JP6484510B2 - Heat source equipment - Google Patents

Description

  The technology disclosed in the present specification relates to a heat source device.

  Patent Document 1 discloses an electric heat source device that consumes electric power to heat a heat medium, and a heat source device that includes a control device. This heat source device is configured to operate with power supplied from a commercial power source or a power source that is a storage battery.

JP2013-88060A

  It is preferable that the operation of the heat source device differs between the case where the power source is a commercial power source and the case where the power source is a storage battery, depending on the characteristics of each power source. If the heat source device can automatically determine whether the power source is a commercial power source or a storage battery, the operation of the heat source device can be appropriately performed based on the determination result.

  In this specification, the technique which solves said subject is provided. The present specification provides a technology capable of automatically determining the type of a power source in a heat source device that operates by being supplied with power from a power source that is a commercial power source or a storage battery.

  The present specification discloses a heat source device including an electric heat source device that consumes electric power to heat a heat medium, and a control device including a nonvolatile memory. The heat source device is configured to operate by being supplied with electric power from a commercial power source or a storage battery having different power supply states. The control device is configured to store the supply status of power to the heat source device in the nonvolatile memory while power is supplied from the power source. When the power supply from the power supply is started after the power supply from the power supply is stopped, the control device restarts the power supply based on the power supply status stored in the nonvolatile memory. Is configured to determine whether it is a commercial power source or a storage battery.

  The power supply state before the power supply is stopped differs between when the power source is a commercial power source and when the power source is a storage battery. In the heat source device described above, the supply status of power to the heat source device is stored in the nonvolatile memory while power is supplied from the power source. Then, when the power supply from the power supply is stopped and then the power supply from the power supply is restarted, the control device stores the power supply status stored in the nonvolatile memory, that is, before the power supply is stopped. It is determined whether the resumed power supply is a commercial power supply or a storage battery based on the power supply status of the power supply. According to the heat source device, it is possible to automatically determine whether the resumed power supply is a commercial power source or a storage battery.

  In the above heat source device, the power supply status to the heat source device may include power consumption in the heat source device.

  A general storage battery is provided with a protection circuit that cuts off discharge when the power to be discharged becomes equal to or higher than the upper limit discharge power. For this reason, when the power supply is a storage battery, the power supply from the power supply is stopped when the power consumption in the heat source device is equal to or higher than the upper limit discharge power of the storage battery. Conversely, when the power source is a commercial power source, the power supply from the power source is not stopped even if the power consumption in the heat source device is equal to or greater than the upper limit discharge power of the storage battery. Therefore, in the above heat source device, it is determined whether the resumed power supply is a commercial power source or a storage battery based on the power consumption of the heat source device immediately before the power supply from the power source is stopped. With this configuration, it is possible to accurately determine whether the resumed power supply is a commercial power source or a storage battery.

  In the above heat source device, the supply status of power to the heat source device may include a duration of power supply to the heat source device.

  A general storage battery is provided with a protection circuit that cuts off discharge under various conditions. For this reason, when a power supply is a storage battery, compared with the case where a power supply is a commercial power supply, the electric power supply from a power supply is easy to be stopped. Therefore, in the above heat source device, it is determined whether the resumed power supply is a commercial power supply or a storage battery based on the duration of the power supply until immediately before the power supply from the power supply is stopped. With this configuration, it is possible to accurately determine whether the resumed power supply is a commercial power source or a storage battery.

  The heat source device may be configured to increase power consumption in the heat source device when the control device does not determine that the resumed power supply is a storage battery.

  In a situation where the power consumption of the heat source device is low, even when a storage battery is used as the power source, the protection circuit for the storage battery does not operate, and the power supply from the power source is not often stopped. In such a case, whether the resumed power supply is a commercial power supply or a storage battery is reliably determined from the power supply status to the heat source device until the power supply from the power supply is stopped. It becomes difficult. Therefore, in the heat source device described above, when power supply from the power source is started and the power source is not determined to be a storage battery, power consumption in the heat source device is increased. In this case, if the power source is a storage battery, the protection circuit is activated and the power supply from the power source is stopped again. Then, when the power supply from the power source is resumed thereafter, it is determined that the resumed power supply is a storage battery from the power supply status to the heat source device until the power supply from the power source is stopped. Can do. Conversely, if the power source is a commercial power source, the power supply from the power source will not stop even if the power consumption in the heat source device is increased. In this case, it can be determined that the resumed power supply is a commercial power supply. According to the heat source device, it is possible to reliably determine whether the resumed power supply is a commercial power source or a storage battery.

  The heat source device further includes a fuel-type heat source machine that consumes fuel and heats the heat medium, and the control device starts power supply from the power source from a state where power supply from the power source is stopped. In this case, the heating medium may be heated by the fuel type heat source unit to determine whether fuel is supplied to the fuel type heat source unit.

  According to the above heat source device, in addition to the determination of the type of power supply, the presence or absence of fuel supply can also be automatically determined.

The figure which shows typically the structure of the hot water supply system 2 which concerns on an Example. The flowchart which shows the example of the process which the controller of the hot water supply system 2 which concerns on an Example performs at the time of the start of electric power supply. The flowchart which shows another example of the process which the controller of the hot water supply system 2 which concerns on an Example performs at the time of the start of electric power supply. The flowchart which shows another example of the process which the controller of the hot water supply system 2 which concerns on an Example performs at the time of the start of electric power supply. The flowchart which shows another example of the process which the controller of the hot water supply system 2 which concerns on an Example performs at the time of the start of electric power supply.

(Example)
As shown in FIG. 1, the hot water supply system 2 according to this 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 absorbs heat from outside air and heats water. The HP unit 4 includes a compressor 10, a condenser 12, an expansion valve 14, and an evaporator 16. The compressor 10 pressurizes the refrigerant to a high temperature and a high pressure. The condenser 12 cools the refrigerant by exchanging heat with water. The expansion valve 14 depressurizes the refrigerant to low temperature and low pressure. The evaporator 16 heats the refrigerant by exchanging heat with the outside air. The HP unit 4 circulates a refrigerant (for example, a fluorocarbon refrigerant) in the order of the compressor 10, the condenser 12, the expansion valve 14, and the evaporator 16, thereby absorbing heat from outside air and heating water. The HP unit 4 further includes a circulation pump 18 that circulates water through the condenser 12, a return thermistor 20 that detects the temperature of water flowing into the condenser 12, and a forward thermistor 22 that detects the temperature of water flowing out of the condenser 12. The outside temperature thermistor 23 for detecting the outside temperature and the HP controller 24 for controlling the operation of each component of the HP unit 4 are provided.

  The tank unit 6 includes a tank 30, a mixing valve 32, and a bypass control valve 34. The tank 30 is a sealed container that is covered with a heat insulating material and stores water therein. 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 is sucked out from the bottom of the tank 30 and sent to the condenser 12. The water heated by the condenser 12 and having a high temperature is returned from the top of the tank 30 into the tank 30. When the water heated by the HP unit 4 flows into the tank 30, a temperature stratification is formed in the tank 30 in which a high-temperature water layer is stacked on a low-temperature water layer. An upper thermistor 36 that detects the temperature of the upper water, an intermediate thermistor 37 that detects the temperature of the intermediate water, and a lower thermistor 38 that detects the temperature of the lower water are attached to the tank 30. In this embodiment, the upper thermistor 36 is disposed at a position 6 liters from the top of the tank 30, the intermediate thermistor 37 is disposed at a position 12 liters from the top of the tank 30, and the lower thermistor 38 is disposed at the tank 30. 30 liters from the top of the.

  Tap water is supplied to the tank unit 6 through the water supply path 40. In the water supply path 40, a pressure reducing valve 42 for reducing the water supply pressure and a water inlet thermistor 44 for detecting the water supply temperature are attached. The water supply path 40 branches into a tank water supply path 46 that communicates with the bottom of the tank 30 and a tank bypass path 48 that communicates 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. Further, a water-side water amount sensor 54 that detects the flow rate of tap water flowing into the mixing valve 32 is attached to the tank bypass path 48. The top of the tank 30 and the mixing valve 32 communicate with each other via a tank hot water path 56. A check valve 58 and a hot water sensor 60 for detecting the flow rate of water from the tank 30 flowing into the mixing valve 32 are attached to the tank discharge path 56.

  The mixing valve 32 mixes the tap water flowing from the tank bypass passage 48 and the water from the tank 30 flowing from the tank discharge passage 56 and sends it out to the first hot water supply passage 62. The mixing valve 32 is driven by a stepping motor to adjust the opening degree on the tank bypass path 48 side (opening side on the water side) and the opening degree on the tank discharge path 56 side (opening side on the hot water side). A mixing thermistor 64 that detects the temperature of the water fed from the mixing valve 32 is attached to the first hot water supply path 62.

  Hot water is supplied from the tank unit 6 to hot water supply points such as a kitchen, a shower, and a currant through the second hot water supply path 66. A hot water supply outlet thermistor 68 that detects the temperature of water supplied to the hot water supply location and a check valve 70 are attached to the second hot water supply path 66. The first hot water supply path 62 and the second hot water supply path 66 communicate with each other through a hot water supply bypass path 72. A bypass control valve 34 is attached to the hot water supply bypass path 72.

  The tank unit 6 further includes a tank controller 74 and a remote controller 76 that can communicate 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 remote control 76 accepts various operation inputs from the user via switches, buttons, and the like. In addition, the remote controller 76 notifies the user of various types of information related to the settings and operations of the hot water supply system 2 by display and sound.

  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 machine that heats water flowing through the heat exchanger 82 by combustion of fuel gas. Fuel gas is supplied to the burner 80 via a gas supply pipe 81. Water from the first hot water supply path 62 of the tank unit 6 flows into the heat exchanger 82 via the burner forward path 90. The water that has passed through the heat exchanger 82 flows out to the second hot water supply path 66 of the tank unit 6 through the burner return path 92. A water quantity servo 86 for adjusting the flow rate of water flowing through the burner forward path 90 and a water quantity sensor 91 for detecting the flow rate of water flowing through the burner forward path 90 are attached to the burner forward path 90. The burner forward 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 portion between the burner forward path 90 and the burner bypass path 94. The bypass servo 84 adjusts the flow rate of water flowing from the burner forward path 90 to the burner bypass path 94. A burner hot water thermistor 96 that detects the temperature of water flowing out from 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. Hot water is poured from the burner unit 8 to the bathtub, which is a hot water supply location, via the 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 the 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 distribution board 102, a storage battery 104, and a switch 106. The distribution board 102 is connected to a commercial power source 108, and distributes and supplies power supplied from the commercial power source 108 to the switch 106 and the storage battery 104. The storage battery 104 is a secondary battery such as a lithium ion secondary battery. The storage battery 104 can charge the power supplied from the commercial power supply 108 via the distribution board 102, and can discharge the charged power to the switch 106. The storage battery 104 has a built-in protection circuit (not shown), and the discharge to the switch 106 is cut off when the power to be discharged is equal to or higher than the upper limit discharge power (for example, 650 W). The switch 106 supplies power supplied from the commercial power source 108 via the distribution board 102 to the HP unit 4, the tank unit 6 and the burner unit 8, and supplies power supplied from the storage battery 104 to the HP unit 4, The state is switched between supplying the tank unit 6 and the burner unit 8. In a situation where the power supply from the commercial power source 108 is normally performed, the switch 106 supplies the power supplied from the commercial power source 108 via the distribution board 102 to the HP unit 4, the tank unit 6, and the burner unit 8. Supply. In a situation where the power supply from the commercial power supply 108 is not normally performed, the switch 106 supplies the power supplied from the storage battery 104 to the HP unit 4, the tank unit 6 and the burner unit 8.

  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, the hot water supply system 2 can perform various operations such as a boiling operation and a hot water supply operation by the HP controller 24, the tank controller 74, and the burner controller 100 performing control in cooperation. The tank controller 74 stores the power supply status from the power supply unit 9 to the hot water supply system 2 in the nonvolatile memory 75 while the power supply from the power supply unit 9 is being performed. For example, the tank controller 74 stores the duration of power supply from the power supply unit 9 in the nonvolatile memory 75 while the power supply from the power supply unit 9 is being performed. In this case, when the power supply from the power supply unit 9 is stopped, and then the power supply from the power supply unit 9 is resumed, the nonvolatile memory 75 immediately before the power supply from the power supply unit 9 is stopped. Thus, the duration of power supply from the power supply unit 9 is stored. And / or the tank controller 74 stores the power consumption in the hot water supply system 2 in the nonvolatile memory 75 while the power supply from the power supply unit 9 is being performed. In this case, when the power supply from the power supply unit 9 is stopped, and then the power supply from the power supply unit 9 is resumed, the nonvolatile memory 75 immediately before the power supply from the power supply unit 9 is stopped. Thus, the power consumption in the hot water supply system 2 is stored. In addition, since most of the power consumption in the hot water supply system 2 is the power consumption in the HP unit 4, the tank controller 74 replaces the power consumption in the hot water supply system 2 while the power supply from the power supply unit 9 is being performed. The power consumption in the HP unit 4 may be stored in the nonvolatile memory 75. Hereinafter, the HP controller 24, the tank controller 74, and the burner controller 100 are collectively referred to simply as a controller.

  Below, the boiling operation and hot water supply operation which the hot water supply system 2 performs are demonstrated.

  In the boiling operation, the hot water supply system 2 drives the HP unit 4 to boil the water in the tank 30. The timing for starting the boiling operation can be set from various viewpoints. For example, the controller may determine the start timing of the boiling operation so that the boiling of the water in the tank 30 ends immediately before the time period in which cheap midnight power can be used ends. Alternatively, based on the actual hot water supply results up to the previous day, the controller determines the start timing of the boiling operation so that the boiling of the water in the tank 30 is completed immediately before the time at which a large demand for hot water supply is expected. Also good. Alternatively, the controller may start the boiling operation when the user instructs the boiling of water in the tank 30 via the remote controller 76.

  When the boiling operation is started, the controller 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 drives the circulation pump 18. The 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 in the condenser 12 and returned to the top of the tank 30. When all the water in the tank 30 is replaced with water heated to the boiling temperature, the controller ends the boiling operation.

  In the hot water supply operation, water at a hot water supply set temperature is supplied to the hot water supply location. When the flow rate detected by the water-side water amount sensor 54 and the flow rate detected by the hot water-side water amount sensor 60 (referred to as a hot water supply flow rate) is equal to or greater than the minimum operating flow rate (for example, 2.4 L / min). It is determined that the hot water supply has been started by opening the hot water supply location or hot water to the bathtub. Then, the controller executes the following non-combustion hot water supply operation or combustion hot water supply operation in accordance with the temperature detected by the upper thermistor 36.

  When the temperature detected by the upper thermistor 36 is equal to or higher than the hot water supply set temperature, the controller performs a non-combustion hot water supply operation. In the non-combustion hot water supply operation, the controller prohibits the combustion operation of the burner 80 and adjusts the opening of the mixing valve 32 so that the temperature detected by the mixing thermistor 64 becomes the hot water supply set temperature. Thus, water whose temperature is adjusted to the hot water supply set temperature is supplied to the hot water supply location.

  When the temperature detected by the upper thermistor 36 is lower than the hot water supply set temperature, the controller executes the combustion hot water supply operation. In the combustion hot water supply operation, the controller permits the burner 80 to perform the combustion operation, and mixes so that the temperature detected by the mixing thermistor 64 is lower than the hot water supply set temperature by the minimum heating capacity of the burner 80. The opening degree of the valve 32 is adjusted. In this case, the high temperature water supplied from the upper part 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, so Supplied to.

  If the hot water flow rate falls below the minimum operating flow rate during the non-combustion hot water supply operation or combustion hot water supply operation described above, the controller determines that the hot water supply has been terminated due to the closure of the hot water supply location or the end of hot water to the bathtub. To end the hot water supply operation.

(Operation when power supply starts)
When the power supply from the power supply unit 9 is started from the state where the power supply from the power supply unit 9 is stopped, the controller executes the process shown in FIG.

  In step S <b> 2, the controller reads from the nonvolatile memory 75 the power supply duration (also referred to as energization duration) until immediately before the power supply from the power supply unit 9 stops.

  In step S4, the controller determines whether the energization duration acquired from the nonvolatile memory 75 is a predetermined time (for example, 24 hours) or more. If the supply source of power supplied from the power supply unit 9 to the hot water supply system 2 is the commercial power supply 108, it is unlikely that the power supply from the power supply unit 9 stops so frequently. On the contrary, when the supply source of the power supplied from the power supply unit 9 to the hot water supply system 2 is the storage battery 104, it is considered that the power supply from the power supply unit 9 often stops due to the operation of the protection circuit of the storage battery 104. It is done. Therefore, in the hot water supply system 2 of the present embodiment, when the energization duration acquired from the nonvolatile memory 75 is less than the predetermined time, the supply source of the electric power supplied from the power supply unit 9 to the hot water supply system 2 is the storage battery 104. Judge that there is. Further, when the energization duration acquired from the nonvolatile memory 75 is equal to or longer than a predetermined time, it is determined that the supply source of the power supplied from the power supply unit 9 to the hot water supply system 2 is the commercial power source 108.

  In step S4, when the energization duration is equal to or longer than the predetermined time (in the case of YES), the process proceeds to step S6. In step S <b> 6, the controller prohibits the non-combustion hot water supply operation in the hot water supply system 2. Accordingly, when the hot water supply system 2 supplies hot water thereafter, the hot water supply system 2 performs the combustion hot water supply operation regardless of the temperature of the water stored in the tank 30.

  In step S <b> 8, the controller determines whether fuel gas is being supplied to the burner 80. Specifically, the controller determines that fuel gas is being supplied to the burner 80 when the combustion of the burner 80 is normally performed in the combustion hot water supply operation. Conversely, the controller determines that the fuel gas is not supplied to the burner 80 when the combustion of the burner 80 is not normally performed in the combustion hot water supply operation.

  In step S8, when the fuel gas is being supplied to the burner 80 (in the case of YES), the process proceeds to step S10. At the time when the process of step S10 is executed, it is considered that the power supply from the commercial power source 108 is normally performed and the fuel gas supply from the gas supply pipe 81 is also normally performed. Therefore, in step S10, the controller permits the non-combustion hot water supply operation in the hot water supply system 2. Therefore, when the hot water supply system 2 supplies hot water thereafter, the hot water supply system 2 executes a non-combustion hot water supply operation or a combustion hot water supply operation according to the temperature of the water stored in the tank 30. After step S10, the controller ends the process of FIG. 2 and performs a normal operation.

  In step S8, when the fuel gas is not supplied to the burner 80 (in the case of NO), the process proceeds to step S12. At the time of executing the process of step S12, it is considered that the power supply from the commercial power source 108 is normally performed and the fuel gas supply from the fuel gas supply source is not normally performed. Therefore, in step S12, the controller permits the non-combustion hot water supply operation in the hot water supply system 2. In step S14, the controller prohibits the combustion hot water supply operation in the hot water supply system 2. Therefore, when the hot water supply system 2 supplies hot water thereafter, the hot water supply system 2 executes the non-combustion hot water supply operation regardless of the temperature of the water stored in the tank 30.

  In step S16, the controller sets the heating capacity of the HP unit 4 to the maximum heating capacity. Therefore, when the hot water supply system 2 performs the boiling operation thereafter, the water in the tank 30 is heated by the maximum heating capacity of the HP unit 4. Thus, it is possible to suppress a situation in which the amount of heat stored in the tank 30 is insufficient while the hot water supply system 2 is prohibited from the combustion hot water supply operation.

  In step S18, the controller stands by until a predetermined time (for example, 24 hours) elapses after the power supply from the power supply unit 9 is started. Even when the fuel gas is not normally supplied to the burner 80, if a predetermined time has elapsed since the start of the power supply from the power supply unit 9, the fuel gas is supplied from the gas supply pipe 81 to the burner 80. Supply is considered restored. If the elapsed time from the start of power supply from the power supply unit 9 reaches a predetermined time (YES in step S18), the process proceeds to step S20.

  In step S <b> 20, the controller permits the combustion hot water supply operation in the hot water supply system 2. Therefore, when the hot water supply system 2 supplies hot water thereafter, the hot water supply system 2 executes a non-combustion hot water supply operation or a combustion hot water supply operation according to the temperature of the water stored in the tank 30. After step S20, the controller ends the process of FIG. 2 and performs a normal operation.

  In step S4, when the energization continuation time acquired from the nonvolatile memory 75 is less than the predetermined time (in the case of NO), the process proceeds to step S22.

  In step S22, the controller prohibits the non-combustion hot water supply operation in the hot water supply system 2. Accordingly, when the hot water supply system 2 supplies hot water thereafter, the hot water supply system 2 executes the combustion hot water supply operation regardless of the temperature of the water stored in the tank 30.

  In step S24, the controller determines whether or not fuel gas is being supplied to the burner 80. Specifically, the controller determines that fuel gas is being supplied to the burner 80 when the combustion of the burner 80 is normally performed in the combustion hot water supply operation. Conversely, the controller determines that the fuel gas is not supplied to the burner 80 when the combustion of the burner 80 is not normally performed in the combustion hot water supply operation.

  In step S24, when the fuel gas is being supplied to the burner 80 (in the case of YES), the process proceeds to step S26. At the time of executing the process of step S26, the power supply from the commercial power source 108 is not normally performed, the power supply is performed from the storage battery 104 instead, and the fuel gas supply from the gas supply pipe 81 is not performed. It is thought that it was done normally. Therefore, in step S26, the controller prohibits the boiling operation in the hot water supply system 2. Thereafter, the hot water supply system 2 always supplies hot water by the combustion hot water supply operation without executing the boiling operation or the non-combustion hot water supply operation. Thereby, the situation where the electric power of the storage battery 104 is consumed by performing the boiling operation can be suppressed.

  In step S28, the controller stands by until a predetermined time (for example, 24 hours) elapses after the power supply from the power supply unit 9 is started. When a predetermined time has elapsed since the start of power supply from the power supply unit 9, it is determined that the power supply from the commercial power supply 108 has been restored. If the elapsed time from the start of power supply from the power supply unit 9 reaches a predetermined time (YES in step S28), the process proceeds to step S30.

  In step S <b> 30, the controller permits boiling operation in the hot water supply system 2. In step S32, the controller permits the non-combustion hot water supply operation in the hot water supply system 2. Therefore, when the hot water supply system 2 supplies hot water thereafter, the hot water supply system 2 executes a non-combustion hot water supply operation or a combustion hot water supply operation according to the temperature of the water stored in the tank 30. After step S32, the controller ends the process of FIG. 2 and performs a normal operation.

  In step S24, when the fuel gas is not supplied to the burner 80 (in the case of NO), the process proceeds to step S34. At the time when the process of step S34 is executed, the power supply from the commercial power source 108 is not performed, the power supply from the storage battery 104 is performed instead, and the fuel gas supply from the gas supply pipe 81 is normally performed. Probably not done. Therefore, in step S34, the controller permits the non-combustion hot water supply operation in the hot water supply system 2. In step S36, the controller prohibits the combustion hot water supply operation in the hot water supply system 2. Therefore, when the hot water supply system 2 supplies hot water thereafter, the hot water supply system 2 executes the non-combustion hot water supply operation regardless of the temperature of the water stored in the tank 30.

  In step S40, the controller sets the heating capacity of the HP unit 4 to a suppressed heating capacity that is lower than the normal heating capacity. Therefore, when the hot water supply system 2 performs the boiling operation thereafter, the water in the tank 30 is boiled by the suppressed heating capacity of the HP unit 4. Thus, it is possible to suppress a situation in which the power of the storage battery 104 is excessively consumed by performing the boiling operation while enabling the non-combustion hot water supply operation by the hot water supply system 2.

  In step S42, the controller stands by until a predetermined time (for example, 24 hours) elapses after the power supply from the power supply unit 9 is started. In the hot water supply system 2 of the present embodiment, when a predetermined time has elapsed since the start of power supply from the power supply unit 9, the power supply from the commercial power supply 108 and the fuel gas supply from the gas supply pipe 81 are restored. Judge that If the elapsed time from the start of power supply from the power supply unit 9 reaches a predetermined time (YES in step S42), the process proceeds to step S44.

  In step S44, the controller permits the hot water supply system 2 to perform the combustion hot water supply operation. Therefore, when the hot water supply system 2 supplies hot water thereafter, the hot water supply system 2 executes a non-combustion hot water supply operation or a combustion hot water supply operation according to the temperature of the water stored in the tank 30. After step S44, the controller ends the process of FIG. 2 and performs a normal operation.

  The controller may execute the process shown in FIG. 3 instead of the process shown in FIG. The process shown in FIG. 3 is almost the same as the process shown in FIG. 2, but the processes in steps S46 and S48 in FIG. 3 are executed instead of the processes in steps S2 and S4 in FIG.

  In step S <b> 46, the controller reads from the nonvolatile memory 75 the power consumption (also referred to as the last power consumption) in the hot water supply system 2 immediately before the power supply from the power supply unit 9 stops.

  In step S48, the controller determines whether or not the previous power consumption acquired from the nonvolatile memory 75 is a predetermined value (for example, 650 W) or more. If the supply source of power supplied from the power supply unit 9 to the hot water supply system 2 is the storage battery 104, when the power consumption in the hot water supply system 2 exceeds a predetermined value, the protection circuit of the storage battery 104 is activated to supply power. The power supply from the unit 9 is stopped. On the other hand, when the power supply source supplied from the power supply unit 9 to the hot water supply system 2 is the commercial power supply 108, the power from the power supply unit 9 is obtained even if the power consumption in the hot water supply system 2 exceeds a predetermined value. Supply will not be stopped. Therefore, in the hot water supply system 2 of the present embodiment, when the immediately preceding power consumption acquired from the nonvolatile memory 75 is equal to or greater than a predetermined value, the supply source of the electric power supplied from the power supply unit 9 to the hot water supply system 2 is the storage battery 104. Judge that there is. Further, when the power consumption immediately before acquired from the nonvolatile memory 75 is less than the predetermined value, it is determined that the supply source of the power supplied from the power supply unit 9 to the hot water supply system 2 is the commercial power source 108.

  Note that, for example, in the summer, when the hot water supply system 2 does not need to supply a large amount of heat, even if the storage battery 104 is a power supply source, the power consumption in the hot water supply system 2 is small and the protection circuit does not operate. Sometimes. In this case, in the process shown in FIG. 2, it may not be possible to accurately determine whether or not the power supply source is the storage battery 104. Therefore, instead of the process shown in FIG. 2, step S50 is added between step S4 and step S6 as in the process shown in FIG. 4, and in step S50, the controller temporarily changes the power consumption of hot water supply system 2. You may make it strengthen. In this case, if the power supply source is the storage battery 104, the protection circuit of the storage battery 104 is activated by increasing the power consumption of the hot water supply system 2 in step S50, and the power supply from the power supply unit 9 is performed. Stops. Thereafter, when the power supply from the power supply unit 9 is resumed, the energization duration time stored in the nonvolatile memory 75 is short, so the controller determines that the power supply source is the storage battery 104. On the other hand, when the power supply source is the commercial power supply 108, the power supply from the power supply unit 9 does not stop even if the power consumption of the hot water supply system 2 is increased in step S50. In this case, the controller determines that the power supply source is the commercial power supply 108, and directly executes the processing from step S6.

  Similarly, instead of the process shown in FIG. 3, as in the process shown in FIG. 5, step S50 is added between step S48 and step S6, and in step S50, the controller temporarily reduces the power consumption of hot water supply system 2. You may make it strengthen. In this case, if the power supply source is the storage battery 104, the protection circuit of the storage battery 104 is activated by increasing the power consumption of the hot water supply system 2 in step S50, and the power supply from the power supply unit 9 is performed. Stops. After that, when the power supply from the power supply unit 9 is resumed, the immediately preceding power consumption stored in the nonvolatile memory 75 is equal to or greater than a predetermined value, so the controller determines that the power supply source is the storage battery 104. . On the other hand, when the power supply source is the commercial power supply 108, the power supply from the power supply unit 9 does not stop even if the power consumption of the hot water supply system 2 is increased in step S50. In this case, the controller determines that the power supply source is the commercial power supply 108, and directly executes the processing from step S6.

  In addition, as long as it is possible to operate the protection circuit of the storage battery 104, the temporary increase of the power consumption in the hot water supply system 2 in the above step S50 may be performed by any method. For example, the power consumption of the hot water supply system 2 may be temporarily increased by performing the boiling operation with the heating capacity of the HP unit 4 being maximized. Alternatively, when the HP unit 4, the tank unit 6, and the burner unit 8 include heaters (not shown) (for example, heaters for preventing freezing of piping), the power consumption of the hot water supply system 2 can be achieved by energizing those heaters. May be temporarily increased.

  Note that the user may be able to select whether or not to execute the determination process as shown in FIGS. In this case, if the remote control 76 is selected to execute the determination process, the controller starts the power supply from the power supply unit 9 from the state where the power supply from the power supply unit 9 is stopped. Sometimes the determination process described above is performed. When the remote controller 76 does not select execution of the determination process, the controller starts power supply from the power supply unit 9 from a state where power supply from the power supply unit 9 is stopped. However, the normal operation is performed without executing the above determination process. In addition, the user may be able to instruct interruption of the determination process with the remote controller 76 while the determination process as shown in FIGS. In this case, when the remote control 76 instructs the interruption of the determination process, the controller stops the determination process and returns to the normal operation.

  In the determination processing of FIG. 2 to FIG. 5 described above, the contents of the processing being executed may be displayed on the remote controller 76. For example, a configuration may be adopted in which “gas prohibition” is displayed on the remote controller 76 after the combustion hot water supply operation is prohibited in step S14 or step S36 until the combustion hot water supply operation is allowed in step S20 or step S44. And / or it is good also as a structure which displays "HP capability maximum" on the remote control 76, while setting the heating capability of the HP unit 4 to the maximum heating capability by step S16. And / or while the heating capability of the HP unit 4 is set to the suppression heating capability in step S40, the remote controller 76 may display “HP capability suppression”.

  In the determination processing of FIG. 2 to FIG. 5 described above, a determination result regarding the type of power supply may be displayed on the remote controller 76. Similarly, in the processing of FIG. 2 to FIG. 5 described above, a determination result regarding the presence or absence of fuel gas supply may be displayed on the remote controller 76.

  In the determination processes of FIGS. 2 and 4 above, the power supply source is either the commercial power supply 108 or the storage battery 104 based on the duration of the power supply until immediately before the power supply from the power supply unit 9 stops. Judging. Unlike this, for example, every time the power supply from the power supply unit 9 resumes from the state where the power supply from the power supply unit 9 is stopped, the controller sets the start time of the power supply from the power supply unit 9. When the storage of the non-volatile memory 75 and the resumption of power supply from the power supply unit 9 is performed a predetermined number of times (for example, twice) or more during a predetermined time (for example, 24 hours), the controller You may comprise so that it may determine with the supply source of electric power being the storage battery 104. FIG.

  As described above, the hot water supply system 2 (an example of a heat source device) of the present embodiment includes a HP unit 4 (an example of an electric heat source device) that consumes electric power and heats water (an example of a heat medium), and a non-volatile type. A controller (an example of a control device) including a memory 75 is provided. The hot water supply system 2 is configured to operate by being supplied with electric power from a commercial power source 108 or a storage battery 104 having different power supply states. The controller is configured to store the supply status of power to the hot water supply system 2 in the nonvolatile memory 75 while power is supplied from the power source. As shown in FIGS. 2 to 5, when the power supply from the power source is started from the state where the power supply from the power source is stopped, the controller changes to the power supply state stored in the nonvolatile memory 75. Based on this, it is configured to determine whether the resumed power supply is the commercial power supply 108 or the storage battery 104.

  As shown in FIGS. 3 and 5, in the hot water supply system 2 of the present embodiment, the power supply status to the hot water supply system 2 includes the power consumption in the hot water supply system 2.

  As shown in FIGS. 2 and 4, in the hot water supply system 2 of the present embodiment, the power supply status to the hot water supply system 2 includes the duration of power supply to the hot water supply system 2.

  As shown in FIGS. 4 and 5, in the hot water supply system 2 of the present embodiment, the controller increases the power consumption in the hot water supply system 2 when it is not determined that the resumed power supply is the storage battery 104. It is configured as follows.

  The hot water supply system 2 of the present embodiment further includes a burner 80 (an example of a fuel type heat source machine) that consumes fuel gas (an example of fuel) and heats water. As shown in FIG. 2 to FIG. 5, when the power supply from the power source is started from the state where the power supply from the power source is stopped, the controller performs water heating by the burner 80 to the burner 80. It is configured to determine whether or not the fuel gas is supplied.

  Each embodiment has been described in detail above, but these are merely examples and do not limit the scope of the claims. The technology described in the claims includes various modifications and changes of the specific examples illustrated above.

  The technical elements described in this 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 exemplified in this specification or the drawings achieves a plurality of objects at the same time, 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 20: Return thermistor 22: Outward thermistor 23 : Outside temperature thermistor 24: HP controller 30: Tank 32: Mixing valve 34: Bypass control valve 36: Upper thermistor 37: Intermediate thermistor 38: Lower thermistor 40: Water supply path 42: Pressure reducing valve 44: Inlet thermistor 46: Tank water supply path 48: Tank bypass path 50: Check valve 52: Check valve 54: Water side water quantity sensor 56: Tank hot water path 58: Check valve 60: Hot water side water quantity sensor 62: First hot water supply path 64: Mixing thermistor 66: First 2 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 control 80: Burner 81: Gas supply pipe 82: Heat exchanger 84: Bypass servo 86: Water quantity servo 88: Hot water valve 90: Burner forward path 91: Water quantity sensor 92: Burner Return path 94: Burner bypass path 96: Burner hot water supply thermistor 98: Hot water path 100: Burner controller 102: Distribution board 104: Storage battery 106: Switch 108: Commercial power supply

Claims (5)

An electric heat source machine that consumes electric power and heats the heat medium;
A heat source device comprising a control device comprising a non-volatile memory,
It is configured to operate with power supplied from a power source that is a commercial power source or a storage battery with different power supply states,
The control device is configured to store the supply status of power to the heat source device in the nonvolatile memory while power is supplied from the power source.
When the power supply from the power supply is started after the power supply from the power supply is stopped, the control device restarts the power supply based on the power supply status stored in the nonvolatile memory. A heat source device configured to determine whether the power source is a commercial power source or a storage battery.   The heat source device according to claim 1, wherein the supply status of power to the heat source device includes power consumption in the heat source device.   The heat source device according to claim 1, wherein the supply status of power to the heat source device includes a duration of power supply to the heat source device.   4. The heat source device according to claim 1, wherein the control device is configured to increase power consumption in the heat source device when it is not determined that the resumed power supply is a storage battery. 5. . It further comprises a fuel-type heat source machine that consumes fuel and heats the heat medium,
When the power supply from the power source is started after the power supply from the power source is stopped, the control device performs heating of the heat medium by the fuel type heat source unit and supplies the fuel to the fuel type heat source unit. The heat source device according to any one of claims 1 to 4, wherein the heat source device is configured to determine presence or absence.

Images