JP6647020B2 - Hot water supply system - Google Patents

Description

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

  The hot water supply system disclosed in Patent Literature 1 includes a heat pump that heats water and a tank that stores the water heated by the heat pump. The hot water supply system is installed in a house, and the heat pump and the tank are both located outdoors. A first distribution board and a second distribution board for supplying electric power to the heat pump and the tank are arranged indoors. The heat pump and the first distribution board are electrically connected by a first wiring system, and the tank and the second distribution board are electrically connected by a second wiring system.

JP 2011-163599 A

  In the hot water supply system of Patent Document 1, when an outdoor heat pump and a tank are electrically connected to a first distribution board and a second distribution board indoors, wiring work for connecting indoors and outdoors to lay a wiring system. Is required. Since the wiring work of both the first wiring system and the second wiring system is required, the work is troublesome.

  In order to reduce the trouble of wiring work, it is conceivable to use a single distribution board and install an outdoor outlet, and connect the indoor distribution board and the outdoor outlet with a separate wiring system. Then, the outdoor outlet and the heat pump may be connected by a first wiring system, and the outdoor outlet and the tank may be connected by a second wiring system. As a result, only the work for connecting the indoor distribution board and the outdoor outlet is required, and the wiring work for laying the first wiring system and the second wiring system is not required. Electric power is supplied from the outdoor outlet to the heat pump and the tank via the first wiring system and the second wiring system.

  However, in this configuration, electric power is supplied from the outdoor outlet to both the heat pump and the tank, so that the current flowing through the outdoor outlet increases. Therefore, the distribution board may cut off the current in order to prevent an excessive current from flowing to the outdoor outlet. Then, power supply may be interrupted even though power supply to the heat pump and the tank is required.

  Therefore, the present specification provides a technique capable of suppressing interruption of power supply.

The hot water supply system disclosed in this specification is installed in a house having an outdoor outlet installed outdoors. The hot water supply system includes a heat pump unit that is installed outdoors and includes a heat pump that heats water, a tank unit that is installed outdoors and includes a tank that stores water heated by the heat pump, and a water supply system that is installed outdoors. And a control unit. The heat pump unit and the outdoor outlet are electrically connected by a first wiring system, and the gas heat source unit, the tank unit and the outdoor outlet are electrically connected by a second wiring system. Control means determines a suppression power consumption becomes higher increases small power or gas heat source unit of the tank unit, as the power consumption of the heat pump unit is equal to or less than the suppression power, controls the operation of the heat pump.

According to such a configuration, electric power is supplied from the outdoor outlet to the heat pump unit, the tank unit, and the gas heat source unit via the first wiring system and the second wiring system. At this time, the control unit controls the operation of the heat pump so that the power consumption of the heat pump unit is equal to or less than the suppression power according to the power consumption of the tank unit and the power consumption of the gas heat source unit . The power consumption of the entire hot water supply system including the gas heat source unit can be suppressed. As a result, electric power supplied from the outdoor outlet to the heat pump unit, the tank unit, and the gas heat source unit is suppressed. Therefore, when the outdoor outlet is connected to the distribution board, it is possible to suppress an excessive current from flowing from the distribution board to the outdoor outlet, and the distribution board cuts off the current flowing to the outdoor outlet. Can be suppressed. This can prevent the power supply to the heat pump unit, the tank unit, and the gas heat source unit from being interrupted.

It is a figure showing typically the composition of the hot water supply system concerning an example. It is a figure which shows typically the structure of the distribution board which concerns on an Example. It is a figure showing typically the composition of the hot water supply system concerning an example.

  As shown in FIG. 1, a hot water supply system 1 according to the embodiment is installed in a house 100. The hot water supply system 1 includes a heat pump unit 4, a tank unit 3, and a gas heat source unit 5.

  The house 100 has a wall 103 separating an indoor 101 and an outdoor 102. The house 100 includes a distribution board 2 and an outdoor outlet 6. A distribution board 2 is installed indoors 101, and an outdoor outlet 6 is installed outdoors 102. The distribution board 2 is installed inside the wall 103, and the outdoor outlet 6 is installed outside the wall 103. The distribution board 2 and the outdoor outlet 6 are electrically connected by an outlet wiring 15. The outlet wiring 15 penetrates through the wall 103 and is connected to the distribution board 2 and the outdoor outlet 6. For example, the outlet wiring 15 is connected to the distribution board 2 and the outdoor outlet 6 by forming a through hole in the wall 103 and performing wiring work to insert the outlet wiring 15 into the through hole.

  The distribution board 2 is electrically connected to a commercial power supply 10. Electric power is supplied to the house 100 from the power system via the commercial power supply 10. As shown in FIG. 2, the distribution board 2 includes one main breaker 21 and a plurality of branch breakers 22. The commercial power supply 10 and the main breaker 21 are electrically connected by a power supply wiring 23. The main breaker 21 and the plurality of branch breakers 22 are electrically connected by a branch wiring 24. One of the plurality of branch breakers 22 (outlet branch breaker 22 a) and the outdoor outlet 6 are electrically connected by the outlet wiring 15. The other branch breakers 22 and terminal equipment (not shown) are electrically connected by terminal wiring 25.

  The main breaker 21 has a function of cutting off a current flowing from the power supply wiring 23 to the branch wiring 24 when the current exceeds a predetermined threshold value. The outlet branch breaker 22a has a function of cutting off the current when the current flowing from the branch wiring 24 to the outlet wiring 15 exceeds a predetermined threshold. Each of the other branch breakers 22 has a function of cutting off the current when the current flowing from the branch wiring 24 to each terminal wiring 25 exceeds a predetermined threshold.

  The outdoor outlet 6 is configured so that at least two plugs can be inserted and removed. Electric power (for example, the heat pump unit 4, the tank unit 3, and the gas heat source unit 5) is supplied from the outdoor outlet 6 via a plug. As shown in FIG. 1, the heat pump unit 4 and the outdoor outlet 6 are electrically connected by a first wiring system 11. The tank unit 3, the gas heat source unit 5 and the outdoor outlet 6 are electrically connected by a second wiring system 12. The plug of the first wiring system 11 and the plug of the second wiring system 12 are inserted into the outdoor outlet 6.

  Each wiring system may include a plurality of power lines. In the example shown in FIG. 1, the second wiring system 12 includes two power lines 12a and 12b. The outdoor outlet 6 and the gas heat source unit 5 are connected by the power line 12a, and the gas heat source unit 5 and the tank unit 3 are connected by the power line 12b. The first wiring system 11 includes one power line 11a. The outdoor outlet 6 and the heat pump unit 4 are connected by the power line 11a.

  As shown in FIG. 3, the heat pump unit 4 includes a heat pump 40. The heat pump 40 is a heat source that heats water by absorbing heat from the outside air. The heat pump 40 includes a compressor 41, a condenser 42, an expansion valve 43, and an evaporator 44. The compressor 41 pressurizes the refrigerant to a high temperature and a high pressure. The condenser 42 cools the refrigerant by exchanging heat with water. The expansion valve 43 decompresses the refrigerant to a low temperature and low pressure. The evaporator 44 heats the refrigerant by heat exchange with the outside air. The heat pump 40 heats water by absorbing heat from outside air by circulating a refrigerant (for example, a CFC-based refrigerant) in the order of the compressor 41, the condenser 42, the expansion valve 43, and the evaporator 44. The heat pump unit 4 further includes a circulation pump 45 that circulates water through the condenser 42, a return thermistor 46 that detects the temperature of the water flowing into the condenser 42, and a forward thermistor 47 that detects the temperature of the water flowing out of the condenser 42. , An outside air temperature thermistor 48 for detecting the outside air temperature, and a heat pump controller 203 for controlling the operation of each component of the heat pump unit 4.

  The tank unit 3 includes a tank 30, a mixing valve 32, and a bypass control valve. The tank 30 is a closed container whose outside is covered with a heat insulating material and stores water inside. The tank 30 stores the water heated by the heat pump 40. When the circulation pump 45 of the heat pump unit 4 is driven, water is sucked from the bottom of the tank 30 and sent to the condenser 42. The water heated to a high temperature by the condenser 42 is returned into the tank 30 from the top of the tank 30. When the water heated by the heat pump 40 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 tank 30 is provided with an upper thermistor 36 for detecting the temperature of the upper water, an intermediate thermistor 37 for detecting the temperature of the intermediate water, and a lower thermistor 38 for detecting the temperature of the lower water.

  Tap water is supplied to the tank unit 3 via a water supply path 71. The water supply path 71 is provided with a pressure reducing valve 73 for reducing the pressure of the water supply and a water input thermistor 75 for detecting the temperature of the water supply. The water supply path 71 branches into a tank water supply path 77 communicating with the bottom of the tank 30 and a tank bypass path 79 communicating with the mixing valve 32. Check valves 51 and 52 are attached to the tank water supply path 77 and the tank bypass path 79, 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 79. 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 and a hot water amount sensor 60 for detecting the flow rate of water from the tank 30 flowing into the mixing valve 32 are attached to the tank outlet path 56.

  The mixing valve 32 mixes the tap water flowing from the tank bypass path 79 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 degree on the tank bypass path 79 side (opening degree on the water side) and the opening degree on the tank tapping path 56 side (opening degree 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.

  From the tank unit 3, 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. 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. A bypass control valve 34 is attached to the hot water supply bypass path 72.

  Each path of the tank unit 3 is provided with an electric anti-freezing heater 57a to 57g. The water supply path 71 is provided with an antifreeze heater 57a, the tank water supply path 77 is provided with an antifreeze heater 57b, and the tank hot water supply path 56 is provided with an antifreeze heater 57c. The tank bypass path 79 is provided with an antifreeze heater 57d, the first hot water supply path 62 is provided with an antifreeze heater 57e, and the hot water supply bypass path 72 is provided with an antifreeze heater 57f. The second hot water supply path 66 is provided with a freeze prevention heater 57g. Further, the tank unit 3 includes an outside air temperature thermistor 59 for detecting the outside air temperature.

  The tank unit 3 further includes a tank controller 201 and a remote controller 202 that can communicate with the tank controller 201. The tank controller 201 controls the operation of each component of the tank unit 3. The remote controller 202 receives various operation inputs from the user via switches, buttons, and the like. In addition, remote controller 202 notifies the user of various information related to the setting and operation of hot water supply system 1 by display and sound.

  The gas heat source unit 5 includes a gas heat source unit 50. The gas heat source device 50 includes a burner 80 and a heat exchanger 82. Further, the gas heat source unit 5 includes a bypass servo 84, a water amount servo 86, and a hot water valve 88. The burner 80 is a heat source that heats water flowing through the heat exchanger 82 by burning gas. Water from the first hot water supply path 62 of the tank unit 3 flows into the heat exchanger 82 via the burner outward 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 3 via the burner return path 92. A water amount servo 86 for adjusting the flow rate of water flowing into the heat exchanger 82 is 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 gas heat source unit 5, hot water is supplied to a bathtub as a hot water supply point via a hot water path 98.

  Each path of the gas heat source unit 5 is provided with electric anti-freezing heaters 93a to 93f. An anti-freezing heater 93a is provided in the burner outward path 90 upstream of the water volume servo 86, and an anti-freezing heater 93b is provided in the burner outward path 90 downstream of the bypass servo 84. Is provided with a freeze prevention heater 93c, a burner return path 92 is provided with freeze prevention heaters 93d and 93e, and a hot water path 98 is provided with a freeze prevention heater 93f. Further, the gas heat source unit 5 includes an outside air temperature thermistor 95 for detecting the outside air temperature. The gas heat source unit 5 further includes a gas heat source controller 204 for controlling the operation of each component of the gas heat source unit 5.

  The heat pump controller 203 and the tank controller 201 can communicate with each other. The tank controller 201 and the gas heat source device controller 204 can communicate with each other. Therefore, the heat pump controller 203, the tank controller 201, and the gas heat source device controller 204 perform control in cooperation with each other, so that the hot water supply system 1 can perform various operations such as a boiling operation, a hot water supply operation, and an antifreezing operation. it can. Hereinafter, the heat pump controller 203, the tank controller 201, and the gas heat source device controller 204 may be collectively simply referred to as a controller.

  Hot water supply system 1 having the above configuration performs a boiling operation, a hot water supply operation, and an antifreezing operation. In the boiling operation, the hot water supply system 1 drives the heat pump unit 4 to boil water in the tank 30. When the boiling operation is started, the controller drives the compressor 41 to circulate the refrigerant in the order of the compressor 41, the condenser 42, the expansion valve 43, and the evaporator 44, and drives the circulation pump 45. , Water is circulated between the tank 30 and the condenser 42. Thereby, the water sucked from the bottom of the tank 30 is heated to the boiling temperature in the condenser 42 and returned to the top of the tank 30. When all the water in the tank 30 has been replaced with the water heated to the boiling temperature, the controller ends the boiling operation.

  In the hot water supply operation, the hot water supply system 1 supplies water at a set hot water supply temperature to a hot water supply point. In the hot water supply system 1 of the present embodiment, for example, when the water amount (hot water amount) obtained by adding the water amount detected by the water side water amount sensor 54 and the water amount detected by the hot side water amount sensor 60 is equal to or more than a predetermined value. Start the hot water supply operation.

  When the hot water supply operation is started, the controller determines whether or not the temperature detected by the upper thermistor 36 of the tank 30 is equal to or higher than the hot water supply set temperature. When the temperature detected by the upper thermistor 36 is equal to or higher than the hot water supply set temperature, the controller prohibits the combustion operation of the burner 80 and sets the mixing valve so that the temperature detected by the mixing thermistor 64 becomes the hot water supply set temperature. Adjust the opening of 32. In this case, high-temperature water supplied from the upper part of the tank 30 and low-temperature tap water supplied from the water supply path are mixed at the mixing valve 32 so as to reach the hot water supply set temperature, and supplied to the hot water supply point.

  When the temperature detected by the upper thermistor 36 of the tank 30 is lower than the hot water supply set temperature, the controller permits the burner 80 to perform the combustion operation, and the temperature detected by the mixing thermistor 64 is slightly lower than the hot water supply set temperature. The opening of the mixing valve 32 is adjusted so that the temperature becomes low. In this case, the high-temperature water supplied from the upper part of the tank 30 and the low-temperature tap water supplied from the water supply path are mixed in the mixing valve 32, and then heated to the hot water supply set temperature by the burner 80. Supplied to

  In the hot water supply system 1 of the present embodiment, for example, when the water amount (hot water amount) obtained by adding the water amount detected by the water side water amount sensor 54 and the water amount detected by the hot side water amount sensor 60 falls below a predetermined value, It is determined that the hot water supply has been completed. When the hot water supply ends, the controller prohibits the combustion operation of the burner 80 and ends the hot water supply operation process.

  When the outside air temperature is low such as in winter, water may freeze inside the piping. If water freezes inside the pipe, the boiling operation and the hot water supply operation may not be performed. Therefore, hot water supply system 1 executes an antifreezing operation for preventing freezing of water. In the anti-freezing operation, when the outside air temperature detected by the outside air temperature thermistor 48 of the heat pump unit 4 is lower than a predetermined temperature, the heat pump controller 203 drives the circulation pump 45 for a predetermined period of time, so that the tank 30 and the condenser 42 Circulate water between. Thereby, the water in the tank 30 circulates between the tank 30 and the condenser 42 to prevent the circulation path from freezing. Thereafter, when the outside air temperature detected by the outside air temperature thermistor 48 becomes higher than a predetermined temperature, the heat pump controller 203 ends the freeze prevention operation of the heat pump unit 4.

  Further, when the outside air temperature detected by the outside air temperature thermistor 59 of the tank unit 3 is lower than the predetermined temperature, the tank controller 201 turns on the anti-freezing heaters 57a to 59g for a predetermined time to connect each path of the tank unit 3 to each other. Heat. Thereby, the water in each path of the tank unit 3 is heated to prevent freezing. Thereafter, when the outside air temperature detected by the outside air temperature thermistor 59 becomes higher than the predetermined temperature, the tank controller 201 ends the freezing prevention operation of the tank unit 3.

  When the outside air temperature detected by the outside air temperature thermistor 95 of the gas heat source unit 5 is lower than the predetermined temperature, the gas heat source controller 204 turns on the antifreeze heaters 93a to 93f for a predetermined time, and the gas heat source unit Each path of the unit 5 is heated. Thereby, the water in each path of the gas heat source unit 5 is heated to prevent freezing. Thereafter, when the outside air temperature detected by the outside air temperature thermistor 95 becomes higher than the predetermined temperature, the gas heat source unit controller 204 ends the freezing prevention operation of the gas heat source unit 5.

  In the above hot water supply system 1, each of the heat pump unit 4, the tank unit 3, and the gas heat source unit 5 consumes electric power. The gas heat source controller 204 calculates the power consumption of the gas heat source unit 5. The gas heat source device controller 204 transmits the calculated power consumption of the gas heat source device unit 5 to the tank controller 201. The tank controller 201 calculates the power consumption of the tank unit 3. The tank controller 201 transmits the calculated power consumption of the tank unit 3 to the heat pump controller 203. Further, the tank controller 201 transmits the power consumption of the gas heat source unit 5 received from the gas heat source unit controller 204 to the heat pump controller 203.

  The heat pump controller 203 calculates the suppression power based on the power consumption of the tank unit 3 and the power consumption of the gas heat source unit 5. The heat pump controller 203 controls the operation of the heat pump 40 such that the power consumption of the heat pump unit 4 is equal to or less than the suppression power according to the power consumption of the tank unit 3 and the power consumption of the gas heat source unit 5. For example, when the power consumption of the tank unit 3 is large, the heat pump controller 203 controls the operation of the heat pump 40 so that the power consumption of the heat pump unit 4 becomes small. Alternatively, when the power consumption of the gas heat source unit 5 is large, the heat pump controller 203 controls the operation of the heat pump 40 so that the power consumption of the heat pump unit 4 becomes small. The heat pump controller 203 controls the power consumption of the heat pump unit 4 to be equal to or less than the suppression power. Thereby, the power consumption of the entire hot water supply system 1 is suppressed.

  The configuration and operation of the hot water supply system 1 according to the present embodiment have been described above. As is clear from the above description, the hot water supply system 1 of the present embodiment is installed in a house 100 having an outdoor outlet 6 installed outdoors 102 as shown in FIG. The hot water supply system 1 includes a heat pump unit 4 including a heat pump 40 for heating water, a tank unit 3 including a tank 30 for storing water heated by the heat pump 40, and a controller (an example of a control unit). The heat pump unit 4 and the tank unit 3 are installed outside 102. The heat pump unit 4 and the outdoor outlet 6 are electrically connected by a first wiring system 11, and the tank unit 3 and the outdoor outlet 6 are electrically connected by a second wiring system 12. The controller controls the operation of the heat pump 40 so that the power consumption of the heat pump unit 4 is equal to or less than the suppression power according to the power consumption of the tank unit 3.

  According to such a configuration, electric power is supplied from the outdoor outlet 6 to the heat pump unit 4 and the tank unit 3 via the first wiring system 11 and the second wiring system 12. At this time, since the controller controls the operation of the heat pump 40 so that the power consumption of the heat pump unit 4 is equal to or less than the suppression power corresponding to the power consumption of the tank unit 3, the power consumption of the heat pump unit 4 and the consumption of the tank unit 3 are reduced. It is possible to suppress the power consumption of the entire hot water supply system 1 with the combined power. As a result, electric power supplied from the outdoor outlet 6 to the heat pump unit 4 and the tank unit 3 is suppressed. Thereby, the current flowing from the distribution board 2 to the hot water supply system 1 via the outdoor outlet 6 can be suppressed.

  The distribution board 2 has a function of interrupting an excessive current. However, according to the above configuration, the current flowing from the distribution board 2 to the hot water supply system 1 via the outdoor outlet 6 can be suppressed, so that the distribution board 2 can be prevented from interrupting the current. As a result, interruption of power supply from the outdoor outlet 6 to the heat pump unit 4 and the tank unit 3 can be suppressed.

  Further, the hot water supply system 1 of this embodiment includes a gas heat source unit 5 including a gas heat source unit 50 for heating water. The gas heat source unit 5, the tank unit 3, and the outdoor outlet 6 are electrically connected by a second wiring system 12. The controller controls the operation of the heat pump 40 so that the power consumption of the heat pump unit 4 is equal to or less than the suppression power according to the power consumption of the tank unit 3 and the power consumption of the gas heat source unit 5.

  According to such a configuration, electric power supplied from the outdoor outlet 6 to the heat pump unit 4, the tank unit 3, and the gas heat source unit 5 is suppressed. Thereby, similarly to the above, it is possible to prevent the power supply to the heat pump unit 4, the tank unit 3, and the gas heat source unit 5 from being interrupted.

  Further, according to the above configuration, it is possible to supply power to the heat pump unit 4 and the tank unit 3 simply by connecting the first wiring system 11 and the second wiring system 12 to the outdoor outlet 6, so that the first wiring system Extensive wiring work for laying the 11 and the second wiring system 12 is not required. For example, it is not necessary to form a through hole in the wall 103 of the house 100 for the first wiring system 11 and the second wiring system 12 and connect the indoor 101 and the outdoor 102. Therefore, labor for wiring work can be saved.

  As mentioned above, although one Example was described, the specific aspect is not limited to the said Example. In the hot water supply system 1 according to another embodiment, the maximum power supplied to the heat pump unit 4, the tank unit 3, and the gas heat source unit 5 from the outdoor outlet 6 can be set by the remote controller 202 (an example of a setting unit). That is, the maximum power that can be used by the entire heat pump unit 4, the tank unit 3, and the gas heat source unit 5 can be set. This power can be set in multiple stages. The user operates the remote controller 202 to set the power supplied from the outdoor outlet 6. The controller sets the suppression power of the heat pump unit 4 so that the power supplied from the outdoor outlet 6 is equal to or less than the power set by the remote controller 202. That is, the controller controls the operation of the heat pump 40 such that the power consumption of the entire heat pump unit 4, the tank unit 3, and the gas heat source unit 5 is equal to or less than the power set by the remote controller 202.

  According to such a configuration, since the user can set the power supplied from the outdoor outlet 6, the power consumption of the hot water supply system 1 can be suppressed based on the user's intention.

  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. 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.

1: Hot water supply system 2: Distribution board 3: Tank unit 4: Heat pump unit 5: Gas heat source unit 6: Outdoor outlet 10: Commercial power supply 11: First wiring system 11a: Power line 12: Second wiring system 12a: Power line 12b : Power line 15: Outlet wiring 21: Main breaker 22: Branch breaker 22a: Outlet branch breaker 23: Power supply wiring 24: Branch wiring 25: Terminal wiring 30: Tank 32: Mixing valve 34: Bypass control valve 36: Upper thermistor 37: Middle thermistor 38: Lower thermistor 40: Heat pump 41: Compressor 42: Condenser 43: Expansion valve 44: Evaporator 45: Circulation pump 46: Return thermistor 47: Outgoing thermistor 48: Outside air temperature thermistor 50: Gas heat source unit 51: Check valve 52: Check valve 54: Water side water Sensor 56: Tank hot water supply path 57a-g: Freezing prevention heater 58: Check valve 59: Outside air temperature thermistor 60: Hot water side water sensor 62: First hot water supply path 64: Mixing thermistor 66: Second hot water supply path 68: Hot water supply thermistor 70: check valve 71: water supply path 72: hot water supply bypass path 73: pressure reducing valve 75: water input thermistor 77: tank water supply path 79: tank bypass path 80: burner 82: heat exchanger 84: bypass servo 86: water volume servo 88: Valve 90: Burner outward path 92: Burner return path 93a-g: Freezing prevention heater 94: Burner bypass path 95: Outside air temperature thermistor 96: Burner hot water supply thermistor 98: Hot water path 100: House 101: Indoor 102: Outdoor 103: Wall 201: Tank controller 202: Remote controller 203: Heat pump Controller 204: gas heat source machine controller

Claims (1)

A hot water supply system installed in a house having an outdoor outlet installed outdoors,
A heat pump unit that is installed outdoors and includes a heat pump that heats water,
A tank unit that is installed outdoors and includes a tank that stores water heated by the heat pump,
A gas heat source unit that is installed outdoors and includes a gas heat source unit that heats water,
Control means,
The heat pump unit and the outdoor outlet are electrically connected by a first wiring system,
The gas heat source unit, the tank unit, and the outdoor outlet are electrically connected by a second wiring system,
Said control means, said determining the inhibitory power consumption becomes higher increases less power consumption or the gas heat source unit of the tank unit, as power consumption of the heat pump unit is equal to or less than the restraining power, the heat pump A hot water supply system that controls operation.

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