JP2002206810A - Automatic hot water supply apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic hot water supply apparatus which has high responsiveness to changes in hot water supply temperature and can prevent the detouring of hot water to a hot water flow passage or a water flow passage through an automatic mixing valve for tap. SOLUTION: This automatic hot water supply apparatus is provided with first and second hot water delivery paths 2 and 3 respectively having automatic mixing valves which mix hot water from the hot water flow passage 5 with water from the water flow passage 6. In the apparatus, a mixing valve 8 for tap installed to the first hot water delivery path 2 is constituted of the automatic mixing valve equipped with a temperature-sensitive elongating and contracting body 22a and check valves 28 and 29 are respectively installed to the hot water and water flow passages 5 and 6 of the mixing valve 8.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a hot water supply to a bath or a kitchen with a first hot water path and a second hot water path each having mixing means for mixing hot and cold water from a hot water flow path. The present invention relates to an automatic water heater.

[0002]

2. Description of the Related Art FIG. 5 is a block diagram showing a configuration of a conventional automatic hot water supply apparatus, and FIG. 6 is a configuration diagram of a proportional automatic mixing valve. In the figure, reference numeral 1 denotes an automatic hot water supply apparatus, which includes a first hot water path 2, a second hot water path 3, and a control unit 4. Then, one side of the first hot water path 2 and the second hot water path 3 is connected to a hot water flow path 5 for sending hot water to the automatic hot water supply device 1 and a water flow path 6 for sending water, respectively. The other side of the path 3 is connected to a bathtub 15 described later, and the other side of the first tapping path 2 is connected to a faucet 17 described later.

A second tapping path 3 is provided downstream of the automatic bath mixing valve 7 for mixing the hot water from the hot water path 5 and the water from the water flow path 6, and the amount of hot water flowing through the tapping path 3, that is, A flow rate sensor 9 for detecting the amount of hot water supplied to the bath, a pouring opening / closing valve 10 provided downstream of the flow rate sensor 9 for opening and closing the tapping path 3;
A temperature sensor 11 is provided downstream of the pouring valve 10 and detects the temperature of hot water flowing through the second tapping path 3, that is, the filling temperature (hot water supply temperature). Further, the first tapping path 2 is provided with a faucet automatic mixing valve 8 for mixing the hot water from the hot water flow path 5 and the water from the water flow path 6, and is provided on the downstream side thereof.
A flow sensor 12 for detecting the presence or absence of hot water from the bath 7; and a temperature sensor 13 provided upstream of the flow sensor 12 for detecting the temperature of hot water flowing through the hot water path 2, that is, the temperature of hot water supplied to the faucet 17. I have.

[0004] The bathtub 15 has a bathtub adapter 16 connected to a bath pipe 14, and the bathtub adapter 16 is connected to the second tapping path 3 via the bath pipe 14. Further, the faucet 17 is connected to the first tapping path 2 via a water pipe.

The control unit 4 includes a flow sensor 9 and a temperature sensor 1
1, 13; a flow sensor 12, a bath automatic mixing valve 7, a pouring on / off valve 10, and a faucet mixing valve 8; 18 is electrically connected to the remote controller 18. The remote controller 18 sets the hot water temperature of the bathtub 15 and the hot water supply temperature to the faucet 17, respectively. The bath automatic mixing valve 7 is controlled based on the set value by 18 and the detection result of the temperature sensor 11, and the bathtub 15 is filled with the set bathing temperature.

Here, the bath automatic mixing valve 7 and the faucet automatic mixing valve 8 are generally constituted by proportional automatic mixing valves as shown in FIG. The proportional type automatic mixing valve has a valve shaft 2 having a valve driving motor 21 as an adjusting means at one end.
The valve body 20 attached to the valve body 2 is incorporated in the valve body 19, and the hot water from the hot water outlet 23 and the water from the water outlet 24 are mixed at the position of the valve body 20, and the amount of hot water is supplied to the hot water outlet 25. I do. Then, for example, hot water from the faucet 17 is
When the hot water supply temperature is set to the predetermined value, the valve body 20 attached to the valve shaft 22 is moved up and down by the valve driving motor 21 of the faucet automatic mixing valve 8 so that the hot water from the hot water outlet 23 and the hot water The hot water supply temperature is set by changing the mixing ratio with the water from 24.

In the conventional automatic water heater 1 configured as described above, for example, when filling the bathtub 15 with hot water,
First, when the hot water filling temperature is set by the remote controller 18 and the hot water filling operation is performed, the control section 4 mixes the hot water from the hot water flow path 5 with the water from the hot water flow path 6 using the bath automatic mixing valve 7. Then, the pouring on / off valve 10 is opened to flow the mixed hot water into the second tapping path 3. Next, based on the temperature of the mixed hot water detected by the temperature sensor 11, the automatic mixing valve 7 for the bath is controlled so that the mixing ratio of the hot water and the water becomes the set hot water temperature, and the bath piping 1
The hot water is supplied from the bathtub adapter 16 to the bathtub 15 through the bath 4.
When a predetermined amount of hot water is supplied into the bathtub 15 based on the detection result of the flow rate sensor 9, the pouring on-off valve 1
Close 0 and complete the filling.

When hot water is supplied from the faucet 17,
When the faucet 17 is opened and the flow sensor 12 detects hot water from the faucet 17, the control unit 4 mixes the hot water from the hot water flow path 5 and the water from the water flow path 6 with the automatic mixing valve 8 for faucet. The mixed hot water flows through the first tapping path 2. Next, based on the hot water supply temperature detected by the temperature sensor 13, the faucet automatic mixing valve 8 is adjusted so that the mixing ratio of hot water and water becomes the set hot water supply temperature.
And hot water is supplied from the faucet 17 via the water pipe.

In a hot water supply apparatus using a proportional automatic mixing valve, when the hot water is not supplied, both the automatic mixing valve 7 for bath and the automatic mixing valve 8 for faucet are provided with the hot water outlet 2.
3 or the valve body 2 at the position where either the water outlet 24 is closed.
0 is stopped. For example, when the filling of the bathtub 17 is started, if the valve body 20 of the faucet automatic mixing valve 8 is located at an intermediate position between the hot water outlet 23 and the water outlet 24, the dotted arrow A in FIG. As shown, when the pressure of the water is higher than the hot water via the faucet automatic mixing valve 8, the water flows into the hot water flow path 5 of the bath automatic mixing valve 7, and from the hot water flow path 5 of the bath automatic mixing valve 7. This is because the temperature of the hot water drops, the control cannot be performed at the original position of the valve body 20, and the hot water temperature in the bathtub 15 drops, and the temperature may not reach the set temperature.

[0010]

In the conventional automatic hot water supply apparatus 1 as described above, since both the automatic mixing valve 7 for bath and the automatic mixing valve 8 for faucet are constituted by proportional automatic mixing valves. The hot water temperature cannot be changed at a speed higher than the drive speed of the valve drive motor 21 of the mixing valve, and the response performance is insufficient with respect to hot water supplied to the general faucet 17 which requires responsiveness to the hot water temperature change. There was a problem. Therefore, it has been previously proposed to use only the faucet automatic mixing valve 8 which has good responsiveness, for example, an automatic mixing valve provided with a temperature-sensitive expansion / contraction body 22a having a structure shown in FIG. However, the automatic mixing valve having the temperature-sensitive type elastic body 22a drives the valve body 20 and the elastic body 22a by the valve driving motor 21 due to its structure. The water outlet 23 and the water outlet 24 are automatically opened and closed due to expansion and contraction, and the water outlet 23 or the water outlet 24 cannot be closed by the valve driving motor 21. When the hot water is higher than the hot water in the faucet automatic mixing valve 8 when the hot water is supplied to the bathtub 17 when the hot water is not supplied from the general faucet and the hot water is not supplied from the general faucet. Figure 5
As shown by the dotted arrow A therein, water flows into the hot water flow path 5 of the bath automatic mixing valve 7, the temperature of the hot water from the hot water flow path 5 of the bath automatic mixing valve 7 decreases, and the hot water flows into the bathtub 15. The phenomenon that the tension temperature is lowered occurs. Conversely, when the pressure of the hot water is higher than that of the water, the hot water flows into the water flow path 6 of the automatic mixing valve 7 for the bath, and as a result, the temperature of the mixed hot water discharged from the second hot water path 3 increases. Problems arise.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and has a good response performance to a change in hot water supply temperature and a hot water flow path or a water flow path through an automatic mixing valve for a faucet. It is an object of the present invention to provide an automatic hot water supply device in which hot water is prevented from flowing around.

[0012]

SUMMARY OF THE INVENTION An automatic hot water supply apparatus according to the present invention comprises a first hot water path and a second hot water path each having a hot water flow path and a mixing means for mixing hot and cold water from the water flow path. A temperature detecting unit provided in each of the first and second tapping paths, for detecting a temperature of each tapping path, and a control unit for controlling a mixing unit of each tapping path based on a detection result of the temperature detecting means. The mixing means of the first tapping path is constituted by an automatic mixing valve provided with a temperature-sensitive elastic body and an adjusting means for adjusting the position of the elastic body for changing the mixing ratio of hot and cold water. The mixing means of the second tapping path is constituted by a proportional automatic mixing valve in which the adjusting means for adjusting the position of the valve element changes the mixing ratio of hot water and the hot water path and the water flow path of the first tapping path. Are provided with backflow prevention means.

Further, the automatic hot water supply apparatus according to the present invention has a first
Is connected to a general faucet, and the second hot water path is connected to a bathtub.

Further, the automatic hot water supply apparatus according to the present invention comprises a first hot water path and a second hot water path each having a hot water flow path and a mixing means for mixing hot water from the water flow path, and the first and second hot water flow paths. Each provided with a tapping path, a temperature detecting means for detecting the temperature of each tapping path, and a control unit for controlling the mixing means of each tapping path based on the detection result of each temperature detecting means, The mixing means comprises an automatic mixing valve in which a temperature-sensitive elastic body and an adjusting means for adjusting the position of the elastic body are provided for changing a mixing ratio of hot and cold water, and
And a backflow prevention means provided in each of the hot water flow path and the water flow path of the second hot water supply path.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a configuration diagram of an automatic hot water supply apparatus according to Embodiment 1 of the present invention, and FIG. 2 is a control block diagram thereof. The same parts as those in the conventional example are denoted by the same reference numerals, and description thereof will be omitted. In FIG. 1, 8
a is a faucet mixing valve comprising an automatic mixing valve having a temperature-sensitive expansion / contraction body, and 28 and 29 are non-return check valves provided in the hot water flow path 5 and the water flow path 6 of the faucet mixing valve 8a, respectively. A valve and a check valve for the water flow path.

FIG. 3 is a view showing the structure of an automatic mixing valve provided with the above-mentioned temperature-sensitive type expansion / contraction body. Reference numeral 19 denotes a mixing valve main body, which is a valve body 20, a temperature-sensitive type expansion / contraction body 22a, a spring 26, and a spring. Press 2
7 is built in. The valve body 20 and the temperature-sensitive type elastic body 22a are connected, and the valve body 20 and the temperature-sensitive type elastic body 22a are vertically moved by the valve driving motor 21 so that the mixed hot water temperature set by the remote controller 18 is obtained. Adjust. The telescopic body 22a automatically expands and contracts according to the hot water temperature, the hot water temperature, the hot water amount and the water amount from the adjusted position, moves the valve body 20, and changes the mixing ratio of the hot water from the hot water outlet 23 and the water from the hot water outlet 24. Maintain the temperature of the mixed hot water set by this.

After adjusting the valve body 20 and the temperature-sensitive expansion / contraction body 22a to predetermined positions, when the hot water temperature is higher than the set temperature, the expansion / contraction body 22a automatically and instantaneously extends, and the valve body 20 is lowered.
The opening area of the hot water outlet 23 decreases and the amount of hot water decreases, and conversely, the opening area of the water outlet 24 increases and the amount of water increases,
The temperature of the mixed hot water is adjusted low. When the temperature of the mixed hot water is lower than the set temperature, the expansion / contraction body 22a automatically and instantaneously shrinks, the valve body 20 rises, the opening area of the hot water outlet 23 increases, and the amount of hot water increases. The opening area of the water outlet 24 is reduced, the amount of water is reduced, and the temperature of the mixed hot water is adjusted to be high. As described above, after the valve body 20 is adjusted by the valve driving motor 21 to near the set temperature, the temperature is automatically adjusted by the expansion and contraction of the thermosensitive expansion and contraction body 22a. Even when the water temperature and flow rate from the port 24 change, the hot water supply response is better than that of the proportional automatic mixing valve that directly drives the valve element 20.

On the other hand, in the automatic mixing valve provided with the temperature-sensitive expansion / contraction body 22a, the valve body 20 and the expansion / contraction body 22a are driven by the valve driving motor 21 as described above. Hot water outlet 23, water outlet 2 automatically by expansion and contraction of body 22a
4, the water outlet 23 or the water outlet 24 cannot be closed by the valve driving motor 21.
Is located at an intermediate position between the hot water outlet 23 and the water outlet 24, but in the first embodiment, since the hot water flow path check valve 28 is provided in the hot water flow path 5 of the faucet mixing valve 8, When the pressure of the water is high, water is prevented from flowing into the hot water flow path 5 of the bath mixing valve 7, and the temperature of the hot water in the hot water flow path 5 of the bath mixing valve 7 does not drop. . On the other hand, the water flow path 6 of the mixing valve 8 for faucet
Is provided with a check valve 29 for a water flow path, so that even when the pressure of the hot water is higher than that of the water, the hot water is prevented from flowing into the water flow path 6 of the mixing valve 7 for the bath. The temperature of the water in the water flow path 6 does not rise.

As described above, the faucet mixing valve 8 is an automatic mixing valve provided with the temperature-sensitive expansion / contraction body 22a, and the hot water flow path 5 and the water flow path 6 of the first tapping path 2 having this automatic mixing valve. Are provided with check valves 28 and 29, respectively, so as to improve the hot water supply response of the general faucet water supply, while flowing the hot water from the hot water flow path 5 and the water from the water flow path 6 via the faucet mixing valve 8. Can be prevented and the hot water supply temperature of the bath can be controlled stably.

Embodiment 2 Next, Embodiment 2 of the present invention
Will be described with reference to FIG. FIG. 4 is a configuration diagram of an automatic hot water supply apparatus according to Embodiment 2 of the present invention. In the first embodiment, only the faucet mixing valve 8 is an automatic mixing valve provided with the temperature-sensitive expansion / contraction body 22a, and the bath automatic mixing valve 7 is a proportional automatic mixing valve. In the second embodiment, both the automatic mixing valve for bath 7 and the automatic mixing valve for faucet 8 are constituted by automatic mixing valves provided with a temperature-sensitive elastic body 22a, and the first tapping path 2 having these automatic mixing valves is provided. Check valves 28 and 2 respectively in the hot water flow path 5 and the water flow path 6 of the second hot water path 3.
9, 30, 31 are provided. By doing this,
It is possible to prevent hot water from flowing from the hot water flow path 5 and water from the water flow path 6 through both automatic mixing valves, while improving the hot water supply response of both the general faucet hot water supply and the bath hot water supply. Can be controlled stably.

[0021]

As described above, the automatic hot water supply apparatus according to the present invention comprises a first tapping channel and a second tapping channel each having mixing means for mixing hot and cold water from the hot water channel and the water channel. A temperature detecting unit provided in each of the first and second tapping paths, for detecting a temperature of each tapping path, and a control unit for controlling a mixing unit of each tapping path based on a detection result of the temperature detecting means. Wherein the mixing means of the first tapping path comprises a thermo-sensitive telescopic body and an adjusting means for adjusting the position of the telescopic body comprises an automatic mixing valve provided to change the mixing ratio of hot and cold water. The mixing means of the second tapping path is constituted by a proportional mixing valve in which the adjusting means for adjusting the position of the valve element changes the mixing ratio of hot water and the hot water path and the water flow path of the first tapping path. Are provided with backflow prevention means, so that the responsiveness of the first hot water path can be improved while the first Tapping channel hot flow path, prevents hot water wraparound from water flow path, a second hot-water supply temperature can provide an automatic hot water supply apparatus can be stably controlled.

Further, the automatic hot water supply apparatus according to the present invention has a first
Is connected to a common tap, and the second tap is connected to a bathtub, so that it is possible to provide an automatic hot water supply apparatus with improved hot water supply response of the common tap.

Further, the automatic hot water supply apparatus according to the present invention comprises:
A first tapping path and a second tapping path each having mixing means for mixing the tap water from the tapping water path and the tapping water path, and a first tapping path and a second tapping path, respectively, which are provided in the first tapping path and the second tapping path, respectively. Temperature detecting means for detecting, and a control unit for controlling the mixing means of the respective tapping paths based on the detection results of the respective temperature detecting means, wherein the mixing means comprises a temperature-sensitive elastic body, The adjusting means for adjusting the position of the body comprises an automatic mixing valve provided to change the mixing ratio of hot and cold water, and prevents backflow into each of the hot water flow path and the water flow path of the first and second tapping paths. By providing the means, the hot water from the hot water flow path 5 and the water from the water flow path 6 are circulated through both automatic mixing valves while improving the hot water supply response of both the general faucet hot water supply and the bath hot water filling. Can be prevented, and the hot water supply temperature can be controlled stably.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an automatic hot water supply apparatus according to Embodiment 1 of the present invention.

FIG. 2 is a control block diagram of the automatic hot water supply apparatus of FIG.

FIG. 3 is a configuration diagram of an automatic mixing valve provided with a temperature-sensitive elastic body.

FIG. 4 is a configuration diagram of an automatic hot water supply apparatus according to Embodiment 2 of the present invention.

FIG. 5 is a configuration diagram showing a conventional automatic hot water supply apparatus.

FIG. 6 is a configuration diagram of a proportional automatic mixing valve.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Automatic hot water supply apparatus, 2 1st hot water path, 3rd hot water path, 4 control part, 5 hot water flow path, 6 water flow path, 7 Automatic mixing valve for bath, 8 Automatic mixing valve for faucet, 11, 13 Temperature Sensor, 15 bathtub, 17 faucet, 19 mixing valve body, 2
0 valve body, 21 valve drive motor (adjustment means), 22a
Telescopic body, 23 hot water outlet, 24 hot water outlet, 25 hot water outlet, 28-31 check valve.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takashi Saito 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsui Electric Co., Ltd. (72) Inventor Masaaki Furuuchi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F term in Ryo Denki Co., Ltd. (reference) 3H106 DA05 DC02 DC18 EE04 EE08 KK06 KK33 KK34 3L036 AC25 AC27

Claims (3)

[Claims] 1. A first hot water path and a second hot water path each having mixing means for mixing hot water from a hot water flow path and a water flow path, and provided in the first and second hot water paths, respectively. A temperature detecting means for detecting a temperature of the hot water path, and a control section for controlling a mixing means of each hot water path based on a detection result of each temperature detecting means, and a mixing means for the first hot water path. Comprises an automatic mixing valve provided with a temperature-sensitive elastic body and adjusting means for adjusting the position of the elastic body for changing the mixing ratio of hot and cold water, and the mixing means of the second tapping path is a valve body. The adjusting means for adjusting the position of the hot water is constituted by a proportional automatic mixing valve for changing the mixing ratio of hot and cold water, and backflow preventing means is provided in each of the hot water flow path and the water flow path of the first tapping path. Automatic water heater. 2. A first tapping path is connected to a common tap, and
2. The automatic hot water supply apparatus according to claim 1, wherein the hot water supply path is connected to a bathtub. 3. A first tapping channel and a second tapping channel each having mixing means for mixing hot water from the hot water channel and the water channel, and provided in the first and second tapping channels, respectively. Temperature detecting means for detecting the temperature of the hot water path, and a control unit for controlling the mixing means of each hot water path based on the detection result of each temperature detecting means, wherein the mixing means is a temperature-sensitive type. The telescopic body and the adjusting means for adjusting the position of the telescopic body are constituted by an automatic mixing valve provided to change the mixing ratio of the hot and cold water, and the hot water flow path and the water flow of the first and second tapping paths are provided. An automatic hot-water supply device characterized in that a backflow preventing means is provided in each of the roads.