JPH11132561A - Hot water supply apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply hot water at a specified temperature or below from a hot water supply tap without stopping high temperature hot water supply to a bathtub upon opening of the tap by changing the temperature of the high temperature hot water to a specified point or below when use of other hot water supply tap is requested during high temperature hot water supply to the bathtub. SOLUTION: Hot water stored in a hot water storage tank 1 passes through a mixing valve hot water supply pipe 10 to reach a motor hot water mixing valve 4 and mixed with water from a water source passed through the mixing valve hot water supply pipe 10 and reached the motor hot water mixing valve 4. A control section 26 controls the motor hot water mixing valve 4 such that the temperature detected through a second temperature sensor 23 will be equal to a bathtub temperature being set by a setter at an operating section 27. Hot water of appropriate temperature is then supplied through bathtub piping 11 into a bathtub 2 by opening a solenoid valve 22 and the bathtub 2 is started to be filled with hot water. Since the hot water temperature decreases with time after the bathtub 2 is filled with hot water, hot water supply is started by turning a high temperature hot water supply switch in the setter at the operating section 27 on. The mixing valve 4 is regulated by detecting water flow through a second flow sensor using the first tap 5 and the hot water temperature is changed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a hot water supply device,
More specifically, the present invention relates to a hot water supply device that can supply hot water to a hot water tap in a kitchen or the like in addition to hot water supply or hot water supply to a bathtub.

[0002]

2. Description of the Related Art FIG. 1 is a block diagram of a hot water supply apparatus according to the present invention. Since the configuration of the prior art is almost the same, the operation of hot water supply control of the conventional hot water supply apparatus will be described below with reference to the drawings according to the present invention. explain. When a high-temperature hot water supply switch is pressed by a setting device of the operation unit 27 to issue a high-temperature hot water supply instruction, the electric hot water mixing valve 4 controls the hot water supply temperature to be as high as, for example, 80 ° C. Make a liter of hot water. In this state, when only the hot water of the other hot water tap 5 (or 6) is opened, the hot water from the hot water tap 14 is set to 8
Hot water at 0 ° C is supplied.

According to the above hot water supply device, only one electric hot water mixing valve 4 for controlling the hot water temperature is provided, so that only one type of hot water temperature can be controlled. When the hot water tap 5 (or 6) is opened, the hot water at 80 ° C. comes out of the hot water tap 5 so that there is a problem that the usability is poor.

In order to solve such a problem, a bathtub 2
When the hot water tap 5 is opened during the hot water supply to the hot water, the opening of the hot water tap 5 is detected by the flow sensor 25 on the hot water tap 5 side, the electromagnetic valve 22 is closed, and the hot water supply to the bathtub 2 is stopped. It is also conceivable to switch the hot water temperature to a temperature suitable for hot water from hot water tap 5.

[0005]

According to the hot water supply apparatus configured as described above, the high temperature hot water supply itself is stopped in response to a high temperature hot water supply request to increase the hot water temperature during bathing. It is not easy to use for bathing people. Further, if hot water is continuously supplied by the hot water tap 5 for a long time, hot water cannot be supplied to the bathtub 2 at any time.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and is a hot water supply apparatus which has only one electric hot water mixing valve for controlling hot water temperature and can control only one type of hot water temperature. Even if a hot water tap is opened during hot water supply, a convenient water heater that allows hot water below a certain temperature to come out of the hot water tap without stopping hot water supply to the bathtub With the goal.

[0007]

The hot water supply apparatus according to the present invention changes the temperature of the hot water supply to a certain temperature or less when there is a request to use another hot water tap during the high temperature water supply to the bathtub. It is something to do.

[0008] Further, a hot water storage tank for heating and storing water, an electric hot water mixing valve for mixing hot water and water heated in the hot water storage tank, and a hot and cold water bath mixed by the electric hot water mixing valve. An electromagnetic valve for controlling the supply of water, a hot water tap for branching and supplying hot water from between the electric hot and cold water mixing valve and the electromagnetic valve, a control unit for controlling the mixing ratio of hot and cold water by the electric hot and cold water mixing valve, opening and closing of the electromagnetic valve, A hot water supply device comprising an operation unit for instructing a control unit and the like.When the control unit opens a hot water tap during hot water supply to a bathtub, the electric water / water mixing valve changes the mixing ratio of hot water and hot water. Control means for lowering the temperature of the mixed hot water is provided.

When the control unit opens the hot-water tap during hot water supply to the bathtub, the mixing ratio of the hot water is changed by the electric hot water mixing valve to lower the temperature of the mixed hot water, and the hot water is supplied to the bathtub. Control means for increasing the integrated flow rate of hot water is provided.

Further, a temperature sensor for detecting the temperature of the mixed hot and cold water, a flow sensor for detecting the flow rate to the bathtub, and a flow rate sensor for detecting the flow rate to the hot water tap are provided.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 is a configuration diagram of Embodiment 1 of the present invention. 1 is a hot water storage tank of the hot water supply device, 2 is a bathtub, 3 is a bathtub adapter provided in the bathtub 2, and 4 is an electric hot water mixing valve driven by a motor. Reference numerals 5 and 6 denote first and second hot-water taps each including a hot-water tap and a water tap.

Reference numeral 7 denotes a water supply pipe connecting the water source and the hot water storage tank 1.
One end is connected to a water source, and the other end is branched into a hot water tank water supply pipe 8 and a mixing valve water supply pipe 9. The hot water tank water supply pipe 8 is connected to the bottom of the hot water tank 1, and the mixing valve water supply pipe 9 is electrically driven. Hot water mixing valve 4
It is connected to the. A mixing valve hot water supply pipe 10 has one end connected to the upper part of the hot water storage tank 1 and the other end connected to the electric hot water mixing valve 4. Reference numeral 11 denotes a bathtub pipe, one end of which is connected to the electric hot water mixing valve 6 and the other end of which is connected to the bathtub adapter 3 of the bathtub 1.

Reference numeral 12 denotes a hot-water tap water supply pipe branched from the bathtub piping 11, and the first and second hot-water tap water supply pipes 13 and
14 and are connected to the hot water tap portions of the first and second hot water taps 5 and 6, respectively. Reference numeral 15 denotes a water tap water supply pipe branched from the water supply pipe 7, and the other end thereof includes first and second water tap water supply pipes 16,
It branches into 17 and is connected to the faucet part of the 1st, 2nd hot water taps 5 and 6, respectively.

Reference numeral 18 denotes a heating element provided in the hot water tank 1, reference numeral 19 denotes a first temperature sensor provided in the water storage tank 1, and reference numeral 20 denotes a pressure reducing valve provided in the water supply pipe 7. Reference numeral 21 denotes a relief valve provided on the upper side of the hot water tank 1 of the mixing valve hot water supply pipe 10 in order to eliminate the expansion water in the hot water tank 1. Reference numeral 22 denotes an electromagnetic valve that is opened and closed by a switch, and is provided in the bathtub piping 11. Reference numerals 23 and 24 denote a second temperature sensor and a first flow sensor provided in the bathtub piping 11 between the electric hot / water mixing valve 4 and the solenoid valve 22. 2
Reference numeral 5 denotes a second flow sensor provided on the hot water supply pipe 12.

Reference numeral 26 designates input of the output signals of the first temperature sensor 19, the second temperature sensor 23, the first flow sensor 24 and the second flow sensor 25, and the heating element 18, the electric hot / water mixing valve 4 And a control unit for controlling the solenoid valve 22.
Reference numeral 7 denotes an operation unit having a setting device.

The hot water supply operation of the first embodiment configured as described above will be described. First, the water supplied from the water source to the water supply pipe 7 is depressurized through the pressure reducing valve 20 and flows into the hot water storage tank 1 through the hot water supply pipe 8. Thus, for example, when electricity is supplied to the heating element 18 using midnight power, the water in the hot water storage tank 1 is heated. Then, when the first temperature sensor 19 detects a boiling temperature of, for example, 90 ° C. which is set in advance by the operation unit 27, the power supply to the heating element 18 is stopped.
Note that while the hot water in the hot water tank 1 is being heated, the hot water tank 1
The water inside expands and is drained from the relief valve 21. Thus, the inside of the hot water storage tank 1 is always filled with water or hot water.

Hot water stored in the hot water storage tank 1 reaches the electric hot water mixing valve 4 through the mixing valve hot water supply pipe 10, and from the water source to the electric hot water mixing valve 4 through the water supply pipe 7 and the mixing valve water supply pipe 9. Mix with the water reached. Here, the mixing ratio of the electric hot and cold water mixing valve 4 is adjusted based on the input value from the second temperature sensor 23, so that the hot water has a proper temperature. That is, the second temperature sensor 23
The control unit 26 controls the electric hot and cold water mixing valve 4 such that the detected temperature of the bathtub becomes the bathtub temperature preset by the setting device of the operation unit 27.

The hot water which has been heated to an appropriate temperature is supplied to the solenoid valve 22.
Is opened and supplied to the bathtub 2 through the bathtub piping 11, and the filling of the bathtub 2 is started. The integrated flow rate of hot water passing through the bathtub piping 11 is counted by the first flow rate sensor 24, and filling is continued until the bathtub hot water amount set in advance by the operation unit 27 is reached. When the accumulated flow reaches the set bath water amount, the electromagnetic valve 22 is closed to complete the filling.

Next, the operation when hot water is supplied after hot water filling is completed and the operation when a hot water tap is used will be described with reference to the flowchart of FIG. When the filling is completed as described above, the temperature of the hot water in the bathtub 2 decreases with time. For this reason, when hot water is to be supplied into the bathtub 2, the high-temperature hot water switch provided on the setting device of the operation unit 27 is turned ON, and the high-temperature hot water is started. Then, the electric hot water mixing valve 4 is controlled to mix the water and the hot water so that the temperature detected by the second temperature sensor 23 becomes high, for example, 80 ° C. (step S-1).

Next, the solenoid valve 22 is opened and the bathtub piping 11 is opened.
To start supplying hot water to the bathtub 2 (step S-2). Then, the integrated flow rate detected by the first flow rate sensor 24 is, for example, 2
Check whether it has reached 0 liter (Step S-
3). When the accumulated flow reaches 20 liters, the solenoid valve 2
2 is closed, the hot water supply to the bathtub 2 is completed (step S-4), and the process is terminated.

When the integrated flow rate detected by the first flow rate sensor 23 has not reached 20 liters, it is checked whether or not the second flow rate sensor 25 has detected a water flow in the hot water supply pipe 12. . That is, it is checked whether or not the first hot water tap 5 (or the second hot water tap 6) is used during the hot water supply (step S-5). If the second flow sensor 25 does not detect the water flow, it is checked again whether the integrated flow of the first flow sensor 24 has reached 20 liters (step S-3).

When the first hot water tap 5 is used during hot water supply and the second flow rate sensor 25 detects a water flow in the hot water tap water supply pipe 12, the opening of the electric hot water mixing valve 4 Is adjusted, and the temperature of the hot water is changed from 80 ° C. to, for example, 50 ° C. (step S-6). It is checked whether or not the integrated flow rate detected by the first flow rate sensor 24 has reached the prescribed flow rate of high-temperature hot water of 20 liters while keeping the temperature changed to 50 ° C. (step S-3). High-temperature hot water is 20 hot water
When the amount reaches 1 liter, the solenoid valve 22 is closed, the hot water supply to the bathtub 2 is completed (step S-4), and the process ends.

In the above description, the first and second flow rate sensors 24 determine whether or not the hot water is being supplied to the bathtub 2 and whether or not the first and second hot water taps 5 and 6 are in use. , 25
, But may be detected by a water flow switch. Further, in the above description, an example of the electric water heater is shown as the hot water supply device, but the invention is not limited to this.
For example, a gas hot water supply device or an oil hot water supply device may be used. According to the first embodiment, other hot water taps 5,
When 6 uses hot water, without stopping hot water supply,
Since the temperature of the hot water is set to a certain temperature or lower, burns are eliminated and the usability is improved.

Second Embodiment In the first embodiment, it is checked whether or not the second flow rate sensor 25 detects the water flow of the hot-water tap water supply pipe 12 at the time of hot water supply (step S-5). When the hot water is detected, the temperature of the hot water is changed, for example, from 80 ° C. to 50 ° C., but the prescribed amount of the hot water remains at 20 liters. In the second embodiment, when the second flow rate sensor 25 detects a water flow, the hot water temperature of the hot water supply is changed from 80 ° C. to 50 ° C.
In the first embodiment, the integrated flow rate determination level at the time of checking whether or not the value detected by the first flow rate sensor 24 has reached the specified hot water supply amount (step S-3). In the second embodiment, the integrated flow rate is changed from 20 liters shown to a larger integrated flow rate, for example, 40 liters.

According to the second embodiment, since the integrated flow determination level of the first flow sensor 24 is changed to the integrated flow value larger than the value shown in the first embodiment, the hot water temperature of the hot water supply is reduced. Even if the temperature drops, the temperature rise of the hot water in the bathtub 2 is maintained.

The present invention includes a temperature sensor for detecting the temperature of the mixed hot and cold water, a first flow sensor for detecting the flow rate to the bathtub, and a second flow sensor for detecting the flow rate to the hot water tap as described above. , Corresponding to these detection signals, the control unit,
When the hot-water tap is opened while hot water is being supplied to the bathtub, control means for lowering the temperature of the mixed hot water by changing the mixing ratio of hot water using the electric hot-water mixing valve, or in addition to this, Since the control means for increasing the integrated amount is provided, a convenient water heater can be obtained.

[0027]

In the hot water supply apparatus according to the present invention, when there is a request to use another hot water tap during high temperature hot water supply to the bathtub, the hot water temperature of the hot water supply is changed to a certain temperature or lower. Therefore, the temperature of the hot water from the hot-water tap can be kept at a certain temperature or lower without stopping the hot water supply, and a convenient water heater can be obtained.

Further, the hot water supply apparatus according to the present invention includes a hot water tank for heating and storing water, an electric hot water mixing valve for mixing hot water and water heated in the hot water tank, and an electric hot water mixing valve. Valve that controls the supply of hot and cold water mixed into the bathtub, a hot water tap that branches from between the electric hot and cold water mixing valve and the solenoid valve, the mixing ratio of hot and cold water by the electric hot and cold water mixing valve, and opening and closing of the solenoid valve A hot water supply device comprising a control unit for controlling the operation of the hot water supply device and an operation unit for instructing the control unit. Since the control means for changing the mixing ratio of hot and cold water to lower the mixed hot water temperature is provided, the hot water temperature can be kept at a certain temperature or lower without stopping the high-temperature hot water supply, and the usability is improved.

When the control unit opens the hot-water tap during hot water supply to the bathtub, the mixing ratio of hot water is changed by the electric hot water mixing valve to lower the temperature of the mixed hot water, and the hot water is supplied to the bathtub. Since the control means for increasing the cumulative flow rate of hot water is provided, the temperature of the hot water can be kept at a certain temperature or less without stopping the high-temperature hot water supply. Since the integrated flow rate is increased, the temperature of the hot water in the bathtub is maintained at a high level.

Further, a temperature sensor for detecting the temperature of the mixed hot and cold water, a flow rate sensor for detecting the flow rate to the bathtub, and a flow rate sensor for detecting the flow rate to the hot water tap are provided. Done in

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a first embodiment of the present invention.

FIG. 2 is a flowchart showing the operation of FIG.

[Explanation of symbols]

1 Hot water storage tank, 2 bathtub, 4 electric hot water mixing valve, 5 first
Hot water tap, 6 second hot water tap, 11 bathtub piping, 12
Hot water tap water supply pipe, 22 electromagnetic valve, 23 second temperature sensor, 24 first flow rate sensor, 25 second flow rate sensor, 26 control unit, 27 operation unit.

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Tadashi Masuda, Inventor, Kansai Electric Power Co., Inc. 3-2-2 Nakanoshima, Kita-ku, Osaka-shi (72) Inventor Yoshihide Mori 3-2-2, Nakanoshima, Kita-ku, Osaka-shi Inside Kansai Electric Power Co., Inc. (72) Inventor Tatsuya Okui 3-2-2 Nakanoshima, Kita-ku, Osaka-shi

Claims (4)

[Claims] 1. A hot water supply apparatus comprising: changing a hot water temperature of a hot water supply to a certain temperature or lower when a request for using another hot water tap is made during high temperature water supply to a bathtub. 2. A hot water tank for heating and storing water, an electric hot water mixing valve for mixing hot water and water heated in the hot water tank, and hot water mixed by the electric hot water mixing valve. A solenoid valve for controlling the supply to the bathtub, a hot water tap for branching and supplying hot water from between the electric hot water mixing valve and the solenoid valve, a mixing ratio of hot water by the electric hot water mixing valve, opening and closing of the electromagnetic valve, etc. A hot water supply device, comprising: a control unit that performs a hot water supply operation to the control unit; and an operation unit that instructs the control unit. A hot water supply device comprising a control means for changing a mixing ratio of hot and cold water to lower a mixed hot water temperature. 3. When the control unit opens the hot water tap during hot water supply to the bathtub, the mixing ratio of hot water is changed by an electric hot water mixing valve to lower the mixed hot water temperature, 3. The hot water supply apparatus according to claim 1, further comprising control means for increasing an integrated flow rate of hot water. 4. A temperature sensor for detecting a temperature of the mixed hot and cold water,
The hot water supply apparatus according to any one of claims 1 to 3, further comprising a flow rate sensor for detecting a flow rate to the bathtub and a flow rate sensor for detecting a flow rate to the hot water tap.