JPH11211220A - Electric water heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance operability while eliminating temperature fluctuation or waiting time of hot water supply to a bathtub even when hot water is supplied simultaneously to general faucets and the bathtub. SOLUTION: The electric water heater comprises a plurality of means for mixing hot water boiled in a hot water storage tank 2 with water supplied from a water source. At least one of the mixing means 6A, 6B is coupled with piping for supplying appropriately mixed hot water to a bathtub 8 and at another mixing means is coupled with piping for supplying appropriately mixed hot water to general faucets 12, 13, 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric water heater having a hot water tank and supplying hot water to a bathtub or a general faucet.

[0002]

2. Description of the Related Art FIG. 4 is a circuit diagram of a piping system showing the structure of a conventional electric water heater of this type.

In FIG. 4, reference numeral 1 denotes a pressure reducing valve for reducing the pressure of water supplied from a water source, 2 denotes a hot water storage tank for storing water or hot water, 3 denotes a heating element for boiling water in the hot water storage tank 2, and 4 denotes hot water storage. A boiling water temperature sensor for detecting the temperature of water in the tank 2;
Is a relief valve for releasing hot water whose volume has been expanded by boiling, 6 is an electric hot water mixing valve for mixing the hot water and water in the hot water storage tank 2 at an appropriate temperature, and 7 is a correction valve for the electric hot water mixing valve 6. Hot water temperature sensor, 8 is a bathtub, 9 is an electromagnetic valve that opens and closes a hot water supply circuit to the bathtub 8, 10 is a bathtub hot water flow rate sensor that measures the amount of hot water supplied to the bathtub 8, and 11 is whether or not a general faucet is opened. A faucet hot water supply flow rate sensor (or flow sensor) to be detected, 12 is a kitchen faucet, 13 is a wash faucet, 14 is a bathroom curan / shower, 15 is a control unit that controls the entire control, 16 is a kitchen remote controller, and 17 is a bathroom remote control. It is a remote control.
The units 1 to 7, 9 to 11, and 15 are put together as a unit 18 and arranged outside the room.

Next, the operation of the conventional electric water heater will be described. Here, the kitchen faucet 12 and the wash faucet 1
3, and the callan / shower 14 in the bathroom are collectively referred to as "general faucet", and "hot water supply from the general faucet" includes both cases where they are used singly and where a plurality of them are used simultaneously. First, the water supplied from the water source is reduced in pressure by the pressure reducing valve 1 and flows into the hot water storage tank 2. Hot water tank 2 is always full of water or hot water. When electric power is supplied to the heating element 3 using electric power or the like at midnight, the water in the hot water storage tank 2 is heated.

[0005] The boiling water temperature of the hot water storage tank 2 is controlled by the kitchen remote control 1.
When the boiling water temperature sensor 4 detects the set boiling water temperature (for example, 90 ° C.), the control unit 15 stops the power supply to the heating element 3. During the heating, the water in the hot water storage tank 2 expands, and the expanded water is drained from the relief valve 5 serving as a safety device.

[0006] The temperature of hot water from a general faucet is set in advance by the kitchen remote controller 16 or the bathroom remote controller 17. For example, when the faucet 12 of the kitchen is opened, the control unit 15 turns to the set faucet hot water temperature. Control the electric hot and cold water mixing valve 6 to mix the hot water and water in the hot water tank 2 at an appropriate temperature,
The electric hot water mixing valve 6 is corrected based on the input value of the hot water temperature sensor 7. In addition, the faucet hot water temperature is set to an upper limit (for example, 60 ° C.) for the maximum set hot water temperature, and consideration is given to prevent instantaneous burns.

The temperature of hot water supplied to bath 8 is set in advance by bathroom remote controller 17. The hot water supply operation to the bathtub 8 includes four patterns of hot water, hot water, hot water, and pouring water.

[0008] In hot water filling operation bathroom remote controller 17, press the hot water filling switch, issues a command for water filling, the control unit 15 are the bath water temperature detected temperature of the hot water supply hot water temperature sensor 7 is set in the bathroom remote controller 17 In addition to controlling the electric hot water mixing valve 6 so as to satisfy the condition, the electromagnetic valve 9 is opened to start filling the bathtub 8 with hot water. After the filling of the bathtub 8 is started, the integrated flow rate is counted by the bathtub hot water supply flow rate sensor 10 and the filling is continued until the bath water amount set in advance by the bathroom remote controller 17 is reached. When the accumulated flow reaches the set bath water amount, the solenoid valve 9 is closed to complete the filling.

[0009] In the high temperature feed water operation bathroom remote controller 17, press the hot feed water switch, issues a command for high temperature feed water, the control unit 15, the detected temperature of the hot water supply hot water temperature sensor 7 becomes high (e.g., 60 ° C.) The electric hot water mixing valve 6 is controlled as described above, and the electromagnetic valve 9 is opened to start hot water supply to the bathtub 8. After the high-temperature hot water supply into the bathtub 8 is started, the integrated flow rate is counted by the bathtub hot water supply flow rate sensor 10, and when the accumulated flow reaches a certain amount (for example, 20 L), the electromagnetic valve 9 is closed to complete the high-temperature hot water supply.

When the hot water switch is pressed by the hot water operation bathroom remote controller 17 and a hot water command is issued, the control unit 15 determines that the temperature detected by the hot water temperature sensor 7 is set by the bath remote controller 17. The electric hot water mixing valve 6 is controlled so as to satisfy the following condition, and the solenoid valve 9 is opened to start adding hot water to the bathtub 8. After the addition of hot water to the bathtub 8, the integrated flow rate is counted by the bathtub hot water supply flow rate sensor 10, and when it reaches a certain amount (for example, 20 L), the electromagnetic valve 9 is closed to complete the hot water supply.

[0011] In the water injection operation bathroom remote controller 17, press the injection switch, issues a command for water injection, the control unit 15, an electric hot and cold water mixing valve 6 opens the water side full control to water water water source directly At the same time, the solenoid valve 9 is opened to start water injection into the bathtub 8. After the water injection into the bathtub 8 is started, the accumulated flow rate is counted by the flow rate sensor 10 and when the accumulated flow rate reaches a certain amount (for example, 20 L),
The injection of water is completed by closing the solenoid valve 9.

[0012]

The conventional electric water heater is
As described above, the hot water mixed by one electric hot water mixing valve 6 is branched and connected to the general faucet and the bathtub 8, so that the general faucet and the bathtub 8 have the same hot water temperature. Only hot water can be supplied. For example, when the general faucet is opened during high-temperature hot water supply, the high-temperature hot water temperature (for example, 60 ° C.) regardless of the hot water supply setting temperature (for example, set to 40 ° C.) of the general faucet.
Is heated. For this reason, there was a problem that usability was poor.

Therefore, as shown in, for example, JP-A-63-91452, when a general faucet is opened during high-temperature hot water supply, this is detected by a faucet hot water supply flow rate sensor, There has been proposed a type in which hot water is made to stand by and an electric hot / water mixing valve is adjusted so as to reach a set hot water temperature of a general faucet so that hot water is supplied, that is, a lower hot water temperature setting is prioritized.

However, in such a configuration in which the lower hot water temperature setting is prioritized, even when the hot water switch in the bathtub is low during bathing, the high temperature hot water switch is depressed.
If hot water is used for a long time in washing things in the kitchen, hot water is not supplied during that time, and the temperature of the hot water in the bathtub does not rise.

In addition, when the general faucet is opened while the water is being poured into the bathtub, water (for example, 10 ° C.) is supplied at the water temperature regardless of the setting of the faucet hot water temperature (for example, set to 40 ° C.). For this reason, there was a problem that usability was poor.

As a means for solving this problem, when the general faucet is opened during the water injection into the bathtub, the fact that the general faucet is opened is detected by the faucet hot water supply flow rate sensor, and the water injection into the bathtub is waited. Then, it is conceivable to adjust the electric hot water mixing valve so that the hot water temperature is set at the general faucet and supply hot water. However, in this case, even if you press the water injection switch when the temperature of the hot water in the bathtub is hot during bathing, if you continue to use the hot water for a long time in the washing of the kitchen, etc., the water will not be injected into the bathtub during that time. A further new problem arises in that the temperature of the hot water in the inside does not decrease and the usability deteriorates.

It is a technical object of the present invention to improve the usability even when hot water is supplied to a general faucet and a bathtub at the same time, without temperature fluctuations or waiting for hot water in the bathtub.

[0018]

According to a first aspect of the present invention, there is provided an electric water heater comprising a plurality of hot water mixing means for mixing hot water boiled in a hot water storage tank and water supplied from a water source. At least one of the means is connected to a bathtub hot water supply pipe for supplying hot water mixed at an appropriate temperature to a bathtub, and at least another is connected to a general faucet hot water supply pipe for supplying hot water mixed at an appropriate temperature to a general faucet. It was done.

Further, the electric water heater according to claim 2 of the present invention is provided with a plurality of hot water mixing means for mixing the hot water boiled in the hot water storage tank and the water supplied from the water source. At least one is connected to a general faucet hot water supply pipe that supplies hot water mixed at an appropriate temperature to a general faucet, and at least another is a bathtub that supplies hot water mixed at an appropriate temperature to a bathtub via a bathtub hot water supply opening / closing valve. A branch pipe connected to a hot-water supply pipe and connected between a hot-water mixing means on the bathtub side and a hot-bath hot-water supply opening / closing valve is connected to a bathroom curan / shower.

Further, the electric water heater according to claim 3 of the present invention is provided with a plurality of hot water mixing means for mixing the hot water boiled in the hot water storage tank and the water supplied from the water source. At least one is connected to a general faucet hot water supply pipe that supplies hot water mixed at an appropriate temperature to a general faucet, and at least another is connected to a bathtub hot water supply pipe that supplies hot water mixed at an appropriate temperature to a bathtub, and In the middle of the bathtub hot water supply pipe, a branch pipe connected to the bathroom curan and shower is connected, and at the branch point, when the bathroom curan and shower is used, hot water switching means for switching the hot water supply destination to the bathroom curan and shower side It is provided.

Further, the electric water heater according to claim 4 of the present invention is provided with means for independently setting the hot water supply temperature to the bath tub and the hot water supply temperature to the general faucet. Even if the hot water supply and the hot water supply to the general faucet are performed simultaneously, the hot water supply temperature setting means controls the hot water supply in accordance with each set hot water temperature.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. Hereinafter, the present invention will be described based on the illustrated embodiments. FIG. 1 shows claim 1 of the present invention.
FIG. 4 is a circuit diagram of a piping system showing an electric water heater according to No. 4, in which the same parts as those of the above-described conventional example (FIG. 4) are denoted by the same reference numerals.

In FIG. 1, reference numeral 1 denotes a pressure reducing valve for reducing the pressure of water supplied from a water source, 2 denotes a hot water storage tank for storing water or hot water, and 3 denotes a heating means for heating water in the hot water storage tank 2. 4, a boiling water temperature sensor for detecting the temperature of water in the hot water storage tank 2; 5, a relief valve for releasing hot water whose volume has been expanded by boiling; 6A, a hot water supply sensor for adjusting the temperature of hot water supplied to the bathtub 8 to an appropriate temperature. Electric hot / water mixing valve for bathtub hot water supply, 7A is a bathtub hot water temperature sensor for correcting the hot water / hot water mixing valve 6A for bathtub hot water, and 6B is a hot water / hot water mixing for faucet hot water supply for adjusting the temperature of hot water supplied to a general tap. A valve 7B is a faucet hot water temperature sensor for correcting the electric hot water mixing valve 6B for faucet hot water supply, 8 is a bathtub, 9 is a solenoid valve for opening and closing a hot water supply circuit to the bathtub 8, and 10 is a hot water supply amount to the bathtub 8. Bath water supply flow rate sensor for measuring the A faucet hot water supply flow sensor (or flow sensor) for detecting whether or not the general faucet is opened, 12 is a kitchen faucet, 13 is a wash faucet, 14 is a bathroom curan / shower, and 21 is a control unit which controls the whole. , 16 is a kitchen remote controller, 17 is a bathroom remote controller, and 18 is an outdoor unit.

Next, the operation of the electric water heater of the first embodiment will be described. The kitchen faucet 12,
Faucet 13 of the washstand and Karan / shower 14 of the bathroom,
Collectively called "general faucet" and "hot water supply from general faucet"
The term includes both the case where these are used singly and the case where they are used simultaneously. First, the water supplied from the water source is reduced in pressure by the pressure reducing valve 1 and flows into the hot water storage tank 2.
Hot water tank 2 is always full of water or hot water. When electric power is supplied to the heating element 3 using electric power or the like at midnight, the water in the hot water storage tank 2 is heated.

The boiling water temperature of the hot water tank 2 is controlled by the kitchen remote controller 1.
When the boiling water temperature sensor 4 detects the set boiling water temperature (for example, 90 ° C.), the control unit 15 stops the power supply to the heating element 3. During the heating, the water in the hot water storage tank 2 expands, and the expanded water is drained from the relief valve 5 serving as a safety device.

The temperature of hot water from a general faucet is set in advance by the kitchen remote controller 16 or the bathroom remote controller 17. Also, the faucet hot water temperature is set to an upper limit (for example, 60
° C) to prevent instantaneous burns.

Hot water supply operation from a common faucet For example, when the faucet 12 in the kitchen is opened, the control unit 21 controls the electric hot water mixing valve 6B for faucet hot water supply so as to have a set faucet hot water temperature, and the hot water tank 2 The hot water and the water inside are mixed at an appropriate temperature, and a correction is made to the faucet hot water supply electric hot water mixing valve 6B based on the input value of the faucet hot water temperature sensor 7B.

The temperature of hot water supplied to the bathtub 8 is set in advance by the bathroom remote controller 17. The hot water supply operation to the bathtub 8 includes four patterns of hot water, hot water, hot water, and pouring water.

[0029] In order to perform the hot water filling operation of hot water filling, first in the bathroom remote controller 17, press the hot water filling switch. As a result, a hot water filling command is output, and the control unit 21 controls the electric hot water mixing valve 6A for hot water supply so that the temperature detected by the hot water temperature sensor 7A becomes the hot water temperature set by the remote controller 17 in the bathroom. At the same time, the electromagnetic valve 9 is opened to start filling the bathtub 8 with hot water. After the filling of the bathtub 8 is started, the integrated flow rate is counted by the bathtub hot water supply flow rate sensor 10 and the filling is continued until the bath water amount set in advance by the bathroom remote controller 17 is reached. When the accumulated flow reaches the set bath water quantity, the solenoid valve 9
To complete the filling.

High-temperature hot-water supply operation To perform high-temperature hot-water supply when the temperature of hot water in the bathtub 8 has dropped, first press the high-temperature hot-water switch with the bathroom remote controller 17. As a result, a high-temperature hot water supply command is output, and the control unit 21 controls the electric bath / hot water mixing valve 6 so that the temperature detected by the bath water / hot water temperature sensor 7A becomes high (for example, 60 ° C.).
A is controlled, and the electromagnetic valve 9 is opened to start hot water supply to the bathtub 8. After starting hot water bathing in bathtub 8,
The accumulated flow rate is counted by the bathtub hot water supply flow rate sensor 10, and when the accumulated flow rate reaches a predetermined amount (for example, 20 L), the electromagnetic valve 9 is closed to complete hot water supply.

Addition hot water operation To add hot water when the amount of hot water in the bathtub 8 is reduced, first press the addition hot water switch on the bathroom remote controller 17. As a result, a command for adding hot water is output, and the control unit 21 controls the electric hot water mixing valve 6A for hot water supply so that the temperature detected by the hot water temperature sensor 7A becomes the hot water temperature set by the bathroom remote controller 17. At the same time, the solenoid valve 9 is opened to start adding hot water to the bathtub 8. After the addition of hot water to the bathtub 8, the integrated flow rate is counted by the bathtub hot water supply flow rate sensor 10, and when it reaches a certain amount (for example, 20 L), the electromagnetic valve 9 is closed to complete the hot water supply.

Water injection operation In order to perform water injection, first, a water injection switch is pressed by the bathroom remote controller 17. As a result, a water injection command is output and the control unit 2
1 controls the electric hot water mixing valve 6A for bathtub hot water supply to the full water side and controls the water supply from the water source directly.
The electromagnetic valve 9 is opened to start water injection into the bathtub 8. Bathtub 8
After the start of water injection into the bath, the integrated flow rate is counted by the bathtub hot water supply flow rate sensor 10, and when the flow reaches a certain amount (for example, 20 L), the electromagnetic valve 9 is closed to complete the water injection.

Here, for example, while hot water is supplied to the bathtub 8 at a hot water temperature of 60 ° C., for example, a hot water temperature of 40 ° C.
Assume that the general faucet set to ° C is opened. In the first embodiment, a hot-water mixing valve, that is, an electric hot-water mixing valve 6A for hot-water supply to a bathtub, is provided independently of a bathtub hot water supply pipe for supplying hot water to a bathtub and a general faucet hot water supply pipe for supplying hot water to a general faucet. Since the electric hot water supply mixing valve 6B for hot water supply is provided, the control unit 21 keeps the hot water supply temperature of 60 ° C. in the bathtub 8 while maintaining the faucet hot water temperature (40 ° C.). Electric hot water mixing valve 6B for faucet hot water supply
To mix the hot water and water in the hot water storage tank 2 at an appropriate temperature, and correct the faucet hot water supply electric hot water mixing valve 6B based on the input value of the faucet hot water temperature sensor 7B.

When a general faucet set to, for example, a hot water supply temperature of 40 ° C. is opened into the bathtub 8 at a water temperature of 10 ° C., for example, the control unit 21 injects water to the bathtub 8 at a water temperature of 10 ° C. While continuing, set faucet hot water temperature (40
° C) to control the faucet hot water supply electric hot water mixing valve 6B to mix the hot water and water in the hot water storage tank 2 at an appropriate temperature.
Based on the input value of the faucet hot water temperature sensor 7B, a correction is made to the faucet hot water supply electric hot water mixing valve 6B.

As described above, in the electric water heater of the first embodiment, even if the general faucet set to different hot water supply temperatures and the hot water supply to the bathtub 8 are performed at the same time, the fluctuation of the temperature and the waiting time for the hot water supply to the bathtub are performed. There is no convenience.

Embodiment 2 FIG. FIG. 2 shows claims 2 and 4 of the present invention.
FIG. 2 is a circuit diagram of a piping system showing the electric water heater according to FIG.

In FIG. 2, reference numerals 1 to 5, 8, 12 to 1
The members indicated by 4, 16 to 18 are basically the first members described above.
The description of the same components as those of the embodiment shown in FIG. 6C is an electric hot / water mixing valve for supplying hot water to the bathroom for adjusting the temperature of the hot water supplied to the bathtub 8 and the cull / shower 14 in the bathroom, and 7C is a hot water / hot water mixing valve for correcting the electric hot / water mixing valve 6C for supplying hot water to the bathroom. A sensor, 6B is a faucet hot water supply mixing valve for adjusting the temperature of hot water supplied to a general faucet to an appropriate temperature, 7B is a faucet hot water temperature sensor for correcting the faucet hot water mixing valve 6B, and 9 is a bathtub 8 A solenoid valve which is a bathtub hot-water supply opening / closing valve for opening and closing a hot-water supply circuit, and a bathroom hot-water supply flow sensor 10A for measuring a hot-water supply amount (mainly a hot-water supply amount to the bathtub 8) to the bathtub 8 and the curan / shower 14 in the bathroom.
11 is a faucet hot water supply flow rate sensor (or flow sensor) for detecting whether or not the general faucet is opened, 21 is a control unit for controlling the whole, and 33 is a pipe between the electric hot water mixing valve 6C for bathroom hot water supply and the solenoid valve 9. And a branch pipe connected to the callan / shower 14.

Next, the operation of the electric water heater according to the second embodiment will be described. Here, the kitchen faucet 12,
And the faucet 13 of the washbasin is collectively called "general faucet",
“Hot water supply from a common tap” includes both cases where these are used singly and cases where a plurality of them are used simultaneously. In addition, it is assumed that the water in hot water storage tank 2 has already been heated using midnight power or the like.

The temperature of hot water from a general faucet is set in advance by the kitchen remote controller 16 or the bathroom remote controller 17. Also, the faucet hot water temperature is set to an upper limit (for example, 60
° C) to prevent instantaneous burns.

Hot water supply operation from a general faucet For example, when the faucet 12 of the kitchen is opened, the control unit 21 controls the electric hot water mixing valve 6B for faucet hot water supply so that the temperature of the faucet hot water is set, and the hot water tank 2 The hot water and the water inside are mixed at an appropriate temperature, and a correction is made to the faucet hot water supply electric hot water mixing valve 6B based on the input value of the faucet hot water temperature sensor 7B.

The hot water temperature from the curan / shower 14 is
The setting of the kitchen remote controller 16 or the bathroom remote controller 17 is performed in advance, and the opening and closing of the faucet of the curan / shower 14 is notified to the controller 21 via the bathroom remote controller 17. At this time, the signal transmission from the curan / shower 14 to the bathroom remote controller 17 can be performed by wire or wirelessly (infrared ray). The temperature of hot water supplied to bathtub 8 is set in advance by bathroom remote controller 17. Furthermore, the maximum temperature (for example, 60 ° C.) is set for the maximum set hot water temperature from the hot water / shower 14 so as to prevent instantaneous burns. The hot water supply operation to the bathtub 8 includes four patterns of hot water, hot water, hot water, and pouring water.

Hot water supply operation from the bathroom curan / shower When the curan / shower 14 is opened, an open signal is output to the bathroom remote controller 17. When the bathroom remote controller 17 receives the open signal from the callan / shower 14, the control signal is sent to the control unit 2.
Tell 1 Then, the control unit 21 controls the electric hot / water mixing valve 6C for bathroom hot water supply so as to have the set hot water temperature, and mixes the hot water and water in the hot water storage tank 2 with an appropriate temperature.
Based on the input value of the bathroom hot water temperature sensor 7C, correction is applied to the bathroom hot water mixing valve 6C. If the opening operation of the curan / shower 14 is performed during hot water supply to the bathtub 8, the hot water supply to the curan / shower 14 is prioritized, and the hot water temperature from the curan / shower 14 is set. Has become.

To perform the filling operation , first, a filling switch is pressed by the bathroom remote controller 17. As a result, a hot water filling command is output, and the control unit 21 controls the electric hot water mixing valve 6C for bathroom hot water supply so that the temperature detected by the bathroom hot water temperature sensor 7C becomes the bath hot water temperature set by the bathroom remote control 17. At the same time, the electromagnetic valve 9 is opened to start filling the bathtub 8 with hot water. After the filling of the bathtub 8 is started, the accumulated flow rate is counted by the bathroom hot water supply flow rate sensor 10A, and the bathing is continued until the bath water amount set in advance by the bathroom remote controller 17 is reached.
When the accumulated flow reaches the set bath water amount, the solenoid valve 9 is closed to complete the filling.

High-temperature hot-water supply operation To perform high-temperature hot-water supply when the temperature of hot water in the bathtub 8 has dropped, first press the high-temperature hot-water switch with the bathroom remote controller 17. As a result, a high-temperature hot water supply command is output, and the control unit 21 causes the bathroom hot-water supply electric hot water mixing valve 6 so that the detection temperature of the bathroom hot-water supply temperature sensor 7C becomes high (for example, 60 ° C.).
While controlling C, the electromagnetic valve 9 is opened to start hot water supply to the bathtub 8. After starting hot water bathing in bathtub 8,
The accumulated flow rate is counted by the bathroom hot water supply flow rate sensor 10A, and when the accumulated flow rate reaches a certain amount (for example, 20 L), the electromagnetic valve 9 is closed to complete the hot water supply.

Addition hot water operation To add hot water when the amount of hot water in the bathtub 8 is reduced, first press the addition hot water switch on the bathroom remote controller 17. As a result, a command for adding hot water is output, and control unit 21 controls electric hot water mixing valve 6C for bathroom hot water supply so that the temperature detected by bathroom hot water temperature sensor 7C becomes the bath hot water temperature set by bathroom remote controller 17. At the same time, the solenoid valve 9 is opened to start adding hot water to the bathtub 8. After adding hot water to the bathtub 8 is started, the integrated flow rate is counted by the bathroom hot water supply flow rate sensor 10A,
When a certain amount (for example, 20 L) is reached, the solenoid valve 9 is closed to complete the addition.

Water injection operation In order to perform water injection, first, a water injection switch is pressed by the bathroom remote controller 17. As a result, a water injection command is output and the control unit 2
1 controls the electric hot water mixing valve 6C for bathroom hot water supply to fully open the water side, and controls so as to directly supply the water of the water source;
The electromagnetic valve 9 is opened to start water injection into the bathtub 8. Bathtub 8
After the start of water injection into the bath, the accumulated flow rate is counted by the bathroom hot water supply flow rate sensor 10A, and when the accumulated flow rate reaches a certain amount (for example, 20 L), the electromagnetic valve 9 is closed to complete the water injection.

Here, for example, while hot water is being supplied to the bathtub 8 at a hot water temperature of 60 ° C., for example, or during use of the curan / shower 14 set at a hot water temperature of 42 ° C., for example, hot water is supplied. It is assumed that a general faucet set to a hot water temperature of 40 ° C. is opened. In the second embodiment, a hot water mixing valve, that is, an electric hot water mixing valve 6C for hot water supply to a bathroom, is provided independently of a bathroom hot water supply pipe supplying hot water to a bathroom and a general faucet hot water supply pipe supplying hot water to a general faucet. Since the electric hot water mixing valve 6B for hot water supply is provided, the control unit 21 continues to supply hot water at a hot water temperature of 60 ° C. to the bathtub 8 or a hot water temperature of 42 ° C. to the curan / shower 14. The electric hot water mixing valve 6B for faucet hot water supply is controlled so that the temperature of the faucet hot water (40 ° C.) is kept as it is, and the hot water and water in the hot water storage tank 2 are mixed at an appropriate temperature. 7
Based on the input value of B, the electric hot water mixing valve 6B for faucet hot water supply is corrected.

When a general faucet set at, for example, a hot water supply temperature of 40 ° C. is opened while pouring water into the bath 8, for example, at a temperature of 10 ° C., the control unit 21 injects water into the bath 8 at a temperature of 10 ° C. While continuing, set faucet hot water temperature (40
° C) to control the faucet hot water supply electric hot water mixing valve 6B to mix the hot water and water in the hot water storage tank 2 at an appropriate temperature.
Based on the input value of the faucet hot water temperature sensor 7B, a correction is made to the faucet hot water supply electric hot water mixing valve 6B.

As described above, in the electric water heater of the second embodiment, the temperature does not fluctuate even when the general faucet and the hot water supply to the bathroom curan / shower are simultaneously performed in addition to the general faucet and bathtub hot water supply. Usability is further improved.

Embodiment 3 FIG. FIG. 3 shows claims 3 and 4 of the present invention.
FIG. 2 is a circuit diagram of a piping system showing the electric water heater according to FIG.

In FIG. 3, reference numerals 1 to 5, 8, 12 to 1
The members indicated by 4, 16 to 18 are basically the first members described above.
The description of the same components as those of the embodiment shown in FIG. 6C is an electric hot / water mixing valve for supplying hot water to the bathroom for adjusting the temperature of the hot water supplied to the bathtub 8 and the cull / shower 14 in the bathroom, and 7C is a hot water / hot water mixing valve for correcting the electric hot / water mixing valve 6C for supplying hot water to the bathroom. A sensor, 6B is a faucet hot water supply mixing valve for adjusting the temperature of hot water supplied to the general faucet to an appropriate temperature, 7B is a faucet hot water temperature sensor for correcting the faucet hot water supply mixing valve 6B, and 9 is a bathtub 8 A solenoid valve which is a bathtub hot-water supply opening / closing valve for opening and closing a hot-water supply circuit, and a bathroom hot-water supply flow sensor 10A for measuring a hot-water supply amount (mainly a hot-water supply amount to the bathtub 8) to the bathtub 8 and the curan / shower 14 in the bathroom.
11 is a faucet hot water supply flow rate sensor (or flow sensor) for detecting whether or not the general faucet is opened, 21 is a control unit for controlling the whole control, and 42 is branched from the bathtub hot water supply pipe and connected to the callan / shower 14. The branch pipe 43 is provided at the branch point, and when the callan / bathroom shower 14 is used,
This is a three-way valve that is a hot water supply switching unit that switches the hot water supply destination to the side of the shower / bath 14.

Next, the operation of the electric water heater according to the third embodiment will be described. The kitchen faucet 12,
And the faucet 13 of the washbasin is collectively called "general faucet",
“Hot water supply from a common tap” includes both cases where these are used singly and cases where a plurality of them are used simultaneously. In addition, it is assumed that the water in hot water storage tank 2 has already been heated using midnight power or the like.

The temperature of hot water from a general faucet is set in advance by the kitchen remote controller 16 or the bathroom remote controller 17. Also, the faucet hot water temperature is set to an upper limit (for example, 60
° C) to prevent instantaneous burns.

Hot water supply operation from general faucet When, for example, the faucet 12 of the kitchen is opened, the control unit 21 controls the electric hot water mixing valve 6B for faucet hot water supply so that the set faucet hot water temperature is set, and the hot water tank 2 The hot water and the water inside are mixed at an appropriate temperature, and a correction is made to the faucet hot water supply electric hot water mixing valve 6B based on the input value of the faucet hot water temperature sensor 7B.

The temperature of hot water from the curan / shower 14 is
The setting of the kitchen remote controller 16 or the bathroom remote controller 17 is performed in advance, and the opening and closing of the faucet of the curan / shower 14 is notified to the controller 21 via the bathroom remote controller 17. At this time, the signal transmission from the curan / shower 14 to the bathroom remote controller 17 can be performed by wire or wirelessly (infrared ray). The temperature of hot water supplied to bathtub 8 is set in advance by bathroom remote controller 17. Furthermore, the maximum temperature (for example, 60 ° C.) is set for the maximum set hot water temperature from the hot water / shower 14 so as to prevent instantaneous burns. The hot water supply operation to the bathtub 8 includes four patterns of hot water, hot water, hot water, and pouring water.

Hot water supply operation from bathroom cull / shower When the cull / shower 14 is opened, an open signal is output to the bathroom remote controller 17. When the bathroom remote controller 17 receives the open signal from the callan / shower 14, the control signal is sent to the control unit 2.
Tell 1 Then, the control unit 21 opens the electromagnetic valve 9 and switches the three-way valve 43 to the side of the callan / shower 14. Next, the electric hot water mixing valve 6C for hot water supply in the bathroom is controlled so as to have the set hot water temperature, and the hot water in the hot water storage tank 2 is mixed with water at an appropriate temperature.
Based on the input value of C, the electric hot water mixing valve 6C for hot water supply in the bathroom is corrected. If the opening operation of the curan / shower 14 is performed during hot water supply to the bathtub 8, the hot water supply to the curan / shower 14 is prioritized, and the hot water temperature from the curan / shower 14 is set. Has become.

[0057] In order to perform the hot water filling operation of hot water filling, first in the bathroom remote controller 17, press the hot water filling switch. As a result, a hot water filling command is output, and the control unit 21 opens the solenoid valve 9 and switches the three-way valve 43 to the bathtub 8 side. Next, the electric hot water mixing valve 6C for bathroom hot water supply is controlled so that the detected temperature of the bathroom hot water temperature sensor 7C becomes the bath hot water temperature set by the bathroom remote control 17,
The filling of the bath 8 is started. After the filling of the bathtub 8 is started, the accumulated flow rate is counted by the bathroom hot water supply flow rate sensor 10A, and the bathing is continued until the bath water amount set in advance by the bathroom remote controller 17 is reached. If the integrated flow rate is
When the set bath water amount is reached, the solenoid valve 9 is closed to complete the filling.

High-temperature hot water supply operation To perform high-temperature hot water supply when the temperature of the hot water in the bathtub 8 has dropped, first press the hot water hot water switch on the bathroom remote controller 17. As a result, a high-temperature hot water supply command is output, and the control unit 21 opens the solenoid valve 9 and sets the three-way valve 43 in the bathtub 8.
Switch to the side. Next, the electric hot water mixing valve 6C for bathroom hot water supply is controlled so that the detected temperature of the bathroom hot water temperature sensor 7C becomes high temperature (for example, 60 ° C.), and hot water supply to the bathtub 8 is started. After the high-temperature hot water supply to the bathtub 8 is started, the accumulated flow rate is counted by the bathroom hot water supply flow rate sensor 10A, and when the accumulated flow reaches a certain amount (for example, 20 L), the electromagnetic valve 9 is closed to complete the high-temperature hot water supply.

[0059] To add perform the hot water added when the amount of hot water in the hot water behavior tub 8 has decreased, first in the bathroom remote controller 17, press the hot water switch added. As a result, a command for adding hot water is output, and the control unit 21
Is opened, and the three-way valve 43 is switched to the bathtub 8 side. Next, the electric hot water mixing valve 6C for bathroom hot water supply is controlled such that the detected temperature of the bathroom hot water temperature sensor 7C becomes the bath hot water temperature set by the bathroom remote controller 17, and the hot water supply to the bathtub 8 is started. After the start of hot water supply to the bathtub 8, the accumulated flow rate is counted by the bathroom hot water supply flow rate sensor 10A. When the flow rate reaches a predetermined amount (for example, 20 L), the solenoid valve 9 is closed to complete the hot water supply.

Water injection operation In order to perform water injection, first, a water injection switch is pressed by the bathroom remote controller 17. As a result, a water injection command is output and the control unit 2
1 opens the electromagnetic valve 9 and switches the three-way valve 43 to the bathtub 8 side. Next, the electric hot water mixing valve 6C for bathroom hot water supply is opened to the full water side, and control is performed so as to directly supply water from the water source, and water injection into the bathtub 8 is started. After the start of water injection into the bathtub 8, the accumulated flow rate is counted by the bathroom hot water supply flow rate sensor 10A, and when the accumulated flow rate reaches a certain amount (for example, 20 L), the electromagnetic valve 9 is closed to complete the water injection.

Here, for example, while hot water is being supplied to the bathtub 8 at a hot water temperature of 60 ° C., or while the curan / shower 14 set at a hot water temperature of 42 ° C. is in use, for example, hot water is supplied. It is assumed that a general faucet set to a hot water temperature of 40 ° C. is opened. In the third embodiment, a hot water mixing valve, that is, an electric hot water mixing valve 6C for bathroom hot water supply, is provided independently of a bathroom hot water supply pipe for supplying hot water to a bathroom and a general faucet hot water supply pipe for supplying hot water to a general faucet. Since the electric hot water mixing valve 6B for hot water supply is provided, the control unit 21 continues to supply hot water at a hot water temperature of 60 ° C. to the bathtub 8 or a hot water temperature of 42 ° C. to the curan / shower 14. The electric hot water mixing valve 6B for faucet hot water supply is controlled so that the temperature of the faucet hot water (40 ° C.) is kept as it is, and the hot water and water in the hot water storage tank 2 are mixed at an appropriate temperature. 7
Based on the input value of B, the electric hot water mixing valve 6B for faucet hot water supply is corrected.

Further, when a general faucet set at, for example, a hot water supply temperature of 40 ° C. is opened into the bathtub 8 at a water temperature of 10 ° C., for example, the control unit 21 injects water at a water temperature of 10 ° C. into the bathtub 8. While continuing, set faucet hot water temperature (40
° C) to control the faucet hot water supply electric hot water mixing valve 6B to mix the hot water and water in the hot water storage tank 2 at an appropriate temperature.
Based on the input value of the faucet hot water temperature sensor 7B, a correction is made to the faucet hot water supply electric hot water mixing valve 6B.

As described above, in the electric water heater according to the third embodiment, the temperature does not fluctuate even when the hot water is supplied not only to the general faucet and the bathtub but also to the general faucet and the bathroom curan / shower at the same time. Usability is improved.

Although the electromagnetic valve 9 has been described as an example between the three-way valve 43 and the electric hot water mixing valve 6C for supplying hot water in the hot water supply pipe in the hot water supply pipe, the electromagnetic valve 9 is not necessarily required. Instead, they can be deleted. In this case, the configuration of the control unit 21 is simplified.

[0065]

As described above, according to the first aspect of the present invention, a plurality of hot water mixing means for mixing the hot water boiled in the hot water storage tank and the water supplied from the water source are provided. At least one is connected to a bathtub hot water supply pipe that supplies hot water mixed at an appropriate temperature to a bathtub, and at least another is connected to a general faucet hot water supply pipe that supplies hot water mixed at an appropriate temperature to a general faucet. Since the hot water supply to the general faucet and the bathtub can be performed independently, there is no temperature fluctuation and no waiting for the bathtub hot water even if the hot water supply to the general faucet and the bathtub is performed simultaneously.
Usability can be improved and safety can be easily ensured.

According to the second aspect of the present invention, a plurality of hot water mixing means for mixing the hot water boiled in the hot water storage tank and the water supplied from the water source are provided, and at least one of these hot water mixing means is provided. Connect to a general faucet hot water supply pipe that supplies hot water mixed at an appropriate temperature to a general faucet, and connect at least one other to a bathtub hot water supply pipe that supplies hot water mixed at an appropriate temperature to a bathtub through a bathtub hot water supply opening / closing valve. A branch pipe connected to a bathroom curan / shower is connected to a pipe between the hot-water mixing means on the bathtub side and the bathtub hot-water supply opening / closing valve to supply hot water to the general faucet and bathtub, or a general faucet and bathroom curan / shower. The hot water supply to the common faucet and bathtub, or the general faucet and bathroom curan / shower can be performed simultaneously, so that there is no temperature fluctuation or waiting for hot water in the bathtub. , It is possible to a further improved usability, it is easy to ensure safety.

According to the third aspect of the present invention, a plurality of hot water mixing means for mixing the hot water boiled in the hot water tank and the water supplied from the water source are provided, and at least one of the hot water mixing means is provided. The hot water mixed at a suitable temperature is connected to a general faucet hot water supply pipe for supplying to a general faucet, and at least another one is connected to a bathtub hot water supply pipe for supplying a hot water mixed at an appropriate temperature to a bathtub, and the bathtub hot water supply pipe is connected. On the way, a branch pipe connected to the bathroom curan / shower is connected, and at the branch point, when the bathroom curan / shower is used, hot water supply switching means for switching the hot water supply destination to the bathroom curan / shower side is provided, and a general faucet is provided. And the hot water supply to the bathtub, or the general faucet and the bathroom curan / shower, can be performed independently, so the general faucet and bathtub or the general faucet and bathroom curan / shaw Even if hot water to over is performed at the same time, without waiting for the temperature fluctuations and bath hot water, it is possible to improve the usability, it becomes easy to ensure safety. Further, up to the three-way valve in the bathroom, only one pipe for hot water supply to the bathtub and for the bathroom cull / shower can be used, thereby saving labor in the construction.

According to the fourth aspect of the present invention, there is provided means for independently setting the hot water supply temperature to the bathtub and the hot water supply temperature to the general faucet. Even when hot water is supplied to the faucet at the same time, the hot water temperature setting means controls hot water supply according to each set hot water temperature, so that the configuration of the hardware such as each hot water mixing means can be effectively utilized.

[Brief description of the drawings]

FIG. 1 is a circuit diagram of a piping system showing an electric water heater according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram of a piping system showing an electric water heater according to a second embodiment of the present invention.

FIG. 3 is a circuit diagram of a piping system showing an electric water heater according to a third embodiment of the present invention.

FIG. 4 is a circuit diagram of a piping system showing a conventional electric water heater.

[Explanation of symbols]

2 Hot water tank, 3 heating element (heating means), 6A electric hot water mixing valve for hot water supply (hot water mixing means), 6B electric hot water mixing valve for hot water supply (hot water mixing means), 6C Electric hot water mixing valve for hot water supply in bathroom (hot water) Mixing means), 7A bathtub hot water temperature sensor, 7B faucet hot water temperature sensor, 7C bathroom hot water temperature sensor, 8 bathtub, 9 solenoid valve (bathwater hot water on / off valve), 1
0 bathtub hot water flow sensor, 10A bathroom hot water flow sensor, 11 faucet hot water flow sensor, 12 kitchen faucet (general faucet), 13 wash faucet (general faucet), 14 bathroom curan and shower, 16 kitchen remote control, 17 bathroom remote control, 21 control part, 33, 42 branch piping, 43 three-way valve (hot water supply switching means).

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Akihiko Kobayashi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Within Mitsubishi Electric Corporation (72) Inventor Tadashi Masuda 3-2-2 Nakanoshima, Kita-ku, Osaka Kansai Inside Power Corporation (72) Inventor Yoshihide Mori 3-2-2 Nakanoshima, Kita-ku, Osaka-shi Inside Kansai Electric Power Corporation (72) Inventor Tatsuya Okui 3-2-2 Nakanoshima, Kita-ku, Osaka Kansai Electric Riki Co., Ltd.

Claims (4)

[Claims] 1. An electric water heater having a heating means for heating and raising the temperature of water and a hot water storage tank for storing the heated hot water, wherein the hot water boiled in the hot water storage tank is mixed with water supplied from a water source. A plurality of hot and cold water mixing means are provided, and at least one of these hot and cold water mixing means is connected to a bathtub hot water supply pipe for supplying hot water mixed at an appropriate temperature to a bathtub, and at least one other hot and cold water mixing means is provided.
One is an electric water heater characterized by being connected to a general faucet hot water supply pipe for supplying hot water mixed at an appropriate temperature to a general faucet. 2. An electric water heater having a heating means for heating and raising the temperature of water and a hot water tank for storing the heated hot water, wherein the hot water boiled in the hot water tank is mixed with water supplied from a water source. A plurality of hot and cold water mixing means are provided, and at least one of these hot and cold water mixing means is connected to a general faucet hot water supply pipe for supplying hot water mixed at an appropriate temperature to a general faucet, and at least one other is mixed at an appropriate temperature. Hot water is supplied to the bathtub through a bathtub hot-water supply opening / closing valve, and is connected to a bathtub hot-water mixing means on the bathtub side and a piping between the bathtub hot-water supply opening / closing valve, and a branch pipe connected to a bathroom curan / shower. An electric water heater characterized by being connected to a water heater. 3. An electric water heater having a heating means for heating and raising the temperature of water and a hot water tank for storing heated hot water, wherein the hot water boiled in the hot water tank is mixed with water supplied from a water source. A plurality of hot and cold water mixing means are provided, and at least one of these hot and cold water mixing means is connected to a general faucet hot water supply pipe for supplying hot water mixed at an appropriate temperature to a general faucet, and at least one other is mixed at an appropriate temperature. Connected to a bathtub hot water supply pipe that supplies hot water to the bathtub, and a branch pipe connected to a bathroom curan / shower is connected in the middle of the bathtub hot water pipe, and the bathroom curan / shower is used at the branch point. An electric water heater comprising hot water supply switching means for switching a hot water supply destination to the bathroom curan / shower side when hot water is supplied. 4. A means for independently setting a hot water supply temperature to a bathtub and a hot water supply temperature to a general faucet, wherein the means comprises:
Even if hot water supply to the bathtub and hot water to the general faucet are performed at the same time,
The electric water heater according to any one of claims 1 to 3, wherein hot water supply is controlled according to each set hot water temperature.