JP2017062058A - Hot water storage water heater system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hot water storage water heater system capable of suppressing a power consumption per unit period from exceeding an upper limit.SOLUTION: A hot water storage water heater system 1 comprises: a heat storage operation control unit 50a controlling a heat storage operation for increasing storage of heat of a hot water storage tank 4; a watt-hour meter 27 detecting an actual power consumption that is an actual power consumption of the hot water storage water heater system 1; an upper limit calculation unit 50c calculating a sub-period electric energy upper limit that is an upper limit of a power consumption for each of a plurality of sub periods into which a unit period is divided on the basis of information on an upper limit of a power consumption per unit period; and means notifying a user of occurrence of a power consumption excess state that is a state in which the actual power consumption since start of the current sub period exceeds the sub period electric energy upper limit when the power consumption excess state occurs.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hot water storage type hot water supply system.

  In the hot water storage type hot water supply system disclosed in Patent Document 1 below, the average power from the update to the present time is obtained at every predetermined time interval (5 minutes divided into 6), which is further divided into the demand time period (30 minutes). A predicted demand value is calculated based on the average power, a margin power value obtained by multiplying the forecast demand value by a margin ratio is compared with the target demand, and if the margin power value is larger than the target demand, a heat pump stop command is issued.

JP 2012-32117 A

  There are a wide variety of forms of contracts with power suppliers. One of them is high-voltage power reception. The contract power in the high voltage power reception is calculated as the largest value among the maximum demand power in each month in the past year including the current month. Here, the maximum demand power is the largest value in a month among all the power used in the facility, which is measured every demand period (for example, 30 minutes). When the power used for each demand period exceeds the contract power even once, the maximum value of the maximum demand power is updated, so the contract power increases and the basic charge increases. Since then, the basic charge will continue for a minimum of one year, resulting in higher electricity charges. The hot water storage hot water supply system of Patent Document 1 is intended to suppress the average power consumption for each demand period in the above power contract form.

  In the future, as electricity liberalization progresses, it is expected that various electric power supply companies will enter the market and the power contract forms will be more diverse. As one of them, an upper limit value of power consumption is set on a monthly basis, and when the upper limit value is exceeded, setting of a power contract form is expected such that the unit price of electricity charges becomes higher or power supply is stopped. In contrast to such an electric power contract form, in the hot water storage type hot water supply system as in Patent Document 1, the amount of electric power used on a monthly basis cannot be suppressed, the upper limit value of the electric power used is exceeded, and the unit price of electricity charges is high. There is a problem that power supply is stopped.

  The present invention has been made in order to solve the above-described problems, and an object of the present invention is to provide a hot water storage type hot water supply system capable of suppressing power consumption per unit period from exceeding an upper limit value.

  A hot water storage hot water supply system according to the present invention is a hot water storage hot water supply system comprising a heating means and a hot water storage tank for storing hot water heated by the heating means, and a heat storage operation control for controlling a heat storage operation for increasing a heat storage amount of the hot water storage tank. A plurality of unit periods based on information on power consumption detection means for detecting the actual power consumption, which is the actual power consumption of the hot water storage hot water supply system, and the upper limit value of the power consumption per unit period Upper limit value calculation means for calculating the upper limit value of the sub-period power consumption per divided sub-period, and the actual power consumption from the start of the current sub-period exceeds the sub-period power limit value And a means for notifying the user of the occurrence of the power consumption excess state when the power consumption excess state that is the state has occurred.

  According to the hot water storage type hot water supply system of the present invention, it is possible to suppress the amount of power consumption per unit period from exceeding the upper limit value.

1 is a configuration diagram illustrating a hot water storage type hot water supply system according to Embodiment 1. FIG. 3 is a flowchart illustrating a control operation of the hot water storage type hot water supply system according to the first embodiment. It is a figure for demonstrating the method to control heat storage operation so that the actual power consumption of a sub period may reach | attain a sub period power consumption target value. It is a front view of the remote control with which the hot water storage type hot-water supply system of Embodiment 2 is provided. 6 is a flowchart illustrating a control operation of the hot water storage type hot water supply system according to the second embodiment. It is a figure which shows the example of the hardware constitutions of the control apparatus with which the hot water storage type hot-water supply system of Embodiment 1 and Embodiment 2 is provided. It is a figure which shows the other example of the hardware constitutions of the control apparatus with which the hot water storage type hot-water supply system of Embodiment 1 and Embodiment 2 is provided.

  Hereinafter, embodiments will be described with reference to the drawings. Elements common to the drawings are denoted by the same reference numerals, and redundant description is simplified or omitted. Note that the number, arrangement, orientation, shape, and size of the devices, instruments, and components in the present invention are not limited to the number, arrangement, orientation, shape, and size shown in the drawings in principle. In addition, the present invention can include all combinations of configurations that can be combined among the configurations described in the following embodiments.

Embodiment 1 FIG.
FIG. 1 is a configuration diagram showing a hot water storage type hot water supply system 1 according to the first embodiment. As shown in FIG. 1, the hot water storage type hot water supply system 1 includes a heat pump unit 2 and a hot water storage unit 3 as heating means. The heat pump unit 2 includes a refrigeration cycle device (not shown) in which a compressor, a water refrigerant heat exchanger, an expansion valve (decompression device), and an air heat exchanger (evaporator) are sequentially connected by refrigerant piping. . A hot water storage tank 4 is provided in the hot water storage unit 3. The hot water storage tank 4 is connected to the heat pump unit 2 via a heating circulation circuit 24. The heating circulation circuit 24 connects the lower part of the hot water storage tank 4 and the water inlet of the water refrigerant heat exchanger of the heat pump unit 2, and connects the hot water outlet of the water refrigerant heat exchanger and the upper part of the hot water storage tank 4. An HP circulation pump 25 is provided in the middle of the heating circulation circuit 24.

  The hot water storage type hot water supply system 1 can perform a heat storage operation which is an operation for increasing the heat storage amount of the hot water storage tank 4. During the heat storage operation, the HP circulation pump 25 and the heat pump unit 2 are operated, so that the water taken out from the lower part of the hot water storage tank 4 is guided to the water refrigerant heat exchanger in the heat pump unit 2 and heated in the water refrigerant heat exchanger. Hot water is generated, and the hot water is returned to the upper part of the hot water storage tank 4. The heat storage operation is performed so that hot water to be used on the next day is stored in the hot water storage tank 4 mainly in the late-night power hours. Even in a time zone other than the midnight power time zone, if the remaining heat storage amount in the hot water storage tank 4 is reduced, a heat storage operation may be performed in order to prevent hot water from running out.

  The hot water storage tank 4 is provided with first to fourth temperature sensors 5a to 5d from the upper part of the hot water storage tank 4 at predetermined volume positions of the hot water storage tank 4, for example, positions of 0L, 50L, 100L, and 150L. It has been. A fifth temperature sensor 5 e is provided on the side of the heating circuit 24 that is connected to the lower part of the hot water storage tank 4. These first to fifth temperature sensors 5 a to 5 e function as a heat storage amount detection means for detecting the heat storage amount in the hot water storage tank 4. The hot water storage tank temperature sensor 6 is provided in the upper part of the hot water storage tank 4 and detects the temperature of hot water heated by the heat pump unit 2 and returned to the upper part of the hot water storage tank 4 (hereinafter referred to as “heat pump heating temperature”).

  The general hot water supply side electric mixing valve 7 is set by mixing hot water from a hot water supply pipe 8 connected to the upper part of the hot water storage tank 4 and water from a water supply pipe 9 connected to a water source such as a water pipe. Generate hot water of temperature. The hot water is supplied to a hot water tap (not shown) such as a faucet through the mixed hot water supply pipe 10.

  The water supply pipe 9 is provided with a water supply temperature sensor 23 for detecting the temperature of water flowing through the water supply pipe 9. The mixed hot water supply pipe 10 is provided with a hot water supply flow rate sensor 19 and a hot water supply temperature sensor 20 to detect the flow rate and temperature of hot water flowing through the mixed hot water supply pipe 10.

  The hot water supply side electric mixing valve 11 generates hot water having a set temperature by mixing hot water from the hot water supply pipe 8 and water from the water supply pipe 9. The hot water is supplied to a bathtub (not shown) via the mixed bath pipe 18 and the bath-side circulation circuit 12. The hot water storage type hot water supply system 1 can perform a hot water filling operation for filling the bathtub. In the hot water filling operation, the start and stop of hot water supply are controlled by an electromagnetic valve 13 provided in the mixed bath pipe 18. The mixed bath pipe 18 is provided with a bath flow sensor 21 and a bath temperature sensor 22 to detect the flow rate and temperature of hot water flowing through the mixed bath pipe 18.

  The bath-side circulation circuit 12 is a path that draws bath water from the bathtub by the bath circulation pump 14 and returns to the bathtub via the heat exchanger 15. The tank-side circulation circuit 16 is a path that draws hot water in the hot water storage tank 4 from the upper part of the hot water storage tank 4 by the tank circulation pump 17 and connects to the lower part of the hot water storage tank 4 via the heat exchanger 15. The hot water storage hot water supply system 1 can perform a reheating operation for heating the bathtub water stored in the bathtub. During the reheating operation, the bath circulation pump 14 and the tank circulation pump 17 are driven, and the bath water drawn into the bath-side circulation circuit 12 from the bathtub by the bath circulation pump 14 is tanked from the upper part of the hot water storage tank 4 by the tank circulation pump 17. Heat is exchanged with the hot water drawn into the side circulation circuit 16 via the heat exchanger 15 and returns to the bathtub. The operation of the bath circulation pump 14 and the tank circulation pump 17 may be stopped when the bath water reaches a set temperature, and the chasing operation may be automatically terminated.

  The hot water storage type hot water supply system 1 includes a remote controller 26, a watt hour meter 27, and a control device 50. The control device 50 includes a heat pump unit 2, an HP circulation pump 25, first to fifth temperature sensors 5a to 5e, a hot water tank temperature sensor 6, a general hot water supply side electric mixing valve 7, a bath hot water supply side electric mixing valve 11, and an electromagnetic valve. 13, bath circulation pump 14, tank circulation pump 17, hot water flow sensor 19, hot water temperature sensor 20, bath flow sensor 21, bath temperature sensor 22, water temperature sensor 23, and watt hour meter 27, respectively It is connected to the. The control device 50 is connected to the remote control 26 so as to be capable of data communication in both directions. Communication between the control device 50 and the remote control 26 may be wired communication or wireless communication. The control device 50 controls the operation of the hot water storage type hot water supply system 1 as a whole.

  The remote control 26 has a function as a user interface device. The remote control 26 is installed, for example, in a bathroom or kitchen. The remote controller 26 may include an operation unit such as a switch operated by a user, a display device capable of displaying information, a voice announcement device, and the like. By operating the operation unit of the remote controller 26, the user can set the hot water supply temperature, instruct the heat storage operation, the hot water filling operation, the chasing operation, etc., and make a reservation. Information such as a hot water supply set temperature can be displayed on the display device of the remote controller 26.

  The watt-hour meter 27 is an example of a power consumption amount detecting means for detecting the amount of power actually consumed by the hot water storage type hot water supply system 1. In the case of AC power, the watt hour meter 27 may integrate and measure active power out of AC power. The watt-hour meter 27 may detect the amount of power consumed by the entire hot water storage hot water supply system 1. The watt-hour meter 27 may detect the power consumption of the main part of the hot water storage hot water supply system 1 that consumes a large amount of power. In the present embodiment, the power consumption of the compressor of the heat pump unit 2 accounts for most of the power consumption of the hot water storage hot water supply system 1 as a whole. For this reason, the watt-hour meter 27 may detect only the power consumption amount of the heat pump unit 2. It goes without saying that the watt-hour meter 27 may detect the total value of the power consumption of the heat pump unit 2 and the power consumption of the hot water storage unit 3. In the following description, the power consumption detected by the wattmeter 27 is referred to as “actual power consumption”.

  The control device 50 in the present embodiment includes a heat storage operation control unit 50a, a bath control unit 50b, an upper limit calculation unit 50c, a time measuring unit 50d, a receiving unit 50e, and a setting unit 50f. The heat storage operation control unit 50a controls the heat storage operation. The bath control unit 50b controls the hot water filling operation and the chasing operation. The upper limit value calculation unit 50c calculates a sub period power amount upper limit value to be described later. The time measuring unit 50d measures the date (may include the day of the week) and the time. The receiving unit 50e and the setting unit 50f will be described later.

  The control device 50 may be further communicably connected to another device. For example, as in the present embodiment, the control device 50 may be connected to a HEMS (Home Energy Management System) controller 60 so as to be capable of data communication in both directions. In addition to the control device 50, the HEMS controller 60 is connected to each device (not shown) used in the home so as to allow data communication. Communication between the HEMS controller 60 and each device including the control device 50 may be wired communication or wireless communication. Further, the HEMS controller 60 may be connected to a server computer 110 such as a power supply company that supplies power used by the hot water storage hot water supply system 1 via a network 100 such as the Internet so that data communication is possible.

  The heat storage operation control unit 50a performs the heat storage operation mainly in the late-night power hours, and also in other daytime hours, when the heat storage amount of the hot water storage tank 4 becomes less than the startup heat amount, Start heat storage operation to prevent. The startup heat amount corresponds to the heat storage amount of the hot water storage tank 4 that triggers the start of the heat storage operation. For example, the amount of heat corresponding to 300 L in terms of 42 ° C. hot water may be set as the starting heat amount. By starting the heat storage operation, the amount of heat stored in the hot water storage tank 4 gradually increases. Thereafter, the heat storage operation control unit 50a ends the heat storage operation when the heat storage amount of the hot water storage tank 4 exceeds the end heat amount. The end heat amount is a heat storage amount serving as an end condition for ending the heat storage operation in the daytime time zone. The end heat amount is set to a value obtained by adding a predetermined heat amount (for example, a heat amount corresponding to 50 L in terms of 42 ° C. hot water) to the starting heat amount.

  The heat pump unit 2 may have a variable heating capacity [kW] for heating water. The heating capacity is the amount of heat given to water by the heat pump unit 2 per unit time. The control device 50 can control the heating capacity of the heat pump unit 2 by adjusting the capacity of the compressor of the heat pump unit 2, for example. For example, the capacity of the compressor can be controlled by changing the rotational speed of the compressor of the heat pump unit 2. The rotational speed of the compressor can be made variable by, for example, inverter control. The heating capacity and power consumption of the heat pump unit 2 are in a substantially proportional relationship. For this reason, if the heating capability of the heat pump unit 2 is lowered, the power consumption is also lowered accordingly.

  FIG. 2 is a flowchart showing a control operation of hot water storage type hot water supply system 1 according to the first embodiment. In step S30 of FIG. 2, the control device 50 acquires information on the upper limit value of the power consumption amount of the hot water storage hot water supply system 1 per unit period as follows, for example. The unit period can be, for example, one month. The unit period is not limited to this, for example, 1 week, 10 days, 2 weeks, 3 weeks, 4 weeks, 30 days, 2 months, 3 months, 6 months, 1 year, etc. You can also

  The user may input information on the upper limit value of the power consumption per unit period by operating the remote controller 26. In that case, the control device 50 can acquire information on the upper limit value of the power consumption per unit period from the remote control 26.

  The control device 50 may include a receiving unit 50e that receives information transmitted from the HEMS controller 60 or the like. The HEMS controller 60 may calculate or set an upper limit value of power consumption per unit period. The HEMS controller 60 may receive information on the upper limit value of power consumption per unit period from the server computer 110 such as a power supplier. The HEMS controller 60 receives information related to a power consumption suppression command or a power supply / demand forecast from the server computer 110 such as a power supplier, and based on the received information, sets an upper limit value of power consumption per unit period. It may be calculated or set. In these cases, the receiving unit 50e of the control device 50 can acquire information on the upper limit value of the power consumption per unit period from the HEMS controller 60. The receiving unit 50e of the control device 50 may directly receive information such as the upper limit value of the power consumption per unit period from the server computer 110 such as a power supply company. . Further, the control device 50 may calculate or set an upper limit value of the power consumption amount per unit period based on information received from the server computer 110 such as a power supply company.

  The process proceeds from step S30 to step S31. In step S31, the upper limit value calculation unit 50c calculates the sub period power amount upper limit value based on the information acquired in step S30. The sub period power amount upper limit value is an upper limit value of the power consumption amount per sub period obtained by dividing the unit period into a plurality of units. The sub period can be, for example, one day. The sub period is not limited to this, and may be, for example, 6 hours, 12 hours, 2 days, 3 days, 1 week, or the like.

  The upper limit value calculation unit 50c may calculate the sub period power amount upper limit value by equally distributing the power consumption upper limit value per unit period to the plurality of sub periods. In this case, the upper limit calculator 50c may calculate the sub period power amount upper limit as follows, for example. As an example, the unit period is one month (31 days), the sub period is one day, and the power consumption upper limit per unit period is 310 kWh. That is, the upper limit value of power consumption per month (31 days) is 310 kWh. In this case, the upper limit calculator 50c distributes 310 kWh evenly over 31 days, thereby calculating the power consumption upper limit (sub period power upper limit) per day as 10 kWh.

  The upper limit value calculation unit 50c may calculate the sub period power amount upper limit value in such a manner that the power consumption upper limit value per unit period is unevenly distributed to the plurality of sub periods. In this case, the upper limit calculator 50c may calculate the sub period power amount upper limit as follows, for example. As an example, the sub-period is set to one day, and schedule information regarding the schedule (monthly schedule, weekly schedule, daily schedule, etc.) of a plurality of users (family members, family members, etc.) living in the house is input to the HEMS controller 60. Suppose that it is possible. The receiving unit 50e of the control device 50 can acquire the schedule information from the HEMS controller 60. On days when some or all of the users are scheduled to be absent due to travel, etc. (hereinafter referred to as “planned absence days”), the amount of hot water used is less than on other days. Can be expected. In this case, the upper limit value calculation unit 50c compares the power consumption amount upper limit value per sub period (per day) with respect to the scheduled absence date to the power consumption upper limit value per sub period (per day) for other days. Therefore, the power consumption amount upper limit value per unit period may be unevenly distributed over a plurality of sub-periods. In addition, with respect to the day when all of a plurality of users are scheduled to be absent, the control device 50 may perform control so as not to perform the heat storage operation in the late-night power hours. In addition, the user may input the schedule information to the remote control 26, and the control device 50 may acquire the schedule information from the remote control 26.

  The process proceeds from step S31 to step S32. In step S32, the control device 50 determines whether or not the actual power consumption from the start of the current sub-period to the current time has exceeded the sub-period power consumption upper limit calculated by the upper limit calculator 50c. In the following description, a state where the actual power consumption from the start of the current sub-period to the current time exceeds the sub-period power consumption upper limit value is referred to as “power consumption excess state”.

  In step S32, when the actual power consumption from the start of the current sub-period to the current time is equal to or lower than the sub-period power consumption upper limit value, that is, when the power consumption excess state has not occurred, the control device 50 Perform normal control. In this case, the process proceeds from step S32 to step S33. In step S33, the heat storage operation control unit 50a determines whether or not the current heat storage amount of the hot water storage tank 4 is lower than the first startup heat amount. When the heat storage amount of the current hot water storage tank 4 is equal to or greater than the first startup heat amount, the process proceeds from step S33 to step S35. When the current heat storage amount of the hot water storage tank 4 is lower than the first startup heat amount, the process proceeds from step S33 to step S34. In step S34, the heat storage operation control unit 50a starts a heat storage operation for preventing hot water shortage. The process proceeds from step S34 to step S35. In step S35, the heat storage operation control unit 50a determines whether or not the current heat storage amount of the hot water storage tank 4 exceeds the end heat amount. This end heat quantity is a heat quantity obtained by adding a predetermined heat quantity to the first startup heat quantity. When the heat storage amount of the current hot water storage tank 4 does not exceed the end heat amount, the process proceeds from step S35 to step S42. When the heat storage amount of the current hot water storage tank 4 exceeds the end heat amount, the process proceeds from step S35 to step S36. In step S36, the heat storage operation control unit 50a stops (ends) the heat storage operation. Thereafter, the process proceeds to step S42.

  On the other hand, if the actual power consumption from the start of the current sub-period to the current time exceeds the sub-period power consumption upper limit value in step S32, that is, if a power consumption excess state has occurred, the process proceeds to step S37. Transition. In step S37, the control device 50 notifies the user of the occurrence of the power consumption excess state. The means for notifying the user of some information by the hot water storage hot water supply system 1 including this step S37 may be any means. For example, in step S37, information indicating that the power consumption excess state has occurred may be displayed on the display device of the remote controller 26. In the case where the remote control 26 includes a voice announcement device, it may be notified by voice announcement that an excess power consumption state has occurred. Further, the control device 50 transmits information related to the occurrence of the power consumption excess state to the HEMS controller 60, and the HEMS controller 60 displays information indicating that the power consumption excess state has occurred on the operation display terminal (not shown) of the HEMS. You may let them.

  According to the present embodiment, when the power consumption excess state occurs, the following effects can be obtained by notifying the user of the fact. The user can recognize that hot water has been used excessively in the current sub period (today if the sub period is one day) by knowing the occurrence of the power consumption excess state. Based on this recognition, the user can pay attention not to overuse hot water. Therefore, it is possible to suppress the power consumption in the period until the end of the current unit period (for example, one month) (for example, the period until the end of this month). As a result, when the current unit period elapses, it is possible to reliably suppress the actual power consumption amount per unit period from exceeding the power consumption amount upper limit value per unit period.

  In the present embodiment, the upper limit value of the amount of power used is set per unit period (for example, monthly) as the power contract form with the power supply company. When the contract form is set such that the power supply is stopped or the power supply is stopped, it is possible to reliably suppress the amount of power used per unit period from exceeding the upper limit value. For this reason, in said contract form, it can suppress reliably that an electricity bill unit price becomes expensive, or electric power supply is stopped. For example, according to the present embodiment, it is possible to reliably suppress the bias of power usage in the first half of the unit period (for example, the first half of the month), so that the amount of power used per unit period can be reduced before the unit period elapses. Exceeding the upper limit can be reliably suppressed.

  The process proceeds from step S37 to step S38. In step S38, the heat storage operation control unit 50a determines whether or not the current heat storage amount of the hot water storage tank 4 is lower than the second startup heat amount. The second startup heat quantity is a value lower than the first startup heat quantity. When the heat storage amount of the current hot water storage tank 4 is equal to or greater than the second startup heat amount, the process proceeds from step S38 to step S40. When the current heat storage amount of the hot water storage tank 4 is less than the second startup heat amount, the process proceeds from step S38 to step S39. In step S39, the heat storage operation control unit 50a starts the heat storage operation for preventing hot water shortage. The process proceeds from step S39 to step S40. In step S40, the heat storage operation control unit 50a determines whether or not the current heat storage amount of the hot water storage tank 4 exceeds the end heat amount. This end heat quantity is a heat quantity obtained by adding a predetermined heat quantity to the second startup heat quantity. When the heat storage amount of the current hot water storage tank 4 does not exceed the end heat amount, the process proceeds from step S40 to step S42. When the current heat storage amount of the hot water storage tank 4 exceeds the end heat amount, the process proceeds from step S40 to step S41. In step S41, the heat storage operation control unit 50a stops (ends) the heat storage operation. Thereafter, the process proceeds to step S42.

  In the present embodiment, as described above, the second startup heat amount that is the startup heat amount when the power consumption excess state occurs is the first startup heat amount when the power consumption excess state does not occur. It is lower than the starting heat quantity. For this reason, when the power consumption excess state occurs, the frequency of the heat storage operation for preventing hot water shortage is suppressed as compared with the case where the power consumption excess state does not occur. As a result, when the power consumption excess state occurs, the power consumption of the heat storage operation can be reliably suppressed. Therefore, according to the present embodiment, when the power consumption excess state occurs in the current sub-period, it is possible to reliably suppress the power consumption exceeding that amount. Therefore, it can suppress more reliably that the actual power consumption per unit period exceeds the power consumption upper limit per unit period.

  The heat storage operation control unit 50a may be configured as follows instead of lowering the startup heat amount when the power consumption excess state occurs compared to when the power consumption excess state does not occur. When the power consumption excess state occurs, the heat storage operation control unit 50a lowers the heating capacity or heat pump heating temperature of the heat pump unit 2 during the heat storage operation compared to when the power consumption excess state does not occur. You may do it. By doing so, since the power consumption amount of the heat storage operation when the power consumption excess state occurs can be surely suppressed, an effect similar to the above can be obtained. Further, the heat storage operation control unit 50a may prohibit the heat storage operation when the power consumption excess state occurs. When the power consumption excess state occurs, the power consumption can be more reliably suppressed by prohibiting the heat storage operation.

  The above-described control for suppressing the power consumption amount of the heat storage operation is an example of the power consumption suppression control for suppressing the power consumption of the hot water storage hot water supply system 1. When the power consumption excess state occurs, it is possible to more reliably suppress the actual power consumption per unit period from exceeding the power consumption upper limit per unit period by performing the power consumption suppression control. The power consumption suppression control is not limited to the control that suppresses the power consumption amount of the heat storage operation. As another example of the power consumption suppression control, for example, the bath control unit 50b prohibits or restricts the execution of one or both of the hot water filling operation and the chasing operation when an excessive power consumption state occurs. Also good. In this case, the bath control unit 50b may reject the instruction of the hot water filling operation or the chasing operation input by the user to the operation unit of the remote control 26. Alternatively, the bath control unit 50b may reduce the amount of hot water supplied to the bathtub during the hot water filling operation as compared to the normal time, or may reduce the heating amount during the chasing operation as compared with the normal time. By prohibiting or restricting the implementation of one or both of the hot water filling operation and the chasing operation, it is possible to suppress a decrease in the amount of heat stored in the hot water storage tank 4, and thus it is possible to suppress the start of the heat storage operation. Therefore, it can suppress more reliably that the actual power consumption per unit period exceeds the power consumption upper limit per unit period.

  When the power consumption suppression control is performed due to the occurrence of the power consumption excess state, the user may be notified of this. For example, when at least one of a heat storage operation, a hot water filling operation, and a chasing operation is restricted or prohibited, this may be notified to the user together in step S37.

  In step S42, the timer unit 50d determines whether or not the current sub-period has elapsed. If the current sub-period has not elapsed, the process returns to step S32. If the current sub period has elapsed, the process proceeds to step S43. In step S43, it is determined whether the actual power consumption of the sub-period that has passed this time has exceeded the sub-period power amount upper limit value. If the actual power consumption of the sub-period that has passed this time is below the sub-period power consumption upper limit value, that is, if the power consumption excess state has not occurred in the sub-period that has passed this time, step S43 to step S44. Migrate to

  In step S44, the upper limit value calculation unit 50c performs sub-period power for an unelapsed sub-period (hereinafter, referred to as “non-elapsed sub-period”) among unit periods to which the sub-period elapsed this time belongs as follows. Correction is made to increase the upper limit value. The upper limit value calculation unit 50c adds the power amount corresponding to the actual power consumption amount of the sub-period that has elapsed this time below the sub-period power amount upper limit value to the sub-period power amount upper limit value for the non-elapsed sub-period. In addition, the sub period power amount upper limit value for the non-elapsed sub period is corrected. When there are a plurality of non-elapsed sub-periods, the upper limit value calculation unit 50c calculates a power amount corresponding to the amount obtained by subtracting the actual power consumption amount of the sub-period that has elapsed this time from the sub-period power amount upper limit value. The sub-period power amount upper limit value for the elapsed sub-periods may be added to the sub-period power amount upper limit value evenly or unevenly, or may be added to the sub-period power amount upper limit value for only a part of the plurality of non-elapsed sub-periods good. As an example, the unit period is 1 month (31 days), the sub period is 1 day, the power consumption upper limit value per unit period is 310 kWh, the sub period power amount upper limit value before correction is 10 kWh, and the unit period It is assumed that the first day of the first sub-period has elapsed this time, and the actual power consumption on the first day is 7 kWh. In this case, the upper limit value calculation unit 50c calculates the surplus power amount (3 kWh) corresponding to the amount obtained by subtracting the actual power consumption amount (7 kWh) on the first day that has passed this time from the sub period power amount upper limit value (10 kWh). The sub-period power amount upper limit value for the non-elapsed sub-period may be corrected so that the sub-period power amount upper limit value for the non-elapsed sub-period (30 days) is equally distributed and added. In this case, the sub-period power amount upper limit value for 30 days, which is the non-elapsed sub-period, is corrected to be 10.1 kWh obtained by adding 0.1 kWh, which is a value obtained by dividing the surplus power amount (3 kWh) into 30 equal parts. The Alternatively, the upper limit value calculation unit 50c adds a surplus power amount (3 kWh) to only the sub period power amount upper limit value for a part of the non-elapsed sub period (30 days). The period power upper limit value may be corrected. For example, the upper limit value calculation unit 50c may add the surplus power amount (3 kWh) only to the sub-period power amount upper limit value for the next day and correct the sub-period power amount upper limit value for the next day to be 13 kWh.

  In the present embodiment, when the actual power consumption of the sub-period that has elapsed this time is less than the sub-period power amount upper limit value, by performing the process of step S44 described above, the sub-period for the non-elapsed sub-period It can correct | amend so that an electric energy upper limit may be increased. Thereby, it can avoid suppressing power consumption more than necessary in the non-elapsed sub-period. For this reason, it can suppress reliably that the actual power consumption per unit period exceeds a power consumption upper limit, without restrict | limiting use of a user's hot water more than necessary. After step S44, the process returns to step S32.

  On the other hand, in step S43, if the actual power consumption of the sub-period that has passed this time exceeds the sub-period power consumption upper limit value, that is, if a power consumption excess state has occurred in the sub-period that has passed this time, The process proceeds from step S43 to step S45.

  In step S45, the upper limit value calculation unit 50c corrects the sub period power amount upper limit value for the non-elapsed sub period to be decreased as follows. The upper limit calculator 50c reduces the power amount corresponding to the excess of the sub-period power amount upper limit value of the actual power consumption of the sub-period that has elapsed this time from the sub-period power amount upper limit value for the non-elapsed sub-period. The sub period power amount upper limit value for the non-elapsed sub period is corrected. As an example, the unit period is 1 month (31 days), the sub period is 1 day, the power consumption upper limit value per unit period is 310 kWh, the sub period power amount upper limit value before correction is 10 kWh, and the unit period It is assumed that the first day of the first sub-period has elapsed this time, and the actual power consumption on the first day is 13 kWh. In this case, the upper limit calculation unit 50c calculates the excess power amount (3 kWh) corresponding to the excess of the sub-period power amount upper limit value (10 kWh) of the actual power consumption (13 kWh) on the first day that has passed this time. The sub-period power amount upper limit value for the non-elapsed sub-period may be corrected so as to be evenly reduced from the sub-period power amount upper limit value for the elapsed sub-period (30 days). In this case, the sub-period power amount upper limit value for 30 days, which is the non-elapsed sub-period, is corrected to be 9.9 kWh obtained by subtracting 0.1 kWh, which is a value obtained by dividing the excess power amount (3 kWh) into 30 equal parts. . After step S45, the process returns to step S32.

  In the present embodiment, when the power consumption excess state occurs in the sub-period that has elapsed this time, the above-described step S45 is performed to reduce the sub-period power amount upper limit value for the non-elapsed sub-period. Can be corrected. Therefore, it is possible to reliably suppress the actual power consumption per unit period from exceeding the power consumption upper limit value by more reliably suppressing the power consumption in the non-elapsed sub-period.

  As described above, the control operation of the hot water storage type hot water supply system 1 according to the present embodiment has been described with reference to FIG.

  (Modification 1) When the state where the actual power consumption from the start of the current sub-period is equal to or higher than a threshold value lower than the sub-period power upper limit value occurs, the heat storage operation control unit 50a before the occurrence of the state Compared to the above, the control for suppressing the power consumption amount of the heat storage operation may be performed, and the heat storage operation may be prohibited when an excessive power consumption state occurs thereafter. Here, the “threshold value lower than the sub period power amount upper limit value” can be determined as 0.8 times or 0.9 times the sub period power amount upper limit value, for example. The “control for suppressing the power consumption amount of the heat storage operation” includes, for example, control for lowering at least one of the startup heat amount, the heating capacity of the heat pump unit 2 and the heat pump heating temperature in the heat storage operation. According to the first modification, the power consumption can be suppressed in stages prior to the prohibition of the heat storage operation, so that the prohibition of the heat storage operation can be suppressed. Thereby, the rapid change of usability, such as a user becoming unable to use hot water unexpectedly by prohibition of a heat storage operation, can be suppressed reliably.

  (Modification 2) The hot water storage type hot water supply system 1 may be configured so that the user can set in advance whether or not to execute the power consumption suppression control when an excessive power consumption state occurs. As such a configuration, for example, the user may perform the setting by operating the remote control 26, or the user may perform the setting by operating a HEMS operation display terminal (not shown). The HEMS controller 60 may transmit the setting information to the control device 50. The setting unit 50f of the control device 50 receives the information set by the user as described above. As power consumption suppression control, for example, when at least one of a heat storage operation, a hot water filling operation, and a reheating operation is restricted or prohibited, each of the heat storage operation, the hot water filling operation, and the reheating operation is restricted or prohibited. The user may be able to individually set whether to prohibit or not. According to the second modification, it is possible for the user to arbitrarily select whether to give priority to the suppression of the electricity charge or the use of hot water, and the usability becomes worse against the user's intention. This can be prevented more reliably and the usability can be improved.

  (Modification 3) The hot water storage type hot water supply system 1 is in a case where the actual power consumption per unit period detected by the watt hour meter 27 exceeds the upper limit value of the power consumption per unit period. Either or both of notifying the user of the occurrence of the state and performing power consumption suppression control may be performed. In this case, as the power consumption suppression control, for example, control for restricting or prohibiting at least one of the heat storage operation, the hot water filling operation, and the chasing operation can be performed. According to the third modification, since the power consumption per sub period can be suppressed, the actual power consumption per unit period exceeds the upper limit value of the power consumption per unit period in the next unit period. Can be reliably suppressed.

  (Modification 4) The heat storage operation control unit 50a may control the heat storage operation of the sub period so that the actual power consumption of the sub period reaches at least the sub period power amount target value. The sub period power amount target value is a value lower than the sub period power amount upper limit value. The sub period power amount target value may be a value calculated from the target value of power consumption per unit period. The target value of the power consumption per unit period is a value lower than the upper limit value of the power consumption per unit period. The sub period power amount target value may be a value calculated by distributing the target value of power consumption per unit period to a plurality of sub periods. The user may input information on the target value of the power consumption per unit period by operating the remote controller 26. The HEMS controller 60 may receive information on the target value of the power consumption per unit period from the server computer 110 such as a power supplier. The receiving unit 50e of the control device 50 may directly receive information on the target value of the power consumption per unit period from the server computer 110 such as a power supplier.

The heat storage operation control unit 50a can control the heat storage operation of the sub period so that the actual power consumption of the sub period reaches at least the sub period power amount target value by the following method, for example. FIG. 3 is a diagram for explaining a method of controlling the heat storage operation so that the actual power consumption in the sub period reaches the sub period power target value. Here, as an example, it is assumed that the sub-period is one day from 0:00 to 0:00 of the next day. In this case, the end time of the sub-period is 0:00. The heat storage operation control unit 50a performs the sub-period (one day so that the actual power consumption in the sub-period at the time when the current sub-period ends does not fall below the sub-period power amount target value as follows. The heat storage operation can be started at a time before the end time (0 o'clock). First, the heat storage operation control unit 50a calculates a necessary heat storage operation time Hr, which is a heat storage operation time necessary for causing the actual power consumption of the current sub period to reach the sub period power amount target value. If the sub-period power consumption target value is E1 [kWh], the current actual power consumption is E2 [kWh], and the heat storage operation power consumption is P1 [kW], the required heat storage operation time Hr is calculated by the following equation: it can.
Hr = (E1-E2) / P1 (1)

Next, the heat storage operation control unit 50a calculates the required start time Tm, which is the time at which the heat storage operation should be started, using the necessary heat storage operation time Hr calculated by the above equation (1) by the following equation.
Tm = Sub period (one day) end time (0 o'clock) −Hr (2)
The heat storage operation control unit 50a calculates the request start time Tm from time to time by periodically repeating the calculations of the above equations (1) and (2). Then, the heat storage operation control unit 50a starts the heat storage operation when the current time has passed the request start time Tm.

  Hereinafter, an example in the case where the heat storage operation control unit 50a performs the above-described control will be described with reference to FIG. FIG. 3 shows an example of a daily change in actual power consumption. In the example of FIG. 3, the actual power consumption E2 is maintained at zero because no power is consumed from the start time (0 o'clock) to the time t1 (around 11 o'clock) of the sub-period (one day), and the time t1 to the time t2 The actual power consumption E2 increases up to E2 ′ as power is consumed (around 13:00), and the actual power consumption E2 is maintained at E2 ′ because power is not consumed after time t2. ing. The slope of the broken straight line α in FIG. 3 corresponds to the power consumption P1 of the heat storage operation. Until the time t1, the current actual power consumption E2 is zero and Hr = 8 hours. For this reason, the request start time Tm is calculated as 16:00, which is retroactive to Hr = 8 hours from the end time (0 o'clock) of the sub-period (one day). In this case, since the current time is before the request start time Tm (16:00), the heat storage operation control unit 50a does not start the heat storage operation. On the other hand, after the time t2, the actual power consumption E2 = E2 'at the present time, and Hr = 6 hours. For this reason, the request start time Tm is calculated as 18 o'clock retroactive to Hr = 6 hours from the end time (0 o'clock) of the sub-period (one day). In this case, the heat storage operation control unit 50a starts the heat storage operation when the current time passes the request start time Tm (18:00). As a result, the actual power consumption increases as power is consumed in the heat storage operation from 18:00, and when the sub-period (1 day) ends (0:00), the actual power consumption Can reach the sub-period power amount target value. In this case, the heat storage operation control unit 50a may stop the heat storage operation when the actual power consumption reaches the sub period power amount target value. Alternatively, the heat storage operation control unit 50a may continue the heat storage operation until the heat storage amount of the hot water storage tank 4 reaches the target value even after the actual power consumption reaches the sub period power amount target value.

  According to Modification 4 described above, the following effects can be obtained. It can be reliably suppressed that the actual power consumption per unit period is lower than the target value of the power consumption per unit period. Therefore, there is an advantage that the power supplier can reliably sell a certain amount of power. Because of this advantage, it is assumed that the power supplier will set the electricity price in the power contract form that defines the target value of power consumption per unit period to be lower than the electricity charge in other power contract forms. it can. In this case, there is an advantage that the electricity charge is cheaper for the user. Moreover, there is an advantage that the amount of hot water that can be used increases for the user by performing the heat storage operation so that the actual power consumption in the sub-period reaches the target power value in the sub-period.

Embodiment 2. FIG.
Next, the second embodiment will be described with reference to FIG. 4 and FIG. 5. The description will focus on the differences from the first embodiment, and the description of the same or corresponding parts will be simplified or simplified. Omitted. The hot water storage hot water supply system 1 according to the second embodiment has the configuration shown in FIG. The hot water storage hot water supply system 1 according to the second embodiment may perform the control operation shown in FIG. The hot water storage hot water supply system 1 according to the second embodiment further includes a configuration described below, and further performs a control operation described below.

  In the hot water storage hot water supply system 1 according to the second embodiment, the receiving unit 50e of the control device 50 can receive a power consumption suppression command that is a command for requesting suppression of power consumption. The HEMS controller 60 may receive a power consumption suppression command from the server computer 110 such as a power supplier, and the HEMS controller 60 may transmit the received power consumption suppression command to the control device 50. Alternatively, the receiving unit 50e of the control device 50 may directly receive a power consumption suppression command from the server computer 110 such as a power supplier.

  FIG. 4 is a front view of remote controller 26 provided in hot water storage type hot water supply system 1 of the second embodiment. As shown in FIG. 4, the remote controller 26 includes a selection switch 26a, a determination switch 26b, and a display device 26c. The selection switch 26a is an operation unit for a user to perform a selection operation. The determination switch 26b is an operation unit for the user to perform a determination operation. The display device 26c can display information such as setting contents and device status. In the second embodiment, the user can individually set whether to accept or prohibit the reception of the power consumption suppression command by operating the remote control 26 for each time period. When the user operates the selection switch 26a, the time zone to be set is selected in turn each time it is operated. In the second embodiment, the time zone is divided into, for example, three time zones of 0:00 to 8:00, 8:00 to 16:00, and 16:00 to 24:00. When the user operates the determination switch 26b, it becomes possible to select whether to accept or prohibit acceptance for the selected time zone. When the selection switch 26a is operated in this state, reception permission and reception prohibition are selected in order each time the selection switch 26a is operated. When the decision switch 26b is operated, either the selected acceptance permission or acceptance prohibition state is set for the time period. As described above, the user can set, for each time period, whether to accept the power consumption suppression command or to prohibit the acceptance of the power consumption suppression command. The remote control 26 transmits information set by the user in this way to the control device 50. The setting unit 50f receives information set by the user in this way. Instead of the configuration described above, the user may perform the same settings as described above by operating a HEMS operation display terminal (not shown), and the HEMS controller 60 may transmit the setting information to the control device 50.

  In the hot water storage hot water supply system 1 according to the second embodiment, the setting state of the setting unit 50f is displayed on the display device 26c of the remote controller 26, so that the user can be notified of the setting state. In the example shown in FIG. 4, reception is permitted for the time zone from 0:00 to 8:00, reception is permitted for the time zone from 8:00 to 16:00, and reception is prohibited for the time zone from 16:00 to 24:00. The display device 26c displays the setting state in the case of being notified to the user.

  FIG. 5 is a flowchart showing a control operation of hot water storage type hot water supply system 1 according to the second embodiment. In step S50 of FIG. 2, the receiving unit 50e determines whether or not a power consumption suppression command has been received. When the power consumption suppression command is received, the process proceeds from step S50 to step S51. In step S51, the setting unit 50f checks the setting state for the current time zone. That is, the setting unit 50f confirms whether the current time zone is set to accept permission for permitting acceptance of the power consumption suppression command or to accept prohibition for prohibiting acceptance of the power consumption suppression command.

  When the current time zone is set to accept permission for accepting acceptance of the power consumption suppression command, the process proceeds from step S51 to step S52. In step S52, the heat storage operation control unit 50a prohibits the heat storage operation. In step S52, the heat storage operation control unit 50a stops the heat storage operation when the heat storage operation is being executed. In this way, when the acceptance permission for permitting acceptance of the power consumption suppression command is set, the heat storage operation is prohibited when the power consumption suppression command is received, thereby responding to the request for the power consumption suppression command. It becomes possible.

  On the other hand, when the current time zone is set to reception prohibition that prohibits reception of the power consumption suppression command, the heat storage operation control unit 50a performs normal control without prohibiting the heat storage operation. In this case, the process proceeds from step S51 to step S53. In step S53, the heat storage operation control unit 50a determines whether or not the current heat storage amount of the hot water storage tank 4 is less than the startup heat amount. If the current heat storage amount of the hot water storage tank 4 is equal to or greater than the startup heat amount, the process proceeds from step S53 to step S55. When the current heat storage amount of the hot water storage tank 4 is lower than the startup heat amount, the process proceeds from step S53 to step S54. In step S54, the heat storage operation control unit 50a starts a heat storage operation for preventing hot water shortage. The process proceeds from step S54 to step S55. In step S55, the heat storage operation control unit 50a determines whether or not the current heat storage amount of the hot water storage tank 4 exceeds the end heat amount. This end heat quantity is a heat quantity obtained by adding a predetermined heat quantity to the startup heat quantity. If the current heat storage amount in the hot water storage tank 4 does not exceed the end heat amount, a return is made and the process returns to step S50. If the current heat storage amount of the hot water storage tank 4 exceeds the end heat amount, the process proceeds from step S55 to step S56. In step S56, the heat storage operation control unit 50a stops (ends) the heat storage operation. After step S56, the process returns and returns to step S50.

  In the second embodiment, control for prohibiting the heat storage operation is performed as the power consumption suppression control. However, at least one of the startup heat amount of the heat storage operation, the heating capacity of the heat pump unit 2, and the heat pump heating temperature is reduced. Control for limiting or prohibiting hot water filling operation or chasing operation may be performed as power consumption suppression control.

  In the case of the second embodiment, for example, when a power consumption suppression command is received from a power supply company or the like, the user can set in advance whether or not to implement power consumption suppression control. For this reason, it becomes possible for the user to arbitrarily select whether to prioritize the suppression of electricity charges or the use of hot water, and it is possible to prevent usability from deteriorating against the user's intention, Usability can be improved. In particular, in the case of the second embodiment, when the power consumption suppression command is received, the user can individually set for each time zone whether or not to execute the power consumption suppression control. Settings can be made according to lifestyle patterns. For this reason, it is possible to implement power consumption suppression control while more reliably preventing usability deterioration.

  The control device 50 may notify the user of the information on whether or not the power consumption suppression command is received by the receiving unit 50e on the display device 26c of the remote control 26. By notifying the user of whether or not a power consumption suppression command has been received, the user can easily recognize whether or not a command for suppressing power consumption has been received, and usability can be improved.

  FIG. 6 is a diagram illustrating an example of a hardware configuration of the control device 50 provided in the hot water storage type hot water supply system 1 according to the first embodiment and the second embodiment. Each function of the control device 50 is realized by a processing circuit. In the example illustrated in FIG. 6, the processing circuit of the control device 50 includes at least one processor 51 and at least one memory 52. When the processing circuit includes at least one processor 51 and at least one memory 52, each function of the control device 50 is realized by software, firmware, or a combination of software and firmware. At least one of software and firmware is described as a program. At least one of software and firmware is stored in at least one memory 52. At least one processor 51 implements each function of the control device 50 by reading and executing a program stored in at least one memory 52. The at least one processor 51 is also referred to as a CPU (Central Processing Unit), a central processing unit, a processing unit, an arithmetic unit, a microprocessor, a microcomputer, and a DSP (Digital Signal Processor). For example, the at least one memory 52 includes a RAM (Random Access Memory), a ROM (Read Only Memory), a flash memory, an EPROM (Erasable Programmable Read Only Memory, etc.), an EEPROM (Electrically Erasable Memory, etc.). Alternatively, a volatile semiconductor memory, a magnetic disk, a flexible disk, an optical disk, a compact disk, a mini disk, a DVD (Digital Versatile Disc), or the like.

  FIG. 7 is a diagram illustrating another example of the hardware configuration of the control device 50 provided in the hot water storage hot water supply system 1 according to the first embodiment and the second embodiment. In the example illustrated in FIG. 7, the processing circuit of the control device 50 includes at least one dedicated hardware 53. When the processing circuit includes at least one dedicated hardware 53, the processing circuit may be, for example, a single circuit, a composite circuit, a programmed processor, a parallel programmed processor, an ASIC (Application Specific Integrated Circuit), or an FPGA (Field). -Programmable Gate Array), or a combination thereof. The function of each unit of the control device 50 may be realized by a processing circuit. Further, the functions of the respective units of the control device 50 may be realized together by a processing circuit.

  Further, a part of each function of the control device 50 may be realized by the dedicated hardware 53, and the other part may be realized by software or firmware. The processing circuit may realize each function of the control device 50 by hardware 53, software, firmware, or a combination thereof.

  Moreover, it is not limited to the structure by which operation | movement of the hot water storage type hot water supply system 1 is controlled by a single control apparatus, It is set as the structure which controls operation | movement of the hot water storage type hot water supply system 1 by cooperation of a some control apparatus. Also good.

DESCRIPTION OF SYMBOLS 1 Hot water storage type hot water supply system, 2 Heat pump unit, 3 Hot water storage unit, 4 Hot water storage tank, 5a 1st temperature sensor, 5b 2nd temperature sensor, 5c 3rd temperature sensor, 5d 4th temperature sensor, 5e 5th 5th Temperature sensor, 6 Hot water storage tank temperature sensor, 7 General hot water supply side electric mixing valve, 8 Hot water supply pipe, 9 Water supply pipe, 10 Mixed hot water supply pipe, 11 Bath hot water supply side electric mixing valve, 12 Bath side circulation circuit, 13 Solenoid valve, 14 Bath Circulation pump, 15 heat exchanger, 16 tank side circulation circuit, 17 tank circulation pump, 18 mixed bath pipe, 19 hot water flow sensor, 20 hot water temperature sensor, 21 bath flow sensor, 22 bath temperature sensor, 23 water supply Temperature sensor, 24 Heating circulation circuit, 25 Circulation pump, 26 Remote control, 26a Selection switch, 26b determination switch, 26c display device, 27 watt-hour meter, 50 control device, 50a heat storage operation control unit, 50b bath control unit, 50c upper limit value calculation unit, 50d timing unit, 50e reception unit, 50f setting unit, 51 Processor, 52 memory, 53 hardware, 60 controller, 100 network, 110 server computer

Claims (12)

In a hot water storage hot water supply system comprising heating means and a hot water storage tank for storing hot water heated by the heating means,
A heat storage operation control means for controlling a heat storage operation for increasing a heat storage amount of the hot water storage tank;
A power consumption detecting means for detecting an actual power consumption that is an actual power consumption of the hot water storage hot water supply system;
Upper limit calculation means for calculating a sub-period power consumption upper limit value that is an upper limit value of power consumption per sub-period obtained by dividing the unit period into a plurality based on information on the upper limit value of power consumption per unit period; ,
When an excessive power consumption state occurs in which the actual power consumption from the start of the current sub-period exceeds the upper sub-period power consumption upper limit value, the occurrence of the excessive power consumption state is notified to the user. Means for informing;
A hot water storage hot water system.   The heat storage operation control means suppresses the power consumption amount of the heat storage operation when the power consumption excess state occurs compared to a case where the power consumption excess state does not occur. The hot water storage hot water supply system described.   The heat storage operation control means is configured such that when the power consumption excess state occurs, the heat storage amount of the hot water storage tank used as an opportunity to start the heat storage operation is greater than when the power consumption excess state does not occur. The hot water storage hot water supply system according to claim 1 or 2, wherein the heat storage operation is prohibited.   When the state where the actual power consumption from the start of the current sub-period is equal to or higher than a threshold value lower than the sub-period power amount upper limit value is generated, the heat storage operation control unit is compared with before the occurrence of the state. The hot water storage hot water supply system according to claim 1, wherein power consumption of the heat storage operation is suppressed and the heat storage operation is prohibited when the power consumption excess state occurs. A bath control means for controlling either one or both of a hot water filling operation for performing hot water filling to the bathtub and a reheating operation for heating the bathtub water stored in the bathtub;
The said bath control means prohibits or restricts the implementation of either one or both of the hot water filling operation and the chasing operation when the power consumption excess state occurs. The hot water storage hot water supply system according to one item.   When the power consumption excess state occurs in the sub-period that has elapsed this time, the upper limit value calculation unit is configured to perform the sub-period relative to the sub-period that has not yet elapsed among the unit periods to which the sub-period that has elapsed this time belongs. The hot water storage hot water supply system according to any one of claims 1 to 5, wherein the sub-period power amount upper limit value for the sub-period that has not elapsed is corrected so as to decrease an electric energy upper limit value.   The upper limit calculation means, when the actual power consumption of the sub-period that has elapsed this time is less than the upper limit value of the sub-period power consumption, the non-elapsed of the unit period to which the sub-period that has elapsed this time belongs The hot water storage according to any one of claims 1 to 6, wherein the sub-period power amount upper limit value for the sub-period that has not elapsed is corrected so as to increase the sub-period power amount upper limit value for the sub-period. Type hot water supply system. Means capable of performing power consumption suppression control, which is control for suppressing power consumption;
Whether or not to implement the power consumption suppression control when the power consumption amount excess state occurs, a setting means that allows the user to set in advance,
A hot water storage hot water supply system according to any one of claims 1 to 7, further comprising:   The heat storage operation control means is configured so that the actual power consumption in the sub period reaches at least a sub period power amount target value that is lower than the sub period power amount upper limit value. The hot water storage hot water supply system according to any one of claims 1 to 8, wherein the hot water storage system is controlled. Receiving means for receiving a command requesting suppression of power consumption;
Means capable of performing power consumption suppression control, which is control for suppressing power consumption;
Setting means that allows the user to set in advance whether or not to implement the power consumption suppression control;
A hot water storage hot water supply system according to any one of claims 1 to 9, further comprising:   The hot water storage type hot-water supply system according to claim 10, further comprising means for notifying one or both of presence / absence of reception by the receiving means and a setting state of the setting means.   In order to suppress power consumption when notifying the user of the occurrence of the state when the state in which the actual power consumption per unit period exceeds the upper limit value of the power consumption per unit period occurs The hot water storage type hot water supply system according to any one of claims 1 to 11, further comprising means for performing either or both of performing power consumption suppression control, which is control of the above.

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