Air conditioning system, method of controlling refrigeration cycle device, and program

Abstract

Provided is an air conditioning system in which a refrigeration cycle device performs a control taking into consideration a circulation effect brought about by a blower.　A refrigeration cycle device as in the present disclosure is provided with: a refrigeration cycle device comprising a compressor for causing a drive shaft to rotate and compressing a refrigerant, an outdoor heat exchanger, a decompression device, an indoor heat exchanger, an indoor blowing device for causing an indoor fan to rotate and sending indoor air to the indoor heat exchanger, and a refrigerant piping connecting the respective apparatuses so that the refrigerant circulates; and a control unit configured so that if the refrigeration cycle device and a blower are driven simultaneously and a total consumed power that is the total value of power consumed by the refrigeration cycle device and power consumed by the blower is greater than a predetermined target consumed power, the control unit controls the rotational speed of the indoor fan or the rotational speed of the drive shaft of the compressor so as to be slower than if the total consumed power is at or below the target consumed power.

Description

Air conditioning system, refrigeration cycle device control method and program

[0001] The present disclosure relates to an air conditioning system, a control method for a refrigeration cycle device, and a program.

[0002] When ventilation and temperature control are required simultaneously in a building, the blower and refrigeration cycle device are operated simultaneously. In the control system disclosed in Patent Document 1, the blower is used to assist the flow of blown air set in an indoor unit that air-conditions the room with air blown from the blower, and when the indoor temperature has not reached the target temperature of the indoor unit, the volume of air blown from the blower is increased or decreased depending on the magnitude of the difference between the indoor temperature and the target temperature.

[0003] Japanese Patent Application Laid-Open No. 2021-173513

[0004] It is known that operating a blower causes gentle air convection in a room, creating a circulation effect and improving heating and cooling efficiency. Therefore, the control system described in Patent Document 1 can control the blower while taking the circulation effect into consideration. However, the control system described in Patent Document 1 does not control the refrigeration cycle device while taking the circulation effect into consideration, which has the problem of being unable to perform efficient control.

[0005] In order to solve the above-mentioned problems, the air conditioning system of the present disclosure includes a refrigeration cycle device having a compressor that rotates a drive shaft to compress a refrigerant, an outdoor heat exchanger that exchanges heat between the refrigerant and the air outside the building, a pressure reducing device that reduces the pressure of the refrigerant, an indoor heat exchanger that exchanges heat between the air inside the building and the outdoor air and is equipped with a blower, an indoor blower that rotates the indoor fan to send indoor air to the indoor heat exchanger, and refrigerant piping that connects the compressor, the outdoor heat exchanger, the pressure reducing device, and the indoor heat exchanger so that refrigerant circulates between each device, and a control unit that simultaneously drives the refrigeration cycle device and the blower, and that, when total power consumption, which is the sum of the power consumption of the refrigeration cycle device and the power consumption of the blower, is greater than a predetermined target power consumption, slows the rotation speed of the indoor fan or slows the rotation speed of the compressor's drive shaft compared to when the total power consumption is equal to or less than the target power consumption.

[0006] In addition, the control method and program for a refrigeration cycle device disclosed herein include a refrigeration cycle device that includes a compressor that rotates a drive shaft to compress a refrigerant, an outdoor heat exchanger that discharges heat from inside a building to the outside, a pressure reducing device that reduces the pressure of the refrigerant, an indoor heat exchanger that exchanges heat between the indoor air and the outdoor air, an indoor blower that rotates an indoor fan to send indoor air to the indoor heat exchanger, and refrigerant piping that connects the compressor, the outdoor heat exchanger, the pressure reducing device, and the indoor heat exchanger so that the refrigerant circulates between each of the devices, and when the refrigeration cycle device and the blower installed indoors are both operating and the total power consumption, which is the sum of the power consumption of the refrigeration cycle device and the power consumption of the blower, is greater than a predetermined target power consumption, the control unit slows the rotation speed of the indoor fan or slows the rotation speed of the compressor drive shaft compared to when the total power consumption is equal to or less than the target power consumption.

[0007] According to the air conditioning system, refrigeration cycle device control method and program disclosed herein, when a blower and a refrigeration cycle device are operated simultaneously, the refrigeration cycle device can be controlled taking into account the circulation effect produced by the blower, thereby achieving the effect of effective control.

[0008] 1 is a schematic diagram of an air conditioning system according to embodiment 1. FIG. 2 is a refrigerant circuit diagram showing an overview of a refrigeration cycle apparatus according to embodiment 1. FIG. 3 is a schematic diagram showing the configuration of a blower according to embodiment 1. FIG. 4 is a block diagram showing the hardware configuration of an air conditioning system according to embodiment 1. FIG. 5 is a block diagram showing the functional configuration of an air conditioning system according to embodiment 1. FIG. 6 is a flowchart showing processing performed by a control device of an air conditioning system according to embodiment 1. FIG. 7 is a flowchart showing processing performed by a control device of an air conditioning system according to embodiment 2. FIG. 8 is a refrigerant circuit diagram showing an overview of a refrigeration cycle apparatus according to embodiment 3. FIG. 9 is a refrigerant circuit diagram showing an overview of a refrigeration cycle apparatus according to embodiment 4. FIG. 10 is a flowchart showing processing performed by a control device of an air conditioning system according to embodiment 4 when the refrigeration cycle apparatus performs cooling operation. FIG. 11 is a flowchart showing processing performed by a control device of an air conditioning system according to embodiment 4 when the refrigeration cycle apparatus performs heating operation. FIG. 12 is a flowchart showing processing performed by a control device of an air conditioning system according to embodiment 5.

[0009] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Note that the present disclosure is not limited to the following embodiments, and modifications or omissions may be made without departing from the spirit of the present disclosure.

[0010] Embodiment 1. Fig. 1 is a schematic diagram of an air conditioning system 100 according to embodiment 1 of the present disclosure. An overview of the air conditioning system 100 will be described using Fig. 1. The air conditioning system 100 includes a refrigeration cycle device 10, a blower 20, a temperature detection device 30, a power consumption acquisition device 40, a power consumption acquisition device 50, and a control device 60. Furthermore, a building 400 and a network 500 shown in Fig. 1 are shown for the purpose of explanation and are not included in the air conditioning system 100.

[0011] The refrigeration cycle apparatus 10, the blower 20, the temperature detection device 30, the power consumption acquisition device 40, the power consumption acquisition device 50, and the control device 60 are connected via a network 500. The connection to the network 500 can be made via, for example, a LAN, a WAN, the Internet, Bluetooth (registered trademark), a dedicated circuit, or infrared communication.

[0012] The refrigeration cycle apparatus 10 has an indoor unit 11 installed indoors in the building 400 and an outdoor unit 12 installed outdoors in the building 400. The devices constituting the refrigeration cycle apparatus 10 are connected to each other by refrigerant piping 301, which will be described later, and a refrigerant circuit through which a refrigerant circulates is formed in the refrigeration cycle apparatus 10. In the first embodiment, the refrigeration cycle apparatus 10 performs cooling operation. The specific configuration of the refrigeration cycle apparatus 10 will be described later.

[0013] The blower 20 is installed on the floor of the room of the building 400 and blows air into the room. More specifically, the blower 20 is a circulation blower that circulates the air inside the building 400. The specific configuration of the blower 20 will be described later.

[0014] The cold air blown out from the indoor unit 11 has a higher density than the air inside the building 400, and therefore tends to accumulate at the bottom of the building 400. Therefore, by installing the blower 20, which is a circulation blower, on the floor to circulate the air inside the building 400, the air inside the building can be circulated evenly.

[0015] The temperature detecting device 30 is installed in a room of the building 400 and detects the temperature inside the room. Hereinafter, the temperature detected by the temperature detecting device 30 will be referred to as the measured temperature. Specifically, the temperature detecting device 30 detects the measured temperature using a temperature sensor.

[0016] The power consumption acquisition device 40 acquires the power consumption of the refrigeration cycle apparatus 10. Specifically, the power consumption acquisition device 40 is a power consumption meter that is connected to the power cord of the refrigeration cycle apparatus 10 and acquires the power consumption of the refrigeration cycle apparatus 10 during a predetermined measurement period.

[0017] The power consumption acquisition device 50 acquires the power consumption of the blower 20. Specifically, the power consumption acquisition device 50 is a power consumption meter that is connected to the power cord of the blower 20 and acquires the power consumption of the blower 20 during a predetermined measurement period.

[0018] The control device 60 controls the refrigeration cycle device 10. More specifically, the control device 60 generates a control command for the refrigeration cycle device 10 from a total power consumption value, which is the sum of the power consumption of the refrigeration cycle device 10 acquired by the power consumption acquisition device 40 and the power consumption of the blower 20 acquired by the power consumption acquisition device 50, and transmits the generated control command to the refrigeration cycle device 10. In the air conditioning system 100 according to the first embodiment, when the control device 60 determines that the refrigeration cycle device 10 and the blower 20 are simultaneously operating and the value of the total power consumption is greater than a predetermined target power consumption, the control device 60 slows the rotation speed of the indoor fan 120 of the refrigeration cycle device 10, which will be described later, compared to when the control device 60 determines that the total power consumption is equal to or less than the target power consumption.

[0019] With this configuration, in the air conditioning system 100 according to Embodiment 1, when the blower and the refrigeration cycle device are operated simultaneously, the refrigeration cycle device can perform control that takes into account the circulation effect produced by the blower, thereby achieving the effect of effective control. This is because, when the total power consumption is greater than the target power consumption, the air conditioning system 100 as a whole is considered to have sufficient ability to regulate the indoor temperature of the building 400 even if the rotation speed of the indoor fan 120 of the refrigeration cycle device 10 is slowed. Furthermore, by slowing the rotation speed of the indoor fan 120, the power consumption of the indoor fan motor 121 can be reduced, and therefore the power consumption of the refrigeration cycle device 10 can be reduced.

[0020] Furthermore, when the control device 60 determines that the total power consumption is greater than the target power consumption and reduces the rotation speed of the indoor fan 120, if the temperature difference value is greater than a predetermined allowable temperature difference, the control device 60 increases the rotation speed of the indoor fan 120 compared to when the temperature difference value is equal to or less than the allowable temperature difference. Note that the temperature difference value is the absolute value of the difference between the measured temperature inside the building 400 after a predetermined detection time has elapsed and the indoor target temperature set for the refrigeration cycle device 10 by the user.

[0021] This configuration of the air conditioning system 100 according to the first embodiment provides the effect of preventing the ability of the air conditioning system 100 as a whole to adjust the temperature of the room of the building 400 from decreasing too much. This is because if the temperature difference value is larger than the allowable temperature difference when the rotation speed of the indoor fan 120 is slowed, it is highly likely that the ability of the air conditioning system 100 to adjust the temperature has decreased too much. In other words, in the refrigeration cycle apparatus 10 according to the first embodiment that is performing cooling operation, it can be estimated that the measured temperature of the room of the building 400 is higher than the sum of the target temperature of the room and the allowable temperature difference. The specific configuration of the control device 60 will be described later.

[0022] 2 is a refrigerant circuit diagram showing an overview of the refrigeration cycle apparatus 10 according to Embodiment 1. A specific configuration of the refrigeration cycle apparatus 10 will be described with reference to FIG.

[0023] As shown in Fig. 2, the refrigeration cycle apparatus 10 includes an indoor unit 11 and an outdoor unit 12. In Fig. 2, solid arrows indicate the flow of refrigerant during cooling operation in the refrigeration cycle apparatus 10. As shown in Fig. 2, refrigerant piping 301 connects the compressor 112, the outdoor heat exchanger 114, the pressure reducing device 113, and the indoor heat exchanger 110 so that the refrigerant circulates among the respective devices.

[0024] The indoor unit 11 includes an indoor heat exchanger 110 and an indoor blower 111. The indoor heat exchanger 110 exchanges heat between the indoor air and the outdoor air of the building 400. The indoor heat exchanger 110 also functions as an evaporator.

[0025] The indoor blower 111 blows indoor air to the indoor heat exchanger 110. The indoor blower 111 includes an indoor fan 120 and an indoor fan motor 121. The indoor fan 120 rotates to draw in and blow out indoor air in the building 400 around the indoor fan 120, thereby blowing air to the indoor heat exchanger 110. The indoor fan motor 121 drives the indoor fan 120 using power supplied from a power cord.

[0026] The outdoor unit 12 includes a compressor 112, a pressure reducing device 113, an outdoor heat exchanger 114, and an outdoor blower 115. The outdoor unit 12 is formed by communicating each component through refrigerant piping 301. The compressor 112 compresses and discharges the refrigerant that has flowed in when a compressor motor built into the compressor rotates its drive shaft. The pressure reducing device 113 is a device that reduces the pressure of the refrigerant, and is specifically an expansion valve. The outdoor heat exchanger 114 exchanges heat between the refrigerant and the air outside the building 400. The outdoor heat exchanger 114 also functions as a condenser.

[0027] The outdoor blower 115 blows outdoor air to the outdoor heat exchanger 114. The outdoor blower 115 includes an outdoor fan 122 and an outdoor fan motor 123. The outdoor fan 122 rotates to draw in and blow out outdoor air from the building 400 around the outdoor fan 122, thereby blowing air to the outdoor heat exchanger 114. The outdoor fan motor 123 drives the outdoor fan 122 using power supplied from a power cord.

[0028] The flow of refrigerant in the refrigeration cycle apparatus 10 will be described using Figure 2. High-pressure gas refrigerant discharged from the compressor 112 flows into the outdoor heat exchanger 114. The high-pressure gas refrigerant that flows into the outdoor heat exchanger 114 is condensed and becomes liquid refrigerant. The liquid refrigerant that flows out of the outdoor heat exchanger 114 flows into the pressure reducing device 113. The liquid refrigerant that flows into the pressure reducing device 113 is decompressed and expands, becoming low-pressure two-phase gas-liquid refrigerant. The low-pressure two-phase gas-liquid refrigerant that flows out of the pressure reducing device 113 flows into the indoor unit 11 and then into the indoor heat exchanger 110. The low-pressure two-phase gas-liquid refrigerant that flows into the indoor heat exchanger 110 evaporates and becomes low-pressure gas refrigerant. The low-pressure gas refrigerant that flows out of the indoor heat exchanger 110 flows into the compressor 112. By circulating the refrigerant in this manner, the indoor air is cooled by the low-pressure refrigerant in a gas-liquid two-phase state in the indoor heat exchanger 110 .

[0029] 3 is a schematic diagram showing the configuration of blower 20 according to embodiment 1. The specific configuration of blower 20 will be described with reference to FIG.

[0030] As shown in FIG. 3 , the blower 20 includes a blower motor 201 , a blower fan 202 , a fan guard 203 , and a support portion 204 .

[0031] Blower motor 201 uses power supplied from a power cord to drive blower fan 202. Blower fan 202 is a plurality of fans attached to blower motor 201. Blower fan 202 rotates, sucking in air around blower fan 202 and blowing it.

[0032] The fan guard 203 is provided to protect the blower fan 202. The fan guard 203 allows air to pass through while preventing the user's hands from touching the blower fan 202. The fan guard is made of, for example, metal or plastic. The support portion 204 supports the blower motor 201, the blower fan 202, and the fan guard 203.

[0033] Fig. 4 is a block diagram showing the hardware configuration of the air conditioning system 100 according to Embodiment 1. Next, the hardware configuration of the air conditioning system 100 will be described with reference to Fig. 4 .

[0034] The refrigeration cycle device 10 has a hardware interface 15 , components 16 , and an operation device 17 .

[0035] The hardware interface 15 receives, wirelessly or via a wired connection, a signal including information indicating a control command for the refrigeration cycle apparatus 10 from the hardware interface 65 of the control device 60. More specifically, the hardware interface 15 receives a signal including information indicating a command to change the rotation speed of the indoor fan 120. The hardware interface 15 also transmits, wirelessly or via a wired connection, to the hardware interface 65 of the control device 60, a signal including information indicating a target indoor temperature of the building 400 obtained by the operation device 17.

[0036] The components 16 are components that make up the refrigeration cycle apparatus 10. More specifically, the components 16 are an indoor heat exchanger 110, an indoor blower 111, a compressor 112, a pressure reducing device 113, an outdoor heat exchanger 114, and an outdoor blower 115.

[0037] The operation device 17 is a device operated by a user. The user operates the operation device 17 to perform various settings of the refrigeration cycle apparatus 10. In particular, the user operates the operation device 17 to set a target temperature for the room of the building 400.

[0038] The temperature detection device 30 has a temperature sensor 34 and a hardware interface 35. The temperature sensor 34 detects the measured temperature inside the building 400. The hardware interface 35 transmits a signal including information indicating the measured temperature inside the building 400 detected by the temperature sensor 34 to a hardware interface 65 of the control device 60 wirelessly or via a wired connection.

[0039] The power consumption acquisition device 40 has a power consumption meter 44 and a hardware interface 45. The power consumption meter 44 acquires the power consumption of the refrigeration cycle apparatus 10 during a measurement period. The hardware interface 45 transmits a signal including information indicating the power consumption of the refrigeration cycle apparatus 10 acquired by the power consumption meter 44 to a hardware interface 65 of the control device 60 wirelessly or via a wired connection.

[0040] The power consumption acquisition device 50 has a power usage meter 54 and a hardware interface 55. The power usage meter 54 acquires the power consumption of the fan 20 during a measurement period. The hardware interface 55 transmits a signal including information indicating the power consumption of the fan 20 acquired by the power usage meter 54 to a hardware interface 65 of the control device 60 via a wireless or wired connection.

[0041] The control device 60 includes a hardware interface 65 , a processor 66 , a memory 67 , and a storage 68 .

[0042] The hardware interface 65 receives, wirelessly or via a wired connection, a signal including information indicating a target temperature for the indoor space of the building 400 from the hardware interface 15 of the refrigeration cycle apparatus 10. The hardware interface 65 also receives, wirelessly or via a wired connection, a signal including information indicating a measured temperature for the indoor space of the building 400 from the hardware interface 35 of the temperature detection device 30. The hardware interface 65 also receives, wirelessly or via a wired connection, a signal including information indicating the power consumption of the refrigeration cycle apparatus 10 from the hardware interface 45 of the power consumption acquisition device 40. The hardware interface 65 also receives information indicating the power consumption of the blower 20 from the hardware interface 55 of the power consumption acquisition device 50. The hardware interface 65 also transmits, wirelessly or via a wired connection, a signal including information indicating a control command for the refrigeration cycle apparatus 10 to the hardware interface 15 of the refrigeration cycle apparatus 10.

[0043] The processor 66 executes a program stored in the memory 67. Specifically, the processor 66 changes the rotation speed of the indoor fan 120 of the refrigeration cycle apparatus 10. The processor 66 is, for example, a CPU (Central Processing Unit).

[0044] The memory 67 stores programs executed by the processor 66. The memory 67 is also used as a work area for the processor 66. The memory 67 may be a volatile memory such as a random access memory (RAM), a non-volatile memory such as a read only memory (ROM), or both a volatile memory and a non-volatile memory.

[0045] The storage 68 stores the target power consumption, the target indoor temperature, the allowable temperature difference, the reference power value, and the detection time. The target power consumption is a predetermined value as a target value when the power consumptions of the refrigeration cycle apparatus 10 and the blower 20 are combined. The target indoor temperature is the indoor temperature setting of the building 400 that the user sets for the refrigeration cycle apparatus 10. The allowable temperature difference is a value determined as an allowable difference between the measured temperature detected by the temperature detection device 30 and the target indoor temperature. The reference power value is a value determined as a reference for operating the blower 20. The detection time is the time until the temperature detection device 30 performs temperature detection when it is determined that the total power consumption is greater than the target power consumption.

[0046] 5 is a block diagram showing the functional configuration of the air conditioning system 100 according to Embodiment 1. The functional configuration of the air conditioning system 100 will be described using FIG.

[0047] The refrigeration cycle device 10 includes an air conditioning operation unit 101 , a transmitting / receiving unit 102 , and a target temperature acquisition unit 103 .

[0048] The air conditioning operation unit 101 performs cooling operation to lower the temperature inside the building 400 by sending cool air into the room. The air conditioning operation unit 101 is realized by the components 16 of the refrigeration cycle device 10.

[0049] The transceiver 102 receives a signal including information indicating a control command for the refrigeration cycle apparatus 10 from the transceiver 602. More specifically, the transceiver 102 receives a signal including information indicating a command to change the rotation speed of the indoor fan 120. The transceiver 102 also transmits the indoor target temperature acquired by a target temperature acquisition unit 103 (described later) to the transceiver 602 of the control device 60. The transceiver 102 is realized by the hardware interface 15 of the refrigeration cycle apparatus 10.

[0050] The target temperature acquisition unit 103 acquires the target temperature for the room of the building 400 set by the user. The target temperature acquisition unit 103 is realized by the operation device 17 of the refrigeration cycle apparatus 10.

[0051] The temperature detecting device 30 includes a temperature detecting unit 311 and a transmitting unit 312. The temperature detecting unit 311 detects the measured temperature inside the building 400. The temperature detecting unit 311 is realized by the temperature sensor 34 of the temperature detecting device 30.

[0052] The transmitting unit 312 transmits the measured temperature inside the building 400 detected by the temperature detecting unit 311 to the transmitting / receiving unit 602. The transmitting unit 312 is realized by the hardware interface 35 of the temperature detecting device 30.

[0053] The power consumption acquisition device 40 includes a power consumption acquisition unit 401 and a transmission unit 402. The power consumption acquisition unit 401 acquires the power consumption of the refrigeration cycle device 10 during a measurement period from the air conditioning operation unit 101 of the refrigeration cycle device 10. The power consumption acquisition unit 401 is realized by the power usage meter 44 of the power consumption acquisition device 40.

[0054] The transmission unit 402 transmits the power consumption of the refrigeration cycle apparatus 10 during the measurement period, acquired by the power consumption acquisition unit 401, to the transmission / reception unit 602 of the control device 60. The transmission unit 402 is realized by the hardware interface 45 of the power consumption acquisition device 40.

[0055] The power consumption acquisition device 50 includes a power consumption acquisition unit 501 and a transmission unit 502. The power consumption acquisition unit 501 acquires the power consumption of the fan 20 during a measurement period from the fan 20. The power consumption acquisition unit 501 is realized by the power usage meter 54 of the power consumption acquisition device 50.

[0056] The transmission unit 502 transmits the power consumption of the fan 20 during the measurement period acquired by the power consumption acquisition unit 501 to the transmission / reception unit 602 of the control device 60. The transmission unit 502 is realized by the hardware interface 55 of the power consumption acquisition device 50.

[0057] The control device 60 includes a transmitter / receiver 602 , a drive determination unit 603 , a total power consumption calculation unit 604 , a memory unit 605 , a power determination unit 606 , a temperature difference value calculation unit 607 , a temperature determination unit 608 , and a control command generation unit 609 .

[0058] The transceiver unit 602 transmits a signal from the control device 60 or receives a signal to the control device 60. More specifically, the transceiver unit 602 transmits a signal including information indicating a control command for the refrigeration cycle device 10 to the transceiver unit 102 of the refrigeration cycle device 10. The transceiver unit 602 also receives a signal including information indicating a target temperature for the indoor space of the building 400 from the transceiver unit 102 of the refrigeration cycle device 10. The transceiver unit 602 also receives a measured temperature for the indoor space of the building 400 detected by the temperature detection unit 311 from the transmission unit 312 of the temperature detection device 30. The transceiver unit 602 also receives the power consumption of the refrigeration cycle device 10 during the measurement period, which is acquired by the power consumption acquisition unit 401, from the transmission unit 402 of the power consumption acquisition device 40. The transceiver unit 602 also receives the power consumption of the blower 20 during the measurement period, which is acquired by the power consumption acquisition unit 501, from the transmission unit 502 of the power consumption acquisition device 50. The transmitting / receiving unit 602 is realized by the hardware interface 65 of the control device 60 .

[0059] The drive determination unit 603 determines whether the blower 20 is driven when the refrigeration cycle apparatus 10 is driven. That is, the drive determination unit 603 determines whether the refrigeration cycle apparatus 10 and the blower 20 are driven simultaneously. More specifically, when the refrigeration cycle apparatus 10 is driven, the drive determination unit 603 determines whether the blower 20 is driven based on the power consumption of the blower 20 received by the transceiver unit 602. More specifically, the drive determination unit 603 determines whether the power consumption of the blower 20 is power consumption due to the operation of the blower or standby power. Standby power is generally a very small value. Therefore, if the power consumption of the blower 20 is greater than the reference power value stored in the storage unit 605, the drive determination unit 603 determines that the blower 20 is driven. Furthermore, if the power consumption of the blower 20 is equal to or less than the reference power value, the drive determination unit 603 determines that the blower 20 is not driven. The drive determination unit 603 is realized by the processor 66 and the memory 67 of the control device 60 .

[0060] When the drive determination unit 603 determines that the refrigeration cycle apparatus 10 and the blower 20 are driven simultaneously, the total power consumption calculation unit 604 calculates the total power consumption, which is the sum of the power consumption of the refrigeration cycle apparatus 10 and the power consumption of the blower 20, from the power consumption of the refrigeration cycle apparatus 10 and the power consumption of the blower 20 received by the transceiver unit 602. The total power consumption calculation unit 604 is realized by the processor 66 and memory of the control device 60.

[0061] The storage unit 605 stores the target power consumption, the target indoor temperature, the allowable temperature difference, the reference power value, and the detection time. The storage unit 605 is realized by storing information in the storage 68 of the control device 60.

[0062] The power determining unit 606 determines whether the total power consumption calculated by the total power consumption calculating unit 604 is greater than the target power consumption stored in the storage unit 605. The power determining unit 606 is realized by the processor 66 and memory of the control device 60.

[0063] The temperature difference value calculation unit 607 calculates a temperature difference value from the measured indoor temperature of the building 400 received by the transceiver unit 602 and the indoor target temperature stored in the memory unit 605. The temperature difference value is the absolute value of the difference between the measured indoor temperature of the building 400 and the target temperature. The temperature difference value calculation unit 607 is realized by the processor 66 and memory of the control device 60.

[0064] When it is determined that the total power consumption is greater than the target power consumption, the temperature determination unit 608 determines whether the temperature difference value calculated by the temperature difference value calculation unit 607 is greater than the allowable temperature difference stored in the storage unit 605 after the predetermined detection time stored in the storage unit 605 has elapsed. The temperature determination unit 608 is realized by the processor 66 and memory of the control device 60.

[0065] The control command generation unit 609 generates a control command for the refrigeration cycle apparatus 10. More specifically, the control command generation unit 609 changes the rotation speed of the indoor fan 120 of the refrigeration cycle apparatus 10. When the power determination unit 606 determines that the total power consumption is greater than the target power consumption, the control command generation unit 609 slows the rotation speed of the indoor fan 120 compared to when the power determination unit 606 determines that the total power consumption is equal to or less than the target power consumption.

[0066] Furthermore, when the control command generation unit 609 determines that the total power consumption is greater than the target power consumption and slows down the rotation speed of the indoor fan 120, if the temperature determination unit 608 determines that the temperature difference value is greater than the allowable temperature difference, the control command generation unit 609 increases the rotation speed of the indoor fan compared to when the temperature determination unit 608 determines that the temperature difference value is equal to or less than the allowable temperature difference.

[0067] Fig. 6 is a flowchart showing the processing performed by the control device 60 of the air conditioning system 100 according to Embodiment 1. The processing performed by the control device 60 will be described using Fig. 6 .

[0068] Step S101 is processed when the refrigeration cycle apparatus 10 is driven or at regular time intervals after the refrigeration cycle apparatus 10 is driven. In step S101, the transceiver unit 602 receives a signal including information indicating the power consumption of the refrigeration cycle apparatus 10 from the transmitter 402 and receives a signal including information indicating the power consumption of the blower 20 from the transmitter 502. In step S101, when the transceiver unit 602 receives a signal including information indicating the power consumption of the refrigeration cycle apparatus 10 and a signal including information indicating the power consumption of the blower 20, the processing ends.

[0069] Step S102 is performed after the processing of step S101. In step S102, the drive determination unit 603 determines whether the fan 20 is driven. More specifically, if the power consumption of the fan 20 acquired in step S101 is greater than the reference power value stored in the storage unit 605, the drive determination unit 603 determines that the fan 20 is driven. Furthermore, if the power consumption of the fan 20 is equal to or less than the reference power value, the drive determination unit 603 determines that the fan 20 is not driven. In step S102, when the drive determination unit 603 determines whether the condition is satisfied, the processing ends.

[0070] Step S103 is performed when it is determined in step S102 that the blower 20 is operating (Yes in step S102). In step S103, the total power consumption calculation unit 604 calculates the total power consumption. More specifically, the total power consumption calculation unit 604 calculates the total power consumption by adding the power consumption of the refrigeration cycle apparatus 10 and the power consumption of the blower 20 acquired in step S101. In step S103, the total power consumption calculation unit 604 calculates the total power consumption, and then the process ends.

[0071] In step S102, if it is determined that the blower 20 is not driven (step S102, No), the control device 60 ends the process.

[0072] Step S104 is performed after step S103. In step S104, the power determining unit 606 determines whether the total power consumption calculated in step S103 is greater than the target power consumption stored in the storage unit 605. In step S104, the power determining unit 606 determines whether the condition is satisfied, and then the process ends.

[0073] Step S105 is performed when it is determined in step S104 that the total power consumption is greater than the target power consumption (step S104, Yes). In step S105, the control command generation unit 609 generates a control command to slow the rotation speed of the indoor fan 120 of the refrigeration cycle apparatus 10 below the rotation speed of the indoor fan 120 in step S104. For example, the control command generation unit 609 reduces the rotation speed of the indoor fan 120 by half. In step S105, when the control command generation unit 609 generates a control command to slow the rotation speed of the indoor fan 120, the process ends.

[0074] If it is determined in step S104 that the total power consumption is equal to or less than the target power (step S104, No), the control device 60 ends the process.

[0075] Step S106 is performed after the process of step S105. In step S106, the transceiver 602 transmits the command generated in step S105 to the transceiver 102 of the refrigeration cycle apparatus 10 to slow down the rotation speed of the indoor fan 120 below the rotation speed of the indoor fan 120 in step S104. When the transceiver 602 transmits the command to slow down the rotation speed of the indoor fan 120, the process of step S106 ends.

[0076] Step S108 is performed after the detection time stored in the memory unit 605 has elapsed since step S106 ended (after step S107 ended). In step S108, the transmitting / receiving unit 602 acquires the measured temperature inside the building 400 from the transmitting unit 312. When the transmitting / receiving unit 602 acquires the measured temperature inside the building 400, the processing in step S108 ends.

[0077] Step S109 is performed after step S108. In step S109, the temperature difference value calculation unit 607 calculates a temperature difference value, which is the absolute value of the difference between the measured temperature inside the building 400 acquired in step S108 and the target temperature inside the building 400 acquired from the target temperature acquisition unit 103 and stored in the memory unit 605. In step S109, the temperature difference value calculation unit 607 calculates the temperature difference value, and the process ends.

[0078] Step S110 is performed after step S109. In step S110, the temperature determination unit 608 determines whether the temperature difference value calculated in step S109 is greater than the allowable temperature difference stored in the storage unit 605. In step S110, the temperature determination unit 608 determines whether the condition is satisfied, and then the process ends.

[0079] Step S111 is performed when it is determined in step S110 that the temperature difference value is greater than the allowable temperature difference (step S110, Yes). In step S111, the control command generation unit 609 generates a control command to increase the rotation speed of the indoor fan 120 of the refrigeration cycle apparatus 10 beyond the rotation speed of the indoor fan 120 in step S105. For example, the control command generation unit 609 increases the rotation speed of the indoor fan 120 by two times compared to the rotation speed of the indoor fan 120 in step S105. In step S111, the control command generation unit 609 generates a control command to increase the rotation speed of the indoor fan 120, and then the process ends.

[0080] In step S110, if it is determined that the temperature difference value is equal to or smaller than the allowable temperature difference (step S110, No), the control device 60 ends the process.

[0081] Step S112 is performed after the process of step S111. In step S112, the transceiver 602 transmits the command generated in step S111 to the transceiver 102 of the refrigeration cycle apparatus 10 to increase the rotation speed of the indoor fan 120 beyond the rotation speed of the indoor fan 120 in step S111. The process of step S112 ends when the transceiver 602 transmits the command to increase the rotation speed of the indoor fan 120. Furthermore, when step S112 ends, the control device 60 ends the process.

[0082] As described above, the air conditioning system 100 according to the first embodiment includes the compressor 112 that rotates a drive shaft to compress a refrigerant, the outdoor heat exchanger 114 that exchanges heat between the refrigerant and the air outside the building 400, the pressure reducing device 113 that reduces the pressure of the refrigerant, the indoor heat exchanger 110 that exchanges heat between the air inside the building 400 and the air outside the building 400 and that is provided with the blower 20, the indoor blower 111 that rotates the indoor fan 120 to send the air inside the building to the indoor heat exchanger 110, and the compressor 112, the outdoor heat exchanger 114, the pressure reducing device 113, and the indoor heat exchanger 110. The air conditioning system 100 according to the first embodiment includes a refrigeration cycle device 10 having a refrigerant pipe 301 connecting the indoor fan 120 and the blower 20 so that the refrigerant circulates between the devices, and a control unit (corresponding to the control device 60) that simultaneously drives the refrigeration cycle device 10 and the blower 20 and, when the total power consumption, which is the sum of the power consumption of the refrigeration cycle device 10 and the power consumption of the blower 20, is greater than a predetermined target power consumption, slows the rotation speed of the indoor fan 120 or slows the rotation speed of the drive shaft of the compressor 112 compared to when the total power consumption is equal to or less than the target power consumption. With this configuration, when the blower and the refrigeration cycle device are operated simultaneously, the refrigeration cycle device can perform control that takes into account the circulation effect generated by the blower, thereby achieving the effect of effective control.

[0083] The control method and program for the refrigeration cycle apparatus 10 according to the first embodiment also include a compressor 112 that rotates a drive shaft to compress a refrigerant, an outdoor heat exchanger 114 that discharges heat from inside the building 400 to the outside, a pressure reducing device 113 that reduces the pressure of the refrigerant, an indoor heat exchanger 110 that exchanges heat between the indoor air and the outdoor air, an indoor air blower 111 that rotates an indoor fan 120 to send the indoor air to the indoor heat exchanger 110, and a control method and program for controlling the refrigeration cycle apparatus 10 according to the first embodiment. and a refrigerant pipe 301 connected so that the refrigerant circulates through the refrigeration cycle apparatus 10, wherein a control unit (corresponding to a control device 60) slows down the rotation speed of the indoor fan 120 or the rotation speed of the drive shaft of the compressor 112 when both the refrigeration cycle apparatus 10 and the blower 20 installed indoors are driven and when the total power consumption, which is the sum of the power consumption of the refrigeration cycle apparatus 10 and the power consumption of the blower 20, is greater than a predetermined target power consumption, compared to when the total power consumption is equal to or less than the target power consumption. With this configuration, the control method and program for the refrigeration cycle apparatus 10 according to the first embodiment can control the refrigeration cycle apparatus in consideration of the circulation effect generated by the blower when the blower and the refrigeration cycle apparatus are operated simultaneously, thereby achieving the effect of effective control.

[0084] Furthermore, as an additional configuration, the air conditioning system 100 according to the first embodiment has the following configuration: when the total power consumption is greater than the target power consumption, after a predetermined detection time has elapsed, if the temperature difference value, which is the absolute value of the difference between the indoor target temperature and the indoor temperature, is greater than a predetermined allowable temperature difference, the control unit (corresponding to the control device 60) increases the rotation speed of the indoor fan 120 or increases the rotation speed of the drive shaft of the compressor 112 compared to when the temperature difference value is equal to or less than the allowable temperature difference. With this additional configuration, the air conditioning system 100 according to the first embodiment has the effect of preventing an excessive decrease in the ability of the air conditioning system 100 as a whole to regulate the temperature inside the building 400.

[0085] Furthermore, the control method and program for the refrigeration cycle apparatus 10 according to the first embodiment additionally include a configuration in which, when the total power consumption is greater than the target power consumption, after a predetermined detection time has elapsed, the control unit (corresponding to the transceiver unit 602) increases the rotation speed of the indoor fan 120 or increases the rotation speed of the drive shaft of the compressor 112 when a temperature difference value, which is the absolute value of the difference between the indoor target temperature and the indoor temperature, is greater than a predetermined allowable temperature difference, compared to when the temperature difference value is equal to or less than the allowable temperature difference. With this additional configuration, the control method and program for the refrigeration cycle apparatus 10 according to the first embodiment advantageously prevent an excessive decrease in the ability of the air conditioning system 100 as a whole to adjust the temperature of the indoors of the building 400.

[0086] Furthermore, as an additional configuration, the air conditioning system 100 according to Embodiment 1 has the blower 20 installed on the indoor floor. With this additional configuration, the air conditioning system according to Embodiment 1 has the effect of being able to circulate cool air, which is denser than the air in the room, inside the room.

[0087] Furthermore, in the air conditioning system 100 according to the first embodiment, as an additional configuration, the blower 20 is a circulation blower that circulates the air in the room. With this additional configuration, the air conditioning system according to the first embodiment can circulate the air inside the room, thereby achieving the effect of circulating the air in the room uniformly.

[0088] Embodiment 2 An air conditioning system 200 according to embodiment 2 will be described. The air conditioning system 200 according to embodiment 2 differs from embodiment 1 in the processing performed by the control device 90. The outline of the air conditioning system 200, the configuration of the refrigeration cycle device 10, the configuration of the blower 20, and the hardware configuration of the air conditioning system 200 are the same as those of embodiment 1, and therefore description thereof will be omitted.

[0089] The air conditioning system 200 in the second embodiment is different from the air conditioning system 100 in the first embodiment in that the control signal generated by the control command generation unit 809 of the control device 90 is different. The functional configuration of the air conditioning system 200, excluding the control command generation unit 809, is the same as that of the air conditioning system 100, and therefore a description thereof will be omitted.

[0090] The control command generation unit 809 generates a control signal for the refrigeration cycle apparatus 10. More specifically, the control command generation unit 809 changes the rotation speed of the drive shaft of the compressor 112 of the refrigeration cycle apparatus 10. When the power determination unit 606 determines that the total power consumption is greater than the target power consumption, the control command generation unit 809 slows the rotation speed of the drive shaft of the compressor 112 compared to when the power determination unit 606 determines that the total power consumption is equal to or less than the target power consumption.

[0091] With this configuration, in the air conditioning system 200 according to the second embodiment, when the blower and the refrigeration cycle device are operated simultaneously, the refrigeration cycle device 10 can perform control that takes into account the circulation effect produced by the blower 20. This is because, when the total power consumption is greater than the target power consumption, even if the cooling effect of the refrigeration cycle device 10 is reduced by slowing the rotation speed of the drive shaft of the compressor 112 of the refrigeration cycle device 10, the ability of the air conditioning system 200 to adjust the temperature is considered to be sufficient. Furthermore, by slowing the rotation speed of the drive shaft of the compressor 112 with this configuration, the power consumption of the refrigeration cycle device 10 can be reduced.

[0092] In addition, when the temperature determination unit 608 determines that the temperature difference value is greater than the allowable temperature difference, the control command generation unit 809 increases the rotation speed of the drive shaft of the compressor 112 more than when the temperature determination unit 608 determines that the temperature difference value is equal to or less than the allowable temperature difference.

[0093] As described above, the air conditioning system 200 according to the second embodiment has the advantage of being able to prevent an excessive decrease in the ability of the air conditioning system 200 to adjust the temperature of the room of the building 400. This is because, when the rotation speed of the drive shaft of the compressor 112 is slowed down, if the absolute value of the difference between the measured temperature and the target temperature in the room is larger than the temperature differential value, it is highly likely that the temperature adjustment ability of the air conditioning system 200 has decreased too much. In other words, in the refrigeration cycle apparatus 10 according to the second embodiment that is performing cooling operation, it can be estimated that the measured temperature is lower than the value obtained by subtracting the temperature differential value from the target temperature.

[0094] Fig. 7 is a flowchart showing the processing performed by the control device 90 of the air conditioning system 200 according to Embodiment 2. The processing performed by the control device 90 will be described using Fig. 7 .

[0095] The processing from step S201 to step S204 is similar to the processing from step S101 to step S104 in the first embodiment, and therefore description thereof will be omitted. Step S205 is performed when it is determined in step S204 that the total power consumption is greater than the target power consumption (Yes in step S204). In step S205, the control command generation unit 809 generates a control command to slow the rotation speed of the drive shaft of the compressor 112 in the refrigeration cycle apparatus 10 compared to the rotation speed of the drive shaft of the compressor 112 in step S204. For example, the control command generation unit 809 reduces the rotation speed of the drive shaft of the compressor 112 by half. In step S205, when the control command generation unit 809 generates a control command to slow the rotation speed of the drive shaft of the compressor 112, the processing ends.

[0096] The process of step S206 is performed after the process of step S205. In step S206, the transceiver 602 transmits the command generated in step S205 to the transceiver 102 of the refrigeration cycle apparatus 10 to slow down the rotation speed of the drive shaft of the compressor 112 compared to the rotation speed of the drive shaft of the compressor 112 generated in step S204. When the transceiver 602 transmits the command to slow down the rotation speed of the drive shaft of the compressor 112, the process of step S206 ends.

[0097] The processing from step S207 to step S210 is similar to the processing from step S106 to step S110 in the first embodiment, and therefore description thereof will be omitted. Step S211 is performed after the processing of step S210. In step S211, the control command generation unit 809 generates a control command to increase the rotation speed of the drive shaft of the compressor 112 of the refrigeration cycle apparatus 10. For example, the control command generation unit 809 makes the rotation speed of the drive shaft of the compressor 112 twice the rotation speed in step S205. In step S211, when the control command generation unit 809 generates a control command to increase the rotation speed of the drive shaft of the compressor 112, the processing ends.

[0098] Step S212 is performed after the process of step S211. In step S212, the transceiver 602 transmits the command generated in step S211 to the transceiver 102 of the refrigeration cycle apparatus 10 to increase the rotation speed of the drive shaft of the compressor 112 in step S205. When the transceiver 602 transmits the command to increase the rotation speed of the drive shaft of the compressor 112, the process of step S212 ends.

[0099] As described above, the air conditioning system 200 according to the second embodiment, like the first embodiment, includes the compressor 112 that rotates a drive shaft to compress the refrigerant, the outdoor heat exchanger 114 that exchanges heat between the refrigerant and the air outside the building 400, the pressure reducing device 113 that reduces the pressure of the refrigerant, the indoor heat exchanger 110 that exchanges heat between the air inside the building 400 and the air outside the building 400 and that is provided with the blower 20, the indoor blower 111 that rotates the indoor fan 120 to send the indoor air to the indoor heat exchanger 110, and the compressor 112, the outdoor heat exchanger 114, the pressure reducing device 113, and the indoor heat exchanger 110. The air conditioning system 200 according to the second embodiment includes a refrigeration cycle device 10 having a refrigerant pipe 301 connecting the heat exchanger 110 and the refrigerant piping 301 so that the refrigerant circulates between the respective devices, and a control unit (corresponding to the control device 90) that simultaneously drives the refrigeration cycle device 10 and the blower 20, and that, when the total power consumption, which is the sum of the power consumption of the refrigeration cycle device 10 and the power consumption of the blower 20, is greater than a predetermined target power consumption, slows the rotation speed of the indoor fan 120 or slows the rotation speed of the drive shaft of the compressor 112 compared to when the total power consumption is equal to or less than the target power consumption. With this configuration, the air conditioning system 200 according to the second embodiment achieves the same effects as those described in the first embodiment.

[0100] Similarly to the first embodiment, the control method and program for the refrigeration cycle apparatus 10 according to the second embodiment includes a compressor 112 that rotates a drive shaft to compress a refrigerant, an outdoor heat exchanger 114 that discharges heat from inside the building 400 to the outside, a pressure reducing device 113 that reduces the pressure of the refrigerant, an indoor heat exchanger 110 that exchanges heat between the indoor air and the outdoor air, an indoor blower 111 that rotates an indoor fan 120 to send indoor air to the indoor heat exchanger 110, and a control system for controlling the compressor 112, the outdoor heat exchanger 114, the pressure reducing device 113, and the indoor heat exchanger 110. and a refrigerant pipe 301 connecting the refrigeration cycle apparatus 10 and the blower 20 installed indoors so that the refrigerant circulates between them, wherein a control unit (corresponding to a control device 90) slows down the rotation speed of the indoor fan 120 or slows down the rotation speed of the drive shaft of the compressor 112 when both the refrigeration cycle apparatus 10 and the blower 20 installed indoors are driven and the total power consumption, which is the sum of the power consumption of the refrigeration cycle apparatus 10 and the power consumption of the blower 20, is greater than a predetermined target power consumption, compared to when the total power consumption is equal to or less than the target power consumption. With this configuration, the control method and program for the refrigeration cycle apparatus 10 according to the first embodiment achieve the same effects as those described in the first embodiment.

[0101] Embodiment 3 An air conditioning system 300 according to embodiment 3 will be described. The air conditioning system 300 according to embodiment 3 is different from embodiment 1 in the flow of refrigerant in the refrigeration cycle device 70 and the position at which the blower 80 is installed. The outline of the air conditioning system 300, the configuration of the blower 80, the functional configuration of the air conditioning system 300, the hardware configuration of the air conditioning system 300, and the processing performed by the control device 60 are the same as those in embodiment 1, and therefore description thereof will be omitted.

[0102] Fig. 8 is a refrigerant circuit diagram showing an overview of a refrigeration cycle apparatus 70 according to embodiment 3. The refrigeration cycle apparatus 70 according to embodiment 3 performs heating operation. A specific configuration of the refrigeration cycle apparatus will be described using Fig. 8. In Fig. 8, the flow of refrigerant in the refrigeration cycle apparatus 70 during heating operation is indicated by dotted arrows.

[0103] The refrigeration cycle apparatus 70 of the third embodiment differs from the refrigeration cycle apparatus 10 of the first embodiment in the function of the indoor heat exchanger 110, the function of the outdoor heat exchanger 114, and the flow of refrigerant in the refrigeration cycle apparatus 70. The configuration other than the function of the indoor heat exchanger 110, the function of the outdoor heat exchanger 114, and the flow of refrigerant in the refrigeration cycle apparatus 70 is the same as that of the first embodiment, and therefore description thereof will be omitted.

[0104] The indoor heat exchanger 110 functions as a condenser, and the outdoor heat exchanger 114 functions as an evaporator.

[0105] The flow of refrigerant in the refrigeration cycle apparatus 70 will be described using FIG. 8 . High-pressure gas refrigerant discharged from the compressor 112 flows into the indoor heat exchanger 110. The high-pressure gas refrigerant that flows into the indoor heat exchanger 110 is condensed into liquid refrigerant. The liquid refrigerant that flows out of the indoor heat exchanger 110 flows into the pressure reducing device 113. The liquid refrigerant that flows into the pressure reducing device 113 is decompressed and expands into low-pressure gas-liquid two-phase refrigerant. The low-pressure gas-liquid two-phase refrigerant that flows out of the pressure reducing device 113 flows into the outdoor unit 12 and then into the outdoor heat exchanger 114. The low-pressure gas-liquid two-phase refrigerant that flows into the outdoor heat exchanger 114 evaporates into low-pressure gas refrigerant. The low-pressure gas refrigerant that flows out of the outdoor heat exchanger 114 flows into the compressor 112. By circulating in this manner, indoor air is heated by the high-temperature, high-pressure gas refrigerant in the indoor heat exchanger 110.

[0106] In the third embodiment, support portion 204 of blower 80 is fixed to the ceiling. Warm air blown out from indoor unit 11 has a lower density than the air inside building 400, and therefore tends to accumulate in the upper part of building 400. Therefore, by installing blower 80, which is a circulation blower, on the ceiling and circulating the air inside building 400, it is possible to circulate the air inside the room evenly.

[0107] As described above, the air conditioning system 300 according to the third embodiment, like the first embodiment, includes the compressor 112 that rotates a drive shaft to compress the refrigerant, the outdoor heat exchanger 114 that exchanges heat between the refrigerant and the air outside the building 400, the pressure reducing device 113 that reduces the pressure of the refrigerant, the indoor heat exchanger 110 that is equipped with the blower 80 and exchanges heat between the air inside the building 400 and the air outside the building, the indoor blower 111 that rotates the indoor fan 120 to send the air inside the room to the indoor heat exchanger 110, and the compressor 112, the outdoor heat exchanger 114, the pressure reducing device 113, and the indoor heat exchanger 110. The air conditioning system 300 according to the third embodiment includes a refrigeration cycle device 70 having a refrigerant pipe 301 connecting the heat exchanger 110 and the refrigerant piping 301 so that the refrigerant circulates between the respective devices, and a control unit (corresponding to the control device 90) that simultaneously drives the refrigeration cycle device 70 and the blower 80, and that, when the total power consumption, which is the sum of the power consumption of the refrigeration cycle device 70 and the power consumption of the blower 80, is greater than a predetermined target power consumption, slows the rotation speed of the indoor fan 120 or slows the rotation speed of the drive shaft of the compressor 112 compared to when the total power consumption is equal to or less than the target power consumption. With this configuration, the air conditioning system 300 according to the third embodiment achieves the same effects as those described in the first embodiment.

[0108] Similarly to the first embodiment, the control method and program for the refrigeration cycle apparatus 70 according to the third embodiment includes a compressor 112 that rotates a drive shaft to compress a refrigerant, an outdoor heat exchanger 114 that discharges heat from inside the building 400 to the outside, a pressure reducing device 113 that reduces the pressure of the refrigerant, an indoor heat exchanger 110 that exchanges heat between the indoor air and the outdoor air, an indoor blower 111 that rotates an indoor fan 120 to send indoor air to the indoor heat exchanger 110, and a control method and program for controlling the compressor 112, the outdoor heat exchanger 114, the pressure reducing device 113, and the indoor heat exchanger 110, respectively. and a refrigerant pipe 301 connecting the refrigeration cycle apparatus 70 and the blower 80 installed indoors so that the refrigerant circulates between them, wherein a control unit (corresponding to a control device 90) slows down the rotation speed of the indoor fan 120 or slows down the rotation speed of the drive shaft of the compressor 112 when both the refrigeration cycle apparatus 70 and the blower 80 installed indoors are driven and the total power consumption, which is the sum of the power consumption of the refrigeration cycle apparatus 70 and the power consumption of the blower 80, is greater than a predetermined target power consumption, compared to when the total power consumption is equal to or less than the target power consumption. With this configuration, the control method and program for the refrigeration cycle apparatus 70 according to the third embodiment achieve the same effects as those described in the first embodiment.

[0109] Furthermore, as an additional configuration, the air conditioning system 300 according to Embodiment 3 has the blower 80 installed on the ceiling of the room. With this additional configuration, the air conditioning system 300 according to Embodiment 3 has the effect of being able to circulate warm air, which has a lower density than the indoor air blown out from the indoor unit, inside the room.

[0110] Embodiment 4 An air conditioning system 410 according to embodiment 4 will be described. The air conditioning system 410 according to embodiment 4 differs from embodiment 1 in the configuration of the refrigeration cycle device 130 and the processing performed by the control device 140. The outline of the air conditioning system 410, the configuration of the blower 20, and the hardware configuration of the air conditioning system 410 are the same as those of embodiment 1, and therefore description thereof will be omitted.

[0111] In the air conditioning system 410 according to Embodiment 4, the refrigeration cycle device 130 switches between cooling operation and heating operation, unlike in Embodiment 1. With this configuration, the air conditioning system 410 has the advantage of being able to perform effective air conditioning by switching between cooling operation and heating operation as needed.

[0112] Furthermore, in the air conditioning system 410 according to the fourth embodiment, when the refrigeration cycle device 130 is performing cooling operation, if the control device 140 determines that the temperature difference value is greater than the allowable temperature difference and that the measured temperature inside the building 400 is higher than the target temperature, the control device 140 increases the rotation speed of the indoor fan 120 compared to when it determines that the temperature difference value is equal to or less than the allowable temperature difference or that the measured temperature inside the building is equal to or less than the target temperature.

[0113] Furthermore, when the refrigeration cycle device 130 is performing heating operation, if the control device 140 in the air conditioning system 410 determines that the temperature difference value is greater than the allowable temperature difference and that the measured temperature inside the building 400 is lower than the target temperature, it increases the rotation speed of the indoor fan 120 more than when it determines that the temperature difference value is equal to or less than the allowable temperature difference or when it determines that the measured temperature inside the building is equal to or greater than the target temperature.

[0114] In the refrigeration cycle apparatus 130 according to the fourth embodiment, a magnitude relationship between the measured indoor temperature and the target temperature is determined. This configuration allows the air conditioning system 410 to perform effective air conditioning. More specifically, when the refrigeration cycle apparatus 130 is performing cooling operation, if the indoor temperature is sufficiently cooled and is lower than the indoor target temperature minus the allowable temperature difference, control to further lower the indoor temperature can be prevented. Furthermore, when the refrigeration cycle apparatus 130 is performing heating operation, if the indoor temperature is sufficiently warmed and is higher than the indoor target temperature plus the allowable temperature difference, control to further raise the indoor temperature can be prevented.

[0115] Fig. 9 is a refrigerant circuit diagram showing an overview of a refrigeration cycle apparatus 130 according to embodiment 4. The refrigeration cycle apparatus 130 according to embodiment 4 is configured to be switchable between cooling operation and heating operation. A specific configuration of the refrigeration cycle apparatus 130 will be described using Fig. 9. In Fig. 9, the flow of refrigerant in the refrigeration cycle apparatus 130 during cooling operation is indicated by solid arrows, and the flow of refrigerant during heating operation is indicated by dotted arrows.

[0116] The refrigeration cycle device 130 includes a four-way valve 116. The four-way valve 116 switches between a refrigerant circuit during heating operation and a refrigerant circuit during cooling operation. Specifically, the four-way valve 116 has a first connection port 116a on the high-temperature side that communicates with the discharge port of the compressor 112, a second connection port 116b on the low-temperature side that communicates with the suction port of the compressor, a third connection port 116c that communicates with the indoor heat exchanger 110, and a fourth connection port 116d that communicates with the outdoor heat exchanger 114.

[0117] The four-way valve is, for example, a differential pressure driven four-way valve that includes a piston member that slides within a valve chamber, a main valve fixed between both ends of the piston member, and a differential pressure drive mechanism that generates a differential pressure between both ends of the piston member to switch the position of the main valve.

[0118] The function of the four-way valve 116 during cooling operation will be described. The flow of refrigerant during heating operation, excluding the four-way valve 116, is the same as in embodiment 1, and therefore will not be described again. High-pressure gas refrigerant discharged from the compressor 112 flows into the four-way valve 116 from a first connection port 116a. The refrigerant that flows into the four-way valve 116 flows out from a fourth connection port 116d and into the outdoor heat exchanger 114. Low-pressure gas refrigerant that flows out from the indoor heat exchanger 110 flows into the four-way valve 116 from a third connection port 116c. The refrigerant that flows into the four-way valve 116 flows out of the four-way valve 116 from a second connection port 116b and into the compressor 112.

[0119] The function of the four-way valve 116 during heating operation will be described. The flow of refrigerant during heating operation, excluding the four-way valve 116, is the same as in embodiment 2, so description thereof will be omitted. High-pressure gas refrigerant discharged from the compressor 112 flows into the four-way valve 116 from a first connection port 116a. The refrigerant that flows into the four-way valve 116 flows out from a third connection port 116c and into the indoor heat exchanger 110. Furthermore, low-pressure gas refrigerant that flows out from the outdoor heat exchanger 114 flows into the four-way valve 116 from a fourth connection port 116d. The refrigerant that flows into the four-way valve 116 flows out of the four-way valve 116 from a second connection port 116b and flows into the compressor 112.

[0120] That is, the refrigeration cycle apparatus 130 performs cooling operation when in a first state in which the suction port of the compressor 112 is connected to the indoor heat exchanger 110 and the discharge port of the compressor 112 is connected to the outdoor heat exchanger 114. On the other hand, the refrigeration cycle apparatus 130 performs heating operation when in a second state in which the suction port of the compressor 112 is connected to the outdoor heat exchanger 114 and the discharge port of the compressor 112 is connected to the indoor heat exchanger 110. On the other hand, the four-way valve 116 switches the refrigeration cycle apparatus 130 between the first state and the second state.

[0121] The functional configuration of the air conditioning system 410 will be described. The air conditioning system 410 differs from the first embodiment in the operations performed by the temperature determination unit 708 and the control command generation unit 909. The configuration other than the operations performed by the temperature determination unit 708 and the control command generation unit 909 is the same as in the first embodiment, and therefore description thereof will be omitted.

[0122] When it is determined that the total power consumption is greater than the target power consumption, the temperature determination unit 708 determines, after a predetermined detection time stored in the storage unit 605 has elapsed, whether the temperature difference value calculated by the temperature difference value calculation unit 607 is greater than the allowable temperature difference stored in the storage unit 605. Furthermore, when the temperature determination unit 708 determines that the temperature difference value is greater than the allowable temperature difference while the refrigeration cycle device 130 is performing cooling operation, it determines whether the measured temperature inside the building 400 is higher than the target temperature. Furthermore, when the temperature determination unit 708 determines that the temperature difference value is greater than the allowable temperature difference while the refrigeration cycle device 130 is performing heating operation, it determines whether the measured temperature inside the building 400 is lower than the target temperature.

[0123] The control command generation unit 909 generates a control command for the refrigeration cycle apparatus 130. More specifically, the control command generation unit 909 changes the rotation speed of the indoor fan 120 of the refrigeration cycle apparatus 130. When the power determination unit 606 determines that the total power consumption is greater than the target power consumption, the control command generation unit 909 slows the rotation speed of the indoor fan 120 compared to when the power determination unit 606 determines that the total power consumption is equal to or less than the target power consumption.

[0124] In addition, when the refrigeration cycle device 130 is operating in cooling mode and the temperature determination unit 708 determines that the temperature difference value is greater than the allowable temperature difference and that the measured temperature inside the building 400 is higher than the target temperature, the control command generation unit 909 increases the rotation speed of the indoor fan 120 compared to when the temperature determination unit 708 determines that the temperature difference value is equal to or less than the allowable temperature difference or that the measured temperature inside the building 400 is equal to or less than the target temperature.

[0125] In addition, when the refrigeration cycle device 130 is performing heating operation and the temperature determination unit 708 determines that the temperature difference value is greater than the allowable temperature difference and that the measured temperature inside the building 400 is lower than the target temperature, the control command generation unit 909 increases the rotation speed of the indoor fan 120 and the rotation speed of the drive shaft of the compressor 112 compared to when the temperature determination unit determines that the temperature difference value is equal to or less than the allowable temperature difference or when it determines that the measured temperature inside the building 400 is equal to or higher than the target temperature.

[0126] Fig. 10 is a flowchart showing the processing that the control device 140 of the air conditioning system 410 according to Embodiment 4 performs when the refrigeration cycle device 130 performs cooling operation. Using Fig. 10, the processing that the control device 140 performs when the refrigeration cycle device 130 performs cooling operation will be described.

[0127] The processing from step S301 to step S310 is the same as the processing from step S101 to step S110 in the first embodiment, and therefore the description thereof will be omitted.

[0128] Step S311 is performed when it is determined in step S310 that the temperature difference value is greater than the allowable temperature difference (step S310, Yes). In step S311, the temperature determination unit 708 determines whether the measured temperature inside the building 400 acquired in step S308 is higher than the target temperature. In step S311, the temperature determination unit 708 determines whether the condition is satisfied, and then the process ends.

[0129] Step S312 is performed when it is determined in step S311 that the measured temperature inside the building 400 is higher than the target temperature (step S311, Yes). The process of step S312 is the same as step S111 in the first embodiment, and therefore a description thereof will be omitted.

[0130] In step S311, if it is determined that the measured temperature inside the building 400 is equal to or lower than the target temperature (step S311, No), the control device 140 ends the processing.

[0131] The process of step S313 is the same as step S112 in the first embodiment, and therefore a description thereof will be omitted.

[0132] Fig. 11 is a flowchart showing the processing that the control device 140 of the air conditioning system 410 according to Embodiment 4 performs when the refrigeration cycle device 130 performs heating operation. Using Fig. 11, the processing that the control device 140 performs when the refrigeration cycle device 130 performs heating operation will be described.

[0133] The process performed by the control device 140 when the refrigeration cycle apparatus 130 performs heating operation differs from the process performed when the refrigeration cycle apparatus 130 performs cooling operation in the process of step S361. The processes from step S351 to step S360 are similar to the processes from step S301 to step S310, and therefore their explanations are omitted. Furthermore, the processes from step S362 and step S363 are similar to the processes from step S312 and step S313, and therefore their explanations are omitted.

[0134] Step S361 is performed when it is determined in step S360 that the temperature difference value is greater than the allowable temperature difference (step S360, Yes). In step S361, the temperature determination unit 708 determines whether the measured temperature inside the building 400 acquired in step S358 is lower than the target temperature. In step S361, the temperature determination unit 708 determines whether the condition is satisfied, and the process ends.

[0135] As described above, the air conditioning system 410 according to the fourth embodiment, like the first embodiment, includes the compressor 112 that rotates a drive shaft to compress a refrigerant, the outdoor heat exchanger 114 that exchanges heat between the refrigerant and the air outside the building 400, the pressure reducing device 113 that reduces the pressure of the refrigerant, the indoor heat exchanger 110 that exchanges heat between the air inside the building 400 and the air outside the building 400 and that is provided with the blower 20, the indoor blower 111 that rotates the indoor fan 120 to send the indoor air to the indoor heat exchanger 110, and the compressor 112, the outdoor heat exchanger 114, the pressure reducing device 113, and the indoor heat exchanger 110. The air conditioning system 410 according to the fourth embodiment includes a refrigeration cycle device 130 having a refrigerant pipe 301 connecting the refrigerant converter 110 and the refrigerant circulating device 110 so that the refrigerant circulates between the devices, and a control unit (corresponding to the control device 140) that simultaneously drives the refrigeration cycle device 130 and the blower 20, and that, when the total power consumption, which is the sum of the power consumption of the refrigeration cycle device 130 and the power consumption of the blower 20, is greater than a predetermined target power consumption, slows the rotation speed of the indoor fan 120 or slows the rotation speed of the drive shaft of the compressor 112 compared to when the total power consumption is equal to or less than the target power consumption. With this configuration, the air conditioning system 410 according to the fourth embodiment achieves the same effects as those described in the first embodiment.

[0136] Furthermore, the control method and program for the refrigeration cycle apparatus 130 according to the fourth embodiment, similar to the first embodiment, includes a compressor 112 that rotates a drive shaft to compress a refrigerant, an outdoor heat exchanger 114 that discharges heat from inside the building 400 to the outside, a pressure reducing device 113 that reduces the pressure of the refrigerant, an indoor heat exchanger 110 that exchanges heat between the indoor air and the outdoor air, an indoor blower device 111 that rotates an indoor fan 120 to send indoor air to the indoor heat exchanger 110, and a control method and program for controlling the refrigeration cycle apparatus 130 according to the fourth embodiment. and a refrigerant pipe 301 connected so that the refrigerant circulates through the refrigeration cycle apparatus 130, wherein a control unit (corresponding to the control device 140) slows down the rotation speed of the indoor fan 120 or slows down the rotation speed of the drive shaft of the compressor 112 when both the refrigeration cycle apparatus 130 and the blower 20 installed indoors are driven and when the total power consumption, which is the sum of the power consumption of the refrigeration cycle apparatus 130 and the power consumption of the blower 20, is greater than a predetermined target power consumption. With this configuration, the control method and program for the refrigeration cycle apparatus 130 according to the fourth embodiment achieve the same effects as those described in the first embodiment.

[0137] Furthermore, the air conditioning system 410 according to the fourth embodiment has an additional configuration in which the refrigeration cycle device 130 performs cooling operation in which the indoor heat exchanger 110 functions as an evaporator and the outdoor heat exchanger 114 functions as a condenser, and when the total power consumption is greater than the target power consumption, after a predetermined detection time has elapsed, the control unit (corresponding to the control device 140) increases the rotation speed of the indoor fan 120 or increases the rotation speed of the drive shaft of the compressor 112 when a temperature difference value, which is the absolute value of the difference between the indoor target temperature and the indoor temperature, is greater than a predetermined allowable temperature difference and the indoor temperature is higher than the target temperature, compared to when the temperature difference value is equal to or less than the allowable temperature difference or when the indoor temperature is equal to or less than the target temperature. With this additional configuration, the air conditioning system 410 according to the fourth embodiment can prevent control to further lower the indoor temperature when the indoor temperature is sufficiently cooled and lowered below the target temperature minus the temperature difference value, thereby achieving the effect of effective air conditioning.

[0138] Furthermore, the control method and program for the refrigeration cycle apparatus 130 according to the fourth embodiment additionally include a configuration in which, when the refrigeration cycle apparatus 130 is performing cooling operation in which the indoor heat exchanger 110 functions as an evaporator and the outdoor heat exchanger 114 functions as a condenser and the total power consumption is greater than the target power consumption, after a predetermined detection time has elapsed, the control unit (corresponding to the transceiver unit 602) increases the rotation speed of the indoor fan 120 or increases the rotation speed of the drive shaft of the compressor 112 when a temperature difference value, which is the absolute value of the difference between the indoor target temperature and the indoor temperature, is greater than a predetermined allowable temperature difference and the indoor temperature is higher than the target temperature, compared to when the temperature difference value is equal to or less than the allowable temperature difference or when the indoor temperature is equal to or less than the target temperature. With this additional configuration, the control method and program for the refrigeration cycle apparatus 130 according to the fourth embodiment can prevent control to further lower the indoor temperature when the indoor temperature is sufficiently cooled and lowered below the value obtained by subtracting the temperature difference value from the target temperature, thereby achieving the effect of effective air conditioning.

[0139] Furthermore, the air conditioning system 410 according to the fourth embodiment has an additional configuration in which the refrigeration cycle device 130 performs heating operation in which the indoor heat exchanger 110 functions as a condenser and the outdoor heat exchanger 114 functions as an evaporator, and when the total power consumption is greater than the target power consumption, after a predetermined detection time has elapsed, the control unit (corresponding to the control device 140) increases the rotation speed of the indoor fan 120 or increases the rotation speed of the drive shaft of the compressor 112 if a temperature difference value, which is the absolute value of the difference between the indoor target temperature and the indoor temperature, is greater than a predetermined allowable temperature difference and the indoor temperature is lower than the target temperature, compared to when the temperature difference value is equal to or less than the allowable temperature difference or when the indoor temperature is equal to or greater than the target temperature. With this additional configuration, the air conditioning system 410 according to the fourth embodiment can prevent control to further increase the indoor temperature when the indoor temperature is sufficiently warmed and higher than the sum of the target temperature and the allowable temperature difference, thereby achieving the effect of effective air conditioning.

[0140] Furthermore, the control method and program for the refrigeration cycle apparatus 130 according to the fourth embodiment additionally include a configuration in which the refrigeration cycle apparatus 130 performs heating operation in which the indoor heat exchanger 110 functions as a condenser and the outdoor heat exchanger 114 functions as an evaporator, and when the total power consumption is greater than the target power consumption, after a predetermined detection time has elapsed, the control unit (corresponding to the transceiver 602) increases the rotation speed of the indoor fan 120 or increases the rotation speed of the drive shaft of the compressor 112 when a temperature difference value, which is the absolute value of the difference between the indoor target temperature and the indoor temperature, is greater than a predetermined allowable temperature difference and the indoor temperature is lower than the target temperature, compared to when the temperature difference value is equal to or less than the allowable temperature difference or when the indoor temperature is equal to or greater than the target temperature. With this additional configuration, the control method and program for the refrigeration cycle apparatus 130 according to the fourth embodiment can prevent control to further increase the indoor temperature when the indoor temperature is sufficiently warmed and is higher than the sum of the target temperature and the allowable temperature difference, thereby achieving an effect of effective air conditioning.

[0141] Furthermore, in the air conditioning system 410 according to the fourth embodiment, as an additional configuration, the refrigeration cycle device 130 includes a four-way valve 116, which is configured to switch an internal communication state between a first state in which the suction port of the compressor 112 is connected to the indoor heat exchanger 110 and the discharge port of the compressor 112 is connected to the outdoor heat exchanger 114, and a second state in which the suction port of the compressor 112 is connected to the outdoor heat exchanger 114 and the discharge port of the compressor 112 is connected to the indoor heat exchanger 110. When the communication state is in the first state, the refrigeration cycle device 130 performs cooling operation, and when the communication state is in the second state, the refrigeration cycle device 130 performs heating operation. With this additional configuration, the air conditioning system 410 according to the fourth embodiment has the effect of being able to switch between cooling operation and heating operation as needed.

[0142] Fifth embodiment An air conditioning system 600 according to a fifth embodiment will be described. The air conditioning system 600 according to the fifth embodiment differs from the first to fourth embodiments in the processing performed by the control device 150. The outline of the air conditioning system 600, the configuration of the refrigeration cycle device 10, the configuration of the blower 20, and the hardware configuration of the air conditioning system 600 are the same as those of the first embodiment, and therefore description thereof will be omitted.

[0143] In the air conditioning system 600 according to the fifth embodiment, the refrigeration cycle device 10 and the blower 20 are driven simultaneously, and when it is determined that the total power consumption is greater than the target power consumption, the rotation speed of the indoor fan 120 is slowed down and the rotation speed of the drive shaft of the compressor 112 is slowed down compared to when it is determined that the total power consumption is equal to or less than the target power consumption.

[0144] Furthermore, in the air conditioning system according to embodiment 5, when the temperature difference value is greater than the allowable temperature difference, the control device 140 increases the rotation speed of the indoor fan 120 and the rotation speed of the drive shaft of the compressor 112 compared to when it is determined that the temperature difference value is equal to or less than the allowable temperature difference.

[0145] In the air conditioning system 600 according to the fifth embodiment, control is performed to change both the rotation speed of the indoor fan 120 and the rotation speed of the drive shaft of the compressor 112. By adopting such a configuration, it is possible to achieve the effect of further reducing the power consumption in the air conditioning system 600.

[0146] The functional configuration of the air conditioning system 600 will be described. The air conditioning system 600 differs from the first embodiment in the operation performed by the control command generator 919. The configuration except for the control command generator 919 is the same as that of the first embodiment, and therefore description thereof will be omitted.

[0147] The control command generation unit 919 generates a control command for the refrigeration cycle apparatus 10. More specifically, the control command generation unit 919 changes the rotation speed of the indoor fan 120 of the refrigeration cycle apparatus 10 and the rotation speed of the drive shaft of the compressor 112. When the power determination unit 606 determines that the total power consumption is greater than the target power consumption, the control command generation unit 919 slows down the rotation speed of the indoor fan 120 and the rotation speed of the drive shaft of the compressor 112 compared to when the power determination unit 606 determines that the total power consumption is equal to or less than the target power consumption.

[0148] Furthermore, when the temperature determination unit 708 determines that the temperature difference value is greater than the allowable temperature difference, the control command generation unit 919 increases the rotation speed of the indoor fan 120 and the rotation speed of the drive shaft of the compressor 112 compared to when the temperature determination unit 708 determines that the temperature difference value is equal to or less than the allowable temperature difference.

[0149] Fig. 12 is a flowchart showing the processing performed by the control device 150 of the air conditioning system 600 according to Embodiment 5. The processing performed by the control device 150 and the refrigeration cycle apparatus 10 will be described using Fig. 12 .

[0150] The processes from step S401 to step S405 are the same as the processes from step S101 to step S105 in embodiment 1, and therefore their explanations are omitted. The process from step S406 is the same as the process from step S205 in embodiment 2, and therefore their explanations are omitted.

[0151] Step S407 is performed after the processing of step S406. In step S407, the transceiver 602 transmits to the transceiver 102 of the refrigeration cycle apparatus 10 the command generated in step S405 to slow the rotation speed of the indoor fan 120 below the rotation speed of the indoor fan 120 in step S404, and the command generated in step S406 to slow the rotation speed of the drive shaft of the compressor 112 below the rotation speed of the drive shaft of the compressor 112 in step S404. When the transceiver 602 transmits the command to slow the rotation speed of the indoor fan 120 and the command to slow the rotation speed of the drive shaft of the compressor 112, the processing of step S407 ends.

[0152] The processes from step S408 to step S411 are the same as the processes from step S107 to step S110 in the first embodiment, and therefore the description thereof will be omitted.

[0153] Step S412 is performed when it is determined in step S411 that the measured temperature inside the building 400 is higher than the target temperature (step S411, Yes). The process of step S412 is the same as step S111 in the first embodiment, and therefore a description thereof will be omitted.

[0154] In step S411, if it is determined that the measured temperature inside the building 400 is equal to or lower than the target temperature (step S411, No), the control device 150 ends the processing.

[0155] The processing of step S413 is similar to step S211 in the second embodiment, and therefore description thereof will be omitted. The processing of step S414 is performed after the processing of step S413. In step S414, the transceiver 602 transmits to the transceiver 102 of the refrigeration cycle apparatus 10 the command generated in step S412 to increase the rotation speed of the indoor fan 120 beyond the rotation speed of the indoor fan 120 generated in step S411, and the command generated in step S413 to increase the rotation speed of the drive shaft of the compressor 112 beyond the rotation speed of the drive shaft of the compressor 112 generated in step S411. When the transceiver 602 transmits the command to increase the rotation speed of the indoor fan 120 and the command to increase the rotation speed of the drive shaft of the compressor 112, the processing of step S414 ends.

[0156] As described above, the air conditioning system 600 according to the fifth embodiment, like the first embodiment, includes the compressor 112 that rotates a drive shaft to compress a refrigerant, the outdoor heat exchanger 114 that exchanges heat between the refrigerant and the air outside the building 400, the pressure reducing device 113 that reduces the pressure of the refrigerant, the indoor heat exchanger 110 that is equipped with the blower 20 and exchanges heat between the air inside the building 400 and the air outside the building, the indoor blower 111 that rotates the indoor fan 120 to send the air inside the room to the indoor heat exchanger 110, and the compressor 112, the outdoor heat exchanger 114, the pressure reducing device 113, and the indoor heat exchanger 110. The air conditioning system 600 according to the fifth embodiment includes a refrigeration cycle apparatus 10 having a refrigerant pipe 301 connecting the refrigerant exchanger 110 and the refrigerant exchanger 110 so that the refrigerant circulates between the respective devices, and a control unit (corresponding to the control device 150) that simultaneously drives the refrigeration cycle apparatus 10 and the blower 20, and that, when the total power consumption, which is the sum of the power consumption of the refrigeration cycle apparatus 10 and the power consumption of the blower 20, is greater than a predetermined target power consumption, slows the rotation speed of the indoor fan 120 or slows the rotation speed of the drive shaft of the compressor 112 compared to when the total power consumption is equal to or less than the target power consumption. With this configuration, the air conditioning system 600 according to the fifth embodiment achieves the same effects as those described in the first embodiment.

[0157] Furthermore, the control method and program for the refrigeration cycle apparatus 10 according to the fifth embodiment, similar to the first embodiment, includes a compressor 112 that rotates a drive shaft to compress a refrigerant, an outdoor heat exchanger 114 that discharges heat from inside the building 400 to the outside, a pressure reducing device 113 that reduces the pressure of the refrigerant, an indoor heat exchanger 110 that exchanges heat between the indoor air and the outdoor air, an indoor blower device 111 that rotates an indoor fan 120 to send indoor air to the indoor heat exchanger 110, and a control method and program for controlling the compressor 112, the outdoor heat exchanger 114, the pressure reducing device 113, and the indoor heat exchanger 110 as respective devices. and a refrigerant pipe 301 connected so that a refrigerant circulates between the refrigeration cycle apparatus 10 and the blower 20 installed indoors, wherein a control unit (corresponding to a control device 150) slows down the rotation speed of the indoor fan 120 or slows down the rotation speed of the drive shaft of the compressor 112 when both the refrigeration cycle apparatus 10 and the blower 20 installed indoors are driven and the total power consumption, which is the sum of the power consumption of the refrigeration cycle apparatus 10 and the power consumption of the blower 20, is greater than a predetermined target power consumption. With this configuration, the control method and program for the refrigeration cycle apparatus 10 according to the fifth embodiment achieve the same effects as those described in the first embodiment.

[0158] The air conditioning system in the fifth embodiment is configured to determine whether the temperature difference value is greater than the allowable temperature difference, and then determine whether the measured temperature inside the building and the target temperature are higher or lower, but this is not limiting.The air conditioning system may be configured to determine whether the temperature difference value is greater than the allowable temperature difference after determining whether the measured temperature inside the building and the target temperature are higher or lower.

[0159] Furthermore, in the air conditioning systems according to the first to fifth embodiments, a blower is included in the air conditioning system, but this is not limiting. The air conditioning system may not include a blower as long as it is configured to be able to acquire the power consumption of the blower.

[0160] Furthermore, although the air conditioning systems in the first to fifth embodiments are configured to include a temperature detector, they may be configured not to include a temperature detector. When the refrigeration cycle device and the blower are driven simultaneously, if the total power consumption is greater than the target power consumption, the refrigeration cycle device can be controlled in consideration of the circulation effect caused by driving the blower by slowing down the rotation speed of the indoor fan or slowing down the rotation speed of the compressor drive shaft.

[0161] Furthermore, although the air conditioning systems in the first to fifth embodiments are configured to include a temperature detection device, the present invention is not limited to this. The air conditioning system may not include a temperature detection device as long as it is configured to acquire measured temperatures inside the building.

[0162] Furthermore, in the air conditioning systems according to the first to fifth embodiments, the blower is a circulation blower, but this is not limiting. The blower may be, for example, an intake ventilation fan that draws outside air into the interior of a building, or an exhaust ventilation fan that exhausts air from the interior of a building to the outside.

[0163] Furthermore, in the air conditioning systems according to the first to fifth embodiments, one blower is provided in each room of the building, but this is not limiting. A plurality of blowers may be provided in each room of the building. By providing a plurality of blowers in each room, air within the room can be circulated effectively.

[0164] Furthermore, in the air conditioning systems of the first to fifth embodiments, the processing is performed when the refrigeration cycle device is driven or at regular time intervals after the refrigeration cycle device is driven, but this is not limiting. For example, the processing may be performed when the blower is driven. Alternatively, the processing may be performed at any timing determined by the user.

[0165] Furthermore, in the air conditioning systems according to the first to fifth embodiments, whether the blower is operating is determined from information indicating power consumption. However, the present invention is not limited to this configuration, and any configuration capable of detecting whether the blower is operating may be used. For example, the configuration may be such that whether the blower is operating is determined by detecting the rotation speed of the blower fan. Furthermore, the configuration may be such that after the total power consumption is calculated, whether the blower is operating is determined using the total power consumption.

[0166] In the above embodiment, when the refrigeration cycle device performs cooling operation, the rotation speed of only the compressor is changed, and when both the rotation speed of the indoor fan and the rotation speed of the compressor are changed, but this is not limiting. When the refrigeration cycle device performs heating operation, the rotation speed of only the compressor may be changed, or the rotation speeds of both the indoor fan and the compressor may be changed.

[0167] In the air conditioning systems according to the first to fifth embodiments, the control device is configured as a separate device from the refrigeration cycle device, but this is not limiting. The control device may be built into the refrigeration cycle device.

[0168] The components of the control device of the air conditioning system according to the first to fifth embodiments may be arranged separately. For example, only the memory unit of the control device may be arranged as an independent memory device. Alternatively, part of the control device may be mounted on the refrigeration cycle device.

[0169] REFRIGERATION CYCLE DEVICE, 11 INDOOR UNIT, 12 OUTDOOR UNIT, 15 HARDWARE INTERFACE, 16 CONSTITUENT EQUIPMENT, 17 OPERATION DEVICE, 20 AIR BLOWER, 30 TEMPERATURE DETECTION DEVICE, 34 TEMPERATURE SENSOR, 35 HARDWARE INTERFACE, 40 POWER CONSUMPTION ACQUISITION DEVICE, 44 POWER USAGE METER, 45 HARDWARE INTERFACE, 50 POWER CONSUMPTION ACQUISITION DEVICE, 54 POWER USAGE METER, 55 HARDWARE INTERFACE, 60 CONTROL DEVICE, 65 HARDWARE INTERFACE, 66 PROCESSOR, 67 MEMORY, 68 STORAGE, 70 REFRIGERATION CYCLE DEVICE, 80 AIR BLOWER, 90 CONTROL DEVICE, 100 AIR CONDITIONING SYSTEM, 101 AIR CONDITIONING OPERATION UNIT, 102 TRANSMITTING AND RECEIVING UNIT, 103 TARGET TEMPERATURE ACQUISITION UNIT, 110 INDOOR HEAT EXCHANGER, 111 INDOOR AIR BLOWER, 112 COMPRESSOR, 113 DECOMPRESSION DEVICE, 114 OUTDOOR HEAT EXCHANGER, 115 OUTDOOR AIR BLOWER, 116 Four-way valve, 116a first connection port, 116b second connection port, 116c third connection port, 116d fourth connection port, 120 indoor fan, 121 indoor fan motor, 122 outdoor fan, 123 outdoor fan motor, 130 refrigeration cycle device, 140 control device, 200 air conditioning system, 201 blower motor, 202 blower fan, 203 fan guard, 204 support part, 300 air conditioning system, 301 refrigerant piping, 311 temperature detection part, 312 transmission part, 400 building, 401 power consumption acquisition part, 402 transmission part, 410 air conditioning system, 500 network, 501 power consumption acquisition part, 502 transmission part, 600 air conditioning system, 602 transmission / reception part, 603 drive determination part, 604 total power consumption calculation part, 605 Storage unit, 606 power determination unit, 607 temperature difference value calculation unit, 608 temperature determination unit, 609 control command generation unit, 708 temperature determination unit, 809 control command generation unit, 909 control command generation unit, 919 control command generation unit.

Claims

1. A refrigeration cycle device having a compressor that rotates a drive shaft to compress a refrigerant, an outdoor heat exchanger that exchanges heat between air outside a building and the refrigerant, a decompression device that reduces the pressure of the refrigerant, an indoor heat exchanger that exchanges heat between air in the indoor of the building equipped with a blower and the air outside, an indoor blower device that rotates an indoor fan to send the indoor air to the indoor heat exchanger, and a refrigerant pipe that connects the compressor, the outdoor heat exchanger, the decompression device, and the indoor heat exchanger so that the refrigerant circulates between the respective devices; and a control unit that drives the refrigeration cycle device and the blower simultaneously, and when the total power consumption, which is the sum of the power consumption of the refrigeration cycle device and the power consumption of the blower, is greater than a predetermined target power consumption, reduces the rotational speed of the indoor fan or reduces the rotational speed of the drive shaft of the compressor more than when the total power consumption is less than or equal to the target power consumption. An air conditioning system comprising the above.

2. When the total power consumption is greater than the target power consumption, after a predetermined detection time has elapsed, the control unit increases the rotational speed of the indoor fan or increases the rotational speed of the drive shaft of the compressor more when the absolute value of the difference between the target temperature in the room and the temperature in the room, which is the temperature difference value, is greater than a predetermined allowable temperature difference than when the temperature difference value is less than or equal to the allowable temperature difference. The air conditioning system according to claim 1.

3. The refrigeration cycle device performs a cooling operation in which the indoor heat exchanger functions as an evaporator and the outdoor heat exchanger functions as a condenser. When the total power consumption is greater than the target power consumption, after a predetermined detection time has elapsed, the control unit determines that the absolute value of the difference between the target temperature in the room and the temperature in the room, which is the temperature difference value, is greater than a predetermined allowable temperature difference, and the temperature in the room is higher than the target temperature. When the temperature difference value is less than or equal to the allowable temperature difference, or when the temperature in the room is less than or equal to the target temperature, the rotational speed of the indoor fan or the rotational speed of the drive shaft of the compressor is increased more. The air conditioning system according to claim 1.

4. The air conditioner system according to claim 3, wherein the blower is installed on the floor of the room.

5. The refrigeration cycle device performs a heating operation in which the indoor heat exchanger functions as a condenser and the outdoor heat exchanger functions as an evaporator. When the total power consumption is greater than the target power consumption, after a predetermined detection time has elapsed, if the temperature difference value, which is the absolute value of the difference between the target temperature in the room and the temperature in the room, is greater than a predetermined allowable temperature difference, and the temperature in the room is lower than the target temperature, or when the temperature difference value is less than or equal to the allowable temperature difference, or when the temperature in the room is greater than or equal to the target temperature, the air conditioner system according to claim 1 increases the rotational speed of the indoor fan or increases the rotational speed of the drive shaft of the compressor.

6. The air conditioner system according to claim 5, wherein the blower is installed on the ceiling of the room.

7. The air conditioner system according to any one of claims 1 to 6, wherein the blower is a circulation blower for circulating the air in the room.

8. The refrigeration cycle device includes a four-way valve. The four-way valve is configured such that the communication state inside switches between a first state in which the suction port of the compressor communicates with the indoor heat exchanger and the discharge port of the compressor communicates with the outdoor heat exchanger, and a second state in which the suction port of the compressor communicates with the outdoor heat exchanger and the discharge port of the compressor communicates with the indoor heat exchanger. When the communication state is the first state, the refrigeration cycle device performs a cooling operation, and when the communication state is the second state, the refrigeration cycle device performs a heating operation. The air conditioner system according to any one of claims 1 to 7.

9. A control method for a refrigeration cycle device including a compressor that rotates a drive shaft to compress a refrigerant, an outdoor heat exchanger that discharges heat in a building room to the outside, a decompression device that reduces the pressure of the refrigerant, an indoor heat exchanger that exchanges heat between the indoor air and the outdoor air, an indoor blower device that rotates an indoor fan to send the indoor air to the indoor heat exchanger, and a refrigerant pipe that connects the compressor, the outdoor heat exchanger, the decompression device, and the indoor heat exchanger so that the refrigerant circulates between the respective devices, wherein when the control unit drives both the refrigeration cycle device and a blower installed indoors, and the total power consumption, which is the sum of the power consumption of the refrigeration cycle device and the power consumption of the blower, is greater than a predetermined target power consumption, the rotational speed of the indoor fan is reduced or the rotational speed of the drive shaft of the compressor is reduced compared to when the total power consumption is less than or equal to the target power consumption. A control method for a refrigeration cycle device.

10. In a refrigeration cycle device including a compressor that rotates a drive shaft to compress a refrigerant, an outdoor heat exchanger that discharges heat in a building room to the outside, a decompression device that reduces the pressure of the refrigerant, an indoor heat exchanger that exchanges heat between the indoor air and the outdoor air, an indoor blower device that rotates an indoor fan to send the indoor air to the indoor heat exchanger, and a refrigerant pipe that connects the compressor, the outdoor heat exchanger, the decompression device, and the indoor heat exchanger so that the refrigerant circulates between the respective devices, when the control unit drives both the refrigeration cycle device and a blower installed indoors, and the total power consumption, which is the sum of the power consumption of the refrigeration cycle device and the power consumption of the blower, is greater than a predetermined target power consumption, a step of reducing the rotational speed of the indoor fan or reducing the rotational speed of the drive shaft of the compressor compared to when the total power consumption is less than or equal to the target power consumption is executed by a computer. A program.

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