JP2010196955A - Heat pump system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To stably heat an object space in a heat pump system equipped with an air-conditioning portion and a hot water supply portion. <P>SOLUTION: The heat pump system 1 is equipped with a heat source unit 2, a first utilization unit 4a and a second utilization unit 10a connected to the unit 2, a temperature sensor 107a, a temperature difference calculating part 117a, and first and second utilization unit control parts 119a, 120a. The first utilization unit 4a has a first utilization side heat exchanger 41a for coolant-water medium, and the second utilization unit 10a has a second utilization side heat exchanger 101a for coolant-air medium. In the temperature difference calculating part 117a, if the utilization units 4a, 10a are operated together, a temperature difference Tx is calculated between a target set temperature To of the first utilization unit 4a and a detected temperature Tr in the object space sq by the temperature sensor 107a. Each utilization unit control part 119a, 120a controls an operation load of each utilization unit 4a, 10a on the basis of the temperature difference Tx. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a heat pump system.

  Conventionally, as shown in Patent Document 1 (Japanese Patent Laid-Open No. 2000-46417), an air-conditioning part that performs air-conditioning on a target space, a hot-water supply part that heats an aqueous medium, and a hot-water utilization type that is a floor heating panel, for example A system configured by combining heating portions one by one is known. The air-conditioning part includes a heat exchanger that exchanges heat between the refrigerant and the air medium, and the conditioned air after the heat exchange is performed in the heat exchanger is supplied into the target space. On the other hand, the hot water supply portion includes a heat exchanger that exchanges heat between the refrigerant and the aqueous medium, and the hot water-use heating portion uses hot water that has been heat-exchanged by the heat exchanger. Heat the target space. That is, the hot water supply type heating part can heat the target space by performing a hot water supply operation in which the hot water supply part heats water.

  In the above system, when the target space is warmed in both the air-conditioning part and the hot water heating type heating part, the air-conditioning part performs the heating operation and the hot-water supply part performs the hot-water supply operation. However, in this case, the total capacity of the usage-side equipment (that is, the air-conditioning part and the hot water supply part) becomes larger than when the target space is heated only by the air-conditioning part. Then, the capacity of the air-conditioning part that is the user-side equipment and the heat-source-side part to which the hot-water supply part is connected will be insufficient, and in some cases the temperature of the air-conditioned air that the air-conditioning part blows into the target space will decrease, so-called cold draft May occur.

  Therefore, an object of the present invention is to stably heat a target space in a heat pump system including an air conditioning part and a hot water supply part.

  The heat pump system according to the first aspect includes a heat source unit, a first usage unit, a second usage unit, a temperature detection unit, a temperature difference calculation unit, and a control unit. The first usage unit is connected to the heat source unit and has a first usage-side heat exchanger. The first usage-side heat exchanger performs heat exchange between the refrigerant and the aqueous medium. The second usage unit is connected to the heat source unit and has a second usage-side heat exchanger. The second usage-side heat exchanger performs heat exchange between the refrigerant and the air medium. The temperature detection unit detects the temperature of the target space where heating is performed using the aqueous medium heat-exchanged by the first usage-side heat exchanger and the air medium heat-exchanged by the second usage-side heat exchanger. To do. The temperature difference calculation unit calculates a temperature difference between the target set temperature of the first usage unit and the temperature detected by the temperature detection unit when both the first usage unit and the second usage unit are operating. The control unit controls the operation loads of the first usage unit and the second usage unit based on the temperature difference calculated by the temperature difference calculation unit.

  Here, since the 1st utilization unit has the 1st utilization side heat exchanger which performs heat exchange with a refrigerant | coolant and an aqueous medium, it can perform what is called a hot water supply operation which heats an aqueous medium. Since the 2nd utilization unit has the 2nd utilization side heat exchanger which performs heat exchange with a refrigerant and an air medium, the heating operation etc. which heat an air medium can be performed. In this heat pump system, when the target space is heated using, for example, an aqueous medium and an air medium after heat exchange, that is, the first usage unit performs the hot water supply operation and the second usage unit performs the heating operation. When performing, the operation load of a 1st utilization unit and a 2nd utilization unit is controlled based on the temperature difference of the target setting temperature of a 1st utilization unit, and the temperature detected by a temperature detection part. Therefore, it is possible to suppress the possibility that the sum of the operation capacities of the utilization units exceeds the rated heating capacity of the heat source unit, and it is possible to stably heat the target space.

  The heat pump system according to a second aspect of the present invention is the heat pump system according to the first aspect of the present invention, wherein the temperature detection unit is provided in the second usage unit. A control part makes a 2nd utilization unit operate preferentially, when a temperature difference is more than predetermined value. Moreover, a control part makes a 1st utilization unit operate preferentially, when a temperature difference is below a predetermined value.

  In the heat pump system according to the present invention, the aqueous medium heat-exchanged and heated in the first usage unit is used for heating in the target space, for example, by a floor heating panel or the like, but in general, the aqueous medium is used. The heating operation using the air medium has a feature that the inside of the target space can be heated faster than the heating operation. In this heat pump system, when the temperature difference between the target set temperature of the first usage unit and the temperature in the target space is larger than a predetermined value, priority is given to the operation of the second usage unit. The target set temperature can be quickly approached. On the contrary, when the temperature difference is smaller than the predetermined value, the operation of the first usage unit is prioritized, so the temperature in the target space gradually approaches the target set temperature or becomes the target set temperature. The temperature in the object space can be kept.

  A heat pump system according to a third aspect is the heat pump system according to the second aspect, wherein the first usage unit further includes a first usage-side flow rate adjustment valve. The first usage-side flow rate adjustment valve varies the flow rate of the refrigerant flowing through the first usage-side heat exchanger. Then, when the temperature difference is equal to or greater than a predetermined value, the control unit performs control to make the opening of the first usage-side flow rate control valve smaller than when the temperature difference is equal to or smaller than the predetermined value. Drive with priority.

  According to this heat pump system, when priority is given to the operation of the second usage unit, the opening of the first usage-side flow rate control valve is controlled to be small. That is, since the flow rate of the refrigerant flowing through the first usage-side heat exchanger is reduced by reducing the opening of the first usage-side flow rate adjustment valve, the operating load on the first usage unit is reduced, and the second usage unit Will be given priority.

  The heat pump system according to a fourth aspect is the heat pump system according to the second aspect, wherein the first usage unit further includes a circulation pump. The circulation pump circulates the aqueous medium in the aqueous medium circuit in which the aqueous medium that performs heat exchange in the first usage-side heat exchanger flows. And a control part operates a 2nd utilization unit preferentially by performing flow control of a circulating pump so that the flow of a circulating pump may decrease, when a temperature difference is more than predetermined value.

  According to this heat pump system, when the operation of the second usage unit is prioritized, the flow rate of the circulation pump is controlled so that the flow rate flowing to the first usage side heat exchanger of the first usage unit becomes small. That is, by reducing the flow rate of the aqueous medium that circulates on the aqueous medium circuit by the circulation pump, the flow rate of the aqueous medium that is the target of heat exchange flowing into the first usage-side heat exchanger is reduced. Therefore, the operation load of the first usage unit is reduced, and the operation of the second usage unit is prioritized.

  A heat pump system according to a fifth aspect of the present invention is the heat pump system according to any of the second to fourth aspects, wherein the second usage unit further includes a second usage-side flow rate adjustment valve. The second usage side flow rate adjustment valve varies the flow rate of the refrigerant flowing through the second usage side heat exchanger. Then, when the temperature difference is equal to or less than the predetermined value, the control unit performs control to make the opening of the second usage-side flow rate adjustment valve smaller than when the temperature difference is equal to or greater than the predetermined value. Drive with priority.

  According to this heat pump system, when priority is given to the operation of the first usage unit, the opening of the second usage-side flow rate control valve is controlled to be small. That is, since the flow rate of the refrigerant flowing through the second usage-side heat exchanger is reduced by reducing the opening of the second usage-side flow rate adjustment valve, the operating load on the second usage unit is reduced, and the first usage unit is reduced. Will be given priority.

  A heat pump system according to a sixth aspect of the present invention is the heat pump system according to any of the second to fourth aspects, wherein the second usage unit further includes a fan. The fan generates an air flow in which conditioned air is supplied to the target space. And when a temperature difference is below a predetermined value, a control part performs a control which reduces the air volume of the fan of a 2nd utilization unit, and makes a 1st utilization unit operate preferentially.

  According to this heat pump system, when priority is given to the operation of the first usage unit, the air volume of the fan of the second usage unit is controlled to decrease. That is, since the operation load of the second usage unit is reduced by reducing the air volume of the fan, the first usage unit is given priority.

  According to the heat pump system according to the first aspect, it is possible to suppress a fear that the sum of the operation capacities of the respective utilization units exceeds the rated heating capacity of the heat source unit, and the target space can be stably heated.

  According to the heat pump system according to the second aspect, when the temperature difference between the target set temperature of the first usage unit and the temperature in the target space is larger than a predetermined value, the operation of the second usage unit is given priority. It is possible to quickly bring the temperature in the space close to the target set temperature. On the contrary, when the temperature difference is smaller than the predetermined value, priority is given to the operation of the first usage unit, so that the temperature in the target space gradually approaches the target set temperature or becomes the target set temperature. The temperature in the target space can be kept.

  According to the heat pump system according to the third aspect of the present invention, since the flow rate of the refrigerant flowing through the first usage-side heat exchanger is reduced by reducing the opening of the first usage-side flow rate adjustment valve, the operating load of the first usage unit is reduced. The second usage unit is prioritized.

  According to the heat pump system of the fourth aspect of the present invention, the flow rate of the aqueous medium that is the target of heat exchange flowing into the first usage-side heat exchanger is reduced by reducing the flow rate of the aqueous medium that circulates on the aqueous medium circuit by the circulation pump. Less. Therefore, the operation load of the first usage unit is reduced, and the second usage unit is prioritized.

  According to the heat pump system according to the fifth aspect of the present invention, since the flow rate of the refrigerant flowing through the second usage-side heat exchanger is reduced by reducing the opening of the second usage-side flow rate adjustment valve, the operating load of the second usage unit is reduced. The first usage unit is prioritized.

  According to the heat pump system according to the sixth aspect of the present invention, since the operation load of the second usage unit is reduced by reducing the air volume of the fan, the first usage unit is given priority.

The conceptual diagram of the whole structure of the heat pump system which concerns on 1st Embodiment. 1 is a schematic configuration diagram of a heat pump system according to a first embodiment. The figure which shows typically the structure of the remote controller which concerns on 1st Embodiment. 1 is an external view of a remote controller according to a first embodiment. The flowchart showing the flow of the whole operation | movement of the heat pump system which concerns on 1st Embodiment. The conceptual diagram of the whole structure of the heat pump system which concerns on 2nd Embodiment. The structure schematic of the heat pump system which concerns on 2nd Embodiment. The figure which shows typically the structure of the remote controller which concerns on 2nd Embodiment. The flowchart showing the flow of the whole operation | movement of the heat pump system which concerns on 2nd Embodiment. The structure schematic of the heat pump system which concerns on other embodiment (c). The structure schematic of the heat pump system which concerns on other embodiment (d). FIG. 3 is a schematic configuration diagram when there are two second usage units in the heat pump system of FIG. 2. FIG. 11 is a schematic configuration diagram when the number of second usage units is two in the heat pump system of FIG. 10. FIG. 3 is a schematic configuration diagram when there are two first usage units in the heat-pon system of FIG. 2. In the heat-pon system of FIG. 10, the structure schematic in case the two 1st utilization units are two units | sets. FIG. 3 is a schematic configuration diagram in the case where there are two first and second usage units in the heat pump system of FIG. 2. FIG. 11 is a schematic configuration diagram in the case where there are two first and second usage units in the heat pump system of FIG. 10.

  Hereinafter, a heat pump system according to the present invention will be described in detail with reference to the drawings.

<First Embodiment>
(1) Overview of Heat Pump System FIG. 1 is a diagram conceptually showing the configuration of the heat pump system 1 according to the first embodiment of the present invention. As shown in FIG. 1, the heat pump system 1 according to the present embodiment includes a heat source unit 2, a first usage unit 4a, a hot water storage unit 8a, a hot water heating unit 9a, a second usage unit 10a, a temperature sensor 107a (in the temperature detection unit). Equivalent), and remote controllers 11a and 11c. One heat source unit 2 is installed outdoors, and each of the first usage unit 4a, the second usage unit 10a, the hot water storage unit 8a, and the hot water heating unit 9a is installed indoors one by one. The second usage unit 10a is an indoor unit, and is installed on the ceiling in one target space sq. Further, in the target space sq, for example, a hot water heating unit 9a which is a radiator or a floor heating panel is also installed. The temperature sensor 107a is provided in the second usage unit 10a, and the remote controllers 11a and 11c are installed on the wall surface of the target space sq so as to correspond to the usage units 4a and 10a.

  The heat source unit 2 is connected to each of the usage units 4a and 10a, and the first usage unit 4a is also connected to each of the hot water storage unit 8a and the hot water heating unit 9a. The remote controller 11a is connected to the second usage unit 10a and can remotely control the usage unit 10a. The remote controller 11c is connected to the hot water heating unit 9a, and can remotely control the first usage unit 4a via the hot water heating unit 9a.

  Such a heat pump system 1 can perform an operation for heating an aqueous medium using a vapor compression heat pump cycle, an operation for heating the air in the target space sq using the aqueous medium, and the like. . Specifically, the heat pump system 1 can be operated in the following modes (I) to (V).

  (I) A hot water supply mode in which the first usage unit 4a performs a hot water supply operation (specifically, the hot water storage unit 8a and / or the hot water heating unit 9a are also operated in addition to the first usage unit 4a).

  (II) A cooling mode in which only the second usage unit 10a performs the cooling operation to cool the inside of the target space sq.

  (III) The heating mode in which only the second usage unit 10a performs the heating operation, thereby heating the target space sq.

  (IV) Hot water supply cooling mode in which the first usage unit 4a performs a hot water supply operation and the second usage unit 10a performs a cooling operation.

  (V) A hot water supply and heating mode in which the first usage unit 4a performs a hot water supply operation and the second usage unit 10a performs a heating operation.

  In addition, in FIG. 1, the case where the hot water heating unit 9a is a floor heating panel is illustrated as an example.

(2) Configuration FIG. 2 is a diagram schematically showing the configuration of the heat pump system 1 according to the present embodiment. As shown in FIG. 2, the heat source side refrigerant circuit 20 is configured by connecting the heat source unit 2, the first usage unit 4 a, and the second usage unit 10 a via the refrigerant communication tubes 12, 13, and 14. Yes. The aqueous medium circuit 80a is configured by connecting the first usage unit 4a, the hot water storage unit 8a, and the hot water heating unit 9a via the aqueous medium communication pipes 15a and 16a. In the heat source side refrigerant circuit 20, HFC-410A, which is a kind of HFC type refrigerant, is sealed as a heat source side refrigerant, and ester or ether type refrigerating machine oil having compatibility with the HFC type refrigerant is on the heat source side. It is enclosed for lubrication of the compressor 21 (described later). Further, water as an aqueous medium circulates in the aqueous medium circuit 80a.

(2-1) Heat source unit The heat source unit 2 is connected to each of the utilization units 4a and 10a via the refrigerant communication tubes 12, 13, and 14, and constitutes a part of the heat source side refrigerant circuit 20.

  The heat source unit 2 mainly includes a heat source side compressor 21, an oil separation mechanism 22, a heat source side switching mechanism 23, a heat source side heat exchanger 24, a heat source side expansion mechanism 25, a suction return pipe 26, a subcooler 27, and a heat source side. An accumulator 28 is provided.

  The heat source side compressor 21 is a mechanism for compressing the heat source side refrigerant. In the present embodiment, as the heat source side compressor 21, a volume type compression element (not shown) such as a rotary type or a scroll type accommodated in a casing (not shown) is also accommodated in the casing. A hermetic compressor driven by the heat source side compressor motor 21a is employed. A high-pressure space (not shown) filled with the heat-source-side refrigerant after being compressed by the compression element is formed in the casing of the heat-source-side compressor 21, and refrigerating machine oil is stored in the high-pressure space. ing. The heat source side compressor motor 21a can change the rotation speed (that is, the operating frequency) by an inverter device (not shown), thereby enabling capacity control of the heat source side compressor 21.

  The oil separation mechanism 22 is a mechanism for separating the refrigerating machine oil contained in the heat source side refrigerant discharged from the heat source side compressor 21 and returning it to the suction of the heat source side compressor. The oil separation mechanism 22 mainly includes an oil separator 22a provided in the heat source side discharge pipe 21b of the heat source side compressor 21, and an oil that connects the oil separator 22a and the heat source side suction pipe 21c of the heat source side compressor 21. And a return pipe 22b. The oil separator 22a is a device that separates refrigeration oil contained in the heat source side refrigerant discharged from the heat source side compressor 21. The oil return pipe 22 b has a capillary tube, and is a refrigerant pipe that returns the refrigeration oil separated from the heat source side refrigerant in the oil separator 22 a to the heat source side suction pipe 21 c of the heat source side compressor 21.

  The heat source side switching mechanism 23 is a heat source side heat radiation operation state in which the heat source side heat exchanger 24 functions as a heat source side refrigerant radiator and a heat source side evaporation operation state in which the heat source side heat exchanger 24 functions as an evaporator of the heat source side refrigerant. And a four-way switching valve. The heat source side switching mechanism 23 is connected to the heat source side discharge pipe 21b, the heat source side suction pipe 21c, the first heat source side gas refrigerant pipe 23a connected to the gas side of the heat source side heat exchanger 24, and the gas side closing valve 30. The second heat source side gas refrigerant pipe 23b is connected. The heat source side switching mechanism 23 communicates the heat source side discharge pipe 21b and the first heat source side gas refrigerant pipe 23a, and communicates the second heat source side gas refrigerant pipe 23b and the heat source side suction pipe 21c (heat source side heat dissipation). It is possible to perform switching in the operating state (solid line of the heat source side switching mechanism 23 in FIG. 1). Further, the heat source side switching mechanism 23 communicates the heat source side discharge pipe 21b and the second heat source side gas refrigerant pipe 23b, and communicates the first heat source side gas refrigerant pipe 23a and the heat source side suction pipe 21c (heat source side evaporation). It is possible to perform switching in the operating state (broken line of the heat source side switching mechanism 23 in FIG. 1). In the present embodiment, the case where the heat source side switching mechanism 23 is configured by a four-way switching valve is taken as an example, but the heat source side switching mechanism 23 only needs to switch the flow direction of the heat source side refrigerant. It is not limited to a four-way switching valve. The heat source side switching mechanism 23 may be composed of, for example, a plurality of electromagnetic valves.

  The heat-source-side heat exchanger 24 is a heat exchanger that functions as a heat-source-side refrigerant radiator or evaporator by performing heat exchange between the heat-source-side refrigerant and outdoor air. The liquid side of the heat source side heat exchanger 24 is connected to the heat source side liquid refrigerant pipe 24a, and the gas side of the heat exchanger 24 is connected to the first heat source side gas refrigerant pipe 23a. The outdoor air used for heat exchange of the heat source side heat exchanger 24 is supplied by a heat source side fan 32 that is rotationally driven by a heat source side fan motor 32a.

  The heat source side expansion mechanism 25 is an electric expansion valve that depressurizes the heat source side refrigerant flowing through the heat source side heat exchanger 24, and is provided in the heat source side liquid refrigerant tube 24a.

  The suction return pipe 26 is a refrigerant pipe that branches a part of the heat source side refrigerant flowing through the heat source side liquid refrigerant pipe 24a and returns it to the suction of the heat source side compressor 21, and has one end connected to the heat source side liquid refrigerant pipe 24a. The other end is connected to the heat source side suction pipe 21c. Further, the suction return pipe 26 is provided with a suction return expansion valve 26a that can be controlled by an opening, for example, constituted by an electric expansion valve.

  The subcooler 27 exchanges heat between the heat source side refrigerant flowing through the heat source side liquid refrigerant pipe 24a and the heat source side refrigerant flowing through the suction return pipe 26 (specifically, the refrigerant after being decompressed by the suction return expansion valve 26a). It is a heat exchanger that performs.

  The heat source side accumulator 28 is provided in the heat source side suction pipe 21c, and temporarily accumulates the heat source side refrigerant circulating in the heat source side refrigerant circuit 20 before being sucked into the heat source side compressor 21 from the heat source side suction pipe 21c. It is a container for.

  Further, a liquid side shut-off valve 29 is provided at a connection portion between the heat source side liquid refrigerant tube 24a and the refrigerant communication tube 13, and a gas side closure is provided at a connection portion between the second heat source side gas refrigerant tube 23b and the refrigerant communication tube 14. A valve 30 is provided. A discharge side shut-off valve 31 is provided at a connection portion between the heat source side discharge branch pipe 21d branched from the heat source side discharge pipe 21b and the refrigerant communication pipe 12.

  The heat source unit 2 is provided with various sensors. The types of sensors include a heat source side suction pressure sensor 33 that detects the pressure of the heat source side refrigerant on the suction side of the heat source side compressor 21, and a heat source side discharge that detects the pressure of the heat source side refrigerant on the discharge side of the heat source side compressor 21. Examples include a pressure sensor 34, a heat source side heat exchange temperature sensor 35 for detecting the temperature of the heat source side refrigerant on the liquid side of the heat source side heat exchanger 24, and an outside air temperature sensor 36 for detecting the outside air temperature.

(2-2) 1st utilization unit The 1st utilization unit 4a is connected to the heat source unit 2 and the 2nd utilization unit 10a via the refrigerant | coolant communication pipes 12 and 13, and comprises a part of heat source side refrigerant circuit 20. is doing. Moreover, the 1st utilization unit 4a is connected to the hot water storage unit 8a and the hot water heating unit 9a via the aqueous medium communication pipes 15a and 16a, and comprises a part of aqueous medium circuit 80a.

  Such a first usage unit 4a mainly includes a first usage-side heat exchanger 41a, a first usage-side flow rate adjustment valve 42a, and a circulation pump 43a.

  The first usage-side heat exchanger 41a is a heat exchanger that functions as a heat radiator for the heat source side refrigerant by exchanging heat between the heat source side refrigerant and the aqueous medium. In the first use side heat exchanger 41a, a first use side liquid refrigerant pipe 45a is connected to the liquid side of the flow path through which the heat source side refrigerant flows, and the first use side is connected to the gas side of the flow path. A discharge refrigerant pipe 46a is connected. In the first usage-side heat exchanger 41a, the first usage-side water inlet pipe 47a is connected to the inlet side of the flow path through which the aqueous medium flows, and the outlet side of the flow path through which the aqueous medium flows. The 1st utilization side water outlet pipe 48a is connected. The refrigerant communication tube 13 is connected to the first usage-side liquid refrigerant tube 45a, and the refrigerant communication tube 12 is connected to the first usage-side discharge refrigerant tube 46a. An aqueous medium communication pipe 15a is connected to the first usage-side water inlet pipe 47a, and an aqueous medium communication pipe 16a is connected to the first usage-side water outlet pipe 48a.

  The first usage-side flow rate adjustment valve 42a is an electric expansion valve capable of changing the flow rate of the heat source-side refrigerant flowing through the first usage-side heat exchanger 41a by performing opening degree control. It is provided in the refrigerant pipe 45a.

  The first use side discharge refrigerant pipe 46a allows the flow of the heat source side refrigerant from the refrigerant communication pipe 12 toward the first use side heat exchanger 41a, and goes from the first use side heat exchanger 41a to the refrigerant communication pipe 12. A first usage-side discharge check valve 49a that prohibits the flow of the heat source-side refrigerant is provided.

  The circulation pump 43a is a mechanism for increasing the pressure of the aqueous medium, and is provided in the first usage-side water outlet pipe 48a. The circulation pump 43a can circulate the aqueous medium in the aqueous medium circuit 80a in which the aqueous medium that performs heat exchange in the first usage-side heat exchanger 41a flows. In this embodiment, a pump in which a centrifugal or positive displacement pump element (not shown) is driven by a circulation pump motor 44a is employed as the circulation pump 43a. Circulation pump motor 44a can change the rotation speed (namely, operation frequency) with an inverter device (not shown), and capacity control of circulation pump 43a is attained by this.

  The first usage unit 4a having such a configuration causes the first usage-side heat exchanger 41a to function as the heat-source-side refrigerant radiator that is introduced from the refrigerant communication tube 12 by using the first usage-side heat exchanger 41a. It is possible to perform a hot water supply operation in which the heat-source-side refrigerant that has radiated heat is led to the refrigerant communication tube 13 and the aqueous medium is heated by the heat-radiation of the heat-source-side refrigerant in the first usage-side heat exchanger 41a. Thus, when the 1st utilization unit 4a performs hot water supply operation, it corresponds to the "hot water supply mode" "hot water supply heating mode" of the heat pump system 1.

  Various sensors are provided in the first usage unit 4a. The types of sensors include a first usage-side heat exchange temperature sensor 50a that detects the temperature of the heat-source-side refrigerant on the liquid side of the first usage-side heat exchanger 41a, and an aqueous medium at the inlet of the first usage-side heat exchanger 41a. Examples include an aqueous medium outlet temperature sensor 51a that detects the temperature and an aqueous medium outlet temperature sensor 52a that detects the temperature of the aqueous medium at the outlet of the first usage-side heat exchanger 41a.

  In addition, although not shown in figure, the 1st utilization unit 4a has a control part for controlling each apparatus of the 1st utilization unit 4a.

(2-3) Hot Water Storage Unit The hot water storage unit 8a is connected to the first usage unit 4a via the aqueous medium communication pipes 15a and 16a, and constitutes a part of the aqueous medium circuit 80a. The hot water storage unit 8a mainly has a hot water storage tank 81a and a heat exchange coil 82a.

  The hot water storage tank 81a is a container for storing water as an aqueous medium used for hot water supply. A hot water supply pipe 83a is connected to the upper part of the hot water storage tank 81a to send a heated aqueous medium to a faucet or a shower, and the lower part is used to replenish the aqueous medium consumed by the hot water supply pipe 83a. A water supply pipe 84a is connected.

  The heat exchange coil 82a is provided in the hot water storage tank 81a, and heats the aqueous medium in the hot water storage tank 81a by exchanging heat between the aqueous medium circulating in the aqueous medium circuit 80a and the aqueous medium in the hot water storage tank 81a. (Ie, function as a heat exchanger). The aqueous medium communication pipe 16a is connected to the inlet of the heat exchange coil 82a, and the aqueous medium communication pipe 15a is connected to the outlet.

  The hot water storage unit 8a having such a configuration heats the aqueous medium in the hot water storage tank 81a by the aqueous medium (that is, hot water) in the aqueous medium circuit 80a heated by the first usage unit 4a, It is possible to store water. In the present embodiment, the case where the hot water storage unit 8a is a type of unit that accumulates an aqueous medium heated by heat exchange with the aqueous medium heated by the first usage unit 4a in a hot water storage tank will be described. Yes. However, as the hot water storage unit, a type of unit that stores the aqueous medium itself heated in the first usage unit 4a in the hot water storage tank may be adopted.

  The hot water storage unit 8a is provided with various sensors. Examples of the type of sensor include a hot water storage temperature sensor 85a for detecting the temperature of the aqueous medium stored in the hot water storage tank 81a.

  In addition, although not shown in figure, the hot water storage unit 8a has a control part for controlling each apparatus of the hot water storage unit 8a.

(2-4) Hot Water Heating Unit The hot water heating unit 9a is connected to the first usage unit 4a via the aqueous medium communication pipes 15a and 16a, and constitutes a part of the aqueous medium circuit 80a. The hot water heating unit 9a mainly has a heat exchange panel 91a.

  The heat exchange panel 91a is a floor heating panel, and is provided below the floor in the target space sq. The heat exchange panel 91a is a heat exchanger that functions as a radiator for the aqueous medium circulating in the aqueous medium circuit 80a. The aqueous medium communication pipe 16a is connected to the inlet of the heat exchange panel 91a, and the outlet is connected to the outlet. The aqueous medium communication pipe 15a is connected.

  An aqueous medium side switching mechanism 161a composed of a three-way valve is provided on the aqueous medium communication pipe 16a connecting the hot water heating unit 9a and the first usage unit 4a. The aqueous medium side switching mechanism 161a is configured so that the aqueous medium circulating in the aqueous medium circuit 80a is supplied to both the hot water storage unit 8a and the hot water heating unit 9a, or either the hot water storage unit 8a and the hot water heating unit 9a. The flow path of the aqueous medium can be switched. In particular, when an aqueous medium (specifically hot water) circulating in the aqueous medium circuit 80a is supplied to the hot water heating unit 9a, the floor in the target space sq is heated. That is, the aqueous medium heated by the first usage-side heat exchanger 41a of the first usage unit 4a can be used for heating the target space sq. Here, the case where the hot water is supplied to the hot water heating unit 9a as described above corresponds to the case where the heat pump system 1 is in the “hot water supply mode” or the “hot water supply heating mode”.

  In addition, although not shown in figure, the warm water heating unit 9a has a control part for controlling each apparatus of the warm water heating unit 9a.

(2-5) Second Usage Unit The second usage unit 10a is connected to the heat source unit 2 via the refrigerant communication tubes 13 and 14, and constitutes a part of the heat source side refrigerant circuit 20.

  The second usage unit 10a mainly includes a second usage-side heat exchanger 101a, a second usage-side flow rate adjustment valve 102a, and a usage-side fan 105a (corresponding to the fan according to the present invention).

  The second usage-side heat exchanger 101a is a heat exchanger that functions as a heat-source-side refrigerant radiator or evaporator by exchanging heat between the heat-source-side refrigerant and room air as an air medium. A second usage-side liquid refrigerant tube 103a is connected to the liquid side of the second usage-side heat exchanger 101a, and a second usage-side gas refrigerant tube 104a is connected to the gas side. A refrigerant communication tube 13 and a refrigerant communication tube 14 are connected to the second usage-side liquid refrigerant tube 103a and the second usage-side gas refrigerant tube 104a, respectively. The air medium used for heat exchange of the second usage side heat exchanger 101a is supplied from the target space sq by the usage side fan 105a.

  The second usage-side flow rate adjustment valve 102a is an electric expansion valve capable of varying the flow rate of the heat source-side refrigerant flowing through the second usage-side heat exchanger 101a by performing opening degree control. It is provided in the refrigerant pipe 103a.

  The usage-side fan 105a has air after the air in the target space sq flows into the casing (not shown) of the second usage unit 10a as an air medium and is heat-exchanged by the second usage-side heat exchanger 101a. An air medium (that is, conditioned air) generates an air flow that is supplied into the target space sq. The usage-side fan 105a is connected to the usage-side fan motor 106a and is rotationally driven by the usage-side fan motor 106a.

  In the second usage unit 10a having such a configuration, when the heat source side switching mechanism 23 is in the heat source side heat radiation operation state, the evaporation of the heat source side refrigerant introduced from the refrigerant communication tube 13 by the second usage side heat exchanger 101a. When the heat source side refrigerant evaporated in the second usage side heat exchanger 101a is led to the refrigerant communication tube 14, the air medium is cooled by evaporation of the heat source side refrigerant in the second usage side heat exchanger 101a. The cooling operation can be performed (corresponding to the “cooling mode” and “hot water supply cooling mode” of the heat pump system 1). In the second usage unit 10a, when the heat source side switching mechanism 23 is in the heat source side evaporation operation state, the second usage side heat exchanger 101a functions as a heat radiator for the heat source side refrigerant introduced from the refrigerant communication tube 14. When the heat-source-side refrigerant radiated in the second usage-side heat exchanger 101a is led out to the refrigerant communication tube 13, a heating operation is performed in which the air medium is heated by the heat-radiation of the heat-source-side refrigerant in the second usage-side heat exchanger 101a. (Corresponding to “heating mode” and “hot water supply heating mode” of the heat pump system 1).

  Although not shown, the second usage unit 10a includes a control unit for controlling each device of the second usage unit 10a.

(2-6) Temperature sensor The temperature sensor 107a is provided in the second usage unit 10a described above. More specifically, the temperature sensor 107a is provided in the vicinity of a suction port (not shown) formed in a casing (not shown) of the second usage unit 10a. The temperature sensor 107a detects the air sucked into the casing of the second usage unit 10a from the suction port, that is, the temperature Tr in the target space sq. For example, if the heat pump system 1 is in the “hot water supply / heating mode”, the temperature sensor 107a is heat-exchanged in the aqueous medium exchanged in the first usage-side heat exchanger 41a and in the second usage-side heat exchanger 101a. The temperature Tr in the target section sq in which heating is performed using the air medium can be detected.

  In the present embodiment, the temperature Tr detected by the temperature sensor 107a is used for operation control of the first usage unit 4a and the second usage unit 10a, and details thereof will be described later.

(2-7) Remote controller The remote controllers 11a and 11c mainly have a display unit and an operation unit. The user can set the target set temperature of each connected unit or give instructions regarding various operations via the remote controllers 11a and 11c.

  In particular, in the present embodiment, of the remote controllers 11a and 11c, the remote controller 11a connected to the second usage unit 10a is not only the operation control of the second usage unit 10a, but also the operation control of the first usage unit 4a. Also do. Therefore, the configuration of the remote controller 11a will be described below.

  As shown in FIGS. 3 and 4, the remote controller 11a has a first communication unit 111a, a second communication unit 112a, an operation unit 113a, a display unit 114a, and a control unit 115a.

[First communication unit]
The 1st communication part 111a is for communicating with the 1st utilization unit 4a, Comprising: The 1st operation control information is output with respect to the 1st utilization unit 4a, or the present driving condition of the 1st utilization unit 4a The 1st driving | running state information which shows is acquired from the 1st utilization unit 4a. As the first operation control information, instructions for turning on and off the operation of the first usage unit 4a (specifically, thermo-off and thermo-on), and a flow rate for increasing or decreasing the flow rate of the circulation pump 43a in the first usage unit 4a A control instruction, an opening degree control instruction of the first usage side flow rate adjustment valve 42a, and the like can be given. Examples of the first operation status information include information on whether or not the first usage unit 4a is currently performing a hot water supply operation, and the target set temperature To of the first usage unit 4a.

  The first operation control information output by the first communication unit 111a is determined by the control unit 115a functioning as a first usage unit control unit 119a (described later). The first operation control information output by the first communication unit 111a is received by a control unit (not shown) in the first usage unit 4a, and each device of the first usage unit 4a is controlled based on the first operation control information. Will be. In addition, the current operation status of the first usage unit 4a is grasped by a control unit (not shown) in the first usage unit 4a, and the first communication unit 111a is controlled by the control unit (not shown) of the first usage unit 4a. 1) is acquired as the first driving situation information.

[Second communication section]
The second communication unit 112a is for communicating with the second usage unit 10a. The 2nd communication part 112a outputs 2nd driving | running control information with respect to the 2nd utilization unit 10a, or acquires the 2nd driving | running condition information which shows the present driving | running condition of the 2nd utilization unit 10a. Moreover, the 2nd communication part 112a acquires the detection result (namely, temperature Tr in the object space sq) of the temperature sensor 107a provided in the 2nd utilization unit 10a via the 2nd utilization unit 10a. As the second operation control information, instructions for turning on and off the operation of the second usage unit 10a (that is, thermo-off and thermo-on), and control of the strength of the amount of air blown from the second usage unit 10a into the target space sq. Examples include an instruction (that is, an instruction for controlling the air volume of the use side fan 105a), an instruction for controlling the opening degree of the second use side flow rate adjusting valve 102a, and an instruction for outputting the detection result by the temperature sensor 107a. Examples of the second driving status information include information on what type of driving the second usage unit 10a is currently performing, information on whether the second usage unit 10a is in a thermo-on or thermo-off state, and the like.

  The second operation control information output by the second communication unit 112a is determined by the control unit 115a functioning as a second usage unit control unit 120a (described later). The second operation control information output by the second communication unit 112a is received by a control unit (not shown) in the second usage unit 10a, and each device of the second usage unit 10a is controlled based on the second operation control information. Will be. In addition, the current operation status of the second usage unit 10a is grasped by a control unit (not shown) in the second usage unit 10a, and the second communication unit 112a is controlled by the control unit (not shown) of the second usage unit 10a. 2) is acquired as the second driving situation information.

[Operation section]
The operation unit 113a is used when various settings are made by the user who uses the heat pump system 1, and includes various buttons as shown in FIG. The operation unit 113a accepts various settings when the user presses a button. Various settings made by the user include a change in the target set temperature of the second usage unit 10a, an instruction on the type of operation performed by the second usage unit 10a, an operation stop instruction, an operation start instruction, and the like.

  In addition, the remote controller 11a according to the present embodiment may be provided so that not only the target set temperature of the second usage unit 10a but also the target set temperature To of the first usage unit 4a can be set. In this case, the user can set the target set temperature To of the first usage unit 4a not only using the remote controller 11c but also using the operation unit 113a of the remote controller 11a.

[Display section]
The display unit 114a is configured by a liquid crystal display, and displays information regarding various settings when the user performs various settings via the operation unit 113a, the target set temperature currently set in the second usage unit 10a. Can be displayed.

  In addition, when the remote controller 11a is configured to be able to set the target set temperature of the first usage unit 4a, the display unit 114a can also display a setting screen for the target set temperature To.

(Control part)
The control unit 115a is a microcomputer including a CPU and a RAM, and is connected to the communication units 111a and 112a, the operation unit 113a, and the display unit 114a as shown in FIG. The control unit 115a controls each of these connected devices. In particular, the control unit 115a according to the present embodiment includes, in addition to the operation control of the second usage unit 10a, the target set temperature To of the first usage unit 4a and the temperature Tr in the target space sq detected by the temperature sensor 107a. Based on the temperature difference Tx, the operation load of each utilization unit 4a, 10a is controlled.

  In order to perform such an operation, the control unit 115a, as shown in FIG. 3, includes a communication control unit 116a, a mode grasping unit 117a, a temperature difference calculation unit 118a, a first usage unit control unit 119a, and a second usage unit control. It functions as the unit 120a.

−Communication control unit−
The communication control unit 116a performs communication control of the first and second communication units 111a and 112a.

  For example, the communication control unit 116a periodically updates the first operation status information of the first usage unit 4a and the second operation status information of the second usage units 10a and 10b (for example, every 5 minutes) and The second communication unit 112a is made to acquire.

  Further, when at least one of the first use unit control unit 119a and the second use unit control unit 120a generates the first operation control information and the second operation control information, the communication control unit 116a generates the first communication unit 111a and the second use control unit 116a. The communication unit 112a outputs the generated information to the first usage unit 4a and the second usage unit 10a.

  Further, if the second usage unit 10a is in an operation such as a heating operation, the communication control unit 116a periodically outputs a detection result output from the temperature sensor 107a (for example, every 5 minutes). The second communication unit 112a acquires the latest temperature Tr in the target space sq detected by the sensor 107a.

-Mode grasping part-
The mode grasping unit 117a grasps the current mode of the heat pump system 1 based on the first operation state information, the second operation state information, and the like. For example, the first operation status information is information that “the first usage unit 4a is performing a hot water supply operation”, and the second operation status information is information that “the second usage unit 10a is turned off”. If so, the mode grasping unit 117a grasps that the current mode of the heat pump system 1 is the “hot water supply mode”. Further, the first operation status information is information that “the first usage unit 4a is performing hot water supply operation”, and the second operation status information is information that “the second usage unit 10a is performing heating operation”. If so, the mode grasping unit 117a grasps that the current mode of the heat pump system 1 is the “hot water supply / heating mode”.

-Temperature difference calculator-
When the first usage unit 4a and the second usage unit 10a are operating together, the temperature difference calculation unit 118a is configured to calculate the target set temperature To of the first usage unit 4a and the temperature Tr detected by the temperature sensor 107a. A temperature difference Tx is calculated. For example, when the mode grasping unit 117a recognizes that the mode of the heat pump system 1 is the “hot water supply / heating mode”, the temperature difference calculating unit 118a detects that the second communication unit 112a detects the temperature Tr in the target space sq from the temperature sensor 107a. Is obtained, the temperature difference Tx is obtained by subtracting the temperature Tr from the target set temperature To in the first usage unit 4a (Tx = To−Tr).

  The target set temperature To used for calculating the temperature difference Tx is the target set temperature To included in the first operating status information acquired by the first communication unit 111a from the first usage unit 4a. Alternatively, the target set temperature To of the first usage unit 4a set by the user via the operation unit 113a of the controller 11a may be used. In any case, the latest target set temperature To is the temperature difference Tx. It will be used for the calculation of.

  Moreover, in this embodiment, it demonstrated that the temperature difference Tx was calculated | required by subtracting the temperature Tr in the object space sq from the target setting temperature To of the 1st utilization unit 4a. However, the temperature difference Tx may be obtained by subtracting the target set temperature To of the first usage unit 4a from the temperature Tr of the target space sq.

-First usage unit controller-
The first usage unit control unit 119a generates first operation control information of the first usage unit 4a based on the grasping result by the mode grasping unit 117a and the temperature difference Tx obtained by the temperature difference calculating unit 118a. Specifically, the first usage unit controller 119a compares the temperature difference Tx with a predetermined value Ta (here, the predetermined value Ta is a positive value). When the temperature difference Tx is equal to or less than the predetermined value Ta (Tx ≦ Ta), the first usage unit control unit 119a generates first operation control information for preferentially operating the first usage unit 4a. Conversely, when the temperature difference Tx is greater than or equal to the predetermined value Ta (Tx ≧ Ta), the first usage unit control unit 119a is configured to reduce the operating load of the first usage unit 4a. First operation control information for controlling the first usage unit 4a is generated so that the operation is stopped or the operation load is lowered.

  More specifically, the first usage unit controller 119a according to the present embodiment reduces the opening of the first usage-side flow rate adjustment valve 42a when the temperature difference Tx is equal to or greater than a predetermined value Ta (Tx ≧ Ta). By performing the control to be performed, the operation load of the first usage unit 4a is reduced. In this case, the opening degree of the first usage-side flow rate adjustment valve 42a is the first when the temperature difference Tx is equal to or less than the predetermined value Ta (Tx ≦ Ta), that is, when the first usage unit 4a is preferentially operated. The opening adjustment is performed by the first usage unit control unit 119a so as to be smaller than the opening of the usage-side flow rate adjustment valve 42a. Thus, since the flow rate of the refrigerant | coolant which flows through the 1st utilization side heat exchanger 41a decreases in the 1st utilization unit 4a by the opening degree of the 1st utilization side flow control valve 42a becoming small, the 1st utilization unit The operation load of 4a becomes small. Therefore, the operation of the second usage unit 10a is prioritized over the first usage unit 4a.

  When the temperature difference Tx is equal to or smaller than the predetermined value Ta (Tx ≦ Ta), the first usage unit controller 119a performs the hot water supply operation so that the hot water supply operation is performed based on the target set temperature To of the first usage unit 4a. 1 Operation control information is generated. That is, when the temperature difference Tx is equal to or smaller than the predetermined value Ta, the first usage unit 4a is normally operated instead of the first operation control information considering the operation load of the first usage unit 4a as described above. First operation control information is generated. However, in this case, since the operation load is suppressed on the second usage unit 10a side as will be described later, as a result, the first operation control information that causes the first usage unit 4a to operate preferentially is generated. become.

  Here, the reason why the operation of the second usage unit 10a is prioritized when the temperature difference Tx is larger than the predetermined value Ta (Tx ≧ Ta) will be described. For example, when the mode of the heat pump system 1 is “hot water supply / heating mode” and each of the usage units 4a, 10a is performing hot water supply operation and heating operation, respectively, the temperature difference Tx becomes larger than a predetermined value Ta. (Tx ≧ Ta), a state where the temperature Tr in the target space sq has not yet reached the target set temperature To of the first usage unit 4a. In this case, it is preferable to increase the temperature Tr in the target space sq by increasing the driving capacity of both the usage units 4a and 10a. However, if the driving capacity increases, the operating capacity of both the usage units 4a and 10a also increases. Therefore, there is a possibility that the heat source unit 2 falls into a capacity shortage. Therefore, when the temperature difference Tx is larger than the predetermined value Ta (Tx ≧ Ta), the first usage unit control unit 119a according to the present embodiment uses the water medium heated by the first usage unit 4a as hot water heating. The heating operation of the second usage unit 10a that heats the air medium and supplies the air medium to the target space sq is given priority over the heating in the target space sq in the unit 9a. This is because the rise of the temperature Tr in the target space sq is quicker in the latter operation (that is, the heating operation that uses the air medium) than in the former operation (that is, the heating operation that uses the aqueous medium).

  On the other hand, if the temperature difference Tx is lower than the predetermined value Ta (Tx ≦ Ta), the temperature Tr in the target space sq is approximately the target set temperature Tr or is in a state close to the target set temperature To. become. Therefore, the operation of the first usage unit 4a is prioritized so that the inside of the target space sq is warmed by the operation using the aqueous medium having a heating capacity lower than that of the second usage unit 10a. Thereby, the temperature Tr in the target space sq gradually approaches the target set temperature To of the first usage unit 4a, or the temperature Tr in the target space sq becomes the target set temperature To of the first usage unit 4a. It will be kept.

  Here, the predetermined value Ta is appropriately determined according to, for example, the height from the floor to the ceiling in the target space sq, the size of the target space sq, and the like. For example, the predetermined value Ta can be determined as “1 ° C.”.

  The first operation control information generated as described above is sent to the first usage unit 4a by the first communication unit 111a. The control unit (not shown) of the first usage unit 4a controls each device. Will be used.

-Second usage unit controller-
The second usage unit controller 120a generates the second operation control information of the second usage unit 10a based on the grasping result by the mode grasping portion 117a and the temperature difference Tx obtained by the temperature difference calculating portion 118a. Specifically, the second usage unit controller 120a compares the temperature difference Tx with a predetermined value Ta (here, the predetermined value Ta is a positive value). When the temperature difference Tx is equal to or greater than the predetermined value Ta (Tx ≧ Ta), the second usage unit control unit 120a generates second operation control information for preferentially operating the second usage unit 10a. Conversely, when the temperature difference Tx is equal to or less than the predetermined value Ta (Tx ≦ Ta), the second usage unit controller 120a is configured to reduce the operation load of the second usage unit 10a. Second operation control information for controlling the second usage unit 10a so as to stop the operation or reduce the operation load is generated.

  More specifically, when the temperature difference Tx is equal to or smaller than the predetermined value Ta (Tx ≦ Ta), the second usage unit control unit 120a according to the present embodiment opens the opening of the second usage-side flow rate adjustment valve 102a. By performing control to reduce the operating load, the operating load of the second usage unit 10a is reduced. In this case, the opening degree of the second usage-side flow rate adjustment valve 102a is the second when the temperature difference Tx is equal to or larger than the predetermined value Ta (Tx ≧ Ta), that is, when the second usage unit 10a is preferentially operated. The opening adjustment is performed by the second usage unit controller 120a so as to be smaller than the opening of the usage-side flow rate adjustment valve 102a. Thus, since the opening amount of the second usage-side flow rate adjustment valve 102a is reduced, in the second usage unit 10a, the flow rate of the refrigerant flowing through the second usage-side heat exchanger 101a is reduced. The operating load of 10a is reduced. Accordingly, the operation of the first usage unit 4a is prioritized over the second usage unit 10a.

  In addition, when the temperature difference Tx is equal to or greater than the predetermined value Ta (Tx ≧ Ta), the second usage unit controller 120a performs the second heating operation so that the heating operation is performed based on the target set temperature of the second usage unit 10a. Operation control information is generated. That is, when the temperature difference Tx is equal to or greater than the predetermined value Ta, the second usage unit 10a is normally operated instead of the second operation control information considering the operation load of the second usage unit 10a as described above. Second operation control information is generated. However, in this case, as described above, the operation load on the first usage unit 4a side is suppressed, and as a result, the second usage unit 10a is preferentially operated. 2 Operation control information will be produced | generated.

  The second operation control information generated by the above-described operation is sent to the second usage unit 10a by the second communication unit 112a, and the second usage-side flow rate adjustment valve by the control unit (not shown) of the second usage unit 10a. It will be used for the opening degree control of 102a.

(3) Operation Next, the operation of the heat pump system 1 according to the present embodiment will be described with reference to FIG. Hereinafter, for convenience of explanation, each functional unit of the control unit 115a of the remote controller 11a is collectively referred to as “control unit 115a”.

  Steps S1 and S2: The control unit 115a of the remote controller 11a obtains the first operating status information of the first usage unit 4a and the second operating status information of the second usage unit 10a, and the current status of each usage unit 4a, 10a. By grasping the situation, the current mode of the heat pump system 1 is confirmed. When the mode of the heat pump system 1 is the “hot water supply / heating mode” (Yes in S1), the temperature sensor 107a provided in the second usage unit 10a detects the temperature Tr in the target space sq, and the remote controller 11a The 2 communication part 112a acquires this (S2).

  Step S3: The control unit 115a calculates the temperature difference Tx by subtracting the temperature Tr of step S2 from the target set temperature To of the first usage unit 4a (S3).

  Steps S4 to S5: When the temperature difference Tx obtained in Step S3 is larger than the predetermined value Ta (Yes in S4), the control unit 115a opens the first usage-side flow rate adjustment valve 42a of the first usage unit 4a. By reducing the degree, priority is given to the operation of the second usage unit 10a (S5). Thereby, the flow rate of the refrigerant flowing through the first usage-side heat exchanger 41a is reduced, and the operation load of the first usage unit 4a is suppressed. However, the temperature Tr in the target space sq is mainly determined by the second usage unit 10a. By operation, the temperature is brought close to the target set temperature To of the first usage unit 4a.

  Step S6: When the temperature difference Tx obtained in step S3 is smaller than the predetermined value Ta (No in S4), the control unit 115a determines the opening degree of the second usage side flow rate adjustment valve 102a of the second usage unit 10a. By making it smaller, the operation of the first usage unit 4a is prioritized (S6). Thereby, the flow rate of the refrigerant flowing through the second usage-side heat exchanger 101a is reduced, and the operation load of the second usage unit 10a is suppressed. However, the temperature Tr in the target space sq is mainly determined by the first usage unit 4a. By operation, the target set temperature To of the first usage unit 4a is brought close to (or maintained).

  Step S7: As long as the mode of the heat pump system 1 is the “hot water supply / heating mode” (Yes in S7), the heat pump system 1 repeats the operations after Step S2. In Steps S1 and S7, when the mode of the heat pump system 1 is not “hot water supply / heating mode” (No in S1, No in S7), the heat pump system 1 ends the series of operations described above. Here, as a case where the mode of the heat pump system 1 is not the “hot water supply / heating mode”, the heat pump system 1 is in a completely off state, or “first hot water supply mode”, “heating mode”, “cooling mode”, etc. And the case where only one of the second usage units 4a and 10a is operating.

(4) Effect (A)
According to the heat pump system 1 according to the present embodiment, when both the first use unit 4a and the second use unit 10a are operating (here, the first use unit 4a performs the hot water supply operation and the second use Based on the temperature difference Tx between the target set temperature To of the first usage unit 4a and the temperature Tr detected by the temperature sensor 107a, taking the case where the unit 10a is in the hot water supply / heating mode in which the heating operation is performed) The operation loads of the first usage unit 4a and the second usage unit 10a are controlled. Therefore, the possibility that the sum of the operating capacity of the first usage unit 4a and the operating capacity of the second usage unit 10a exceeds the heating rated capacity of the heat source unit 2 can be suppressed, and the target space sq is stably heated. be able to.

(B)
Specifically, when the temperature difference Tx is larger than the predetermined value Ta (Tx ≧ Ta), the operation of the second usage unit 10a is prioritized, and when the temperature difference Tx is smaller than the predetermined value Ta (Tx ≦ Ta), priority is given to the operation of the first usage unit 4a. The aqueous medium heated in the first usage unit 4a is used in the heating operation in the target space sq by the hot water heating unit 9a connected to the first usage unit 4a. The 2nd utilization unit 10a which can perform heating operation has the characteristic that the inside of the object space sq can be heated earlier compared with the heating operation by the said hot water heating unit 9a. Therefore, when the temperature difference Tx is relatively large, the operation of the second usage unit 10a is prioritized, whereby the temperature Tr in the target space sq can be quickly brought closer to the first usage unit 4a target set temperature To. In addition, when the temperature difference Tx is relatively small, priority is given to the operation of the first usage unit 4a, so that the temperature in the target space rq approaches the target set temperature To slowly or becomes the target set temperature To. The temperature in the target space sq is kept.

(C)
Furthermore, according to the heat pump system 1 according to the present embodiment, when priority is given to the operation of the second usage unit 10a, the opening of the first usage-side flow rate adjustment valve 42a of the first usage unit 4a is controlled to be small. The That is, since the flow rate of the refrigerant flowing through the first usage-side heat exchanger 41a is reduced by reducing the opening of the first usage-side flow rate adjustment valve 42a, the operating load on the first usage unit 4a is reduced, 2 Usage unit 10a is prioritized.

(D)
Further, according to the heat pump system 1 according to the present embodiment, when priority is given to the operation of the first usage unit 4a, the opening degree of the second usage-side flow rate adjustment valve 102a of the second usage unit 10a is controlled to be small. The That is, since the flow rate of the refrigerant flowing through the second usage-side heat exchanger 101a is reduced by reducing the opening of the second usage-side flow rate adjustment valve 102a, the operating load on the second usage unit 10a is reduced, One usage unit 4a is prioritized.

<Second Embodiment>
In the first embodiment, when the opening degree of one of the first and second usage-side flow rate adjustment valves 42a, 102a is controlled in the priority control of one of the first and second usage units 4a, 10a. Explained. 2nd Embodiment demonstrates the case where priority control of any one of the 1st and 2nd utilization units 4a and 10a is performed by methods other than the method of controlling the opening degree of the said control valves 42a and 102a.

  FIG. 6 is a diagram conceptually showing the configuration of the heat pump system 200 according to the present embodiment. FIG. 7 is a schematic configuration diagram of a heat pump system 200 according to the present embodiment. FIG. 8 is a diagram schematically showing the configuration of the remote controller 211a according to the present embodiment. As shown in FIG. 6, the heat pump system 200 includes a heat source unit 202, a first usage unit 204a, a hot water storage unit 208a, a hot water heating unit 209a, a second usage unit 210a, a temperature sensor 307a, and remote controllers 211a and 211c. The second usage unit 210a and the hot water heating unit 209a are installed in the target space sq, as in the first embodiment.

  The remote controllers 211a and 211c can perform various settings related to the connected units 210a and 204a (209a) and instructions regarding operation control. In particular, the remote controller 211a also performs priority control of one of the first and second usage units 204a and 210a, like the remote controller 11a of the first embodiment. As shown in FIG. 8, the remote controller 211a includes a first communication unit 311a, a second communication unit 312a, an operation unit 313a, a display unit 314a, and a control unit 315a. The control unit 315a functions as a communication control unit 316a, a mode grasping unit 317a, a temperature difference calculation unit 318a, a first usage unit control unit 319a, and a second usage unit control unit 320a.

  The heat pump system 200 according to the present embodiment is the same as that of the first embodiment except for a specific method related to priority control of one of the first and second usage units 4a and 10a. That is, the heat source unit 202, the first usage unit 204a, the hot water storage unit 208a, the hot water heating unit 209a, the second usage unit 210a, the temperature sensor 307a, and the remote controller 211c of the heat pump system 200 are the heat pump system 1 according to the first embodiment. The heat source unit 2, the first usage unit 4a, the hot water storage unit 8a, the hot water heating unit 9a, the second usage unit 10a, the temperature sensor 107a, and the remote controller 11c have the same configuration. Accordingly, the first usage unit 204a includes the first usage-side heat exchanger 41a, the first usage-side flow rate adjustment valve 42a, the circulation pump 43a, and the like, and the second usage unit 10a includes the second usage-side heat exchange. Device 101a, second usage-side flow rate adjustment valve 102a, usage-side fan 105a, and the like. In FIG. 7, the detailed configuration of each unit 202, 204a, 208a, 209a, 210a is denoted by the same reference numeral as in FIG.

  In addition, the first communication unit 311a, the second communication unit 312a, the operation unit 313a, the display unit 314a, the communication control unit 316a that is a function of the control unit 315a, the mode grasping unit 317a, and the temperature difference calculation unit 318a of the remote controller 211a are The first communication unit 111a, the second communication unit 112a, the operation unit 113a, the display unit 114a, the communication control unit 116a that is a function of the control unit 115a, the mode grasping unit 117a, the temperature difference of the remote controller 11a according to the first embodiment. This is the same as the calculation unit 118a. Therefore, hereinafter, the first usage unit control unit 319a and the second usage unit control unit 320a of the remote controller 211a according to the present embodiment will be described.

(1-1) 1st utilization unit control part The 1st utilization unit control part 319a is the temperature difference Tx below predetermined value Ta (here predetermined value Ta is a positive value) similarly to 1st Embodiment. In some cases (Tx ≦ Ta), first operation control information for preferentially operating the first usage unit 204a is generated. Conversely, when the temperature difference Tx is greater than or equal to the predetermined value Ta (Tx ≧ Ta), the first usage unit control unit 319a is configured to reduce the operating load of the first usage unit 204a. First operation control information for controlling the first usage unit 204a so as to stop the operation or reduce the operation load is generated.

  Specifically, the first usage unit controller 319a according to the present embodiment reduces the flow rate of the circulation pump 43a of the first usage unit 204a when the temperature difference Tx is equal to or greater than a predetermined value Ta (Tx ≧ Ta). Thus, the operation load of the 1st utilization unit 204a is made small by performing flow control of the circulation pump 43a. Here, the reduction of the flow rate of the circulation pump 43a is realized by reducing the rotational speed of the circulation pump motor 44a. In this case, the flow rate of the circulation pump 43a is smaller than the flow rate of the circulation pump 43a when the temperature difference Tx is equal to or smaller than the predetermined value Ta (Tx ≦ Ta), that is, when the first usage unit 204a is preferentially operated. Thus, the flow rate adjustment is performed by the first usage unit controller 319a. As described above, the flow rate of the aqueous medium circulating on the aqueous medium circuit 80a is reduced by the circulation pump 43a of the first usage unit 204a, so that the aqueous medium flowing into the first usage-side heat exchanger 41a (that is, heat exchange) Therefore, the heat exchange between the aqueous medium and the refrigerant in the first usage-side heat exchanger 41a is difficult to be performed, and the operation load on the first usage unit 204a is reduced. Accordingly, the operation of the second usage unit 210a is prioritized over the first usage unit 204a.

  When the temperature difference Tx is equal to or less than the predetermined value Ta (Tx ≦ Ta), the first usage unit controller 319a performs the hot water supply operation so that the hot water supply operation is performed based on the target set temperature To of the first usage unit 204a. 1 Operation control information is generated. That is, when the temperature difference Tx is equal to or smaller than the predetermined value Ta, the first usage unit 204a is normally operated instead of the first operation control information considering the operation load of the first usage unit 204a as described above. First operation control information is generated. However, in this case, since the operation load is suppressed on the second usage unit 210a side, first operation control information that causes the first usage unit 204a to operate preferentially is generated as a result.

(1-2) Second Usage Unit Control Unit As in the first embodiment, the second usage unit control unit 320a has a temperature difference Tx equal to or greater than a predetermined value Ta (here, the predetermined value Ta is a positive value). In some cases (Tx ≧ Ta), second operation control information for preferentially operating the second usage unit 210a is generated. On the contrary, when the temperature difference Tx is equal to or smaller than the predetermined value Ta (Tx ≦ Ta), the second usage unit controller 320a is configured to reduce the operation load of the second usage unit 210a. Second operation control information for controlling the second usage unit 210a so as to stop the operation or reduce the operation load is generated.

  Specifically, the second usage unit controller 320a according to the present embodiment reduces the air volume of the usage-side fan 105a of the second usage unit 210a when the temperature difference Tx is equal to or smaller than the predetermined value Ta (Tx ≦ Ta). By performing the control, the operation load of the second usage unit 210a is reduced. Here, the reduction in the air volume of the use side fan 105a is realized by reducing the number of rotations of the use side fan motor 106a. In this case, the air volume of the use-side fan 105a is greater than the air volume of the use-side fan 105a when the temperature difference Tx is equal to or greater than the predetermined value Ta (Tx ≧ Ta), that is, when the second usage unit 210a is preferentially operated. The air volume is adjusted by the second usage unit controller 320a so as to be smaller. As described above, the amount of air sucked into the second usage unit 210a (that is, the air medium to be heat exchanged) is reduced by reducing the air volume of the usage-side fan 105a of the second usage unit 210a. Therefore, not much heat exchange is performed in the second usage-side heat exchanger 101a, and the rotational speed of the usage-side fan 105a is also reduced, so the operating load on the second usage unit 210a is reduced. Accordingly, the operation of the first usage unit 204a is prioritized over the second usage unit 210a.

  When the temperature difference Tx is equal to or greater than the predetermined value Ta (Tx ≧ Ta), the second usage unit controller 320a performs the second operation so as to perform the heating operation based on the target set temperature of the second usage unit 210a. Generate control information. That is, when the temperature difference Tx is equal to or greater than the predetermined value Ta, the second usage unit 210a is normally operated instead of the second operation control information considering the operation load of the second usage unit 210a as described above. Second operation control information is generated. However, in this case, since the operation load on the first usage unit 204a side is suppressed, the second operation control information that causes the second usage unit 210a to operate preferentially as a result. Will be generated.

(2) Operation FIG. 9 is a flowchart showing the overall operation of the heat pump system 200. In the following, as in FIG. 5, each functional unit of the control unit 315a of the remote controller 211a is collectively referred to as a “control unit 315a”.

  Steps S51 to S52: The control unit 315a of the remote controller 211a obtains the first operating status information of the first usage unit 204a and the second operating status information of the second usage unit 210a, and the current status of each usage unit 204a, 210a. By grasping the situation, the current mode of the heat pump system 200 is confirmed. When the mode of the heat pump system 200 is the “hot water supply / heating mode” (Yes in S51), the temperature sensor 307a provided in the second usage unit 210a detects the temperature Tr in the target space sq, and the remote controller 211a The 2 communication part 312a acquires this (S52).

  Step S53: The control unit 315a calculates the temperature difference Tx by subtracting the temperature Tr of step S52 from the target set temperature To of the first usage unit 204a (S53).

  Steps S54 to S55: When the temperature difference Tx obtained in Step S53 is larger than the predetermined value Ta (Yes in S54), the control unit 315a reduces the flow rate of the circulation pump 43a of the first usage unit 204a. The operation of the second usage unit 210a is prioritized (S55). Thereby, the flow rate of the aqueous medium flowing through the first usage-side heat exchanger 41a is reduced, and the operation load of the first usage unit 204a is suppressed. However, the temperature Tr in the target space sq is mainly the second usage unit 210a. Due to the operation, the target set temperature To of the first usage unit 204a is brought close to.

  Step S56: When the temperature difference Tx obtained in Step S53 is smaller than the predetermined value Ta (No in S54), the control unit 315a reduces the air volume of the usage-side fan 105a of the second usage unit 210a, The operation of the first usage unit 204a is prioritized (S56). Thereby, the operation load of the second usage unit 210a itself is suppressed, but the temperature Tr in the target space sq is brought closer to the target set temperature To of the first usage unit 204a mainly by the operation by the first usage unit 204a ( Or maintained).

  Step S57: As long as the mode of the heat pump system 200 is the “hot water supply / heating mode” (Yes in S57), the heat pump system 200 repeatedly performs the operations after Step S52. In steps S51 and S57, when the heat pump system 200 is not in the “hot water supply / heating mode” (No in S51, No in S57), the heat pump system 200 ends the series of operations described above.

(3) Effect (A)
According to the heat pump system 200 according to the present embodiment, when priority is given to the operation of the second usage unit 210a, the circulation pump so that the flow rate flowing to the first usage-side heat exchanger 41a of the first usage unit 204a is reduced. The flow rate of 43a is controlled. That is, the flow rate of the aqueous medium that is circulated on the aqueous medium circuit 80a by the circulation pump 43a is reduced, and the flow rate of the aqueous medium that is the target of heat exchange flowing into the first usage-side heat exchanger 41a is also reduced. Therefore, the operation load of the first usage unit 204a is reduced, and the operation of the second usage unit 210a is prioritized.

(B)
Further, according to the heat pump system 200 according to the present embodiment, when priority is given to the operation of the first usage unit 204a, the air volume of the usage-side fan 105a of the second usage unit 210a is controlled to decrease. That is, since the amount of air sucked into the second usage unit 210a (that is, the air medium to be heat exchanged) is reduced by reducing the air volume of the usage-side fan 105a, the second usage-side heat exchange is performed. In addition to the fact that heat exchange in the vessel 101a is not performed much, the rotational speed of the usage-side fan 105a is also reduced, so the operating load on the second usage unit 210a is reduced. Accordingly, the operation of the first usage unit 204a is prioritized over the second usage unit 210a.
<Other embodiments>
(A)
In the said 1st Embodiment, it demonstrated that control which makes the opening degree of the utilization side flow control valve 42a, 102a small was performed in the utilization unit 4a, 10a which is not given priority. In the second embodiment, when the first usage unit 204a is not prioritized, control is performed to reduce the flow rate of the circulation pump 43a. When the second usage unit 210a is not prioritized, the air volume of the usage-side fan 105a is controlled. It has been explained that the control for decreasing is performed.

  However, in the heat pump system 200 according to the present invention, when the first usage units 4a and 204a are prioritized, the operation capacity of the second usage units 10a and 210a is suppressed, and conversely the second usage units 10a and 210a are prioritized. In this case, since the operation control of each use unit 4a, 10a, 204a, 210a may be performed so as to suppress the operation capacity of the first use units 4a, 204a, the specific control content for suppressing the operation capacity is The present invention is not limited to the contents according to the first and second embodiments. For example, when giving priority to the first usage unit, control is performed to reduce the opening of the second usage-side flow rate adjustment valve of the second usage unit, but when giving priority to the second usage unit, the first usage unit is controlled. Control for reducing the flow rate of the circulation pump of the utilization unit may be performed. In addition, when giving priority to the first usage unit, control is performed to reduce the air volume of the usage-side fan of the second usage unit. However, when giving priority to the second usage unit, the first usage unit has the first usage unit. Control may be performed to reduce the opening of the usage-side flow rate control valve.

(B)
In the said 1st and 2nd embodiment, when the mode of the heat pump systems 1 and 200 is "hot water supply heating mode", about the case where priority control of any one of each utilization unit 4a, 10a, 204a, 210a is performed. explained. However, in the heat pump system according to the present invention, when both the first usage unit and the second usage unit are operating, it is only necessary to perform priority control of either the first usage unit or the second usage unit. When the system mode is the “hot water supply / cooling mode”, priority control of one of the first and second usage units may be performed.

(C)
In the said 1st and 2nd embodiment, the case where the heat pump systems 1 and 200 were the structures shown in FIG. 2, FIG. 7 was demonstrated. However, the heat pump system according to the present invention can also be applied to the configuration as shown in FIG.

  A heat pump system 400 according to FIG. 10 includes a heat source unit 2, a first usage unit 4a, a hot water storage unit 8a, a hot water heating unit 9a, a second usage unit 10a, a temperature sensor 107a, and a remote controller (not shown). In addition, since it is the same as that of FIG. 2 except the 1st utilization unit 4a, the same code | symbol as FIG. 2 is attached | subjected.

  The usage unit 4a constitutes a part of the heat source side refrigerant circuit 20 and a part of the aqueous medium circuit 80a, and constitutes a usage side refrigerant circuit 40a. About the part which comprises a part of heat source side refrigerant circuit 20 and a part of aqueous medium circuit 80a, it is the same as that of 1st Embodiment.

  As shown in FIG. 10, the use side heat source circuit 40a includes a use side compressor 62a, a refrigerant-water heat exchanger 65a, a refrigerant-water heat exchange side flow rate adjustment valve 66a, and a first use side heat exchanger 41a as refrigerant pipes. It is configured by being connected via 71a, 70a, 72a, 68a, 69a.

  The use-side compressor 62a is a mechanism for compressing the use-side refrigerant, and a hermetic compressor is employed as in the heat source-side compressor 21 according to FIG. The usage-side compressor 62a is driven by a usage-side compressor motor 63a, and the usage-side compressor motor 63a can rotate such that the rotation speed (that is, the operating frequency) can be varied. Further, a cascade side discharge pipe 70a is connected to the discharge of the use side compressor 62a, and a cascade side intake pipe 71a is connected to the intake of the use side compressor 62a. An accumulator 67a is connected on the cascade side suction pipe 71a, and the cascade side suction pipe 71a is connected to a second cascade side gas refrigerant pipe 69a.

  The refrigerant-water heat exchanger 65a is a heat exchanger that functions as a heat radiator for the use-side refrigerant by performing heat exchange between the use-side refrigerant and the aqueous medium. In the refrigerant-water heat exchanger 65a, a cascade side liquid refrigerant pipe 68a and a first cascade side gas refrigerant pipe 72a are respectively connected to the liquid side and the gas side of the flow path through which the use side refrigerant flows. Moreover, the 1st utilization side water inlet pipe 47a and the 1st utilization side water outlet pipe 48a are each connected to the inlet side and outlet side of the flow path through which an aqueous medium flows among the refrigerant | coolant-water heat exchangers 65a. . The first cascade side gas refrigerant pipe 72a is connected to the cascade side discharge pipe 70a.

  The refrigerant-water heat exchange side flow rate adjustment valve 66a is an electric expansion valve capable of varying the flow rate of the use side refrigerant flowing through the refrigerant-water heat exchanger 65a by controlling the opening, and the cascade side liquid refrigerant. It is provided in the pipe 68a.

  The first usage-side heat exchanger 41a is a heat exchanger that functions as a heat-source-side refrigerant radiator by performing heat exchange between the heat-source-side refrigerant and the usage-side refrigerant. In the first usage-side heat exchanger 41a, a first usage-side liquid refrigerant tube 45a and a first usage-side discharge refrigerant tube 46a are respectively connected to the liquid side and the gas side of the flow path through which the heat source side refrigerant flows. . A cascade side liquid refrigerant pipe 68a and a second cascade side gas refrigerant pipe 69a are respectively connected to the liquid side and the gas side of the flow path through which the usage side refrigerant flows in the first usage side heat exchanger 41a.

  2 and 7, the first usage unit 4a having the above-described usage-side heat source circuit 40a is added to the first usage-side heat exchanger 41a of the heat source-side refrigerant introduced from the refrigerant communication tube 12. By functioning as a radiator, the heat-source-side refrigerant radiated in the first usage-side heat exchanger 41a is led out to the refrigerant communication tube 13, and the usage-side refrigerant circuit is radiated by the heat radiation of the heat-source-side refrigerant in the first usage-side heat exchanger 41a. The use side refrigerant circulating in 40a is heated. And the 1st utilization unit 4a performs the hot-water supply operation which heats an aqueous medium by thermally radiating in the refrigerant | coolant-water heat exchanger 65a, after this heated utilization side refrigerant | coolant is compressed in the utilization side compressor 62a. Is possible.

(D)
Further, the heat pump system according to the present invention is not limited to the system configured as shown in FIG. 2 and FIG. 10, and can be applied to the system configured as shown in FIG. In the system of FIG. 11, an aqueous medium utilization unit 4a and an air medium utilization unit 10a are connected to one heat source unit 2, and the aqueous medium utilization unit 4a further includes a heating operation such as floor heating. The heating device 9a capable of performing the above is connected. Although not shown in FIG. 11, a temperature sensor is provided in the second usage unit 10a of the system of FIG. 11, and a remote controller is connected to the second usage unit 10a.

  The second usage unit 10a and the heating device 9a are both installed in one target space. In the second usage unit 10a, the conditioned air heat-exchanged by the second usage-side heat exchanger 101a is supplied into the target space by the usage-side fan 105a. In the first usage unit 4a, the aqueous medium is heated in the first usage-side heat exchanger 41a, and the heated aqueous medium is supplied to the heating device 9a and used for heating in the target space.

(E)
In the first and second embodiments and other embodiments (c), the case where one second usage unit is provided in one target space sq has been described. However, the number of second usage units provided in the target space sq is not limited to one, but may be a plurality. As an example, FIG. 12 shows a schematic configuration in the case where two second usage units are provided in the circuit configuration of FIG. 2 (second usage units 10a and 10b in FIG. 12), and FIG. FIG. 13 shows a schematic configuration in the case where two second usage units are provided in the circuit configuration (second usage units 10a and 10b in FIG. 13).

  As described above, when there are a plurality of second usage units 10a and 10b, the second usage units 10a and 10b are used by using the temperature Tr detected by the temperature sensors 107a and 107b in the respective second usage units 10a and 10b. , 10b, the temperature difference Tx is calculated, and the operation capacity of each of the second usage units 10a, 10b is controlled based on the calculated temperature difference Tx.

  Further, when a plurality of second usage units 10a and 10b are installed in the target space sq, when at least one of the second usage units 10a and 10b is stopped, the usage-side fan 105a. 105b, for example, may be controlled to drive for 1 minute. When the usage-side fans 105a and 105b are stopped, the air in the target space sq is not taken into the second usage units 10a and 10b, so the temperature sensors 107a and 107b detect the temperature Tr in the target space sq. Because it is difficult to do. When the usage-side fans 105a and 105b are driven, an air flow is generated in each usage unit 10a and 10b so that the air in the target space sq is taken in, so that each temperature sensor 107a and 107b is in the target space sq. The temperature Tr can be detected.

(F)
In the heat pump system according to the present invention, the number of first usage units is not limited to one, and a plurality of first usage units may be provided. As an example, FIG. 14 shows a schematic configuration when two first usage units 4a are provided in the circuit configuration of FIG. 2 (first usage units 4a and 4b in FIG. 14), and FIG. 10 shows a schematic configuration when two first usage units are provided in 10 circuit configurations (first usage units 4a and 4b in FIG. 15). Thus, when a plurality of first usage units are provided, the first usage units are connected in parallel to each other. Even in such a case, the first and second usage units operate based on the temperature difference between the indoor temperature detected by the temperature sensor in the second usage unit and the target set temperature of the first usage unit. Capacity is controlled.

(G)
Furthermore, in the heat pump system according to the present invention, a plurality of first and second usage units may be provided. As an example, FIG. 16 shows a schematic configuration when two usage units are provided in the circuit configuration of FIG. 2 (utilization units 4a, 4b, 10a, 10b of FIG. 16). FIG. 10 shows a schematic configuration when two usage units are provided in the circuit configuration of FIG. 10 (utilization units 4a, 4b, 10a, 10b in FIG. 17).

  12 to 17, detailed illustration of the hot water heating units 9a and 209a, the hot water storage units 8a and 208a, the aqueous medium circuit 80a, and the like is omitted.

(H)
In the first and second embodiments, when the heat pump system is in the “hot water supply / heating mode”, the temperature Tr in the target space sq is periodically detected, and each of the usage units 4a and 10a is detected using the temperature Tr. , 204a, 210a, the case where priority control is performed has been described. However, before detecting the temperature Tr in the target space sq, the controllers 115a and 315a may monitor the discharge pressure of the heat source side compressor 21 of the heat source unit 2 in advance. The control units 115a and 315a determine that the rated capacity of the second heat source unit 2 has exceeded when the discharge pressure is lower than a predetermined value. In this case, the temperature difference Tx between the temperature Tr and the target set temperature To You may perform priority control based on.

  The heat pump system according to the present invention can suppress the fear that the sum of the operating capacity of the first usage unit and the operating capacity of the second usage unit exceeds the heating rated capacity of the heat source unit, and stabilizes the target space. It has the effect that it can be heated. In the heat pump system according to the present invention, a first usage unit capable of heating an aqueous medium and a second usage unit for heating using an air medium are connected to one heat source unit, and the heated aqueous medium Can be applied to systems used for heating.

DESCRIPTION OF SYMBOLS 1 Heat pump system 2 Heat source unit 4a 1st utilization unit 8a Hot water storage unit 9a Hot water heating unit 10a, 10b 2nd utilization unit 11a, 11c Remote controller 41a 1st utilization side heat exchanger 42a 1st utilization side flow control valve 43a Circulation pump 101a Second usage side heat exchanger 102a Second usage side flow rate adjustment valve 105a Usage side fan 107a Temperature sensor 114a Display unit 117a Temperature difference calculation unit 118a Mode grasping unit 119a First usage unit control unit 120a Second usage unit control unit

JP 2000-46417 A

Claims (6)

A heat source unit (2,202);
A first usage unit (4a, 204a) connected to the heat source unit (2, 202) and having a first usage side heat exchanger (41a) for exchanging heat between the refrigerant and the aqueous medium;
A second usage unit (10a, 210a) connected to the heat source unit (2, 202) and having a second usage side heat exchanger (101a) for exchanging heat between the refrigerant and the air medium;
A target space in which heating is performed using the aqueous medium heat-exchanged in the first usage-side heat exchanger (41a) and the air medium heat-exchanged in the second usage-side heat exchanger (101a). A temperature detector (107a, 307a) for detecting the temperature;
When the first usage unit (4a, 204a) and the second usage unit (10a, 210a) are operating together, the target set temperature of the first usage unit (4a, 204a) and the temperature detection unit A temperature difference calculation unit (118a, 318a) for calculating a temperature difference from the temperature detected by (107a, 307a);
Based on the temperature difference calculated by the temperature difference calculation unit (118a, 318a), a control unit that controls the operation load of the first usage unit (4a, 204a) and the second usage unit (10a, 210a). (119a, 120a, 319a, 320a),
A heat pump system (1,200). The temperature detector (107a, 307a) is provided in the second usage unit (10a, 210a),
The control unit (119a, 120a, 319a, 320a)
When the temperature difference is equal to or greater than a predetermined value, the second usage unit (10a, 210a) is preferentially operated,
When the temperature difference is equal to or less than the predetermined value, the first usage unit (4a, 204a) is preferentially operated.
The heat pump system (1,200) according to claim 1. The first usage unit (4a) further includes a first usage-side flow rate adjustment valve (42a) that varies the flow rate of the refrigerant flowing through the first usage-side heat exchanger (41a).
When the temperature difference is equal to or greater than the predetermined value, the control unit (119a) controls the opening of the first usage-side flow rate adjustment valve (42a) to be smaller than when the temperature difference is equal to or less than the predetermined value. By performing the above, the second usage unit (10a) is preferentially operated.
The heat pump unit (1) according to claim 2. The first usage unit (204a) includes a circulation pump (43a) that circulates the aqueous medium in an aqueous medium circuit (80a) in which the aqueous medium that performs heat exchange in the first usage-side heat exchanger (41a) flows. In addition,
The controller (319a) controls the flow rate of the circulation pump (43a) so that the flow rate of the circulation pump (43a) decreases when the temperature difference is equal to or greater than the predetermined value. Preferential operation of the usage unit (210a),
The heat pump unit (200) according to claim 2. The second usage unit (10a) further includes a second usage-side flow rate adjustment valve (102a) that varies the flow rate of the refrigerant flowing through the second usage-side heat exchanger (101a).
When the temperature difference is equal to or less than the predetermined value, the control unit (120a) controls the opening of the second usage-side flow rate adjustment valve (102a) to be smaller than when the temperature difference is equal to or greater than the predetermined value. By performing the above, the first usage unit (4a) is preferentially operated.
The heat pump unit (1) according to any one of claims 2 to 4. The second usage unit (210a) further includes a fan (105a) that generates an air flow in which conditioned air is supplied to the target space,
When the temperature difference is equal to or less than the predetermined value, the control unit (320a) performs control to reduce the air volume of the fan (105a) of the second usage unit (210a), thereby the first usage unit. (204a) is preferentially driven,
The heat pump unit (200) according to any one of claims 2 to 4.

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