the front page (72) Inventor Nori Matsumura 3-201 Minamiyoshikata, Tottori City, Tottori Prefecture Inside Tottori Sanyo Electric Co., Ltd. (72) Inventor Kiyoshi Kishimoto 3-201 Minamiyoshikata, Tottori City, Tottori Sanyo Tottori Inside (72) Inventor Yoshiji Nagasaka 4-1-2 Hirano-cho, Chuo-ku, Osaka-shi, Osaka Inside Osaka Gas Co., Ltd. (72) Inventor Hitoshi Yamamoto 4-1-2, Hirano-cho, Chuo-ku, Osaka, Osaka No. Osaka Gas Co., Ltd. (56) References Japanese Utility Model Showa 61-119063 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) F24H 1/00 606

Claims (1)

(57) [Claims] 1. A bath water heater for supplying hot water heated by a gas water heater directly connected to a water supply to a bathtub through a pouring line, wherein the pouring line connects the gas water heater to the bathtub, and In this order, a pouring solenoid valve, an air charge valve, a pouring pipe interposed with a tank and a check valve for cutting off the edge of the water supply, and a drain pipe branched from the tank, and the drain pipe is a drain electromagnetic valve Further comprising a valve, wherein when the pouring solenoid valve is closed, the drain solenoid valve is opened to discharge hot water in the tank through the drain pipe, and at the same time, air from the air charge valve to the tank. Bath water heater to let in.