JP2016070630A - Hot water supply heating device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology capable of suppressing occurrence of a situation where heat storage capacity and heating capacity are not sufficient.SOLUTION: In the case where a heat storage operation for operating a compressor 12 and for storing heat in a tank 62 by operating a second pump 64, and a heating operation for heating indoors by a heating terminal 56 by operating a first pump 54 are performed simultaneously, a control device 8, in the case where an indoor temperature is equal to or higher than a heating preset temperature, brings a switching valve 70 into a state where a heating medium in a first heating medium circulation passage 50 does not flow in a bypass passage 58, and executes a first heat storage and heating simultaneous operation in which a burner 52 is not operated, and in the case where the indoor temperature is lower than the heating preset temperature, brings the switching valve 70 into a state where the heating medium flows in the bypass passage 58, and executes a second heat storage and heating simultaneous operation in which the burner 52 is operated.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a hot water supply and heating device.

  Patent Document 1 discloses a compressor that pressurizes a refrigerant, a heat exchanger that condenses the refrigerant by heat exchange with the heat medium, a decompression mechanism that decompresses the refrigerant, a heat pump that includes an evaporator that evaporates the refrigerant, A heating terminal that heats the room using the heat of the medium, a tank that stores the heat of the heating medium, a supply means that supplies hot water to the hot water using point using the heat stored in the tank, and a heating terminal There is disclosed a hot water supply and heating device including an adjusting unit that adjusts a ratio between a flow rate of the supplied heat medium and a flow rate of the heat medium supplied to the tank. This hot water heater / heater drives the heat pump and supplies the heat of the heat medium to both the heating terminal and the tank, thereby executing a heat storage and heating simultaneous operation for simultaneously storing heat in the tank and heating by the heating terminal.

JP 2010-196950 A

  In the hot water supply and heating apparatus of Patent Document 1, the heat storage capacity and the heating capacity are determined according to the capacity of the heat pump. However, in the hot water supply and heating device disclosed in Patent Document 1, for example, when performing the regenerative heating simultaneous operation in the severe cold season, there is a possibility that the heat storage capacity and the heating capacity may be insufficient.

  In this specification, the technique which can suppress that the situation where heat storage capability and heating capability run short occurs is provided.

  The hot water supply and heating device disclosed in this specification includes a compressor that pressurizes the refrigerant, a first heat exchanger that condenses the refrigerant by heat exchange with the first heat medium, and heat exchange between the second heat medium and the refrigerant. A second heat exchanger for condensing, a decompression mechanism for depressurizing the refrigerant, a heat pump including an evaporator for evaporating the refrigerant, a heating terminal for heating the room using the heat of the first heat medium, and a first heat exchange A heating circuit that circulates the first heat medium between the heater and the heating terminal, a first pump that circulates the first heat medium in the heating circuit, and a first heat medium that circulates in the heating circuit Among the heat source unit and the heating circuit, the upstream side and the downstream side of the first heat exchanger are connected to bypass the first heat exchanger, and the first heat medium in the heating circuit is the bypass channel. And the state where the first heating medium in the heating circuit does not flow through the bypass The second heat medium is circulated between the switching means, the tank for storing heat, the supply means for supplying hot water to the hot water using location using the heat stored in the tank, and the second heat exchanger and the tank. A tank circulation path, a second pump for circulating the second heat medium in the tank circulation path, and a control device. In the case of simultaneously performing a heat storage operation for storing heat in the tank by operating the heat pump and operating the second pump and a heating operation for heating the room by the heating terminal by operating the first pump, In the first case where the room temperature is equal to or higher than a specific threshold value, the switching unit is set to a state in which the first heat medium in the heating circulation path does not flow through the bypass path, and the first operation that does not operate the heat source unit is executed. In the second case where the indoor temperature is lower than the specific threshold, the second operation for operating the heat source unit is performed with the switching means in a state where the first heat medium in the heating circulation path flows through the bypass path.

  In the above hot water supply and heating device, when performing the heat storage operation and the heating operation in the tank at the same time, in the second case where the room temperature is lower than a specific threshold, the room temperature is equal to or higher than the specific threshold. The required heating capacity is higher than in the case of. In such a second case, if the heat storage capacity and the heating capacity are covered only by the heat pump, the heat storage capacity and the heating capacity may be insufficient. In this regard, the hot water supply / room heating device performs the second operation in the second case. By performing the second operation, the heat of the first heat medium supplied to the heating terminal can be covered by the heat source device, and all the heat of the heat pump can be supplied into the tank. In particular, when using what burns fuel, the heating capacity of the heat source machine (that is, the heating amount per unit time) is higher than the heating capacity of the heat pump. Therefore, it becomes easy to ensure sufficient heat storage capacity and heating capacity as compared with a situation where the heat storage capacity and heating capacity must be covered only by a heat pump. Therefore, in said hot water supply and heating apparatus, generation | occurrence | production of the situation where required heat storage capability and heating capability are insufficient can be suppressed in the 2nd case where the required heating capability is high compared with the 1st case.

The figure which shows the structure of the hot-water supply heating system 2 typically. The figure which shows typically the mode of the heat storage independent driving | operation in the hot water supply and heating system. The figure which shows typically the mode of the 1st heating independent operation (namely, heating independent operation in case room temperature is more than heating setting temperature) in the hot-water supply heating system 2. FIG. The figure which shows typically the mode of the 2nd heating independent operation in the hot-water supply heating system 2 (namely, heating independent operation when room temperature is lower than heating preset temperature). The figure which shows typically the mode of the 1st heat storage heating simultaneous operation | movement (namely, heat storage heating simultaneous operation in case room temperature is more than heating setting temperature) in the hot-water supply heating system 2. FIG. The figure which shows typically the mode of the 2nd thermal storage heating simultaneous operation (namely, thermal storage heating simultaneous operation in case room temperature is lower than heating preset temperature) in the hot-water supply heating system 2. FIG. The flowchart which shows the thermal storage heating control process which the control apparatus 8 performs.

  The main features of the embodiments described below are listed. The technical elements described below are independent technical elements and exhibit technical usefulness alone or in various combinations, and are not limited to the combinations described in the claims at the time of filing. Absent.

(Feature 1) The control device reduces the number of revolutions per unit time of the first pump when performing the first operation to be less than the number of revolutions per unit time of the first pump when performing the second operation. It is preferable.

  As described above, in the first case where the first operation is performed, the required heating capacity is low. Therefore, by reducing the number of rotations per unit time of the first pump when performing the first operation, the amount of heat per unit time applied to the first heat medium in the first heat exchanger (that is, depending on the heating terminal) Heating capacity) can be reduced, and the amount of heat per unit time applied to the second heat medium by the second heat exchanger can be increased. When performing the first operation, a sufficient amount of heat storage in the tank can be secured. In the second case where the second operation is performed, the required heating capacity is high. As described above, when the second operation is performed, the heat pump, the heat source unit, the first pump, and the second pump are operated with the switching unit in a state where the first heat medium in the heating circulation path flows through the bypass path. Let That is, the heat of the refrigerant can be given only to the second heat medium. Therefore, also when performing 2nd driving | operation, the heat storage amount to a tank can fully be ensured.

(Characteristic 2) In the case where the control device does not perform the heat storage operation, operates the heat pump, operates the first pump, and independently performs the heating operation for heating the room by the heating terminal, the room temperature is equal to or higher than a specific threshold value. In the third case, the switching means is in a state in which the first heat medium in the heating circulation path does not flow through the bypass path, the third operation in which the heat source machine is not operated is executed, and the room temperature is a specific threshold value. In the lower fourth case, it is preferable to execute the fourth operation of operating the heat source unit with the switching means in a state in which the first heat medium in the heating circulation path does not flow through the bypass path.

  According to this configuration, in the case where the heating operation is performed alone, the fourth case where the indoor temperature is lower than the specific threshold is required as compared with the third case where the indoor temperature is equal to or higher than the specific threshold. High heating capacity. In such a fourth case, if the heating capacity is covered only by the heat pump, the heating capacity may be insufficient. In this regard, according to the above-described configuration, the hot water supply / room heating device performs the fourth operation in the fourth case. By performing the fourth operation, the heat of the first heat medium supplied to the first heating terminal can be covered by both the heat pump and the heat source device. That is, it becomes easy to ensure sufficient heating capacity as compared with the case where the heating capacity must be covered only by the heat pump. Therefore, in the hot water supply and heating apparatus described above, it is possible to suppress the occurrence of a situation where the required heating capacity is insufficient in the fourth case where the required heating capacity is higher than in the third case.

(Feature 3) The indoor air heat exchanger in which the heat pump condenses the refrigerant by heat exchange with the indoor air, the flow rate of the refrigerant supplied to the indoor air heat exchanger, the first heat exchanger, and the second heat exchanger Adjusting means capable of adjusting the ratio of the flow rate of the refrigerant supplied to the first heat in the case where the control device performs the heat storage operation and the heating operation simultaneously as in the first case and the second case. The ratio of the flow rate of the refrigerant supplied to the exchanger and the second heat exchanger is the first heat exchanger and the second heat exchanger when the heating operation is performed independently as in the third case and the fourth case. It is preferable to operate the adjusting means so as to be larger than the ratio of the flow rate of the refrigerant supplied to the.

  As described above, the first case and the second case are cases where the room is heated and the amount of heat in the tank is increased. According to the above configuration, in such a case, the refrigerant having a larger flow rate can be supplied to the first heat exchanger and the second heat exchanger with respect to the flow rate of the refrigerant supplied to the indoor air heat exchanger. . That is, more heat of the refrigerant can be supplied to the tank than in the third and fourth cases where it is not necessary to increase the amount of heat in the tank. Therefore, according to this configuration, the room can be appropriately heated while appropriately storing heat in the tank.

(Example)
(System configuration: Fig. 1)
As shown in FIG. 1, the hot water supply and heating system 2 of the present embodiment includes a heat pump air conditioner 4, a floor heating device 6, a hot water supply device 7, and a control device 8.

The heat pump air conditioner 4 uses a refrigerant (for example, an HFC refrigerant such as R32 or R410, a CO ₂ refrigerant such as R744, etc.) to absorb heat from the outdoor air and dissipate heat to the indoor air. The heat pump air conditioner 4 includes a compressor 12, a flow rate adjustment valve 14, a heat medium heat exchanger 16, a first expansion valve 18, an outdoor air heat exchanger 20, a first fan 22, and indoor air heat exchange. , A second fan 28, a second expansion valve 30, and a refrigerant circulation path 32.

  The compressor 12 compresses and sends out the gas-phase refrigerant. The flow rate adjusting valve 14 includes three ports e, f, and g, and can supply the gas-phase refrigerant supplied from the compressor 12 to the port e to the ports f and g. The flow rate adjusting valve 14 adjusts the opening degree to adjust the flow rate of the refrigerant flowing from the port e to the port f (that is, the refrigerant supplied to the heat medium heat exchanger 16) and the refrigerant flowing from the port e to the port g (that is, the refrigerant). The ratio of the flow rate of the refrigerant) supplied to the indoor air heat exchanger 26 can be adjusted. The heat medium heat exchanger 16 exchanges heat between a heat medium passing through a first heat medium circulation path 50 to be described later and a refrigerant passing through the refrigerant circulation path 32 and a second heat medium circulation to be described later. Heat is exchanged between the heat medium passing through the passage 60 and the refrigerant passing through the refrigerant circulation passage 32. The first expansion valve 18 decompresses the liquid phase refrigerant by adiabatically expanding the refrigerant. The outdoor air heat exchanger 20 exchanges heat between the outdoor air blown by the first fan 22 and the refrigerant. The outdoor air heat exchanger 20 and the first fan 22 are disposed outside the room. In the vicinity of the first fan 22, an outside air temperature thermistor 40 that detects the outside air temperature is provided.

  The indoor air heat exchanger 26 exchanges heat between the indoor air blown by the second fan 28 and the refrigerant. The indoor air heat exchanger 26 and the second fan 28 are indoors and are disposed at a higher position in the room than a heating terminal 56 (that is, a floor heating terminal) described later. An indoor temperature thermistor 42 that detects the indoor temperature is provided in the vicinity of the second fan 28. The second expansion valve 30 decompresses the liquid phase refrigerant by adiabatic expansion.

  The refrigerant circuit 32 includes refrigerant, the compressor 12, the flow rate adjustment valve 14, the heat medium heat exchanger 16, the first expansion valve 18, the outdoor air heat exchanger 20, and the indoor air heat exchanger 26. And circulating between the second expansion valve.

  The floor heating device 6 performs heat radiation to the room air (so-called floor heating) using a heat medium (for example, water, antifreeze liquid, etc.). The floor heating device 6 includes a heat medium heat exchanger 16, a first heat medium circulation path 50, a burner 52, a first pump 54, a heating terminal 56, a bypass path 58, and a switching valve 70. ing. The first heat medium circulation path 50 circulates the heat medium among the heat medium heat exchanger 16, the burner 52, and the heating terminal 56. The burner 52 heats the heat medium passing through the first heat medium circulation path 50 by using combustion heat generated by burning fuel such as gas. The burner 52 is disposed at a position in the first heat medium circulation path 50 that is downstream of the heat medium heat exchanger 16 and that can heat the heat medium that passes through the portion upstream of the heating terminal 56. . The first pump 54 circulates the heat medium in the first heat medium circulation path 50. The heating terminal 56 radiates the heat of the heat medium to the indoor air. The heating terminal 56 is a floor heating terminal arranged on the indoor floor. The heating terminal 56 is provided in the first heat medium circulation path 50 on the downstream side of the heat medium heat exchanger 16 and the burner 52. Therefore, the heating terminal 56 is supplied with the heat medium after being heated by the heat medium heat exchanger 16 and the burner 52. The heat medium heat exchanger 16 is provided in a portion of the first heat medium circulation path 50 on the downstream side of the heating terminal 56. The heat medium heat exchanger 16 is supplied with a low-temperature heat medium after radiating heat from the heating terminal 56. The upstream end of the bypass channel 58 is connected between the downstream side of the heat medium heat exchanger 16 and the upstream side of the burner 52 in the first heat medium circulation path 50, and the downstream end is the first end. It is connected between the downstream side of the heating terminal 56 and the first pump 54 in the one heat medium circulation path 50 and the upstream side of the heat medium heat exchanger 16. The switching valve 70 is interposed at a connection portion between the upstream end portion of the bypass passage 58 and the first heat medium circulation passage 50. The switching valve 70 includes three ports h, i, and j. The switching valve 70 is in a state where the heat medium in the first heat medium circulation path 50 is supplied to the heat medium heat exchanger 16 and does not pass through the bypass path 58 (that is, the state where the port h and the port i communicate with each other). ) And a state in which the heat medium passes through the bypass path 58 and is not supplied to the heat medium heat exchanger 16 (that is, a state in which the port i and the port j communicate with each other).

  The hot water supply device 7 heats the water in the tank 62 using the heat of a heat medium (for example, water, antifreeze liquid, etc.), and supplies the hot water stored in the tank 62 to the hot water supply location. The hot water supply device 7 includes a second heat medium circulation path 60, a tank 62, a tank thermistor 63, a second pump 64, a hot water supply pipe 66, and a water introduction pipe 68. The second heat medium circulation path 60 circulates the heat medium between the heat medium heat exchanger 16 and the tank 62. The tank 62 stores water used in the hot water supply device 7. The tank 62 is a sealed type, and the outside is covered with a heat insulating material. A second heat medium circulation path 60 is passed through the tank 62. The water in the tank 62 is heated by heat exchange between the heat medium in the second heat medium circulation path 60 passing through the tank 62 and the water in the tank 62. The second pump 64 circulates the heat medium in the second heat medium circuit 60. The upstream end of the hot water supply pipe 66 is connected to the upper part of the tank 62. The downstream end side of the hot water supply pipe 66 is arranged at a hot water use location. The hot water supply pipe 66 supplies the hot water in the tank 62 to the hot water use location according to a user operation (for example, an operation for opening the currant). The upstream end of the water introduction pipe 68 is connected to a water supply (not shown), and the downstream end is connected to the lower part of the tank 62. When the hot water in the tank 62 is supplied from the hot water supply pipe 66 to the hot water use location, the water introduction pipe 68 introduces the same amount of hot water supplied to the hot water use location from the water supply into the tank 62. . Therefore, water is always stored in the tank 62 until it is full. The tank thermistor 63 detects the temperature of the water in the tank 62.

  The control device 8 includes a CPU, a ROM, a RAM, and the like. Various operation programs are stored in the ROM. The RAM temporarily stores various signals input to the control device 8 and various data generated in the course of execution of processing by the CPU. In the control device 8, the CPU controls the operation of each component of the heat pump air conditioner 4, the floor heating device 6, and the hot water supply device 7 based on information stored in the ROM or RAM. The control device 8 is connected to a remote controller (not shown). The remote controller is provided with a switch for the user to operate the hot water supply / heating system 2, a liquid crystal display for displaying the operation state of the hot water supply / heating system 2 to the user, and the like. The user can instruct the start and end of heating and the like via the remote control. Moreover, the user can also set heating preset temperature via a remote control.

(Operation of hot water supply / heating system 2)
Next, the operation of the hot water supply / heating system 2 will be described. The hot water supply and heating system 2 includes a hot water supply operation, a single heat storage operation, a single heating operation (that is, a first single heating operation and a second single heating operation), and a simultaneous heat storage and heating operation (that is, a first simultaneous heat storage and heating operation). , The second heat storage and heating simultaneous operation) can be executed.

(Hot water operation)
The hot water supply / heating system 2 starts a hot water supply operation when a user opens a kitchen or bathroom curan or fills a bathtub. Hot water filling to the bathtub may be started, for example, when the user presses the hot water start switch on the remote control, or when the hot water start time based on the hot water completion time set by the user on the remote control arrives. Sometimes. The hot water supply operation can be performed in parallel with a single heat storage operation, a single heating operation, and a simultaneous heat storage heating operation, which will be described later. In the hot water supply operation, the hot water supply / heating system 2 supplies the hot water in the tank 62 to the hot water use location via the hot water supply pipe 66.

(Heat storage single operation; Fig. 2)
When heating is not instructed by the user and a heat storage request to the tank 62 is generated, the hot water supply / heating system 2 performs the heat storage independent operation. The heat storage request is generated, for example, when the amount of heat stored in the tank 62 decreases as a result of performing a hot water supply operation. Specifically, the heat storage request is generated when the temperature detected by the tank thermistor 63 becomes lower than a predetermined heat storage start temperature. In the single heat storage operation, the water in the tank 62 is boiled up to a predetermined heat storage end temperature and stored in the tank 62. As shown in FIG. 2, in the single heat storage operation, the control device 8 causes the flow rate adjustment valve 14 to be supplied to the port f so that the total flow rate of the refrigerant supplied to the port e is not supplied to the port g. Adjust (that is, port e and port f communicate with each other, and port e and port g do not communicate). The control device 8 drives the first fan 22 and the compressor 12. Further, the control device 8 drives the second pump 64.

  The refrigerant in the vapor phase that has been pressurized by the compressor 12 to become high temperature and pressure is sent to the heat medium heat exchanger 16 via the flow rate adjustment valve 14 (port f). The high-temperature and high-pressure gas-phase refrigerant is cooled and condensed by heat exchange with the heat medium in the second heat medium circulation path 60 in the heat medium heat exchanger 16 to be in a liquid phase state. The refrigerant that has become a liquid phase in the heat medium heat exchanger 16 is sent to the first expansion valve 18. The liquid-phase refrigerant that has been decompressed by the first expansion valve 18 to become low-temperature and low-pressure is sent to the outdoor air heat exchanger 20. The low-temperature and low-pressure refrigerant in the liquid phase is heated and evaporated by heat exchange with the outdoor air in the outdoor air heat exchanger 20 to be in a gas phase. The refrigerant in the gas phase is returned to the compressor 12.

  In addition, when the second pump 64 is driven, the heat medium circulates in the second heat medium circulation path 60. The high-temperature heat medium heated by heat exchange with the high-temperature and high-pressure refrigerant in the heat medium heat exchanger 16 passes through the tank 62. The high temperature heat medium is cooled by exchanging heat with the water in the tank 62 while passing through the tank 62. As a result, the water in the tank 62 is heated by the heat of the heat medium. The low-temperature heat medium after passing through the tank 62 is supplied to the heat medium heat exchanger 16 and heated again by heat exchange with the refrigerant.

  The hot water supply and heating system 2 can heat the hot water in the tank 62 by circulating the refrigerant and the heat medium in the above cycle. The control device 8 ends the single heat storage operation when the temperature detected by the tank thermistor 63 reaches a predetermined heat storage end temperature after starting the single heat storage operation.

(Heating only operation)
When the heating is instructed by the user and the heat storage request to the tank 62 is not generated, the hot water supply / heating system 2 performs the heating independent operation. At this time, the hot water supply / heating system 2 determines whether the room temperature detected by the room temperature thermistor 42 is equal to or higher than the heating set temperature Ts set by the remote controller or whether the room temperature is lower than the heating set temperature Ts. Separate heating operation with different contents. Hereinafter, the contents of two heating single operations (first heating single operation and second heating single operation) will be described.

(First heating single operation; FIG. 3)
When the hot water supply / heating system 2 performs the heating independent operation, if the room temperature detected by the room temperature thermistor 42 is equal to or higher than the heating set temperature Ts, the hot water heating / heating system 2 executes the first heating independent operation. When the room temperature is equal to or higher than the heating set temperature Ts, the required heating capacity is lower than when the room temperature is lower than the heating set temperature Ts. As shown in FIG. 3, in the first heating single operation, the control device 8 uses the flow rate adjustment valve 14, a part of the refrigerant supplied to the port e is supplied to the port g, and the other part is the port f. So that the opening degree is adjusted so that the port e and the port f and the port e and the port g communicate with each other. At this time, the control device 8 adjusts the opening degree of the flow rate adjusting valve 14 so that the flow rate of the refrigerant supplied to the port f and the flow rate of the refrigerant supplied to the port g are substantially equal (that is, f = G). Further, the control device 8 drives the first fan 22 and the second fan 28 and drives the compressor 12. At this time, the control device 8 sets the rotational speed per unit time of the compressor 12 to a relatively small rotational speed R1. Further, the control device 8 causes the switching valve 70 to be in a state where the heat medium in the first heat medium circulation path 50 is supplied to the heat medium heat exchanger 16 and does not pass through the bypass path 58 (that is, the port h and the port i). Switch to the state of communication. Further, the control device 8 drives the first pump 54. At this time, the control device 8 sets the rotational speed per unit time of the first pump 54 to a relatively large R3. In the first heating single operation, the control device 8 does not drive the burner 52.

  A part of the refrigerant in a gas phase that has been pressurized by the compressor 12 to become high temperature and pressure is sent to the indoor air heat exchanger 26 via the flow rate adjusting valve 14 (port g). The high-temperature and high-pressure refrigerant in the gas phase is cooled and condensed by heat exchange with the indoor air in the indoor air heat exchanger 26 to be in a liquid phase. The refrigerant that has become a liquid phase in the indoor air heat exchanger 26 is sent to the second expansion valve 30. The liquid-phase refrigerant that has been decompressed by the second expansion valve 30 to become low-temperature and low-pressure merges with the low-temperature and low-pressure liquid-phase refrigerant sent from the first expansion valve 18 and is sent to the outdoor air heat exchanger 20. . The low-temperature and low-pressure refrigerant in the liquid phase is heated and evaporated by heat exchange with the outdoor air in the outdoor air heat exchanger 20 to be in a gas phase. The refrigerant in the gas phase is returned to the compressor 12.

  On the other hand, the other part of the refrigerant in the gas phase that has been pressurized by the compressor 12 to a high temperature and high pressure is sent to the heat transfer medium heat exchanger 16 via the flow rate adjustment valve 14 (port f). The high-temperature and high-pressure refrigerant in the gas phase is cooled and condensed by heat exchange with the heat medium in the heat medium heat exchanger 16 to be in a liquid phase. The refrigerant that has become a liquid phase in the heat medium heat exchanger 16 is sent to the first expansion valve 18. The liquid-phase refrigerant that has been decompressed by the first expansion valve 18 to become low-temperature and low-pressure merges with the low-temperature and low-pressure liquid-phase refrigerant sent from the second expansion valve 30 and is sent to the outdoor air heat exchanger 20. It is done. Since the subsequent flow of the refrigerant is as described above, detailed description thereof is omitted.

  In addition, when the first pump 54 is driven, the heat medium circulates in the first heat medium circulation path 50. The high-temperature heat medium heated by heat exchange with the high-temperature and high-pressure refrigerant in the heat medium heat exchanger 16 is sent to the heating terminal 56 via the switching valve 70. The high-temperature heat medium is cooled by radiating heat into the room at the heating terminal 56. The low-temperature heat medium after passing through the heating terminal 56 is supplied to the heat medium heat exchanger 16 via the first pump 54 and is heated again by heat exchange with the refrigerant.

  In the first heating independent operation, the hot water supply / heating system 2 radiates heat to the indoor air in both the indoor air heat exchanger 26 and the heating terminal 56 by circulating the refrigerant and the heat medium in the above-described cycle, Can be heated.

(Second heating single operation; FIG. 4)
When the hot water supply and heating system 2 executes the heating single operation, if the room temperature detected by the room temperature thermistor 42 is lower than the heating set temperature Ts, the hot water supply and heating system 2 executes the second heating single operation. When the room temperature is lower than the heating set temperature Ts, the required heating capacity is higher than when the room temperature is equal to or higher than the heating set temperature Ts. As shown in FIG. 4, also in the second heating single operation, the control device 8 adjusts the flow rate adjustment valve 14 and the switching valve 70 to the same opening degree as in the first heating single operation. Furthermore, the control device 8 drives the first fan 22, the second fan 28, and the first pump 54 (rotation speed R3) under the same conditions as in the first heating single operation. Further, in the second heating independent operation, the control device 8 sets the rotation speed per unit time of the compressor 12 to R2 higher than the above R1, and drives the compressor 12. Further, in the second heating single operation, the control device 8 drives the burner 52.

  The circulation cycle of the refrigerant and the heat medium in the second heating single operation is basically the same as the circulation cycle of the refrigerant and the heat medium in the first heating single operation. However, in the second heating single operation, when the burner 52 is driven, the high-temperature heat medium heated by the heat exchange with the high-temperature and high-pressure refrigerant in the heat medium heat exchanger 16 burns the fuel in the burner 52. It is further heated by heat and becomes a higher temperature heat medium. That is, in the second heating single operation, a high-temperature heat medium heated by both the heat medium heat exchanger 16 and the burner 52 is supplied to the heating terminal 56. Moreover, since the rotation speed R2 per unit time of the compressor 12 is larger than the rotation speed R1 of the compressor 12 at the time of the first heating single operation, the high temperature and high pressure after being compressed by the compressor 12 is increased. The temperature of the refrigerant also becomes higher than in the case of the first heating single operation. Therefore, the heating capability by the indoor air heat exchanger 26 and the heating terminal 56 is higher than that in the first heating single operation.

(Simultaneous operation of heat storage and heating)
When heating is instructed by the user and a heat storage request to the tank 62 is generated, the hot water supply / heating system 2 performs the heat storage / heating simultaneous operation. At this time, the hot water supply / heating system 2 determines whether the room temperature detected by the room temperature thermistor 42 is equal to or higher than the heating set temperature Ts set by the remote controller or whether the room temperature is lower than the heating set temperature Ts. Simultaneous operation of regenerative heating with different contents. Hereinafter, the contents of two simultaneous heat storage heating operations (first heat storage heating simultaneous operation and second heat storage heating simultaneous operation) will be described.

(First heat storage and heating simultaneous operation; FIG. 5)
When the hot water supply / heating system 2 performs the regenerative heating simultaneous operation, and the indoor temperature detected by the indoor temperature thermistor 42 is equal to or higher than the heating set temperature Ts, the hot water supply / heating system 2 executes the first regenerative heating simultaneous operation. . When the room temperature is equal to or higher than the heating set temperature Ts, the required heat storage capacity and heating capacity are lower than when the room temperature is lower than the heating set temperature Ts. As shown in FIG. 5, in the first simultaneous heat storage and heating operation, the control device 8 uses the flow rate adjustment valve 14, a part of the refrigerant supplied to the port e is supplied to the port g, and the other part is the port. The opening is adjusted so as to be supplied to f (that is, port e and port f and port e and port g communicate with each other). At this time, the control device 8 adjusts the opening degree of the flow rate adjustment valve 14 so that the flow rate of the refrigerant supplied to the port f is larger than the flow rate of the refrigerant supplied to the port g (that is, f> g). Further, the control device 8 drives the first fan 22 and the second fan 28 and drives the compressor 12. At this time, the control device 8 sets the number of rotations per unit time of the compressor 12 to R2, which is greater than the above R1. Further, the control device 8 causes the switching valve 70 to be in a state where the heat medium in the first heat medium circulation path 50 is supplied to the heat medium heat exchanger 16 and does not pass through the bypass path 58 (that is, the port h and the port i). Switch to the state of communication. Further, the control device 8 drives the first pump 54 and the second pump 64. At this time, the control device 8 sets the number of rotations per unit time of the first pump 54 to R4 which is smaller than the above R3. Further, the number of rotations per unit time of the second pump 64 is set to a predetermined value. In the first simultaneous heat storage and heating operation, the control device 8 does not drive the burner 52.

  Since the movement of the refrigerant due to the driving of the compressor 12 is the same as in the first and second heating independent operations (see FIGS. 3 and 4), detailed description thereof is omitted. Even in the first simultaneous heat storage and heating operation, the number of revolutions R2 of the compressor 12 per unit time is larger than that in the first heating single operation (R1), so the high-temperature and high-pressure compressed by the compressor 12 is high. The temperature of the refrigerant is also higher than that during the first heating single operation. In the first simultaneous heat storage and heating operation, the opening degree of the flow rate adjustment valve 14 is adjusted so that the flow rate of the refrigerant supplied to the port f is larger than the flow rate of the refrigerant supplied to the port g ( f> g). Therefore, more high-temperature and high-pressure refrigerant is supplied to the heat medium heat exchanger 16. As a result, in the heat medium heat exchanger 16, the high-temperature and high-pressure refrigerant can exchange more heat with the heat medium in the second heat medium circuit 60.

  The movement of the heat medium due to the driving of the first pump 54 is also the same as in the case of the first and second heating independent operations (see FIGS. 3 and 4), and thus detailed description thereof is omitted. However, in the first heat storage and heating simultaneous operation, the number of revolutions R4 per unit time of the first pump 54 is smaller than that in the first and second heating independent operations (R3). Therefore, in the heat medium heat exchanger 16, the heating amount per unit time applied from the refrigerant to the heat medium in the first heat medium circulation path 50 is smaller than that in the first and second heating independent operations. Thereby, in the heat medium heat exchanger 16, more heat is applied from the refrigerant to the heat medium in the second heat medium circulation path 60.

  The movement of the heat medium due to the driving of the second pump 64 is the same as in the case of the single heat storage operation (FIG. 2), and thus detailed description thereof is omitted.

  In the first heat storage and heating simultaneous operation, the hot water supply and heating system 2 radiates heat to the indoor air in both the indoor air heat exchanger 26 and the heating terminal 56 by circulating the refrigerant and the heat medium in the above cycle, The room can be heated and hot water can be stored in the tank 62. When the temperature detected by the tank thermistor 63 reaches a predetermined heat storage end temperature after starting the first heat storage heating simultaneous operation, the control device 8 ends the first heat storage heating simultaneous operation. At this time, when the heating operation instruction is continuously performed (when the end of heating is not instructed by the user), the control device 8 continues to the first after the end of the first simultaneous heat storage and heating operation. Run the heating alone.

(Second heat storage and heating simultaneous operation; FIG. 6)
When the hot water supply / heating system 2 executes the regenerative heating simultaneous operation, if the indoor temperature detected by the indoor temperature thermistor 42 is lower than the heating set temperature Ts, the hot water supply / heating system 2 executes the second regenerative heating simultaneous operation. When the room temperature is lower than the heating set temperature Ts, the required heat storage capacity and heating capacity are higher than when the room temperature is equal to or higher than the heating set temperature Ts. As shown in FIG. 6, the opening degree of the flow rate adjustment valve 14 is set so that the flow rate of the refrigerant supplied to the port f is larger than the flow rate of the refrigerant supplied to the port g even in the second simultaneous heat storage and heating operation. Is adjusted (ie, f> g). Further, the control device 8 drives the first fan 22 and the second fan 28 and drives the compressor 12. Even in the second heat storage heating simultaneous operation, the control device 8 sets the number of rotations of the compressor 12 per unit time to R2, which is greater than the above R1. Further, the control device 8 causes the switching valve 70 to be in a state where the heat medium in the first heat medium circulation path 50 passes through the bypass path 58 and is not supplied to the heat medium heat exchanger 16 (that is, the port i and the port j). Switch to the state of communication. Further, the control device 8 drives the first pump 54 and the second pump 64. The control apparatus 8 sets the rotation speed per unit time of the 1st pump 54 to R3 more than the time of the 1st heat storage heating simultaneous operation (R4). Further, the number of rotations per unit time of the second pump 64 is set to a predetermined value. Furthermore, in the second simultaneous heat storage and heating operation, the control device 8 drives the burner 52.

  Since the movement of the refrigerant due to the driving of the compressor 12 is the same as in the case of the first heat storage and heating simultaneous operation (see FIG. 5), detailed description thereof is omitted. Even in the second heat storage and heating simultaneous operation, the number of revolutions R2 per unit time of the compressor 12 is larger than that in the first heating single operation (R1), and thus the high-temperature and high-pressure refrigerant compressed by the compressor 12 Is also higher than during the first heating single operation. In addition, the opening degree of the flow rate adjustment valve 14 is adjusted so that the flow rate of the refrigerant supplied to the port f is larger than the flow rate of the refrigerant supplied to the port g even during the second simultaneous heat storage and heating operation. (F> g). Therefore, more high-temperature and high-pressure refrigerant is supplied to the heat medium heat exchanger 16. As a result, in the heat medium heat exchanger 16, the high-temperature and high-pressure refrigerant exchanges more heat between the heat medium in the first heat medium circuit 50 and the heat medium in the second heat medium circuit 60. be able to.

  When the first pump 54 is driven, the heat medium in the first heat medium circulation path 50 passes through the bypass path 58 without being supplied to the heat medium heat exchanger 16, and the burner 52, the heating terminal 56, Circulate between. However, in the second simultaneous heat storage and heating operation, when the burner 52 is driven, the heat medium circulating in the above path is sufficiently heated by the combustion heat of the fuel in the burner 52 and becomes a high-temperature heat medium. In the second simultaneous heat storage and heating operation, a high-temperature heat medium heated by the burner 52 is supplied to the heating terminal 56. The combustion heat of the burner 52 has a higher heating capacity (that is, a larger heating amount per unit time) than the refrigerant that passes through the heat medium heat exchanger 16. Therefore, the heating capability by the heating terminal 56 is higher than that during the first simultaneous heat storage and heating operation.

  The movement of the heat medium due to the driving of the second pump 64 is the same as in the case of the single heat storage operation (FIG. 2), and thus detailed description thereof is omitted. However, in the second heat storage and heating simultaneous operation, the heat medium in the first heat medium circulation path 50 is not supplied to the heat medium heat exchanger 16, and therefore, in the heat medium heat exchanger 16, the heat of all the refrigerant is It is added to the heat medium in the two heat medium circuit 60. Therefore, compared with the time of the 1st heat storage heating simultaneous operation, heat storage capability also becomes high.

  In the second heat storage and heating simultaneous operation, the hot water supply and heating system 2 radiates heat to the indoor air in both the indoor air heat exchanger 26 and the heating terminal 56 by circulating the refrigerant and the heat medium in the above cycle, The room can be heated and hot water can be stored in the tank 62. The control device 8 ends the second simultaneous heat storage and heating operation when the temperature detected by the tank thermistor 63 reaches a predetermined heat storage end temperature after starting the second heat storage and heating simultaneous operation. At this time, when the heating operation instruction is continuously performed (when the end of heating is not instructed by the user), the control device 8 continues to the second after the end of the second simultaneous heat storage and heating operation. Run the heating alone.

(Heat storage heating control processing; FIG. 7)
When heating is instructed by the user, which of the individual heating operation and the regenerative heating simultaneous operation described with reference to FIGS. 3 to 6 is executed is the heat storage heating control process executed by the control device 8 (FIG. 7). Hereinafter, the content of the heat storage and heating control process executed by the control device 8 will be described.

  If heating is instruct | indicated by the user, the control apparatus 8 will start the thermal storage heating control process of FIG. When the heat storage and heating control process is started, in S10, the control device 8 determines whether or not the room temperature detected by the room temperature thermistor 42 is equal to or higher than the heating set temperature Ts.

  When the room temperature is equal to or higher than the heating set temperature Ts, the control device 8 determines YES in S10, and proceeds to S12. In this embodiment, the case of YES in S10 is a case where the room temperature has reached the heating set temperature requested by the user and high heating capacity is not required. On the other hand, when the room temperature is lower than the heating set temperature Ts, the control device 8 determines NO in S10, and proceeds to S22. In this embodiment, the case of NO in S10 is a case where the room temperature has not reached the heating set temperature requested by the user and a high heating capacity is required.

  In S12, the control device 8 determines whether or not the temperature of water in the tank 62 detected by the tank thermistor 63 (hereinafter sometimes referred to as tank temperature) is lower than a predetermined heat storage start temperature.

  When the tank temperature is lower than the heat storage start temperature at the time of S12, the control device 8 determines YES in S12, and proceeds to S16. The case of YES in S12 is a case where a heat storage request to the tank 62 is generated. In this case, in S16, the control device 8 executes the first heat storage and heating simultaneous operation (see FIG. 5). If the first heat storage and heating simultaneous operation has already been performed at the time of S16, the first heat storage and heating simultaneous operation is continued. Since the content of the first heat storage and heating simultaneous operation is as described above with reference to FIG. 5, detailed description is omitted. When the first heat storage and heating simultaneous operation is started in S16, the control device 8 returns to S10.

  When the tank temperature is equal to or higher than the heat storage start temperature at the time of S12, the control device 8 determines NO in S12, and proceeds to S14. In S14, the control device 8 determines whether or not the tank temperature is equal to or higher than a predetermined heat storage end temperature.

  When the tank temperature is lower than the heat storage end temperature at the time of S14, the control device 8 determines NO in S14 and proceeds to S16. The case of NO in S14 is a case where the tank temperature has not reached the heat storage end temperature at the time of S14 (that is, when boiling is not completed). In this case, the control apparatus 8 performs the 1st heat storage heating simultaneous operation (refer FIG. 5) in S16. If the first heat storage and heating simultaneous operation has already been performed at the time of S16, the first heat storage and heating simultaneous operation is continued. Thereafter, the control device 8 returns to S10.

  On the other hand, when the tank temperature is equal to or higher than the heat storage start temperature at S14 (that is, when boiling has already been completed and no heat storage request has been generated), the control device 8 determines YES in S14, Proceed to S18. In S18, the control device 8 executes the first heating single operation (see FIG. 3). If the first heating single operation has already been performed at the time of S18, the first heating single operation is continued. The details of the first heating single operation are as described above with reference to FIG. When the first heating single operation is started in S18, the control device 8 returns to S10.

  In S22, the control device 8 performs the same determination as the determination in S12. In the case of YES in S22, the control device 8 proceeds to S26 and executes the second heat storage and heating simultaneous operation (see FIG. 6). When the second heat storage and heating simultaneous operation has already been performed at the time of S26, the second heat storage and heating simultaneous operation is continued. Since the content of the second heat storage and heating simultaneous operation is as described above with reference to FIG. 6, detailed description thereof is omitted. When the second heat storage and heating simultaneous operation is started in S26, the control device 8 returns to S10.

  On the other hand, in the case of NO in S22, the process proceeds to S24, and the control device 8 performs the same determination as the determination in S14. In the case of NO in S24, the control device 8 proceeds to S26 and executes the second heat storage and heating simultaneous operation (see FIG. 6). The control apparatus 8 will return to S10, if the 2nd thermal storage heating simultaneous operation is started by S26. On the other hand, in the case of YES in S24, the control device 8 proceeds to S28 and executes the second heating single operation. The control apparatus 8 will return to S10, if the 2nd heating independent operation is started by S28.

  The control device 8 repeatedly executes the heat storage and heating control process (S10 to S28) until the user instructs the stop of heating. When the stop of heating is instructed by the user, the control device 8 ends the heat storage heating control process.

  Heretofore, the configuration and operation details of the hot water supply / heating system 2 of the present embodiment have been described. In the hot water supply and heating system 2 of this embodiment, when the regenerative heating simultaneous operation is to be performed, the room temperature detected by the room temperature thermistor 42 is lower than the heating set temperature Ts (NO in S10 of FIG. 7, YES in S22). In addition, the second heat storage and heating simultaneous operation (see FIG. 6) is executed. When the second heat storage and heating simultaneous operation is to be performed, the required heating capacity is higher than when the first heat storage and heating simultaneous operation is to be performed (YES in S10 in FIG. 7 and YES in S12). high. In such a case, the hot water supply and heating system 2 of the present embodiment can cover the heat of the heat medium supplied to the heating terminal 56 with the combustion heat of the burner 52 by executing the second heat storage and heating simultaneous operation. The heat for heating the water in the tank 62 can be covered by the heat applied from the refrigerant in the heat medium heat exchanger 16. In general, the heating capacity of the burner 52 that burns fuel (that is, the heating amount per unit time) is higher than the heating capacity by heat exchange with the refrigerant in the heat medium heat exchanger 16. Therefore, it becomes easier to ensure sufficient heat storage capacity and heating capacity compared to the situation where the heat storage capacity and heating capacity must be covered only by the capacity of the compressor 12. Therefore, in the hot water supply and heating system 2 of the present embodiment, in the case where the simultaneous heat storage and heating operation is to be executed, when the required heating capacity is high, the occurrence of a situation where the necessary heat storage capacity and heating capacity are insufficient is suppressed. Can do.

  Moreover, in the said Example, the rotation speed R4 per unit time of the 1st pump 54 in the case of performing 1st heat storage heating simultaneous operation (refer FIG. 5) is 2nd heat storage heating simultaneous operation (refer FIG. 6). The number of rotations per unit time R3 of the first pump 54 in the case of performing is smaller (R4 <R3). As a result, when the first heat storage heating simultaneous operation that does not require high heating capacity is performed, more heat is applied from the refrigerant to the heat medium in the second heat medium circuit 60 in the heat medium heat exchanger 16. become. Therefore, heat storage in the tank 62 can be appropriately performed.

  Further, in the hot water supply and heating system 2 of the present embodiment, when the heating single operation is to be executed, when the room temperature detected by the room temperature thermistor 42 is lower than the heating set temperature Ts (NO in S10 of FIG. 7, NO in S22) , And S24), the second heating independent operation (see FIG. 4) is executed. When the second heating independent operation is to be executed, it is required as compared with the case where the first heating independent operation is to be executed (YES in S10, NO in S12, and YES in S14). High heating capacity. In such a case, the hot water supply / heating system 2 of the present embodiment executes the second heating independent operation, whereby the heat of the heat medium supplied to the heating terminal 56 is exchanged with the combustion heat of the burner 52 for heat medium heat exchange. It can be provided by both the heat applied from the refrigerant in the vessel 16. That is, it becomes easier to ensure a sufficient heating capacity as compared with the case where the heating capacity must be covered only by the heat applied from the refrigerant. Therefore, in the hot water supply and heating system 2 according to the present embodiment, when a single heating operation is to be performed and the required heating capacity is high, it is possible to suppress the occurrence of a situation where the required heating capacity is insufficient.

  Moreover, the hot water supply and heating system 2 of the present embodiment can perform heating (air heating) by the indoor air heat exchanger 26 in addition to heating (floor heating) by the heating terminal 56 during the heating operation (FIG. 5). 3 to FIG. 6). According to the hot water supply and heating system 2 of the present embodiment, the room can be more comfortably heated by using the floor heating and the air heating together.

  Moreover, in the hot water supply and heating system 2 of the present embodiment, the flow rate adjustment is performed so that the flow rate of the refrigerant supplied to the port f is larger than the flow rate of the refrigerant supplied to the port g when performing the heat storage and heating simultaneous operation. The opening degree of the valve 14 is adjusted (that is, f> g, see FIGS. 5 and 6). Thereby, in the hot-water supply heating system 2 of a present Example, when performing a thermal storage heating simultaneous operation, the high-temperature / high pressure refrigerant | coolant after compressing with the compressor 12 can be supplied more by the heat-medium heat exchanger 16. FIG. . More refrigerant heat can be supplied to the tank 62 than in the case where the heating single operation is performed. Therefore, according to this structure, when performing heat storage heating simultaneous operation, the room | chamber interior can be heated appropriately, increasing the heat quantity in the tank 62 appropriately.

  Here, the correspondence between the description of the embodiment and the description of the claims will be described. The hot water supply and heating system 2 is an example of a “heat pump system”. The heat pump air conditioner 4 is an example of a “heat pump”. The heat medium heat exchanger 16 is an example of a “first heat exchanger” and a “second heat exchanger”. The first expansion valve 18 and the second expansion valve 30 are examples of the “decompression mechanism”. The outdoor air heat exchanger 20 is an example of an “evaporator”. The heating terminal 56 is an example of a “heating terminal”. The first heating medium circulation path 50 and the heating medium circulating in the first heating medium circulation path 50 are examples of the “heating circulation path” and the “first heating medium”, respectively. The second heat medium circulation path 60 and the heat medium circulating through the second heat medium circulation path 60 are examples of the “tank circulation path” and the “second heat medium”, respectively. The burner 52 is an example of a “heat source machine”. The switching valve 70 is an example of “switching means”. The hot water supply pipe 66 is an example of “supply means”. The flow rate adjustment valve 14 is an example of an “adjustment unit”. The case where S10 in FIG. 7 is YES and the case where S12 is YES is an example of “first case”, and the first simultaneous heat storage and heating operation (FIG. 5) is an example of “first operation”. The case where S10 in FIG. 7 is NO and the case where S22 is YES is an example of the “second case”, and the second heat storage and heating simultaneous operation (FIG. 6) is an example of the “second operation”. The case of YES in S10 of FIG. 7, NO in S12, and YES in S14 is an example of “third case”, and the first heating independent operation (FIG. 3) is an example of “third operation”. The case of NO in S10, NO in S22, and YES in S24 is an example of the “fourth case”, and the second heating independent operation (FIG. 4) is an example of the “fourth operation”.

  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.

(Modification 1) In the above embodiment, the second heat medium circulation path 60 of the hot water supply device 7 passes through the tank 62 and the heat medium heat exchanger 16 and circulates the heat medium. The second heat medium circuit 60 is not limited to this, and the water in the tank 62 is directly derived and sent to the heat medium heat exchanger 16, and heat exchange with the refrigerant is performed in the heat medium heat exchanger 16. The hot water heated by heat exchange with the refrigerant may be returned to the tank 62.

(Modification 2) In the above embodiment, the heat medium heat exchanger 16 exchanges heat between the heat medium passing through the first heat medium circulation path 50 and the refrigerant passing through the refrigerant circulation path 32. At the same time, heat is exchanged between the heat medium passing through the second heat medium circulation path 60 and the refrigerant passing through the refrigerant circulation path 32. Without being limited thereto, a heat exchanger for exchanging heat between the heat medium passing through the first heat medium circulation path 50 and the refrigerant passing through the refrigerant circulation path 32, and the second heat medium circulation path 60. A heat exchanger for exchanging heat between the heat medium passing through the inside and the refrigerant passing through the refrigerant circulation path 32 may be provided separately.

  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 can achieve a plurality of objects at the same time, and has technical usefulness by achieving one of the objects.

2: Hot water supply and heating system 4: Heat pump air conditioner 6: Floor heating device 7: Hot water supply device 8: Control device 12: Compressor 14: Flow rate adjustment valve 16: Heat medium heat exchanger 18: First expansion valve 20: Outdoor air heat Exchanger 22: First fan 26: Indoor air heat exchanger 28: Second fan 30: Second expansion valve 32: Refrigerant circuit 40: Outside temperature thermistor 42: Indoor temperature thermistor 50: First heat medium circuit 52: Burner 54: First pump 56: Heating terminal 58: Bypass passage 60: Second heat medium circulation passage 62: Tank 63: Tank thermistor 64: Second pump 66: Hot water supply pipe 68: Water introduction pipe 70: Switching valve

Claims (4)

A compressor that pressurizes the refrigerant; a first heat exchanger that condenses the refrigerant by heat exchange with the first heat medium; a second heat exchanger that condenses the refrigerant by heat exchange with the second heat medium; A decompression mechanism for depressurization, and a heat pump including an evaporator for evaporating the refrigerant;
A heating terminal for heating the room using the heat of the first heat medium;
A heating circuit for circulating a first heat medium between the first heat exchanger and the heating terminal;
A first pump for circulating the first heat medium in the heating circuit;
A heat source machine for heating the first heat medium circulating in the heating circuit,
Among the heating circuits, a bypass path that connects the upstream side and the downstream side of the first heat exchanger and bypasses the first heat exchanger;
Switching means for switching between a state in which the first heat medium in the heating circulation path flows through the bypass path and a state in which the first heat medium in the heating circulation path does not flow through the bypass path;
A tank that stores heat,
Supply means for supplying hot water to the hot water use location using the heat stored in the tank;
A tank circulation path for circulating the second heat medium between the second heat exchanger and the tank;
A second pump for circulating the second heat medium in the tank circulation path;
A control device,
The control device
In the case of simultaneously performing a heat storage operation for storing heat in the tank by operating the heat pump and operating the second pump, and a heating operation for operating the first pump and heating the room by the heating terminal,
In the first case where the room temperature is equal to or higher than a specific threshold value, the switching unit is set to a state in which the first heat medium in the heating circulation path does not flow through the bypass path, and the first operation that does not operate the heat source unit is executed. ,
In the second case where the indoor temperature is lower than a specific threshold value, the switching unit is set to a state in which the first heat medium in the heating circulation path flows through the bypass path, and the second operation for operating the heat source unit is executed.
Hot water heater. The control device
The number of revolutions per unit time of the first pump when performing the first operation is less than the number of revolutions per unit time of the first pump when performing the second operation;
The hot water heater according to claim 1. The control device
In the case of performing the heating operation of heating the room by the heating terminal by operating the heat pump without operating the heat storage operation and operating the first pump,
In the third case where the indoor temperature is equal to or higher than a specific threshold value, the switching unit is set in a state in which the first heat medium in the heating circulation path does not flow through the bypass path, and the third operation in which the heat source machine is not operated is executed. ,
In the fourth case where the indoor temperature is lower than a specific threshold, the switching unit is set to a state in which the first heat medium in the heating circulation path does not flow through the bypass path, and the fourth operation for operating the heat source unit is executed.
The hot water heater according to claim 1 or 2. The heat pump
An indoor air heat exchanger that condenses the refrigerant by heat exchange with room air;
Adjusting means capable of adjusting the flow rate of the refrigerant supplied to the indoor air heat exchanger and the ratio of the flow rate of the refrigerant supplied to the first heat exchanger and the second heat exchanger;
The control device
When the heat storage operation and the heating operation are performed simultaneously as in the first case and the second case, the ratio of the flow rate of the refrigerant supplied to the first heat exchanger and the second heat exchanger is the third case and the second case. The adjustment means is operated so as to be larger than the ratio of the flow rate of the refrigerant supplied to the first heat exchanger and the second heat exchanger in the case of performing the heating operation alone as in the case of 4.
The hot water heater according to claim 3.

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