Control device and control method

Abstract

If the hot water heating operation, which was scheduled for a time period other than the DR control period, is performed by the hot water supply system during the DR control period, there is a possibility that the amount of electricity requested by the increased DR request may not be fully consumed during the DR control period. [Solution] The control device controls a heat pump type hot water supply system. The control unit of the control device receives an increased DR request to increase the amount of electricity consumed in the building during the DR control period. The control unit creates a first schedule to respond to the increased DR request. The first schedule includes executing a first event that consumes hot water in the hot water storage tank, which is expected to occur after the DR control period, by the end of the DR control period, so that the hot water supply system can perform a boiling operation during the DR control period. Alternatively, the first schedule includes increasing the amount of hot water stored so that the hot water supply system can perform a boiling operation during the DR control period.

Description

Technical Field

[0001] It relates to a control device and a control method.

Background Art

[0002] As shown in Patent Document 1 (Japanese Patent Application Laid-Open No. 2018-170925), as a demand response request (hereinafter sometimes referred to as a DR request), from an aggregator, the amount of power consumed in a building during a DR control time period is increased compared to when the request has not been received. It is known to receive an up-DR request. In order to respond to the up-DR request, for example, it is conceivable to cause a hot water supply device to execute a boiling operation scheduled in a time period other than the DR control time period during the DR control time period.

Summary of the Invention

Problems to be Solved by the Invention

[0003] However, in the response of causing a hot water supply device to execute a boiling operation scheduled in a time period other than the DR control time period during the DR control time period, there is a possibility that the amount of power requested by the up-DR request cannot be sufficiently consumed during the DR control time period. If the amount of power requested by the up-DR request cannot be sufficiently consumed during the DR control time period, the merits of the up-DR request cannot be fully enjoyed. In addition, since the up-DR request is an activity that contributes to the environment of effectively consuming the generated energy without wasting it in order to cope with excessive power generation of renewable energy, if the amount of power requested by the up-DR request cannot be sufficiently consumed during the DR control time period, it cannot sufficiently contribute to the environment.

Means for Solving the Problems

[0004] The control device in the first aspect controls a heat pump type hot water supply system. The hot water supply system is installed in a building. The hot water supply system has a tank. The control device comprises a control unit. The control unit receives a first request from the aggregator as a demand response request. The first request is a request to increase the amount of electricity consumed in the building during the first time period compared to when no request has been received. The control unit creates a first schedule to respond to the first request. The first schedule includes executing a first event by the end of the first time period to cause the hot water supply system to perform a heating operation during the first time period. The first event is an event that is expected to occur after the first time period. The first event is an event that consumes hot water in the tank. Alternatively, the first schedule includes increasing the amount of hot water stored compared to when no request has been received to cause the hot water supply system to perform a heating operation during the first time period.

[0005] In the control device of the first perspective, the first schedule includes executing a first event that consumes hot water in the tank, which is expected to occur after the first time period, by the end of the first time period, thereby causing the hot water supply system to perform a heating operation during the first time period. Alternatively, the first schedule includes increasing the amount of hot water stored compared to when no request has been received, thereby causing the hot water supply system to perform a heating operation during the first time period. As a result, the control device can sufficiently consume the amount of electricity requested by the first request during the first time period.

[0006] The control device in the second perspective is the control device in the first perspective, and the control unit determines whether or not to use user equipment, or the amount of power requested by the first request, whether or not a user decision is required to create the first schedule.

[0007] The control device from the second perspective, with this configuration, can create the first schedule after obtaining the user's consent.

[0008] The control device in the third perspective is the control device in the second perspective, and when the control unit determines that a user decision is required, it outputs one or more candidates for the first schedule to the output unit. The control unit creates the first schedule using the specific candidate selected using the input unit.

[0009] The control device from the fourth perspective is the control device from the second perspective, and when the control unit determines that a user decision is required, it outputs information to the output unit asking whether or not to accept the first request.

[0010] The control device of the fifth perspective is the control device of the second perspective, and when the control unit determines that user judgment is not required, it creates a first schedule using a specific candidate selected from one or more candidates of the first schedule based on predetermined conditions.

[0011] The control device of the sixth perspective is one of the control devices of the first to fifth perspectives, and the control unit causes the hot water supply system to heat up an amount of water greater than or equal to the amount of water consumed by executing the first event by performing a heating operation.

[0012] The control device of the seventh perspective is one of the control devices of the first to sixth perspectives, and the control unit cancels the boiling operation of the hot water supply system that was scheduled outside of the first time period.

[0013] The control device of the eighth perspective is a control device of either the first or seventh perspective, and the control unit outputs a notification to the output unit requesting the preparation of user equipment before executing the first event if preparation of user equipment is required to execute the first event.

[0014] The control device of the ninth perspective is a control device of either the first perspective or the eighth perspective, and the control unit cancels the execution of the first event if the user equipment for executing the first event is not ready before executing the first event.

[0015] The control device of the 10th perspective is one of the control devices of the 1st to 9th perspectives, and the control unit selects from among multiple candidates for the first schedule, prioritizing candidates that do not utilize user equipment. The control unit creates the first schedule based on the selected candidate.

[0016] The control device of the 11th perspective is one of the control devices of the 1st to 9th perspectives, and the control unit selects from among multiple candidates for the first schedule that have a high power consumption for the hot water heater. The control unit creates the first schedule based on the selected candidate.

[0017] The control device of the 12th perspective is one of the control devices of the 1st to 9th perspectives, and the control unit selects the candidate with the lowest cost from among several candidates for the first schedule. The control unit creates the first schedule based on the selected candidate.

[0018] The control method for the 13th aspect is performed by a computer. The control method controls a heat pump type hot water supply system. The hot water supply system is installed in a building. The hot water supply system has a tank. The computer includes a control unit. The control unit receives a first request from the aggregator as a demand response request. The first request is a request to increase the amount of electricity consumed in the building during the first time period compared to when no request has been received. The control unit creates a first schedule to respond to the first request. The first schedule includes executing a first event by the end of the first time period to cause the hot water supply system to perform a heating operation during the first time period. The first event is an event that is expected to occur after the first time period. The first event is an event that consumes the hot water in the tank. Alternatively, the first schedule includes increasing the amount of hot water stored compared to when no request has been received to cause the hot water supply system to perform a heating operation during the first time period.

[0019] In the control method of the 13th aspect, the first schedule includes causing the first event that consumes the hot and cold water in the tank, which is predicted to be executed after the first time period, to be executed by the end time of the first time period, and causing the water supply device to perform a boiling operation in the first time period. Alternatively, the first schedule includes increasing the amount of stored hot water compared to when no request is received and causing the water supply device to perform a boiling operation in the first time period. As a result, the control method can sufficiently consume the amount of electric power requested by the first request in the first time period.

Brief Description of the Drawings

[0020] [Figure 1] It is a schematic configuration diagram of a water supply device and a control device. [Figure 2] It is a functional block diagram of the water supply device. [Figure 3] It is a functional block diagram of the control device. [Figure 4] It is a diagram showing an example of display on the display unit. [Figure 5A] It is a flowchart for explaining the processing of the control device. [Figure 5B] It is a flowchart for explaining the processing of the control device.

Modes for Carrying Out the Invention

[0021] (1) Overall Configuration 3] The control device 200 controls the heat pump type water supply device 100 provided in the building 98 in response to a demand response request (hereinafter, may be referred to as a DR request).

[0022] Demand response means that a user (consumer) who receives power supply from a commercial power system adjusts the power consumption of the commercial power system in response to a request from an aggregator 90 that adjusts the power supply and demand balance between the user and a general power transmission and distribution business operator or a retail electricity business operator. The general power transmission and distribution business operator or the retail electricity business operator pays a reward, which is the consideration for demand response, to the user according to the amount of adjustment of the power consumption of the commercial power system.

[0023] Figure 1 is a schematic configuration diagram of the water supply device 100 and the control device 200. The aggregator 90 and the control device 200 are communicably connected via a network NW1 such as the Internet. The control device 200 and the water supply device 100 are communicably connected via a network NW2 such as a LAN.

[0024] The control device 200 receives a DR request from the aggregator 90 via the network NW1. The control device 200 controls the water supply device 100 according to the received DR request. The control device 200 may notify the user of the DR request by transmitting the received DR request to a portable information terminal 91 such as a smartphone or a tablet owned by the user via the network NW2.

[0025] (2) Detailed Configuration (2-1) Water Supply Device The water supply device 100 mainly includes a heat pump unit 110, a hot water storage unit 120, a remote controller 130, and a control unit 190. A water supply section, a bathtub, a heating device, the heat pump unit 110, and a stop valve 160 are connected to the hot water storage unit 120.

[0026] The heat pump unit 110 heats the hot water supplied from the hot water storage unit 120 and supplies the heated hot water to the hot water storage unit 120. The hot water storage unit 120 stores the heated hot water supplied from the heat pump unit 110, mixes the stored hot water with the water supplied from the stop valve 160, and supplies it to the water supply section and the bathtub. Further, the hot water storage unit 120 stores the heated hot water supplied from the heat pump unit 110 and supplies the stored hot water to the heating device 170. The water supply section is, for example, a faucet and a shower. The water supply section may be connected to a dishwasher or a washing machine. The heating device 170 is, for example, a floor heating device and a panel heater. The stop valve 160 is connected to an external water supply source such as a water supply. The stop valve 160 is operated to supply water to the hot water storage unit 120.

[0027] Here, "hot water" refers to at least one of hot water and cold water. Therefore, both the water before it is heated by the heat pump unit 110 and the water after it has been heated by the heat pump unit 110 are referred to as "hot water."

[0028] (2-1-1) Heat pump unit The heat pump unit 110 mainly comprises a compressor 11, a water heat exchanger, an expansion valve 13, and an air heat exchanger. The compressor 11, water heat exchanger, expansion valve 13, and air heat exchanger are connected in a ring by refrigerant piping to form a heat pump cycle. The discharge side of the compressor 11 is connected to the water heat exchanger, and the suction side of the compressor 11 is connected to the air heat exchanger. One end of the expansion valve 13 is connected to the water heat exchanger, and the other end of the expansion valve 13 is connected to the air heat exchanger. The heat pump unit 110 also has a first control device 10.

[0029] The compressor 11 has a compression mechanism that compresses the refrigerant by driving the motor 11a. The refrigerant compressed by the compressor 11 is sent to the water heat exchanger. The capacity of the heat pump unit 110 can be adjusted by controlling the operating frequency of the motor 11a.

[0030] The water heat exchanger heats the hot water supplied from the hot water storage unit 120 by exchanging heat between the high-temperature refrigerant compressed by the compressor 11 and the hot water. The water heat exchanger is, for example, a double-tube heat exchanger consisting of an outer tube and an inner tube inserted inside the outer tube. The water heat exchanger may also be a plate-type heat exchanger or the like. The capacity of the heat pump unit 110 is, for example, the amount of heat that the water heat exchanger transfers to the hot water supplied from the hot water storage unit 120 per unit time.

[0031] The expansion valve 13 reduces the pressure of the refrigerant that has passed through the water heat exchanger and undergone heat exchange. The expansion valve 13 is, for example, an electrically operated expansion valve. The expansion valve 13 may also be a capillary tube or the like.

[0032] The air heat exchanger heats the refrigerant by exchanging heat between the refrigerant, which has been depressurized after passing through the expansion valve 13, and the outside air. Outside air is supplied to the air heat exchanger, for example, by an outside air fan. The refrigerant that has undergone heat exchange after passing through the air heat exchanger is sent to the compressor 11.

[0033] (2-1-2) Hot water storage unit The hot water storage unit 120 mainly comprises a hot water storage tank (tank), a drain valve 22, an inlet valve 23, a boiling pump 24, a reheating pump 34, and a reheating heat exchanger. The hot water storage unit 120 also has a second control device 20.

[0034] The hot water storage tank stores hot water. Multiple tank temperature sensors T are installed in the hot water storage tank near the top surface of the tank and on the sides of the tank at intervals from top to bottom. As the density of water changes with temperature, the hot water stored in the hot water storage tank forms layers where the top is hotter and the bottom is colder. Therefore, the temperature distribution of the hot water in the hot water storage tank in the vertical direction is detected based on the output signals of each of the multiple tank temperature sensors T. Here, the amount of hot water stored in the hot water storage tank is the amount of heat that can be supplied as hot water at the user-set temperature, such as the hot water supply temperature. In other words, the amount of hot water stored in the hot water storage tank is the amount of hot water that can be supplied as hot water at the user-set temperature. The amount of hot water that can be supplied as hot water at the user-set temperature is the amount of hot water from the top surface of the hot water storage tank to the position of a specific tank temperature sensor T for detecting hot water at the user-set temperature.

[0035] The drain valve 22 is operated, for example, to discharge the hot water in the hot water storage tank to the outside.

[0036] (2-1-3) Remote controller The remote controller 130 is a user interface for controlling the hot water heater 100. The remote controller 130 is installed, for example, in the kitchen and bathroom. The remote controller 130 is connected to the first control device 10 and the second control device 20 so as to be able to communicate data bidirectionally via wireless or wired communication. Signals for instructing the operation of the hot water heater 100 are input to the first control device 10 and the second control device 20 from the remote controller 130 via wireless or wired communication. In addition to the remote controller 130, a portable information terminal 91 may be used as a user interface for the hot water heater 100.

[0037] The remote controller 130 has a display unit 130a and an operation unit 130b. The display unit 130a is, for example, a liquid crystal display or an organic EL display.

[0038] The display unit 130a displays information regarding the status of the hot water supply unit 100, and information regarding the settings of the hot water supply unit 100. For example, the display unit 130a displays user-set temperatures such as the temperature of the hot water supplied to the hot water supply unit and the bathtub (hot water supply temperature), the amount of hot water stored in the hot water storage tank, and one or more candidates for the first schedule D2, which will be described later.

[0039] The control unit 130b includes buttons, dials, keys, etc., for the user of the hot water heater 100 to operate. The user of the hot water heater 100 operates the control unit 130b to input information such as the hot water temperature setting. The display unit 130a may be a touchscreen that also functions as the control unit 130b.

[0040] (2-1-4) Control Unit The control unit 190 mainly consists of a first control device 10 for the heat pump unit 110 and a second control device 20 for the hot water storage unit 120. The first control device 10 and the second control device 20 typically consist of a microcomputer equipped with a control calculation device and a memory device, and input / output circuits. The control calculation device is a processor such as a CPU or GPU. The control calculation device reads a control program stored in the memory device and controls the operation of the hot water supply device 100 according to the control program. The control calculation device can write calculation results to the memory device or read information stored in the memory device according to the control program.

[0041] Figure 2 is a functional block diagram of the hot water supply system 100. As shown in Figure 2, the control unit 190 controls the compressor 11, expansion valve 13, drain valve 22, inlet valve 23, boiling pump 24, reheating pump 34, and shut-off valve 160, etc., based on signals from each of the multiple tank temperature sensors T. The control unit 190 is also connected to the control device 200 in a communication manner.

[0042] The control unit 190 periodically acquires the measured values ​​of each of the multiple tank temperature sensors T, the operating frequency of the compressor motor 11a, the opening degree of the expansion valve 13, the status of the drain valve 22, the status of the inlet valve 23, the rotational speed of the boiling pump 24, the rotational speed of the reheating pump 34, the status of the shut-off valve 160, etc., as operating data D1. The control unit 190 periodically transmits the acquired operating data D1 to the control device 200.

[0043] The control unit 190 primarily performs boiling operation, hot water supply operation, bath filling operation, reheating operation, and heating operation.

[0044] (2-1-4-1) Boiling operation The boiling operation is the operation in which the heat pump unit 110 heats the hot water in the hot water storage tank. In the boiling operation, the boiling pump 24 is driven, which guides the hot water in the hot water storage tank to the water heat exchanger where it is heated. The hot water heated in the water heat exchanger is returned to the hot water storage tank. In this way, in the boiling operation, the hot water in the hot water storage tank is heated in the water heat exchanger while being circulated.

[0045] The control unit 190 performs the boiling operation by controlling the compressor 11, expansion valve 13, inlet valve 23, boiling pump 24, and shut-off valve 160. The control unit 190 operates the shut-off valve 160 as needed to supply hot water to the hot water storage tank. The control unit 190 controls the operating frequency of the motor 11a of the compressor 11 and the opening degree of the expansion valve 13 to adjust the capacity of the heat pump unit 110 and the temperature of the hot water heated in the water heat exchanger (outlet temperature), etc. The control unit 190 controls the rotation speed of the boiling pump 24 to adjust the outlet temperature, the amount of hot water stored in the hot water storage tank, and the flow rate of hot water supplied to the hot water storage tank (storage flow rate), etc.

[0046] Increasing the hot water storage capacity and performing a boiling operation means, for example, changing a specific tank temperature sensor T used to detect hot water at the user-set temperature to a lower tank temperature sensor T and performing a boiling operation. By changing a specific tank temperature sensor T used to detect hot water at the user-set temperature to a lower tank temperature sensor T and performing a boiling operation, the control unit 190 can increase the amount of hot water (storage capacity) in the hot water storage tank that can be supplied as hot water at the user-set temperature.

[0047] Furthermore, increasing the amount of hot water stored and performing a boiling operation means, for example, raising the set temperature of the hot water storage tank and performing a boiling operation. By raising the set temperature of the hot water storage tank and performing a boiling operation, the control unit 190 can increase the amount of heat (storage volume) that can be supplied as hot water at the user-set temperature in the hot water storage tank.

[0048] The control unit 190 may acquire the hot water outlet temperature, hot water storage volume, and storage flow rate based on the operating frequency of the motor 11a of the compressor 11, the opening degree of the expansion valve 13, the rotational speed of the boiling pump 24, and the output signals of each of the multiple tank temperature sensors T.

[0049] The control unit 190 may perform a boiling operation upon receiving a boiling operation start signal from the control device 200, which includes predetermined target values ​​for the hot water outlet temperature, hot water storage volume, and storage flow rate.

[0050] (2-1-4-2) Hot water supply operation Hot water supply operation is the operation of dispensing hot water from the hot water storage tank through the hot water supply unit. In hot water supply operation, if the hot water supply unit is a faucet, opening the faucet valve allows water from the outside to be supplied into the hot water storage tank from the bottom due to the water supply pressure. This pushes out the high-temperature hot water stored in the hot water storage tank from the top of the tank.

[0051] Then, the hot water from the storage tank is mixed with water from an external source. The mixed water is then discharged from the hot water supply unit.

[0052] When the hot water supply unit is opened by the user, the control unit 190 performs hot water supply operation. During hot water supply operation, the control unit 190 controls the mixing ratio of high-temperature hot water from the hot water storage tank and water from the outside, according to the temperature of the hot water supplied from the hot water supply unit.

[0053] If the hot water supply unit is connected to a dishwasher or washing machine, the control unit 190 may perform hot water supply operation in conjunction with the operation of the dishwasher or washing machine by receiving a hot water supply start signal from the control device 200.

[0054] (2-1-4-3) Bath filling operation The "hot water filling" operation is the process of supplying hot water from the hot water storage tank into the bathtub. During the hot water filling operation, water from an external source is supplied to the hot water storage tank from the bottom due to the water supply pressure. This pushes out the high-temperature hot water stored in the hot water storage tank from the top.

[0055] Then, hot water from the storage tank is mixed with water from an external source. The mixed water is then supplied to the bathtub.

[0056] When the control unit 190 receives a signal to start the bath filling operation via the user's operation of the remote controller 130, it executes the bath filling operation. During the bath filling operation, the control unit 190 controls the mixing ratio of high-temperature hot water from the hot water storage tank and water from the outside, according to the temperature of the hot water supplied to the bathtub.

[0057] The control unit 190 may perform a boiling operation upon receiving a signal from the control device 200 to start the hot water filling operation.

[0058] Furthermore, the control unit 190 may terminate the bath filling operation if it receives a signal to end the bath filling operation via operation of the remote controller 130 by the user during the bath filling operation, or if the water level in the bathtub detected by a water level sensor (not shown) installed in the bathtub reaches a predetermined target value.

[0059] The system is designed to assume that the user will close the bathtub drain plug when the bath filling operation starts. However, the control unit 190 may also close the bathtub drain plug when the bath filling operation starts. In this case, the bathtub drain plug may be, for example, an electrically operated plug.

[0060] (2-1-4-4) Reheating operation Reheating operation is an operation in which the water in the bathtub is heated in a reheating heat exchanger and returned to the bathtub. In reheating operation, by driving the reheating pump 34, a portion of the water in the bathtub is guided to the reheating heat exchanger and heated. The water heated in the reheating heat exchanger is returned to the bathtub. In this way, in reheating operation, the water in the bathtub is heated in the reheating heat exchanger while being circulated.

[0061] The reheating heat exchanger performs heat exchange between the high-temperature water supplied from the hot water storage tank and the low-temperature water supplied from the bathtub. In this way, the reheating heat exchanger heats the water supplied from the bathtub. The reheating heat exchanger may be, for example, a counter-flow type heat exchanger in which the high-temperature water and the low-temperature water flow in opposite directions to perform heat exchange.

[0062] When the control unit 190 receives a signal to start the reheating operation via the user's operation of the remote controller 130, it drives the boiling pump 24 and the reheating pump 34 to perform the reheating operation. During the reheating operation, the control unit 190 controls the rotation speed of the boiling pump 24 and the reheating pump 34 according to the temperature of the water in the bathtub and the temperature of the water returned to the bathtub from the reheating heat exchanger.

[0063] The control unit 190 may perform a reheating operation upon receiving a reheating operation start signal from the control device 200.

[0064] Furthermore, the control unit 190 may terminate the reheating operation by stopping the reheating pump 34 when it receives a signal to terminate the reheating operation via the remote controller 130 operated by the user, or when the temperature of the bathwater reaches a predetermined target value.

[0065] (2-1-4-5) Heating operation Heating operation is the process of heating the heating heat exchanger within the heating system using high-temperature hot water supplied from a hot water storage tank. In other words, during heating operation, the hot water in the storage tank is circulated and heated in the heating heat exchanger. If the heating system is a floor heating system, the heated heating heat exchanger heats the floor. If the heating system is a panel heater, the heated heating heat exchanger heats the panels.

[0066] When the control unit 190 receives a heating operation start signal via the user's operation of the remote controller 130, it drives the boiling pump 24 to perform heating operation. During heating operation, the control unit 190 controls the rotation speed of the boiling pump 24.

[0067] The control unit 190 may perform heating operation upon receiving a heating operation start signal from the control device 200.

[0068] (2-2) Control device The control device 200 is a computer installed in the building 98. The control device 200 is, for example, a controller for a HEMS (Home Energy Management System). Figure 3 is a control block diagram of the control device 200. As shown in Figure 3, the control device 200 mainly includes a storage unit 41, an input unit 42, a display unit 43, a communication unit 44, and a control unit 49.

[0069] The memory unit 41 is a storage device such as RAM, ROM, and HDD. The memory unit 41 stores programs executed by the control unit 49 and data necessary for program execution. The input unit 42 is an input interface such as a keyboard, mouse, and touch panel. Various commands and information can be input to the control device 200 using the input unit 42. The display unit 43 is an output interface such as a monitor and touch panel. The display unit 43 can display various data stored in the memory unit 41. The communication unit 44 is a network interface device for communicating with the aggregator 90, the water heater 100, etc., via networks NW1 and NW2.

[0070] (2-2-1) Control Unit The control unit 49 is a processor such as a CPU and GPU. The control unit 49 reads and executes programs stored in the memory unit 41 and realizes various functions of the control device 200. The control unit 49 can also write calculation results to the memory unit 41 and read information stored in the memory unit 41 according to the program.

[0071] For example, the control unit 49 causes the hot water supply unit 100 to perform various operations by transmitting start signals for boiling operation, hot water supply operation, bath filling operation, reheating operation, and heating operation to the hot water supply unit 100.

[0072] For example, if there is a schedule for performing various operations of the hot water supply system 100, the control unit 49 will cause the hot water supply system 100 to perform the various operations according to that schedule.

[0073] As shown in Figure 3, the control unit 49 has, as functional blocks, an acquisition unit 491, a calculation unit 492, a creation unit 493, a DR determination unit 494, and a DR execution unit 495.

[0074] (2-2-1-1) Acquisition section The acquisition unit 491 receives a DR request from the aggregator 90 via the network NW1. In this embodiment, the acquisition unit 491 receives an increased DR request (first request) from the aggregator 90 as a DR request. An increased DR request is a request to increase the amount of electricity consumed in the building 98 during the DR control time period (first time period) compared to when no request is received. In this embodiment, the DR control time period is assumed to be from 11:00 to 16:00.

[0075] The acquisition unit 491 periodically acquires operation data D1 from the hot water heater 100 via the network NW2. The acquisition unit 491 stores the acquired operation data D1 in the storage unit 41.

[0076] (2-2-1-2) Calculation section The calculation unit 492 calculates the power consumption when the hot water supply unit 100 performs various operations under various conditions during the DR control period, based on the operation data D1. For example, the calculation unit 492 calculates the power consumption when a boiling operation is performed during the DR control period, where the hot water outlet temperature, hot water storage volume, and storage flow rate are set to predetermined target values.

[0077] The calculation unit 492 calculates the power consumption when the hot water supply system 100 performs various operations under various conditions during the DR control period, based on, for example, the operating frequency of the motor 11a of the compressor 11, the rotational speed of the boiling pump 24, and the rotational speed of the reheating pump 34, which are included in the operation data D1.

[0078] (2-2-1-3) Creation Department The creation unit 493 creates a first schedule D2 to respond to the DR request, based on the power consumption when the hot water supply unit 100 performs various operations according to various conditions during the DR control period, and the amount of power requested by the DR request.

[0079] The first schedule D2 includes executing the first event by the end of the DR control time period, and then causing the hot water supply unit 100 to perform a boiling operation during the DR control time period.

[0080] The first event is an event that consumes hot water in the hot water storage tank, which is expected to occur after the DR control time period. Events expected to occur after the DR control time period include, for example, events that are scheduled to occur after the DR control time period, and events that are expected to occur after the DR control time period based on the operation data D1. Events that consume hot water in the hot water storage tank include events that circulate the water in the hot water storage tank. Events that consume hot water in the hot water storage tank include, for example, hot water supply operation, bath filling operation, reheating operation, and heating operation. An event that consumes hot water in the hot water storage tank may also be, for example, an event that operates the drain valve 22 to discharge the hot water in the hot water storage tank to the outside.

[0081] The control unit 49, for example, causes the hot water supply unit 100 to heat up an amount of water greater than or equal to the amount of water consumed by executing the first event, by having it perform a heating operation.

[0082] Alternatively, the first schedule D2 includes increasing the amount of hot water stored compared to when no DR request is received, causing the hot water supply unit 100 to perform boiling operation during the DR control period. The amount of hot water stored when no DR request is received is predicted, for example, based on operation data D1. The amount of hot water stored when no DR request is received is set, for example, by the user operating the remote controller 130 or the input unit 42.

[0083] First, the creation unit 493 creates one or more candidates for the first schedule D2. One candidate for the first schedule D2 is to increase the amount of hot water stored for one hour from 14:00 compared to when no DR request for increased water pressure is received, and have the hot water supply unit 100 perform a boiling operation. Another candidate for the first schedule D2 is to have the hot water supply unit 100 perform a hot water filling operation from 15:00, and then have the hot water supply unit 100 perform a boiling operation until 16:00. Another candidate for the first schedule D2 is to have the hot water supply unit 100 perform a hot water filling operation from 14:00, perform a hot water supply operation from 15:00 in conjunction with the operation of the dishwasher, and then have the hot water supply unit 100 perform a boiling operation until 16:00. Another candidate for the first schedule D2 is to have the hot water supply unit 100 perform a hot water filling operation from 14:00, and then have the hot water supply unit 100 perform a boiling operation until 15:00, with an increased amount of hot water stored compared to when no DR request for increased water pressure is received.

[0084] Next, the creation unit 493 determines whether or not user equipment is used to create the first schedule D2, based on whether or not user equipment is used. User equipment includes, for example, dishwashers, washing machines, bathtubs, and heating devices (floor heating devices, panel heaters). In this embodiment, the creation unit 493 determines that user judgment is required to create the first schedule D2 if one or more of the created first schedule D2 candidates include a candidate that uses user equipment. A candidate that uses user equipment is, for example, a candidate that causes the hot water supply device 100 to perform a bath filling operation from 15:00, and then causes the hot water supply device 100 to perform a heating operation until 16:00.

[0085] If the creation unit 493 determines that a user decision is required, it displays (outputs) information on the display unit 130a (output unit) asking whether to accept or reject the increased DR request, and one or more candidates for the created first schedule D2. Figure 4 shows an example of the display on the display unit 130a. In Figure 4, the information asking whether to accept or reject the increased DR request is displayed as "Accept increased DR request" and "Do not accept increased DR request". Also in Figure 4, four candidates for the created first schedule D2 are displayed: "Increase hot water storage volume and boil operation for 1 hour from 14:00 4 points", "Hot water filling operation from 15:00 3 points", "Hot water filling operation and dishwasher operation from 15:00 6 points", and "Automatic 5 points". As the "Automatic 5 points" candidate, the creation unit 493 may, for example, prioritize selecting a candidate that does not use user equipment from among multiple candidates for the first schedule D2. As a candidate for "Leave it to us, 5 points," the creation unit 493 may, for example, prioritize selecting a candidate with high power consumption for the water heater 100 from among multiple candidates in the first schedule D2. As a candidate for "Leave it to us, 5 points," the creation unit 493 may, for example, prioritize selecting a candidate with low charges, including electricity and water charges, from among multiple candidates in the first schedule D2. The number of points shown in Figure 4 corresponds to the reward, which is the compensation for demand response.

[0086] The creation unit 493 creates the first schedule D2 using a specific candidate selected by the user via the operation unit 130b (input unit).

[0087] For example, in Figure 4, if the option "Increase hot water storage volume and start boiling operation for 1 hour from 14:00 (4 points)" is selected, the creation unit 493 will create a first schedule D2 in which the hot water storage volume will be increased from 14:00 for 1 hour compared to when no DR request has been received, and the hot water supply unit 100 will perform a boiling operation. For example, in Figure 4, if the option "Fill the bathtub with hot water from 15:00 (3 points)" is selected, the creation unit 493 will create a first schedule D2 in which the hot water supply unit 100 will start filling the bathtub with hot water from 15:00, and then perform a boiling operation until 16:00. For example, in Figure 4, if the option "Fill the bathtub with hot water from 14:00, start the dishwasher from 15:00 (6 points)" is selected, the creation unit 493 will create a first schedule D2 in which the hot water supply unit 100 will start filling the bathtub with hot water from 14:00, start hot water supply operation in conjunction with the operation of the dishwasher from 15:00, and then perform a boiling operation until 16:00. For example, in Figure 4, if the option "Automatic 5 points" is selected, the creation unit 493 creates the first schedule D2 based on the previously selected option. In Figure 4, the option "Starting at 15:00, fill the bathtub with hot water 3 points" has been selected by the user.

[0088] The creation unit 493 may use a portable information terminal 91 as a user interface in addition to the remote controller 130.

[0089] The creation unit 493 stores the created first schedule D2 in the storage unit 41.

[0090] On the other hand, if the creation unit 493 determines that user judgment is not required, it creates the first schedule D2 using a specific candidate selected from one or more candidates for the first schedule D2 based on predetermined conditions. The creation unit 493 may, for example, prioritize selecting a candidate from among multiple candidates for the first schedule D2 that does not utilize user equipment. The creation unit 493 may, for example, prioritize selecting a candidate from among multiple candidates for the first schedule D2 that has a high power consumption for the water heater 100. The creation unit 493 may, for example, prioritize selecting a candidate from among multiple candidates for the first schedule D2 that has low charges, including electricity and water charges.

[0091] (2-2-1-4) DR judgment section The DR determination unit 494 determines whether or not to accept the request for an upgraded DR.

[0092] In this embodiment, the DR determination unit 494 determines to accept the raise DR request if the creation unit 493 determines that a user decision is required and the user selects to "accept the raise DR request". In Figure 4, the user selects the candidate "Starting at 15:00, fill the bathtub with hot water, 3 points", which indicates that "accept the raise DR request" has been selected. The DR determination unit 494 also determines to accept the raise DR request if the creation unit 493 determines that a user decision is not required.

[0093] If the DR determination unit 494 determines that it will accept the increased DR request, it transmits information to the aggregator 90 indicating that it will accept the increased DR request, as well as the amount of power that can be accepted.

[0094] On the other hand, the DR determination unit 494 determines that the creation unit 493 requires a user decision, and if the user selects "do not accept the upgraded DR request", it determines that the upgraded DR request will not be accepted.

[0095] If the DR determination unit 494 determines that it will not accept the upgrade DR request, it transmits information such as the fact that it will not accept the upgrade DR request to the aggregator 90.

[0096] (2-2-1-5) DR Execution Unit If the DR execution unit 495 determines that the DR determination unit 494 accepts the increased DR request, it causes the hot water supply unit 100 to perform various operations according to the first schedule D2. The DR execution unit 495 may also cancel the boiling operation of the hot water supply unit 100 that was scheduled outside the DR control period in order to further increase the amount of electricity consumed in the building 98 during the DR control period.

[0097] If the DR execution unit 495 requires user equipment to be prepared in order to execute the first event, it may display a notification on the display unit 130a requesting the preparation of user equipment before executing the first event. For example, if the first event is a bath filling operation and the user equipment is a bathtub, the preparation of the user equipment is to close the drain plug of the bathtub. For example, if the first event is a reheating operation and the user equipment is a bathtub, the preparation of the user equipment is to fill the bathtub with a predetermined amount of water.

[0098] The DR execution unit 495 may cancel the execution of the first event if it is not ready to execute the first event before executing it. For example, if the first event is a bath filling operation and the user equipment is a bathtub, the DR execution unit 495 uses a sensor to detect whether or not the bathtub drain plug is closed. For example, if the first event is a reheating operation and the user equipment is a bathtub, the DR execution unit 495 uses a water level sensor to detect whether or not a predetermined amount of water is in the bathtub.

[0099] (3) Processing An example of the processing performed by the control device 200 will be explained using the flowcharts in Figures 5A and 5B.

[0100] As shown in step S1, the control device 200 receives a DR request from the aggregator 90.

[0101] After completing step S1, as shown in step S2, the control device 200 creates one or more candidates for the first schedule D2 to respond to the DR request, based on the power consumption when the hot water supply device 100 performs various operations under various conditions, the amount of power requested by the DR request, and the DR control time period.

[0102] After completing step S2, as shown in step S3, the control device 200 determines whether a user decision is required to create the first schedule D2, based on whether or not user equipment is used. If a user decision is required, the process proceeds to step S4. If a user decision is not required, the process proceeds to step S7.

[0103] When the process proceeds from step S3 to step S4, the control device 200 displays on the display unit 130a information asking whether or not to accept the request for raising the DR, and one or more candidates for the created first schedule D2.

[0104] When the process proceeds from step S4 to step S5, the control device 200 uses the operation unit 130b to determine whether the user has selected a specific candidate or has selected "Do not accept the request to raise DR". If the user has selected a specific candidate, the process proceeds to step S6. If the user has selected "Do not accept the request to raise DR", the process proceeds to step S11.

[0105] Moving from step S5 to step S6, the control device 200 creates a first schedule D2 based on a specific candidate selected by the user.

[0106] When proceeding from step S3 to step S7, the control device 200 creates the first schedule D2 using a specific candidate selected from one or more candidates for the first schedule D2 based on predetermined conditions.

[0107] Upon completion of step S6 or step S7, the control device 200 determines to accept the DR request, as shown in step S8.

[0108] Upon completion of step S8, as shown in step S9, the control device 200 transmits information to the aggregator 90 indicating that it accepts the DR request, as well as the amount of power that can be accepted.

[0109] Upon completion of step S9, as shown in step S10, the control device 200 causes the hot water supply device 100 to perform various operations according to the first schedule D2.

[0110] When the system proceeds from step S5 to step S11, the control device 200 determines that it will not accept the request for raising the DR.

[0111] After completing step S11, as shown in step S12, the control device 200 transmits information to the aggregator 90, such as that it does not accept the DR request.

[0112] (4) Features (4-1) Conventionally, it is known that DR requests include receiving an "upgrade DR" request from an aggregator, which increases the amount of electricity consumed in a building during the DR control period compared to when no request is received. To respond to an upgrade DR request, for example, one could consider having the hot water supply system perform a boiling operation that was scheduled for a different time period than the DR control period during the DR control period.

[0113] However, if the hot water supply system is made to perform boiling operations that were scheduled for a different time period than the DR control period during the DR control period, there is a possibility that the amount of electricity requested by the increased DR request will not be fully consumed during the DR control period. If the amount of electricity requested by the increased DR request cannot be fully consumed during the DR control period, the benefits of the increased DR request cannot be fully enjoyed. Furthermore, since the increased DR request is an environmentally beneficial activity that effectively consumes generated energy instead of wasting it as a response to the excess generation of renewable energy, if the amount of electricity requested by the increased DR request cannot be fully consumed during the DR control period, it will not be able to fully contribute to the environment.

[0114] The control device 200 of this embodiment controls a heat pump type hot water supply system 100. The hot water supply system 100 is installed in a building 98. The hot water supply system 100 has a hot water storage tank (tank). The control device 200 includes a control unit 49. The control unit 49 receives an increased DR request (first request) from the aggregator 90 as a DR request. An increased DR request is a request to increase the amount of electricity consumed in the building 98 during the DR control time period (first time period) compared to when no DR request is received. The control unit 49 creates a first schedule D2 to respond to the increased DR request. The first schedule D2 includes executing a first event by the end of the DR control time period to cause the hot water supply system 100 to perform a boiling operation during the DR control time period. The first event is an event that is expected to occur after the DR control time period. The first event is an event that consumes hot water in the hot water storage tank. Alternatively, the first schedule D2 includes increasing the amount of hot water stored compared to when no DR request is received, and causing the hot water supply unit 100 to perform boiling operation during the DR control period.

[0115] In the control device 200 of this embodiment, the first schedule D2 includes executing a first event that consumes hot water in the hot water storage tank, which is expected to occur after the DR control period, by the end of the DR control period, causing the hot water supply device 100 to perform a boiling operation during the DR control period. Alternatively, the first schedule D2 includes increasing the amount of hot water stored compared to when no DR request is received, causing the hot water supply device 100 to perform a boiling operation during the DR control period. As a result, the control device 200 can sufficiently consume the amount of electricity requested by the increased DR request during the DR control period.

[0116] (4-2) In the control device 200 of this embodiment, the control unit 49 determines whether or not a user decision is necessary to create the first schedule D2, based on whether or not user equipment is used.

[0117] As a result, the control device 200 can create the first schedule D2 with the user's consent.

[0118] (4-3) In the control device 200 of this embodiment, if the control unit 49 determines that a user decision is required, it displays (outputs) one or more candidates for the first schedule D2 on the display unit 130a (output unit). The control unit 49 creates the first schedule D2 using the specific candidate selected using the operation unit 130b (input unit).

[0119] (4-4) In the control device 200 of this embodiment, if the control unit 49 determines that a user decision is required, it displays information on the display unit 130a asking whether or not to accept the request for an upgraded DR.

[0120] (4-5) In the control device 200 of this embodiment, if the control unit 49 determines that user judgment is not required, it creates the first schedule D2 using a specific candidate selected from one or more candidates for the first schedule D2 based on predetermined conditions.

[0121] (4-6) In the control device 200 of this embodiment, the control unit 49 causes the hot water supply device 100 to heat up an amount of water greater than or equal to the amount of water consumed by executing the first event.

[0122] (4-7) In the control device 200 of this embodiment, the control unit 49 cancels the boiling operation of the hot water supply device 100 that was scheduled outside the DR control time period.

[0123] (4-8) In the control device 200 of this embodiment, if the control unit 49 determines that user equipment needs to be prepared in order to execute the first event, it displays a notification on the display unit 130a requesting the preparation of user equipment before executing the first event.

[0124] (4-9) In the control device 200 of this embodiment, the control unit 49 cancels the execution of the first event if the user equipment for executing the first event is not ready before executing the first event.

[0125] (4-10) In this embodiment, the control method is performed by a control device 200 (computer). The control method controls a heat pump type hot water supply system 100. The hot water supply system 100 is installed in building 98. The hot water supply system 100 has a hot water storage tank. The control device 200 includes a control unit 49. The control unit 49 receives an increased DR request from the aggregator 90 as a DR request. An increased DR request is a request to increase the amount of electricity consumed in building 98 during the DR control period compared to when no DR request is received. The control unit 49 creates a first schedule D2 to respond to the increased DR request. The first schedule D2 includes executing a first event by the end of the DR control period to cause the hot water supply system 100 to perform a boiling operation during the DR control period. The first event is an event that is expected to occur after the DR control period. The first event is an event that consumes hot water in the hot water storage tank. Alternatively, the first schedule D2 includes increasing the amount of hot water stored compared to when no DR request is received, and causing the hot water supply unit 100 to perform boiling operation during the DR control period.

[0126] In the control method of this embodiment, the first schedule D2 includes executing a first event that consumes hot water in the hot water storage tank, which is expected to be executed after the DR control period, by the end of the DR control period, so that the hot water supply device 100 can perform a boiling operation during the DR control period. Alternatively, the first schedule D2 includes increasing the amount of hot water stored compared to when no DR request is received, so that the hot water supply device 100 can perform a boiling operation during the DR control period. As a result, the control method can sufficiently consume the amount of electricity requested by the increased DR request during the DR control period.

[0127] (5) Variant (5-1) Variation 1A As shown in Figure 5A, in this embodiment, after receiving an upward DR request from the aggregator 90 (step S1), the control device 200 creates one or more candidates for the first schedule D2 (step S2).

[0128] However, instead of receiving an up-DR request (step S1), the control device 200 may predict the probability of receiving an up-DR request, the amount of power requested by the up-DR request, and the DR control time period, and if the probability of receiving an up-DR request is higher than a threshold, it may create one or more candidates for the first schedule D2 (step S2).

[0129] The control device 200 determines that it will accept the power increase DR request (step S8), and if it actually receives the power increase DR request, it transmits information to the aggregator 90 indicating that it will accept the power increase DR request and the amount of power that can be accepted, etc., if the amount of power requested by the power increase DR request and the DR control time period are within the predicted range (step S9).

[0130] The control device 200 determines that it will not accept the power increase DR request (step S11), and if it actually receives a power increase DR request, it transmits information to the aggregator 90 indicating that it will not accept the power increase DR request, etc., if the amount of power requested by the power increase DR request and the DR control time period are within the predicted range (step S12).

[0131] (5-2) Variation 1B In this embodiment, the creation unit 493 determined whether or not user judgment was required to create the first schedule D2 based on whether or not user equipment was used. However, the creation unit 493 may also determine whether or not user judgment was required to create the first schedule D2 based on the amount of power requested by the DR request.

[0132] For example, the creation unit 493 determines that if the amount of power requested by the DR request is greater than the threshold, a user decision is required to create the first schedule D2.

[0133] (5-3) Modification 1C In this embodiment, after creating one or more candidates for the first schedule D2 (step S2), the creation unit 493 determined whether or not user judgment was required to create the first schedule D2 based on whether or not user equipment was used (step S3). However, the control unit 49 may, without determining whether or not user judgment was required, prioritize selecting from among the multiple candidates for the first schedule D2 that do not utilize user equipment. The control unit 49 may, without determining whether or not user judgment was required, prioritize selecting from among the multiple candidates for the first schedule D2 that have a high power consumption of the water heater 100. The control unit 49 may, without determining whether or not user judgment was required, prioritize selecting from among the multiple candidates for the first schedule D2 that have low charges, including electricity and water charges.

[0134] In this case, the control unit 49, for example, creates a first schedule D2 based on the selected candidate and determines to accept the request for an upgraded DR.

[0135] (5-4) While embodiments of this disclosure have been described above, it should be understood that various modifications to the form and details are possible without departing from the spirit and scope of this disclosure as described in the claims. [Explanation of Symbols]

[0136] 49 Control Unit 90 Aggregators 98 Buildings 100 Hot water supply system 130a Display Unit (Output Unit) 130b Control Unit (Input Unit) 200 control devices, computers D2 1st Schedule [Prior art documents] [Patent Documents]

[0137] [Patent Document 1] Japanese Patent Publication No. 2018-170925

Claims

1. A control device (200) for controlling a heat pump type hot water supply system (100) having a tank, installed in a building (98), It includes a control unit (49), The control unit, As a demand response request, the aggregator (90) receives a first request to increase the amount of electricity consumed in the building during the first time period compared to when no such request has been received. To cause the hot water supply system to perform a heating operation during the first time period, by executing a first event that consumes the hot water in the tank, which is expected to occur after the first time period, by the end of the first time period, or To increase the amount of hot water stored compared to when the aforementioned request has not been received, and to cause the hot water supply device to perform a boiling operation during the first time period, To create a first schedule (D2) to respond to the first request, including the following: Control device (200).

2. The control unit determines whether or not user equipment is to be used, or the amount of power requested by the first request, whether or not a user decision is required to create the first schedule. The control device (200) according to claim 1.

3. If the control unit determines that a decision by the user is necessary, One or more candidates for the first schedule are output to the output unit (130a), The first schedule is created using a specific candidate selected using the input unit (130b). The control device (200) according to claim 2.

4. If the control unit determines that a decision by the user is necessary, it outputs information to the output unit (130a) asking whether or not to accept the first request. The control device (200) according to claim 2.

5. If the control unit determines that a user decision is not required, it will create the first schedule using a specific candidate selected from one or more candidates for the first schedule based on predetermined conditions. The control device (200) according to claim 2.

6. The control unit causes the hot water supply device to heat up an amount of water greater than or equal to the amount of water consumed by executing the first event, by performing a heating operation. A control device (200) according to any one of claims 1 to 5.

7. The control unit cancels the boiling operation of the hot water supply system that was scheduled outside of the first time period. A control device (200) according to any one of claims 1 to 5.

8. If the control unit determines that preparation of user equipment is necessary to execute the first event, it outputs a notification to the output unit (130a) requesting the preparation of user equipment before executing the first event. A control device (200) according to any one of claims 1 to 5.

9. The control unit shall, before executing the first event, cancel the execution of the first event if the user equipment for executing the first event is not ready. A control device (200) according to any one of claims 1 to 5.

10. The control unit, From among the multiple candidates for the first schedule, select the candidate that does not utilize user equipment as the priority. Based on the selected candidates, the first schedule is created. A control device (200) according to any one of claims 1 to 5.

11. The control unit, From among the multiple candidates for the first schedule, the candidate with the highest power consumption of the hot water heater is selected first. Based on the selected candidates, the first schedule is created. A control device (200) according to any one of claims 1 to 5.

12. The control unit, From among the multiple options in the first schedule mentioned above, the option with the lowest price will be selected first. Based on the selected candidates, the first schedule is created. A control device (200) according to any one of claims 1 to 5.

13. A control method performed by a computer (200) for controlling a heat pump type hot water supply system (100) having a tank (21) installed in a building (98), The computer includes a control unit (49), The control unit, As a demand response request, the aggregator (90) receives a first request to increase the amount of electricity consumed in the building during the first time period compared to when no such request has been received. To cause the hot water supply system to perform a heating operation during the first time period, by executing a first event that consumes the hot water in the tank, which is expected to occur after the first time period, by the end of the first time period, or To increase the amount of hot water stored compared to when the aforementioned request has not been received, and to cause the hot water supply device to perform a boiling operation during the first time period, To create a first schedule (D2) to respond to the first request, including the following: Control method.

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