JPWO2016071950A1 - Air conditioning system - Google Patents

Abstract

The air conditioning system 100 includes a refrigeration cycle circuit 20 having a first indoor heat exchanger 12, a second indoor heat exchanger 13, and a third indoor heat exchanger 14, and a first indoor heat exchanger 12 and a second indoor heat exchange. The indoor air conditioning indoor unit 1 in which the cooler 13 is housed, the individual air conditioning indoor unit 2 in which the third indoor heat exchanger 14 is housed, and a flow path or third room in which the refrigerant flows to the second indoor heat exchanger 13 A refrigerant flow switching device 15 that switches the refrigerant flow path to the flow path through which the refrigerant flows to the heat exchanger 14.

Description

  The present invention relates to an air conditioning system.

  Conventionally, air in a plurality of air-conditioned spaces (rooms, etc.) is collected in one place (hereinafter referred to as a common space), cooled or heated, and cooled or ventilated via a ventilation path such as a duct connecting the common space and each air-conditioned space. A whole-building air conditioning system that air-conditions each air-conditioned space by supplying heated air has been proposed.

  Moreover, what was provided with the refrigerating cycle circuit is proposed in the conventional whole building air conditioning system. Such a refrigeration cycle circuit includes a compressor, a four-way valve, an outdoor heat exchanger, an expansion device, and an indoor heat exchanger. The refrigeration cycle circuit is filled with a refrigerant.

  A conventional entire building air conditioning system including a refrigeration cycle circuit operates as follows when air-conditioning each air-conditioned space.

  When cooling each air-conditioned space, the refrigerant compressed by the compressor becomes a high-temperature and high-pressure gas refrigerant and is sent to the outdoor heat exchanger. The refrigerant flowing into the outdoor heat exchanger is liquefied by releasing heat to the air. The liquefied refrigerant is decompressed by the expansion device to be in a gas-liquid two-phase state, and is gasified by absorbing heat from the air in the common space by the indoor heat exchanger (by cooling the air). The gasified refrigerant returns to the compressor. On the other hand, the air cooled by the indoor heat exchanger is supplied to each air-conditioned space through the ventilation path. Thereby, it becomes possible to cool each air-conditioned space.

  When heating each air-conditioned space, the refrigerant compressed by the compressor becomes a high-temperature and high-pressure gas refrigerant and is sent to the indoor heat exchanger. The refrigerant flowing into the indoor heat exchanger is liquefied by releasing heat to the air in the common space (by heating the air). The liquefied refrigerant is decompressed by the expansion device to be in a gas-liquid two-phase state, and is gasified by absorbing heat from ambient air in the outdoor heat exchanger. The gasified refrigerant returns to the compressor. On the other hand, the air heated by the indoor heat exchanger is supplied to each air-conditioned space through the ventilation path. Thereby, it becomes possible to heat each air-conditioned space.

  In addition, the conventional whole building air conditioning system has ventilation means for adjusting the amount of air supplied from the common space to each air-conditioned space corresponding to each air-conditioned space in order to realize air conditioning that meets the demand in each air-conditioned space. A provided one has also been proposed (for example, Patent Document 1).

JP-A-9-079648

  As described above, the conventional whole building air conditioning system is configured to distribute the air cooled or heated in one place (shared space) to each air conditioning space. However, with such a method, it is difficult to concentrate the air conditioning capability in an air conditioned space with a large load fluctuation such as a living room and a living dining kitchen. For this reason, the conventional whole-building air conditioning system has a problem that in an air-conditioned space with a large load fluctuation, the indoor temperature is far from the set temperature (the indoor target temperature), and the comfort is lowered.

  The present invention has been made to solve the above-described problems, and even when the air conditioning load becomes large in an air conditioning space (living room, living dining kitchen, etc.) with large load fluctuation in the entire building air conditioning, the air conditioning space is concerned. An object of the present invention is to provide an air conditioning system capable of suppressing a decrease in comfort.

  An air conditioning system according to the present invention includes a compressor, an outdoor heat exchanger, an expansion device, a first indoor heat exchanger, a second indoor heat exchanger, and a third indoor heat exchanger, and the first indoor heat exchange. A refrigeration cycle circuit that cools or heats air with a refrigerant supplied to the second indoor heat exchanger and the third indoor heat exchanger, the first indoor heat exchanger, and the second indoor heat exchanger A common space that includes a stored first indoor unit and a second indoor unit in which the third indoor heat exchanger is stored, and the first indoor unit communicates with a plurality of air-conditioned spaces through a ventilation path. The second indoor unit is provided in at least one of the plurality of air-conditioned spaces, and the refrigeration cycle circuit further includes a flow of refrigerant to the second indoor heat exchanger. Cut the refrigerant flow path into the flow path or the flow path through which the refrigerant flows to the third indoor heat exchanger. And has a refrigerant flow switching device changing.

  In the air conditioning system according to the present invention, the first indoor unit is an indoor air conditioning unit that cools or heats the air in the common space, that is, the air supplied to each air conditioning space. The second indoor unit is an individual air conditioning indoor unit that directly cools or heats the air in the air-conditioned space in which the second indoor unit is installed. For this reason, the air conditioning system according to the present invention individually switches the air in the air-conditioned space in which the second indoor unit is installed by switching the refrigerant flow switching device to the flow path through which the refrigerant flows to the third indoor heat exchanger. It can be cooled or heated. For this reason, even if the air conditioning system according to the present invention installs the second indoor unit in an air conditioned space (living room and living dining kitchen etc.) with a large load fluctuation, It becomes possible to rapidly cool or rapidly heat the air-conditioned space. Therefore, the air conditioning system according to the present invention can suppress a decrease in comfort of the air-conditioned space even when the air-conditioning load increases in the air-conditioned space.

It is the schematic of the air conditioning system which concerns on embodiment of this invention. It is a refrigerant circuit diagram which shows the refrigerating cycle circuit of the air conditioning system which concerns on embodiment of this invention. It is an operation | movement figure which shows the state in which the air conditioning system which concerns on embodiment of this invention is performing only the whole building air conditioning. It is an operation figure showing the state where the air harmony system concerning an embodiment of the invention is performing whole building air conditioning and individual air conditioning. It is a flowchart which shows control of the refrigerant | coolant flow path switching apparatus of the air conditioning system which concerns on embodiment of this invention. It is a refrigerant circuit figure which shows another example of the refrigerating cycle circuit of the air conditioning system which concerns on embodiment of this invention. It is an operation | movement figure which shows an example of the air conditioning system operation state which concerns on embodiment of this invention. It is the schematic of another example of the air conditioning system which concerns on embodiment of this invention.

Embodiment.
FIG. 1 is a schematic diagram of an air conditioning system according to an embodiment of the present invention.
Here, in the present embodiment, as shown in FIG. 1, an example in which the air conditioning system 100 according to the present embodiment is installed in a building having three air-conditioned spaces 202 to 204 will be described. Moreover, in this Embodiment, as shown in FIG. 1, the example which used the duct 205 as a ventilation path which connects the air-conditioning space 202-204 and the shared space 201 is demonstrated. However, the building where the air conditioning system 100 according to the present embodiment is installed is not limited to that shown in FIG. For example, the air conditioning system 100 according to the present embodiment may be installed in a building having two air-conditioned spaces and a building having four or more air-conditioned spaces. Further, for example, an opening formed in a wall or door that separates the common space 201 and the air-conditioned spaces 202 to 204, a louver, or the like may be used as the ventilation path.
The common space 201 is, for example, a space such as a floor under a building or a ceiling. The air-conditioned spaces 202 to 204 are, for example, rooms provided in a building.

  The air conditioning system according to the present embodiment includes a refrigeration cycle circuit 20, a whole-building air conditioning indoor unit 1, an individual air conditioning indoor unit 2, and the like. Although details will be described later, the refrigeration cycle circuit 20 includes a first indoor heat exchanger 12, a second indoor heat exchanger 13, a third indoor heat exchanger 14, and a refrigerant flow path that are connected to the outdoor unit 3 through a refrigerant pipe 18. A switching device 15 and the like are provided. The 1st indoor heat exchanger 12, the 2nd indoor heat exchanger 13, and the 3rd indoor heat exchanger 14 cool or heat surrounding air with the supplied refrigerant. The refrigerant flow switching device 15 switches the flow path of the refrigerant supplied from the outdoor unit 3 to a flow path through which the refrigerant flows to the second indoor heat exchanger 13 or a flow path through which the refrigerant flows to the third indoor heat exchanger 14. Is.

The entire building air conditioning indoor unit 1 houses a first indoor heat exchanger 12 and a second indoor heat exchanger 13. This whole-building air conditioning indoor unit 1 is provided in the common space 201. That is, the indoor air conditioning indoor unit 1 includes the first indoor heat exchanger 12 and the second indoor heat exchanger 13, and the air in the common space 201, that is, from the common space 201 to the air conditioned spaces 202 to 204 via the duct 205. The supplied air is cooled or heated. The individual indoor unit 2 for air conditioning accommodates the third indoor heat exchanger 14. The individual air conditioning indoor unit 2 is provided in an air conditioned space 204 having a large load fluctuation, such as a living room and a living dining kitchen. That is, the individual air conditioning indoor unit 2 cools or heats the air in the air-conditioned space 204 individually.
Here, the entire building air conditioning indoor unit 1 corresponds to the first indoor unit of the present invention. The individual air conditioning indoor unit 2 corresponds to the second indoor unit of the present invention. The air-conditioned space 204 corresponds to the individual air-conditioned space of the present invention.

  In addition, the air conditioning system 100 according to the present embodiment includes a temperature detection device 36 and a control device 50 so that the refrigerant flow switching device 15 can be automatically switched. The temperature detection device 36 is provided in the conditioned space 204 where the individual air conditioning indoor unit 2 is provided, and detects the temperature of the conditioned space 204. The control device 50 is configured by, for example, a microcomputer and controls the refrigerant flow switching device 15, and includes a storage unit 51 and a control unit 52. The memory | storage part 51 memorize | stores the preset temperature (indoor target temperature) of the air-conditioning space 204. FIG. The controller 52 controls switching of the refrigerant flow switching device 15. Specifically, the control unit 52 of the control device 50 becomes a flow path through which the refrigerant flows to the second indoor heat exchanger 13 when the comparison value that is the difference between the set temperature and the detected temperature of the temperature detection device 36 is equal to or less than the threshold value. Thus, the refrigerant flow switching device 15 is controlled. Moreover, the control part 52 of the control apparatus 50 becomes a flow path through which a refrigerant | coolant flows into the 3rd indoor heat exchanger 14, when the comparison value which is a difference of preset temperature and the detection temperature of the temperature detection apparatus 36 is larger than a threshold value. Next, the refrigerant flow switching device 15 is controlled. This threshold value is stored in the storage unit 51.

Furthermore, the air conditioning system 100 according to the present embodiment adjusts the amount of air supplied from the common space 201 to each of the air-conditioned spaces 202 to 204, so that the air volume variable device provided corresponding to the air-conditioned spaces 202 to 204 is provided. 31-33. In the present embodiment, one end of the duct 205 is branched and connected to each of the air-conditioned spaces 202 to 204, and the air volume varying devices 31 to 33 are provided at these branched portions. The air volume variable devices 31 to 33 have, for example, a closing member that covers the internal flow path formed in the air volume variable devices 31 to 33 so as to be freely opened and closed. The amount of air supplied to the conditioned spaces 202 to 204 can be adjusted. Thereby, the air conditioning according to a request | requirement is realizable in each air conditioned space 202-204 at the time of whole building air conditioning.
In addition, if the air volume varying devices 31 to 33 are provided corresponding to the air-conditioned spaces 202 to 204, their installation positions are arbitrary.

  In the present embodiment, the control unit 52 of the control device 50 controls the air volume variable devices 31 to 33. Specifically, the control unit 52 controls the air volume variable devices 31 to 33 based on the difference between the set temperature of each of the air-conditioned spaces 202 to 204 and the room temperature. For example, as the difference between the set temperature of each air-conditioned space 202 to 204 and the room temperature is larger, the amount of air supplied from the shared space 201 to each air-conditioned space 202 to 204 is increased. For this reason, the air conditioning system 100 according to the present embodiment includes temperature detection devices 34 and 35 that detect the temperatures of the air-conditioned spaces 202 and 203. In addition, the storage unit 51 of the control device 50 is configured to store the set temperatures of the air-conditioned spaces 202 and 203.

FIG. 2 is a refrigerant circuit diagram illustrating a refrigeration cycle circuit of the air-conditioning system according to the embodiment of the present invention.
The refrigeration cycle circuit 20 according to the present embodiment includes a compressor 10, an outdoor heat exchanger 11, an expansion device 17, a first indoor heat exchanger 12, a second indoor heat exchanger 13, a third indoor heat exchanger 14, and A refrigerant flow switching device 15 is provided. The refrigeration cycle circuit 20 according to the present embodiment also includes a four-way valve 16 in order to realize both cooling and heating in the air conditioning system 100.

  The compressor 10 sucks refrigerant and compresses the refrigerant to a high temperature and high pressure state. The kind of the compressor 10 is not specifically limited, For example, the compressor 10 can be comprised using various types of compression mechanisms, such as a reciprocating, a rotary, a scroll, or a screw. The compressor 10 may be of a type that can be variably controlled by an inverter or the like. A four-way valve 16 is connected to the discharge port and the suction port of the compressor 10.

  The four-way valve 16 connects the discharge port of the compressor 10 to the outdoor heat exchanger 11 or the indoor heat exchanger (the first indoor heat exchanger 12, the second indoor heat exchanger 13, and the third indoor heat exchanger 14). To the other of the outdoor heat exchanger 11 or the indoor heat exchanger (the first indoor heat exchanger 12, the second indoor heat exchanger 13, and the third indoor heat exchanger 14). It is to switch.

  The outdoor heat exchanger 11 is an air heat exchanger that exchanges heat between refrigerant flowing inside and outdoor air. An outdoor fan that supplies outdoor air to be heat exchanged to the outdoor heat exchanger 11 may be provided around the outdoor heat exchanger 11. The outdoor heat exchanger 11 is connected to the first indoor heat exchanger 12, the second indoor heat exchanger 13, and the third indoor heat exchanger 14 via an expansion device 17.

  The expansion device 17 is an expansion valve, for example, and expands the refrigerant by decompressing it.

  The first indoor heat exchanger 12, the second indoor heat exchanger 13, and the third indoor heat exchanger 14 are pneumatic heat exchangers that exchange heat between the refrigerant flowing inside and the ambient air. Around the first indoor heat exchanger 12, the second indoor heat exchanger 13, and the third indoor heat exchanger 14, the indoor air to be heat exchanged is transferred to the first indoor heat exchanger 12 and the second indoor heat exchanger 13. And it is good to provide the indoor air blower supplied to the 3rd indoor heat exchanger 14.

  As described above, the refrigerant flow switching device 15 uses the flow path of the refrigerant supplied from the outdoor unit 3, the flow path of the refrigerant to the second indoor heat exchanger 13, or the refrigerant to the third indoor heat exchanger 14. The flow channel is switched.

  The drive, stop, and rotation speed of the compressor 10 are controlled by the control unit 52 of the control device 50. The flow path switching of the four-way valve 16 is also controlled by the control unit 52 of the control device 50.

  Each component of the refrigeration cycle circuit 20 described above is housed in the indoor air conditioning indoor unit 1, the individual air conditioning indoor unit 2, and the outdoor unit 3. Specifically, the indoor air conditioning indoor unit 1 houses a first indoor heat exchanger 12 and a second indoor heat exchanger 13. A third indoor heat exchanger 14 is accommodated in the individual air conditioning indoor unit 2. Further, the outdoor unit 3 houses a compressor 10, an outdoor heat exchanger 11, a four-way valve 16, and an expansion device 17. The installation position of the refrigerant flow switching device 15 is arbitrary. For example, the refrigerant flow switching device 15 may be stored in the indoor air conditioning indoor unit 1, may be stored in the individual air conditioning indoor unit 2, or may be stored in the outdoor unit 3.

[Description of operation]
Next, the operation of the air conditioning system 100 will be described.

[Entire air conditioning only]
FIG. 3 is an operation diagram showing a state in which the air conditioning system according to the embodiment of the present invention performs only the entire building air conditioning.
Hereinafter, the case where the air conditioning system 100 performs only the entire building air conditioning will be described with reference to FIG. 3 and FIG. 2 described above.

As shown in FIG. 3, the air conditioning system 100 normally air-conditions the air-conditioned spaces 202 to 204 using only the entire building air-conditioning.
In this case, when the air-conditioned spaces 202 to 204 are cooled, the air conditioning system 100 operates as follows. The refrigerant compressed by the compressor 10 becomes a high-temperature and high-pressure gas refrigerant and is sent to the outdoor heat exchanger 11. The refrigerant flowing into the outdoor heat exchanger 11 is liquefied by releasing heat to the ambient air. The liquefied refrigerant is decompressed by the expansion device 17 and becomes a gas-liquid two-phase state.

  When only the entire building air conditioning is performed, the refrigerant flow switching device 15 is switched to the flow path through which the refrigerant flows to the second indoor heat exchanger 13. For this reason, the refrigerant that has been decompressed by the expansion device 17 and is in a gas-liquid two-phase state flows into the first indoor heat exchanger 12 and the second indoor heat exchanger 13 and absorbs heat from the air in the shared space 201. Gasification (by cooling the air). The gasified refrigerant returns to the compressor 10. On the other hand, the air in the common space 201 cooled by the first indoor heat exchanger 12 and the second indoor heat exchanger 13 passes through the duct 205 as shown in FIG. To 204. Thereby, it becomes possible to cool each air-conditioned space 202-204. The air supplied to each of the air-conditioned spaces 202 to 204 is adjusted to an amount corresponding to the difference between the set temperature of each of the air-conditioned spaces 202 to 204 and the room temperature by the air volume variable devices 31 to 33.

  In addition, when the air-conditioned spaces 202 to 204 are heated only by the entire building air conditioning, the air conditioning system 100 operates as follows. The refrigerant compressed by the compressor 10 becomes a high-temperature and high-pressure gas refrigerant. Here, as described above, when only the entire building air conditioning is performed, the refrigerant flow switching device 15 is switched to the flow path through which the refrigerant flows to the second indoor heat exchanger 13. For this reason, the high-temperature and high-pressure gas refrigerant compressed by the compressor 10 is sent to the first indoor heat exchanger 12 and the second indoor heat exchanger 13. The refrigerant that has flowed into the first indoor heat exchanger 12 and the second indoor heat exchanger 13 is liquefied by releasing heat to the air in the shared space 201 (by heating the air). The liquefied refrigerant is decompressed by the expansion device 17 to be in a gas-liquid two-phase state, and is gasified by absorbing heat from ambient air in the outdoor heat exchanger 11. The gasified refrigerant returns to the compressor 10. On the other hand, the air in the common space 201 heated by the first indoor heat exchanger 12 and the second indoor heat exchanger 13 passes through each duct 202 as shown by a white arrow in FIG. To 204. Thereby, it becomes possible to heat each air-conditioned space 202-204. The air supplied to each of the air-conditioned spaces 202 to 204 is adjusted to an amount corresponding to the difference between the set temperature of each of the air-conditioned spaces 202 to 204 and the room temperature by the air volume variable devices 31 to 33.

[Entire air conditioning + Individual air conditioning]
FIG. 4 is an operation diagram showing a state in which the air conditioning system according to the embodiment of the present invention performs whole building air conditioning and individual air conditioning.
Hereinafter, the case where the air conditioning system 100 performs only the entire building air conditioning will be described with reference to FIG. 4 and FIG. 2 described above.

  The air-conditioned space 204 is an air-conditioned space with a large load fluctuation such as a living room and a living-dining kitchen. For this reason, the air-conditioning load of the air-conditioned space 204 may increase due to people coming in and out, heat during cooking, and the like. In this case, the control unit 52 of the control device 50 switches the refrigerant flow switching device 15 to a flow path through which the refrigerant flows to the third indoor heat exchanger 14. As described above, the control unit 52 of the control device 50 according to the present embodiment has the third indoor heat exchanger 14 when the comparison value that is the difference between the set temperature and the detected temperature of the temperature detecting device 36 is larger than the threshold value. The flow path of the refrigerant flow switching device 15 is switched so as to be a flow path through which the refrigerant flows.

  When the air-conditioned spaces 202 to 204 are cooled by the entire building air conditioning and the individual air conditioning, the air conditioning system 100 operates as follows. The refrigerant compressed by the compressor 10 becomes a high-temperature and high-pressure gas refrigerant and is sent to the outdoor heat exchanger 11. The refrigerant flowing into the outdoor heat exchanger 11 is liquefied by releasing heat to the ambient air. The liquefied refrigerant is decompressed by the expansion device 17 and becomes a gas-liquid two-phase state. When performing the entire building air conditioning and the individual air conditioning, the refrigerant flow switching device 15 is switched to the flow path through which the refrigerant flows to the third indoor heat exchanger 14. For this reason, the refrigerant that has been decompressed by the expansion device 17 and is in a gas-liquid two-phase state flows into the first indoor heat exchanger 12 and the third indoor heat exchanger 14.

  The gas-liquid two-phase refrigerant flowing into the first indoor heat exchanger 12 is gasified by absorbing heat from the air in the shared space 201 (by cooling the air). The gasified refrigerant returns to the compressor 10. In addition, the air in the common space 201 cooled by the first indoor heat exchanger 12 is supplied to the air-conditioned spaces 202 and 203 through the duct 205 as shown by white arrows in FIG. As a result, the air-conditioned spaces 202 and 203 can be cooled. The air supplied to the air-conditioned spaces 202 and 203 is adjusted by the air volume variable devices 31 and 32 to an amount corresponding to the difference between the set temperature of the air-conditioned spaces 202 and 203 and the room temperature. In the present embodiment, the air volume varying device 33 is fully closed, and the supply of air from the shared space 201 to the air-conditioned space 204 that is individually air-conditioned is stopped. Thereby, it can suppress that the air conditioning capability of the whole building air conditioning is insufficient.

  On the other hand, the gas-liquid two-phase refrigerant flowing into the third indoor heat exchanger 14 is gasified by absorbing heat from the air in the air-conditioned space 204 (by cooling the air). The gasified refrigerant returns to the compressor 10. Further, the air cooled by the third indoor heat exchanger 14 returns to the conditioned space 204 again as shown by the white arrow in FIG. Thereby, the air-conditioned space 204 can be cooled separately from the air-conditioned spaces 202 and 203.

  When the air-conditioned spaces 202 to 204 are heated by the entire building air conditioning and the individual air conditioning, the air conditioning system 100 operates as follows. The refrigerant compressed by the compressor 10 becomes a high-temperature and high-pressure gas refrigerant. Here, as described above, when the entire building air conditioning and the individual air conditioning are performed, the refrigerant flow switching device 15 is switched to the flow path through which the refrigerant flows to the third indoor heat exchanger 14. For this reason, the high-temperature and high-pressure gas refrigerant compressed by the compressor 10 is sent to the first indoor heat exchanger 12 and the third indoor heat exchanger 14.

  The refrigerant that has flowed into the first indoor heat exchanger 12 is liquefied by releasing heat to the air in the shared space 201 (by heating the air). The liquefied refrigerant is decompressed by the expansion device 17 to be in a gas-liquid two-phase state, and is gasified by absorbing heat from ambient air in the outdoor heat exchanger 11. The gasified refrigerant returns to the compressor 10. Further, the air in the common space 201 heated by the first indoor heat exchanger 12 is supplied to the air-conditioned spaces 202 and 203 via the duct 205 as shown by white arrows in FIG. Thereby, it becomes possible to heat each air-conditioned space 202,203. The air supplied to the air-conditioned spaces 202 and 203 is adjusted by the air volume variable devices 31 and 32 to an amount corresponding to the difference between the set temperature of the air-conditioned spaces 202 and 203 and the room temperature. In the present embodiment, the air volume varying device 33 is fully closed, and the supply of air from the shared space 201 to the air-conditioned space 204 that is individually air-conditioned is stopped. Thereby, it can suppress that the air conditioning capability of the whole building air conditioning is insufficient.

  On the other hand, the refrigerant flowing into the third indoor heat exchanger 14 is liquefied by releasing heat to the air in the conditioned space 204 (by heating the air). Moreover, the air heated by the 3rd indoor heat exchanger 14 returns to the air-conditioned space 204 again, as shown by the white arrow in FIG. Thereby, the air-conditioned space 204 can be heated separately from the air-conditioned spaces 202 and 203. The liquefied refrigerant is decompressed by the expansion device 17 to be in a gas-liquid two-phase state, and is gasified by absorbing heat from ambient air in the outdoor heat exchanger 11. The gasified refrigerant returns to the compressor 10.

  FIG. 5 is a flowchart showing control of the refrigerant flow switching device of the air-conditioning system according to the embodiment of the present invention.

  When the heating operation or the cooling operation is started in the air conditioning system 100 (step S1), in step S2, the control unit 52 of the control device 50 reads “the set temperature and temperature detection of the conditioned space 204 stored in the storage unit 51”. The comparison value that is the difference from the detected temperature of the device 36 (that is, the room temperature) is compared with the “threshold value x stored in the storage unit 51”. Here, in the case of the cooling operation, the indoor temperature-set temperature is a comparison value. In the case of heating operation, the set temperature−the room temperature is a comparative value. That is, step S2 in FIG. 5 illustrates the cooling operation. The threshold value x is, for example, a value between 1 ° C. and 2 ° C.

  When the comparison value is equal to or less than the threshold value x, the control unit 52 proceeds to step S3 and switches the refrigerant flow switching device 15 so that the flow path of the refrigerant flows to the second indoor heat exchanger 13. Thereafter, the control unit 52 proceeds to step S4, and the air volume is adjusted so that the amount of air supplied to each of the air-conditioned spaces 202 to 204 becomes an amount corresponding to the difference between the set temperature of each of the air-conditioned spaces 202 to 204 and the room temperature. The variable devices 31-33 are controlled and each air-conditioned space 202-204 is air-conditioned.

  On the other hand, when the comparison value is larger than the threshold value x, the control unit 52 proceeds to step S5 and switches the refrigerant flow switching device 15 so that the refrigerant flows into the third indoor heat exchanger 14. Thereafter, the control unit 52 proceeds to step S6, and the air volume is adjusted so that the amount of air supplied to each air-conditioned space 202, 203 becomes an amount corresponding to the difference between the set temperature of each air-conditioned space 202, 203 and the room temperature. The variable devices 31 to 33 are controlled, and the air-conditioned spaces 202 and 203 are air-conditioned. In addition, the control unit 52 closes the air volume varying device 33 and stops the supply of air from the shared space 201 to the air-conditioned space 204 that is individually air-conditioned.

  As described above, in the air conditioning system 100 according to the present embodiment, the individual air conditioning indoor unit 2 is installed by switching the refrigerant flow switching device 15 to the flow path through which the refrigerant flows to the third indoor heat exchanger 14. The air in the conditioned space 204 can be individually cooled or heated. For this reason, the air-conditioning system 100 according to the present embodiment can rapidly cool or rapidly heat the air-conditioned space 204 even when the air-conditioning load of the air-conditioned space 204 with a large load fluctuation increases. Therefore, the air-conditioning system 100 according to the present embodiment can maintain the room temperature of the air-conditioned space 204 near the set temperature even when the air-conditioning load in the air-conditioned space 204 becomes large. A decrease in comfort can be suppressed.

  Note that the refrigeration cycle circuit 20 shown in FIG. 2 is merely an example. For example, the refrigeration cycle circuit 20 may be configured as shown in FIG.

FIG. 6 is a refrigerant circuit diagram illustrating another example of the refrigeration cycle circuit of the air-conditioning system according to the embodiment of the present invention.
In the refrigeration cycle circuit 20 shown in FIG. 6, the compressor 10 is comprised by the 1st compressor 10a and the 2nd compressor 10b. Further, the four-way valve 16 is constituted by the first four-way valve 16a and the second four-way valve 16b. Moreover, the outdoor heat exchanger 11 is comprised by the 1st outdoor heat exchanger 11a and the 2nd outdoor heat exchanger 11b. Further, the first expansion device 17a and the second expansion device 17b constitute the expansion device 17. The refrigeration cycle circuit 20 includes a first refrigeration cycle circuit to which the first compressor 10a, the first four-way valve 16a, the first outdoor heat exchanger 11a, the first expansion device 17a, and the first indoor heat exchanger 12 are connected. 20a, second compressor 10b, second four-way valve 16b, second outdoor heat exchanger 11b, second expansion device 17b, second indoor heat exchanger 13, third indoor heat exchanger 14, and refrigerant flow switching device 15 is connected to a second refrigeration cycle circuit 20b.

  Each component of the refrigeration cycle circuit 20 shown in FIG. 6 is accommodated in the indoor air conditioning indoor unit 1, the individual air conditioning indoor unit 2, and the first outdoor unit 3a and the second outdoor unit 3b that constitute the outdoor unit 3. ing. Specifically, the indoor air conditioning indoor unit 1 houses a first indoor heat exchanger 12 and a second indoor heat exchanger 13. A third indoor heat exchanger 14 is accommodated in the individual air conditioning indoor unit 2. The first outdoor unit 3a accommodates a first compressor 10a, a first four-way valve 16a, a first outdoor heat exchanger 11a, and a first expansion device 17a. The second outdoor unit 3b houses a second compressor 10b, a second four-way valve 16b, a second outdoor heat exchanger 11b, and a second expansion device 17b. The installation position of the refrigerant flow switching device 15 is arbitrary. For example, the refrigerant flow switching device 15 may be stored in the indoor air conditioning indoor unit 1, may be stored in the individual air conditioning indoor unit 2, or may be stored in the second outdoor unit 3 b.

  In addition, when there is a time zone in which the air-conditioning space 204 is not required, such as when there is no person in the air-conditioned space 204 in which the individual air-conditioning indoor unit 2 is provided, as shown in FIG. May be. That is, the air conditioning system 100 may be operated only in the entire building air conditioning, and the air volume varying device 33 may be fully closed. The air conditioning system 100 according to the present embodiment can rapidly cool or rapidly heat the conditioned space 204 by the individual air conditioning indoor unit 2. For this reason, when an air conditioning load is generated in the air conditioned space 204, it can be handled by individual air conditioning. Therefore, when there is a time zone in which the air conditioned space 204 is not required, the air conditioning of the air conditioned space 204 can be stopped. Thus, by stopping the air conditioning of the conditioned space 204, the power consumption of the air conditioning system 100 can be reduced. The time zone in which the air conditioning space 204 does not require air conditioning is stored in the storage unit 51, for example.

  In the present embodiment, the air conditioning system 100 having only one individual air conditioning indoor unit 2 has been described. However, the air conditioning system 100 may include a plurality of individual air conditioning indoor units 2. Then, these individual air conditioning indoor units 2 may be provided in a plurality of air conditioning spaces. In this case, for example, as shown in FIG. 8, the third indoor heat exchanger 14 may be connected in parallel. In this case, an open / close device 19 that opens and closes the refrigerant flow path communicating with the third indoor heat exchangers 14 may be provided corresponding to each of the third indoor heat exchangers 14. When the air-conditioning load of the air-conditioned space in which any of the individual air-conditioning indoor units 2 is provided increases, the third indoor heat exchanger of the individual air-conditioning indoor unit 2 provided in the air-conditioned space in which the air-conditioning load has increased. Only 14 can be supplied with refrigerant.

  DESCRIPTION OF SYMBOLS 1 Indoor air conditioning indoor unit, 2 Individual air conditioning indoor unit, 3 Outdoor unit, 3a 1st outdoor unit, 3b 2nd outdoor unit, 10 compressor, 10a 1st compressor, 10b 2nd compressor, 11 Outdoor heat exchange 11a first outdoor heat exchanger, 11b second outdoor heat exchanger, 12 first indoor heat exchanger, 13 second indoor heat exchanger, 14 third indoor heat exchanger, 15 refrigerant flow switching device, 16 Four-way valve, 16a First four-way valve, 16b Second four-way valve, 17 Expansion device, 17a First expansion device, 17b Second expansion device, 18 Refrigerant piping, 19 Opening / closing device, 20 Refrigeration cycle circuit, 20a First refrigeration cycle circuit 20b Second refrigeration cycle circuit, 31-33 Air volume variable device, 34-36 Temperature detection device, 50 Control device, 51 Storage unit, 52 Control unit, 100 Air conditioning system, 201 Shared space, 20 To 204 air-conditioned space, 205 duct.

An air conditioning system according to the present invention includes a compressor, an outdoor heat exchanger, an expansion device, a first indoor heat exchanger, a second indoor heat exchanger, and a third indoor heat exchanger, and the first indoor heat exchange. A refrigeration cycle circuit that cools or heats air with a refrigerant supplied to the second indoor heat exchanger and the third indoor heat exchanger, the first indoor heat exchanger, and the second indoor heat exchanger A common space that includes a stored first indoor unit and a second indoor unit in which the third indoor heat exchanger is stored, and the first indoor unit communicates with a plurality of air-conditioned spaces through a ventilation path. The second indoor unit is provided in at least one of the plurality of air-conditioned spaces, and the first indoor heat exchanger, the second indoor heat exchanger, and the third room the heat exchanger is connected in parallel, the refrigeration cycle circuit further cold A refrigerant flow switching device for switching the flow path, the refrigerant flow switching device switches the flow path through which the refrigerant flows the the second flow path through which the refrigerant flows into the indoor heat exchanger or the third indoor heat exchanger Is .

Claims (6)

A compressor, an outdoor heat exchanger, an expansion device, a first indoor heat exchanger, a second indoor heat exchanger, and a third indoor heat exchanger, the first indoor heat exchanger, the second indoor heat exchanger And a refrigeration cycle circuit for cooling or heating air with the refrigerant supplied to the third indoor heat exchanger,
A first indoor unit in which the first indoor heat exchanger and the second indoor heat exchanger are stored;
A second indoor unit in which the third indoor heat exchanger is stored;
With
The first indoor unit is provided in a common space that communicates with a plurality of air-conditioned spaces through a ventilation path.
The second indoor unit is provided in at least one of the plurality of air-conditioned spaces,
The refrigeration cycle circuit further includes an air conditioner having a refrigerant flow switching device that switches a refrigerant flow path to a flow path through which refrigerant flows to the second indoor heat exchanger or a flow path through which refrigerant flows to the third indoor heat exchanger. system. A temperature detection device that is provided in an individual air-conditioned space that is the air-conditioned space in which the second indoor unit is provided, and that detects the temperature of the individual air-conditioned space;
A control unit having a storage unit that stores a set temperature of the individual air-conditioned space, and a control unit that controls switching of the refrigerant flow switching device;
With
The controller is
When the comparison value, which is the difference between the set temperature and the temperature detected by the temperature detection device, is equal to or less than a threshold value, the refrigerant flow switching device is controlled so that the refrigerant flows into the second indoor heat exchanger. ,
When the comparison value is larger than the threshold value, the refrigerant flow is such that the refrigerant flows into the third indoor heat exchanger provided in the individual conditioned space where the comparison value is larger than the threshold value. The air conditioning system according to claim 1, which is configured to control the path switching device. The compressor includes a first compressor and a second compressor,
The outdoor heat exchanger includes a first outdoor heat exchanger and a second outdoor heat exchanger,
The expansion device includes a first expansion device and a second expansion device,
The refrigeration cycle circuit is:
A first refrigeration cycle circuit to which the first compressor, the first outdoor heat exchanger, the first expansion device, and the first indoor heat exchanger are connected;
A second refrigeration cycle to which the second compressor, the second outdoor heat exchanger, the second expansion device, the second indoor heat exchanger, the third indoor heat exchanger, and the refrigerant flow switching device are connected. An air conditioning system according to claim 1 or 2, comprising a circuit.   The air volume variable device which is provided corresponding to each of a plurality of the air-conditioned spaces and adjusts the amount of air from the shared space supplied to the air-conditioned spaces. The air conditioning system described. In the state where the refrigerant flow switching device is switched to the flow path through which the refrigerant flows to the third indoor heat exchanger,
5. The air conditioning system according to claim 4, wherein supply of air from the shared space to the conditioned space is stopped by the air volume variable device corresponding to the conditioned space provided with the third indoor heat exchanger. . A time zone in which the air-conditioned space in which the second indoor unit is provided is not required,
The refrigerant flow switching device is switched so that the refrigerant flows into the second indoor heat exchanger.
The air conditioning system according to claim 4 or 5, wherein the air volume variable device corresponding to the air-conditioned space is fully closed to stop the supply of air from the shared space to the air-conditioned space.

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