JP6770449B2 - Photovoltaic power generation equipment cooperation hot water storage type hot water supply system and solar power generation equipment cooperation hot water storage type hot water supply equipment - Google Patents

Description

The present invention relates to a photovoltaic power generation device linked hot water storage type hot water supply system and a photovoltaic power generation device linked hot water storage type hot water supply device that perform boiling operation using electric power generated by photovoltaic power generation.

Conventionally, in this type of solar power generation device linked hot water storage type hot water supply system, as described in Patent Document 1, based on the weather prediction information acquired from the outside, from the power generated by the solar power generation device expected the next day, The surplus power value for the next day is predicted by subtracting the load power consumption value consumed by the electric load other than the hot water supply device, and if the surplus power value is equal to or greater than the device power consumption value predicted to be consumed by the hot water supply device the next day. In the daytime of the next day, there was one that judged that boiling operation using solar power was feasible.

Japanese Unexamined Patent Publication No. 2013-148287

In the above-mentioned prior art, when it is determined that the boiling operation in the daytime zone of the next day is feasible as described above, the amount of boiling by the boiling operation in the daytime zone is equal to the nighttime zone before the next day. During (the night zone from the day before the next day to the next day), the amount of boiling in the boiling operation (= boiling operation using the power supplied from outside the system) executed by the usual method can be reduced. .. In this case, immediately after the end of the night zone (in other words, immediately after the start of the day zone, for example, 7:00, etc.), not all the hot water in the hot water storage tank is in a boiling state. Unheated water remains in the hot water storage tank to some extent (= the amount of boiling water due to the boiling operation in the daytime zone by the electric power of the photovoltaic power generation).

As a result, the user is suspicious of the existence of unheated water in the hot water storage tank (or is concerned about running out of hot water in subsequent use), and in the daytime zone when the electricity charge is high, the user takes the trouble to manually operate the predetermined amount of the water. There is a problem that the boiling operation may be executed (= so-called manual hot water addition) or it may be misunderstood as a malfunction of the hot water storage type hot water supply device.

In order to solve the above problems, claim 1 of the present invention includes a photovoltaic power generation device, a hot water storage tank for storing hot water, and a heating means for heating the hot water, and the heating means is the hot water in the hot water storage tank. In a photovoltaic power generation device linked hot water storage type hot water supply system having a hot water storage type hot water supply device that performs a boiling operation to heat the water, the surplus power predicted value on the day after the desired date is used by using the generated power predicted value of the photovoltaic power generation device. The surplus power prediction means for determining the above, the display means for displaying the desired display, and the nighttime for completing the boiling of the amount of hot water required for the next day by the end time of the predetermined nighttime zone from the desired day to the next day. The hot water storage using the electric power from the photovoltaic power generation device in the daytime zone excluding the night zone of the next day based on the surplus electric power predicted value at a predetermined first timing until the boiling start time. When the daytime boiling determination means for determining whether or not the boiling operation of the hot water supply device is possible and the daytime boiling determination means determine that the boiling operation in the daytime zone is possible, the first timing and thereafter The display control means for controlling the display means so as to display the daytime notice corresponding to the execution of the boiling operation in the daytime zone at a predetermined second timing until the end time of the nighttime zone. And have.

Further, in claim 2, the device power consumption predicting means for determining the device power consumption prediction value consumed by the hot water storage type hot water supply device in the next day is further provided, and the surplus power prediction means is said to be in the next day. Using the predicted power generation value of the solar power generation device and the predicted load power consumption value consumed by the electric load excluding the hot water storage type hot water supply device, the predicted surplus power consumption value on the next day is determined, and the daytime boiling is performed. The determination means determines whether or not the boiling operation is possible based on the surplus power prediction value and the device power consumption prediction value determined by the device power consumption prediction means.

Further, claim 3 further includes a meteorological information acquisition means for acquiring meteorological information.
The surplus power prediction means determines the surplus power prediction value on the next day by using the generated power prediction value based on the weather information acquired by the weather information acquisition means and the load power consumption prediction value. To do.

Further, in claim 4, the display control means controls the display means so as to extinguish the daytime boiling notice display when the boiling operation of the hot water storage type hot water supply device is completed in the daytime zone. is there.

Further, in claim 5, when the daytime boiling determination means determines that the boiling operation in the daytime zone is impossible, the display control means does not display the daytime boiling notice. It controls the display means.

Further, in claim 6, when the display control means determines that the boiling operation in the daytime zone is possible by the daytime boiling determination means, in addition to the daytime boiling notice display, the daytime zone The display means is controlled so as to further display the start time of the boiling operation of the hot water storage type hot water supply device in the above.

Further, in claim 7, when the display control means determines that the boiling operation in the daytime zone is possible by the daytime boiling determination means, the boiling operation of the hot water storage type hot water supply device in the daytime zone is possible. Is started, the display means is controlled so that the display of the start time of the boiling operation is extinguished.

Further, in claim 8, the display control means controls the display means so as to display the amount of the hot water which is equal to or higher than a predetermined temperature in the hot water storage tank.

Further, claim 9 has a remote control means capable of manually instructing the execution of a predetermined amount of the boiling operation in the hot water storage type hot water supply device.

Further, in claim 10, the display means is provided in the remote control means.

Further, in claim 11, the hot water storage tank for storing hot water, a heating means for heating the hot water, and a display means for displaying a desired display are provided, and the heating means stores the hot water in cooperation with a photovoltaic power generation device. In the photovoltaic power generation device linked hot water storage type hot water supply device that performs boiling operation to heat the hot water in the tank, the hot water storage device using the electric power from the photovoltaic power generation device in the daytime zone excluding the night zone on the day after the desired day. The determination was made when the daytime boiling determination means for determining whether or not the boiling operation of the type hot water supply device was possible and the daytime boiling determination means determined that the boiling operation in the daytime zone was possible. The time point is set as the first timing, and the daytime boiling notice display corresponding to the execution of the boiling operation in the daytime zone is performed at a predetermined second timing after the first timing and until the end time of the nighttime zone. As described above, the display control means for controlling the display means is provided.

According to claim 1 of the present invention, a photovoltaic power generation device and a hot water storage type hot water supply device are provided. When the sunshine conditions are good, the photovoltaic power generation device can receive sunlight to generate electricity, and the hot water storage type hot water supply device uses the electric power generated by this photovoltaic power generation device to provide a heat pump type heating means. A boiling operation for heating the hot water in the hot water storage tank can be performed via a heating circulation circuit.

When the boiling operation is performed using the electric power generated by solar power generation in this way, the power value supplied to the hot water storage type hot water supply device (specifically, for example, the consumption of the electric load excluding the hot water storage type hot water supply device from the generated power value). The surplus power value after deducting the load power consumption value) needs to be large to some extent. Therefore, in order to smoothly perform the boiling operation, according to claim 1, a surplus power prediction means is provided.

That is, the surplus power prediction means uses the power generation prediction value of the photovoltaic power generation device, which represents the temporal fluctuation of the power generation value of the photovoltaic power generation device, and uses the surplus power prediction value for one day following a certain day (desired day). Determine the estimated power value.

Then, based on the surplus power prediction value, it is determined by the daytime boiling determination means whether or not the boiling operation of the hot water storage type hot water supply device in the daytime zone of the next day can be executed. For example, when the surplus power predicted value on the next day is relatively large (specifically, for example, when the device power consumption predicted value consumed by the hot water storage type hot water supply device or more), it is determined that the boiling operation can be executed. Will be done. It should be noted that this determination is made at a predetermined timing (the first time) between the desired day and the end time of the night zone over the next day until the night boiling start time for completing the boiling of the hot water storage amount required for the next day. It is executed at 1 timing).

By the way, when it is determined that the boiling operation in the daytime zone of the next day is feasible as described above, the amount of boiling by the boiling operation in the daytime zone is divided into the night zone from the desired day to the next day. The amount of boiling can be reduced by the boiling operation performed by the usual method (using the electric power supplied from outside the system). As a result, even immediately after the end of the night zone (in other words, immediately after the start of the day zone, for example, 7:00, etc.), not all the hot water in the hot water storage tank has been boiled. Unheated water remains in the hot water storage tank to some extent (= the amount of boiling water due to the boiling operation in the daytime zone by the electric power of the photovoltaic power generation).

Corresponding to this, according to claim 1, a display control means is provided. When the daytime boiling determination means determines that the daytime boiling operation of the next day is feasible as described above, the display control means controls the appropriate timing (specifically, the determination time). After the first timing and after the second timing until the end time of the night zone), the corresponding lunchtime notice display is displayed in the display means. As a result, the user visually recognizes the daytime notice display, and the reason why the unheated water remains in the hot water storage tank is that the boiling operation by the electric power of the photovoltaic power generation is executed in the daytime after that. It can be correctly recognized that it is from. As a result, it is possible to avoid inconveniences such as execution of the boiling operation by the manual operation and misunderstanding as an operation failure. It is also possible to notify the user that the power of the photovoltaic power generation can be used on the next day, that is, that the weather information on the next day is generally good (sunny).

Further, according to claim 2, the daytime boiling determination means has a surplus power predicted value determined by using the generated power predicted value of the solar power generation device and the load power consumption predicted value consumed by the electric load, and the above. By determining whether or not the boiling operation is possible based on the device power consumption predicted value determined by the device power consumption predicting means, a more accurate and reliable determination can be made.

Further, according to claim 3, the weather information (weather forecast information, sunshine duration information, etc.) for one day on the next day is acquired by the weather information acquisition means. Since the weather information reveals the temporal fluctuation of the sunshine condition on the next day, the surplus power prediction means corresponds to the temporal fluctuation of the generated power value in the photovoltaic power generation device. The surplus power predicted value can be determined by using the value and the load power consumption predicted value. In this way, it is possible to reliably determine the predicted surplus power value by using, for example, known weather information provided from outside the system.

Further, according to claim 4, the daytime boiling notice display disappears when the daytime boiling operation is completed, so that the user is informed that the daytime boiling operation using solar power generation has been completed. It can be surely recognized.

Further, according to claim 5, by not displaying the daytime notice, the boiling operation using the power of the photovoltaic power generation is not performed the next day, in other words, the weather information on the next day is not good. It can be surely recognized by the user.

Further, according to claim 6, it is possible to reliably notify the user of the time when the boiling operation by the electric power of the photovoltaic power generation is started in the daytime zone.

Further, according to claim 7, the display of the start time of the boiling operation is surely extinguished after the start of the boiling operation, so that, for example, the display is made even after the start of the boiling operation (or). It is possible to avoid a user's misunderstanding (furthermore, a misunderstanding with the start time of the boiling operation on the next day) in the case where the display state is displayed even after the end of the boiling operation).

Further, according to claim 8, the reason why not all the hot water in the hot water storage tank is displayed as the hot water having a temperature equal to or higher than the predetermined temperature in the boiled state immediately after the end of the night zone. After that, the user can be surely recognized that the boiling operation by the electric power of the photovoltaic power generation is executed in the daytime zone.

Further, according to claim 9, in a configuration in which the user can manually instruct the execution of the boiling operation via the remote control means, the user can execute the boiling operation by the electric power of the photovoltaic power generation in the daytime. It is possible to surely recognize and prevent the boiling operation by the manual operation from being inadvertently executed.

Further, according to claim 10, it is possible to make the user surely recognize that the boiling operation by the electric power of the photovoltaic power generation is executed in the daytime zone through the remote control means at hand.

System configuration diagram of a hot water storage type hot water supply system linked with a photovoltaic power generation device according to an embodiment of the present invention Functional block diagram of HEMS equipment and control unit Graph diagram that conceptually shows the temporal behavior of the predicted value of the amount of power generated by photovoltaic power generation and the predicted value of the amount of power consumption in the electric load equipment when the weather of the next day is predicted to be fine. Graph diagram conceptually showing the temporal behavior of the predicted value of the amount of power generated by photovoltaic power generation and the predicted value of the amount of power consumption in the electric load equipment when the weather on the next day is predicted to be rainy or cloudy. External view showing the detailed configuration of the remote control device The figure which shows the display example of the next morning by the remote control device when the boiling operation is performed in the night time zone. The figure which shows the display example of the next morning by the remote control device of the comparative example of one Embodiment of this invention in the case of performing the boiling operation in the boiling time zone of the daytime zone of the next day. The figure which shows the display example of the next morning by the remote control device of one Embodiment of this invention in the case of performing the boiling operation in the boiling time zone of the daytime zone of the next day. The figure which shows the display example of the evening of the next day by the remote control device of one Embodiment of this invention after the boiling operation was performed in the boiling time zone of the daytime of the next day. The figure which shows the modification which displays the window on the display part of a remote control device. Flow chart showing the control procedure executed by the HEMS device Flow chart showing the first half of the control procedure performed by the control unit Flow chart showing the second half of the control procedure performed by the control unit Flow chart showing the detailed procedure of step S200 Flow chart showing the detailed procedure of step S300

Next, an embodiment of the present invention will be described with reference to FIGS. 1 to 15.

FIG. 1 shows the system configuration of the hot water storage type hot water supply system linked with the photovoltaic power generation device of the present embodiment. In addition, in FIG. 1, in order to prevent the complexity of the illustration, a part of the signal transmission / reception described later is omitted. In FIG. 1, the photovoltaic power generation device linked hot water storage type hot water supply system 100 of the present embodiment includes a heat pump type hot water storage type hot water supply device 1 installed in a building (corresponding to a specific power consumption facility) such as a house (not shown). A sun equipped with a distribution board 2 connected to a commercial power supply 49, a photovoltaic power generation panel 4 installed on the roof of the house or the like, and an inverter 5 for converting the power generated by the photovoltaic power generation panel 4 into an AC power supply. An electric load device 6 (indicated simply as "inverter" in FIG. 1) constituting a photovoltaic power generation device 3 and a load other than the hot water storage type hot water supply device 1, for example, an air conditioner, and the inside of the house. It has a HEMS (= Home Energy Management System) device 7 for performing power management, a network communication network 8, and a server 9.

The HEMS device 7 is connected to the hot water storage type hot water supply device 1 and the solar power generation device 3 in both directions (see the broken line; the same applies hereinafter). As a result, the HEMS device 7 can collect the usage status of the hot water storage type hot water supply device 1, the power generation information of the photovoltaic power generation device 3, and the power consumption information of each branch circuit of the distribution board 2. Further, the HEMS device 7 is further connected to the server device 9 via the network communication network 8 so that necessary information can be exchanged with each other. Instead of the HEMS device 7 collecting the generated power information by communication with the photovoltaic power generation device 3, the HEMS device 7 inputs the generated power to the distribution board 2 or commercializes the distribution board 3 with the distribution board 3. By monitoring the transfer of electric power to and from the power source 49, the generated electric power information of the photovoltaic power generation device 3 may be collected.

The hot water storage type hot water supply device 1 includes a remote control device 50 (corresponding to a remote operation means), a hot water storage tank 10 for storing hot water, a water supply pipe 11 for supplying water to the bottom of the hot water storage tank 10, and a top of the hot water storage tank 10. The hot water supply pipe 12 for hot water supply, the water supply bypass pipe 13 branched from the water supply pipe 11, the hot water from the hot water supply pipe 12 and the water from the water supply bypass pipe 13 are brought to the hot water supply set temperature set by the remote control device 50. A mixing valve 14 for mixing so as to be, a hot water supply pipe 15 for supplying hot water to a hot water supply terminal (not shown), a hot water supply flow rate sensor 16 for detecting the hot water supply flow rate and outputting a corresponding detection signal, and a hot water supply flow rate sensor 16 for detecting the hot water supply temperature and corresponding detection signals. It has a hot water supply temperature sensor 17 that outputs hot water, and a hot water storage temperature sensor 18 that detects the hot water storage temperature of hot water in the hot water storage tank 10 and outputs a corresponding detection signal. A plurality of the hot water storage temperature sensors 18 are provided on the side surface of the hot water storage tank 10 at different height positions. When each of the plurality of hot water storage temperature sensors 18 detects, for example, a hot water temperature equal to or higher than a predetermined threshold value set in advance corresponding to the temperature of the hot water in a sufficiently heated state, the corresponding detection signal Is configured to be output to the control device 31. As a result, the control device 31 is in a sufficiently heated state in the hot water storage tank 10 based on how many of the plurality of hot water storage temperature sensors 18 output the detection signal. The amount of hot water (that is, the amount of hot water stored) can be detected.

Further, the hot water storage type hot water supply device 1 further has a heat pump device 19 (corresponding to a heat pump type heating means) for heating the hot water in the hot water storage tank 10 to a boiling target temperature. The heat pump device 19 includes a compressor 20 that compresses and conveys the refrigerant to a high temperature and a high pressure, a water refrigerant heat exchanger 21 that exchanges heat between the high temperature and high pressure refrigerant and water from the hot water storage tank 10, and the water refrigerant. An expansion valve 22 that decompresses and expands the refrigerant after heat exchange in the heat exchanger 21, an air heat exchanger 23 that exchanges heat between the outside air and the low-pressure refrigerant to evaporate the low-pressure refrigerant, and the air heat exchanger 23 with the outside air. The blower 24 that blows air, the discharge temperature sensor 25 that detects the temperature of the refrigerant discharged from the compressor 20 and outputs the corresponding detection signal to the control device 31, and the discharge temperature sensor 25 that detects the outside air temperature and outputs the corresponding detection signal. It includes an outside air temperature sensor 30 that outputs to the control device 31.

Further, the hot water storage type hot water supply device 1 further connects the control device 31 that controls the operation of the entire hot water storage type hot water supply device 1 to the lower portion of the hot water storage tank 10 and the water side inlet of the water refrigerant heat exchanger 21. A heating return pipe 27 connecting the water side outlet of the water refrigerant heat exchanger 21 and the upper part of the hot water storage tank 10, a heating circulation pump 28 provided in the middle of the heating going pipe 26, and a heating circulation pump 28. It has a boiling temperature sensor 29 provided in the heating return pipe 27 and outputting a detection signal to the control device 31. The heating circulation circuit is composed of the heating going pipe 26, the heating return pipe 27, and the heating circulation pump 28 (hereinafter, as appropriate, simply referred to as “heating circulation circuits 26, 27, 28”).

As described above, the photovoltaic power generation device linked hot water storage type hot water supply system 100 of the present embodiment includes the photovoltaic power generation device 3 and the hot water storage type hot water supply device 1. When the sunshine conditions are good, the photovoltaic power generation device 3 can receive sunlight from the photovoltaic power generation panel 4 to generate electricity, and the hot water storage type hot water supply device 1 can be generated by the photovoltaic power generation device 3. Using the generated power, the heat pump device 19 can perform a boiling operation for heating the hot water in the hot water storage tank 10 via the heating circulation circuits 26, 27, 28. On the contrary, when the sunshine condition is not so good, the photovoltaic power generation device 3 cannot generate sufficient power by receiving sunlight, so that the hot water storage type hot water supply device 1 uses the electric power supplied from the commercial power source 49. It is used to perform the boiling operation.

In order to perform the boiling operation using the electric power generated by the solar power generation as described above, at least the generated electric power value is large to some extent (specifically, the electric power value supplied to the hot water storage type hot water supply device 1, that is, the generated electric power value). It is necessary that the surplus power value obtained by subtracting the load power consumption value consumed by the electric load device 6 excluding the hot water storage type hot water supply device 1 is large to some extent (described later). Therefore, in order to smoothly perform the boiling operation using the electric power generated by the photovoltaic power generation, the photovoltaic power generation device linked hot water storage type hot water supply system 100 includes the HEMS device 7 and the control device 31, respectively, as shown in FIG. A functional unit is provided.

That is, as shown in FIG. 2, the HEMS device 7 includes a weather information acquisition unit 32A, a generated power prediction unit 32B, a load power consumption prediction unit 32C, a device power consumption prediction unit 32D, and a surplus power prediction unit. 32E is provided. Further, the control device 31 includes a surplus boiling determination unit 33A, a surplus boiling control unit 40, a surplus boiling capacity calculation unit 37, a hot water amount learning unit 34, a required heat amount determination unit 35, and night boiling. A capacity calculation unit 36, a corrected night boiling capacity calculation unit 38, a night boiling control unit 39, and a daytime boiling increase control unit 42 are provided. The display control unit 33B will be described later. Further, the allocation (allocation) of each of these functional units in the HEMS device 7 and the control device 31 is not limited to the illustrated example, and for example, by enhancing the communication content between the HEMS device 7 and the control device 31. A part or all of the functions of the above-mentioned functional units 32A to 32E provided in the HEMS device 7 may be provided in the control device 31 of the hot water storage type hot water supply device 1, or conversely, the control device 31 may be provided. A part or all of the functions of the above-mentioned functional units 33A, 33B, 34 to 42 provided in the HEMS device 7 may be provided in the HEMS device 7.

The weather information acquisition unit 32A (corresponding to the weather information acquisition means) acquires weather information (for example, weather forecast information, sunshine duration information, etc.) emitted from, for example, the server 9. Note that weather information as publicly known information may be acquired from an appropriate location other than the server 9.

The generated power prediction unit 32B (corresponding to the generated power prediction means) acquires the amount of generated power for each unit time that has fluctuated over time in the past predetermined period, which has been acquired from the photovoltaic power generation device 3, and the weather information acquisition unit 32A. Based on the determined weather information, a specific period to be determined (in this example, for example, one day following the desired date on which the control procedure according to the flow shown in FIGS. 11 to 15 described later is executed. The predicted value of the generated power for each unit time in the generated power behavior of the photovoltaic power generation device 3 that fluctuates with time in the "next day") is determined (calculated).

The load power consumption prediction unit 32C (corresponding to the load power consumption prediction means) consumes the electric load device 6 such as an air conditioner in the building for each unit time in the past predetermined period, which has been acquired from the distribution board 2. Based on the amount of electric power, the predicted value (including the case where the time fluctuates and the case where it does not fluctuate with time) representing the power consumption of the electric load device 6 for each unit time on the next day is determined (calculated).

The device power consumption prediction unit 32D (corresponding to the device power consumption prediction means) is based on the power consumption of the hot water storage type hot water supply device 1 for each unit time in the past predetermined period, which has been acquired from the hot water storage type hot water supply device 1. The predicted value (including the case where the time fluctuates and the case where the time fluctuates) is determined (calculated), which represents the power consumption of the hot water storage type hot water supply device 1 for each unit time on the next day.

The surplus power prediction unit 32E (corresponding to the surplus power prediction means) has the generated power predicted value determined by the generated power prediction unit 32B and the load used power predicted value determined by the load used power prediction unit 32C. Based on (specifically, the load consumption power prediction value is subtracted from the generated power prediction value), the surplus power prediction value for each unit time in the building in the time-varying surplus power behavior on the next day is determined. (calculate.

The surplus boiling determination unit 33A determines the surplus power prediction value for each unit time of the next day determined by the surplus power prediction unit 32E, and the surplus power prediction value for each unit time of the next day determined by the device power consumption prediction unit 32D. Compare with the estimated power consumption of the device. Then, on the next day, whether or not there is a time zone (boiling possible time zone) in which the surplus power predicted value continuously exceeds the device used power predicted value for a predetermined length or more, that is, , It is determined whether or not the boiling operation using the electric power generated by the photovoltaic power generation can be performed on the next day.

A specific example of this determination will be described with reference to FIG. In FIG. 3, the horizontal axis is the time axis on which the time of the next day is engraved, such as "0:00", "1:00", ..., "23:00", "24:00", and the vertical axis is Taking the electric energy [kWh], the predicted value of the electric energy generated by the solar power generation device 3 (predicted by the generated electric power prediction unit 32B) and the predicted value of the load used power (load use) of the electric load device 6 on the next day. It is a graph that conceptually represents an example of the power consumption prediction unit 32C) and the device power consumption prediction value (prediction by the device power consumption prediction unit 32D) in the hot water storage type hot water supply device 1. As will be described in detail later, the determination is performed on the desired day (hereinafter, appropriately referred to as “determination date”) which is the day before the next day or at an appropriate timing on the next day (first timing, which will be described later in this example). Since it is performed at 23:00), the horizontal axis also shows "23:00" on the determination day before "0:00" on the next day.

As shown in FIG. 3, this example is an example in which the weather on the next day is predicted to be fine based on the weather information acquired by the weather information acquisition unit 32A. That is, as shown by a broken line graph with a solid line in the figure, the predicted value of the amount of power generated by the solar power generation device 3 on the next day changes from 0:00 to 6:00 at almost 0 [kWh], but at sunrise. It gradually rises with (between 6:00 and 7:00), 0.2 [kWh] at 7:00, 1.0 [kWh] at 8:00, 1.5 [kWh] at 8:30, After that, it passed 1.8 [kWh] at 9:00, 2.5 [kWh] at 10:00, 3.2 [kWh] at 11:00, and 3.3 [kWh] at 12:00. It reaches its peak. After that, the amount of power generated by the photovoltaic power generation device 3 gradually decreases with the shade of the sun, reaching 3.2 [kWh] at 13:00, 2.5 [kWh] at 14:00, and then 15:00. 1.8 [kWh] at 15:30, 1.5 [kWh] at 15:30, 1.0 [kWh] at 16:00, 0.2 [kWh] at 17:00, and then sunset (17:00 to 17:00). After 18:00, it will be almost 0 [kWh] until 24:00.

On the other hand, as shown by the gray bar graph in the figure, the predicted value of the load power consumption in the electric load device 6 is 0.5 [kWh] throughout the day between 0:00 and 24:00 on the next day. ing. As a result, as shown in FIG. 3, the predicted value of the surplus power represented by "the amount of power generated by the solar power generation device 3"-"the amount of power used by the load in the electric load device 6" is 8: the next day. 0.5 [kWh] occurs for the first time at 00, 1.0 [kWh] at 8:30, 1.3 [kWh] at 9:00, 2.0 [kWh] at 10:00, and 11:00. After 2.7 [kWh], it reaches its maximum at 2.8 [kWh] at 12:00. After that, it gradually decreased, 2.7 [kWh] at 13:00, 2.0 [kWh] at 14:00, 1.3 [kWh] at 15:00, and 1.0 [kWh] at 15:30. , It becomes 0.5 [kWh] at 16:00.

In response to the time fluctuation of the surplus power as described above, in this example, the predicted value of the power used by the hot water storage type hot water supply device 1 when it is operated is 1 [kWh] per unit time. As a result, the surplus boiling determination unit 33A has "surplus power" ≥ "power used by the hot water storage type hot water supply device 1" and can secure a continuous operation time of 3 hours or more from 8:30 to 15:30. It is determined that the hot water storage type hot water supply device 1 can be operated by the surplus electric power in the time zone up to (boilable time zone). In FIG. 3, as a result of such a determination, the boiling operation of the hot water storage type hot water supply device 1 is performed from 11:00 to 15:00 in the boiling possible time zone (hereinafter, appropriately, "boiling time". The case where it is set to be executed by (referred to as "band") (details will be described later) is shown side by side as an example (see the black bar graph). The first timing, the second timing, the daytime notice mark, etc. in the figure will be described in detail later.

As described above, in the present embodiment, the generated power prediction unit 32B determines the generated power value in the photovoltaic power generation device 3 in response to the weather information acquired by the weather information acquisition unit 32A for the next day. Based on this, the surplus boiling determination unit 33A can determine whether or not the boiling operation using solar power generation can be executed.

The example shown in FIG. 3 is an example of a case where the weather on the next day is predicted to be fine as described above (as a result, it is determined that power generation by the solar power generation is possible). On the other hand, for example, FIG. 4 shows an example in which the weather on the next day is predicted to be rainy or cloudy (there is almost no solar radiation by the sun) based on the weather information acquired by the weather information acquisition unit 32A. In this case, as shown by the solid line graph in the figure, the predicted value of the amount of power generated by the photovoltaic power generation device 3 changes at almost 0 [kWh] from 0:00 to 8:00, and with the sunrise. Although it rises slightly, it is 0.1 [kWh] at 9:00, 0.3 [kWh] at 10:00, 0.5 [kWh] at 11:00, and 0.6 [kWh] at 12:00. Even at the peak at 13:00 after passing through, it remains at about 0.7 [kWh]. After that, the amount of power generated by the photovoltaic power generation device 3 is 0.6 [kWh] at 14:00, 0.5 [kWh] at 15:00, 0.3 [kWh] at 16:00, and 17:00. It becomes 0.1 [kWh], and after 18:00, it becomes almost 0 [kWh] until 24:00. As a result, as shown in FIG. 4, the predicted value of the surplus power represented by "the amount of power generated by the photovoltaic power generation device 3"-"the amount of power used by the load in the electric load device 6" is 12: the next day. It occurs only slightly between 00 and 14:00, and its maximum value remains at about 0.2 [kWh]. In such a case, the surplus boiling determination unit 33A determines that the boiling operation of the hot water storage type hot water supply device 1 by the surplus electric power is impossible. In FIG. 4, as a result of such a determination, the boiling operation of the hot water storage type hot water supply device 1 is performed as usual by the power supply from the commercial power source 49 (without using the electric power generated by photovoltaic power generation). Is set to be executed in an appropriate time zone (3:00 to 7:00 in this example) among inexpensive nighttime zones (23:00 to 7:00 in this example) as an example. Shown below (see black bar graph; details will be described later). Similar to the above, the first timing and the daytime notice mark in the figure will be described in detail later.

Next, the detailed configuration of the remote controller device 50 is shown in FIG. In FIG. 5, the remote control device 50 uses the display unit 60 (corresponding to the display means) and the “bath automatic” for automatically filling the hot water from the hot water storage tank 10 into the bathtub and keeping the hot water warm after the hot water is filled. The switch 71, the "call" switch 72 for making a call in the bathroom, the speaker 73, the + side-side operation settings of various numerical values such as the hot water supply temperature, and the upward direction of the cursor in the display unit 60. -The cross key 74 for performing leftward, downward, and sideways movement operations, the "menu / decision" switch 75, and the boiling operation by manual operation are performed to increase the amount of hot water stored in the hot water storage tank 10 by a predetermined amount. The "tank hot water addition" switch 76 for this purpose and the automatic hot water addition function for boiling the daytime boiling capacity when the amount of hot water stored in the hot water storage tank 10 decreases below a predetermined threshold value are manually operated. Various guides including explanations of multiple operation modes (detailed explanations are omitted) such as "additional hot water pause" switch 77 and "eco mode" prepared in advance, which are paused by operation (only on the day of operation). It has an "eco guide" switch 78 for displaying on the display unit 60, and a "return" switch 79 for returning the display screen displayed on the display unit 60 to the previous display screen.

The display unit 60 is configured so that a plurality of display screens, each of which displays a predetermined content, can be switched. On the illustrated display screen 60A, the date and time display unit 61 that displays the current date and time (22:30 on Friday, May 31 in this example) and the temperature of the hot water in the bathtub (40 ° C. in this example). The bath temperature display unit 62 for displaying, the hot water supply temperature display unit 63 for displaying the hot water supply temperature (40 ° C. in this example), the hot water storage amount display unit 64 for displaying the hot water storage amount in the hot water storage tank 10, and the above. Which mode is the network display unit 65 indicating that the server 9 is connected to the server 9 via the network communication network 8 or the plurality of modes (in this example, "Random energy saving" mode. Details are as follows. It has a mode display unit 66 indicating (omitted).

The hot water storage amount display unit 64 displays the hot water storage amount in the hot water storage tank 10 in response to the detection result of the hot water storage temperature sensor 18 under the control of the display control unit 33B. In the illustrated example, the hot water storage amount display unit 64 can display the hot water storage amount in five stages by five display elements 64A to 64C. That is, when almost all of the hot water storage tank 10 is hot water in a sufficiently heated state (the hot water storage amount is full), all the display elements 64A, 64B, 64C, 64D, 64E is lit and displayed. On the contrary, when the hot water storage amount in the hot water storage tank 10 is almost empty, all the display elements 64A, 64B, 64C, 64D, 64E are turned off, and as the hot water storage amount gradually increases from this state. , Display element 64B, display element 64C, display element 64D, and display element 64E are added in this order from the display element 64A in the lower row and displayed in the store. The illustrated example shows a state in which the amount of hot water stored is about 1/5 of the total capacity in the hot water storage tank 10, and only the lowermost display element 64A of the display elements 64A to 64E is lit and displayed. At the same time, the remaining four display elements 64B, 64C, 64D, and 64E are turned off (in the figure, they are represented by broken lines for clarity).

Here, in the example shown in FIG. 5, the amount of hot water stored in the hot water storage tank 10 is 1 / of the full tank due to the use of hot water during housework or bathing (see the time display at 22:30 on the date and time display unit 61). It shows the case where it is reduced to about 5 (only the display element 64A at the bottom of the hot water storage amount display unit 64 is lit). As described above, in the present embodiment, if the expected sunshine conditions are good on the next day (June 1 of the day following May 31 in this example), the next day (June 1). ), The boiling operation can be performed during the boiling time zone by using the electric power generated by the photovoltaic power generation device 3. If the expected sunshine conditions on the next day (June 1) are not very good, the electricity charge unit price on the next day (June 1) is low at night (23:00 to 7:00 in this example). ), The boiling operation is performed using the electric power supplied from the commercial power source 49.

First, the remote controller device at 7:30 the next morning (the morning of the next day) when the sunshine conditions expected the next day are not so good as described above and the entire amount of boiling operation is performed during the nighttime zone. FIG. 6 shows an example of display on the display unit 60 of 50. As a result of the boiling operation of the hot water in the hot water storage tank 10 during the nighttime zone (from 3:00 to 7:00 in the example described with reference to FIG. 4), June 1 as shown in FIG. At the stage of 7:30 in the morning, the amount of hot water stored in the hot water storage tank 10 is full, and correspondingly, all the display elements 64A to 64E of the hot water storage amount display unit 64 are lit.

On the other hand, when the expected sunshine condition on the next day is good as described above and the boiling operation is performed during the boiling time zone of the daytime zone of the next day, the remote controller device 50 at 7:30 the next morning. The display on the display unit 60 is different from the content shown in FIG. That is, in the present embodiment, the amount of boiling planned to be boiled in the boiling time zone on June 1 (11:00 to 15:00 in the example described with reference to FIG. 3). It is possible to reduce the amount of boiling due to the boiling operation by the electric power from the commercial power source 49 during the nighttime zone. As a result, as it is, as shown in FIG. 7 as a comparative example, all the hot water in the hot water storage tank 10 is in a state of being boiled even at the stage of 7:30 am on June 1st. However, unheated water remains in the hot water storage tank 10 to some extent (= the amount of boiling water due to the boiling operation in the boiling time zone by the electric power of the photovoltaic power generation). That is, in this example, the amount of hot water stored in the hot water storage tank 10 (unlike FIG. 6) remains at about 3/5 of the full state, and correspondingly, all display elements 64A to 64E of the hot water storage amount display unit 64 Of these, only the three display elements 64A, 64B, and 64C from the bottom are lit, and the remaining two display elements 64D, 64E are extinguished.

In this case, the user unknowingly contrasts with the display state as shown in FIG. 6, and the display elements 64A to 64E are not in the fully lit state even though the night zone is over (= the hot water storage). I was suspicious of the existence of unheated water in the tank 10), or I was afraid that the hot water would run out when used after 7:30, so I turned on the "tank hot water addition" switch 76 in the daytime when the electricity rate was high. There is a possibility that a predetermined amount of the boiling operation is executed by manual operation (= so-called manual hot water addition), or it may be misunderstood as a malfunction of the hot water storage type hot water supply device 1.

Therefore, according to the present embodiment, as shown in FIG. 8, the boiling operation based on the photovoltaic power generation is announced by the control of the display control unit 33B (corresponding to the display control means) provided in the control device 31. The mark M (corresponding to the daytime notice display; hereinafter appropriately referred to as the “daytime notice mark”) is displayed on the display screen 60A. That is, in the present embodiment, the determination by the surplus boiling determination unit 33A is performed during the nighttime period (this example) from the determination date (May 31 in this example) to the next day (June 1 in this example). Then, from 23:00 to 7:00), a predetermined timing (the first timing. This example) between the night boiling start time (see step S62 of FIG. 13 described later) when the night boiling, which will be described later, is started. Then, it will be held at 23:00 on May 31 (see the flow of FIGS. 3 and 4 described above and FIG. 12 described later). Then, the display of the daytime warning mark M by the display unit 61 is the end time (this example) at which the first timing or later and the nighttime zone (23:00 to 7:00 in this example) ends. Then, go to a predetermined timing (corresponding to the second timing. For example, 3:00 on June 1; see the flow of FIG. 3 described above and FIG. 12 described later) until 7:00 on June 1). Will be. The display of the daytime warning mark M started at the second timing is continuously displayed until it disappears, which will be described later.

After the boiling operation in the boiling time zone (11:00 to 15:00 in this example, see FIG. 3) by the electric power of the photovoltaic power generation is completed with the daytime boiling notice mark M displayed. FIG. 9 shows an example of display on the display unit 60 of the remote control device 50 at 16:30 on the next day. As shown in the figure, as a result of the boiling operation of the hot water in the hot water storage tank 10 from 11:00 to 15:00, the amount of hot water stored in the hot water storage tank 10 became full, and June shown in FIG. The display elements 64D and 64E of the hot water storage amount display unit 64, which were not lit at 7:30 in the morning of the 1st, are lit, so that all the display elements 64A to 64E are lit. Further, when the boiling operation in the boiling time zone is completed at 15:00, the daytime boiling notice mark M (see FIG. 8) that has been displayed up to that point disappears.

At this time, in the present embodiment, while the daytime boiling notice mark M is displayed on the display screen 60A of the display unit 60 as described above, at the same time, the boiling time is controlled by the display control unit 33B. A time display T (11:00 in this example, hereinafter appropriately referred to as “boiling start time display”) indicating the start time of the band boiling operation is performed on the display screen 60A. That is, the boiling start time display T starts to be displayed at the second timing together with the daytime boiling notice mark M, and disappears when the boiling operation in the boiling time zone is completed at 15:00.

The display unit 60 of the remote control device 30 has a so-called power saving (sleep) function, and the backlight is turned off during sleep and when the user performs some operation on the remote control device 30. It may be configured to light up (the display unit 60 as a whole becomes bright). In this case, as described above, during the period from the second timing to the completion of the boiling operation in the boiling time zone, the backlight is turned off (the entire display unit 60 is dark) when there is no operation by the user. The display of the daytime boiling mark M and the boiling start time display T is added to the display screen 60A. Alternatively, during the period from the second timing to the completion of the boiling operation in the boiling time zone, the backlight is turned on without any operation by the user, and the entire display unit 60 is displayed in the display screen 60A in a bright state. The display of the daytime boiling mark M and the boiling start time display T may be added (the display of the daytime boiling mark M and the boiling start time display T is added at the second timing). The backlight may be brightened only immediately after that). Further, when some operation is performed by the user, as shown in FIG. 10, the window 60W is displayed (or switched to another independent screen) so as to cover or interrupt the display screen 60A shown in FIG. It may be configured). In the window 60W shown in FIG. 10, the text message 80 "When 11:00 on June 1st today, the hot water is boiled by solar power generation" is displayed, and the user is notified of the boiling from 11:00. It is designed to reliably notify that the boiling operation is performed by the electric power of the photovoltaic power generation in the upper time zone. Instead of the daytime boiling mark M and the boiling start time display T in FIG. 8, the window 60W or a display area having an equivalent display function may be displayed. In this case, the window 60W corresponds to the display of the daytime notice and the display of the start time of the boiling operation.

Further, the display function provided in the display screen 60A of the display unit 60 is provided by an appropriate display (corresponding to the display means in this case) provided in a part other than the remote control device 50, for example, the control device 31 or the HEMS device 7. You may have it. In this case, a display control unit (corresponding to the display control means in this case) having a function equivalent to that of the display control unit 33B is provided in the control device 31 or the HEMS device 7, and the display is subjected to the same display control as described above. You may do it.

Next, the control procedure executed by the HEMS device 7 and the control device 31 in order to realize the above method will be described with reference to the flowcharts of FIGS. 11, 12, 13, 14, and 15.

FIG. 11 shows a control procedure executed by the HEMS device 7. In FIG. 11, first, in step S110, the HEMS device 7 has the start time (23:00 in this example, the same applies hereinafter) of the nighttime zone (23:00 to 7:00 in this example) where the unit price of electricity is low. Determine if it has become. The determination is not satisfied (S110: NO) until the nighttime start time is reached, the loop waits, and when the nighttime start time is reached, the determination is satisfied (S110: YES), and the process proceeds to step S120.

In step S120, the HEMS device 7 acquires the weather information from the server 9 by the weather information acquisition unit 32A. The weather information acquisition unit 32A periodically acquires the weather information from the server 9 and stores the latest data in an appropriate place, and when this flow is started, at the timing of step S120, The weather information data stored in the appropriate place may be read out and used.

After that, the process proceeds to step S130, and the HEMS device 7 is based on the amount of power generated by the photovoltaic power generation device 3 for each unit time in the past predetermined period and the weather information acquired in step S120 by the generated power prediction unit 32B. , The predicted value of the generated power for each unit time of the photovoltaic power generation device 3 in a specific period (the next day in this example; the same applies hereinafter) is determined (calculated).

Then, in step S140, the HEMS device 7 is subjected to the electric load device on the next day based on the load power consumption amount of the electric load device 6 for each unit time in the past predetermined period by the load power consumption prediction unit 32C. Determine (calculate) the estimated load power consumption for each unit time of 6.

After that, in step S150, the HEMS device 7 is subjected to the hot water storage type hot water supply on the next day based on the device power consumption amount of the hot water storage type hot water supply device 1 for each unit time in the past predetermined period by the device power consumption prediction unit 32D. Determine (calculate) the estimated device power consumption value for each unit time of the device 1. As already described, the control device 31 of the hot water storage type hot water supply device 1 may have a function equivalent to that of the device power consumption prediction unit 32D, and may determine the device power consumption prediction value. At that time, the control device 31 itself may learn its own power consumption by a known method, or may determine its own power consumption as a constant value. In this case, in step S180 described later, only the predicted surplus power value (described later) is output to the control device 31, and in step S10 of FIG. 12 described later, only the predicted surplus power value (described later) is acquired by the control device 31. Will be done.

Then, in step S160, the HEMS device 7 uses the generated power predicted value determined in step S130 by the surplus power prediction unit 32E and the load use of the electric load device 6 for each unit time in step S140. Based on the predicted power value, the predicted surplus power for each unit time in the building on the next day is determined (calculated).

After that, in step S180, the HEMS device 7 outputs the device usage power prediction value determined in step S150 and the surplus power prediction value determined in step S160 to the control device 31, and ends this flow.

12 to 15 show control procedures executed by the control device 31. First, in FIG. 12, in step S2, the control device 31 has a boiling impossibility flag F indicating a case where the boiling operation of the hot water storage type hot water supply device 1 by the surplus electric power is impossible, and the lunch boiling notice mark. The mark display flag Fd indicating that M is displayed and the mark display flag Fd are initialized to 0, respectively.

After that, in step S5, the control device 31 determines whether or not the start time (23:00) of the night zone has come, as in step S110 of FIG. The determination is not satisfied until the night zone start time is reached (S5: NO), the loop waits, and when the night zone start time is reached, the determination is satisfied (S5: YES), and the process proceeds to step S10.

In step S10, the control device 31 acquires the device used power prediction value and the surplus power prediction value output in step S180 of FIG. After that, the process proceeds to step S25. In step S25, the control device 31 uses a known method using an average, standard deviation, or the like based on the daily learning hot water amount of the past predetermined period that has been learned by the hot water amount learning unit 34 by the required heat amount determining unit 35. Is used to determine (calculate) the required amount of heat for the next day. The required amount of heat may be calculated as the required amount of hot water converted to a predetermined temperature (for example, 43 [° C.]).

After that, in step S30, the control device 31 may have other conditions such as the required hot water amount determined in step S25 by the required heat quantity determining unit 35 and the outside air temperature (or the water supply temperature) acquired in step S10. ), The boiling target temperature is determined. The boiling target temperature is set as low as possible, for example, between 65 [° C.] and 75 [° C.], but particularly when the required amount of hot water is large, when the outside air temperature is low, or when the water supply temperature is high. If it is low, it is set higher (compared to other cases).

Then, in step S35, the control device 31 divides the required heat amount determined in step S30 by the nighttime boiling capacity determination unit 36 by the temperature difference between the boiling target temperature and the water supply temperature, and the necessary Converted to capacity, it is the night boiling capacity when performing night boiling. When the required capacity calculated in this way exceeds the capacity of the hot water storage tank 10, the capacity of the hot water storage tank 10 may be used as the night boiling capacity. After that, the process proceeds to step S40.

In step S40, the control device 31 determines the surplus power prediction value for each unit time of the next day acquired in step S10 by the surplus boiling determination unit 33A, and the device usage power prediction for each unit time of the next day. Compare the value with. Then, on the next day, whether or not the boiling operation using the electric power generated by the photovoltaic power generation can be performed on the next day (predetermined length, that is, for 3 hours or more in the above example, the surplus electric power predicted value is continuously obtained. Whether or not there is a boiling time zone that is equal to or greater than the predicted power consumption value of the device) is determined. If the boiling time zone is not found, the determination is not satisfied (S40: NO), and the process proceeds to step S46 described later. If the boiling time zone is found, the determination is satisfied (S40: YES), and the process proceeds to step S42. The function of the surplus boiling determination unit 33A of the control device 31 that executes this step S40 functions as a daytime boiling determination means. Further, step S40 may be executed at a timing before the step S5 (along with the previous steps S2 and S10 to S35), that is, before the start time of the night zone on the determination day. Good. In this case, the timing corresponds to the first timing.

In step S42, the control device 31 actually performs the boiling operation (surplus boiling) from the boiling possible time zone found in step S40 by the boiling determination unit 33A by an appropriate method. Top time) is decided. After that, the process proceeds to step S45.

In step S45, the control device 31 uses the excess boiling capacity calculation unit 37 to heat the heat pump device 19 by the hot water storage type hot water supply device 1 during the surplus boiling time determined in step S42. The excess boiling capacity capable of boiling to the boiling target temperature is calculated based on the magnitude of the capacity.

Then, in step S50, the control device 31 subtracts the surplus boiling capacity calculated in step S45 from the night boiling capacity calculated in step S35 by the corrected night boiling capacity calculation unit 38. , The corrected night boiling capacity that actually boils in the night zone is calculated. After that, the process proceeds to step S55 described later.

On the other hand, in step S46, in which the determination in step S40 is not satisfied and the transition is made, the control device 31 cannot perform the boiling operation of the hot water storage type hot water supply device 1 by the surplus power with the boiling impossible flag F. Let 1 represent the case.

After that, in step S48, the control device 31 sets the corrected night boiling capacity = 0 by the corrected night boiling capacity calculation unit 38. Then, the process proceeds to step S55.

In step S55, the control device 31 is the capacity of the amount of hot water stored (remaining hot water capacity) that can be regarded as hot water in a sufficiently heated state based on the detection results of the plurality of hot water storage temperature sensors 18 by the night boiling control unit 39. Is calculated.

Further, in the subsequent step S60, the control device 31 calculates the start time of night boiling by the night boiling control unit 39.

That is, when the determination in step S40 is satisfied (S40: YES) and the process proceeds to step S60 through steps S42 to S50 and step S55, the night boiling control unit 39 calculates in step S50. The boiling time required to boil the capacity obtained by subtracting the residual hot water capacity calculated in step S55 from the corrected nighttime boiling capacity is calculated, and boiling is performed at the end time of the nighttime zone (for example, 7:00). The night boiling start time, which is appropriate for completion (eg, by subtracting the required boiling time from the night zone end time), is calculated.

On the other hand, if the determination in step S40 is not satisfied (S40: NO) and the process proceeds to step S60 through steps S46, S48, and S55, the night boiling control unit 39 causes the step S35 to move to step S60. The boiling time required to boil the capacity obtained by subtracting the residual hot water capacity calculated in step S55 from the calculated nighttime boiling capacity is calculated, and the boiling time is calculated at the end time of the nighttime zone (for example, 7:00). Calculate the nighttime boiling start time appropriate to complete (eg, by subtracting the required boiling time from the nighttime end time).

Then, in step S62 of FIG. 13, the control device 31 determines whether or not the time (current time) at this time is the night boiling start time calculated in step S60 by the night boiling control unit 39. judge. If the night boiling start time is not reached, the determination is not satisfied (S62: NO), and the process proceeds to step S63.

In step S63, the control device 31 cannot perform the boiling operation of the hot water storage type hot water supply device 1 by the display control unit 33B whether or not the boiling impossible flag F is 1 (that is, the surplus electric power is used). Whether or not it is determined to exist) is determined. If F = 1, the determination is satisfied (S63: YES), and the process returns to step S62 to repeat the same procedure. If F = 0, the determination is not satisfied (S63: NO), and the process proceeds to step S64.

In step S64, the control device 31 uses the display control unit 33B to set the current time to the display start timing of the daytime warning mark M (that is, the second timing. In the above example, 3:00; the same applies hereinafter). It is determined whether or not it has become. If the display start timing is not reached, the determination is not satisfied (S64: NO), and the process returns to step S62 to repeat the same procedure. When the display start timing is reached, the determination is satisfied (S64: YES), and the process proceeds to step S66.

In step S66, the control device 31 outputs a notice display control signal for displaying the daytime warning mark M to the display unit 60 of the remote control device 50 by the display control unit 33B. As a result, as shown in FIG. 8, on the display screen 60A, the daytime boiling notice mark M and the start time of the surplus boiling time determined in step S42 (11:00 in this example) are set. The boiling start time display T representing the corresponding start time is displayed (display start). Then, the process proceeds to step S68.

In step S68, the control device 31 sets the mark display flag Fd to 1 by the display control unit 33B. After that, the process returns to step S62, and the same procedure is repeated.

On the other hand, in step S62, if the current time is the night boiling start time, the determination is satisfied (S62: YES), and the process proceeds to step S200.

In step S200, the control device 31 performs the night boiling process by the night boiling control unit 39. The detailed procedure of this step S200 is shown in FIG.

In FIG. 14, first, in step S215, the control device 31 is subjected to the night boiling control unit 39 by the heat pump device 19 of the hot water storage type hot water supply device 1 (specifically, the compressor 20, the blower 24, and the heating). A night boiling operation is performed in which water taken out from the lower part of the hot water storage tank 10 is heated to the boiling target temperature determined in step S30 and laminated sequentially from the upper part of the hot water storage tank 10 by controlling the circulation pump 28 and the like). Start.

After that, in step S216, the control device 31 boil the corrected night boiling capacity calculated in step S50 after the night boiling operation is started by the night boiling control unit 39 as described above. It is determined whether or not this is detected by the hot water storage temperature sensor 18 (or the current time during operation is the end time of the night zone). If the corrected night boiling capacity is not boiled (or the end time of the night zone is not reached), the determination is not satisfied (S216: NO), and the process proceeds to step S223.

In step S223, the control device 31 determines whether or not the mark display flag Fd is 1 (that is, whether or not the daytime boiling notice mark M and the boiling start time display T have already been made by the display control unit 33B. ) Is judged. If Fd = 1, the determination is satisfied (S223: YES), the process returns to step S216, and the same procedure is repeated. If Fd = 0, the determination is not satisfied (S223: NO), and the process proceeds to step S224.

In step S224, similarly to step S64, the control device 31 determines whether or not the current time has reached the display start timing (the second timing) by the display control unit 33B. If the display start timing is not reached, the determination is not satisfied (S224: NO), and the process returns to step S216 to repeat the same procedure. When the display start timing is reached, the determination is satisfied (S224: YES), and the process proceeds to step S226.

In step S226, similarly to step S66, the control device 31 outputs a notice display control signal for displaying the daytime warning mark M on the display unit 60 by the display control unit 33B. As a result, similarly to the above, the daytime boiling notice mark M and the boiling start time display T are displayed on the display screen 60A. After that, the process proceeds to step S228.

In step S228, as in step S68, the control device 31 sets Fd = 1 by the display control unit 33B. After that, the process returns to step S216 and the same procedure is repeated.

On the other hand, in step S216, when the corrected night boiling capacity is boiled (or the end time of the night zone is reached), the determination is satisfied (S216: YES), and it is considered that the night boiling operation is completed. Then, the process proceeds to step S218.

In step S218, the control device 31 controls the heat pump device 19 by the night boiling control unit 39, and stops the night boiling operation started in step S215. At this time, unheated water remains in the lower part of the hot water storage tank 10 by the same volume as the excess boiling capacity calculated in step S45. After that, the process returns to FIG. 13 and proceeds to step S71.

In step S71, similarly to step S63, the control device 31 is unable to perform the boiling operation of the hot water storage type hot water supply device 1 by whether or not the boiling impossible flag F is 1 (that is, the surplus power is used. Whether or not it is determined) is determined. If F = 1, the determination is satisfied (S71: YES), and the process proceeds to step S80 described later. If F = 0 still remains, the determination is not satisfied (S71: NO), and the process proceeds to step S72.

In step S72, the control device 31 determines whether or not the end time (7:00) of the night zone has come. If the end time of the night zone is not reached, the determination is not satisfied (S72: NO), and the process proceeds to step S73.

In step S73, as in step S223, the control device 31 uses the display control unit 33B to determine whether or not the mark display flag Fd is 1 (that is, the daytime boiling notice mark M and the boiling start time have already been set. Whether or not the display T has been made) is determined. If Fd = 1, the determination is satisfied (S73: YES), the process returns to step S72, and the same procedure is repeated. If Fd = 0, the determination is not satisfied (S73: NO), and the process proceeds to step S74.

In step S74, similarly to step S224, the control device 31 determines whether or not the current time has reached the display start timing (the second timing) by the display control unit 33B. If the display start timing is not reached, the determination is not satisfied (S74: NO), and the process returns to step S72 to repeat the same procedure. When the display start timing is reached, the determination is satisfied (S74: YES), and the process proceeds to step S76.

In step S76, similarly to step S226, the control device 31 outputs a notice display control signal for displaying the daytime warning mark M on the display unit 60 by the display control unit 33B. As a result, similarly to the above, the daytime boiling notice mark M and the boiling start time display T are displayed on the display screen 60A. Then, the process proceeds to step S78.

In step S78, as in step S228, the control device 31 sets Fd = 1 by the display control unit 33B. After that, the process returns to step S72 and the same procedure is repeated.

On the other hand, if the end time of the night zone is reached in step S72, the determination is satisfied (S72: YES), and the process proceeds to step S300. If the second timing, which is the display start timing, is set to the same time as the night zone end time (7:00 in this example), the step is performed after the determination in step S72 is satisfied. Before moving to S300, the same procedure as in step S74, step S76, and step S78 may be executed.

In step S300, the control device 31 performs the surplus boiling process by the surplus boiling control unit 40. The detailed procedure of this step S300 is shown in FIG.

In FIG. 15, first, in step S320, the control device 31 uses the surplus boiling control unit 40 to determine the start time (surplus boiling) of the boiling time division in which the time (current time) at this time is determined in step S42. Start time. In the above example, it is determined whether or not it is 11:00). The determination is not satisfied until the surplus boiling start time is reached (S320: NO), and the loop waits. If the surplus boiling start time is reached, the determination is satisfied (S320: YES), and the process proceeds to step S322.

In step S322, the control device 31 uses the surplus boiling control unit 40 to increase the heat pump device 19 of the hot water storage type hot water supply device 1 (specifically, the compressor 20, the blower 24, the heating circulation pump 28, etc.). The surplus boiling operation is started in which the water taken out from the lower part of the hot water storage tank 10 is heated to the boiling target temperature determined in step S30 and laminated sequentially from the upper part of the hot water storage tank 10.

After that, in step S324, the control device 31 boiled the surplus boiling capacity calculated in step S45 after the surplus boiling operation was performed by the surplus boiling control unit 40 as described above. Is detected by the hot water storage temperature sensor 18 (or the current time during operation is the end time of the boiling time division). When the surplus boiling capacity is boiled (or when the end time of the boiling time division is reached), the determination is satisfied (S324: YES), and it is considered that the surplus boiling operation is completed, and step S326 Move on to.

In step S326, the control device 31 controls the heat pump device 19 by the surplus boiling control unit 40, and stops the surplus boiling operation started in step S322. At this time, as described above, when the nighttime boiling operation is completed, unheated water remains in the lower part of the hot water storage tank 10 by the same amount as the excess boiling capacity, so that the excess boiling operation is started before the start. Even if no hot water is supplied, the surplus boiling operation that fully utilizes the initially predicted surplus power can be continuously performed. Then, the process proceeds to step S328.

In step S328, the control device 31 stops the display control unit 33B from outputting the notice display control signal for displaying the daytime warning mark M to the display unit 60 of the remote control device 50. As a result, the daytime boiling notice mark M and the boiling start time display T that started in step S66, step S226, or step S76 disappear (display end). After the surplus boiling operation is completed as described above, the process returns to FIG. 13 and proceeds to step S96. The boiling start time display T may be extinguished at the timing of the start of excess boiling in step S322.

In step S96, the control device 31 uses the daytime boiling control unit 42 to set the time (current time) at this time to the end time (for example, 23:00) of the daytime zone (for example, 7:00 to 23:00). Judge whether or not it became. If the daytime zone end time is reached, the determination is satisfied (S96: YES), the process returns to step S2 shown in FIG. 12, and the same procedure is repeated. If the end time of the daytime zone is not reached, the determination is not satisfied (S96: NO), and the process proceeds to step S92.

In step S92, the control device 31 determines whether or not the hot water storage temperature sensor 18 at the uppermost portion of the hot water storage tank 10 has dropped to a predetermined hot water drainage danger temperature or lower by the daytime boiling increase control unit 42. If the temperature is higher than the hot water drainage danger temperature, the determination in step S92 is not satisfied (S92: NO), and the process returns to step S96 and the same procedure is repeated. If the temperature is equal to or lower than the dangerous temperature for running out of hot water, the determination in step S92 is satisfied (S92: YES), and it is considered that the hot water is running out, and the process proceeds to step S94.

In step S94, the control device 31 controls the heat pump device 19 by the daytime boiling increase control unit 42, and performs a hot water running out boiling operation for a predetermined time (for example, 1 hour) for eliminating the hot water running out. After that, the process returns to step S96 and the same procedure is repeated.

As described above, according to the photovoltaic power generation device linked hot water storage type hot water supply system 100 of the present embodiment, after the surplus boiling determination unit 33A acquires the surplus power expected value in step S10 (in other words, in other words). The end time of the night zone (June) from the determination date (May 31 in the above example, the same applies hereinafter) to the next day (June 1) after the surplus power expected value is determined in step S160. At the first timing (23:00 on May 31), until the night boiling start time for completing the boiling of the required amount of hot water on the next day by 7:00 on the 1st. It is determined whether or not the boiling operation can be performed during the boiling time of the next day. Then, when it is determined that it is feasible, the second timing (June 1) after the first timing and until the end time (7:00 on June 1) at which the night zone ends. At 3:00 on the day), the daytime notice mark M by the display unit 61 is displayed.

As a result, the user visually recognizes the daytime boiling notice mark M, and the reason why the unheated water remains in the hot water storage tank 10 is that the sun is subsequently generated in the daytime zone (specifically, the boiling time zone). It can be correctly recognized that this is because the boiling operation is executed by the electric power of the photovoltaic power generation. As a result, it is possible to avoid inconveniences such as execution of the boiling operation by the manual operation and misunderstanding as an operation failure. It is also possible to notify the user that the power of the photovoltaic power generation can be used on the next day, that is, that the weather information on the next day is generally good (sunny).

Further, in the present embodiment, in particular, in step S40 of FIG. 12, the surplus power prediction determined by using the generated power prediction value of the solar power generation device 3 and the load consumption power consumption prediction value of the electric load device 6. A more accurate and reliable determination is made by determining whether or not the boiling operation is possible in the boiling time zone of the next day based on the value and the estimated device power consumption value determined by the device power consumption prediction unit 32D. It can be performed.

Further, in the present embodiment, in particular, the weather information (weather forecast information, sunshine time information, etc.) for one day on the next day is acquired by the weather information acquisition unit 32A, and the surplus power prediction unit 32E corresponds to the solar power generation device 3 The surplus power predicted value is determined by using the generated power predicted value representing the temporal fluctuation of the generated power value in (1) and the load used power predicted value. In this way, using the known weather information provided from the server 9 (or further, it may be provided from the outside of the photovoltaic power generation device cooperative hot water storage type hot water supply system 100), a reliable surplus power predicted value. Can make a decision.

Further, in the present embodiment, in particular, the daytime boiling notice mark M disappears when the boiling operation in the boiling time zone is completed (see step S328 in FIG. 15). As a result, it is possible to make the user surely recognize that the boiling operation in the boiling time zone using the solar power generation, which has been announced, has been completed. In addition to when the boiling operation in the boiling time zone is completed, the daytime boiling notice is also given when the nighttime start time (23:00) is reached during the daytime boiling operation by the user's manual operation. The mark M and the boiling start time display T may be extinguished.

Further, in the present embodiment, in particular, when it is determined that the boiling operation in the daytime zone is impossible, the daytime boiling notice mark M is not displayed (see FIG. 6), so that the electric power of the photovoltaic power generation is generated on the next day. It is possible to make the user surely recognize that the boiling operation of the electric power is not performed, in other words, the weather information of the next day is not good.

Further, in the present embodiment, in particular, when it is determined that the boiling operation is possible in the boiling time zone, the boiling start time display T is further displayed in addition to the daytime boiling notice mark M. As a result, it is possible to reliably notify the user of the time when the boiling operation by the electric power of the photovoltaic power generation is started in the daytime. Further, the user's misunderstanding (further next day, the next day,) that the boiling start time display T disappears after the boiling operation starts (see step S328 in FIG. 15) so that the display state is displayed even after the boiling operation ends. That is, it is possible to avoid (misunderstanding that the start time of the boiling operation on June 2).

Further, in the present embodiment, in particular, the amount of hot water stored in the hot water storage tank is displayed by the hot water storage amount display unit 64. As a result, the reason why the amount of hot water stored in the hot water storage tank 10 is not full immediately after the end of the night zone (only the display elements 64A to C are displayed) is that the power of the photovoltaic power generation is generated in the daytime zone thereafter. It is possible to make sure that the user recognizes that the boiling operation is executed.

Further, in the present embodiment, in particular, the remote controller device 50 capable of manually instructing the execution of the predetermined amount of the boiling operation in the hot water storage type hot water supply device 1 is provided. As a result, in a configuration in which the user can manually instruct the execution of the boiling operation via the remote controller 50, the user is surely recognized that the boiling operation by the electric power of the photovoltaic power generation is executed in the daytime. , It is possible to surely prevent the boiling operation by the manual operation from being inadvertently executed. At this time, the display unit 60 of the remote controller 50 displays the daytime warning mark, so that the boiling operation by the electric power of the photovoltaic power generation is executed in the daytime zone. The user can be surely recognized through the device 50.

The present invention is not limited to the above aspects, and can be applied without changing the gist thereof. For example, an electric heater type heating means may be used instead of the heat pump device 19. is there.

Further, each functional unit provided in the HEMS device 7 (weather information acquisition unit 32A, power generation power prediction unit 32B, load power consumption prediction unit 32C, device power consumption prediction unit 32D, surplus power prediction unit 32E). At least one of them may be provided in the server 9.

Further, in the above, the arrows shown in each figure of FIG. 2 and the like show an example of the signal flow, and do not limit the signal flow direction.

Further, the flowcharts shown in FIGS. 11 to 15 do not limit the present invention to the procedure shown in the above flow, and add / delete or change the order of the procedure within a range that does not deviate from the purpose and technical idea of the invention. You may do.

1 Hot water storage type hot water supply device 3 Solar power generation device 6 Electric load equipment 7 HEMS equipment 10 Hot water storage tank 19 Heat pump device (heat pump type heating means)
26 Heating going pipe (heating circulation circuit)
27 Heating return pipe (heating circulation circuit)
28 Heating circulation pump (heating circulation circuit)
31 Control device 32A Meteorological information acquisition unit (weather information acquisition means)
32B Power Generation Prediction Unit (Power Generation Prediction Means)
32C Load power consumption prediction unit 32D Device power consumption prediction unit (Device power consumption prediction means)
32E Surplus power prediction unit (surplus power prediction means)
33A Excess boiling determination unit 33B Display control unit (display control means)
49 Commercial power supply 50 Remote control device (remote control means)
60 Display unit (display means)
60A display screen 64 Hot water storage amount display unit 64A to E Display element 100 Solar power generation device cooperation hot water storage type hot water supply system M Noon boiling notice mark (noon boiling notice display)
T Boiling start time display

Claims (11)

With solar power generation equipment
A hot water storage tank for storing hot water, a hot water storage type hot water supply device provided with a heating means for heating the hot water, and the heating means performing a boiling operation for heating the hot water in the hot water storage tank.
In the hot water storage type hot water supply system linked with photovoltaic power generation equipment
A surplus power prediction means for determining a surplus power prediction value on the day following a desired date using the generated power prediction value of the photovoltaic power generation device, and
A display means for performing the desired display and
The surplus at a predetermined first timing from the desired day to the end time of the predetermined night zone over the next day until the night boiling start time for completing the boiling of the required amount of hot water on the next day. Daytime boiling determination, which determines whether or not the boiling operation of the hot water storage type hot water supply device using the electric power from the photovoltaic power generation device is possible in the daytime zone excluding the nighttime zone on the next day based on the electric power prediction value. Means and
When the daytime boiling determination means determines that the boiling operation in the daytime zone is possible, the daytime zone is at a predetermined second timing after the first timing and until the end time of the nighttime zone. A photovoltaic power generation device linked hot water storage type hot water supply system, characterized in that it has a display control means for controlling the display means so as to perform a daytime notice display corresponding to the execution of the boiling operation in the above. Further having a device power consumption prediction means for determining a device power consumption predicted value consumed by the hot water storage type hot water supply device on the next day.
The surplus power prediction means is
The surplus power prediction value on the next day is determined by using the power generation predicted value of the photovoltaic power generation device on the next day and the load power consumption predicted value consumed by the electric load excluding the hot water storage type hot water supply device. ,
The daytime boiling determination means is
The photovoltaic power generation according to claim 1, wherein it is determined whether or not the boiling operation is possible based on the surplus power prediction value and the device power consumption prediction value determined by the device power consumption prediction means. Equipment-linked hot water storage type hot water supply system. It also has a meteorological information acquisition means to acquire meteorological information,
The surplus power prediction means is
A claim characterized in that the surplus power prediction value on the next day is determined by using the generated power prediction value based on the weather information acquired by the weather information acquisition means and the load power consumption prediction value. Item 2. The photovoltaic power generation device linked hot water storage type hot water supply system. The display control means
Any one of claims 1 to 3, wherein the display means is controlled so that the daytime boiling notice display is extinguished when the boiling operation of the hot water storage type hot water supply device is completed in the daytime zone. The above-mentioned photovoltaic power generation device cooperation hot water storage type hot water supply system. The display control means
The claim is characterized in that when the daytime boiling determination means determines that the boiling operation in the daytime zone is impossible, the display means is controlled so as not to display the daytime boiling notice. The hot water storage type hot water supply system linked with a photovoltaic power generation device according to any one of 1 to 4. The display control means
When it is determined by the daytime boiling determination means that the boiling operation in the daytime zone is possible, in addition to the daytime boiling notice display, the boiling operation of the hot water storage type hot water supply device in the daytime zone is started. The solar power generation device-linked hot water storage type hot water supply system according to any one of claims 1 to 5, wherein the display means is controlled so as to further display the time. The display control means
When the daytime boiling determination means determines that the boiling operation in the daytime zone is possible, the boiling operation is started when the boiling operation of the hot water storage type hot water supply device in the daytime zone is started. The solar power generation device-linked hot water storage type hot water supply system according to claim 6, wherein the display means is controlled so as to eliminate the display of the time. The display control means
The solar power generation device-linked hot water storage type hot water supply system according to any one of claims 1 to 6, wherein the display means is controlled so as to display the amount of hot water in the hot water storage tank. The photovoltaic power generation device according to any one of claims 1 to 8, further comprising a remote control means capable of manually instructing the execution of a predetermined amount of the boiling operation in the hot water storage type hot water supply device. Cooperative hot water storage type hot water supply system. The solar power generation device linked hot water storage type hot water supply system according to claim 9, wherein the display means is provided in the remote control means. A hot water storage tank for storing hot water, a heating means for heating the hot water, and a display means for displaying a desired display are provided, and the heating means heats the hot water in the hot water storage tank in cooperation with a photovoltaic power generation device. In the hot water storage type hot water supply device linked with the photovoltaic power generation device that performs boiling operation
A daytime boiling determination means for determining whether or not the boiling operation of the hot water storage type hot water supply device using the electric power from the photovoltaic power generation device is possible in the daytime zone excluding the nighttime zone on the day following the desired day.
When the daytime boiling determination means determines that the boiling operation in the daytime zone is possible, the time when the determination is made is set as the first timing, and after the first timing and until the end time of the nighttime zone. The sun is characterized by having a display control means for controlling the display means so as to perform a daytime notice display corresponding to the execution of the boiling operation in the daytime zone at a predetermined second timing during the period. Photovoltaic device cooperation hot water storage type hot water supply device.

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