JP3561132B2 - Electric water heater - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an electric water heater for supplying hot water by controlling the temperature of hot water.
[0002]
[Prior art]
FIG. 1 is a configuration diagram of an electric water heater according to the present invention. Since the configuration of the conventional technology is almost the same, the configuration of the conventional electric water heater will be described below using the configuration diagram according to the present invention. First, the electric hot water mixing valve 4 is controlled to adjust the amount of hot water in the hot water tank 1 and the amount of water from the water source, and the temperature detected by the second temperature sensor 21 is set in advance by the kitchen remote controller 22 or the bathroom remote controller 23. Keep the hot water temperature. In this way, the hot water which has reached the set temperature passes through the mixing hot-water supply pipe 12 and is supplied from hot-water mixing taps 5 and 6 provided in the kitchen and the bathroom.
[0003]
The hot water supply operation will be described with reference to the flowchart of FIG. 5. When the initial power is turned on, the priority of determining the hot water supply temperature is in the bathroom remote controller 23. For example, the hot water temperature is set to 50 ° C. and the water mixing taps 5, 6 are opened. Then, hot water at 50 ° C. is supplied (step S-20).
Next, when the priority switch 24 of the kitchen remote controller 22 is pressed (step S-21), the hot water temperature becomes the set temperature of the kitchen remote controller 22. In this example, the hot water temperature remains at 50 ° C. (step S-22).
Next, the kitchen remote controller 22 is operated to change the hot water temperature from 50 ° C. to, for example, 70 ° C. (step S-23). Then, the hot water temperature becomes 70 ° C., and the temperature of the hot water coming out of the hot and cold water mixing taps 5, 6 becomes 70 ° C. (step S-24).
[0004]
Next, the priority switch 25 of the bathroom remote controller 23 is pressed (step S-25). Then, the hot water temperature becomes the set temperature of the bathroom remote controller 23, and changes from 70 ° C to 50 ° C (step S-26).
Next, the priority switch 24 of the kitchen remote controller 22 is pressed (step S-27). Then, the hot water temperature becomes the set temperature of the kitchen remote controller 22 and changes from 50 ° C to 70 ° C (step S-28).
[0005]
[Problems to be solved by the invention]
According to the electric water heater configured as described above, the hot water supply temperature changes when the priority is moved, and the hot water temperature fluctuates suddenly.
In addition, a thermostatic mixer tap is often used as the mixer tap 6 on the bathroom side. One of the characteristics of the mixer tap side is that the temperature of the hot water supplied to the mixer tap is 5 ° C. to 10 ° C. higher than the actually used hot water temperature. Since the temperature of the hot water is stabilized by increasing the temperature, it is not desired to change the temperature of the hot water when the shower water is used. However, there has been a usability problem such that the hot water temperature is easily changed in a kitchen or the like, and it is necessary to shift the priority to the bathroom side to return to the set temperature of the bathroom.
[0006]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and has as its object to provide an electric water heater having a control function of a hot water supply temperature with little fluctuation of the hot water supply temperature.
[0007]
[Means for Solving the Problems]
Electric water heater according to the present invention comprises a hot water tank to keep the reservoir by heating water, and an electric hot and cold water mixing valve for mixing the water hot water heated by the hot water storage tank, is sent from the electric hot and cold water mixing valve A temperature sensor for detecting the temperature of the mixed hot and cold water and a priority switch for setting the temperature, and a bathroom remote control and a kitchen remote control for switching the priority for setting the hot water temperature of the electric hot water mixing valve by operating the priority switch; A control unit for receiving a signal from the sensor, the bathroom remote control, and the kitchen remote control, and controlling a hot water temperature of the electric hot water mixing valve, and among the bathroom remote control and the kitchen remote control, the bathroom remote control sets the hot water temperature when the power is turned on. has priority, also kitchen remote controller is operated, if the priority hot-water supply water temperature is switched from the bathroom remote controller in the kitchen remote controller is changed, the hot water temperature of the electric hot and cold water mixing valve Previous right is set to the set temperature of the hot water supply water temperature of switched kitchen remote control but, after a predetermined time has elapsed, returns the hot water temperature to the set temperature of the hot water supply water bath remote control with priority temperature to be set at power up Is set.
[0008]
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 a temperature and flow rate of the mixed hot water sent from the electric hot water mixing valve. A bathroom remote control and a kitchen remote control , each of which has a temperature sensor and a water flow detecting means for detecting the temperature of the water, and a temperature setting priority switch, and switches the priority of setting the hot water temperature of the electric hot water mixing valve by operating the priority switch. sensor receives a signal from the water flow detection means and bathroom remote controller and kitchen remote control, and a control unit for controlling the hot water temperature of the electric hot and cold water mixing valve, of the bathroom remote controller and kitchen remote control, bathroom remote control at power-on hot water has priority for setting the temperature, also the kitchen remote controller is operated, if the priority hot-water supply water temperature is switched from the bathroom remote controller in the kitchen remote controller is changed, the electric Although hot water temperature of the water mixing valve is set to a set temperature of the hot water supply water temperature in the kitchen remote controller is switched priority, after the water flow detecting termination by water flow detection means has priority for setting the hot water temperature when the power is turned on The setting is returned to the set temperature of the hot water supply temperature of the bathroom remote controller.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Embodiment 1
FIG. 1 is a configuration diagram of an electric water heater according to Embodiment 1 of the present invention. Reference numeral 1 denotes a hot water storage tank for storing water or hot water, and 2 denotes a heating element provided at a lower portion in the hot water storage tank 1 to heat water in the hot water storage tank 1 and boil it. Reference numeral 3 denotes a first temperature sensor provided on the outer periphery of the lower part of the hot water tank 1 and detecting a boiling state of water in the hot water tank 1.
Reference numeral 4 denotes an electric hot water mixing valve for changing the mixing ratio of water and hot water by electric control to produce hot water at an appropriate temperature. 5 is a kitchen hot water mixer tap attached to the kitchen, 6 is a bathroom hot water mixer tap installed in the bathroom, the kitchen hot water mixer tap 5 uses, for example, a one-lever type, and the bathroom hot water mixer tap 6 is, for example, a thermostat mixer tap. You are using
[0013]
A hot water supply pipe 7 has one end mounted on the upper portion of the hot water tank 1 and the other end mounted on a hot water supply port of the electric hot water mixing valve 4 to supply hot water boiled in the hot water storage tank 1 to the electric hot water mixing valve 4. One end is connected to a water source such as a water pipe, and the other end is attached to a water supply port of the electric hot water mixing valve 4 to supply water from the water source to the electric hot water mixing valve 4. Reference numeral 11 denotes a hot water tank water supply pipe for supplying water in the hot water pipe 10 into the hot water tank 1, and is branched from the water supply pipe 10 and attached to a lower portion of the hot water tank 1.
[0014]
Reference numeral 12 denotes a mixing hot water supply pipe having one end attached to a mixing hot water outlet of the electric hot water mixing valve 4. Reference numerals 13 and 14 are branched from the mixing hot water supply pipe 12 and attached to the kitchen hot water mixing tap 5 and the bathroom hot water mixing tap 6, respectively. Kitchen hot water pipe and bathroom hot water pipe. Reference numeral 15 denotes a mixer tap water supply pipe branched from the water supply pipe 10, and reference numerals 16 and 17 denote branch pipes from the mixer tap water supply pipe 15 and end portions thereof attached to the kitchen hot water mixer tap 5 and the bathroom hot water mixer tap 6, respectively, and a bathroom water supply pipe. Tube.
[0015]
Reference numeral 18 denotes a pressure reducing valve attached to the hot water supply pipe 11 to reduce the pressure of the water source, and 19 denotes a relief valve attached to the hot water supply pipe 7 near the upper portion of the water storage tank 1 for releasing hot water in the hot water storage tank 1 which has expanded during boiling. It is.
Reference numeral 20 denotes a water flow detecting means for detecting the flow rate of the mixed hot water flowing in the mixed hot water supply pipe 12. Reference numeral 21 denotes a water flow detecting means attached to the mixed hot water supply pipe 12 for temperature correction by the electric hot water mixing valve 14. It is a second temperature sensor for detecting a temperature.
[0016]
Reference numeral 22 denotes a kitchen remote control mounted near the kitchen hot water mixing tap 5, and reference numeral 23 denotes a bathroom remote control mounted near the bathroom hot water mixing tap 6. Reference numeral 24 denotes a kitchen remote control priority switch operated when giving priority to the kitchen remote control 22, and 25 denotes a bathroom remote control priority switch which is operated when giving priority to the bathroom remote control 23. The priority can be given to the remote controller on the pressed side. Therefore, the hot water temperature can be changed only from the remote controller having the priority, and the hot water temperature cannot be changed from the remote controller having no priority.
[0017]
Reference numeral 26 denotes a control device for controlling the entire electric water heater, which receives signals from the first and second temperature sensors 3 and 21, the water flow detecting means 20, the kitchen remote controller 22, and the bathroom remote controller 23, as well as the heating element 2, electric hot water It controls the mixing valve 4 and the like. In the control device 26, the bathroom remote controller 23 has priority over the kitchen remote controller 22. Even when the hot water temperature is changed by the kitchen remote controller 22 having the priority, the bathroom remote controller 23 is controlled by the bathroom remote controller 23 after a certain period of time. It returns to the set temperature.
[0018]
That is, when the priority is switched from the bathroom remote controller 23 to the kitchen remote controller 22, after a certain period of time, the hot water temperature is returned to the set temperature of the bathroom remote controller 23, but the priority is switched from the kitchen remote controller 22 to the bathroom remote controller 23. When switching, the hot water temperature is switched to the temperature set in the bathroom remote controller 23. The priority at the time of turning on the power is on the bathroom remote controller 23 side. The bathroom remote controller 23 can change the hot water temperature, but the kitchen remote controller 22 cannot change the hot water temperature.
[0019]
The operation of the first embodiment configured as described above will be described with reference to FIG. The water sent from the water source to the hot water tank water supply pipe 11 is decompressed through the pressure reducing valve 18 and flows into the hot water tank 1 to keep the inside of the hot water tank 1 always full. In this state, when the heating element 2 is energized using, for example, midnight power, the water in the hot water storage tank 1 is heated. Then, when the first temperature sensor 3 detects a preset boiling temperature, the energization of the heating element 2 is stopped. The hot water in the hot water storage tank 1 expanded by heating is drained from the relief valve 19.
[0020]
The hot water and water source water stored in the hot water storage tank 1 thus pass through the hot water supply pipe 7 and the water supply pipe 10 to reach the electric hot water mixing valve 4, where the second temperature sensor attached to the mixed hot water supply pipe 12 is used. The mixing ratio of hot water and water is controlled such that the detected temperature of 21 becomes a temperature preset by the kitchen remote controller 22 (or the bathroom remote controller 23). At this time, the water flow detecting means 20 detects whether or not hot water is flowing through the mixing hot water supply pipe 12, and feeds back to the electric hot and cold water mixing valve 4 based on the temperature detected by the second temperature sensor 21 only when the hot water flow is detected. Perform control.
[0021]
In determining the temperature of hot and cold water detected by the second temperature sensor 21, when the kitchen priority switch 24 is pressed, the kitchen remote control 22 can be given a priority. The temperature can be changed, and it is not possible to change the hot water temperature from the bathroom remote controller 23 having no priority. When the bathroom priority switch 25 is pressed, the bathroom remote control 23 can be given a priority, the hot water temperature can be changed only from the bathroom remote control 23, and the kitchen remote control 22 without the priority can be given. Can not change the hot water temperature. The mixed hot water having the desired temperature in this way is supplied through the hot water mixing pipes 5 and 6 through the mixing hot water supply pipe 12.
[0022]
The above operation will be described in more detail with reference to the flowchart of FIG. First, when the initial power is turned on, the priority when the power is turned on is on the bathroom remote controller 23 side. When the power is turned on, for example, the hot water temperature is set to 50 ° C.
Thus, the priority of the bathroom remote controller 23 is turned ON, the current hot water temperature becomes 50 ° C., and the set value of the hot water temperature becomes 50 ° C. On the other hand, the priority of the kitchen remote controller 22 is turned off, and the current hot water temperature becomes 50 ° C. (step S-1). Thus, since the priority at the time of turning on the power is on the bathroom remote control 23 side, the hot water temperature can be changed from the bathroom remote control 23 side, but the hot water temperature cannot be changed from the kitchen remote control 22 side. Thus, when the kitchen hot water mixing tap 5 and the bathroom hot water mixing tap 6 are opened, hot water of 50 ° C. is supplied from here.
[0023]
Next, when the priority switch 24 of the kitchen remote controller 22 is pressed (step S-2), the priority shifts from the bathroom remote controller 23 to the kitchen remote controller 22. Thus, the priority of the bathroom remote controller 23 is turned off, the current hot water temperature is 50 ° C., and the set value of the hot water temperature is 50 ° C. On the other hand, the priority of the kitchen remote controller 22 is turned ON, and the current hot water temperature becomes 50 ° C. (step S-3). In this way, the priority has been shifted to the kitchen remote control 22 side, so that the hot water temperature can be changed from the kitchen remote control 22, but the hot water temperature cannot be changed from the bathroom remote control 23 side. Thus, when the kitchen hot water mixing tap 5 and the bathroom hot water mixing tap 6 are opened, hot water of 50 ° C. is supplied from here.
[0024]
Next, when the kitchen remote controller 22 is operated to change the hot water temperature from 50 ° C. to, for example, 70 ° C. (step S-4), the priority of the bathroom remote controller 23 is turned off, and the current hot water temperature is 70 ° C. And the set value of the hot water temperature is 50 ° C. On the other hand, the priority of the kitchen remote control 22 is ON, and the current hot water temperature becomes 70 ° C. (step S-5). In this state, since the priority is given to the kitchen remote control 22 side, the hot water temperature can be changed from the kitchen remote control 22 side, but the hot water temperature cannot be changed from the bathroom remote control 23 side. Thus, the hot water temperature becomes 70 ° C., and the temperatures of the hot water supplied from the kitchen hot water mixing tap 5 and the bathroom hot water mixing tap 6 both become 70 ° C.
[0025]
After the hot water temperature is changed to 70 ° C. by the kitchen remote controller 22, for example, it is checked whether or not 10 minutes have elapsed (step S-6). When 10 minutes have passed, the hot water temperature is automatically returned to 50 ° C. Therefore, the priority of the bathroom remote controller 23 is OFF, the current hot water temperature is 50 ° C., and the set value of the hot water temperature is 50 ° C. On the other hand, the priority of the kitchen remote control 22 is ON, and the current hot water temperature becomes 50 ° C. (step-7). Thus, the hot water temperature returns to 50 ° C., and the temperatures of the hot water supplied from the kitchen hot water mixing tap 5 and the bathroom hot water mixing tap 6 both become 50 ° C.
[0026]
Next, when the priority switch 25 of the bathroom remote controller 23 is pressed (step-8), the priority is transferred from the kitchen remote controller 22 to the bathroom remote controller 23. Thereby, the priority of the bathroom remote controller 23 is turned ON, the current hot water temperature is 50 ° C., and the set value of the hot water temperature is 50 ° C. On the other hand, the priority of the kitchen remote control 22 is turned off, and the current hot water temperature becomes 50 ° C. Since the priority has been transferred to the bathroom remote controller 23, the hot water temperature can be changed from the bathroom remote controller 23, but the hot water temperature cannot be changed from the kitchen remote controller 22 (step S-9). In this way, the hot water temperature remains at 50 ° C., and the temperatures of the hot water coming out of the kitchen hot water mixing tap 5 and the bathroom hot water mixing tap 6 both become 50 ° C.
[0027]
Next, when the priority switch 24 of the kitchen remote controller 22 is pressed (step S-10), the priority shifts from the bathroom remote controller 23 to the kitchen remote controller 22. Thus, the priority of the bathroom remote controller 23 is turned off, the current hot water temperature is 50 ° C., and the set value of the hot water temperature is 50 ° C. On the other hand, the priority of the kitchen remote controller 22 is turned ON, and the current hot water temperature becomes 50 ° C. Since the priority has been shifted to the kitchen remote controller 22, the kitchen hot water temperature can be changed from the kitchen remote controller 22, but the bathroom hot water temperature cannot be changed from the bathroom remote controller 23 (step S-11). Thus, the temperature of the hot water supplied from the kitchen hot water mixing tap 5 and the temperature of the hot water exiting from the bathroom hot water mixing tap 6 are both 50 ° C. while the hot water temperature remains at 50 ° C.
[0028]
In the first embodiment, when the priority is switched from the bathroom remote controller 23 to the kitchen remote controller 22 and the hot water temperature is changed, the hot water temperature returns to the set temperature of the bathroom remote controller 23 after a certain period of time. the bathroom remote controller 23 when changing the set temperature by switching the priority from, since the switch to temperature set hot water supply temperature of hot water in the bathroom remote controller 23, it is possible to hot water temperature stability, such as shea showers , The usability is improved.
[0029]
Embodiment 2
FIG. 3 is a flowchart showing the operation of the second embodiment. In the first embodiment, when the hot water temperature is changed by the kitchen remote controller 22 by giving priority to the set temperature of the bathroom remote controller 23, the temperature is returned to the set temperature of the bathroom remote controller 23 after a certain period of time. Then, when the hot water temperature is changed by the kitchen remote control 22 by using the water flow detecting means 20 attached to the mixing hot water supply pipe 12 and giving priority to the set temperature of the bathroom remote control 23, the water flow detection by the water flow detecting means 20 is completed. At this point, the temperature returns to the set temperature of the bathroom remote controller 23. That is, when the priority is switched from the bathroom remote controller 23 to the kitchen remote controller 22 and the hot water temperature is changed, the hot water temperature is returned to the set temperature of the bathroom remote controller 23 when the water flow detection is completed. When the priority is switched from 22 to the bathroom remote controller 23 and the hot water temperature is changed, the set temperature is switched to the temperature set in the bathroom remote controller 23.
[0030]
For example, in the first embodiment, as shown in FIG. 2, the priority is shifted to the kitchen remote controller 22 (step S-2), and even when the hot water temperature is changed from 50 ° C. to 70 ° C. (step S-4). After 10 minutes have elapsed (step S-6), the priority is automatically returned to 50 ° C., which is the set temperature of the bathroom remote controller 23, while the priority is maintained on the kitchen remote controller 22 side (step S-). 7).
[0031]
On the other hand, in the second embodiment, as shown in FIG. 3, instead of the passage of time, the presence or absence of a water flow is detected by using the water flow detection means 20. Side (Step S-2), and even when the hot water temperature is changed from 50 ° C. to 70 ° C. (Step S-4), the water flow flowing through the mixed hot water supply pipe 12 is detected by the water flow detecting means 20, and the water flow is detected. It is detected whether or not the detection has been completed (step S-6). After the water flow detection has been completed, the priority is automatically returned to 50 ° C., which is the set temperature of the bathroom remote controller 23, while the priority is maintained on the kitchen remote controller 22 side. (Step S-7). That is, hot water is supplied once in the kitchen, and when the hot water is finished, the temperature of the hot water is returned to the original temperature.
[0032]
In the second embodiment, when the priority is switched from the bathroom remote controller 23 to the kitchen remote controller 22 to change the set temperature, the hot water temperature is returned to the set temperature of the bathroom remote controller 23 when the water flow detection is completed. when changing the set temperature by switching the priority to the bathroom remote controller 23 from the kitchen remote controller 22, since the switch to temperature set hot water supply temperature of hot water in the bathroom remote controller 23, achieve the hot water temperature stability, such as shea showers And the usability is improved.
[0033]
Embodiment 3
FIG. 4 is a flowchart showing the operation of the third embodiment. In the first embodiment, when the set temperature of the bathroom remote control 23 is prioritized and the hot water temperature is changed by the kitchen remote control 22, the temperature is returned to the set temperature of the bathroom remote control 23 after a certain period of time. Then, when the priority switch is switched to shift the priority from the bathroom remote controller 23 to the kitchen remote controller 22, the hot water temperature is not changed. That is, even when the priority is switched from the bathroom remote controller 23 to the kitchen remote controller 22, the hot water temperature is kept unchanged, and when the priority is switched from the kitchen remote controller 22 to the bathroom remote controller 23, the set temperature is changed to the bathroom remote controller. The temperature can be switched to the temperature set to 23.
[0034]
For example, in the first embodiment, as shown in FIG. 2, the priority is shifted to the kitchen remote controller 22 side (step S-2), and even when the hot water temperature is changed from 50 ° C. to 70 ° C. (step S-4) After 10 minutes have elapsed (step S-6), the priority is automatically returned to 50 ° C., which is the set temperature of the bathroom remote controller 23, while the priority is maintained on the kitchen remote controller 22 side (step S-). 7).
[0035]
On the other hand, in the third embodiment, as shown in FIG. 4, the priority is shifted to the kitchen remote controller 22 (step S-2), and the hot water temperature is changed from 50 ° C. to 70 ° C. (step S 2). S-4), the hot water temperature is not changed and is maintained at 50 ° C. (steps S-3 and S-7).
According to the third embodiment , even when the priority is switched from bathroom remote controller 23 to kitchen remote controller 22 to change the hot water temperature, the hot water temperature does not change. The temperature of the hot water such as a shower can be stabilized without temperature fluctuation, and the usability is improved.
[0036]
【The invention's effect】
As apparent from the above description, the present invention provides 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 an electric hot water mixing valve. A bathroom remote control and a kitchen , comprising a temperature sensor for detecting the temperature of the mixed hot and cold water sent from the valve, and a priority switch for setting the temperature, and operating the priority switch to switch a priority for setting the hot and cold water temperature of the electric hot and cold mixing valve. receiving a remote control, a signal from the temperature sensor and the bathroom remote controller and kitchen remote control, and a control unit for controlling the hot water temperature of the electric hot and cold water mixing valve, of the bathroom remote controller and kitchen remote controller, hot water bath remote control at power-on has priority for setting the temperature, also the kitchen remote controller is operated, if the priority hot-water supply water temperature is switched from the bathroom remote controller in the kitchen remote controller is changed, the electric hot and cold water mixing Of but hot water temperature is set at a set temperature of the hot water supply water temperature in the kitchen remote controller is switched priority, after a predetermined time has elapsed, the hot water supply water bath remote temperature with priority to set the hot water temperature when the power is turned on Since the temperature is set back to the set temperature, it is possible to obtain an electric water heater equipped with a hot water supply temperature control mechanism that is easy to use with little fluctuation of the hot water temperature.
[0037]
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 a temperature and flow rate of the mixed hot water sent from the electric hot water mixing valve. A bathroom remote control and a kitchen remote control , each of which has a temperature sensor and a water flow detecting means for detecting the temperature of the water, and a temperature setting priority switch, and switches the priority of setting the hot water temperature of the electric hot water mixing valve by operating the priority switch. sensor receives a signal from the water flow detection means and bathroom remote controller and kitchen remote control, and a control unit for controlling the hot water temperature of the electric hot and cold water mixing valve, of the bathroom remote controller and kitchen remote control, bathroom remote control at power-on hot water has priority for setting the temperature, also the kitchen remote controller is operated, if the priority hot-water supply water temperature is switched from the bathroom remote controller in the kitchen remote controller is changed, the electric Although hot water temperature of the water mixing valve is set to a set temperature of the hot water supply water temperature in the kitchen remote controller is switched priority, after the water flow detecting termination by water flow detection means has priority for setting the hot water temperature when the power is turned on Since the hot water temperature is set back to the set value of the hot water temperature of the bathroom remote controller, it is possible to obtain an electric water heater equipped with a convenient hot water temperature control mechanism with less fluctuation of the hot water temperature.
[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 the first embodiment.
FIG. 3 is a flowchart showing an operation of the second embodiment.
FIG. 4 is a flowchart showing the operation of the third embodiment.
FIG. 5 is a flowchart showing an example of the operation of the conventional vacuum cleaner.
[Explanation of symbols]
REFERENCE SIGNS LIST 1 hot water tank, 3 first temperature sensor, 4 electric hot water mixing valve, 5 kitchen hot water mixing tap, 6 bathroom hot water mixing tap, 20 water flow detecting means, 21 second temperature sensor, 22 kitchen remote control, 23 bathroom remote control, 24 Kitchen remote control priority switch, 25 bathroom remote control priority switch, 26 control unit.

Claims (2)

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 detecting a temperature of the mixed hot water sent from the electric hot water mixing valve. A temperature sensor, a temperature setting priority switch, a bathroom remote control and a kitchen remote control for switching a priority for setting the hot water temperature of the electric hot water mixing valve by operating the priority switch, the temperature sensor and the bathroom remote control, A control unit that receives a signal from the kitchen remote controller and controls the hot and cold water temperature of the electric hot and cold water mixing valve,
Among the bathroom remote controller and kitchen remote control has a priority the bathroom remote controller to set the hot water temperature at the time of power-on, also the kitchen remote controller is operated, it is switched priority from the bathroom remote controller to the kitchen remote controller When the hot water temperature is changed, the hot water temperature of the electric hot water mixing valve is set to the set hot water temperature of the kitchen remote control whose priority has been switched, but after a predetermined time has elapsed, the power is turned on. An electric water heater characterized in that the temperature of the hot water is set back to the set temperature of the hot water supply temperature of the bathroom remote controller having the priority of setting the hot water temperature. 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 a temperature and flow rate of the mixed hot water sent from the electric hot water mixing valve. A bathroom remote control and a kitchen remote control, each of which includes a temperature sensor and a water flow detecting means for detecting the temperature, and a priority switch for setting the temperature, and by operating the priority switch, switches a priority for setting the hot and cold water temperature of the electric hot and cold water mixing valve; A temperature sensor, a control unit for receiving a signal from the water flow detecting means and the bathroom remote control and the kitchen remote control, and controlling a hot water temperature of the electric hot water mixing valve;
Among the bathroom remote controller and kitchen remote control has a priority the bathroom remote controller to set the hot water temperature at the time of power-on, also the kitchen remote controller is operated, it is switched priority from the bathroom remote controller to the kitchen remote controller When the hot water temperature is changed, the hot water temperature of the electric hot water mixing valve is set to the set hot water temperature of the kitchen remote control whose priority has been switched. Is set back to the set hot water temperature of the bathroom remote controller having a priority to set the hot water temperature when the power is turned on .

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