JP2016080194A - Heat pump system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat pump capable of properly allocating the ability of a compressor into heating and heat storage.SOLUTION: A hot water supply heating system 2, in a case of executing heat storage and heating simultaneous operation, when an indoor temperature is a heating setting temperature or more, executes a second heat storage and heating simultaneous operation different from a first heat storage and heating simultaneous operation in which a heat medium passes a heating terminal 56. In the second heat storage and heating simultaneous operation, since the heat medium does not pass the heating terminal 56, heating is not performed with the heating terminal 56.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat pump system.

  Patent Document 1 includes a compressor that pressurizes the refrigerant, a heat medium heat exchanger that condenses the refrigerant by heat exchange with the heat medium, a decompression mechanism that depressurizes the refrigerant, and a heat pump that includes an evaporator that evaporates the refrigerant; A heat pump system comprising a heating terminal that heats the room using the heat of the heat medium, a heat storage tank that stores heat, and a supply means that supplies hot water to a hot water use location using the heat stored in the heat storage tank Is disclosed. In this heat pump system, heat storage and heating and heating that simultaneously circulate the heat medium between the heat medium heat exchanger and the heating terminal and heat storage that circulates the heat medium between the heat medium heat exchanger and the heat storage tank are performed simultaneously. Operation can be performed.

JP 2010-196950 A

  In the heat pump system of Patent Document 1, the heating capacity and the heat storage capacity are determined according to the capacity of the compressor. In the heat pump system of Patent Document 1, while performing the heat storage and heating simultaneous operation, both the heating capacity and the heat storage capacity must be covered by the capacity of the compressor. However, in the heat pump system of Patent Document 1, when the simultaneous heat storage and heating operation is executed, it is not considered to appropriately assign the compressor capacity to heating and heat storage.

  In this specification, the heat pump system which can allocate appropriately the capability of a compressor to heating and heat storage is disclosed.

  One heat pump system disclosed in this specification includes a compressor that pressurizes a refrigerant, a heat medium heat exchanger that condenses the refrigerant by heat exchange with the heat medium, a decompression mechanism that depressurizes the refrigerant, and an evaporation that evaporates the refrigerant. A heat pump equipped with a heater, a heating terminal that heats the room using the heat of the heat medium, a heat storage tank that stores heat, and a supply that supplies hot water to the hot water use location using the heat stored in the heat storage tank Means and detection means for detecting the temperature in the room. The heat pump system simultaneously stores the first heating for circulating the heat medium between the heat medium heat exchanger and the heating terminal, and the heat storage for circulating the heat medium between the heat medium heat exchanger and the heat storage tank. In the first case where the simultaneous heating operation can be performed and the thermal storage heating simultaneous operation is being performed and the temperature detected by the detection means is equal to or higher than the specific temperature, the thermal storage heating simultaneous operation is being performed and detected. Compared with the second case where the temperature detected by the means is lower than the specific temperature, the heating capacity is reduced.

  In the first case where the indoor temperature is equal to or higher than the specific temperature in the case where the simultaneous heat storage heating operation is executed (that is, the room is heated and the amount of heat stored in the heat storage tank is increased), the room temperature is The required heating capacity is lower than in the second case lower than the specific temperature. According to said structure, compared with the 2nd case, a heating capability is reduced in the 1st case. Therefore, compared with the 2nd case, the capacity | capacitance of a compressor can be less allocated to heating and can be allocated more by heat storage in the 1st case. Therefore, according to said heat pump system, according to a condition, the capability of a compressor can be appropriately allocated to heating and heat storage.

  In the first case, the heat pump system decreases the heating capacity of the first heating by reducing the flow rate of the heat medium to the heating terminal and increasing the flow rate of the heat medium to the heat storage tank as compared to the second case. It is preferable to make it.

  According to this structure, the capacity | capacitance of a compressor can be appropriately allocated to heating and heat storage by adjusting the heat medium flow volume supplied.

  It is preferable that the heat pump includes an indoor air heat exchanger that heats the room with the heat of the refrigerant by condensing the refrigerant by heat exchange with the room air. When the heat pump system performs the heat storage and heating simultaneous operation, the second heating in which the refrigerant is further circulated in the order of the compressor, the indoor air heat exchanger, the decompression mechanism, and the evaporator is possible. In the first case, Compared to the second case, it is preferable to reduce the heating capacity of the second heating by decreasing the refrigerant flow rate to the indoor air heat exchanger and increasing the refrigerant flow rate to the heat medium heat exchanger.

  According to this configuration, even when the heat pump system has a configuration capable of heating the room using both the heating terminal and the indoor air heat exchanger, the compressor can be adjusted by adjusting the heating capacity of the second heating. Can be appropriately allocated to heating and heat storage.

  Another heat pump system disclosed in the present specification includes a compressor for pressurizing the refrigerant, a heat medium heat exchanger for condensing the refrigerant by heat exchange with the heat medium, and condensing the refrigerant by heat exchange with room air. An indoor air heat exchanger that heats the room with the heat of the refrigerant, a decompression mechanism that depressurizes 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 heat medium, A heat storage tank for storing heat; and a supply means for supplying hot water to a hot water use location using heat stored in the heat storage tank. The heat pump system can perform the heat storage and heating simultaneous operation for simultaneously heating the room and simultaneously storing heat to increase the amount of heat in the heat storage tank. 1st heating which circulates in order of a medium heat exchanger, a decompression mechanism, and an evaporator, and circulates a heat medium between a heat medium heat exchanger and a heating terminal, and a refrigerant, a compressor, an indoor air heat exchanger, The second heating that circulates in the order of the decompression mechanism and the evaporator and the heat storage that circulates the heat medium between the heat medium heat exchanger and the heat storage tank are performed simultaneously, and (i) the first by the heating terminal. When the heating efficiency of the heating is worse than the heating efficiency of the second heating by the indoor air heat exchanger, the heat medium flow rate to the heating terminal is made smaller than the heat medium flow rate to the heat storage tank, and the first heating Reduce heating capacity, (ii) by indoor air heat exchanger When the heating efficiency of the second heating is worse than the heating efficiency of the first heating by the heating terminal, the refrigerant flow rate to the indoor air heat exchanger is made smaller than the refrigerant flow rate to the heat transfer medium heat exchanger. The heating capacity of the second heating is reduced.

  According to said structure, when performing the thermal storage heating simultaneous operation which heats a room using both a heating terminal and an indoor air heat exchanger, the 1st heating by a heating terminal and the 2nd heating by an indoor air heat exchanger are performed. Of these, the heating capacity of the one with the lower heating efficiency can be suppressed, and the capacity of the compressor can be allocated more for heat storage. In addition, since the heating capability with the better heating efficiency is not suppressed, the heating requirement of the indoor user can be satisfied.

  Another heat pump system disclosed in the present specification includes a compressor for pressurizing the refrigerant, a heat medium heat exchanger for condensing the refrigerant by heat exchange with the heat medium, and condensing the refrigerant by heat exchange with room air. An indoor air heat exchanger that heats the room with the heat of the refrigerant, a decompression mechanism that depressurizes 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 heat medium, A heat storage tank for storing heat; and a supply means for supplying hot water to a hot water use location using heat stored in the heat storage tank. The heat pump system can perform the heat storage and heating simultaneous operation for simultaneously heating the room and simultaneously storing heat to increase the amount of heat in the heat storage tank. 1st heating which circulates in order of a medium heat exchanger, a decompression mechanism, and an evaporator, and circulates a heat medium between a heat medium heat exchanger and a heating terminal, and a refrigerant, a compressor, an indoor air heat exchanger, The second heating that circulates in the order of the decompression mechanism and the evaporator and the heat storage that circulates the heat medium between the heat medium heat exchanger and the heat storage tank are performed simultaneously, and (a) the heating terminal is indoors In the case where it is provided at a position higher than the indoor air heat exchanger, the heating medium flow rate to the heating terminal is made smaller than the heating medium flow rate to the heat storage tank, and the heating capacity of the first heating is lowered. (B) the indoor air heat exchanger is warmed in the room. When provided at a position higher than the terminal, the refrigerant flow rate to the indoor air heat exchanger, with less than the flow rate of refrigerant to Netsunakadachinetsu exchanger, reducing the heating capacity of the second heating.

  According to said structure, when performing the thermal storage heating simultaneous operation which heats a room | chamber interior using both a heating terminal and an indoor air heat exchanger, it is higher indoors among an indoor air heat exchanger and a heating terminal. The capacity of heating by the person provided at the position can be suppressed, and the capacity of the compressor can be allocated more for heat storage. In general, when a room is heated, indoor users are more likely to be heated using a terminal provided at a lower position in the room than when heated using a terminal provided at a higher position. Highly likely to feel comfortable. In said heat pump system, since the heating capability of the one provided in the indoor low position is not suppressed, the indoor user's heating requirement can be satisfied.

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 heating independent driving | operation in the hot-water supply heating system. The figure which shows typically the mode of the 1st heat storage heating simultaneous operation in the hot-water supply heating system. The figure which shows typically the mode of the 2nd thermal storage heating simultaneous operation in the hot-water supply heating system. The figure which shows typically the mode of the 3rd thermal storage heating simultaneous driving | operation in the hot-water supply heating system. The flowchart which shows the thermal storage heating control process which the control apparatus 8 performs in 1st Example. The flowchart which shows the thermal storage heating control process which the control apparatus 8 performs in 2nd, 3rd Example.

(First embodiment)
(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 hot water supply floor heater 6, 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 a, b, and c, and can supply the refrigerant in the gas phase supplied from the compressor 12 to the port a to the ports b and c. The flow rate adjusting valve 14 adjusts the opening degree to adjust the flow rate of the refrigerant flowing from the port a to the port c (that is, the refrigerant supplied to the heat medium heat exchanger 16) and the refrigerant flowing from the port a to the port b (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 heat medium circulation path 50 described later and a refrigerant passing through the refrigerant circulation path 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. The second expansion valve 30 is circulated.

  The hot water supply floor heater 6 radiates heat to indoor air (so-called floor heating) using heat of a heat medium (for example, water, antifreeze liquid, etc.) and heats water in the tank 62 using heat of the heat medium. Then, the hot water stored in the tank 62 is supplied to the hot water use location. The hot water floor heater 6 includes a heat medium heat exchanger 16, a heat medium circulation path 50, a flow rate adjustment valve 52, a pump 54, a heating terminal 56, a tank 62, a tank thermistor 63, and a hot water supply pipe 66. And a water introduction pipe 68.

  The heat medium circulation path 50 circulates the heat medium among the heat medium heat exchanger 16, the heating terminal 56, and the tank 62. The flow rate adjusting valve 52 includes three ports d, e, and f, and can supply a high-temperature heat medium supplied from the heat medium heat exchanger 16 to the port d to the port e and the port f. . The flow rate adjusting valve 52 adjusts the opening degree to thereby adjust the flow rate of the heat medium flowing from the port d to the port e (that is, the heat medium supplied to the tank 62) and the heat medium flowing from the port d to the port f (that is, heating). The ratio of the flow rate of the heat medium supplied to the terminal 56 can be adjusted. The pump 54 circulates the heat medium in the heat medium circuit 50. The heating terminal 56 radiates the heat of the heat medium into the room. The heating terminal 56 is a floor heating terminal arranged on the indoor floor. That is, the heating terminal 56 is provided indoors at a position lower than the indoor air heat exchanger 26. The heating terminal 56 is provided on the downstream side of the heat medium heat exchanger 16 in the heat medium circuit 50. Therefore, the heating medium after being heated by the heat medium heat exchanger 16 is supplied to the heating terminal 56. The heat medium heat exchanger 16 is provided in a portion of the heat medium circulation path 50 on the downstream side of the heating terminal 56 and the tank 62. The heat medium heat exchanger 16 is supplied with a low-temperature heat medium that has radiated heat in one or both of the heating terminal 56 and the tank 62.

  The tank 62 stores water used at the hot water use location via the hot water supply pipe 66. The tank 62 is a sealed type, and the outside is covered with a heat insulating material. A heating medium circulation path 50 is passed through the tank 62. The water in the tank 62 is heated by heat exchange between the heat medium in the heat medium circulation path 50 passing through the tank 62 and the water in the tank 62. 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 in accordance with 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 and the hot water supply floor heating device 6 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.

(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 / heating system 2 includes a hot water supply operation, a single heat storage operation, a single heating operation, and a simultaneous heat storage heating operation (that is, a first heat storage heating simultaneous operation, a second heat storage heating simultaneous operation, and a third heat storage 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 adjusts the flow rate adjustment valve 14 so that the total flow rate of the refrigerant supplied to the port a is supplied to the port c and not supplied to the port b ( That is, port a and port c communicate, and port a and port b do not communicate). The control device 8 drives the first fan 22 and the compressor 12. Further, the control device 8 causes the flow rate adjusting valve 52 to supply the total flow rate of the heat medium supplied to the port d to the port e (that is, the tank 62 side), and to the port f (that is, the heating terminal 56 side). Adjust so that the heat medium is not supplied (that is, port d and port e communicate with each other, and port d and port f do not communicate with each other). Further, the control device 8 drives the pump 54.

  The refrigerant in the vapor phase that has been pressurized by the compressor 12 to a high temperature and high pressure is sent to the heat medium heat exchanger 16 via the flow rate adjustment valve 14 (port c). 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 circulation path 50 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.

  Further, when the pump 54 is driven, the heat medium circulates in the 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 tank 62 via the flow rate adjustment valve 52 (port e). 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; Fig. 3)
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. As shown in FIG. 3, in the heating independent operation, the control device 8 uses the flow rate adjustment valve 14, a part of the refrigerant supplied to the port a is supplied to the port b, and the other part is supplied to the port c. The opening degree is adjusted so that port a and port b and port a and port c 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 b and the flow rate of the refrigerant supplied to the port c are substantially equal (that is, b = c). Further, the control device 8 drives the first fan 22 and the second fan 28 and drives the compressor 12. Further, the control device 8 causes the flow rate adjusting valve 52 to supply the total flow rate of the heat medium supplied to the port d to the port f (that is, the heating terminal 56 side), and to the port e (that is, the tank 62 side). Adjust so that the heat medium is not supplied (that is, port d and port f communicate with each other, and port d and port e do not communicate with each other). Further, the control device 8 drives the pump 54.

  A part of the refrigerant in a gas phase that has been pressurized by the compressor 12 to become a high temperature and a high pressure is sent to the indoor air heat exchanger 26 via the flow rate adjusting valve 14 (port b). 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 c). 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.

  Further, when the pump 54 is driven, the heat medium circulates in the 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 through the flow rate adjustment valve 52 (port f). 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 pump 54 and is heated again by heat exchange with the refrigerant.

  In the heating-only operation, the hot water supply / heating system 2 can heat the room by both the indoor air heat exchanger 26 and the heating terminal 56 by circulating the refrigerant and the heat medium in the above cycle.

(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. In the present embodiment, the hot water supply and heating system 2 can perform different operations of regenerative heating and heating simultaneously depending on whether or not the room temperature is equal to or higher than the heating set temperature Ts. Hereinafter, the contents of three simultaneous heat storage heating operations (first heat storage heating simultaneous operation, second heat storage heating simultaneous operation, and third heat storage heating simultaneous operation) will be described.

(First heat storage and heating simultaneous operation; Fig. 4)
In the present embodiment, the first heat storage and heating simultaneous operation is executed when the indoor temperature detected by the room temperature thermistor 42 is lower than the heating set temperature Ts when the hot water supply and heating system 2 should execute the heat storage and heating simultaneous operation. Driving. 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, 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 a is supplied to the port b, and the other part is the port. The opening is adjusted so as to be supplied to c (that is, port a and port b, and port a and port c 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 b and the flow rate of the refrigerant supplied to the port c are substantially equal. Further, the control device 8 drives the first fan 22 and the second fan 28 and drives the compressor 12. Further, the control device 8 adjusts the opening degree of the flow rate adjustment valve 52 so that a part of the heat medium supplied to the port d is supplied to the port e and the other part is supplied to the port f ( That is, port d and port e, and port d and port f communicate with each other). At this time, the control device 8 adjusts the opening degree of the flow rate adjusting valve 52 so that the flow rate of the heat medium supplied to the port e and the flow rate of the heat medium supplied to the port f become substantially equal. Further, the control device 8 drives the pump 54.

  Since the movement of the refrigerant due to the driving of the compressor 12 is the same as that in the case of the above heating single operation (see FIG. 3), detailed description thereof is omitted.

  In the first simultaneous heat storage and heating operation, the heat medium circulates in the heat medium circulation path 50 by driving the pump 54. A part of 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 flow rate adjustment valve 52 (port f). 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 pump 54 and is heated again by heat exchange with the refrigerant. Further, another part of 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 tank 62 via the flow rate adjustment valve (port e). 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.

  In the first heat storage and heating simultaneous operation, the hot water supply and heating system 2 can heat the room by both the indoor air heat exchanger 26 and the heating terminal 56 by circulating the refrigerant and the heat medium in the above cycle. In addition, 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 the above-described operation after the end of the first simultaneous heat storage and heating operation. Execute heating alone.

(Second heat storage and heating simultaneous operation; FIG. 5)
In the present embodiment, the second simultaneous heat storage and heating operation is executed when the indoor temperature detected by the indoor temperature thermistor 42 is equal to or higher than the heating set temperature Ts when the hot water supply and heating system 2 should execute the simultaneous heat storage and heating operation. Driving. 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. 5, in the second 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 a is supplied to the port b, and the other part is the port. The opening is adjusted so as to be supplied to c (that is, port a and port b, and port a and port c communicate with each other). Even in the second simultaneous heat storage and heating operation, the control device 8 controls the opening degree of the flow rate adjustment valve 14 so that the flow rate of the refrigerant supplied to the port b and the flow rate of the refrigerant supplied to the port c are substantially equal. adjust. Further, the control device 8 drives the first fan 22 and the second fan 28 and drives the compressor 12. Further, the control device 8 causes the flow rate adjusting valve 52 to supply the total flow rate of the heat medium supplied to the port d to the port e (that is, the tank 62 side), and to the port f (that is, the heating terminal 56 side). Adjust so that the heat medium is not supplied (that is, port d and port e communicate with each other, and port d and port f do not communicate with each other). Further, the control device 8 drives the pump 54.

  Since the movement of the refrigerant due to the driving of the compressor 12 is the same as that in the case of the above-described single heating operation (see FIG. 3) and the above-described first simultaneous heat storage and heating operation (see FIG. 4), detailed description will be given. Is omitted. Further, the movement of the heat medium due to the driving of the pump 54 is the same as that in the case of the single heat storage operation (see FIG. 2), and thus detailed description thereof is omitted.

  In the second simultaneous heat storage and heating operation, the hot water supply and heating system 2 heats the room by radiating the indoor air heat exchanger 26 to the indoor air by circulating the refrigerant and the heat medium in the above cycle. The hot water can be stored in the tank 62. In the second heat storage and heating simultaneous operation, the heating medium does not pass through the heating terminal 56, and thus the heating by the heating terminal 56 is not performed. Therefore, the heating capacity of the entire system (that is, the amount of heat released into the room per unit time) is lower than that in the first simultaneous heat storage and heating operation. However, since the entire amount of the high-temperature heat medium heated by heat exchange with the refrigerant in the heat medium heat exchanger 16 passes through the tank 62, the heat storage capacity (that is, compared with the first heat storage heating simultaneous operation) The amount of heat released to the water in the tank 62 per unit time) becomes high. As described above, in the present embodiment, when the second heat storage and heating simultaneous operation is to be performed, the required heating capacity is lower than when the first heat storage and heating simultaneous operation is to be performed. In this respect, in the second simultaneous heat storage and heating operation, the heating capacity of the entire system can be lowered and the heat storage capacity can be increased as compared with the first simultaneous heat storage and heating operation. Depending on the situation, the capacity of the compressor 12 can be appropriately allocated to heat storage and heating.

  In addition, after starting the 2nd heat storage heating simultaneous operation, the control apparatus 8 will complete | finish a 2nd heat storage heating simultaneous operation, if the temperature which the tank thermistor 63 detects reaches predetermined | prescribed heat storage end temperature. At this time, when the heating operation instruction is continuously performed, the control device 8 continuously performs the above-described heating single operation after the second simultaneous heat storage and heating operation ends.

(Third heat storage and heating simultaneous operation; FIG. 6)
The third heat storage heating simultaneous operation is a modification of the present embodiment described later. When the hot water supply / heating system 2 should execute the heat storage heating simultaneous operation, the room temperature detected by the room temperature thermistor 42 is equal to or higher than the heating set temperature Ts. The operation is executed when As shown in FIG. 6, in the third heat storage and heating simultaneous operation, the flow rate adjustment valve 14 is adjusted so that the total flow rate of the refrigerant supplied to the port a is supplied to the port c and the refrigerant is not supplied to the port b. (That is, port a and port c communicate with each other, and port a and port b do not communicate with each other). The control device 8 drives the first fan 22 and drives the compressor 12 (the second fan 28 is not driven). Further, the control device 8 adjusts the opening degree of the flow rate adjustment valve 52 so that a part of the heat medium supplied to the port d is supplied to the port e and the other part is supplied to the port f ( That is, port d and port e, and port d and port f communicate with each other). At this time, the control device 8 adjusts the opening degree of the flow rate adjusting valve 52 so that the flow rate of the heat medium supplied to the port e and the flow rate of the heat medium supplied to the port f become substantially equal. Further, the control device 8 drives the pump 54.

  Since the movement of the refrigerant due to the driving of the compressor 12 is the same as in the case of the single heat storage operation (see FIG. 2), detailed description thereof is omitted. Moreover, since the movement of the heat medium by driving the pump 54 is the same as in the case of the first heat storage and heating simultaneous operation (see FIG. 3), detailed description thereof is omitted.

  In the third heat storage and heating simultaneous operation, the hot water supply and heating system 2 can heat the room by the heating terminal 56 and circulate hot water in the tank 62 by circulating the refrigerant and the heat medium in the above cycle. Can be stored. In the third heat storage and heating simultaneous operation, since the refrigerant is not supplied to the indoor air heat exchanger 26, heating by the indoor air heat exchanger 26 is not performed. Therefore, the heating capacity of the entire system is lower than that in the first simultaneous heat storage and heating operation. However, since the entire amount of the refrigerant in the gas phase, which is pressurized by the compressor 12 and becomes high-temperature and high-pressure, passes through the heat-medium heat exchanger 16, the heat medium is compared with the first heat storage heating simultaneous operation. In the heat exchanger 16, the amount of heat applied to the heat medium increases. As a result, the heat storage capacity is higher than that in the first simultaneous heat storage and heating operation. As described above, when the third regenerative heating simultaneous operation is to be performed, the required heating capacity is lower than when the first regenerative heating simultaneous operation is to be performed. In this regard, in the third heat storage and heating simultaneous operation, the heating capacity of the entire system can be lowered and the heat storage capacity can be increased as compared with the first heat storage and heating simultaneous operation. The capacity of the compressor 12 can be appropriately allocated to heat storage and heating.

(Heat storage heating control process in the first embodiment; FIG. 7)
When heating is instructed by the user, which one of the heating single operation and each heat storage 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 (See FIG. 7). Hereinafter, in the present embodiment, 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 heating control process is started, in S10, the control device 8 determines that the temperature of the water in the tank 62 detected by the tank thermistor 63 (hereinafter sometimes referred to as “tank temperature”) is a predetermined heat storage start. Determine whether the temperature is lower.

  When the tank temperature is lower than the heat storage start temperature at the time of S10, the control device 8 determines YES in S10, and proceeds to S12. The case of YES in S10 is a case where a heat storage request to the tank 62 is generated. On the other hand, when the tank temperature is equal to or higher than the heat storage start temperature, the control device 8 determines NO in S10, and proceeds to S11. If NO in S10, the heat storage request to the tank 62 has not occurred. In this case, in S11, the control apparatus 8 performs heating independent operation (refer FIG. 3). If the heating single operation has already been performed at the time of S11, the heating single operation is continued. Thereafter, the control device 8 returns to S10.

  In S12, 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 S12, and proceeds to S14. In the present embodiment, the case of YES in S12 is a case where the room temperature has reached the heating set temperature Ts requested by the user and a high heating capacity is not required. In this case, in S14, the control device 8 executes the second heat storage and heating simultaneous operation (see FIG. 5). When the second heat storage and heating simultaneous operation has already been performed at the time of S14, the second heat storage and heating simultaneous operation is continued. Thereafter, the control device 8 proceeds to S20.

  On the other hand, when the room temperature is lower than the heating set temperature Ts at the time of S12, the control device 8 determines NO in S12, and proceeds to S16. In the present embodiment, the case of NO in S10 is a case where the room temperature has not reached the heating set temperature Ts requested by the user and a high heating capacity is required. In this case, in S16, the control device 8 executes the first heat storage and heating simultaneous operation (see FIG. 4). 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 proceeds to S20.

  In S20, 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 equal to or higher than the heat storage end temperature at the time of S20, the control device 8 determines YES in S20 and returns to S10. The case of YES in S20 is a case where the boiling of water in the tank 62 has been completed. On the other hand, when the tank temperature is lower than the heat storage end temperature at S20, the control device 8 determines NO in S20 and returns to S12. In the case of NO in S20, either the second heat storage heating simultaneous operation (S14) or the first heat storage heating simultaneous operation (S16) has already been performed, but the boiling of water in the tank 62 has been completed. This is the case.

  The control device 8 repeatedly executes the heat storage heating process (S10 to S20) 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 process.

  Heretofore, the configuration and operation details of the hot water supply / heating system 2 of the present embodiment have been described. As described above, when the regenerative heating simultaneous operation is to be executed (YES in S10 of FIG. 7), if the room temperature is equal to or higher than the heating set temperature Ts (YES in S12), the room temperature is lower than the heating set temperature Ts. The required heating capacity is lower than in the case (NO in S12). In this regard, the hot water supply / heating system 2 of the present embodiment is configured to perform the first operation when the room temperature is equal to or higher than the heating set temperature (YES in S12) when the simultaneous heat storage and heating operation is to be executed (YES in S10 of FIG. 7). 2 simultaneous heat storage heating operation (refer FIG. 5) is performed. In the second heat storage and heating simultaneous operation, the heating medium does not pass through the heating terminal 56, and thus the heating by the heating terminal 56 is not performed. Therefore, the heating capacity of the entire system (that is, the amount of heat released into the room per unit time) is lower than that in the first simultaneous heat storage and heating operation. However, since the entire amount of the high-temperature heat medium heated by heat exchange with the refrigerant in the heat medium heat exchanger 16 passes through the tank 62, the heat storage capacity (that is, compared to the first simultaneous heat storage and heating operation) The amount of heat released to the water in the tank 62 per unit time) becomes high. Therefore, the hot water supply and heating system 2 of the present embodiment can lower the heating capacity of the entire system and increase the heat storage capacity compared to the first heat storage heating simultaneous operation by performing the second heat storage heating simultaneous operation. it can. Depending on the situation, the capacity of the compressor 12 can be appropriately allocated to heat storage and heating.

  The correspondence between this 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 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 case of YES in S12 of FIG. 7 is an example of “first case”, and the case of NO in S12 is an example of “second case”. The heating set temperature Ts is an example of “specific temperature”. Heating by the heating terminal 56 is an example of “first heating”, and heating by the indoor air heat exchanger 26 is an example of “second heating”.

(Modification 1 of the first embodiment)
As described above, in the first embodiment, the control device 8 executes the second simultaneous heat storage and heating operation in S14 of FIG. In this modification, when the second heat storage and heating simultaneous operation is executed in S14, the control device 8 determines the opening degree of the flow rate adjustment valve 52, and a part of the heat medium supplied to the port d is the port e (tank 62 side) and the other part is adjusted to be supplied to port f (heating terminal 56 side). At this time, the control device 8 determines the opening degree of the flow rate adjustment valve 52, the flow rate of the heat medium supplied to the port e (tank 62 side), and the flow rate of the heat medium supplied to the port f (heating terminal 56 side). (Ie, e> f). In this case, a part of the heat medium is also supplied to the heating terminal 56. However, the flow rate of the heat medium supplied to the heating terminal 56 in the second simultaneous heat storage heating operation of S14 is smaller than the flow rate of the heat medium supplied to the heating terminal 56 in the first simultaneous heat storage heating operation of S16. Therefore, also in this case, the heating capacity of the entire system is lower than in the first simultaneous heat storage operation of S16. However, since most of the high-temperature heat medium heated by heat exchange with the refrigerant in the heat medium heat exchanger 16 passes through the tank 62, the heat storage capacity is higher than in the first simultaneous heat storage and heating operation. Become. Therefore, also in the case of this modification 1, the same effect as the first embodiment can be exhibited.

(Modification 2 of the first embodiment)
The control device 8 may execute the third heat storage and heating simultaneous operation (see FIG. 6) in S14 of FIG. As described above, in the third heat storage and heating simultaneous operation, since the refrigerant is not supplied to the indoor air heat exchanger 26, the indoor air heat exchanger 26 is not heated. Therefore, the heating capacity of the entire system is lower than that in the first simultaneous heat storage and heating operation. However, in this case as well, since the entire amount of the refrigerant in the gas phase that has been pressurized by the compressor 12 to become high temperature and high pressure passes through the heat medium heat exchanger 16, it is compared with the first heat storage heating simultaneous operation. Thus, the heating amount of the heat medium passing through the heat medium circulation path 50 is increased. As a result, the heat storage capacity is higher than that in the first simultaneous heat storage and heating operation. That is, even in the third heat storage and heating simultaneous operation, the heating capacity of the entire system can be lowered and the heat storage capacity can be increased compared to the first heat storage and heating simultaneous operation. Similar to the first embodiment, the capacity of the compressor 12 can be appropriately allocated to heat storage and heating.

(Modification 3 of the first embodiment)
As described above, in the second modification, the control device 8 performs the third heat storage and heating simultaneous operation in S14 of FIG. In this modification, when the third heat storage and heating simultaneous operation is executed in S14, the control device 8 determines the degree of opening of the flow rate adjustment valve 14 so that a part of the refrigerant supplied to the port a is the port c (heat medium). It adjusts so that it may be supplied to the heat exchanger 16 side, and other one part may be supplied to the port b (indoor air heat exchanger 26 side). At this time, the control device 8 supplies the opening degree of the flow rate adjusting valve 14 to the port c (heat medium heat exchanger 16 side) and the refrigerant flow rate supplied to the port b (indoor air heat exchanger 26 side). It adjusts so that it may become larger than the flow volume of the refrigerant | coolant (namely, c> b). In this case, the indoor air heat exchanger 26 is also partially supplied with the high-temperature and high-pressure refrigerant pressurized by the compressor 12. However, the flow rate of the refrigerant supplied to the indoor air heat exchanger 26 in the third simultaneous heat storage heating operation of S14 is the flow rate of the refrigerant supplied to the indoor air heat exchanger 26 in the first simultaneous heat storage heating operation of S16. Smaller than. Therefore, also in this case, the heating capacity of the entire system is lower than in the first simultaneous heat storage operation of S16. However, since most of the refrigerant that has been pressurized by the compressor 12 and has become high temperature and high pressure passes through the heat medium heat exchanger 16, the heat storage capacity is higher than that in the first simultaneous heat storage and heating operation. Therefore, also in the case of the third modification, the same effect as that of the second modification can be exhibited.

(Second embodiment)
A description will be given centering on differences from the first embodiment. The configuration of the hot water supply and heating system 2 of this embodiment is common to the hot water supply and heating system 2 of the first embodiment (see FIG. 1). However, in this embodiment, the heating efficiency by the heating terminal 56 (that is, floor heating) is lower than the heating by the room air heat exchanger 26 (that is, air heating) (that is, indoors per unit time). Less heat dissipation). In a situation where such a premise exists, as shown in FIG. 8, when heat storage heating simultaneous operation is to be performed (YES in S30 of FIG. 8), heat storage without heating by the heating terminal 56 having relatively poor heating efficiency. Simultaneous heating operation (that is, second heat storage heating simultaneous operation) is performed.

(Heat storage heating control process in the second embodiment; FIG. 8)
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 heating control process is started, in S30, the control device 8 determines whether or not the tank temperature is lower than a predetermined heat storage start temperature. Since the determination in S30 is the same as that in S10 of FIG. 7, detailed description thereof is omitted.

  In the case of YES in S30, the process proceeds to S32, and the control device 8 executes the second heat storage heating operation (see FIG. 5). When S32 ends, the process proceeds to S36. In S36, the control device 8 determines whether or not the tank temperature is equal to or higher than a predetermined heat storage end temperature. Since the determination in S36 is the same as that in S20 of FIG. 7, detailed description thereof is omitted. If YES in S36, the process returns to S10. If NO in S36, the process returns to S32 and the second heat storage heating operation is continued.

  On the other hand, in the case of NO in S30, the process proceeds to S34, and the control device 8 executes the heating independent operation (see FIG. 3). When S34 ends, the process returns to S30.

  The hot water supply and heating system 2 of the present embodiment executes the second regenerative heating simultaneous operation without performing the heating terminal 56 having relatively poor heating efficiency when the regenerative heating simultaneous operation is to be performed (YES in S30 of FIG. 8). (S32). Therefore, also in a present Example, when performing a thermal storage heating simultaneous operation, the capability of the compressor 12 can be allocated less by heating and can be allocated more by thermal storage. Moreover, since the heating capability of the heating by the indoor air heat exchanger 26 having relatively good heating efficiency is not suppressed, the heating requirement of the indoor user can be satisfied. That is, the hot water supply and heating system 2 of the present embodiment can appropriately allocate the capacity of the compressor 12 to heating and heat storage according to the situation.

(Modification 1 of the second embodiment)
As described above, in the second embodiment, the control device 8 executes the second simultaneous heat storage and heating operation in S32 of FIG. In this modification, when the second heat storage and heating simultaneous operation is executed in S32, the control device 8 determines the degree of opening of the flow rate adjustment valve 52, and part of the heat medium supplied to the port d is the port e (tank 62 side) and the other part is adjusted to be supplied to port f (heating terminal 56 side). At this time, the control device 8 determines the opening degree of the flow rate adjustment valve 52, the flow rate of the heat medium supplied to the port e (tank 62 side), and the flow rate of the heat medium supplied to the port f (heating terminal 56 side). (Ie, e> f). Also in this case, the heating capability of the heating terminal 56 can be reduced as compared with the case where the heating single operation is performed. In addition, since most of the high-temperature heat medium heated by heat exchange with the refrigerant in the heat medium heat exchanger 16 passes through the tank 62, most of the capacity of the compressor 12 can be assigned to heat storage. Therefore, also in the case of this modification 1, the same effect as the second embodiment can be exhibited.

(Modification 2 of the second embodiment)
Contrary to the case of the second embodiment described above, it is assumed that heating by the indoor air heat exchanger 26 (ie, air heating) is less efficient than heating by the heating terminal 56 (ie, floor heating). In the existing situation, the control device 8 may execute the third heat storage and heating simultaneous operation (see FIG. 6) in S32 of FIG. In this case, heating by the indoor air heat exchanger 26 with poor heating efficiency is not performed. Therefore, when the heat storage and heating simultaneous operation should be executed, the capacity of the compressor 12 can be allocated less for heating and more for heat storage. Moreover, since the heating capability of the heating by the heating terminal 56 having relatively good heating efficiency is not suppressed, the heating request of the indoor user can be satisfied. In the case of the second modification, the same effect as that of the second embodiment can be exhibited.

(Modification 3 of the second embodiment)
As described above, in the second modification, in S32 of FIG. 8, the third regenerative heating simultaneous operation is performed in which heating by the indoor air heat exchanger 26 with poor heating efficiency is not performed. In the present modification, when the third heat storage and heating simultaneous operation is executed in S32, the control device 8 determines the degree of opening of the flow rate adjustment valve 14 so that a part of the refrigerant supplied to the port a is the port c (heating medium). It adjusts so that it may be supplied to the heat exchanger 16 side, and other one part may be supplied to the port b (indoor air heat exchanger 26 side). At this time, the control device 8 supplies the opening degree of the flow rate adjusting valve 14 to the port c (heat medium heat exchanger 16 side) and the refrigerant flow rate supplied to the port b (indoor air heat exchanger 26 side). It adjusts so that it may become larger than the flow volume of the refrigerant | coolant (namely, c> b). Also in this case, the heating capacity of the indoor air heat exchanger 26 can be reduced as compared with the case where the heating single operation is performed. In addition, since most of the refrigerant that has been pressurized by the compressor 12 to become high temperature and high pressure passes through the heat medium heat exchanger 16, the heat storage capacity is increased. Therefore, also in the case of the third modification, the same effect as that of the second modification can be exhibited.

(Third embodiment)
The difference from the second embodiment will be mainly described. The configuration of the hot water supply and heating system 2 of this embodiment is also common to the hot water supply and heating system 2 of the first and second embodiments (see FIG. 1). As described above, in the hot water supply and heating system 2 of the present embodiment, the indoor air heat exchanger 26 is provided at a position higher than the heating terminal 56 (a so-called floor heating terminal) in the room. In this embodiment, when the regenerative heating simultaneous operation is to be performed (YES in S30 in FIG. 8), the regenerative heating simultaneous operation (that is, the first regenerative heating is not performed by the indoor air heat exchanger 26 provided at a higher position). 3 heat storage heating simultaneous operation).

(Heat storage heating control process in the third embodiment; FIG. 8)
The heat storage and heating control process executed by the control device 8 in this embodiment is basically the same as the heat storage and heating control process (see FIG. 8) of the second embodiment. However, in the present embodiment, in S32, the control device 8 executes the third regenerative heating simultaneous operation without heating by the indoor air heat exchanger 26 provided at a higher position in the second embodiment. Is different.

  The hot water supply and heating system 2 of the present embodiment does not perform heating by the indoor air heat exchanger 26 provided at a higher position when the simultaneous heat storage and heating operation is to be executed (YES in S30 of FIG. 8). The heat storage and heating simultaneous operation is executed (S32). Therefore, also in a present Example, when performing heat storage heating simultaneous operation, compared with the case where heating independent operation is performed, the capability of the compressor 12 can be allocated less by heating and can be allocated more by heat storage. In general, when a room is heated, a terminal provided at a higher position (that is, the indoor air heat exchanger 26) is heated by using a terminal provided at a lower position in the room (that is, the heating terminal 56). Compared to heating with), indoor users feel more comfortable. In the third regenerative heating simultaneous operation, the heating capability by the heating terminal 56 provided at a lower position is not suppressed. Therefore, even if the heating capability by the indoor air heat exchanger 26 is suppressed, Can meet the heating requirements of users. That is, the hot water supply and heating system 2 of the present embodiment can appropriately allocate the capacity of the compressor 12 to heating and heat storage according to the situation.

(Modification 1 of the third embodiment)
As described above, in the third embodiment, in S32 of FIG. 8, the third regenerative heating simultaneous operation without executing the heating operation by the indoor air heat exchanger 26 provided at a higher position is executed. In the present modification, when the third heat storage and heating simultaneous operation is executed in S32, the control device 8 determines the degree of opening of the flow rate adjustment valve 14 so that a part of the refrigerant supplied to the port a is the port c (heating medium). It adjusts so that it may be supplied to the heat exchanger 16 side, and other one part may be supplied to the port b (indoor air heat exchanger 26 side). At this time, the control device 8 supplies the opening degree of the flow rate adjusting valve 14 to the port c (heat medium heat exchanger 16 side) and the refrigerant flow rate supplied to the port b (indoor air heat exchanger 26 side). It adjusts so that it may become larger than the flow volume of the refrigerant | coolant (namely, c> b). Also in this case, the heating capacity of the indoor air heat exchanger 26 can be reduced as compared with the case where the heating single operation is performed. In addition, the heat storage capacity is increased. Therefore, also in the case of this modification 3, the same effect as the second embodiment can be exhibited.

(Modification 2 of the third embodiment)
Contrary to the case of the third embodiment, the heating terminal 56 may be provided indoors at a position higher than the indoor air heat exchanger 26. In this case, the control device 8 may execute the second heat storage and heating simultaneous operation (see FIG. 5) in S32 of FIG. In this case, heating by the heating terminal 56 provided at a higher position is not performed. Therefore, when performing heat storage heating simultaneous operation, compared with the case where heating independent operation is performed, the capacity | capacitance of the compressor 12 can be allocated less by heating and can be allocated more by heat storage. Moreover, since the heating capability of the heating by the indoor air heat exchanger 26 provided at a lower position is not suppressed, the heating requirement of indoor users can be satisfied. That is, also in the case of the second modification, the same effect as that of the third embodiment can be exhibited.

(Modification 3 of the third embodiment)
As described above, in the second modification, in S32 of FIG. 8, the second regenerative heating simultaneous operation is performed in which heating by the heating terminal 56 provided at a higher position is not performed. In this modification, when the second heat storage and heating simultaneous operation is executed in S32, the control device 8 determines the degree of opening of the flow rate adjustment valve 52, and part of the heat medium supplied to the port d is the port e (tank 62 side) and the other part is adjusted to be supplied to port f (heating terminal 56 side). At this time, the control device 8 determines the opening degree of the flow rate adjustment valve 52, the flow rate of the heat medium supplied to the port e (tank 62 side), and the flow rate of the heat medium supplied to the port f (heating terminal 56 side). (Ie, e> f). Also in this case, the heating capability of the heating terminal 56 can be reduced as compared with the case where the heating single operation is performed. In addition, since most of the high-temperature heat medium heated by heat exchange with the refrigerant in the heat medium heat exchanger 16 passes through the tank 62, most of the capacity of the compressor 12 can be assigned to heat storage. Therefore, also in the case of this modification 3, the same effect as the second embodiment can be exhibited.

  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. For example, the following modifications are included.

(Modification) The heat pump air conditioner 4 may not include the indoor air heat exchanger 26. In that case, in 1st Example, the control apparatus 8 may be made to perform 2nd thermal storage heating simultaneous operation in S14 of FIG.

  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: Hot water supply floor heater 8: Controller 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 circulation path 40: outside temperature thermistor 42: indoor temperature thermistor 50: heating medium circulation path 52: flow rate adjustment valve 54: Pump 56: Heating terminal 62: Tank 63: Tank thermistor 66: Hot water supply pipe 68: Water introduction pipe

Claims (5)

A compressor that pressurizes the refrigerant, a heat medium heat exchanger that condenses the refrigerant by heat exchange with the heat medium, a decompression mechanism that depressurizes the refrigerant, and a heat pump that includes an evaporator that evaporates the refrigerant;
A heating terminal that heats the room using the heat of the heat medium;
A heat storage tank for storing heat;
Supply means for supplying hot water to the hot water use location using heat stored in the heat storage tank;
Detection means for detecting the temperature in the room;
With
Simultaneous heat storage and heating operation is performed to simultaneously perform the first heating that circulates the heat medium between the heat medium heat exchanger and the heating terminal and the heat storage that circulates the heat medium between the heat medium heat exchanger and the heat storage tank. Is possible,
In the first case that the temperature detected by the detection means is equal to or higher than the specific temperature during execution of the simultaneous heat storage heating operation, the temperature detected by the detection means during the simultaneous heat storage heating operation is the specific temperature. Lower heating capacity compared to the lower second case,
Heat pump system. In the first case, as compared with the second case, the heating medium flow rate to the heating terminal is decreased and the heating medium flow rate to the heat storage tank is increased, thereby reducing the heating capacity of the first heating.
The heat pump system according to claim 1. The heat pump includes an indoor air heat exchanger that heats the room with the heat of the refrigerant by condensing the refrigerant by heat exchange with the room air,
When performing the heat storage and heating simultaneous operation, the second heating in which the refrigerant is further circulated in the order of the compressor, the indoor air heat exchanger, the pressure reducing mechanism, and the evaporator is possible.
In the first case, compared with the second case, the flow rate of the refrigerant to the indoor air heat exchanger is decreased and the flow rate of the refrigerant to the heat medium heat exchanger is increased, thereby increasing the heating capacity of the second heating. Reduce,
The heat pump system according to claim 1. A compressor that pressurizes the refrigerant, a heat medium heat exchanger that condenses the refrigerant by heat exchange with the heat medium, and an indoor air heat exchanger that heats the room by the heat of the refrigerant by condensing the refrigerant by heat exchange with the room air A heat pump comprising a decompression mechanism for decompressing the refrigerant, and an evaporator for evaporating the refrigerant;
A heating terminal that heats the room using the heat of the heat medium;
A heat storage tank for storing heat;
Supply means for supplying hot water to the hot water use location using heat stored in the heat storage tank;
With
It is possible to carry out the heat storage and heating simultaneous operation for simultaneously heating the room and simultaneously storing heat to increase the amount of heat in the heat storage tank,
When performing heat storage and heating simultaneous operation, the refrigerant is circulated in the order of the compressor, the heat medium heat exchanger, the decompression mechanism, and the evaporator, and the heat medium is circulated between the heat medium heat exchanger and the heating terminal. First heating to be performed, second heating to circulate the refrigerant in the order of the compressor, the indoor air heat exchanger, the decompression mechanism, and the evaporator, and heat storage to circulate the heat medium between the heat medium heat exchanger and the heat storage tank. Are performed at the same time,
(I) When the heating efficiency of the first heating by the heating terminal is worse than the heating efficiency of the second heating by the indoor air heat exchanger, the heat medium flow rate to the heating terminal is changed to the heat medium flow rate to the heat storage tank. Less to reduce the heating capacity of the first heating,
(Ii) When the heating efficiency of the second heating by the indoor air heat exchanger is worse than the heating efficiency of the first heating by the heating terminal, the refrigerant flow rate to the indoor air heat exchanger is changed to heat medium heat exchange. Less than the flow rate of refrigerant to the unit, to reduce the heating capacity of the second heating,
Heat pump system. A compressor that pressurizes the refrigerant, a heat medium heat exchanger that condenses the refrigerant by heat exchange with the heat medium, and an indoor air heat exchanger that heats the room by the heat of the refrigerant by condensing the refrigerant by heat exchange with the room air A heat pump comprising a decompression mechanism for decompressing the refrigerant, and an evaporator for evaporating the refrigerant;
A heating terminal that heats the room using the heat of the heat medium;
A heat storage tank for storing heat;
Supply means for supplying hot water to the hot water use location using heat stored in the heat storage tank;
With
It is possible to carry out the heat storage and heating simultaneous operation for simultaneously heating the room and simultaneously storing heat to increase the amount of heat in the heat storage tank,
When performing heat storage and heating simultaneous operation, the refrigerant is circulated in the order of the compressor, the heat medium heat exchanger, the decompression mechanism, and the evaporator, and the heat medium is circulated between the heat medium heat exchanger and the heating terminal. First heating to be performed, second heating to circulate the refrigerant in the order of the compressor, the indoor air heat exchanger, the decompression mechanism, and the evaporator, and heat storage to circulate the heat medium between the heat medium heat exchanger and the heat storage tank. Are performed at the same time,
(A) In the case where the heating terminal is provided indoors at a position higher than the indoor air heat exchanger, the heat medium flow rate to the heating terminal is made smaller than the heat medium flow rate to the heat storage tank, Reducing the heating capacity of the first heating;
(B) When the indoor air heat exchanger is provided at a position higher than the heating terminal in the room, the refrigerant flow rate to the indoor air heat exchanger is set to be higher than the refrigerant flow rate to the heat medium heat exchanger. Reduce the heating capacity of the second heating,
Heat pump system.

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