JP6650279B2 - Hot water supply system - Google Patents

Description

  The technology disclosed in this specification relates to a hot water supply system.

  Patent Document 1 discloses a hot water supply system including a heat pump heat source that consumes electric power to heat a heat medium, a tank that stores the heat medium heated by the heat pump heat source, and a display unit that displays information to a user. Is disclosed. The control device is configured to be able to perform a boiling operation in which the heat pump heat source is driven and the heat medium heated by the heat pump heat source is stored in the tank. The control device calculates the amount of power consumed in the boiling operation, and displays the calculated amount of power on the display unit.

JP 2007-178059 A

  Generally, the power supply source for the hot water supply system is a commercial power supply. Further, as a power supply source to the hot water supply system, for example, there is a hot water supply system including a storage battery in case power supply from a commercial power supply is stopped. Note that devices other than the hot water supply system, such as a television, a refrigerator, and lighting are also connected to the storage battery. Hereinafter, the state in which the power supply source is the storage battery is referred to as storage battery operation. When the supply of power from the commercial power supply is stopped, it is impossible to predict the time until the commercial power supply is restored. When the supply of power from the commercial power supply is stopped, the storage battery cannot be charged. Therefore, the user needs to effectively utilize the amount of power stored in the storage battery between the hot water supply system and devices other than the hot water supply system.

  The boiling operation performed by the hot water supply system consumes a relatively large amount of electric power. Therefore, for example, if the boiling operation is performed when the amount of power remaining in the storage battery is low, the operation of devices other than the hot water supply system may be stopped. In order to avoid such a situation, it is preferable that the user be able to know in advance the amount of power consumed in the boiling operation during the operation corresponding to the storage battery. If the user can know the amount of power consumed in the boiling operation in advance, the heating operation is performed after comparing the amount of power stored in the storage battery with the amount of power consumed in the boiling operation. It is possible to determine whether or not to do so.

  The present specification proposes a hot water supply system capable of notifying a user in advance of a predicted amount of power consumed in a boiling operation during a storage battery-compatible operation.

The hot water supply system disclosed in this specification operates by being supplied with power from a commercial power system or a storage battery. The hot water supply system includes a heat pump heat source that consumes electric power to heat the heat medium, a tank that stores the heat medium heated by the heat pump heat source, a display unit that displays information to a user, and an operation unit. ing. The control device can switch between a normal operation that operates by supplying power from a commercial power system and a storage battery-compatible operation that operates by supplying power from a storage battery. The control device is configured to be able to execute a boiling operation in which the heat pump heat source is driven and the heat medium heated by the heat pump heat source is stored in the tank. The user can adjust the heating amount of the heat medium in the boiling operation by operating the operation unit. The control device is configured to predict , according to the heating amount of the heat medium instructed by the user, that the heating operation be performed when the user performs an operation for performing the boiling operation during the storage battery operation. The power amount is calculated, and the calculated predicted power amount is displayed on the display unit.

According to the above configuration, during the storage battery-compatible operation, the user can know in advance the predicted power amount corresponding to the heating amount of the heat medium specified by the user . Thus, the user can, for example, compare in advance the amount of power stored in the storage battery with the predicted amount of power consumed in the boiling operation. As a result, during the storage battery operation, the user can appropriately determine whether or not the hot water supply system may perform the boiling operation.

The figure which represents typically the structure of the hot-water supply system 2 which concerns on an Example. 4 is a table showing the boiling capacity of the heat pump heat source and the operation rate of the heat pump heat source during the operation corresponding to the storage battery. 7 is a table showing the boiling efficiency of the heat pump heat source and the average power of the plurality of heaters 35 during the operation corresponding to the storage battery. 9 is a flowchart showing a process during a storage battery operation. 5 is a flowchart showing a process for calculating a predicted boiling operation completion time during a battery-compatible operation. 9 is a flowchart illustrating a predicted electric energy calculation process during storage battery operation. The figure which shows an example of the screen displayed on the display part 77, when it is judged that the fuel gas is not supplied to the burner 80 during the storage battery operation. The figure which shows an example of the screen which displays the completion completion time TE and the predicted electric energy Wh1 on the display part 77 during the storage battery operation. The figure which shows an example of the screen which displays the message of whether to reduce the boiling water amount on the display part 77 during operation with a storage battery. The figure which shows an example of the screen displayed on the display part 77, when the boiling operation is completed during the storage battery operation.

  The main features of the embodiment described below are listed. The technical elements described below are independent technical elements, each exhibiting technical utility independently or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Absent.

(Characteristic 1) The control device, based on the electric energy of the heat pump heat source consumed in the boiling operation and the electric energy of devices other than the heat pump heat source consumed in the boiling operation, during the operation corresponding to the storage battery. The predicted electric energy consumed in the upper operation may be calculated. The control device may calculate the electric energy of devices other than the heat pump heat source consumed in the boiling operation based on the predicted boiling operation completion time of the boiling operation during the storage battery operation.

  In the hot water supply system during the boiling operation, a heat pump heat source and devices other than the heat pump heat source are operating. The electric energy of the devices other than the heat pump heat source consumed in the boiling operation can be calculated based on the power consumption of the devices other than the heat pump heat source during the boiling operation and the time required for the boiling operation. According to the above configuration, it is possible to calculate the electric energy of the devices other than the heat pump heat source consumed in the boiling operation using the power consumption of the devices other than the heat pump heat source during the boiling operation and the predicted heating completion time. it can. Thus, the accuracy of the predicted electric energy of the hot water supply system consumed in the boiling operation can be improved.

(Feature 2) The hot water supply system further includes a heater provided in a path through which the heat medium flows, and the control device is configured to execute a freeze prevention operation of preventing the heat medium from being frozen by heating the heater. It may be. In this case, during the operation corresponding to the storage battery, if the anti-freezing operation is performed before the completion of the boiling operation, the predicted power amount consumed in the boiling operation is changed to the predicted electric energy consumed in the boiling operation. It is preferable to include the electric energy of the heater.

  During the operation corresponding to the storage battery, the anti-freezing operation may be performed before the boiling operation is completed. In this case, electric power is consumed by heating the heater until the boiling operation is completed. According to the above configuration, during the operation corresponding to the storage battery, the electric power consumed in the boiling operation can include the electric power of the heater until the completion of the boiling operation. Thereby, the accuracy of the predicted electric energy of the hot water supply system consumed in the boiling operation can be improved.

Another hot water supply system disclosed in this specification operates by being supplied with power from a commercial power system or a storage battery. The hot water supply system includes a heat pump heat source that consumes electric power to heat the heat medium, a tank that stores the heat medium heated by the heat pump heat source, a heater provided in a path through which the heat medium flows, and information to the user. A display unit for displaying. The control device can switch between a normal operation that operates by supplying power from a commercial power system and a storage battery-compatible operation that operates by supplying power from a storage battery. The controller can perform a boiling operation in which the heat pump heat source is driven to store the heat medium heated by the heat pump heat source in the tank, and an antifreeze operation in which the heater is heated to prevent the heat medium from freezing. Is configured. The control device is configured such that, when the user performs an operation for performing the boiling operation during the operation corresponding to the storage battery, the power amount of the heat pump heat source consumed in the heating operation and the heat pump consumed in the heating operation. Based on the power amounts of the devices other than the heat source, a predicted power amount consumed in the boiling operation is calculated, and the calculated predicted power amount is displayed on the display unit. The controller calculates the amount of power consumed by the device other than the heat pump heat source in the boiling operation based on the predicted boiling operation completion time of the boiling operation during the operation corresponding to the storage battery. If the anti-freezing operation is performed before the boiling operation is completed, the predicted electric energy consumed in the boiling operation includes the electric energy of the heater until the boiling operation is completed. According to the above configuration, according to the above configuration, the user can know in advance the predicted amount of power consumed in the boiling operation during the operation corresponding to the storage battery. Thus, the user can, for example, compare in advance the amount of power stored in the storage battery with the predicted amount of power consumed in the boiling operation. As a result, during the storage battery operation, the user can appropriately determine whether or not the hot water supply system may perform the boiling operation. In addition, the power consumption of the devices other than the heat pump heat source consumed in the boiling operation can be calculated using the power consumption of the devices other than the heat pump heat source during the boiling operation and the predicted heating operation completion time. Thus, the accuracy of the predicted electric energy of the hot water supply system consumed in the boiling operation can be improved. Further, during the operation corresponding to the storage battery, the electric power consumed in the boiling operation can include the electric energy of the heater until the completion of the boiling operation. Thereby, the accuracy of the predicted electric energy of the hot water supply system consumed in the boiling operation can be improved.

(Characteristic 3) The control device specifies the boiling efficiency of the heat pump heat source based on the outside air temperature during the operation corresponding to the storage battery, and calculates the predicted electric energy consumed in the boiling operation based on the specified boiling efficiency. It may be calculated.
If the outside air temperature is different, the boiling efficiency of the heat pump heat source will be different even if the power consumption of the heat pump heat source is the same. When the boiling efficiency of the heat pump heat source differs, the amount of power consumed by the heat pump heat source until the boiling operation is completed also differs. According to the above configuration, the boiling efficiency of the heat pump heat source can be specified based on the outside air temperature. Thereby, the accuracy of the predicted electric energy of the heat pump heat source consumed in the boiling operation can be improved.

(Characteristic 4) The control device is configured to perform the control such that the sum of the power consumption of the heat pump heat source during the heating operation and the power consumption of the devices other than the heat pump heat source during the heating operation is equal to or less than the suppression power during the storage battery operation. The power consumption of the heat pump heat source during the upper operation may be controlled. In this case, the control device specifies the boiling efficiency of the heat pump heat source based on the power consumption of the heat pump heat source during the boiling operation during the operation corresponding to the storage battery, and determines the boiling efficiency based on the specified boiling efficiency of the heat pump heat source. It is preferable to calculate a predicted amount of power consumed in the upper operation.

  If the power consumption of the heat pump heat source differs, the boiling efficiency of the heat pump heat source also differs. When the boiling efficiency of the heat pump heat source differs, the amount of power consumed by the heat pump heat source until the boiling operation is completed also differs. According to the above configuration, during the operation corresponding to the storage battery, the boiling efficiency of the heat pump heat source can be specified based on the power consumption of the heat pump heat source during the boiling operation. Thereby, the accuracy of the predicted electric energy of the heat pump heat source consumed in the boiling operation can be improved.

(Characteristic 5) During the operation corresponding to the storage battery, when the anti-freezing operation is performed until the boiling operation is completed, the control device performs the heating based on the operation rate of the heat pump heat source until the completion of the boiling operation. The operation completion prediction time may be calculated.

  In the anti-freezing operation, the control device drives the heater intermittently. If the freezing prevention operation is performed before the boiling operation is completed during the storage battery operation, the power consumption of the hot water supply system may exceed the suppressed power. In order to avoid such a situation, the control device stops the operation of the heat pump heat source when the heater is being driven when the anti-freezing operation is performed until the boiling operation is completed, and turns off the heater. The heat pump heat source may be operated when not being driven. In this case, the operation rate of the heat pump heat source varies depending on the ratio of the time for driving the heater and the time for not driving the heater. As the operating rate of the heat pump heat source decreases, the time required to complete the boiling operation increases. According to the above configuration, the controller can calculate the predicted boiling operation completion time based on the operation rate of the heat pump heat source until the completion of the boiling operation. The operating rate of the heat pump heat source until the completion of the heating operation is a ratio of the time during which the heat pump heat source is operating to the time during the heating operation when the antifreezing operation is performed. Prediction of the completion of the boiling operation when the anti-freezing operation is performed until the completion of the boiling operation by calculating the predicted time of the completion of the boiling operation based on the operation rate of the heat pump heat source until the completion of the boiling operation. Time accuracy can be improved.

(Characteristic 6) Even when the control device specifies the boiling capacity of the heat pump heat source based on the outside air temperature during the operation corresponding to the storage battery, and calculates the predicted boiling operation completion time based on the specified boiling capacity. Good.

  If the outside air temperature is different, the boiling capacity of the heat pump heat source will be different even if the power consumption of the heat pump heat source is the same. If the heat pump heat sources have different boiling capabilities, the time required to complete the boiling operation will also be different. According to the above configuration, the boiling capacity of the heat pump heat source can be specified based on the outside air temperature. Thus, the accuracy of the predicted boiling operation completion time can be improved.

(Characteristic 7) The control device is configured to control the boiling power so that the sum of the power consumption of the heat pump heat source during the heating operation and the power consumption of the devices other than the heat pump heat source during the heating operation is equal to or less than the suppression power during the storage battery operation. The power consumption of the heat pump heat source during the upper operation may be controlled. In this case, the control device specifies the boiling capacity of the heat pump heat source during the operation corresponding to the storage battery based on the power consumption of the heat pump heat source during the boiling operation, and determines the boiling capacity based on the specified boiling capability of the heat pump heat source. It is preferable to calculate a predicted upper operation completion time.

  During the operation corresponding to the storage battery, the power consumption of the hot water supply system may need to be suppressed to the suppressed power or less. In this case, during the operation corresponding to the storage battery, the power consumption during the boiling operation is determined by the suppressed power and the power consumption of devices other than the heat pump heat source during the boiling operation. If the power consumption of the heat pump heat source during the boiling operation is different, the boiling capability of the heat pump heat source is different. If the heat pump heat sources have different boiling capabilities, the time required to complete the boiling operation will also be different. According to the above configuration, during the storage battery operation, the boiling capability of the heat pump heat source can be specified based on the power consumption that can be used by the heat pump heat source during the boiling operation. Thereby, the accuracy of the predicted boiling operation completion time when the power consumption of the heat pump heat source during the boiling operation is suppressed can be improved.

(Wherein 8) hot water system, the heating amount of the heating medium in the heating-up operation, that have a user adjustable operating unit. The control device, during the storage battery corresponding operation, based on the heating amount of the heating medium which is instructed by the user, we calculate the predicted amount of power consumed by the heating-up operation.

  According to the above configuration, the user can know the predicted electric energy according to the heating amount of the heat medium specified by the user. As a result, during the storage battery operation, the user can appropriately determine whether or not the hot water supply system may perform the boiling operation.

(Example)
As shown in FIG. 1, the hot water supply system 2 according to the present embodiment includes an HP (heat pump) unit 4, a tank unit 6, and a burner unit 8.

  The HP unit 4 is a heat source that heats water by absorbing heat from the outside air. The HP unit 4 includes a compressor 10, a condenser 12, an expansion valve 14, and an evaporator 16. The HP unit 4 heats water by absorbing heat from outside air by circulating a refrigerant (for example, a CFC-based refrigerant) in the order of the compressor 10, the condenser 12, the expansion valve 14, and the evaporator 16. The compressor 10 pressurizes the refrigerant to a high temperature and a high pressure. The condenser 12 cools the refrigerant by heat exchange with water. An HP going path 19 and an HP returning path 21 are connected to both ends of the water flow path of the condenser 12, respectively. The expansion valve 14 reduces the pressure of the refrigerant to a low temperature and a low pressure. The evaporator 16 heats the refrigerant by heat exchange with the outside air. The HP unit 4 further includes a circulation pump 18 for circulating water through the condenser 12, a going thermistor 20 for detecting the temperature of water flowing into the condenser 12, and a return thermistor 22 for detecting the temperature of water flowing out of the condenser 12. , An HP controller 24 for controlling the operation of each component of the HP unit 4. Hereinafter, the compressor 10, the condenser 12, the expansion valve 14, and the evaporator 16 are collectively referred to as a “heat pump heat source”.

  The tank unit 6 includes a tank 30, a mixing valve 32, a bypass control valve 34, and a tank outside air temperature thermistor 39 for detecting an outside air temperature TO. The tank 30 is a closed container whose outside is covered with a heat insulating material and stores water inside. The capacity of the tank 30 of this embodiment is, for example, 100 liters. When the circulation pump 18 of the HP unit 4 is driven, water at the bottom of the tank 30 is sent to the condenser 12 via the tank going path 31 and the HP going path 19. The water heated by the condenser 12 and having a high temperature is returned into the tank 30 from the top of the tank 30 via the HP return path 21 and the tank return path 33. A heater 35 that consumes electric power to heat the water in the tank going path 31 and the tank returning path 33 is attached to the tank going path 31 and the tank returning path 33. When the water heated by the HP unit 4 flows into the tank 30, a temperature stratification in which a high-temperature water layer is stacked on a low-temperature water layer is formed inside the tank 30. The thermistors 36a, 36b, 36c, 36d, and 36e are attached to the tank 30 at predetermined intervals in the height direction of the tank 30. Each thermistor 36a, 36b, 36c, 36d, 36e measures the temperature of the water at its mounting position. In this embodiment, the thermistor 36a is disposed at a position 6 liters below the top of the tank 30, the thermistor 36b is disposed at a position 6 liters below the thermistor 36a, and the thermistor 36c is 18 liters below the thermistor 36b. The thermistor 36d is disposed at a position 20 liters below the thermistor 36c, and the thermistor 36e is disposed at a position 20 liters below the thermistor 36d. Hereinafter, a state in which the inside of the tank 30 is filled with the high-temperature water heated by the HP unit 4 is referred to as a “full state”.

  Tap water is supplied to the tank unit 6 via a water supply path 40. The water supply path 40 is provided with a pressure reducing valve 42 for reducing the supply water pressure, a water input thermistor 44 for detecting the supply water temperature, and a heater 35 for consuming power and heating the water in the water supply path 40. The water supply path 40 branches into a tank water supply path 46 communicating with the bottom of the tank 30 and a tank bypass path 48 communicating with the mixing valve 32. Check valves 50 and 52 are attached to the tank water supply path 46 and the tank bypass path 48, respectively. A heater 35 that consumes electric power and heats the water in the tank water supply path 46 is attached to the tank water supply path 46. The tank bypass path 48 is provided with a water-side water amount sensor 54 for detecting the flow rate of tap water flowing into the mixing valve 32, and a heater 35 for consuming power and heating the water in the tank bypass path 48. The top of the tank 30 and the mixing valve 32 communicate with each other via a tank tapping path 56. A check valve 58, a heater 35 that consumes electric power to heat water in the tank tapping path 56, and a hot water side that detects a flow rate of water from the tank 30 flowing into the mixing valve 32 are provided in the tank tapping path 56. A water sensor 60 is attached.

  The mixing valve 32 mixes the tap water flowing from the tank bypass path 48 and the water from the tank 30 flowing from the tank tapping path 56 and sends out the mixed water to the first hot water supply path 62. The mixing valve 32 is driven by a stepping motor to adjust the opening on the tank bypass path 48 (opening on the water side) and the opening on the tank tapping path 56 (opening on the hot water side). A mixing thermistor 64 for detecting the temperature of water sent from the mixing valve 32 is attached to the first hot water supply path 62. In the first hot water supply path 62, heaters 35 that consume power and heat the water in the first hot water supply path 62 are provided upstream and downstream of a connection between the first hot water supply path 62 and the hot water supply bypass path 72. Is installed.

  From the tank unit 6, hot water is supplied to a hot water supply point such as a kitchen, a shower, or a curan via a second hot water supply path 66. The second hot water supply path 66 is provided with a hot water supply outlet thermistor 68 for detecting the temperature of water supplied to the hot water supply point, and a check valve 70. In the second hot water supply path 66, heaters 35 that consume power and heat the water in the second hot water supply path 66 are provided upstream and downstream of a connection portion between the second hot water supply path 66 and the hot water supply bypass path 72. Is installed. The first hot water supply path 62 and the second hot water supply path 66 are connected by a hot water supply bypass path 72. The hot water supply bypass path 72 is provided with a bypass control valve 34 and a heater 35 for consuming power and heating the water in the hot water supply bypass path 72.

  The tank unit 6 further includes a tank controller 74 and a remote controller 76 capable of communicating with the tank controller 74. The tank controller 74 controls the operation of each component of the tank unit 6. The tank controller 74 includes a nonvolatile memory 75. The non-volatile memory 75 stores a first table 132 (see FIG. 2) and a second table 142 (see FIG. 3). The tables 132 and 142 will be described later in detail. The remote controller 76 includes a display unit 77 and an operation unit 78. Display unit 77 displays various information of hot water supply system 2 to the user. The various information includes, for example, a power supply source, a fuel gas supply status, a predicted completion time TE described later, and a predicted power amount Wh1 described later. The operation unit 78 includes switch units 78a and 78b. The user can input various instructions via the operation unit 78. The various instructions input by the user are, for example, the start of the boiling operation.

  The burner unit 8 includes a burner 80, a heat exchanger 82, a bypass servo 84, a water amount servo 86, and a hot water valve 88. The burner 80 is an auxiliary heat source device that heats water flowing through the heat exchanger 82 by burning fuel gas. Fuel gas is supplied to the burner 80 via a gas supply pipe 81. Further, combustion air is sent into the burner 80 via an air supply pipe 83. In the vicinity of the burner 80, an igniter 85 for igniting the burner 80 and a frame rod 87 for detecting a combustion state of the burner 80 are provided. Water from the first hot water supply path 62 of the tank unit 6 flows into the heat exchanger 82 via the burner outward path 90. The water that has passed through the heat exchanger 82 flows out through the burner return path 92 to the second hot water supply path 66 of the tank unit 6. A water amount servo 86 for adjusting the flow rate of water flowing through the burner outward path 90 and a water amount sensor 91 for detecting the flow rate of water flowing through the burner outward path 90 are attached to the burner outward path 90. The burner outward path 90 and the burner return path 92 communicate with each other via a burner bypass path 94. A bypass servo 84 is attached to a connection between the burner outward path 90 and the burner bypass path 94. The bypass servo 84 adjusts the flow rate of water flowing from the burner outward path 90 to the burner bypass path 94. A burner hot water supply thermistor 96 for detecting the temperature of water flowing out of the heat exchanger 82 is attached to the burner return path 92. A hot water path 98 branches off from the burner return path 92. A hot water valve 88 is attached to the hot water path 98. From the burner unit 8, hot water is supplied to a bathtub as a hot water supply point via a hot water path 98. The burner unit 8 further includes a burner controller 100 that controls the operation of each component of the burner unit 8.

  Electric power is supplied from a power supply unit 9 to the HP unit 4, the tank unit 6, and the burner unit 8 of the hot water supply system 2. The power supply unit 9 includes a storage battery 104 and a storage battery distribution panel 108. The storage battery distribution panel 108 is connected to the commercial power supply 102 via the distribution panel 106. Note that a general load 110 is also connected to the distribution board 106. The general load is, for example, an air conditioner, a washing machine, a microwave oven, or the like. The storage battery 104, the important load 112, the HP unit 4, the tank unit 6, and the burner unit 8 are also connected to the storage battery distribution panel 108. The storage battery 104 is a secondary battery such as a lithium ion secondary battery. The important load 112 is, for example, a television, a refrigerator, lighting, and the like. When electric power is supplied from the commercial power supply 102, the electric power from the commercial power supply 102 is supplied to the general load 110 via the distribution board 106. The electric power from the commercial power supply 102 is supplied to the important load 112, the storage battery 104, the HP unit 4, the tank unit 6, and the burner unit 8 via the distribution board 106 and the storage battery distribution board 108. When electric power is supplied from the commercial power supply 102 to the storage battery 104, the storage battery 104 is charged. The storage battery 104 has a built-in protection circuit (not shown). When the discharged power exceeds the upper limit discharge power (for example, 720 W), the discharge from the storage battery 104 is stopped.

  When power is not supplied from the commercial power supply 102 due to, for example, a power failure, the storage battery 104 performs an independent operation. When the storage battery 104 performs the self-sustaining operation, the power from the storage battery 104 is supplied to the important load 112, the HP unit 4, the tank unit 6, and the burner unit 8 via the storage battery distribution panel 108, No power is supplied to the general load 110. When the supply of power from the commercial power supply 102 is stopped, it is not possible to predict a time until the commercial power supply 102 is restored. Further, when power is not supplied from the commercial power supply 102, the storage battery 104 cannot be charged. Therefore, when power is supplied from the storage battery 104, it is preferable that the time during which the hot water supply system 2 and the important load 112 can operate by supplying the power from the storage battery 104 is made as long as possible. For this purpose, it is necessary to effectively utilize the remaining power amount Wh2 of the storage battery 104 between the hot water supply system 2 and the important load 112. Hereinafter, the operation state of hot water supply system 2 when the power supply source is commercial power supply 102 is referred to as “normal operation”, and the operation state of hot water supply system 2 when the power supply source is storage battery 104 is “storage-compatible operation”. " In addition, during the operation corresponding to the storage battery, the hot water supply system 2 must operate at a suppressed power WS lower than the maximum power consumption during the normal operation. The suppression power WS can be set in advance, and different values are set depending on the capacity of the storage battery 104 provided in the power supply unit 9. In the present embodiment, the suppression power WS is set to 700W.

  The HP controller 24 and the tank controller 74 can communicate with each other. The tank controller 74 and the burner controller 100 can communicate with each other. Therefore, by controlling the HP controller 24, the tank controller 74, and the burner controller 100 in cooperation with each other, the hot water supply system 2 can perform various operations such as an antifreeze operation, a boiling operation, and a hot water supply operation. Hereinafter, the HP controller 24, the tank controller 74, and the burner controller 100 are collectively referred to simply as a controller.

  Next, the operation of the hot water supply system 2 will be described. Hot water supply system 2 can execute a freezing prevention operation, a boiling operation, and a hot water supply operation.

(Freezing prevention operation)
If a long time elapses without performing the boiling operation and the hot water supply operation in a state where the outside air temperature is low, water in each path may stay and freeze inside these pipes. If the water is frozen, the boiling operation and the hot water supply operation cannot be performed until the frozen water is melted. Therefore, when the outside air temperature TO is equal to or lower than the predetermined temperature, the hot water supply system 2 executes an antifreeze operation so that water in each path does not freeze.

  The tank controller 74 executes an antifreezing operation when the outside air temperature TO detected by the tank outside air temperature thermistor 39 is equal to or lower than a predetermined temperature (for example, 7 ° C.). In the anti-freezing operation, the tank controller 74 switches between driving and non-driving the plurality of heaters 35 in accordance with the predetermined cycle t1. The tank controller 74 drives the plurality of heaters 35 to heat the flow path of the water in the tank unit 6 to prevent the water from freezing inside these pipes. The drive time t2 of the plurality of heaters 35 and the non-drive time t3 of the plurality of heaters 35 in the predetermined cycle t1 are determined based on the outside air temperature TO. In the following, in the freeze prevention operation, the case where the plurality of heaters 35 are driven is referred to as “heater driving operation”, and the case where the plurality of heaters 35 is not driven (not driven) is referred to as “heater non-driving operation”.

(Boiling operation)
In the boiling operation, the hot water supply system 2 drives the HP unit 4 to heat the water in the tank 30. When the boiling operation is started, the HP controller 24 drives the compressor 10 to circulate the refrigerant in the order of the compressor 10, the condenser 12, the expansion valve 14, and the evaporator 16, and also drives the circulation pump 18. Then, water is circulated between the tank 30 and the condenser 12. As a result, the water sucked from the bottom of the tank 30 is heated to the boiling temperature TA (for example, 42 ° C.) in the condenser 12 and returned to the top of the tank 30. When the boiling water amount TW of the water in the tank 30 is replaced with the water heated to the boiling temperature TA, the HP controller 24 ends the boiling operation. The boiling water amount TW is the amount of water heated to the boiling temperature TA by the boiling operation. During the normal operation, the boiling operation may be executed based on a preset start timing, or may be executed based on a user instruction input to the remote controller 76. The preset start timing is, for example, a time period during which cheap midnight power can be used. On the other hand, during the operation corresponding to the storage battery, the boiling operation is executed only based on a user instruction input to the remote controller 76. In addition, when the suppression power WS is 700 W during the operation corresponding to the storage battery, if the boiling operation and the anti-freezing operation (specifically, the heater driving operation) are simultaneously performed, the power consumption W1 of the hot water supply system 2 is reduced to the suppression power WS. Will be exceeded. For this reason, in the present embodiment, when the boiling operation and the anti-freezing operation are simultaneously performed in the storage battery operation, the heat pump heat source is operated during the heater non-drive operation, and the operation of the heat pump heat source is stopped during the heater drive operation. Let me.

(Hot water supply operation)
In the hot water supply operation, water at a set hot water supply temperature is supplied to a hot water supply location. The controller determines that the flow rate (also referred to as hot water supply flow rate) obtained by adding the flow rate detected by the water-side water flow rate sensor 54 and the flow rate detected by the hot-water flow rate sensor 60 is equal to or higher than the minimum operating flow rate (for example, 2.4 L / min). Then, it is determined that the hot water supply has been started by opening the hot water supply point or filling the bathtub with hot water. Then, the controller executes the following non-combustion hot water supply operation or combustion hot water supply operation according to the temperature detected by the thermistor 36a.

  When the temperature detected by the thermistor 36a is equal to or higher than the hot water supply set temperature, the controller executes the non-combustion hot water supply operation. In the non-burning hot water supply operation, the controller prohibits the combustion operation of the burner 80 and adjusts the opening of the mixing valve 32 such that the temperature detected by the mixing thermistor 64 becomes the hot water supply set temperature. Thereby, water whose temperature has been adjusted to the hot water supply set temperature is supplied to the hot water supply point.

  When the temperature detected by the thermistor 36a is lower than the hot water supply set temperature, the controller executes the hot water supply operation. In the combustion hot water supply operation, the controller permits the combustion operation of the burner 80, and sets the temperature detected by the mixing thermistor 64 to be lower than the hot water supply set temperature by the minimum boiling capacity of the burner 80. The opening of the mixing valve 32 is adjusted. In this case, the high-temperature water supplied from the upper portion of the tank 30 and the low-temperature water supplied from the water supply path 40 are mixed in the mixing valve 32, and then heated to the hot water supply set temperature by the burner 80. Supplied to

  If the hot water supply flow rate falls below the minimum operation flow rate during the above-described non-combustion hot water supply operation or combustion hot water supply operation, the controller determines that hot water supply has ended due to closure of the hot water supply location or termination of hot water supply to the bathtub. Then, the hot water supply operation ends.

  Next, the first table 132 stored in the nonvolatile memory 75 will be described with reference to FIG. The first table 132 includes an outside air temperature area 134, a boiling capacity area 136, and an HP operation rate area 138. The outside air temperature region 134 is divided for each outside air temperature TO. The first region 134a (outside air temperature TO> 7 ° C.) is a region in which the antifreeze operation is not performed. On the other hand, the second region 134b (2 ° C. ≦ outside air temperature TO ≦ 7 ° C.) and the third region 134c (outside air temperature TO <2 ° C.) are regions where the antifreeze operation is performed. In the second region 134b and the third region 134c, the predetermined period t1 is the same, but the drive time t2 of the plurality of heaters 35 and the non-drive time t3 of the plurality of heaters 35 are different. The drive time t2 of the second area 134b is set shorter than the drive time t2 of the third area 134c.

  The boiling capacity area 136 includes a first boiling capacity area 136a and a second boiling capacity area 136b. In the first boiling capacity area 136a, the boiling capacity H corresponding to the power consumption W2 of the heat pump heat source when the suppression power WS during the operation corresponding to the storage battery is 700W is stored. If the outside air temperature TO is different, the boiling capacity H is different even if the power consumption W2 is the same. For this reason, the first boiling capacity region 136a is divided for each outside air temperature TO in the outside air temperature region 134. The boiling capacity H of the heat pump heat source is an output of the heat pump heat source when the heat pump heat source is operated with power consumption W2. In the present embodiment, the power consumption W2 of the heat pump heat source is specified in advance based on the suppression power WS and the previously specified power consumption W3 of the circulation pump 18 and the controller during the boiling operation. Specifically, power consumption W2 is specified in advance by subtracting power consumption W3 from suppression power WS. This is because the heat pump heat source, the circulation pump 18 and the controller operate simultaneously during the boiling operation. In the second boiling capacity area 136b, the boiling capacity H corresponding to the power consumption W2 of the heat pump heat source when the suppression power WS during the operation corresponding to the storage battery is 1000W is stored. Similarly to the first boiling capacity area 136a, the second boiling capacity area 136b is also divided for each outside air temperature TO in the outside air temperature area 134.

  The HP availability ratio area 138 includes a first HP availability ratio area 138a and a second HP availability rate area 138b. In the first HP operation rate area 138a, an operation rate R corresponding to the case where the suppressed power WS during the operation corresponding to the storage battery is 700W is stored. The operation rate R is the ratio of the time during which the heat pump heat source is operating to the time during the boiling operation during the storage battery operation. As described above, when the suppression power WS is set to 700 W, the heat pump heat source is operated during the heater non-drive operation, and the operation of the heat pump heat source is stopped during the heater drive operation. Therefore, during the predetermined period t1, the non-driving time t3 of the plurality of heaters 35 is the operation time of the heat pump heat source. For this reason, the operating rate R of the heat pump heat source can be obtained by subtracting the non-driving time t3 in the predetermined cycle t1 and dividing by the predetermined cycle t1. For example, when the predetermined period t1 is 100 minutes, the driving time t2 is 20 minutes, and the non-driving time t3 is 80 minutes, the operating rate R is 80%. If the outside air temperature TO is different, the drive time t2 and the non-drive time t3 are different. For this reason, the first HP operation rate region 138a is divided for each outside air temperature TO in the outside air temperature region 134. When the outside air temperature TO is equal to or higher than 7 ° C., the antifreezing operation is not performed, so that the operation rate R is 100%. The second HP operation rate area 138b stores the operation rate R of the heat pump heat source when the suppression power WS during the operation corresponding to the storage battery is 1000 W. When suppression power WS is 1000 W, power consumption W1 of hot water supply system 2 does not exceed suppression power WS even when the boiling operation and the heater driving operation are performed simultaneously. In this case, the controller continues driving the heat pump heat source even if the heater driving operation is performed during the boiling operation. Therefore, the operation rate R in the second HP operation rate area 138b is 100% regardless of the outside air temperature TO.

  Next, the second table 142 stored in the nonvolatile memory 75 will be described with reference to FIG. The second table 142 includes an outside air temperature range 144, a boiling efficiency range 146, and a heater average power range 148. The outside air temperature region 144 includes a first region 144a, a second region 144b, and a third region 144c, and the regions 144a, 144b, and 144c are the same as the regions 134a, 134b, and 134c of the first table 132, respectively. It is. The boiling efficiency region 146 includes a first boiling efficiency region 146a and a second boiling efficiency region 146b. In the first boiling efficiency area 146a, the boiling efficiency E corresponding to the power consumption W2 of the heat pump heat source when the suppression power WS during the operation corresponding to the storage battery is 700W is stored. If the outside air temperature TO is different, the boiling efficiency E is different. For this reason, the first boiling efficiency region 146a is divided for each outside air temperature TO in the outside air temperature region 144. The boiling efficiency E is the energy efficiency of the heat pump heat source. In the second boiling efficiency region 146b, the boiling efficiency E corresponding to the power consumption W2 of the heat pump heat source when the suppression power WS during the operation corresponding to the storage battery is 1000 W is stored. Similarly to the first boiling efficiency region 146a, the second boiling efficiency region 146b is also divided for each outside air temperature TO of the outside air temperature region 144.

  The heater average power area 148 stores the heater average power WA corresponding to the outside air temperature TO. The heater average power WA is obtained by averaging the power consumption W4 of the plurality of heaters 35 during the antifreezing operation. Specifically, the average heater power WA is calculated by multiplying the driving rates D of the plurality of heaters 35 during the anti-freezing operation by the power consumption W4 of the plurality of heaters 35 during the heater driving operation. The driving ratio D is a ratio occupied by the driving time t2 of the heater driving operation during the predetermined period t1 of the antifreezing operation. For example, when the predetermined cycle t1 is 100 minutes, the driving time t2 is 20 minutes, and the non-driving time t3 is 80 minutes, the driving rate D is 20%. The power consumption W4 of the plurality of heaters 35 during the heater driving operation is constant regardless of the outside air temperature TO.

(Processing during battery operation)
Next, the processing during the operation corresponding to the storage battery will be described with reference to FIGS. As described above, during the operation corresponding to the storage battery, the boiling operation is executed only based on a user's instruction. In this case, in one boiling operation, the user heats only the amount of water used in the hot water supply operation immediately after the boiling operation. Therefore, during the hot water supply operation performed after the hot water supply operation immediately after the boiling operation, the water heated by the heat pump heat source may not be stored in the tank 30 in some cases. The process of FIG. 4 is started, for example, when the user operates a hot water supply location.

  As shown in FIG. 4, in step S2, the controller determines whether or not fuel gas is being supplied to the burner 80. The controller opens the gas supply pipe 81 and the air supply pipe 83 in the burner 80, ignites with the igniter 85, and detects the supply of the fuel gas to the burner 80 using the frame rod 87. Specifically, when the ignition of the burner 80 can be detected by the frame rod 87, the controller determines that the fuel gas is being supplied to the burner 80.

  If fuel gas is being supplied to burner 80 (YES in step S2), the process proceeds to step S4. At the time of executing the processing in step S4, it is considered that the power supply is being performed from the storage battery 104 and the supply of the fuel gas from the gas supply pipe 81 is being performed normally. In this case, in step S4, the controller executes the combustion hot water supply priority operation. In the combustion hot water supply priority operation, the controller permits the hot water supply operation of the hot water supply system 2 and prohibits the non-combustion hot water supply operation of the hot water supply system 2. Thus, it is possible to suppress the occurrence of a situation in which the boiling operation must be performed during the storage battery operation, so that the amount of power consumed by the hot water supply system 2 can be suppressed.

  On the other hand, when the supply of the fuel gas to the burner 80 is not performed (NO in step S2), the process proceeds to step S6. At the time when the process of step S6 is executed, for example, a power failure occurs due to a disaster such as an earthquake, so that power is being supplied from the storage battery 104 and fuel gas is being normally supplied from the gas supply pipe 81. It is thought that there is no. Further, as described above, the water heated by the heat pump heat source may not be stored in the tank 30 in some cases. Therefore, in order to supply the heated water to the hot water supply point, it is necessary to store the water heated by the boiling operation in the tank 30. Therefore, in step S6, the controller notifies the user that the supply of the fuel gas is stopped and that the boiling operation needs to be performed. For example, as shown in FIG. 7, the controller causes the display unit 77 to display a message indicating that the supply of the fuel gas is stopped and whether the boiling operation may be performed. Thereby, the user can know that the supply of the fuel gas to the burner 80 is stopped. In addition, the user can know that in order to execute the hot water supply operation, it is necessary to consume the power of the storage battery 104 and execute the boiling operation. When performing the heating operation, the user operates the switch unit 78a, and when not performing the heating operation, the user operates the switch unit 78b. The remote controller 76 transmits a signal based on a user operation to the controller.

  As shown in FIG. 4, in step S8, the controller determines whether or not the user has given an instruction to perform the boiling operation. If the user has instructed to perform the boiling operation (YES in step S8), the process proceeds to step S10 (processing for calculating predicted boiling operation completion time). On the other hand, when the user instructs not to execute the boiling operation (NO in step S8), the controller ends the processing in FIG.

  With reference to FIG. 5, the boiling operation completion predicted time calculation processing will be described. In the boiling operation completion predicted time calculation process, the controller calculates the predicted boiling operation completion time TE. First, in step S32, the controller calculates a target boiling heat amount TH of the boiling operation. The controller calculates a target boiling heat amount TH based on the boiling water amount TW, the boiling temperature TA, and the temperature of the water in the tank 30. The temperature of the water in the tank 30 is detected by the thermistors 36a, 36b, 36c, 36d, 36e and the outgoing thermistor 20. The temperature of the water detected by the outgoing thermistor 20 is the same as the temperature of the water below the tank 30. In addition, when the process does not go through step S24 described later, the controller calculates the target boiling heat amount TH so that the tank 30 is fully charged. That is, the boiling water amount TW in this case is 100 liters.

  Next, in step S34, the controller specifies the boiling capacity H of the heat pump heat source. The controller specifies the boiling capacity H of the heat pump heat source based on the first table 132 (FIG. 2). Specifically, the controller specifies an appropriate boiling capacity H from the boiling capacity H stored in the first boiling capacity area 136a based on the outside air temperature TO.

  Next, in step S36, the controller specifies the operation rate R of the heat pump heat source. The controller specifies the operation rate R of the heat pump heat source based on the first table 132 (FIG. 2). Specifically, the controller specifies an appropriate operating rate R from the operating rates R stored in the first HP operating rate area 138a based on the outside air temperature TO.

  Next, in step S38, the controller calculates a predicted completion time TE. First, the controller divides the target boiling heat amount TH by the boiling capacity H specified in step S34 to calculate a first completion predicted time TE1. Further, the controller calculates the predicted completion time TE by dividing the first predicted completion time TE1 by the operating rate R. In addition, when the anti-freezing operation is not performed, or when the suppression power WS is 1000 W, the first predicted completion time TE1 is the same as the predicted completion time TE.

  As shown in FIG. 4, when step S10 (boiling operation completion predicted time calculation process) is completed, the process proceeds to step S12 (predicted power amount calculation process).

  With reference to FIG. 6, the predicted power amount calculation processing will be described. The predicted power amount calculation process is a process of calculating a predicted power amount Wh1 consumed by the hot water supply system 2 during the operation corresponding to the storage battery. First, in step S52, the controller specifies the boiling efficiency E of the heat pump heat source. The controller specifies the boiling efficiency E of the heat pump heat source based on the second table 142 (FIG. 3). Specifically, the controller specifies an appropriate boiling efficiency E from the boiling efficiency E stored in the first boiling efficiency area 146a based on the outside air temperature TO.

  Next, as shown in FIG. 6, in step S54, the controller calculates the electric energy Wh3 of the heat pump heat source consumed in the boiling operation. The controller calculates the electric energy Wh3 of the heat pump heat source consumed in the boiling operation by dividing the target boiling heat amount TH specified in step S32 by the boiling efficiency E specified in step S52.

  Next, in step S56, the controller specifies the power consumption W5 of the devices other than the heat pump heat source during the boiling operation. The equipment other than the heat pump heat source is the circulation pump 18, the controller, and the plurality of heaters 35. The power consumption W3 of the circulation pump 18 and the controller during the boiling operation is specified in advance. First, the controller specifies the heater average power WA of the heater 35 based on the second table 142. Specifically, the controller specifies an appropriate heater average power WA from the heater average powers WA stored in the heater average power area 148 based on the outside air temperature TO. Next, the controller specifies the power consumption W5 of devices other than the heat pump heat source during the boiling operation by adding the power consumption W3 specified in advance and the average heater power WA.

  Next, in step S58, the controller calculates the electric energy Wh4 of the devices other than the heat pump heat source consumed in the boiling operation. The controller multiplies the power consumption W5 of the devices other than the heat pump heat source by the predicted completion time TE calculated in the predicted boiling operation completion time calculation process, thereby obtaining the power of the devices other than the heat pump heat source consumed in the boiling operation. The amount Wh4 is calculated.

  Next, in step S60, the controller calculates the predicted power amount Wh1 of the hot water supply system 2 consumed in the boiling operation. The controller calculates the predicted power amount Wh1 of the hot water supply system 2 by adding the power amount Wh3 of the heat pump heat source and the power amount Wh4 of the devices other than the heat pump heat source.

  As shown in FIG. 4, when step S12 (the predicted power amount calculation process) is completed, the process proceeds to step S14. In step S14, the controller causes the display unit 77 to display the predicted completion time TE and the predicted power amount Wh1 (FIG. 8). Thereby, the user can confirm the predicted completion time TE and the predicted power amount Wh1. The user can determine whether or not to perform the boiling operation by comparing the remaining power amount Wh2 of the storage battery 104 with the predicted power amount Wh1. When performing the boiling operation, the user operates the switch unit 78a, and when stopping the boiling operation or changing the boiling water amount TW, the user operates the switch unit 78b. The remote controller 76 transmits a signal based on a user operation to the controller.

  Next, in step S16, the controller determines whether or not the user has issued an instruction to perform the boiling operation. If there is an instruction from the user to execute the boiling operation (YES in step S16), the process proceeds to step S18, and the controller executes the boiling operation. When the boiling operation of the target heating heat amount TH is completed by the boiling operation, the process proceeds to step S20. In step S20, the controller notifies the user that the boiling operation has been completed. As a method of notifying the user, the user is notified by voice and displayed on the display unit 77 (FIG. 10). Next, in step S22, the controller executes the non-combustion hot water supply priority operation. In the non-combustion hot water supply priority operation, the controller permits the non-combustion hot water supply operation of the hot water supply system 2 and prohibits the combustion hot water supply operation of the hot water supply system 2.

  On the other hand, when there is no instruction from the user to execute the boiling operation (NO in step S16), the process proceeds to step S24. In step S24, the controller checks with the user whether to reduce the boiling water amount TW. Specifically, the controller causes the display unit 77 to display a message for confirming whether to reduce the boiling water amount TW (FIG. 9). In this case, the user determines whether to reduce the boiling water amount TW in the boiling operation or to stop the boiling operation. When reducing the boiling water amount TW, the user operates the switch unit 78a, and when stopping the boiling operation, the user operates the switch unit 78b. The remote controller 76 transmits a signal based on a user operation to the controller.

  When the user gives an instruction to reduce the boiling water amount TW (YES in step S24), the controller reduces the boiling water amount TW, and returns to step S10 (processing for calculating a predicted boiling operation completion time). In addition, as a method of reducing the boiling water amount TW, the user may set so as to be able to input to the remote controller 76, or the controller may subtract a predetermined water amount (for example, 20 liters). On the other hand, when there is no instruction from the user to reduce the boiling water amount TW (NO in step S24), the controller ends the processing in FIG. As described above, the controller repeats the processing of steps S10 to S14 until the user inputs an instruction to perform the boiling operation or an instruction to stop the boiling operation. In this embodiment, the case where the suppression power WS is 700 W is described. As described above, different values are set for the suppression power WS depending on the capacity of the storage battery 104 used in the power supply unit 9, and for example, the suppression power WS may be 1000 W. In this case, in the hot water supply process, the controller determines the completion completion time TE based on the second boiling capacity area 136b of the first table 132, the second HP operation rate area 138b, and the second boiling efficiency area 146b of the second table 142. And a predicted power amount Wh1.

  During the operation corresponding to the storage battery, it is necessary to effectively utilize the remaining power Wh2 of the storage battery between the hot water supply system 2 and the important load 112. According to the above configuration, during the operation corresponding to the storage battery, the user can know the predicted power amount Wh1 consumed by the hot water supply system 2 during the boiling operation. Thus, the user can appropriately determine whether or not to perform the boiling operation by comparing the remaining power amount Wh2 of the storage battery with the predicted power amount Wh1. For example, when the remaining power amount Wh2 has a sufficient margin with respect to the predicted power amount Wh1, the remote controller 76 is operated to execute the boiling operation, and the remaining power amount Wh2 is smaller than the predicted power amount Wh1. Is to operate the remote controller 76 to stop the boiling operation.

  Further, in the above-described embodiment, during the operation corresponding to the storage battery, the controller calculates the electric energy Wh4 of the devices other than the heat pump heat source consumed in the boiling operation based on the predicted completion time TE of the boiling operation. . In the hot water supply system 2 during the boiling operation, not only the heat pump heat source but also devices other than the heat pump heat source of the hot water supply system 2 consume power. Further, the time required for the boiling operation may be different between the normal operation and the operation corresponding to the storage battery. Therefore, during the heating operation, the accuracy of the predicted power amount Wh1 can be increased by calculating the power amount Wh4 of the devices other than the heat pump heat source consumed in the boiling operation based on the predicted completion time TE.

  Further, in the above embodiment, during the operation corresponding to the storage battery, the controller includes the electric energy of the heater during the boiling operation in the electric energy Wh4 of the devices other than the heat pump heat source. When the anti-freezing operation is performed during the boiling operation, electric power is consumed by heating the plurality of heaters 35. By including the electric energy of the heater during the boiling operation in the electric energy Wh4, it is possible to improve the accuracy of the electric energy Wh4 of the devices other than the heat pump heat source when the anti-freezing operation is performed during the boiling operation. As a result, the accuracy of the predicted power amount Wh1 can be improved.

  Further, in the above embodiment, during the operation corresponding to the storage battery, the controller specifies the boiling efficiency E of the heat pump heat source based on the outside air temperature TO, and calculates the predicted power amount Wh1 based on the specified boiling efficiency E. It has been calculated. As shown in the boiling efficiency region 146 of FIG. 3, when the outside air temperature TO is different, the boiling efficiency E of the heat pump heat source is different. Therefore, by calculating the predicted power amount Wh1 using the boiling efficiency E specified based on the outside air temperature TO, the accuracy of the predicted power amount Wh1 can be improved.

  Further, in the above embodiment, during the operation corresponding to the storage battery, the controller specifies the boiling efficiency E of the heat pump heat source based on the power consumption W2 that can be used by the heat pump heat source during the boiling operation, and specifies the specified boiling efficiency. The predicted power amount Wh1 is calculated based on the efficiency E. When the power consumption W1 of the hot water supply system 2 needs to be suppressed to the suppression power WS or less during the operation corresponding to the storage battery, the power consumption W2 that can be used by the heat pump heat source during the boiling operation may also be suppressed. As shown in the first boiling efficiency region 146a and the second boiling efficiency region 146b of FIG. 3, if the power consumption W2 is different, the boiling efficiency E is different. Accordingly, the accuracy of the predicted power amount Wh1 can be improved by calculating the predicted power amount Wh1 using the boiling efficiency E specified based on the power consumption W2 that can be used by the heat pump heat source during the boiling operation. .

  In the above embodiment, the controller calculates the completion completion time TE based on the operation rate R of the heat pump heat source until the completion of the boiling operation during the storage battery operation. In this embodiment, if the anti-freezing operation is performed before the boiling operation is completed during the storage battery operation, the power consumption W1 of the hot water supply system 2 exceeds the suppression power WS. For this reason, the controller stops the operation of the heat pump heat source during the driving operation of the plurality of heaters 35, and operates the heat pump heat source during the non-driving operation of the plurality of heaters 35. In this case, the operating rate R of the heat pump heat source differs depending on the ratio between the driving time t2 and the non-driving time t3 of the driving operation of the plurality of heaters 35. As the operation rate R of the heat pump heat source decreases, the time required to complete the boiling operation increases. Therefore, by specifying the operating rate R of the heat pump heat source until the completion of the boiling operation and calculating the predicted completion time TE based on the specified operating rate R, the accuracy of the predicted completion time TE can be improved.

  Further, in the above-described embodiment, during the operation corresponding to the storage battery, the controller specifies the boiling capacity H of the heat pump heat source based on the outside air temperature TO, and sets the estimated completion time TE based on the specified boiling capacity H. It has been calculated. As shown in the boiling capacity area 136 in FIG. 2, when the outside air temperature is different, the boiling capacity H of the heat pump heat source is different. Therefore, by using the boiling capacity H specified based on the outside air temperature TO, the accuracy of the predicted completion time TE can be improved.

  Further, in the above embodiment, during the operation corresponding to the storage battery, the boiling capacity H of the heat pump heat source is specified based on the power consumption W2 that can be used by the heat pump heat source during the boiling operation, and the specified heat pump heat source is heated. The predicted completion time TE is calculated based on the capability H. When it is necessary to suppress the power consumption W1 of the hot water supply system 2 to be equal to or less than the suppression power WS during the operation corresponding to the storage battery, the power consumption W2 that can be used by the heat pump heat source during the boiling operation may also be suppressed. As shown in the boiling capacity area 136 of the first table 132 in FIG. 2, when the power consumption W2 that can be used by the heat pump heat source is different, the boiling capacity H of the heat pump heat source is different. For this reason, when the power consumption W2 that can be used by the heat pump heat source during the boiling operation is suppressed, the predicted completion time TE is delayed. Accordingly, by using the boiling capacity H of the heat pump heat source specified based on the power consumption W2 that can be used by the heat pump heat source during the boiling operation, the accuracy of the predicted completion time TE can be improved.

  In the above embodiment, the controller calculates the predicted power amount Wh1 based on the boiling water amount TW instructed by the user during the storage battery operation. In this case, the controller causes the display unit 77 to display the predicted power amount Wh1 based on the boiling water amount TW of the water specified by the user. Thus, the user can operate the remote controller 76 to execute the heating operation only when the predicted power amount Wh1 is determined to be usable for the heating operation.

  Here, the correspondence between the description of the embodiment and the description of the claims will be described. Water is an example of a “heating medium”. Fuel gas is an example of “fuel”. The commercial power supply is an example of a “commercial power system”. The predicted completion time is an example of the “predicted boiling operation completion time”.

  As described above, specific examples of the present invention have been described in detail, but these are merely examples, and do not limit the scope of the claims. The technology described in the claims includes various modifications and alterations of the specific examples illustrated above.

  In the above embodiment, when the boiling operation and the freezing prevention operation are simultaneously performed during the storage battery operation, the operation of the heat pump heat source is stopped during the heater driving operation. However, the operation of the heat pump heat source may be continued during the heater driving operation. In this case, the power consumption W2 # of the heat pump heat source may be suppressed such that the sum of the power consumption W2 # of the heat pump heat source and the power consumption W5 of the devices other than the heat pump heat source is equal to or less than the suppression power WS. Since the power consumption W5 differs between the heater driving operation and the heater non-driving operation, the power consumption W2 'also differs during the heater driving operation and the heater non-driving operation.

  The technical elements described in the present specification or the drawings exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. In addition, the technology illustrated in the present specification or the drawings can simultaneously achieve a plurality of objects, and has technical utility by achieving one of the objects.

2: Hot water supply system 4: HP unit 6: Tank unit 8: Burner unit 9: Power supply unit 10: Compressor 12: Condenser 14: Expansion valve 16: Evaporator 18: Circulation pump 19: HP going path 20: Return thermistor 21: HP return path 22: outgoing thermistor 24: HP controller 30: tank 31: tank outgoing path 32: mixing valve 33: tank return path 34: bypass control valve 35: heater 36a: thermistor 36b: thermistor 36c: thermistor 36d: thermistor 36e: thermistor 39: tank outside air temperature thermistor 40: water supply path 42: pressure reducing valve 44: water supply thermistor 46: tank water supply path 48: tank bypass path 50: check valve 52: check valve 54: water side water amount sensor 56: tank Hot water supply path 58: check valve 60: hot water Water quantity sensor 62: First hot water supply path 64: Mixing thermistor 66: Second hot water supply path 68: Hot water supply outlet thermistor 70: Check valve 72: Hot water supply bypass path 74: Tank controller 75: Non-volatile memory 76: Remote controller 77: Display section 78 : Operation unit 78a: switch unit 78b: switch unit 80: burner 81: gas supply pipe 82: heat exchanger 83: air supply pipe 84: bypass servo 85: igniter 86: water quantity servo 87: frame rod 88: hot water valve 90 : Burner outward path 91: Water amount sensor 92: Burner return path 94: Burner bypass path 96: Burner hot water supply thermistor 98: Hot water path 100: Burner controller 102: Commercial power supply 104: Storage battery 106: Distribution board 108: Distribution board 110 for storage battery : General load 112: Important load 132: First tape 134: outside air temperature area 134a: first area 134b: second area 134c: third area 136: boiling capacity area 136a: first boiling capacity area 136b: second boiling capacity area 138: HP operation rate area 138a : First HP operating rate area 138b: Second HP operating rate area 142: Second table 144: Outside air temperature area 144a: First area 144b: Second area 144c: Third area 146: Boiling efficiency area 146a: First boiling Efficiency area 146b: Second boiling efficiency area 148: Heater average power area

Claims (9)

A hot water supply system that operates by being supplied with electric power from a commercial power system or a storage battery,
A heat pump heat source that consumes electric power and heats the heat medium,
A tank for storing the heat medium heated by the heat pump heat source,
A display unit for displaying information to a user;
And an operation unit ,
The control device is capable of switching between a normal operation that operates by supplying power from a commercial power system and a battery-compatible operation that operates by supplying power from a storage battery,
The control device drives the heat pump heat source, and is configured to be able to execute a boiling operation for storing the heat medium heated by the heat pump heat source in the tank,
The user can adjust the heating amount of the heating medium in the boiling operation by operating the operation unit,
The control device is configured to predict , according to the heating amount of the heat medium instructed by the user, that the heating operation be performed when the user performs an operation for performing the boiling operation during the storage battery operation. A hot water supply system for calculating an electric energy and displaying the calculated predicted electric energy on a display unit. The control device is configured to consume the power in the heating operation based on the power of the heat pump heat source consumed in the heating operation and the power of the devices other than the heat pump heat source consumed in the heating operation during the operation corresponding to the storage battery. Calculated expected power amount,
2. The hot water supply according to claim 1, wherein the controller calculates the amount of electric power of equipment other than the heat pump heat source consumed in the boiling operation based on the predicted boiling operation completion time of the boiling operation during the storage battery operation. 3. system. It further includes a heater provided in a path through which the heat medium flows,
The control device is configured to be able to execute an anti-freezing operation for preventing freezing of the heat medium by heating the heater,
When the anti-freezing operation is performed before the boiling operation is completed during the storage battery-compatible operation, the control device includes the predicted electric energy consumed in the boiling operation and the electric power of the heater until the boiling operation is completed. 3. The hot water supply system of claim 2, wherein the system includes a quantity. A hot water supply system that operates by being supplied with electric power from a commercial power system or a storage battery,
A heat pump heat source that consumes electric power and heats the heat medium,
A tank for storing the heat medium heated by the heat pump heat source,
A heater provided in a path through which the heat medium flows,
A display unit for displaying information to a user,
The control device is capable of switching between a normal operation that operates by supplying power from a commercial power system and a battery-compatible operation that operates by supplying power from a storage battery,
The control device can perform a boiling operation in which the heat pump heat source is driven to store the heat medium heated by the heat pump heat source in the tank, and an antifreeze operation in which the heater is heated to prevent freezing of the heat medium. It is composed of
The control device is configured such that, when the user performs an operation for performing the boiling operation during the operation corresponding to the storage battery, the power amount of the heat pump heat source consumed in the heating operation and the heat pump consumed in the heating operation. Based on the power amounts of the devices other than the heat source, based on the predicted power amount consumed in the boiling operation, display the calculated predicted power amount on the display unit,
The control device calculates the electric energy of the devices other than the heat pump heat source consumed in the boiling operation based on the predicted boiling operation completion time of the boiling operation during the storage battery operation,
When the anti-freezing operation is performed before the boiling operation is completed during the storage battery-compatible operation, the control device includes the predicted electric energy consumed in the heating operation and the electric power of the heater until the boiling operation is completed. Include the quantity , hot water system. The control device, during the operation corresponding to the storage battery, specifies the boiling efficiency of the heat pump heat source based on the outside air temperature, and calculates a predicted amount of power consumed in the boiling operation based on the specified boiling efficiency. Item 5. The hot water supply system according to any one of Items 1 to 4 . The controller is configured to operate during the heating operation so that the sum of the power consumption of the heat pump heat source during the heating operation and the power consumption of the devices other than the heat pump heat source during the heating operation is equal to or less than the suppression power during the storage battery operation. It controls the power consumption of the heat pump heat source,
The control device specifies the boiling efficiency of the heat pump heat source based on the power consumption of the heat pump heat source during the boiling operation during the operation corresponding to the storage battery. The hot water supply system according to any one of claims 1 to 5 , wherein the predicted power consumption is calculated. If the anti-freezing operation is performed before the completion of the boiling operation during the operation corresponding to the storage battery, the control device estimates the completion time of the boiling operation based on the operation rate of the heat pump heat source until the completion of the boiling operation. calculating the hot water supply system according to claim 3 or 4. Controller, during battery corresponding operation, based on the outside air temperature, and identifies the heating-up performance of the heat pump heat source, based on the specified heating-up capacity, and calculates the heating-up operation completion prediction time, according to claim 3 or 4 The hot water supply system according to 1. The control device controls the heat pump heat source during the heating operation so that the sum of the power consumption of the heat pump heat source during the heating operation and the power consumption other than the heat pump heat source during the heating operation is equal to or less than the suppression power during the operation corresponding to the storage battery. Controlling the power consumption of
The control device identifies the boiling capacity of the heat pump heat source during the operation corresponding to the storage battery based on the power consumption of the heat pump heat source during the boiling operation, and completes the boiling operation based on the identified boiling capability of the heat pump heat source. calculating a prediction time, hot-water supply system according to claim 3 or 4.

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