JP6012530B2 - Hot water storage water heater - Google Patents

Description

  The present invention relates to a hot water storage type hot water supply apparatus that heats hot water in a hot water storage tank by a heat pump.

  Conventionally, a hot water storage type hot water supply apparatus is known in which hot water stored in a hot water storage tank is heated by heat pumped from outside air by a heat pump (see, for example, Patent Document 1). In the hot water storage type hot water supply apparatus described in Patent Document 1, the heat pump is exclusively used for heating hot water in the hot water storage tank.

Japanese Patent No. 3867547

  In the hot water storage type hot water supply apparatus, the heat pump operates only when the hot water in the hot water storage tank runs out (so-called hot water out condition) and the water in the hot water storage tank is boiled to a predetermined temperature. And since the water in the hot water storage tank is generally boiled in the midnight hours when the electricity bill is cheaper than during the daytime, the operating rate of the heat pump during the daytime is particularly low and Utilization of a good heat pump was insufficient.

  This invention is made | formed in view of the said background, and it aims at providing the hot water storage type hot-water supply apparatus which can improve the operation rate of a heat pump and can utilize a heat pump more effectively.

The present invention has been made to achieve the above object, and the hot water storage type hot water supply apparatus of the present invention includes:
A hot water storage unit having a hot water storage tank and a tank circulation path having both ends communicating with the hot water storage tank;
A tank circulation pump that circulates hot water in the hot water storage tank through the tank circulation path, a refrigerant circulation circuit in which refrigerant is sealed, and a refrigerant that is provided in the middle of the refrigerant circulation circuit and circulates through the refrigerant circulation circuit A compressor that compresses, a first expansion valve that is provided in the middle of the refrigerant circulation circuit and expands the refrigerant flowing through the refrigerant circulation circuit, and between the compressor and the first expansion valve of the refrigerant circulation circuit A tank heat exchanger that is connected to the tank circulation path and exchanges heat between the refrigerant flowing through the refrigerant circulation circuit and hot water flowing through the tank circulation path, and the refrigerant circulation circuit outside the tank. Outdoor heat exchange that is provided on the side where the tank heat exchanger between the compressor and the first expansion valve is not provided, and performs heat exchange between the refrigerant flowing through the refrigerant circulation circuit and the outside air. With heat And the pump unit,
Both ends of the refrigerant circulation circuit communicate with different locations between the tank heat exchanger and the first expansion valve in the refrigerant circulation circuit, and an air-conditioning refrigerant circulation path in which refrigerant is enclosed, and in the middle of the air-conditioning refrigerant circulation path in the room An air conditioning unit having an indoor heat exchanger that is provided and performs heat exchange between the refrigerant flowing through the air conditioning refrigerant circulation path and indoor air;
An air-conditioning unit connection state in which refrigerant can be circulated between the refrigerant circuit and the air-conditioning refrigerant circuit, and refrigerant cannot be circulated between connection points of the refrigerant circuit to both ends of the air-conditioning refrigerant circuit. The refrigerant circulation circuit and the air conditioning refrigerant circulation path are not allowed to flow, and the refrigerant circulation between the connection points of the refrigerant circulation circuit with the air conditioning refrigerant circulation path is not connected. An air conditioning unit connection switching unit that switches between the states;
Hot water in the hot water storage tank is heated by the tank heat exchanger by operating the tank circulation pump, the compressor, and the first expansion valve with the air conditioning unit connection switching unit in the disconnected state. The single heat storage operation, the air conditioning unit connection switching unit is set to the air conditioning unit connected state, the tank circulation pump is stopped, the compressor and the first expansion valve are operated, and the outdoor heat exchanger is operated. And a controller that performs a heating operation for heating the room by performing heat exchange with the indoor heat exchanger ,
An auxiliary heat source device that is connected to the hot water storage tank and is provided in the middle of a hot water pipe supplied with hot water stored in the hot water storage tank, and that heats the hot water flowing through the hot water pipe;
The control unit performs a hot water supply operation for discharging hot water at a target hot water supply temperature from the hot water discharge pipe, and supplies the hot water storage tank from the hot water storage tank to the hot water discharge pipe when the hot water storage tank runs out when the heating operation is performed. When the hot water having the target hot water temperature cannot be obtained from the hot water to be used, the hot water supply operation is performed by operating the auxiliary heat source machine .

According to the present invention, by providing the air conditioning unit and the air conditioning unit connection switching unit, it is possible to circulate the refrigerant at high pressure and high temperature by the compressor from the refrigerant circulation circuit to the air conditioning refrigerant circulation path. . Therefore, the control unit can execute the heating operation when not performing the single heat storage operation, thereby increasing the operating rate of the heat pump unit and making the heat pump function of the heat pump unit more effective. It can be used for.
Further, according to the present invention, the control unit can continue the hot water supply operation by operating the auxiliary heat source unit even when the hot water storage tank is in a hot water out condition. Therefore, when the hot water storage tank is out of hot water, the auxiliary heat source is performed while the indoor air conditioning operation is performed by the heat pump unit with priority given to indoor air conditioning over boiling water in the hot water storage tank. The hot water supply operation can be executed by operating the machine.

  In addition, the division of the hot water storage unit, the heat pump unit, and the air conditioning unit in the present invention is functional, and does not necessarily mean that they are arranged in the same casing. For example, as for the tank circulation pump, in addition to the embodiment in which the tank circulation pump is disposed in a casing in which the compressor and the refrigerant circulation circuit are accommodated, the tank circulation in the casing in which the hot water storage tank is accommodated. Embodiments in which the pump is arranged are also included. In addition, the tank circulation pump is stopped when the tank circulation pump is maintained in a completely stopped state, and heat exchange between hot water and refrigerant in the tank heat exchanger is substantially performed. The case where the tank circulation pump is operated intermittently to the extent that it is not performed is also included.

A first delivery state in which the refrigerant compressed by the compressor is delivered to the tank heat exchanger side; and a second delivery state in which the refrigerant compressed by the compressor is delivered to the outdoor heat exchanger side. A destination switching unit for switching
The controller sets the air conditioning unit connection switching unit to the air conditioning unit connected state, sets the delivery destination switching unit to the second delivery state, stops the tank circulation pump, stops the compressor and the first By operating the expansion valve and performing heat exchange with the outdoor heat exchanger and the indoor heat exchanger, the single cooling operation for cooling the room is executed , and when the single cooling operation is executed, When hot water having a target hot water supply temperature cannot be obtained from hot water supplied from the hot water storage tank to the hot water discharge pipe due to running out of hot water in the hot water storage tank, the auxiliary heat source unit is operated to perform the hot water supply operation .

  According to this configuration, the heat pump unit is used even when there is no need to boil the hot water in the hot water storage tank by providing the destination switching unit and performing the single cooling operation by the control unit. Then, the room can be cooled by the indoor heat exchanger. Therefore, the operating rate of the heat pump unit can be increased and the heat pump function of the heat pump unit can be utilized more effectively.

Furthermore, according to this structure, the said control part can continue the said hot water supply operation by operating the said auxiliary heat source machine, even when the said hot water storage tank is a hot water out state. Therefore, when the hot water storage tank is a hot water out condition, than said hot water boiled up in the hot water storage tank, the air conditioning chamber is prioritized, while running alone cooling operation chamber by the heat pump unit, the The hot water supply operation can be executed by operating the auxiliary heat source machine.

The block diagram of the hot water storage type hot water supply apparatus (description figure of the operation state at the time of independent heat storage operation execution). Explanatory drawing of the operation state at the time of heating operation. Explanatory drawing of the operation state at the time of a thermal storage cooling operation. Explanatory drawing of the operation state at the time of a single cooling operation.

  An embodiment of the present invention will be described with reference to FIGS. Referring to FIG. 1, a hot water storage type hot water supply apparatus 1 according to the present embodiment includes a hot water storage unit 10, a heat pump unit 30, an air conditioning unit 50, and a controller 70. A remote controller 75 for remotely operating the hot water storage type hot water supply apparatus 1 is connected to the controller 70.

  The hot water storage unit 10 includes a hot water storage tank 11, a water supply pipe 13, a hot water pipe 14, an auxiliary heat source device 20 provided in the middle of the hot water pipe 14, and the like. The hot water storage tank 11 keeps hot water in the inside. The water supply pipe 13 has one end connected to the water supply and the other end connected to the lower part of the hot water storage tank 11 to supply water to the lower part of the hot water storage tank 11.

  A water supply bypass pipe 15 branched from the water supply pipe 13 communicates with a hot water discharge pipe 14 via a hot water supply mixing valve 16, and hot water and a water supply bypass pipe supplied from the hot water storage tank 11 to the hot water discharge pipe 14 by the hot water supply mixing valve 16. The mixing ratio with the water supplied from 15 to the tapping pipe 14 is changed.

  The hot water discharge pipe 14 has one end connected to a hot water tap 90 (such as a currant) and the other end connected to the upper portion of the hot water storage tank 11. Hot water stored in the upper part of the hot water storage tank 11 is supplied from the hot water discharge pipe 14 to the hot water tap 90. A hot water bypass pipe 17 that opens and closes the hot water bypass pipe 18 is provided in a hot water bypass pipe 18 that bypasses the auxiliary heat source device 20 and communicates the upstream hot water pipe 14 with the downstream hot water pipe 14.

  The auxiliary heat source device 20 includes a hot water supply heat exchanger 21 provided in the middle of the hot water pipe 14, a burner 22, and a hot water open / close valve 23 that opens and closes the hot water pipe 14. Hot water flowing through the hot water supply heat exchanger 21 is heated by the combustion exhaust of the burner 22. A tank circulation path 12 connected to the upper and lower parts of the hot water storage tank 11 is also provided.

  Next, the heat pump unit 30 is installed outdoors, and is connected to a compressor 41 and a first expansion valve connected by a refrigerant circulation circuit 40 in which a refrigerant (for example, alternative fluorocarbon such as hydrofluorocarbon (HFC), carbon dioxide, etc.) is enclosed. 42, a tank heat exchanger 43, an outdoor heat exchanger 44, a four-way valve 46 (corresponding to the destination switching unit of the present invention), and a three-way valve 32 (corresponding to the air conditioning unit connection switching unit of the present invention). Yes.

  The outdoor heat exchanger 44 exchanges heat between the air (outside air) supplied by the rotation of the outdoor fan 45 and the refrigerant flowing in the refrigerant circulation circuit 40. The compressor 41 compresses the refrigerant to a high temperature and high pressure. The first expansion valve 42 releases the pressure of the refrigerant pressurized by the compressor 41.

  The tank heat exchanger 43 is connected to the tank circulation path 12 and performs heat exchange between hot water flowing in the tank circulation path 12 and refrigerant flowing in the refrigerant circulation circuit 40. The tank circulation path 12 is provided with a tank circulation pump 31 for circulating hot water in the hot water storage tank 11 through the tank circulation path 12.

  The four-way valve 46 has four ports a to d. The first sending state (the state shown in FIG. 1) in which the ports b and c communicate with each other, and the ports a and b and the ports c, c, The second sending state (the state shown in FIG. 4 described later) in which d communicates is switched.

  The three-way valve 32 has three ports e, f, and g. The air-conditioning unit is not connected when the ports e and f are connected and the ports e and g and the ports f and g are disconnected (the state shown in FIG. 1). ) And the air conditioner unit connection state (states of FIGS. 2, 3 and 4 described later) in which the ports e and g communicate with each other and the ports e and f and the ports f and g are disconnected.

  Next, one end of the air conditioning unit 50 is connected to the port g of the three-way valve 32, and the other end is located between the port f of the three-way valve 32 of the refrigerant circulation circuit 40 and the first expansion valve 42 (at one end). The air conditioning refrigerant circulation path 51 connected to a location different from the connection location), the indoor heat exchanger 54 installed in the room and connected in the middle of the air conditioning refrigerant circulation path 51, and the indoor heat exchange of the air conditioning refrigerant circulation path 51 And a second expansion valve 53 connected between the port 54 and the port g of the three-way valve 32.

  The indoor heat exchanger 54 exchanges heat between the air (indoor air) supplied by the rotation of the indoor fan 55 and the refrigerant flowing through the air conditioning refrigerant circulation path 51. Similar to the first expansion valve 42, the second expansion valve 53 releases the pressure of the refrigerant pressurized by the compressor 41.

  The controller 70 is an electronic circuit unit configured by a CPU, a memory, various interface circuits, etc. (not shown), and the hot water storage type hot water supply apparatus is executed by the CPU executing a control program of the hot water storage type hot water supply apparatus 1 held in the memory. It functions to control the operation of 1.

  The controller 70 performs four types of operations, “single heat storage operation”, “heating operation”, “heat storage cooling operation”, and “single cooling operation” in accordance with an operation instruction from the remote controller 75. Note that the configuration in which the controller 70 performs four types of operations in this way corresponds to the control unit of the present invention. Hereinafter, the execution procedure of four types of operation by the controller 70 will be described.

  In the following, when the tank circulation pump 31 is turned off (stopped), the tank circulation pump 31 is stopped or intermittently operated, and heat exchange between hot water and refrigerant in the tank heat exchanger 43 is substantially performed. It means not to be in a state. Further, when the expansion valves (the first expansion valve 42 and the second expansion valve 53) are turned off (stopped), the expansion valve does not function to expand the refrigerant to a low pressure / low temperature. Means.

[1. Single heat storage operation]
With reference to FIG. 1, the execution procedure of the independent heat storage operation will be described. As shown in FIG. 1, the controller 70 sets the four-way valve 46 in the first delivery state, and the refrigerant that has been made high pressure and high temperature by the compressor 41 passes through the ports b and c of the four-way valve 46 and the tank heat exchanger. The state is sent to the 43 side. Moreover, the controller 70 sets the three-way valve 32 to the air conditioning unit disconnected state, and turns the indoor fan 55 and the second expansion valve 53 to the OFF state (stopped state).

  In this state, the controller 70 turns on the compressor 41, the outdoor fan 45, the first expansion valve 42, and the tank circulation pump 31 (operation state). Thereby, the hot water in the hot water storage tank 11 circulates through the tank circulation path 12. Further, the refrigerant that has been increased in pressure and temperature by the compressor 41 is changed from the compressor 41 to the four-way valve 46 (port b → c) → the tank heat exchanger 43 → the three-way valve 32 (port e → f) → the first expansion valve 42. It circulates in the refrigerant circuit 40 in the order of the outdoor heat exchanger 44, the four-way valve 46 (port a → d), and the compressor 41.

  As a result, in the tank heat exchanger 43, the hot water flowing through the tank circulation path 12 is heated to a predetermined boiling temperature by heat exchange with the refrigerant flowing through the refrigerant circulation circuit 40, and the upper part of the hot water storage tank 11. Returned to Thereby, the boiling water at the boiling temperature is sequentially stacked from the upper part of the hot water storage tank 11 and stored.

  The controller 70 detects the target hot water supply temperature (remote controller 75) from the hot water tap 90 when it detects that the hot water tap 90 is opened by a water amount sensor (not shown) provided in the water supply pipe 13 or the hot water pipe 14. A hot water supply operation is performed to control so that hot water (set by the above) is supplied.

  When the hot water in the hot water storage tank 11 has not run out (a state where the hot water in the hot water storage tank 11 has been used up), the controller 70 opens the hot water bypass valve 17 and closes the hot water open / close valve 23, When the hot water tap 90 is opened, the hot water supply operation is executed by adjusting the mixing ratio by the hot water mixing valve 16 so that hot water at the target hot water supply temperature (set by the remote controller 75) is supplied from the hot water tap 90. .

  When the hot water storage tank 11 has run out, the controller 70 closes the hot water bypass valve 17 and opens the hot water open / close valve 23 to open the hot water tap 90 when the hot water tap 90 is opened. The hot water supply operation is performed by adjusting the combustion amount of the burner 22 so that hot water at the target hot water temperature is supplied from the plug 90.

[2. Heating operation]
Next, with reference to FIG. 2, the execution procedure of heating operation is demonstrated. As shown in FIG. 2, the controller 70 sets the four-way valve 46 to the first delivery state, and the refrigerant that has been made high pressure and high temperature by the compressor 41 passes through the ports b and c of the four-way valve 46, and the tank heat exchanger The state is sent to the 43 side. Moreover, the controller 70 sets the three-way valve 32 to the air conditioning unit connection state, and turns the second expansion valve 53 and the tank circulation pump 31 to the OFF state (stop state).

  In this state, the controller 70 turns on the compressor 41, the first expansion valve 42, the outdoor fan 45, and the indoor fan 55 (operating state). As a result, the refrigerant whose pressure is increased by the compressor 41 is changed from the compressor 41 to the four-way valve 46 (port b → c) → the tank heat exchanger 43 → the three-way valve 32 (port e → g) → the second expansion valve. (OFF state) → indoor heat exchanger 54 → first expansion valve 42 (ON state) → outdoor heat exchanger 44 → four-way valve 46 (port a → d) → compressor 41 in this order. Circulate.

  As a result, in the indoor heat exchanger 54, the indoor air supplied by the indoor fan 55 is heated by the refrigerant flowing through the indoor heat exchanger 54, thereby heating the room.

[3. Thermal storage cooling operation]
Next, with reference to FIG. 3, the execution procedure of the heat storage cooling operation will be described. As shown in FIG. 3, the controller 70 sets the four-way valve 46 to the first delivery state, and the refrigerant pressurized by the compressor 41 is sent to the tank heat exchanger 43 side via the four-way valve 46. To. Moreover, the controller 70 sets the three-way valve 32 to the air conditioning unit connected state, and turns the first expansion valve 42 and the outdoor fan 45 to the OFF state (stopped state).

  In this state, the controller 70 turns on the compressor 41, the second expansion valve 53, the indoor fan 55, and the tank circulation pump 31 (operation state). Thereby, the hot water in the hot water storage tank 11 circulates through the tank circulation path 12. In addition, the refrigerant that has been made high-pressure and high-temperature by the compressor 41 is compressed by the compressor 41 → four-way valve 46 (port b → c) → tank heat exchanger 43 → three-way valve 32 (port e → g) → second expansion valve 53. (ON state) → Indoor heat exchanger 54 → first expansion valve 42 (OFF state) → outdoor heat exchanger 44 (outdoor fan 45 is OFF state) → four-way valve 46 (port a → d) → compressor 41 Thus, the refrigerant is circulated in the refrigerant circulation circuit 40 and the air conditioning refrigerant circulation path 51.

  As a result, in the tank heat exchanger 43, the hot water flowing through the tank circulation path 12 is heated to a predetermined boiling temperature by heat exchange with the refrigerant flowing through the refrigerant circulation circuit 40, and the upper part of the hot water storage tank 11. Returned to Thereby, the boiling water at the boiling temperature is sequentially stacked from the upper part of the hot water storage tank 11 and stored.

  In the indoor heat exchanger 54, the indoor air sucked by the indoor fan 55 is cooled by the refrigerant whose pressure is lowered and lowered by the second expansion valve 53, and the room is cooled. In this case, indoor heat (cooling exhaust heat) can be recovered and effectively used for boiling hot water in the hot water storage tank 11.

[4. Independent cooling operation]
Next, with reference to FIG. 4, the execution procedure of the single cooling operation will be described. As shown in FIG. 4, the controller 70 sets the four-way valve 46 to the second delivery state, and the refrigerant whose pressure is increased by the compressor 41 through the ports b and a of the four-way valve 46 passes through the outdoor heat exchanger. The state is set to be sent to the 44 side. Moreover, the controller 70 sets the three-way valve 32 to the air conditioning unit connection state, and turns the second expansion valve 53 and the tank circulation pump 31 to the OFF state (stop state).

  In this state, the controller 70 turns on the compressor 41, the first expansion valve 42, the outdoor fan 45, and the indoor fan 55 (operating state). As a result, the refrigerant that has been made high-pressure and high-temperature by the compressor 41 is converted into the compressor 41 → the four-way valve 46 (port b → a) → the outdoor heat exchanger 44 → the first expansion valve 42 (ON state) → the indoor heat exchanger. 54 → second expansion valve 53 (OFF state) → three-way valve 32 (port g → e) → tank heat exchanger 43 (tank circulation pump 31 is OFF) → four-way valve 46 (port c → d) → compressor 41 In this order, the refrigerant circulates in the refrigerant circuit 40 and the air conditioning refrigerant circuit 51.

  As a result, in the indoor heat exchanger 54, the indoor air sucked by the indoor fan 55 is cooled by the refrigerant whose pressure is lowered and lowered by the first expansion valve 42, thereby cooling the room.

  In addition, when the hot water storage tank 11 runs out during the heating operation and the single cooling operation, the hot water in the hot water storage tank 11 cannot be heated (boiling) by the heat pump unit 30. In this case, the controller 70 can perform the hot water supply operation by operating the auxiliary heat source unit 20 as described above.

  In this embodiment, the four-way valve 46 is provided to enable the single cooling operation. However, when the single cooling operation is not performed, the four-way valve 46 is not necessary.

  In the present embodiment, the second expansion valve 53 is provided to enable the heat storage cooling operation. However, when the heat storage cooling operation is not performed, the second expansion valve 53 is not necessary.

  In the present embodiment, the auxiliary heat source device 20 is provided so that the hot water supply operation can be continued even when the hot water storage tank 11 runs out. However, the auxiliary heat source device 20 is not provided. However, the effect of the present invention can be obtained.

  Moreover, in this embodiment, although the three-way valve 32 was used as the air-conditioning unit connection switching part of this invention, it uses other structures which can switch connection and interruption | blocking with the refrigerant circuit 40 and the air-conditioning refrigerant circuit 51. Also good.

  In the present embodiment, the four-way valve 46 is used as the delivery destination switching unit of the present invention. However, the delivery direction of the high-pressure and high-temperature refrigerant by the compressor 41 is set to the tank heat exchanger 43 side and the outdoor heat exchanger 44. Other configurations that can be switched to the other side may be used.

  DESCRIPTION OF SYMBOLS 1 ... Hot water storage type hot water supply apparatus, 10 ... Hot water storage unit, 11 ... Hot water storage tank, 12 ... Tank circulation path, 13 ... Water supply pipe, 14 ... Hot water supply pipe, 20 ... Auxiliary heat source machine, 30 ... Heat pump unit, 31 ... Tank circulation pump, 32 ... three-way valve, 40 ... refrigerant circulation circuit, 41 ... compressor, 42 ... first expansion valve, 43 ... tank heat exchanger, 44 ... outdoor heat exchanger, 46 ... four-way valve, 50 ... air conditioning unit, 51 ... air conditioning Refrigerant circuit, 53 ... second expansion valve, 54 ... indoor heat exchanger, 70 ... controller.

Claims (2)

A hot water storage unit having a hot water storage tank and a tank circulation path having both ends communicating with the hot water storage tank;
A tank circulation pump that circulates hot water in the hot water storage tank through the tank circulation path, a refrigerant circulation circuit in which refrigerant is sealed, and a refrigerant that is provided in the middle of the refrigerant circulation circuit and circulates through the refrigerant circulation circuit A compressor that compresses, a first expansion valve that is provided in the middle of the refrigerant circulation circuit and expands the refrigerant flowing through the refrigerant circulation circuit, and between the compressor and the first expansion valve of the refrigerant circulation circuit A tank heat exchanger that is connected to the tank circulation path and exchanges heat between the refrigerant flowing through the refrigerant circulation circuit and hot water flowing through the tank circulation path, and the refrigerant circulation circuit outside the tank. Outdoor heat exchange that is provided on the side where the tank heat exchanger between the compressor and the first expansion valve is not provided, and performs heat exchange between the refrigerant flowing through the refrigerant circulation circuit and the outside air. With heat And the pump unit,
Both ends of the refrigerant circulation circuit communicate with different locations between the tank heat exchanger and the first expansion valve in the refrigerant circulation circuit, and an air-conditioning refrigerant circulation path in which refrigerant is enclosed, and in the middle of the air-conditioning refrigerant circulation path in the room An air conditioning unit having an indoor heat exchanger that is provided and performs heat exchange between the refrigerant flowing through the air conditioning refrigerant circulation path and indoor air;
An air-conditioning unit connection state in which refrigerant can be circulated between the refrigerant circuit and the air-conditioning refrigerant circuit, and refrigerant cannot be circulated between connection points of the refrigerant circuit to both ends of the air-conditioning refrigerant circuit. The refrigerant circulation circuit and the air conditioning refrigerant circulation path are not allowed to flow, and the refrigerant circulation between the connection points of the refrigerant circulation circuit with the air conditioning refrigerant circulation path is not connected. An air conditioning unit connection switching unit that switches between the states;
Hot water in the hot water storage tank is heated by the tank heat exchanger by operating the tank circulation pump, the compressor, and the first expansion valve with the air conditioning unit connection switching unit in the disconnected state. The single heat storage operation, the air conditioning unit connection switching unit is set to the air conditioning unit connected state, the tank circulation pump is stopped, the compressor and the first expansion valve are operated, and the outdoor heat exchanger is operated. And a controller that performs a heating operation for heating the room by performing heat exchange with the indoor heat exchanger ,
An auxiliary heat source device that is connected to the hot water storage tank and is provided in the middle of a hot water pipe supplied with hot water stored in the hot water storage tank, and that heats the hot water flowing through the hot water pipe;
The control unit performs a hot water supply operation for discharging hot water at a target hot water supply temperature from the hot water discharge pipe, and supplies the hot water storage tank from the hot water storage tank to the hot water discharge pipe when the hot water storage tank runs out when the heating operation is performed. When the hot water at the target hot water supply temperature cannot be obtained from the hot water to be used, the hot water supply operation is performed by operating the auxiliary heat source machine . In the hot water storage type hot water supply apparatus according to claim 1 ,
Delivery that switches between a first delivery state in which the refrigerant compressed by the compressor is delivered to the tank heat exchanger side and a second delivery state in which the refrigerant compressed by the compressor is delivered to the outdoor heat exchanger side With a destination switching unit,
The controller sets the air conditioning unit connection switching unit to the air conditioning unit connected state, sets the delivery destination switching unit to the second delivery state, stops the tank circulation pump, stops the compressor and the first By operating the expansion valve and performing heat exchange with the outdoor heat exchanger and the indoor heat exchanger, the single cooling operation for cooling the room is executed , and when the single cooling operation is executed, When the hot water at the target hot water supply temperature cannot be obtained from the hot water supplied from the hot water storage tank to the outlet pipe due to running out of hot water in the hot water storage tank, the hot water supply operation is performed by operating the auxiliary heat source device. Water heater.