JP6044348B2 - Hot water system - Google Patents

Description

  The present invention provides a hot water supply provided with a hot water supply device that can supply power to a plurality of load devices and can also supply power to a remote control device that is supplied with power from a predetermined power supply device if the condition is satisfied. About the system.

  The power consumption monitoring system described in Patent Literature 1 performs on / off control of power supply to a plurality of electrical devices connected to an outlet. The system includes monitoring means for measuring and monitoring the power consumption of a plurality of electrical devices. The monitoring means turns off the power supply to one or a plurality of electrical devices when the total value of the power consumption for the plurality of electrical devices exceeds a predetermined value.

JP-A-10-282161

  When the technique described in Patent Document 1 is applied to a hot water supply system, the hot water supply system includes a hot water supply device, a plurality of load devices whose power supply is controlled by the hot water supply device, and a remote power supply by a predetermined power supply device. And an operating device. In addition, the hot water supply system of such a structure is not well-known.

  In the case of the hot water supply system, the hot water supply apparatus needs a control circuit for controlling power supply to a plurality of load devices. In order to supply power to the remote control device when power supply from the power supply device cannot be obtained or to secure power supply capability to a plurality of load devices, the board on which the control circuit is mounted must be made large. There is a problem of not becoming.

  Accordingly, the present invention has been made in view of the above-described problems, and an object of the present invention is to provide hot water supply capable of supplying power to the remote control device and other load devices without excessively increasing the power supply capability of the hot water supply device. Is to provide a system.

In order to achieve the above object, the following technical means are adopted. That is, the engagement Ru inventions in hot water system, and the power obtained from an external power source (7) a predetermined plurality of load devices (3,4,5,3A, 4A) power supplies hot water supply device (1), hot water A device for remotely controlling the operation of the device, the remote operation device (2, 2A) receiving power supply from a predetermined power supply device (6), and the power supply for detecting the power supply status from the power supply device to the remote operation device When it is detected by the power supply detection means that the power supply from the power supply device to the remote control device is impossible by the detection means (10), based on the current operation status or past operation results of the plurality of load devices And a power supply control means (10) for selecting a power supply destination by the hot water supply device from among the remote operation device and the plurality of load devices, and the remote control device and the load device supply power from the hot water supply device in relation to the power supply capability. Cannot A display unit for displaying that is, the load device is characterized in that the display can be determined the extent of power supply amount from the water heater is made.

  According to the present invention, it is necessary to supply power from the remote control device and the plurality of load devices in order to select a power supply destination by the hot water supply device based on the current operation status or past operation results of the plurality of load devices. It becomes possible to supply power to the above. Thereby, when the power supply to the load device is low and the power supply to the remote operation device is necessary, the hot water supply device supplies the power to the remote operation device instead of the power supply device. Furthermore, when there is a margin in the power supply capability of the hot water supply device, it is possible to supply power to the load device. Therefore, it is possible to provide a hot water supply system that can supply power to the remote control device and other load devices without increasing the power supply capability of the hot water supply device.

The invention relating to the hot water supply system is a hot water supply device (1) for supplying electric power obtained from an external power supply (7) to a predetermined plurality of load devices (3A, 4A), and a device for remotely operating the hot water supply device. A remote control device (2A) that receives power supply from a predetermined power supply device (6),
Each of the plurality of load devices is configured to be able to communicate with the remote control device,
Each of the plurality of load devices determines whether or not there is power supply from the hot water supply device to the remote operation device based on information transmitted from the remote operation device. Current operation statuses of a plurality of load devices when the power supply detection means (31, 41) for detecting the supply status and the power supply detection means detect that power supply from the power supply device to the remote control device is impossible. Or, based on past operation results, power supply control means (31, 41) for selecting a power supply destination by a hot water supply device from a remote control device and a plurality of load equipment,
The remote control device and the load device have a display unit that indicates that power cannot be supplied from the hot water supply device because of the power supply capability, and the load device can display the degree of power supply from the hot water supply device. Is made.
Note that the reference numerals in parentheses described in the claims and the above-described means are examples of a correspondence relationship with the specific means described in the embodiments described later as one aspect, and are technical terms of the present invention. It does not limit the range.

It is a lineblock diagram showing the outline of the hot-water supply system concerning a 1st embodiment to which the present invention is applied. It is a flowchart for demonstrating the action | operation which concerns on power supply about the hot water supply system of 1st Embodiment. It is a flowchart for demonstrating the action | operation which concerns on power supply about the hot water supply system of 3rd Embodiment. It is the block diagram which showed the outline | summary of the hot water supply system which concerns on 3rd Embodiment to which this invention is applied.

  A plurality of modes for carrying out the present invention will be described below with reference to the drawings. In each embodiment, parts corresponding to the matters described in the preceding embodiment may be denoted by the same reference numerals, and redundant description may be omitted. When only a part of the configuration is described in each mode, the other modes described above can be applied to the other parts of the configuration. In addition to combinations of parts that clearly indicate that each embodiment can be combined specifically, the embodiments may be partially combined even if they are not clearly specified, unless there is a problem with the combination. Is possible.

(First embodiment)
1st Embodiment which is one form of the hot water supply system to which this invention is applied is described with reference to FIG.1 and FIG.2. The hot water supply system 100 includes a hot water supply device 1, load devices 3, 4, and 5 that are supplied with power from the hot water supply device 1, and a remote control device 2 that is normally supplied with power from the power supply device 6.

  The remote operation device 2 is a bathroom-installed remote controller, a kitchen-installed remote controller, or the like that can remotely control the operation of the hot water supply device 1. The power supply device 6 is a device that generates power using natural energy, such as a wind power generator or a solar power generator, or a storage battery that stores electric power, and is a device that supplies power to the remote operation device 2. The remote control device 2 is set to the most frequently used device among a plurality of devices that allow the user to command the operation of the hot water supply device 1.

  The load devices 3 and 4 are devices that are used less frequently than the remote operation device 2, and are, for example, other remote controllers that can remotely operate the hot water supply device 1. The load device 5 is a device that is used less frequently than the remote control device 2 and the load devices 3 and 4, and is an actuator such as a pump and various valve devices included in the hot water supply device 1.

  The hot water supply device 1 stores high-temperature water boiled by operating a heat pump unit using electric power from a commercial power source 7 as an external power source in a tank unit as hot water supply water. For example, the hot water supply device 1 boils hot water supply water in a predetermined time zone (for example, a late-night power rate time zone) in which the electricity charge of the system power is cheaper than other time zones. Furthermore, the hot water supply device 1 stores the amount of heat predicted to be used in the daytime period (for example, the time excluding the midnight electric power period of the day) in the tank, or raises the insufficient amount of heat in the daytime period. Or store.

  For example, the hot water supply device 1 includes at least a heat pump unit, a tank unit, a bathtub that is an example of a hot water supply terminal, and a control device that controls boiling operation, automatic hot water operation, and automatic drain operation. For example, the hot water storage ECU 10 functions as a control device. The hot water supply device 1 is a device that stores heat in a tank of a tank unit, and can use this heat storage to perform bath filling, hot water supply to a hot water supply terminal, and the like. The hot water supply device 1 uses hot water stored in the tank during the midnight power hours, or power from the grid power during the daytime hours, depending on the situation, when performing hot water filling in the bathtub or taking out hot water to the shower. Or use hot water for hot water supply by boiling operation using.

  The heat pump unit is, for example, a heating device that includes a heat pump cycle using carbon dioxide refrigerant as a heat exchange medium, and can heat water stored in the tank. The heat pump cycle includes a compressor, a refrigerant / water heat exchanger, a decompressor, and an air heat exchanger.

  The compressor is a device that compresses and discharges carbon dioxide refrigerant. The refrigerant / water heat exchanger heats the hot water by exchanging heat between the refrigerant compressed by the compressor and the hot water from the tank. The decompressor decompresses the high-pressure refrigerant that has passed through the refrigerant / water heat exchanger into a low-pressure state. The air heat exchanger causes heat exchange with the blown air from the blower to evaporate the low-pressure refrigerant decompressed by the decompressor. The refrigerant that has passed through the air heat exchanger is compressed again by the compressor and discharged in a high-pressure state.

  The tank and the heat pump cycle are connected by a circulation circuit. The water in the tank circulates in the circulation circuit by the driving force of the pump. During boiling operation, hot hot water heated by the refrigerant / water heat exchanger flows from the upper part of the tank and forms a high-temperature part in the upper part of the tank. The low temperature water stored in the bottom of the tank flows into the refrigerant / water heat exchanger, is heated by the refrigerant / water heat exchanger, and then sent to the upper part of the tank.

  The operation of the heat pump unit is controlled by a control signal from the heat pump ECU that communicates with the hot water storage ECU 10, and the operating state is input to the hot water storage ECU 10 via the heat pump ECU. The heat pump unit boils high-temperature water using the grid power in the late-night charge time period in order to store in the tank the necessary amount of heat that is expected to be used the next day based on past usage records. Stores the necessary heat consumption. The hot water storage ECU 10 operates the heat pump unit related to the boiling operation, the hot water operation when the automatic hot water filling operation to the bathtub is set, the solenoid valve, the mixing valve, the automatic valve of the tank unit relating to the hot water supply to the hot water supply terminal other than the bathtub Control the operation of each part such as drain plugs.

  The hot water storage ECU 10, based on temperature information from a plurality of hot water storage temperature thermistors provided at intervals in the upper and lower sides of the tank, the hot water heated in the upper part of the tank and the water before being heated in the lower part of the tank Can be detected. In this way, the hot water storage ECU 10 can calculate the amount of heat stored in the tank by detecting the temperature and the amount of hot water.

  The hot water supply device 1 mixes hot water taken out from the hot water pipe connected to the upper part of the tank and hot water taken out from the intermediate temperature take-out pipe or hot water taken in from the water supply pipe at the time of hot water. Is supplied to hot water terminals such as showers and bathtubs.

  The hot water storage ECU 10 is mainly composed of a microcomputer, and a built-in ROM is provided with a storage device such as an updatable RAM provided with a preset control program. This storage device stores past hot water supply usage results. Examples of the use of hot water supply include the amount of heat used per day (the amount of hot water used and the temperature of hot water) over the past week, the operation mode when the boiling operation is performed, and the amount of power consumed. The hot water storage ECU 10 is based on the temperature information from each thermistor, the flow information from each flow counter, the operation signal of the operation input unit of the remote control device 2 and other remote controllers (load devices 3 and 4), etc. Controls actuators such as each mixing valve, each on-off valve, and pump.

  The hot water storage ECU 10 is configured to be able to communicate with the heat pump ECU that controls the operation of the heat pump unit and the remote control device 2, the load device 3, and the load device 4. The hot water storage ECU 10 receives the current operation status or past operation results of the plurality of load devices 3, 4 and 5 from each load device. A power supply status from the power supply device 6 to the remote operation device 2 is transmitted from the remote operation device 2 to the hot water storage ECU 10. The past operation results may be stored in each of the load devices 3, 4, 5, or transmitted from each load device 3, 4, 5 to the hot water storage ECU 10 and stored in the storage device of the hot water storage ECU 10. It may be a form.

  The hot water supply device 1 can supply electric power to the remote operation device 2 and is electrically connected to the remote operation device 2 through a cable that can communicate. The hot water supply device 1 can supply power to the load devices 3, 4, and 5, and is electrically connected to the load devices 3, 4, and 5 through cables that can communicate with each other. In each cable, a CPLT line and a GND line are provided together with a power line, and a CPLT signal (control pilot signal) can be communicated.

  The hot water storage ECU 10 also functions as power supply detection means and power supply control means. The power supply detection means detects the power supply status from the power supply device 6 to the remote control device 2. The power supply status is presence / absence of power supply to the remote control device 2 and power supply amount (power supply amount). The power supply control means supplies hot water from the remote operation device 2 and the plurality of load devices 3, 4, 5 when the power supply detection means detects that power supply from the power supply device 6 to the remote operation device 2 is impossible. A power supply destination by the device 1 is selected. The power supply control means selects the power supply destination based on the current operation status or past operation results of the plurality of load devices 3, 4, and 5. In other words, the power supply control means acquires the operating status of each load device, and determines the device to which power is to be supplied in light of the determination criteria stored in advance. The hot water supply device 1 supplies power to the device to be supplied with power according to this determination.

  The load devices 3 and 4 include touch panels 30 and 40 that are examples of a display unit that displays information related to the hot water supply operation. The touch panels 30 and 40 are constituted by, for example, a panel having a liquid crystal display unit and an input unit. Various information such as the operating status of the water heater 1 and setting information is displayed on the touch panels 30 and 40. As the touch panels 30 and 40, panels having various operation methods such as a resistive film method, a projection capacitance method, a surface capacitance method, and an ultrasonic surface acoustic wave method can be employed. The brightness of the touch panels 30 and 40 is configured to change according to the amount of power supplied to the load devices 3 and 4 by the hot water supply device 1. Therefore, when the power supply amount decreases, the brightness of the touch panels 30 and 40 decreases.

  Next, the operation | movement which concerns on the power supply in the hot water supply system 100 is demonstrated with reference to the flowchart shown in FIG. This operation process is mainly executed by the hot water storage ECU 10. The operation is started in a state where power is supplied to the hot water storage ECU 10.

  In step 10, based on the information transmitted from the remote operation device 2, it is determined whether there is power supply from the power supply device 6 to the remote operation device 2 as a power supply detection unit. When the hot water storage ECU 10 determines in step 10 that there is power supply to the remote control device 2, in step 15, power supply control means executes power supply to the load devices 3, 4, 5 other than the remote control device 2. And it returns to step 10 again.

  If it is determined in step 10 that there is no power supply to the remote operation device 2, it is determined in step 20 whether or not the power supply amount to the remote operation device 2 can be secured. When the hot water storage ECU 10 determines that the power supply amount to the remote control device 2 can be secured, the power supply control unit executes power supply to both the remote control device 2 and the load devices 3, 4, and 5 in step 25 as power supply control means. And it returns to step 10 again.

  If the hot water storage ECU 10 determines that the amount of power supplied to the remote control device 2 cannot be secured, the hot water storage ECU 10 acquires the usage status of each load device based on the information transmitted from each load device in step 30. The usage status of each load device is the current operating status or the past operating performance. The current operation status is, for example, current power consumption for each load device. The past driving performance is, for example, the power consumption of each load device in the past predetermined period.

  Next, in step 40, it is determined whether there is a load device with low usage frequency. A load device with low usage frequency is, for example, a load device whose current power consumption is less than a predetermined value, or a load device whose power consumption has become equal to or greater than a predetermined value in a predetermined period in the past. It is. That is, in step 40, a load device with a low usage frequency and a load device that is not so are discriminated in light of the current or past results in accordance with a predetermined criterion.

  When the hot water storage ECU 10 determines that there is no load device that is not frequently used, the hot water storage ECU 10 executes power supply to the load devices 3, 4, and 5 other than the remote operation device 2 in step 50 as power supply control means. In this state, the remote control device 2 is not supplied with power. And it returns to step 10 again.

  When the hot water storage ECU 10 determines that there is a load device with low usage frequency, the power supply control unit stops power supply to the load device with low use frequency determined at step 42 as power supply control means. The remote control device 2 and the load device whose power supply has been stopped are in a state where nothing is displayed on the display unit such as a touch panel and the LEDs and the like are not lit. Further, in step 44, hot water storage ECU 10 executes power supply to remote control device 2 and the load device determined to be frequently used as power supply control means. And it returns to step 10 again.

  The processing shown in FIG. 2 described so far is continuously executed while power is supplied to the hot water storage ECU 10. It is preferable that the remote control device 2 and the load device whose power supply has been stopped display a message stating that “currently unavailable due to power supply capability”. With this display, the user can recognize that there is no failure.

  The effects brought about by the hot water supply system 100 of the present embodiment will be described below. The hot water supply system 100 is capable of remotely controlling the operation of the hot water supply apparatus 1 and the hot water supply apparatus 1 for supplying electric power obtained from the commercial power supply 7 to a predetermined plurality of load devices 3, 4, 5. Remote control device 2 that receives the power supply of The hot water supply system 100 includes power supply detection means (hot water storage ECU 10) and power supply control means (hot water storage ECU 10) for detecting the power supply status from the power supply device 6 to the remote control device 2. When the power supply from the power supply device 6 to the remote operation device 2 is not possible, the power supply control means is based on the current operation status or past operation results of the plurality of load devices 3, 4, 5. The power supply destination by the hot water supply device 1 is selected from the two and a plurality of load devices.

  According to this, in order to select the power supply destination by the hot water supply device 1 based on the current operation status or past operation results of the plurality of load devices 3, 4, 5, the remote operation device 2 and the plurality of load devices 3 are selected. , 4 and 5 can be supplied to those requiring power supply. Thereby, when the power supply to the load equipment is low and the power supply to the remote control device 2 is necessary, the hot water supply device 1 is used instead of the power supply device 6 and the remote operation with high use frequency or high priority is performed. Power can be supplied to the device 2. Furthermore, when there is a margin in the power supply capability of the hot water supply device 1, it is possible to supply power to the load device. As described above, according to the hot water supply system 100, when the power supply from the power supply device 6 cannot be obtained, power is supplied to the remote control device 2, and the power supply capability to the plurality of load devices 3, 4, and 5 is secured. Therefore, it is possible to avoid an increase in the size of the power supply substrate in the hot water supply apparatus 1. Therefore, by providing the hot water supply system 100 which is also a power supply system, the number of parts and the size of the control circuit for supplying power in the hot water supply device 1 can be suppressed without excessively increasing the power supply capability of the hot water supply device 1. .

  In addition, the power supply control means (hot water storage ECU 10) detects the past of the load device when the power supply detection means (hot water storage ECU 10) detects that power supply from the power supply device 6 to the remote control device 2 is impossible (S10). If the operation frequency is determined to be low (step 40), power supply to the load device determined to be low in operation frequency is stopped (step 42) and power supply to the remote control device 2 is performed (step 44). .

  Thereby, since the power supply from the hot water supply device 1 to the load device is stopped, the power supply capability of the hot water supply device 1 can be suppressed, and the enlargement of the control circuit for power supply mounted in the hot water storage ECU 10 can be suppressed. . Therefore, according to 1st Embodiment, while being able to avoid making the power supply capability of the hot-water supply apparatus 1 excessive, the power supply with respect to the remote control apparatus 2 and the other load apparatuses 3-5 is enabled.

(Second Embodiment)
2nd Embodiment demonstrates the flowchart of FIG. 3 which is another form of the process shown in FIG. 2 demonstrated in 1st Embodiment. In the second embodiment, the configuration of the hot water supply system 100, its operation, and effects are the same as in the first embodiment. In FIG. 3, the processes with the same step numbers as in FIG. 2 are the same as those in the first embodiment. Hereinafter, only processing portions different from the first embodiment will be described.

  As shown in FIG. 3, according to the operation related to the power supply of the second embodiment, when the hot water storage ECU 10 determines that there is a load device with a low use frequency in Step 40, it is used in Step 42 </ b> A as a power supply control unit. The amount of power supplied to the load device determined to be low in frequency is reduced. That is, the power supply capacity supplied to the load device is set to be lower than that during normal power supply (steps 15 and 50).

  Thus, when it is detected that the power supply from the power supply device 6 to the remote control device 2 is impossible (step 10), the power supply control means (hot water storage ECU 10) determines that the past operation frequency is low. The power is supplied with a reduced power supply amount to the load device (step 40, step 42A). Further, power is supplied to the remote control device 2 (step 44).

  Thereby, since the power supply capability supplied to the load device is limited, it is possible to suppress the power consumption of the load device determined to be low in use frequency. Therefore, according to 2nd Embodiment, while being able to avoid making the power supply capability of the hot-water supply apparatus 1 excessive, the power supply with respect to the remote control apparatus 2 and the other load apparatuses 3-5 is enabled. Furthermore, according to the second embodiment, since the power supply to the load device determined to be infrequently used is not stopped, the user can use the load device, and the user misunderstands the failure or the like. Can be avoided.

  Further, the luminance of the touch panels 30 and 40 and the LEDs of the load devices 3 and 4 may be lowered or the volume of the sound may be lowered according to the power supply that reduces the power supply amount. Further, when the load device is an actuator, the rotation number of the rotation mechanism may be exhibited.

(Third embodiment)
In the third embodiment, a hot water supply system 100A shown in FIG. 4 that is another form of the process shown in FIG. 1 described in the first embodiment will be described. 3rd Embodiment is the same as that of 1st Embodiment about the operation | movement of a hot water supply system, an effect, and the process which concerns on the power supply shown in FIG. 2 or FIG. In FIG. 4, the components denoted by the reference numerals in FIG. 1 are the same as those in the first embodiment. Hereinafter, only processing portions different from the first embodiment will be described.

  As shown in FIG. 4, in the hot water supply system 100A, the load devices 3A and 4A are configured to be able to directly communicate with the remote control device 2A. Furthermore, the control devices 31 and 41 of the load devices 3A and 4A have functions as the power supply detection unit and the power supply control unit described in the first embodiment. In other words, the load devices 3A and 4A are not connected to the hot water storage ECU 10 of the hot water supply device 1 but based on information transmitted from the remote operation device 2A, the power supply device 6 to the remote operation device 2A as power supply detection means. To determine whether there is power supply. Therefore, each of the load devices 3A and 4A selects a power supply detection means for acquiring information from the remote operation device that power supply from the power supply device 6 to the remote operation device 2A is impossible, and a power supply destination by the hot water supply device 1. Power supply control means.

  According to this configuration, since it is not necessary to mount the power supply detection means and the power supply control means in the hot water supply device 1, the power supply control circuit in the hot water supply device 1 can be dispensed with a device that achieves these means. The number of parts can be suppressed and the size of the hot water storage ECU 10 can be suppressed.

(Other embodiments)
In the above-described embodiment, the preferred embodiment of the present invention has been described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the spirit of the present invention. It is. The structure of the said embodiment is an illustration to the last, Comprising: The scope of the present invention is not limited to the range of these description. The scope of the present invention is indicated by the description of the scope of claims, and further includes meanings equivalent to the description of the scope of claims and all modifications within the scope.

  In the above embodiment, the hot water supply apparatus 1 stores the high-temperature water boiled by operating the heat pump unit using the electric power from the commercial power supply 7 in the tank unit as hot water supply water. A configuration using generated power such as a solar power generation device may be used.

In the said embodiment, although the hot water supply apparatus 1 is an apparatus of the type which stores hot water in a tank, it is not limited to this form. For example, the hot water supply device 1 may be configured by a device that directly discharges hot water without storing hot water boiled by the heating device. In the above embodiment, the heating device in the hot water supply device 1 was a heat pump unit. It is not limited to this format. For example, the heating device may be a gas hot water supply type, a kerosene hot water supply type, or the like.

  In the said embodiment, although the load apparatus which the hot water supply apparatus 1 can supply electric power is three apparatuses, it is not limited to this number.

DESCRIPTION OF SYMBOLS 1 ... Hot-water supply apparatus 2, 2A ... Remote operation apparatus 3, 4, 5, 3A, 4A ... Load apparatus 6 ... Power feeding apparatus 7 ... Commercial power supply (external power supply)
10 ... Hot water storage ECU (power supply detection means, power supply control means)

Claims (5)

A hot water supply device (1) for supplying electric power obtained from the external power source (7) to a predetermined plurality of load devices (3,4, 5, 3A, 4A);
A device for remotely operating the hot water supply device, the remote control device (2, 2A) receiving power supply from a predetermined power supply device (6);
Power supply detection means (10) for detecting a power supply status from the power supply device to the remote control device;
When it is detected by the power supply detection means that the power supply from the power supply device to the remote control device is not possible, the remote operation is performed based on the current operation status or past operation results of the plurality of load devices. Power supply control means (10) for selecting a power supply destination by the hot water supply device from among the operating device and the plurality of load devices;
Equipped with a,
The remote control device and the load device have a display unit for displaying that the power supply from the hot water supply device cannot be performed due to power supply capability, and the load device has a power supply amount from the hot water supply device. A hot water supply system characterized in that the display can be distinguished . A hot water supply device (1) for supplying electric power obtained from the external power source (7) to a predetermined plurality of load devices (3A, 4A);
A device for remotely controlling the operation of the hot water supply device, the remote control device (2A) receiving power supply from a predetermined power supply device (6);
With
Each of the plurality of load devices is configured to be able to communicate with the remote control device,
Each of the plurality of load devices is
By determining whether there is power supply from the hot water supply device to the remote operation device based on information transmitted from the remote operation device, the power supply status from the power supply device to the remote operation device is determined. Power supply detection means (31, 41) for detecting;
When it is detected by the power supply detection means that the power supply from the power supply device to the remote control device is not possible, the remote operation is performed based on the current operation status or past operation results of the plurality of load devices. Power supply control means (31, 41) for selecting a power supply destination by the hot water supply device from among the operating device and the plurality of load devices;
With
The remote control device and the load device have a display unit for displaying that the power supply from the hot water supply device cannot be performed due to power supply capability, and the load device has a power supply amount from the hot water supply device. hot water supply system that is characterized in that a distinguishable Show is made. The hot water supply system according to claim 1 or 2 , wherein the power supply detection unit and the power supply control unit are executed in a state where power is supplied from the external power source to the hot water supply device . The power supply control means determines that the past operation frequency of the load device is low when the power supply detection means detects that power supply from the power supply apparatus to the remote control device is impossible (S10). Then (S40), the power supply to the load device determined to be low in operation frequency is stopped (S42), and the power supply to the remote control device is performed (S44). 4. The hot water supply system according to any one of 3. The power supply control means determines that the past operation frequency of the load device is low when the power supply detection means detects that power supply from the power supply apparatus to the remote control device is impossible (S10). Then (S40), the power supply to the load device determined to be low in operation frequency is supplied (S42A), and the power is supplied to the remote control device (S44). The hot water supply system according to any one of claims 1 to 3.

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