JP2002130805A - Automatic water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an automatic water heater capable of meeting hot water supply as required with good responding performance at low cost. SOLUTION: The automatic water heater comprises first and second hot water output passages 2 and 8 having mixing means 3 and 9 for mixing hot water and water, temperature sensing means 7 and 11 of the passages 2 and 8, and a controller 12 for controlling the means 3 and 9 based on sensed results of the means 7 and 11. In this case, the first passage 2 is connected to a bathtub 14 side, and the second passage 8 is connected to a general faucet 16 side. The heater further comprises a flow regulating means 6 for regulating the flow rate of the first passage 2. The controller 12 controls the means 6 when the hot water is simultaneously supplied from the first and second passages 2 and 8 to set the flow rate of the first passage 2 to a predetermined rate or less.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic water heater for supplying water to a bath or a kitchen.

[0002]

2. Description of the Related Art FIG. 6 is a schematic view showing a configuration of a conventional automatic hot water supply apparatus, FIG. 7 is a block diagram of a main part thereof, and FIG. 8 is a configuration view of a mixing valve of the automatic hot water supply apparatus. 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 8 and a control unit 12. Then, one side of the first hot water path 2 and the second hot water path 8 is connected to a water flow path 17 for sending water to the automatic hot water supply device 1 and a hot water flow path 18 for sending hot water to the first hot water supply path 1. The other side of the tapping path 2 is connected to a bathtub 14 described later, and the other side of the second tapping path 8 is connected to a faucet 16 described later.
It is connected to the.

[0003] The first tapping path 2 is provided with a mixing valve 3 for bath water filling which mixes water from the water flow path 17 and hot water from the hot water flow path 18.
And a flow sensor 4 provided downstream thereof for detecting the amount of hot water flowing through the first hot water path 2, that is, bath bath filling amount, and pouring water provided downstream of the flow sensor 4 for opening and closing the first hot water path 2. An on-off valve 5 and a temperature sensor 7 that is provided downstream of the pouring on-off valve 5 and detects the temperature of hot water flowing through the first tapping path 2, that is, the filling temperature (hot water supply temperature). In addition, the second tapping channel 8 is provided with water from the water channel 17 and the hot water channel 1.
A mixing valve 9 for a general faucet for mixing the hot water from the tap 8, a flow sensor 10 provided downstream thereof for detecting the presence or absence of hot water from a faucet 16, and a second valve provided downstream of the flow sensor 10.
And a temperature sensor 11 for detecting the temperature of hot water flowing through the hot water supply passage 8, that is, the temperature of hot water supplied to the faucet 16.

The bathtub 14 has a bathtub adapter 15 connected to a bath pipe, and the bathtub adapter 15 is connected to the first tapping channel 2 via the bath pipe. Further, the faucet 16 is connected to the second tapping path 8 via a water pipe.

As shown in FIG. 7, the control unit 12 includes a flow sensor 4, temperature sensors 7, 11, a flow sensor 10, a bath water filling mixing valve 3, a pouring on-off valve 5, and a general faucet mixing valve 9, In addition to being electrically connected, it is also electrically connected to an operation unit 13 provided, for example, indoors, remote from the automatic water heater 1, and the operation unit 13 fills the bathtub 14 with the hot water and the faucet 16 with the hot water. Are set, for example, when the operation of starting the filling of the bathtub 14 is performed, the control unit 12
Controls the bath filling valve 3 on the basis of the set value by the operation unit 13 and the detection result of the temperature sensor 7, and fills the bathtub 14 with the set filling temperature.

Further, the mixing valve 3 for bath water filling and the mixing valve 9 for general faucet are proportional type mixing valves, and are attached to a valve shaft 19 having a valve driving motor 20 at one end as shown in FIG. The movable valve element 18 is housed in the mixing valve body 17. For example, when the hot water from the faucet 16 is set to the hot water supply temperature set in the operation unit 13, the mixing valve 9 for a general faucet is used.
The movable valve element 18 and the valve shaft 19 are
Is moved up and down to change the mixing ratio of the hot water flow path 18 and the water flow path 17 to the set hot water supply temperature.

In the automatic hot water supply apparatus configured as described above, for example, when filling the bathtub 14, first, the operation section 13 sets the filling temperature and performs the operation of starting filling, the control section 12 starts the filling operation. , Mixing valve 3 for bath water filling, hot water flow path 18
The hot water from the water flow path 17 and the water are mixed, and at the same time, the pouring on / off valve 5 is opened to flow the mixed hot water into the first tapping path 2. Next, based on the temperature of the mixed hot water detected by the temperature sensor 7, the bath hot water mixing valve 3 is controlled so that the mixing ratio of hot water and water becomes the set hot water temperature, and the bathtub adapter is connected via the bath piping. Hot water is supplied to bathtub 14 from 15. Then, when a predetermined amount of hot water is supplied into the bathtub 14 based on the detection result of the flow rate sensor 4, the pouring on / off valve 5 is closed to complete the filling.

When hot water is supplied from the faucet 16,
When the faucet 16 is opened and the flow sensor 10 detects the tapping of the faucet 16, the control unit 12 controls the general faucet mixing valve 9.
To mix the hot water from the hot water flow path 18 and the water flow path 17 with the water, and to flow the mixed hot water into the second hot water supply path 8. Then, based on the hot water supply temperature detected by the temperature sensor 11, the general faucet mixing valve 9 is controlled 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 16 via the water pipe.

Further, when hot water is supplied to the bathtub 14 and hot water is supplied from the faucet 16 simultaneously, for example, when hot water is supplied from the faucet 16 at the hot water temperature set by the operation unit 13, the control unit 12 The hot water is supplied while maintaining the movable valve body 18 of the general faucet mixing valve 9 at a position corresponding to the set hot water supply temperature so that hot water is supplied from the faucet 16 as before. Then, when hot water is supplied to the bathtub 14, particularly when hot water is supplied to the bathtub 14, the control unit 12 adjusts the movable valve element 18 of the bath hot water mixing valve 3 to fully open the hot water flow path 18 side. At the same time, the water flow path 17 side is fully closed, and a large amount of hot water flows into the first hot water path 2. At this time, if the movable valve element 18 of the general faucet mixing valve 9 remains at the same position, the amount of hot water from the hot water flow path 18 decreases and the temperature of hot water supplied from the faucet 16 decreases.
2 controls the general faucet mixing valve 9 to increase the amount of hot water by increasing the opening area of the hot water flow path 18,
The opening area is reduced to reduce the amount of water, so that hot water can be supplied at the set hot water supply temperature.

In addition, when hot water is supplied to the bathtub 14 and hot water is supplied from the faucet 16 at the same time, when the hot water supply to the bathtub 14 is stopped, particularly when the high-temperature hot water supply to the bathtub 14 is stopped, the above-mentioned high-temperature hot water supply is performed. Performs the reverse operation. In other words, when the high-temperature hot water supply is stopped, the amount of hot water from the hot water flow path 18 increases and the hot water supply temperature rises while the movable valve element 18 of the general faucet mixing valve 9 remains at the same position. The valve 9 is controlled to reduce the amount of hot water by reducing the opening area of the hot water flow path 18 and increase the amount of water by increasing the opening area of the water flow path 17 so that hot water can be supplied at the set hot water supply temperature.

[0011]

In the conventional automatic water heater 1 as described above, since both the mixing valve 3 for bath water filling and the mixing valve 9 for general faucet are proportional mixing valves, the bathtub 1 is provided.
In the case where the hot water filling temperature to hot water 4 and the hot water supply temperature from faucet 16 are changed during hot water supply, or when hot water is supplied to bathtub 14 and faucet 16 at the same time, first hot water supply path 2 and second hot water supply path 2 are provided.
Of the hot water flow path 18 and the water flow rate of the water flow path 17 in the hot water supply path 8, the hot water cannot be supplied at the temporarily set hot water temperature and hot water supply temperature, and the response performance is insufficient. was there. Therefore, it is conceivable to use a mixing valve having good responsiveness, but there is a problem that the cost is increased.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide an automatic hot water supply apparatus which has good response performance, can cope with required hot water supply, and is inexpensive. It is.

[0013]

SUMMARY OF THE INVENTION An automatic hot water supply apparatus according to the present invention includes a first tapping channel and a second tapping channel each having mixing means for mixing hot and cold water from a hot water channel and a first hot water channel. And a temperature detection means for detecting the temperature of each hot water path, and a control unit for controlling the mixing means for each hot water path based on the detection result of each temperature detection means. The first tapping path is connected to the bathtub side, the second tapping path is connected to the general faucet side, and the first tapping path is provided with flow rate adjusting means for adjusting the flow rate of the first tapping path. The control unit controls the flow rate adjusting means to simultaneously reduce the flow rate of the first hot water supply path to a predetermined amount or less at the time of simultaneous hot water supply from the first and second hot water supply paths.

[0014] In the automatic hot water supply apparatus according to the present invention, the control unit includes:
At the time of simultaneous hot water supply from the first and second hot water outlets, the flow rate adjusting means is controlled based on the hot water supply temperature set from the first hot water outlet to reduce the flow rate of the first hot water outlet to a predetermined amount or less. is there.

In the automatic hot water supply apparatus according to the present invention, the control unit includes:
At the time of simultaneous hot water supply from the first and second hot water outlets, if the temperature difference between the set hot water supply temperatures from each hot water outlet is equal to or greater than a predetermined value, the flow rate adjusting means is controlled to control the flow rate of the first hot water outlet. It should be below the fixed amount.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a schematic diagram showing a configuration of an embodiment of the present invention, and FIG. 2 is a block diagram of a main part thereof. The same parts as those of the conventional example described with reference to FIGS. 6 to 8 are denoted by the same reference numerals, and description thereof will be omitted. In the figure, reference numeral 6 denotes a flow control valve provided between the pouring on / off valve 5 and the temperature sensor 7 in the first tapping path 2 of the automatic hot water supply device 1 and adjusting the amount of hot water flowing through the first tapping path 2. , And the control unit 12.

Next, the operation of the automatic hot water supply apparatus 1 according to the first embodiment will be described with reference to the flowchart of FIG. For example, when filling the bath 14 with hot water,
The filling section temperature is set by the operation section 13 and the filling operation is started. When the operation unit 13 is operated, the control unit 12 mixes the hot water from the hot water flow path 18 and the hot water from the water flow path 17 with the bath hot water mixing valve 3 and opens the pouring on-off valve 5 to open the first hot water opening / closing valve 5. The mixed hot water is poured into the hot water discharge path 2. Next, based on the temperature of the mixed hot water detected by the temperature sensor 7, the bath hot water mixing valve 3 is controlled so that the mixing ratio of hot water and water becomes the set hot water temperature, and the bathtub adapter is connected via the bath piping. Hot water is supplied to bathtub 14 from 15. At this time, the hot water amount adjustment valve 6 does not operate. Then, based on the detection result of the flow sensor 4, the bathtub 14
When a predetermined amount of hot water is supplied to the inside, the pouring on / off valve 5 is closed to complete the filling. When hot water is supplied to bathtub 14 alone, the amount of hot water supplied is approximately 10 to 15 L.
/ Min.

When hot water is supplied from the faucet 16,
When the faucet 16 is opened and the flow sensor 10 detects the tapping of the faucet 16, the control unit 12 controls the general faucet mixing valve 9.
To mix the hot water from the hot water flow path 18 and the water flow path 17 with the water, and to flow the mixed hot water into the second hot water supply path 8. Then, based on the hot water supply temperature detected by the temperature sensor 11, the general faucet mixing valve 9 is controlled 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 16 via the water pipe.

Further, when the hot water is supplied to the bathtub 14 and the hot water is supplied from the faucet 16 at the same time, for example, when the hot water is supplied from the faucet 16 at the hot water temperature set by the operation unit 13 (S1 in FIG. 3). Then, the controller 12 keeps the movable valve element 18 of the general faucet mixing valve 9 at a position corresponding to the set hot water supply temperature so that hot water is supplied from the faucet 16 as before (S2, S3). ). Then, when hot water is supplied to the bathtub 14, especially when hot water is supplied to the bathtub 14 (S
4) The control unit 12 adjusts the movable valve element 18 of the bath water filling mixing valve 3 to fully open the hot water flow path 18 side and completely close the water flow path 17 side. The flow control valve 6 is controlled so that the flow rate is equal to or less than a predetermined amount (for example, 5 L / min), and the flow rate to the bathtub 14 is reduced (S5).
6).

At this time, when the movable valve element 18 of the bath water mixing valve 3 is adjusted to open the hot water flow path 18 side fully, the hot valve element 18 of the general faucet mixing valve 9 remains at the same position. Although the amount of hot water from the flow path 18 decreases and the temperature of hot water supplied from the faucet 16 decreases, the flow rate to the first tapping path 2 is limited to a predetermined amount or less by the flow rate regulating valve 6. The position of the movable valve element 18 of the second
The hot water amount can be made to hardly fluctuate, and hot water is supplied from the faucet 16 at the set hot water supply temperature (S7, 8). The hot water in the bathtub 14 is mainly filled with a predetermined amount (for example, 200 L). Even if there is some temperature variation, the temperature of the hot water in the bathtub 14 reaches the set temperature upon completion of the hot water filling. Therefore, the flow rate on the first tapping path 2 side is limited.

In addition, when hot water is supplied to the bathtub 14 and hot water is supplied from the faucet 16 at the same time, when the hot water supply to the bathtub 14 is stopped, particularly when the high-temperature hot water supply to the bathtub 14 is stopped, the hot water is supplied to the operation unit 13. When the stop operation is performed (S9), the control unit 12
Closes the pouring on / off valve 5 and stops the tapping into the first tapping path 2. Next, the movable valve element 18 of the mixing valve 3 for bath water filling
When the hot water flow path 22 is fully closed by adjusting the temperature, the amount of hot water from the hot water flow path 18 increases and the hot water supply temperature rises while the movable valve element 18 of the general faucet mixing valve 9 remains at the same position. 6, the flow rate to the first tapping path 2 is limited to a predetermined amount or less (S10). Therefore, the position of the movable valve element 18 of the general faucet mixing valve 9 is hardly changed and the second tapping path 8 The amount of hot water can hardly fluctuate, and hot water is supplied from the faucet 16 at the set hot water temperature (S11, S12). When the faucet 16 is closed, the hot water supply from the faucet 16 ends (S1).
3).

As described above, the hot water filling the bathtub 14 and the faucet 1
When the hot water supply from 6 is performed at the same time, the flow rate of the first hot water passage 2 is limited to a predetermined amount or less by the flow rate adjusting valve 6.
The movable valve element 18 of the bath water filling mixing valve 3 and the movable valve element 18 of the general faucet mixing valve 9 are hardly adjusted, and the amount of hot water from the hot water flow path 18 of the second hot water supply path 2 and the flow rate from the water flow path 17 It is possible to suppress a large fluctuation in the amount of water, to supply hot water from the faucet 16 at the set hot water supply temperature, and to fill the bathtub 14 at the set hot water temperature. Thus, the low-cost automatic hot water supply device 1
Can be obtained. And the automatic hot water supply apparatus 1 which can respond quickly to the adjustment of the mixing valve 3 for bath water filling and the mixing valve 8 for general faucet by opening and closing the faucet 16 in a short time and can respond to the required hot water supply with good response performance. be able to.

Embodiment 2 FIG. In the second embodiment, in the automatic water heater 1 according to the first embodiment shown in FIGS. 1 and 2, the control unit 12 controls the flow rate adjusting valve 6 in accordance with the hot water temperature set in the bathtub 14. The amount of hot water supplied to the bathtub 14 is limited.

Next, the operation of the automatic hot water supply apparatus 1 according to the second embodiment will be described with reference to the flowchart of FIG. The case where hot water supply to bathtub 14 and hot water supply from faucet 16 are performed independently is the same as the case described in the first embodiment. Filling the bathtub 14 with a faucet 16
For example, when hot water is supplied from the faucet 16 at the hot water temperature set by the operation unit 13 (S21 in FIG. 4), the control unit 12 continues to supply hot water from the faucet 16 as before. Mixing valve 9 for general faucet so that
The hot water is supplied while maintaining the movable valve element 18 at a position corresponding to the set hot water supply temperature (S22, S23). And bathtub 1
When the hot water is supplied to the bath 4, especially when the hot water is supplied to the bath 14 at a high temperature (for example, 60 ° C. or more) (S 24, 25), the control unit 12
Adjusts the movable valve element 18 of the bath water filling valve 3 to fully open the hot water flow path 18 side and completely close the water flow path 17 side. However, the predetermined amount (for example, 5 L / Minutes)
The flow control valve 6 is controlled so that the following flow rate is obtained, and the bathtub 1 is controlled.
4 is reduced (S26, 27).

At this time, when the movable valve body 18 of the bath water filling mixing valve 3 is adjusted to fully open the hot water flow path 18 side, the hot water mixing valve 9 of the general faucet mixing valve 9 remains at the same position, Although the amount of hot water from the flow path 18 decreases and the temperature of hot water supplied from the faucet 16 decreases, the flow rate to the first tapping path 2 is limited to a predetermined amount or less by the flow control valve 6. The position of the movable valve element 18 of the second
The hot water amount can be made to hardly fluctuate, and hot water is supplied from the faucet 16 at the set hot water supply temperature (S28, 29).

When hot water is not supplied to the bathtub 14 at a high temperature (for example, 60 ° C. or higher) (S25), the control unit 12
Adjusts the movable valve element 18 of the bath water mixing valve 3 to correspond to the set bath temperature, and the movable valve element 18 of the general faucet mixing valve 9 also corresponds to the bath water mixing valve 3. The hot water is supplied to the bathtub 14 and the faucet 16 (S30, 31). At this time, the flow control valve 6
Thus, the flow rate of the first tapping path 2 is not limited.

Then, when the filling of the bathtub 14 and the supply of hot water from the faucet 16 are performed simultaneously, when the filling of the bathtub 14 is stopped, the operation section 13 performs the operation of stopping the filling (S32). ), Control part 12 closes pouring on / off valve 5 and stops tapping into first tapping path 2. Next, when the flow rate to the first tapping path 2 is limited to a predetermined amount or less by the flow rate adjusting valve 6 (S33), the position of the movable valve element 18 of the general faucet mixing valve 9 is hardly changed. 2 hot springs 8
The hot water amount can be made to hardly fluctuate, and hot water is supplied from the faucet 16 at the set hot water supply temperature (S34, S35). If the flow rate to the first hot water path 2 is not restricted by the flow rate adjusting valve 6 (S32), the mixing valve 9 for a general faucet is used.
The movable valve element 18 is adjusted to correspond to the set hot water supply temperature, and hot water is supplied from the faucet 16 (S34, 35). When the faucet 16 is closed, the hot water supply from the faucet 16 ends (S36).

Thus, filling the bathtub 14 with the hot water and the faucet 1
When the hot water supply from the bath 6 is performed at the same time, the flow control valve 6 is controlled in accordance with the hot water temperature set in the bathtub 14, so that the flow rate of the first tapping path 2 is limited to a predetermined amount or less. The movable valve element 18 of the mixing valve 3 for bath water filling and the movable valve element 18 of the mixing valve 9 for general faucet are hardly adjusted,
It is possible to reliably suppress a large variation in the amount of hot water from the hot water flow path 18 and the amount of water from the water flow path 17 in the hot water supply path 2, and to perform hot water supply from the faucet 16 at the set hot water supply temperature, and The bathtub 14 can be filled with hot water at the set hot water temperature. Thereby, the automatic hot water supply device 1 at low cost can be obtained. The mixing valve 3 for bath water filling and the mixing valve 8 for general faucet by opening and closing the faucet 16.
The automatic hot water supply apparatus 1 which can respond quickly to the required hot water supply and can respond to required hot water supply with good response performance can be obtained.

In the second embodiment, the bathtub 14
When the hot water is supplied at a high temperature (for example, 60 ° C. or more), the flow control valve 6 is controlled to limit the flow rate of the first tapping path 2.
The flow control valve 6 may be controlled when the following hot water supply is performed. In this case, the same effect can be obtained.

Embodiment 3 In the third embodiment, in the automatic hot water supply apparatus 1 according to the first embodiment shown in FIGS. 1 and 2, the temperature of the hot water temperature set in the bathtub 14 by the control unit 12 and the temperature of the hot water temperature set in the faucet 16. The flow control valve 6 is controlled according to the difference to limit the amount of hot water supplied to the bathtub 14.

Next, the operation of the automatic hot water supply apparatus 1 according to Embodiment 3 will be described with reference to the flowchart of FIG. The case where hot water supply to bathtub 14 and hot water supply from faucet 16 are performed independently is the same as the case described in the first embodiment. Filling the bathtub 14 with a faucet 16
When the hot water is supplied from the faucet 16 at the same time, for example, when hot water is supplied from the faucet 16 at the hot water temperature set by the operation unit 13 (S41 in FIG. 5), the control unit 12 continues to supply hot water from the faucet 16 as before. Mixing valve 9 for general faucet so that
The hot water is supplied while maintaining the movable valve element 18 at a position corresponding to the set hot water supply temperature (S42, 43). And bathtub 1
4, the hot water temperature is high (for example, 60 ° C. or more) and the hot water supply temperature from the faucet 16 (for example, 35 ° C.).
When the temperature difference is equal to or more than a predetermined value (for example, 25 ° C. or more) (S44, 45), the control unit 12 sets the first hot water path 2
, The flow control valve 6 is controlled so that the flow rate is equal to or less than a predetermined amount (for example, 5 L / min), and the flow rate to the bathtub 14 is reduced (S46, 47).

At this time, in order to supply hot water to the bathtub 14, the movable valve element 18 of the bath filling valve 3 is adjusted to open the hot water flow path 18 side fully. If the movable valve element 18 remains at the same position, the amount of hot water from the hot water flow path 18 decreases and the temperature of hot water supplied from the faucet 16 decreases, but the flow rate to the first hot water supply path 2 is controlled by the flow control valve 6 to a predetermined amount or less. Therefore, the position of the movable valve element 18 of the general faucet mixing valve 9 is hardly changed, and the amount of hot water in the second tapping path 8 can be hardly fluctuated, and hot water is supplied from the faucet 16 at the set hot water supply temperature. (S48, 49).

When the temperature difference between the hot water filling temperature of the bathtub 14 and the hot water supply temperature from the faucet is smaller than a predetermined value (S4).
5) The control unit 12 adjusts the movable valve body 18 of the bath water mixing valve 3 so as to correspond to the set bath temperature, and also controls the movable valve body 18 of the general faucet mixing valve 9 by bath water filling. The hot water supply to the bathtub 14 and the hot water supply from the faucet 16 are performed by adjusting the temperature according to the mixing valve 3 (S50, 51). At this time, the flow rate of the first tapping path 2 is not limited by the flow rate adjusting valve 6.

When the filling of the bathtub 14 and the supply of hot water from the faucet 16 are simultaneously performed and the filling of the bathtub 14 is stopped, the operation unit 13 performs an operation of stopping the filling (S52). ), Control part 12 closes pouring on / off valve 5 and stops tapping into first tapping path 2. Next, when the flow rate to the first tapping path 2 is limited to a predetermined amount or less by the flow rate adjusting valve 6 (S53), the position of the movable valve element 18 of the general faucet mixing valve 9 is hardly changed. 2 hot springs 8
The hot water amount can be made to hardly fluctuate, and hot water is supplied from the faucet 16 at the set hot water supply temperature (S54, 55). When the flow rate to the first tapping path 2 is not restricted by the flow rate adjusting valve 6 (S52), the mixing valve 9 for a general faucet is used.
The movable valve body 18 is adjusted to correspond to the set hot water supply temperature, and hot water is supplied from the faucet 16 (S54, 55). When the faucet 16 is closed, the hot water supply from the faucet 16 ends (S56).

As described above, the hot water filling the bathtub 14 and the faucet 1
When the hot water supply from the bath 6 is performed simultaneously, the flow control valve 6 is controlled in accordance with the temperature difference between the hot water temperature set in the bathtub 14 and the hot water temperature set in the faucet 16, and the first hot water passage 2
Is limited to a predetermined amount or less, the movable valve element 18 of the mixing valve 3 for bath water filling and the movable valve element 18 of the mixing valve 9 for general faucet are hardly adjusted, and the second tapping path 2
A large variation in the amount of hot water from the hot water flow path 18 and the large amount of water from the water flow path 17 can be reliably suppressed, hot water can be supplied from the faucet 16 at the set hot water supply temperature, and the set hot water temperature can be set. The bathtub 14 can be filled with hot water. Thus, the low-cost automatic hot water supply device 1
Can be obtained. And the automatic hot water supply apparatus 1 which can respond quickly to the adjustment of the mixing valve 3 for bath water filling and the mixing valve 8 for general faucet by opening and closing the faucet 16 in a short time and can respond to the required hot water supply with good response performance. be able to. Further, when the temperature difference is smaller than the predetermined value, the faucet 1
The hot water can be quickly filled while the hot water is supplied from 6, and the automatic hot water supply apparatus 1 corresponding to the use situation can be obtained.

[0036]

As described above, the automatic hot water supply apparatus according to the present invention has a first hot water outlet path and a second hot water outlet path each having mixing means for mixing hot and cold water from the hot water flow path and the first hot water supply path.
And a temperature detection means for detecting the temperature of each hot water path, and a control unit for controlling the mixing means for each hot water path based on the detection result of each temperature detection means. The first tapping path is connected to the bathtub side, the second tapping path is connected to the general faucet side, and the first tapping path is provided with flow rate adjusting means for adjusting the flow rate of the first tapping path. The control unit controls the flow rate adjusting means to reduce the flow rate of the first hot water supply path to a predetermined amount or less at the time of simultaneous hot water supply from the first and second hot water supply paths. Significant fluctuations in hot water supply on the general faucet side can be suppressed,
It is possible to obtain an automatic hot water supply device having a good response performance capable of supplying hot water at the set hot water supply temperature.

In the automatic hot water supply apparatus according to the present invention, the control unit comprises:
At the time of simultaneous hot water supply from the first and second hot water outlets, the flow rate adjusting means is controlled based on the hot water supply temperature set from the first hot water outlet to reduce the flow rate of the first hot water outlet to a predetermined amount or less.
By limiting the amount of hot water supplied to the bathtub side, it is possible to reliably suppress large fluctuations in hot water supply at the general faucet side, and to obtain an automatic hot water supply device that can supply hot water reliably at the set temperature with low cost and good response performance. it can.

In the automatic hot water supply apparatus according to the present invention, the control unit includes:
At the time of simultaneous hot water supply from the first and second hot water outlets, if the temperature difference between the set hot water supply temperatures from each hot water outlet is equal to or greater than a predetermined value, the flow rate adjusting means is controlled to control the flow rate of the first hot water outlet. Since it is not more than the fixed amount, it is possible to reliably suppress a large fluctuation of the hot water supply on the general faucet side, to improve the response performance of the hot water supply on the general faucet side reliably, and if the temperature difference is lower than a predetermined value, the general Hot water can be quickly filled while hot water is being supplied from the faucet, and an automatic hot water supply apparatus corresponding to the use situation can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic diagram showing a configuration of an embodiment of the present invention.

FIG. 2 is a block diagram of a main part of FIG.

FIG. 3 is a flowchart showing the operation of the first embodiment of the present invention.

FIG. 4 is a flowchart showing the operation of the second embodiment of the present invention.

FIG. 5 is a flowchart showing the operation of the third embodiment of the present invention.

FIG. 6 is a schematic diagram showing a configuration of a conventional automatic hot water supply apparatus.

FIG. 7 is a block diagram of a main part of FIG. 6;

FIG. 8 is a configuration diagram of a mixing valve according to the automatic hot water supply apparatus.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Automatic hot-water supply device, 2 First hot-water supply path, 3 Mixing valve for bath water filling, 6 Flow control valve, 7, 11 Temperature sensor, 8
2nd tap water path, 9 general faucet mixing valve, 12 control units,
14 bathtub, 16 faucet, 17 water flow path, 18 hot water flow path.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Jiro Kitayama 2-3-2 Marunouchi, Chiyoda-ku, Tokyo F-term in Mitsubishi Electric Corporation (reference) 3L024 CC01 CC08 DD12 GG05 HH14

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 are provided in the first and second hot water paths, respectively.
A temperature detecting means for detecting a temperature of each tapping path; and a control unit for controlling a mixing means of each tapping path based on a detection result of each temperature detecting means. Connected to a bathtub side, the second tapping path is connected to a general faucet side, and the first tapping path is provided with flow rate adjusting means for adjusting a flow rate of the first tapping path;
An automatic hot water supply device, wherein the control unit controls the flow rate adjusting means to reduce the flow rate of the first hot water supply path to a predetermined amount or less at the time of simultaneous hot water supply from the first and second hot water supply paths. . 2. 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 are provided in the first and second tapping channels, respectively.
A temperature detecting means for detecting a temperature of each tapping path; and a control unit for controlling a mixing means of each tapping path based on a detection result of each temperature detecting means. Connected to a bathtub side, the second tapping path is connected to a general faucet side, and the first tapping path is provided with flow rate adjusting means for adjusting a flow rate of the first tapping path;
The controller controls the flow rate adjusting means based on the hot water supply temperature set from the first hot water supply path at the time of simultaneous hot water supply from the first and second hot water supply paths, and controls the flow rate of the first hot water supply path. An automatic hot water supply device characterized in that the flow rate is equal to or less than a predetermined amount. 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.
A temperature detecting means for detecting a temperature of each tapping path; and a control unit for controlling a mixing means of each tapping path based on a detection result of each temperature detecting means. Connected to a bathtub side, the second tapping path is connected to a general faucet side, and the first tapping path is provided with flow rate adjusting means for adjusting a flow rate of the first tapping path;
The control unit controls the flow rate adjusting means when the temperature difference between the set hot water supply temperatures from the respective hot water outlets is equal to or greater than a predetermined value during simultaneous hot water supply from the first and second hot water outlets. An automatic hot water supply apparatus characterized in that the flow rate of the hot water supply path is set to a predetermined amount or less.