Control device, air conditioning device, air conditioning system, air conditioning control method, and program
Patent Information
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- DAIKIN INDUSTRIES LTD
- Filing Date
- 2025-01-06
- Publication Date
- 2026-08-05
Smart Images
Figure 0007900706000001 
Figure 0007900706000002 
Figure 0007900706000003
Abstract
Description
Technical Field
[0005] , ,
[0001] The present disclosure relates to a control device, an air conditioner, an air conditioning system, an air conditioning control method, and a program.
Background Art
[0002] An air conditioner having an indoor unit that conditions an indoor space and a cooling device having a cooling unit that cools the air in a storage such as a showcase are known. The air conditioner of Patent Document 1 heats indoor air by an indoor unit and supplies the heated air to the indoor space. The cooling device of Patent Document 2 cools the air in the showcase by a cooling unit and supplies the cooled air into the showcase.
Prior Art Documents
Patent Documents
[0003]
Patent Document 1
Patent Document 2
Summary of the Invention
Problems to be Solved by the Invention
[0004] For example, in a store that handles food, etc., a storage is provided in the indoor space to be heated by the indoor unit, and the cooling unit of the cooling device may cool the air in this storage. Under such conditions, the heating of the indoor air by the indoor unit and the cooling of the inside of the storage by the cooling unit thermally affect each other. Conventionally, the air conditioner and the cooling device have been operated independently without considering such mutual thermal influence between the indoor unit and the cooling unit.
[0005] An object of the present disclosure is to realize air conditioning that takes into account the mutual thermal influence between an indoor unit and a cooling unit.
Means for Solving the Problems
[0006] The first embodiment relates to a control device. The control device includes an air conditioning system (10) having an indoor unit (20) for heating an indoor space (2), and a cooling system (40) having a cooling unit (50) for cooling the air in a storage room (5) provided in the indoor space (2). The control device (C) acquires first information regarding the heating load of the indoor unit (20) and second information regarding the cooling load of the cooling unit (50), and based on the acquired first and second information, it outputs a control signal that changes at least one of the heating capacity of the indoor unit (20) and the cooling capacity of the cooling unit (50).
[0007] In the first embodiment, the cooling unit (50) cools the storage compartment (5) of the indoor space (2) that is heated by the indoor unit (20), so the indoor unit (20) and the cooling unit (50) influence each other thermally. Therefore, the control unit (C) acquires first information regarding the heating load of the indoor unit (20) and second information regarding the cooling load of the cooling unit (50). Based on this information, the control unit (C) outputs a control signal to change the heating capacity of the indoor unit (20) or the cooling capacity of the cooling unit (50). This makes it possible to realize air conditioning that takes into account the mutual thermal influence between the indoor unit and the cooling unit.
[0008] In the second aspect, in the first aspect, the control unit (C) outputs a control signal to reduce the cooling capacity of the cooling unit (50) when the first condition is met, which indicates that the heating load of the indoor unit (20) is large and the cooling load of the cooling unit (50) is small.
[0009] In the second embodiment, under conditions where the heating load of the indoor unit (20) is large and the cooling load of the cooling unit (50) is small, the cooling capacity of the cooling unit (50) is reduced. When the cooling capacity of the cooling unit (50) is reduced, the amount of heat absorbed from the indoor air into the air inside the storage room (5) is reduced, so the heating load of the indoor unit (20) can be reduced. At the same time, by reducing the cooling capacity of the cooling unit (50), it is possible to suppress excessive cooling of the air inside the storage room (5).
[0010] A third aspect is a second aspect in which the first information includes the indoor temperature, which is the temperature of the air in the indoor space (2), and a first set temperature, which is the target temperature of the indoor unit (20). The second information includes the internal temperature, which is the temperature of the air inside the storage room (5), and a second set temperature, which is the target temperature of the cooling unit (50). The first condition is that the indoor temperature is lower than the first set temperature and the internal temperature is lower than the second set temperature.
[0011] In the third embodiment, under conditions where the indoor temperature is lower than the first set temperature of the indoor unit (20) and the internal temperature of the storage compartment is lower than the second set temperature of the cooling unit (50), the cooling capacity of the cooling unit (50) is reduced. As a result, the heating load of the indoor unit (20) can be reduced, and the indoor temperature can be brought closer to the first set temperature quickly. At the same time, by reducing the cooling capacity of the cooling unit (50), it is possible to prevent the temperature of the internal air in the storage compartment (5) from becoming excessively low.
[0012] In the fourth aspect, in the first aspect, the control unit (C) outputs a control signal to reduce the heating capacity of the indoor unit (20) when the second condition is met, which indicates that the heating load of the indoor unit (20) is small and the cooling load of the cooling unit (50) is large.
[0013] In the fourth embodiment, under conditions where the heating load of the indoor unit (20) is small and the cooling load of the cooling unit (50) is large, the heating capacity of the indoor unit (20) is reduced. When the heating capacity of the indoor unit (20) is reduced, the amount of heat absorbed from the indoor air into the air inside the storage room (5) is reduced, so the cooling load of the cooling unit (50) can be reduced. At the same time, by reducing the heating capacity of the indoor unit (20), it is possible to suppress excessive heating of the indoor air in the indoor space (2).
[0014] The fifth aspect is the fourth aspect, wherein the first information includes the indoor temperature, which is the temperature of the air in the indoor space (2), and the first set temperature, which is the target temperature of the indoor unit (20). The second information includes the internal temperature, which is the temperature of the air inside the storage room (5), and the second set temperature, which is the target temperature of the cooling unit (50). The second condition is that the indoor temperature is higher than the first set temperature and the internal temperature is higher than the second set temperature.
[0015] In the fifth embodiment, under conditions where the room temperature is higher than the first set temperature of the indoor unit (20) and the internal temperature is higher than the second set temperature of the cooling unit (50), the heating capacity of the indoor unit (20) is reduced. As a result, the cooling load on the cooling unit (50) can be reduced, allowing the internal temperature to quickly approach the second set temperature. At the same time, by reducing the heating capacity of the indoor unit (20), it is possible to suppress the temperature of the indoor air in the indoor space (2) from becoming excessively high.
[0016] The sixth embodiment further comprises, in any one of the first to fifth embodiments, an operating unit (130) for identifying an indoor unit (20) from among a plurality of indoor units (20) that is to be controlled by a control signal, or for identifying a cooling unit (50) from among a plurality of cooling units (50) that is to be controlled by a control signal.
[0017] In the sixth embodiment, the user can select the indoor unit (20) or cooling unit (50) to be controlled by operating the control unit (130). Therefore, air conditioning that takes into account the effects of heat is possible, especially for indoor units (20) and cooling units (50) which are particularly susceptible to heat.
[0018] In the seventh aspect, in the sixth aspect, the control unit (C) outputs a control signal to increase the heating capacity of the indoor unit (20) identified by the operating unit (130) among the multiple indoor units (20) when the third condition is met, which indicates that the heating load of each of the multiple indoor units (20) is large and the cooling load of the cooling unit (50) is large.
[0019] In the seventh embodiment, when the third condition is met, where the heating load of each of the multiple indoor units (20) is large and the cooling load of the cooling unit (50) is large, the heating capacity of a specific indoor unit (20) among the multiple indoor units (20) increases. Here, if the user operates the control unit (130) to identify an indoor unit (20) that is less affected by heat, the heating capacity of this indoor unit (20) increases under the third condition. Therefore, it is possible to suppress the increase in the cooling load of the cooling unit (50) caused by the increased heating capacity of this indoor unit (20).
[0020] The eighth aspect is, in the seventh aspect, the first information includes the indoor temperature, which is the temperature of the air in the indoor space (2), and the first set temperature, which is the target temperature of the indoor unit (20). The second information includes the internal temperature, which is the temperature of the air inside the storage room (5), and the second set temperature, which is the target temperature of the cooling unit (50). The third condition is that the indoor temperature is lower than the first set temperature and the internal temperature is higher than the second set temperature.
[0021] In the eighth aspect, under the condition that the indoor temperature is higher than the first set temperature of the indoor unit (20) and the temperature inside the storage is higher than the second set temperature of the cooling unit (50), the heating capacity of the specified indoor unit (20) among the plurality of indoor units (20) increases. When a user operates the operation unit (130) and an indoor unit (20) with little influence of heat is specified, the heating capacity of this indoor unit (20) increases under the third condition. Therefore, it is possible to suppress an increase in the cooling load of the cooling unit (50) due to an increase in the heating capacity of this indoor unit (20).
[0022] The ninth aspect is in the control device according to any one of the first to eighth aspects, and the control unit (C) controls a cooling device (40) having a cooling unit (50) that cools the air inside an open-type showcase (5) serving as a storage.
[0023] In the ninth aspect, since the storage is an open-type showcase (5), the influence of heat between the indoor air heated by the indoor unit (20) and the air inside the showcase (5) becomes particularly large. Therefore, the air conditioning control considering these heat influences is particularly effective.
[0024] The tenth aspect is directed to an air conditioner. The air conditioner includes a control device (C) according to any one of the first to ninth aspects and an indoor unit (20).
[0025] The eleventh aspect is directed to an air conditioning system. The air conditioning system includes a control device (C) according to any one of the first to ninth aspects, an air conditioner (10) communicably connected to the control device (C), and a cooling device (40) communicably connected to the control device (C).
[0026] Aspect 12 is directed to an air conditioning control method executed by a control device including a control unit (C) capable of outputting a control signal to an air conditioner (10) having an indoor unit (20) for heating an indoor space (2) and a cooling device (40) having a cooling unit (50) for cooling the air in a storage (5) provided in the indoor space (2). The control device performs steps of obtaining first information regarding the heating load of the indoor unit (20) and second information regarding the cooling load of the cooling unit (50), and outputting a control signal for changing the heating capacity of the indoor unit (20) or the cooling capacity of the cooling unit (50) based on the obtained first information and second information.
[0027] Aspect 13 is directed to a program. The program causes a computer to execute the air conditioning control method of Aspect 12.
Brief Description of the Drawings
[0028] [Figure 1] FIG. 1 is a schematic configuration diagram of an air conditioning system having an air conditioner and a cooling device. [Figure 2] FIG. 2 is a schematic piping system diagram of the air conditioner. [Figure 3] FIG. 3 is a schematic piping system diagram of the cooling device. [Figure 4] FIG. 4 is a block diagram showing the main equipment of the air conditioning system. [Figure 5] FIG. 5 is a control flowchart of the interlocking mode. [Figure 6] FIG. 6 is a control flowchart of the interlocking mode of Modification 1.
Modes for Carrying Out the Invention
[0029] The embodiments of this disclosure will be described in detail below with reference to the drawings. However, this disclosure is not limited to the embodiments shown below, and various modifications are possible without departing from the technical idea of this disclosure. Since the drawings are for conceptual explanation of this disclosure, dimensions, ratios, or numbers may be exaggerated or simplified as necessary for ease of understanding.
[0030] (1) Overall configuration of the air conditioning system The air conditioning system (1) is applied, for example, to a store that handles food. An indoor space (2) is formed in the store. A showcase (5) is installed in the indoor space (2). In this example, multiple showcases (5), specifically a first showcase (5A), a second showcase (5B), and a third showcase (5C), are installed in the indoor space (2). Hereinafter, the first showcase (5A), the second showcase (5B), and the third showcase (5C) may be collectively referred to as showcase (5). A showcase (5) is an example of a storage room provided in the indoor space (2). Inside the showcase (5), an internal storage space (6) is formed where food is stored. The showcase (5) is used for refrigeration or freezing of food. The showcase (5) in this embodiment is an open-type showcase in which the internal storage space (6) is open to the indoor space (2).
[0031] The air conditioning system (1) includes an air conditioning unit (10) and a cooling unit (40). The air conditioning unit (10) and the cooling unit (40) are applied to the same store. The air conditioning unit (10) and the cooling unit (40) are physically independent of each other.
[0032] The air conditioning system (10) provides air conditioning to the indoor space (2). The air conditioning system (10) includes a first outdoor unit (11) and indoor units (20). The air conditioning system (10) of this embodiment includes a plurality of indoor units (20), specifically a first indoor unit (20A), a second indoor unit (20B), and a third indoor unit (20C). Hereinafter, the first indoor unit (20A), the second indoor unit (20B), and the third indoor unit (20C) may be collectively referred to as indoor units (20). An indoor unit (20) is an example of a heating unit that heats the indoor space (2).
[0033] The cooling device (40) is used for refrigeration or freezing purposes inside the showcase (5). The cooling device (40) has a second outdoor unit (41) and a cooling unit (50). The cooling device (40) of this embodiment has a plurality of cooling units (50), specifically a first cooling unit (50A), a second cooling unit (50B), and a third cooling unit (50C). The first cooling unit (50A) is installed in the first showcase (5A), the second cooling unit (50B) is installed in the second showcase (5B), and the third cooling unit (50C) is installed in the third showcase (5C). Hereinafter, the first cooling unit (50A), the second cooling unit (50B), and the third cooling unit (50C) may be collectively referred to as the cooling unit (50). Hereafter, the first showcase (5A), the second showcase (5B), and the third showcase (5C) may be collectively referred to as showcase (5). The cooling unit (50) cools the air inside the storage room, which is showcase (5).
[0034] (2) Details of the air conditioning system The air conditioning system (10) of this embodiment is an indoor multi-type system. As shown in Figure 2, the air conditioning system (10) has one first outdoor unit (11) and three indoor units (20). The first outdoor unit (11) and the indoor units (20) are connected via two connecting pipes. This constitutes a closed-circuit first refrigerant circuit (R1) in the air conditioning system (10).
[0035] The first outdoor unit (11) is installed in the outdoor space (3). The first outdoor unit (11) has a first compressor (12), a first outdoor heat exchanger (13), a first outdoor expansion valve (14), and a first four-way switching valve (15) as elements connected to the first refrigerant circuit (R1). The first outdoor unit (11) has a first outdoor fan (16) that transports outdoor air passing through the first outdoor heat exchanger (13).
[0036] The first compressor (12) compresses the inhaled refrigerant and discharges the compressed refrigerant. The first compressor (12) is a variable displacement type with a variable rotation speed. The first outdoor heat exchanger (13) exchanges heat between the refrigerant in the first refrigerant circuit (R1) and the outdoor air transported by the first outdoor fan (16). The first outdoor expansion valve (14) reduces the pressure of the refrigerant in the first refrigerant circuit (R1). The first four-way switching valve (15) switches the flow path of the first refrigerant circuit (R1). The first four-way switching valve (15) is in the first state during cooling operation and in the second state during heating operation.
[0037] Each indoor unit (20) is installed in the indoor space (2). More precisely, the main body of the indoor unit (20) in this embodiment is installed in the ceiling space. That is, the indoor unit (20) is ceiling-mounted. The indoor unit (20) has an indoor heat exchanger (21) and an indoor expansion valve (22) as elements connected to the first refrigerant circuit (R1). The indoor unit (20) has an indoor fan (23) that transports indoor air passing through the indoor heat exchanger (21). The indoor heat exchanger (21) exchanges heat between the refrigerant of the first refrigerant circuit (R1) and the indoor air. The indoor expansion valve (22) reduces the pressure of the refrigerant in the first refrigerant circuit (R1).
[0038] (3) Details of the cooling system The cooling system (40) of this embodiment is a multi-type system. As shown in Figure 3, the cooling system (40) has one second outdoor unit (41) and three cooling units (50). The second outdoor unit (41) and the cooling units (50) are connected via two connecting pipes. This constitutes a closed-circuit second refrigerant circuit (R2) in the cooling system (40).
[0039] The second outdoor unit (41) is installed in the outdoor space (3). The second outdoor unit (41) has a second compressor (42), a second outdoor heat exchanger (43), a second outdoor expansion valve (44), and a second four-way switching valve (45) as elements connected to the second refrigerant circuit (R2). The second outdoor unit (41) has a second outdoor fan (46) that transports outdoor air passing through the second outdoor heat exchanger (43).
[0040] The second compressor (42) compresses the inhaled refrigerant and discharges the compressed refrigerant. The second compressor (42) is a variable displacement type with a variable rotation speed. The second outdoor heat exchanger (43) exchanges heat between the refrigerant in the second refrigerant circuit (R2) and the outdoor air transported by the second outdoor fan (46). The second outdoor expansion valve (44) reduces the pressure of the refrigerant in the second refrigerant circuit (R2). The second four-way switching valve (45) switches the flow path of the second refrigerant circuit (R2). The second four-way switching valve (45) switches between a first state shown by the solid line in Figure 3 and a second state shown by the dashed line in Figure 3. The second four-way switching valve (45) is in the first state during cooling operation and in the second state during defrost operation.
[0041] The cooling unit (50) is installed, for example, on the floor of the interior space (2). The cooling unit (50) has an internal heat exchanger (51) and an internal expansion valve (52) as elements connected to the second refrigerant circuit (R2). The cooling unit (50) has an internal fan (53) that transports the internal air passing through the internal heat exchanger (51). The internal heat exchanger (51) causes heat exchange between the refrigerant of the second refrigerant circuit (R2) and the internal air. The internal expansion valve (52) reduces the pressure of the refrigerant in the second refrigerant circuit (R2).
[0042] (4) sensor As shown in Figures 1 to 3, the air conditioning system (1) has multiple sensors. These multiple sensors include an indoor temperature sensor (25) and a storage interior temperature sensor (55).
[0043] The air conditioning system (1) of this embodiment has a plurality of indoor temperature sensors (25), specifically a first indoor temperature sensor (25A), a second indoor temperature sensor (25B), and a third indoor temperature sensor (25C). The first indoor temperature sensor (25A) detects the temperature around the first indoor unit (20A). The second indoor temperature sensor (25B) detects the temperature around the second indoor unit (20B). The third indoor temperature sensor (25C) detects the temperature around the third indoor unit (20C). Hereinafter, the first indoor temperature sensor (25A), the second indoor temperature sensor (25B), and the third indoor temperature sensor (25C) may be collectively referred to as the indoor temperature sensor (25). The indoor temperature sensor (25) is composed of an air conditioning-side intake temperature sensor that detects the temperature of the air drawn into the indoor unit (20).
[0044] The air conditioning system (1) of this embodiment has a plurality of internal temperature sensors (55), specifically a first internal temperature sensor (55A), a second internal temperature sensor (55B), and a third internal temperature sensor (55C). The first internal temperature sensor (55A) detects the internal temperature inside the first showcase (5A). The second internal temperature sensor (55B) detects the internal temperature inside the second showcase (5B). The third internal temperature sensor (55C) detects the internal temperature inside the third showcase (5C). Hereinafter, the first internal temperature sensor (55A), the second internal temperature sensor (55B), and the third internal temperature sensor (55C) may be collectively referred to as the internal temperature sensor (55). The internal temperature sensor (55) is composed of an intake temperature sensor on the inside of the interior that detects the temperature of the air drawn into the internal heat exchanger (51).
[0045] (5) Control device As shown in Figure 4, the air conditioning system (1) of this embodiment includes an air conditioning control unit (100) and a cooling control unit (120). The air conditioning control unit (100) is provided in the air conditioning device (10). The air conditioning control unit (100) includes a first controller (101) provided in the first outdoor unit (11) and a second controller (102) provided in the indoor unit (20). The cooling control unit (120) includes a third controller (121) provided in the second outdoor unit (41) and a fourth controller (122) provided in the cooling unit (50). The first controller (101), the second controller (102), the third controller (121), and the fourth controller (122) are connected to each other by wire or wireless.
[0046] The first controller (101), the second controller (102), the third controller (121), and the fourth controller (122) each include a microcomputer mounted on a control board, a memory device (specifically, semiconductor memory) for storing software to operate the microcomputer, and a communication interface for outputting and inputting signals.
[0047] The air conditioning control unit (100) controls the air conditioning system (10). Specifically, the air conditioning control unit (100) controls the ON / OFF switching of the first compressor (12), the rotational speed of the first compressor (12), the opening degree of the first outdoor expansion valve (14), the switching state of the first four-way switching valve (15), the ON / OFF switching of the first outdoor fan (16), the rotational speed of the first outdoor fan (16), the opening degree of the indoor expansion valve (22), the ON / OFF switching of the indoor fan (23), and the rotational speed of the indoor fan (23). The air conditioning control unit (100) receives the detected value from the indoor temperature sensor (25).
[0048] The cooling control unit (120) controls the cooling device (40). Specifically, the cooling control unit (120) controls the ON / OFF switching of the second compressor (42), the rotational speed of the second compressor (42), the opening degree of the second outdoor expansion valve (44), the switching of the state of the second four-way switching valve (45), the ON / OFF switching of the second outdoor fan (46), the rotational speed of the second outdoor fan (46), the opening degree of the internal expansion valve (52), the ON / OFF switching of the internal fan (53), and the rotational speed of the internal fan (53). The cooling control unit (120) receives the detected value from the internal temperature sensor (55).
[0049] In this embodiment, the air conditioning system (10) has a control unit (C) which is a control device. The control unit (C) controls the indoor unit (20) and the cooling unit (50) in conjunction. The control unit (C) includes a microcomputer mounted on a control board, a memory device (specifically a semiconductor memory) that stores software for operating the microcomputer, and a communication interface for outputting and inputting signals. The control unit (C) in this embodiment is incorporated into the air conditioning control unit (100). More specifically, the control unit (C) in this embodiment is provided in the first controller (101) of the first outdoor unit (11).
[0050] (6)Operation unit As shown in Figure 4, the air conditioning system (1) has an operating unit (130). The operating unit (130) is connected to the air conditioning control unit (100) and the cooling control unit (120) via wired or wireless connection. By operating the operating unit (130), the user can switch the air conditioning unit (10) ON / OFF, switch the operating mode of the air conditioning unit (10), set the first set temperature (hereinafter also referred to as the indoor set temperature (Ts1)), which is the target temperature of the indoor unit (20), switch the cooling unit (40) ON / OFF, switch the operating mode of the cooling unit (40), and set the second set temperature (hereinafter also referred to as the chamber set temperature (Ts2)), which is the target temperature of the cooling unit (50). The operating unit (130) may set the indoor set temperature (Ts1) for each of the multiple indoor units (20), or it may set a common indoor set temperature (Ts1) for the multiple indoor units (20). The internal temperature setting (Ts2) can be set for each of the multiple cooling units (50), or a common internal temperature setting (Ts2) can be set for all of the multiple cooling units (50).
[0051] The control unit (130) is configured to allow setting between a normal mode and an interlocking mode. The user can select between the normal mode and the interlocking mode by operating the control unit (130). The control unit (130) is configured to allow setting the target of the interlocking mode. Specifically, the control unit (130) is configured to allow selection between the indoor unit (20) that will be the target of the interlocking mode and the cooling unit (50) that will be the target of the interlocking mode. In other words, the control unit (130) is used to select from among multiple indoor units (20) the indoor unit (20) to which the control signal for the interlocking mode will be output. The control unit (130) is used to select from among multiple cooling units (50) the cooling unit (50) to which the control signal for the interlocking mode will be output.
[0052] The control unit (130) consists of, for example, a remote controller installed in the indoor space (2). The control unit (130) may be provided in the indoor unit (20) or the cooling unit (50), or it may be provided in a communication terminal operated by the user. The communication terminal consists of, for example, a smartphone, a personal computer, or a tablet terminal.
[0053] (7) Operating The air conditioning system (1) operates in both a normal mode and a linked mode. The normal mode is an operating mode in which the air conditioning unit (10) and the cooling unit (40) are controlled completely independently. The linked mode is a mode in which the heating capacity of the indoor unit (20) and the cooling capacity of the cooling unit (50) are controlled in coordination.
[0054] (7-1) Normal Mode In normal mode, the air conditioning unit (10) performs normal cooling and heating operations. In normal mode, the cooling unit (40) performs normal cooling operations.
[0055] During normal cooling operation, the air conditioning system (10) performs a refrigeration cycle in which the first outdoor heat exchanger (13) functions as a heat radiator (condenser) and the indoor heat exchanger (21) functions as an evaporator. Specifically, the refrigerant compressed by the first compressor (12) dissipates heat in the first outdoor heat exchanger (13), is depressurized by the indoor expansion valve (22), evaporates in the indoor heat exchanger (21), and is drawn back into the first compressor (12). The indoor air cooled by the indoor heat exchanger (21) is supplied to the indoor space (2).
[0056] In cooling operation, the air conditioning control unit (100) controls the cooling capacity of the indoor unit (20) based on the difference (first temperature difference (ΔT1=Tr-Ts1)) between the indoor temperature (Tr) detected by the indoor temperature sensor (25) and the indoor set temperature (Ts1). Specifically, the larger the first temperature difference (ΔT1), the lower the evaporation temperature of the indoor heat exchanger (21). In other words, the larger the first temperature difference (ΔT1), the higher the rotational speed of the first compressor (12).
[0057] During normal heating operation, the air conditioning system (10) performs a refrigeration cycle in which the indoor heat exchanger (21) functions as a radiator (condenser) and the first outdoor heat exchanger (13) functions as an evaporator. Specifically, the refrigerant compressed by the first compressor (12) releases heat in the indoor heat exchanger (21), is depressurized by the first outdoor expansion valve (14), evaporates in the first outdoor heat exchanger (13), and is drawn back into the first compressor (12). The indoor air heated in the indoor heat exchanger (21) is supplied to the indoor space (2).
[0058] During heating operation, the air conditioning control unit (100) controls the heating capacity of the indoor unit (20) based on the difference (second temperature difference (ΔT2 = Ts1 - Tr)) between the indoor set temperature (Ts1) and the indoor temperature (Tr) detected by the indoor temperature sensor (25). Specifically, the larger the second temperature difference (ΔT2), the higher the condensation temperature of the indoor heat exchanger (21). In other words, the larger the second temperature difference (ΔT2), the higher the rotational speed of the first compressor (12).
[0059] During normal cooling operation, the cooling system (40) performs a refrigeration cycle in which the second outdoor heat exchanger (43) functions as a heat radiator (condenser) and the internal heat exchanger (51) functions as an evaporator. Specifically, the refrigerant compressed by the second compressor (42) dissipates heat in the second outdoor heat exchanger (43), is depressurized by the internal expansion valve (52), evaporates in the internal heat exchanger (51), and is drawn into the second compressor (42). The internal air cooled by the internal heat exchanger (51) is supplied to the internal space (6) inside the showcase (5).
[0060] (7-2) Interlocking Mode In the linked mode, the air conditioning unit (10) performs the heating operation described above, and the cooling unit (40) performs the cooling operation described above. In the linked mode, the control unit (C) acquires first information regarding the heating load of the indoor unit (20) and second information regarding the cooling load of the cooling unit (50), and controls the heating capacity of the indoor unit (20) and the cooling capacity of the cooling unit (50) based on the acquired first and second information.
[0061] The specific control of the linked mode will be explained in detail with reference to Figure 5. In the following example, the user has selected the first indoor unit (20A) and the first cooling unit (50A) as the control targets for the linked mode.
[0062] In step ST11, when a command to start the interlocking mode is input to the control unit (C), the process moves to step ST12. In step ST12, the control unit (C) starts the interlocking mode. In the interlocking mode, each indoor unit (20) performs a heating operation to heat the indoor air, and at the same time, each cooling unit (50) performs a cooling operation to cool the air inside its respective chamber.
[0063] When the interlocking mode is executed, in step ST13, the control unit (C) identifies the indoor unit (20) and cooling unit (50) that are subject to the interlocking mode. In this example, the first indoor unit (20A) and the first cooling unit (50A) are subject to the interlocking mode. As shown in Figure 1, the distance between the first indoor unit (20A) and the first cooling unit (50A) is relatively short, so they are susceptible to thermal influence.
[0064] In step ST14, the control unit (C) acquires first information and second information. The first information is information regarding the heating load of the indoor unit (20), specifically the indoor temperature (Tr) and the indoor set temperature (Ts1). The second information is information regarding the cooling load of the cooling unit (50), specifically the internal temperature (Ti) and the internal set temperature (Ts2).
[0065] In step ST15, the control unit (C) determines whether the first condition is met. The first condition is that the heating load of the indoor unit (20) is large and the cooling load of the cooling unit (50) is small. In this example, the first indoor unit (20A) and the first cooling unit (50A) are selected as targets for the interlocking mode. Therefore, the control unit (C) determines whether the condition is met that the heating load of the first indoor unit (20A) to be controlled is large and the cooling load of the first cooling unit (50A) to be controlled is small.
[0066] More specifically, the first condition is that the room temperature (Tr) is lower than the first set temperature (room temperature setting (Ts1)) and the internal temperature (Ti) is lower than the second set temperature (internal temperature setting (Ts2)). In this example, the room temperature (Tr) is the value detected by the first room temperature sensor (25A). The internal temperature (Ti) is the value detected by the first internal temperature sensor (55A).
[0067] In heating operation, if the indoor temperature (Tr) is lower than the indoor set temperature (Ts1), it means that the heating load on the first indoor unit (20A) is high and the area around the first indoor unit (20A) is not sufficiently heated. In cooling operation, if the internal temperature (Ti) is lower than the internal set temperature (Ts2), it means that the cooling load on the first cooling unit (50A) is low and the internal space (6) of the first showcase (5A) is excessively cooled. Therefore, if the first condition is met, the control unit (C) reduces the cooling capacity of the cooling unit (50) in step ST17.
[0068] Specifically, in step ST17, the control unit (C) performs a first operation in which it outputs a control signal to reduce the cooling capacity of the first cooling unit (50A). In this specification, "output of a control signal" includes signal processing within a single piece of physical hardware. In the first operation of this embodiment, the control unit (C) outputs a control signal to reduce the opening degree of the internal expansion valve (52) of the first cooling unit (50A) or to close it completely. This reduces the cooling capacity of the internal heat exchanger (51) of the first cooling unit (50A). In step ST17, the control unit (C) may also reduce the rotation speed of the second compressor (42) or the rotation speed of the internal fan (53) of the first cooling unit (50A) in order to reduce the cooling capacity of the first cooling unit (50A).
[0069] When the cooling capacity of the first cooling unit (50A) decreases, the amount of heat absorbed from the surrounding room air into the first showcase (5A) decreases. As a result, the heating load on the first indoor unit (20A) can be reduced, and the temperature of the room air surrounding the first indoor unit (20A) can be raised rapidly. In particular, the first showcase (5A) is an open-type showcase. In addition, the distance between the first showcase (5A) and the first indoor unit (20A) is relatively short. For this reason, the effect of reducing the heating load on the first indoor unit (20A) by the first operation is high.
[0070] If the first condition is not met in step ST15, the process proceeds to ST16. In step ST16, the control unit (C) determines whether the second condition is met. The second condition indicates that the heating load of the indoor unit (20) is small and the cooling load of the cooling unit (50) is large. In this example, the first indoor unit (20A) and the first cooling unit (50A) are selected as targets for the interlocking mode. Therefore, the control unit (C) determines whether the conditions are met that the heating load of the first indoor unit (20A) to be controlled is small and the cooling load of the first cooling unit (50A) to be controlled is large. More specifically, the second condition is that the indoor temperature (Tr) is higher than the first set temperature (indoor set temperature (Ts1)) and the internal temperature (Ti) is higher than the second set temperature (internal set temperature (Ts2)).
[0071] In heating operation, if the indoor temperature (Tr) is higher than the indoor set temperature (Ts1), it means that the heating load on the first indoor unit (20A) is low and the indoor air surrounding the first indoor unit (20A) is excessively heated. In cooling operation, if the internal temperature (Ti) is higher than the internal set temperature (Ts2), it means that the cooling load on the first cooling unit (50A) is high and the internal space (6) of the first showcase (5A) is not sufficiently cooled. Therefore, if the second condition is met, the control unit (C) reduces the heating capacity of the indoor unit (20) in step ST18.
[0072] Specifically, in step ST18, the control unit (C) performs a second operation in which it outputs a control signal to reduce the heating capacity of the first indoor unit (20A). In the second operation of this embodiment, the control unit (C) outputs a control signal to reduce the opening degree of the indoor expansion valve (22) of the first indoor unit (20A) or to close it completely. As a result, the cooling capacity of the indoor heat exchanger (21) of the first indoor unit (20A) is reduced. In step ST18, the control unit (C) may also reduce the rotation speed of the first compressor (12) or the rotation speed of the indoor fan (23) of the first indoor unit (20A) in order to reduce the cooling capacity of the first indoor unit (20A).
[0073] When the heating capacity of the first indoor unit (20A) decreases, the amount of heat absorbed from the surrounding indoor air into the air inside the first showcase (5A) decreases. As a result, the cooling load on the first cooling unit (50A) can be reduced, and the temperature of the air inside the first showcase (5A) can be rapidly reduced. In particular, the first showcase (5A) is an open-type showcase. In addition, the distance between the first showcase (5A) and the first indoor unit (20A) is relatively short. For these reasons, the effect of reducing the cooling load on the first cooling unit (50A) by the second operation is high.
[0074] In step ST19, when the control unit (C) receives a command to terminate the interlocking mode, the process moves to step ST20. In step ST20, the control unit (C) terminates the interlocking mode.
[0075] (8) Characteristics (8-1) The control unit (C) acquires first information regarding the heating load of the indoor unit (20) and second information regarding the cooling load of the cooling unit (50), and outputs a control signal to change the heating capacity of the indoor unit (20) or the cooling capacity of the cooling unit (50) based on the acquired first information and second information.
[0076] Specifically, the control unit (C) executes a first operation to reduce the cooling capacity of the cooling unit (50) when a first condition is met, which indicates that the heating load of the indoor unit (20) is large and the cooling load of the cooling unit (50) is small. More specifically, the control unit (C) executes a first operation to reduce the cooling capacity of the cooling unit (50) when a first condition is met, which indicates that the indoor temperature (Tr) is lower than the indoor set temperature (Ts1) and the internal temperature (Ti) is lower than the internal set temperature (Ts2).
[0077] When the cooling capacity of the cooling unit (50) decreases, the amount of heat absorbed from the indoor air into the air inside the showcase (5) decreases, thus reducing the heating load on the indoor unit (20). As a result, the indoor temperature of the indoor space (2) can be quickly brought up to the indoor set temperature (Ts1).
[0078] At the same time, by reducing the cooling capacity of the cooling unit (50), it is possible to prevent the internal temperature of the showcase (5) from becoming excessively low. As a result, the temperature of food and other items inside the showcase (5) can be maintained at the desired temperature. In addition, the power consumption of the cooling device (40) can be reduced.
[0079] (8-2) The control unit (C) executes a second operation to reduce the heating capacity of the indoor unit (20) if the second condition is met, which indicates that the heating load of the indoor unit (20) is small and the cooling load of the cooling unit (50) is large. More specifically, the control unit (C) executes a second operation to reduce the heating capacity of the indoor unit (20) if the second condition is met, which indicates that the indoor temperature is higher than the first set temperature and the internal temperature is higher than the second set temperature.
[0080] When the heating capacity of the indoor unit (20) decreases, the amount of heat absorbed from the indoor air into the air inside the showcase (5) decreases, thus reducing the cooling load on the cooling unit (50). As a result, the internal temperature (Ti) of the interior space (6) can be quickly brought up to the set internal temperature (Ts2). In particular, if the internal temperature (Ti) is higher than the set internal temperature (Ts2), the quality of food and other items inside the showcase (5) may be compromised. The second operation quickly cools the air inside the showcase, thereby maintaining the quality of food and other items.
[0081] At the same time, by reducing the heating capacity of the indoor unit (20), it is possible to prevent the temperature inside the showcase (5) from becoming excessively high. As a result, the comfort of the indoor space (2) can be improved. In addition, the power consumption of the air conditioning system (10) can be reduced.
[0082] (8-3) The air conditioning control device further includes an operating unit (130) for identifying which of the multiple indoor units (20) are to be controlled by the control signal, and which of the multiple cooling units (50) are to be controlled by the control signal.
[0083] Therefore, indoor units (20) and cooling units (50), which are particularly susceptible to thermal effects, can be targeted for control in linked mode. Specifically, users can select indoor units (20) and cooling units (50) that are relatively close to each other, indoor units (20) and cooling units (50) with high rated capacities, or cooling units (50) that are compatible with open-type showcases (5). Furthermore, users can also select cooling units (50) for refrigeration applications (for refrigerated showcases) that are particularly susceptible to thermal effects from indoor units (20) from among the multiple cooling units (50). As a result, the aforementioned effects of linked mode can be fully realized.
[0084] (9) Variation 1 Modification 1 differs from the above-described embodiment in its interlocking mode air conditioning control method. The interlocking mode of Modification 1 will be explained with reference to Figure 6. Note that the control of steps ST21 to ST24, step ST27, and step ST28 in Modification 1 is the same as steps ST11 to ST14, step ST19, in the embodiment. Since the control is essentially the same as in step ST20, a detailed explanation will be omitted. In the following explanation of Modification 1, it is assumed that the user has identified the first indoor unit (20A) and the third cooling unit (50C) by operating the operating unit (130). The first indoor unit (20A) and the third cooling unit (50C) are relatively far apart, so they are less likely to be affected by each other's heat.
[0085] In step ST25, the control unit (C) determines whether the third condition is met. In this example, the third condition is that the heating load of each of the multiple indoor units (20) is large, and the cooling load of the cooling unit (50) is large. More specifically, the third condition is that for all of the multiple indoor units (20), the indoor temperature (Tr) is lower than the indoor set temperature (Ts1), and the internal temperature (Ti) of the specified cooling unit (50) (in this example, the third cooling unit (50C)) is higher than the internal set temperature (Ts2).
[0086] In step ST25, if the third condition is met, in step ST26, the control unit (C) performs a third operation, which outputs a control signal to increase the heating capacity of the identified indoor unit (20). Specifically, in the third operation, the control unit (C) increases the heating capacity of the first indoor unit (20A). Here, the distance between the first indoor unit (20A) and the third cooling unit (50C) is relatively long, and it is less affected by the heat of the third cooling unit (50C). Therefore, it is possible to suppress an increase in the cooling load of the third cooling unit (50C) caused by increasing the heating capacity of the first indoor unit (20A). As a result, it is possible to raise the temperature of the indoor air while suppressing insufficient cooling capacity of the third cooling unit (50C).
[0087] The third condition may also be that for all of the multiple indoor units (20), the indoor temperature (Tr) is lower than the indoor set temperature (Ts1), and for all of the multiple cooling units (50), the internal temperature (Ti) is higher than the internal set temperature (Ts2).
[0088] In the third operation of step SST26, the control unit (C) may increase the heating capacity of the identified first indoor unit (20A) and increase the cooling capacity of the third cooling unit (50C). This allows the interior space (6) of the third showcase (5C) to be cooled quickly.
[0089] (10) Other embodiments The indoor units (20) may be wall-mounted or floor-standing. The air conditioning system (10) may have one or two indoor units (20), or four or more indoor units (20). The air conditioning system may be any device that has the function of heating indoor air, and may be a heating-only unit or not a refrigeration cycle system. Specifically, for example, the air conditioning system may be a radiant air conditioning and heating system, a floor heating system, an electric heater, etc. In this case, these devices constitute the indoor units.
[0090] The cooling device (40) may have one or two cooling units (50), or four or more cooling units (50). The cooling device (40) may be any device that has the function of cooling the air inside the storage chamber, and does not have to be a refrigeration cycle device.
[0091] The storage room (5) located in the indoor space (2) may be a sealed display case or a warehouse for storing plants such as flowers.
[0092] The first information regarding the heating load of the indoor unit (20) may be parameters other than the indoor temperature or the first set temperature. The first information may be, for example, the rotational speed (operating frequency) of the first compressor (12), the condensation temperature of the indoor heat exchanger (21), or the opening degree of the indoor expansion valve (22).
[0093] The indoor temperature sensor (25) may be placed in the indoor space (2). One indoor temperature sensor (25) may be shared by multiple indoor units (20).
[0094] The second information regarding the cooling load of the cooling unit (50) may be parameters other than the internal temperature or the second set temperature. The second information may be, for example, the rotational speed (operating frequency) of the second compressor (42), the evaporation temperature of the internal heat exchanger (51), or the opening degree of the internal expansion valve (52).
[0095] The control unit (C) may change both the heating capacity of the indoor unit (20) and the cooling capacity of the cooling unit (50) based on the first and second information.
[0096] The control unit (C) may increase the heating capacity of the indoor unit (20) and the cooling capacity of the cooling unit (50) based on the first and second information. Specifically, for example, if the heating load of the indoor unit (20) is high and the cooling load of the cooling unit (50) is high, the control unit (C) may maintain the heating capacity of the indoor unit (20) and increase the cooling capacity of the cooling unit (50). This allows the air inside the storage area to be cooled quickly, and enables air conditioning control that prioritizes maintaining the quality of food and other items in the storage area (5).
[0097] The control unit (C) may control all indoor units (20) and cooling units (50) in linked mode. In this case, the user does not need to select the control target using the operation unit (130). The operation unit (130) may specify both the indoor units (20) and the cooling units (50) to be controlled, or it may specify only one of them.
[0098] The first condition may be that the room temperature is lower than a first value which is lower than the first set temperature and the internal temperature is lower than the second set temperature, or that the room temperature is lower than a first value which is lower than the first set temperature and the internal temperature is lower than a second value which is lower than the second set temperature, or that the room temperature is lower than the first set temperature and the internal temperature is lower than a second value which is lower than the second set temperature.
[0099] The second condition may be that the room temperature is higher than a third value greater than the first set temperature and the internal temperature is higher than the second set temperature; or that the room temperature is higher than a third value greater than the first set temperature and the internal temperature is higher than a fourth value greater than the second set temperature; or that the room temperature is higher than the first set temperature and the internal temperature is higher than a fourth value greater than the second set temperature.
[0100] The third condition may be that the room temperature is lower than the fifth value which is less than the first set temperature and the internal temperature is higher than the second set temperature, or that the room temperature is lower than the fifth value which is less than the first set temperature and the internal temperature is higher than the sixth value which is greater than the second set temperature, or that the room temperature is lower than the first set temperature and the internal temperature is higher than the sixth value which is greater than the second set temperature.
[0101] The control unit (C) may be provided in the second controller (102) of the indoor unit (20). The control unit (C) may also be provided in the operating unit (130) of the air conditioning system (10).
[0102] The control unit (C) may be provided in the cooling device (40). Specifically, the control unit (C) may be provided in the cooling control unit (120) of the cooling unit (50), or more specifically, in the third controller (121) or the fourth controller (122).
[0103] The control unit (C) may be provided in the air conditioning system (1). In this case, the air conditioning system (1) comprises a control device which is the control unit (C), an air conditioning unit (10) which is communicatively connected to the control device, and a cooling unit (40) which is communicatively connected to the control device. The control device is configured to be physically separate from the air conditioning unit (10) and the cooling unit (40). The control device may include, for example, a server unit, a central monitoring unit, and a user communication terminal, and is connected to the air conditioning unit (10) and the cooling unit (40) by wireless or wired means.
[0104] (11) Additional remarks The air conditioning control method of this disclosure includes any of the steps of the embodiments and modifications described above.
[0105] The program of this disclosure is used to cause a computer to perform an air conditioning control method which includes steps of any of the embodiments and variations described above.
[0106] While embodiments and modifications have been described above, it will be understood that a variety of changes in form and details are possible without departing from the spirit and scope of the claims. Furthermore, the embodiments, modifications, and other embodiments described above may be combined or substituted as appropriate, as long as they do not impair the functions covered by this disclosure.
[0107] The designations "1st," "2nd," "3rd," etc., mentioned above are used to distinguish between the terms to which these designations are attached, and do not limit the number or order of those terms. [Industrial applicability]
[0108] As described above, this disclosure is useful for control devices, air conditioning devices, air conditioning systems, air conditioning control methods, and programs. [Explanation of Symbols]
[0109] 1. Air conditioning system 2 Indoor space 5. Showcase (storage room) 10. Air conditioning system 20 Indoor Units 40 Cooling device 50 Cooling Units 130 Operation section C control section Ti internal temperature Tr Indoor temperature
Claims
1. A control device comprising an air conditioning system (10) having an indoor unit (20) for heating an indoor space (2) and a first refrigerant circuit (R1) having a first compressor (12), and a cooling system (40) having a cooling unit (50) for cooling the air in a storage room (5) provided in the indoor space (2) and a second refrigerant circuit (R2) having a second compressor (42), wherein the control device comprises a control unit (C) capable of outputting control signals to these systems, The control unit (C) acquires first information regarding the heating load of the indoor unit (20) and second information regarding the cooling load of the cooling unit (50), and outputs a control signal to change the heating capacity of the indoor unit (20) or the cooling capacity of the cooling unit (50) based on the acquired first and second information. The control unit (C) outputs a control signal to reduce the cooling capacity of the cooling unit (50) when the first condition is met, which indicates that the heating load of the indoor unit (20) is large and the cooling load of the cooling unit (50) is small. Control device.
2. The first information includes the indoor temperature, which is the temperature of the air in the indoor space (2), and the first set temperature, which is the target temperature of the indoor unit (20). The second information includes the internal temperature, which is the temperature of the air inside the storage chamber (5), and the second set temperature, which is the target temperature of the cooling unit (50). The first condition is that the room temperature is lower than the first set temperature and the internal temperature of the storage unit is lower than the second set temperature. The control device according to claim 1.
3. A control device comprising a control unit (C) capable of outputting control signals to an air conditioning system (10) having an indoor unit (20) for heating an indoor space (2) and a first refrigerant circuit (R1) having a first compressor (12), and a cooling system (40) having a cooling unit (50) for cooling the air in a storage room (5) provided in the indoor space (2) and a second refrigerant circuit (R2) having a second compressor (42), wherein The control unit (C) acquires first information regarding the heating load of the indoor unit (20) and second information regarding the cooling load of the cooling unit (50), and outputs a control signal to change the heating capacity of the indoor unit (20) or the cooling capacity of the cooling unit (50) based on the acquired first and second information. The control unit (C) outputs a control signal to reduce the heating capacity of the indoor unit (20) when the second condition is met, which indicates that the heating load of the indoor unit (20) is small and the cooling load of the cooling unit (50) is large. Control device.
4. The first information includes the indoor temperature, which is the temperature of the air in the indoor space (2), and the first set temperature, which is the target temperature of the indoor unit (20). The second information includes the internal temperature, which is the temperature of the air inside the storage chamber (5), and the second set temperature, which is the target temperature of the cooling unit (50). The second condition is that the room temperature is higher than the first set temperature and the internal temperature of the storage unit is higher than the second set temperature. The control device according to claim 3.
5. A control device comprising a control unit (C) capable of outputting control signals to an air conditioning system (10) having an indoor unit (20) for heating an indoor space (2) and a first refrigerant circuit (R1) having a first compressor (12), and a cooling system (40) having a cooling unit (50) for cooling the air in a storage room (5) provided in the indoor space (2) and a second refrigerant circuit (R2) having a second compressor (42), wherein The control unit (C) acquires first information regarding the heating load of the indoor unit (20) and second information regarding the cooling load of the cooling unit (50), and outputs a control signal to change the heating capacity of the indoor unit (20) or the cooling capacity of the cooling unit (50) based on the acquired first and second information. The system further includes an operating unit (130) for identifying which of the multiple indoor units (20) is to be controlled by the control signal, or for identifying which of the multiple cooling units (50) is to be controlled by the control signal. Control device.
6. The control unit (C) outputs a control signal to increase the heating capacity of the indoor unit (20) identified by the operation unit (130) among the multiple indoor units (20) when the third condition is met, which indicates that the heating load of each of the multiple indoor units (20) is large and the cooling load of the cooling unit (50) is large. The control device according to claim 5.
7. The first information includes the indoor temperature, which is the temperature of the air in the indoor space (2), and the first set temperature, which is the target temperature of the indoor unit (20). The second information includes the internal temperature, which is the temperature of the air inside the storage chamber (5), and the second set temperature, which is the target temperature of the cooling unit (50). The third condition is that the room temperature is lower than the first set temperature and the internal temperature is higher than the second set temperature. The control device according to claim 6.
8. The control unit (C) controls a cooling device (40) which has a cooling unit (50) that cools the air inside the open-type showcase (5) used as a storage area. The control device according to any one of claims 1 to 7.
9. A control device (C) according to any one of claims 1 to 7, An air conditioning system comprising the aforementioned indoor unit (20).
10. A control device (C) according to any one of claims 1 to 7, The air conditioning device (10) is connected to the control device (C) in a communicative manner, The cooling device (40) is connected to the control device (C) in a communicative manner. Air conditioning system.
11. An air conditioning control method executed by a control device equipped with a control unit (C) capable of outputting control signals to an air conditioning system (10) having an indoor unit (20) for heating an indoor space (2) and a first refrigerant circuit (R1) having a first compressor (12), and a cooling system (40) having a cooling unit (50) for cooling the air in a storage room (5) provided in the indoor space (2) and a second refrigerant circuit (R2) having a second compressor (42), wherein The control device is The steps include obtaining first information regarding the heating load of the indoor unit (20) and second information regarding the cooling load of the cooling unit (50), Based on the acquired first and second information, if a first condition is met indicating that the heating load of the indoor unit (20) is large and the cooling load of the cooling unit (50) is small, the following steps are performed: outputting a control signal to reduce the cooling capacity of the cooling unit (50). Air conditioning control method.
12. An air conditioning control method executed by a control device comprising a control unit (C) capable of outputting control signals to an air conditioning device (10) having an indoor unit (20) for heating an indoor space (2) and a first refrigerant circuit (R1) having a first compressor (12), and a cooling device (40) having a cooling unit (50) for cooling the air in a storage room (5) provided in the indoor space (2) and a second refrigerant circuit (R2) having a second compressor (42), wherein The control device is The steps include obtaining first information regarding the heating load of the indoor unit (20) and second information regarding the cooling load of the cooling unit (50), Based on the acquired first and second information, if a second condition is met indicating that the heating load of the indoor unit (20) is small and the cooling load of the cooling unit (50) is large, the following steps are performed: outputting a control signal to reduce the heating capacity of the indoor unit (20). Air conditioning control method.
13. A program for causing a computer to execute the air conditioning control method described in claim 11 or 12.