Air conditioning system

Abstract

To provide an air conditioning system capable of reducing electric power consumption.SOLUTION: An air conditioning system 100 includes: an outdoor unit 15 capable of controlling output through temperature setting; a plurality of indoor units 10a-10i disposed in the same space and connected to the outdoor unit 15; a control section 50 that independently controls a set temperature of the indoor unit so as to uniformly allocate output to the plurality of indoor units 10a-10i; and a plurality of air blowers 20j-20u that stir air in the same space. The control section 50 determines air quantities of the air blowers 20j-20u on the basis of a magnitude of a high load indoor unit that is an indoor unit having a relatively large load out of the indoor units 10a-10i.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to an air conditioning system. [Background technology]

[0002] Conventionally, air conditioning systems that provide air conditioning using multiple indoor units in the same room are known (for example, Patent Document 1). In such air conditioning systems, each indoor unit is operated to maintain a uniform temperature in the room in order to reduce discomfort caused by temperature variations. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2021-4702 Summary of the Invention [Problem to be solved by the invention]

[0004] In a room, temperature variations occur due to factors such as sunlight or the opening and closing of doors, which causes differences in the output of each indoor unit. This means that the output of some indoor units increases relatively, reducing energy consumption efficiency and resulting in a tendency for energy consumption to increase. [Means for solving the problem]

[0005] To solve this problem, the air conditioning system of the present invention includes an outdoor unit whose output can be controlled by temperature setting, multiple indoor units arranged in the same space and connected to the outdoor unit, a control unit that independently controls the set temperatures of the indoor units so as to allocate output evenly among the multiple indoor units, and multiple fans that agitate the air in the same space. The control unit determines the airflow rate of the fans based on the magnitude of the load of a high-load indoor unit that has a relatively large load among the indoor units. [Effects of the Invention]

[0006] The present invention can provide an air conditioning system that can reduce energy consumption. [Brief explanation of the drawings]

[0007] [Figure 1] FIG. 1 is a top view of the living room. [Figure 2] FIG. 2 is a functional block diagram showing the components of the control unit. [Figure 3] FIG. 3 is a diagram showing the relationship between the temperature difference value and the index difference value. [Figure 4] FIG. 4 is a diagram showing the relationship between the calculated index difference value and the set temperature change amount. [Figure 5] FIG. 5 is a functional block diagram showing the connections of the components required for the airflow volume setting process. [Figure 6] FIG. 6 is a diagram showing changes over time in the classification information of the indoor units. [Figure 7] FIG. 7 is a diagram showing corresponding combinations of fans and indoor units. [Figure 8] FIG. 8 is a diagram showing the relationship between the high load temperature difference value and the airflow rate. [Figure 9] FIG. 9 is a diagram showing the relationship between the load difference value and the amount of change in the airflow rate. [Figure 10] FIG. 10 is a flow diagram showing the operation of the entire air conditioning system. [Figure 11] FIG. 11 is a flowchart showing the initial condition setting process. [Figure 12] FIG. 12 is a flowchart showing the air flow rate setting process. [Figure 13] FIG. 13 is a flowchart showing the target index value update process. [Figure 14] FIG. 14 is a flowchart showing the set temperature update process. DETAILED DESCRIPTION OF THE INVENTION

[0008] The present invention relates to a system for controlling a temperature of an indoor unit, a blower, and an outdoor unit connected to the indoor unit, the system being provided in the same space. The purpose of this invention is to reduce the energy consumption of the entire air conditioning system, which is configured to include a compressor.

[0009] Within the same space, for example, a space near a window that is susceptible to sunlight is prone to temperature fluctuations, which can cause temperature variations within the space. When such temperature variations occur, the temperature difference between the intake temperature of the indoor unit that conditions the space near the window and the target temperature of the same space becomes relatively large compared to the other indoor units. In other words, to eliminate this temperature difference, it is necessary to increase the output of the indoor unit that conditions the space near the window. In the past, this resulted in an increase in the output of some indoor units, which led to variations in the superheat of each indoor unit, and as a result, energy consumption efficiency tended to deteriorate.

[0010] Therefore, the present invention reduces the output of indoor units with high output, for example, those conditioning spaces near windows, and increases the output of indoor units with low output, for example, those conditioning spaces farther from windows. This prevents a decrease in energy consumption efficiency due to increased output of some indoor units and reduces the energy consumption of the air conditioning system. In other words, the present invention reduces the energy consumption of an air conditioning system by equalizing the "output" of each indoor unit rather than matching the "set temperature" of each indoor unit. Furthermore, if the "output" of each indoor unit is equalized, spaces that are more susceptible to the influence of external temperatures, such as spaces near windows, will be less effective in air conditioning than spaces farther from windows, which may result in temperature variations within the room. Therefore, the present invention aims to provide an air conditioning system that efficiently mixes the air in a room by controlling the airflow rates of multiple fans, thereby reducing discomfort caused by temperature variations and, as described above, reducing energy consumption.

[0011] Hereinafter, embodiments that can achieve the above object will be described with reference to the drawings. Note that the following embodiments show an example of an air conditioning system according to the present invention. The numerical values, shapes, materials, components, positional relationships of the components, steps (processes), and the order of steps shown in the embodiments are examples and are not intended to limit the scope of the claims. In each drawing, substantially identical components are assigned the same reference numerals, and duplicate explanations may be omitted or simplified. (Embodiment 1) The air conditioning system 100 will be described with reference to Fig. 1. Fig. 1 is a top view of a room 80 that is air-conditioned by the air conditioning system 100, as seen from above.

[0012] The air conditioning system 100 air-conditions a room 80, which is one room in a building.

[0013] Living room 80 is a space surrounded by a ceiling, a floor, a window 97, a first side wall 94 which is the left side wall of living room 80, a second side wall 95 which is the side wall of living room 80 opposite to the window 97, and a third side wall 96 which is the right side wall of living room 80. Living room 80 is a space where people live, and is, for example, a room in a building such as a house or a commercial facility. For ease of explanation, in this embodiment, living room 80 will be described by dividing it into nine spaces surrounded by dashed lines. Specifically, living room 80 will be described by dividing it into space 80a, space 80b, space 80c, space 80d, space 80e, space 80f, space 80g, space 80h, and space 80i.

[0014] The space 80a is located on the opposite side of the window 97, and is a space surrounded by the second side wall 95, the dashed lines AA, CC, and DD.

[0015] The space 80b is located on the opposite side from the window 97, and is a space surrounded by the second side wall 95, the dashed lines AA, DD, and EE. The space 80b is located to the right of the space 80a.

[0016] The space 80c is a space located on the opposite side of the window 97, and is connected to the second side wall 95 and the broken line AA. The space 80c is the space surrounded by the line EE and the dashed line FF. The space 80c is located to the right of the space 80b.

[0017] The space 80d is a space surrounded by dashed lines AA, BB, CC, and DD. The space 80d is located closer to the window 97 than the space 80a.

[0018] The space 80e is a space surrounded by dashed lines AA, BB, DD, and EE. The space 80e is located closer to the window 97 than the space 80b, and is located to the right of the space 80d.

[0019] The space 80f is a space surrounded by dashed lines AA, BB, EE, and FF. The space 80f is located closer to the window 97 than the space 80c, and is located to the right of the space 80e.

[0020] Space 80g is a space located on the window 97 side and is a space surrounded by the window 97 and dashed lines BB, CC, and DD. Space 80g is a space located closer to the window 97 than space 80d.

[0021] Space 80h is located on the window 97 side and is a space surrounded by window 97 and dashed lines BB, DD, and EE. Space 80h is located closer to window 97 than space 80e and to the right of space 80g.

[0022] Space 80i is located on the window 97 side and is a space surrounded by the window 97 and dashed lines BB, EE, and FF. Space 80i is located closer to the window 97 than space 80f, and is located to the right of space 80h.

[0023] The manner in which the spaces 80a to 80i are divided is not particularly limited, but in this embodiment, the spaces 80a to 80i are divided so that they have approximately equal areas.

[0024] The air conditioning system 100 includes an indoor unit group 10, an outdoor unit 15, a plurality of fans 20j to 20u, and an operation unit 25. The "plurality of fans 20j to 20u" are also collectively referred to as "each fan."

[0025] The indoor unit group 10 is made up of multiple indoor units arranged in the living room 80, i.e., in the same space. Specifically, the indoor unit group 10 is made up of indoor unit 10a, indoor unit 10b, indoor unit 10c, indoor unit 10d, indoor unit 10e, indoor unit 10f, indoor unit 10g, indoor unit 10h, and indoor unit 10i. Note that the "multiple indoor units 10a to 10i" are also collectively referred to as "indoor units 10a to 10i."

[0026] The indoor unit 10a is provided in the space 80a. The indoor unit 10a includes a temperature acquisition unit 30a that acquires the temperature of air drawn into the indoor unit 10a from the space 80a.

[0027] The indoor unit 10b is provided in the space 80b. The indoor unit 10b includes a temperature acquisition unit 30b that acquires the temperature of air drawn into the indoor unit 10b from the space 80b.

[0028] The indoor unit 10c is provided in the space 80c. The indoor unit 10c includes a temperature acquisition unit 30c that acquires the temperature of air drawn into the indoor unit 10c from the space 80c.

[0029] The indoor unit 10d is provided in the space 80d. The indoor unit 10d includes a temperature acquisition unit 30d that acquires the temperature of air drawn into the indoor unit 10d from the space 80d.

[0030] The indoor unit 10e is provided in a space 80e. The indoor unit 10e includes a temperature acquisition unit 30e that acquires the temperature of air drawn into the indoor unit 10e from the space 80e.

[0031] The indoor unit 10f is provided in the space 80f. The indoor unit 10f includes a temperature acquisition unit 30f that acquires the temperature of air drawn into the indoor unit 10f from the space 80f.

[0032] The indoor unit 10g is provided in the space 80g. The indoor unit 10g includes a temperature acquisition unit 30g that acquires the temperature of air drawn into the indoor unit 10g from the space 80g.

[0033] The indoor unit 10h is provided in the space 80h. The indoor unit 10h includes a temperature acquisition unit 30h that acquires the temperature of air drawn into the indoor unit 10h from the space 80h.

[0034] The indoor unit 10i is provided in the space 80i. The indoor unit 10i includes a temperature acquisition unit 30i that acquires the temperature of air drawn into the indoor unit 10i from the space 80i.

[0035] Each of the temperature acquisition units 30a to 30i is, for example, a temperature sensor.

[0036] The "plurality of temperature acquisition units 30a to 30i" are also collectively referred to as "each temperature acquisition unit."

[0037] The indoor unit group 10 (indoor units 10a to 10i) is connected to the outdoor unit 15 so that a refrigerant can circulate between them.

[0038] The outdoor unit 15 can control the output to the indoor units 10a to 10i by setting the temperature. Specifically, the outdoor unit 15 adjusts the amount of refrigerant supplied to the indoor units 10a to 10i based on the set temperatures of the indoor units 10a to 10i set by a control unit 50, which will be described later. The outdoor unit 15 is preferably installed, for example, on the roof or balcony of a building. The outdoor unit 15 is equipped with a control unit 50.

[0039] The control unit 50 independently controls the set temperatures of the indoor units 10a to 10i so as to allocate the output from the outdoor unit 15 evenly to the indoor units 10a to 10i, as will be described in detail later.

[0040] The fans 20j to 20u are so-called ceiling fans that are installed on the ceiling of the living room 80 and provide a downward air current or an upward air current to the living room 80. The fans 20j to 20u may be installed anywhere as long as they are capable of stirring the air in the living room 80. In this embodiment, a total of 12 fans are installed between the indoor units 10a to 10i, etc.

[0041] The fan 20j is provided on the dashed line CC between the dashed line AA and the second side wall 95. The fan 20j is located on the left side of the indoor unit 10a. The fan 20j mainly agitates the air in the space 80a.

[0042] The fan 20k is provided on the dashed line DD between the dashed line AA and the second side wall 95. The fan 20k is located to the right of the indoor unit 10a and to the left of the indoor unit 10b. The fan 20k mainly agitates the air in the spaces 80a and 80b.

[0043] The fan 20l is provided on the dashed line EE between the dashed line AA and the second side wall 95. The fan 20l is located to the right of the indoor unit 10b and to the left of the indoor unit 10c. The fan 20l mainly agitates the air in the spaces 80b and 80c.

[0044] The fan 20m is provided on the dashed line FF between the dashed line AA and the second side wall 95. The fan 20m is located on the right side of the indoor unit 10c. The fan 20m mainly agitates the air in the space 80c.

[0045] The fan 20n is provided on the dashed line CC between the dashed lines AA and BB. The fan 20n is located on the left side of the indoor unit 10d. The fan 20n mainly agitates the air in the space 80d.

[0046] The fan 20o is provided on the dashed line DD between the dashed lines AA and BB. The fan 20o is located to the right of the indoor unit 10d and to the left of the indoor unit 10e. The fan 20o mainly agitates the air in the spaces 80d and 80e.

[0047] The fan 20p is provided on the dashed line EE between the dashed lines AA and BB. The fan 20p is located to the right of the indoor unit 10e and to the left of the indoor unit 10f. The fan 20p mainly agitates the air in the spaces 80e and 80f.

[0048] The fan 20q is provided on the dashed line FF between the dashed lines AA and BB. The fan 20q is located on the right side of the indoor unit 10f. The fan 20q mainly agitates the air in the space 80f.

[0049] The fan 20r is provided on the dashed line CC between the dashed line BB and the window 97. The fan 20r is located on the left side of the indoor unit 10g. The fan 20r mainly agitates the air in the space 80g.

[0050] The fan 20s is provided on the dashed line DD between the dashed line BB and the window 97. The fan 20s is located to the right of the indoor unit 10g and to the left of the indoor unit 10h. The fan 20s mainly agitates the air in the spaces 80g and 80h.

[0051] The fan 20t is provided on the dashed line EE between the dashed line BB and the window 97. The fan 20t is located to the right of the indoor unit 10h and to the left of the indoor unit 10i. The fan 20t mainly agitates the air in the space 80h and the space 80i.

[0052] The fan 20u is provided on the dashed line FF between the dashed line BB and the window 97. The fan 20u is located on the right side of the indoor unit 10i. The fan 20u mainly agitates the air in the space 80i.

[0053] It should be noted that the fans 20j to 20u are provided for the purpose of agitating the air in the living room 80, and therefore do not necessarily have to be ceiling fans, and may be, for example, circulators or the like.

[0054] The operation unit 25 is connected to be able to communicate with the indoor units 10a to 10i, the outdoor unit 15, and the fans 20j to 20u, and is configured, for example, by a touch panel. The operation unit 25 allows the user to set, for example, the air conditioning temperature, and may also be configured to display the current room temperature or humidity. In this embodiment, the operation unit 25 is provided on the first side wall 94, but it may also be a portable terminal such as a tablet terminal.

[0055] Next, the role and configuration of the control unit 50 will be described with reference to Fig. 2. Fig. 2 is a functional block diagram showing the components of the control unit 50.

[0056] The control unit 50 is communicably connected to the outdoor unit 15, the indoor units 10a to 10i, and the fans 20j to 20u. The control unit 50 performs an air flow rate setting process and an index value maintaining process.

[0057] As part of the airflow volume setting process, the control unit 50 classifies the indoor units 10a to 10i into high-load indoor units 10H, which should have a relatively high output among the indoor units 10a to 10i, and low-load indoor units 10L, which should have a lower output than the high-load indoor units 10H.

[0058] Furthermore, as the airflow rate setting process, the control unit 50 sets the airflow rate of the fans 20j-20u corresponding to the high-load indoor unit 10H based on the magnitude of the load of that high-load indoor unit 10H, thereby efficiently agitating the air in the living room 80. More specifically, the control unit 50 uses the suction temperatures acquired by the temperature acquisition units 30a-30i corresponding to the indoor units 10a-10i to set the airflow rates of the fans 20j-20u to be greater than the current airflow rates when the temperature difference between the target temperature of the living room 80 and the suction temperature of the high-load indoor unit 10H is tending to increase. Furthermore, when the difference between the target temperature and the suction temperature of the high-load indoor unit 10H is tending to decrease, the control unit 50 sets the airflow rate of the fans 20j-20u to be smaller than the current airflow rates. The fan for which the airflow rate is set is the fan among the fans 20j to 20u that has a correspondence relationship with the high-load indoor unit 10H, and details of this correspondence will be described later. Also, the fan that corresponds to the high-load indoor unit 10H is also referred to as the "high-load fan 20H."

[0059] As an index value maintenance process, the control unit 50 independently controls the set temperatures of the high-load indoor units 10H so that the outputs to the high-load indoor units 10H are uniform at the first output A1. The control unit 50 also independently controls the set temperatures of the low-load indoor units 10L so that the outputs to the low-load indoor units 10L are uniform at the second output A2, which is smaller than the first output A1. More precisely, the control unit 50 controls the set temperatures of the high-load indoor units 10H so that the index values ​​of the indoor units belonging to the high-load indoor unit 10H are uniform at the high-load target index value LtH, which corresponds to the first output A1. The control unit 50 also independently controls the set temperatures of the low-load indoor units 10L so that the index values ​​of the indoor units belonging to the low-load indoor unit 10L are uniform at the low-load target index value LtL, which corresponds to the second output A2.

[0060] The index value is a numerical value that correlates with the output of the outdoor unit 15. In this embodiment, as an example, the maximum value of the index value is set to

[20] and the minimum value is set to [0]. The maximum value means, for example, that the output from the outdoor unit 15 to the indoor units 10a to 10i matches the rated capacity of the outdoor unit 15. The minimum value means, for example, that there is no output from the outdoor unit 15 to the indoor units 10a to 10i.

[0061] The control unit 50 may control the set temperatures of the indoor units 10a to 10i so that the outputs to these indoor units are uniform. In other words, the control unit 50 may perform the index value maintenance process without classifying the indoor units 10a to 10i into high-load indoor units 10H and low-load indoor units 10L.

[0062] Furthermore, as an example of the index value maintenance process, for example, during cooling operation, the control unit 50 sets the set temperature of any indoor unit among the indoor units 10a to 10i for which the temperature difference between the target temperature of the living room 80 and the suction temperature is relatively large higher than the target temperature of the living room 80. Also, the control unit 50 sets the set temperature of any indoor unit for which the temperature difference between the target temperature of the living room 80 and the suction temperature is relatively small lower than the target temperature of the living room 80. Furthermore, for example, during heating operation, the control unit 50 sets the set temperature of any indoor unit among the indoor units 10a to 10i for which the temperature difference between the target temperature of the living room 80 and the suction temperature is relatively large lower than the target temperature of the living room 80. Also, the control unit 50 sets the set temperature of any indoor unit for which the temperature difference between the target temperature of the living room 80 and the suction temperature is relatively small higher than the target temperature of the living room 80.

[0063] The control unit 50 repeatedly performs the index value maintenance process to make the index values ​​of the indoor units 10a to 10i match the target index values, and controls the set temperatures of the indoor units 10a to 10i so that the temperature in the living room 80 approaches the target temperature. The index value maintenance process includes a target index value update process that determines a target index value, which is a target value for the index value, and a set temperature change process that determines a set temperature at which the indoor units 10a to 10i can be operated at the target index value, and details of this will be described later.

[0064] The control unit 50 includes an intake temperature difference calculation unit 52, an indoor unit classification unit 54, a temperature difference value calculation unit 51, a current index value acquisition unit 53, a target index value update unit 55, an average index value calculation unit 63, a temperature management unit 65, an index value change amount memory unit 61, a set temperature change amount memory unit 77, and an airflow volume setting unit 90.

[0065] The suction temperature difference calculation unit 52 calculates the suction temperature difference Tid, which is the temperature difference between the suction temperature Ti and the target temperature Tt, for each of the indoor units 10a to 10i, and outputs the calculated value to the indoor unit classification unit .

[0066] The indoor unit classification unit 54 classifies the indoor units 10a to 10i into high-load indoor units 10H, which should have a relatively high output among the indoor units 10a to 10i, and low-load indoor units 10L, which should have a lower output than the high-load indoor units 10H. Specifically, among the indoor units 10a to 10i, those with a relatively large suction temperature difference Tid are classified as high-load indoor units 10H, and those with a smaller suction temperature difference Tid than the high-load indoor units 10H are classified as low-load indoor units 10L. More specifically, among the indoor units 10a to 10i, the indoor unit classification unit 54 classifies those with a suction temperature difference Tid equal to or greater than a predetermined threshold as high-load indoor units 10H, and those with a suction temperature difference Tid smaller than the predetermined threshold as low-load indoor units 10L. Note that there are no particular limitations on how the predetermined threshold is set. For example, the user may determine it in advance, or the control unit 50 may determine it as appropriate based on the distribution of room temperature, etc.

[0067] Furthermore, the indoor unit classification unit 54 outputs the classification results of the indoor units 10a to 10i to the airflow volume setting unit 90 (more precisely, to the classification information storage unit 87, which will be described later). In this embodiment, the indoor unit classification unit 54 classifies the indoor units 10g to 10i located on the window 97 side as high-load indoor units 10H. Furthermore, the indoor unit classification unit 54 classifies the indoor units 10a to 10f located far from the window 97 side as low-load indoor units 10L (see FIG. 1). Note that when classifying the indoor units 10a to 10i, the indoor unit classification unit 54 may control a predetermined number of indoor units from the indoor units 10a to 10i in descending order of the suction temperature difference Tid to be high-load indoor units 10H, and the remaining indoor units to be low-load indoor units 10L.

[0068] The high-load indoor unit 10H is an indoor unit among the indoor units 10a to 10i that should have a relatively large output. Specifically, the high-load indoor unit 10H is an indoor unit among the indoor units 10a to 10i that has a relatively large suction temperature difference Tid. More specifically, the high-load indoor unit 10H is an indoor unit among the indoor units 10a to 10i that has a suction temperature difference Tid that is equal to or greater than a predetermined threshold.

[0069] The low-load indoor unit 10L is an indoor unit among the indoor units 10a to 10i that should have a lower output than the high-load indoor unit 10H. Specifically, the low-load indoor unit 10L is an indoor unit among the indoor units 10a to 10i that has a relatively small suction temperature difference Tid. More specifically, the low-load indoor unit 10L is an indoor unit among the indoor units 10a to 10i that has a suction temperature difference Tid that is equal to or greater than a predetermined threshold value.

[0070] Furthermore, there are no particular restrictions on the control when there is only one high-load indoor unit 10H or one low-load indoor unit 10L. For example, the control unit 50 may control the indoor units excluding that one to allocate output evenly and operate that one unit independently, or may control the indoor units 10a to 10i to allocate output evenly to all of the indoor units 10a to 10i.

[0071] Furthermore, there are no particular limitations on the control when the number of high-load indoor units 10H or low-load indoor units 10L is 0. For example, the control unit 50 controls the indoor units 10a to 10i so as to allocate outputs equally.

[0072] The temperature difference calculation unit 51 calculates the intake temperature T i from the temperature acquisition units 30a to 30i. The temperature difference value calculation unit 51 calculates a high-load temperature average value TiavH, which is the average value of the suction temperatures Ti of the high-load indoor units 10H, based on the multiple suction temperatures Ti that have been acquired. Furthermore, the temperature difference value calculation unit 51 calculates a low-load temperature average value TiavL, which is the average value of the suction temperatures Ti of the low-load indoor units 10L. The high-load temperature average value TiavH and the low-load temperature average value TiavL are also referred to as "temperature average values ​​Tiav."

[0073] The temperature difference value calculation unit 51 calculates a high-load temperature difference value TdH from the difference between the high-load temperature average value TiavH and a preset target temperature Tt in the room 80. Furthermore, the temperature difference value calculation unit 51 calculates a low-load temperature difference value TdL from the difference between the low-load temperature average value TiavL and a preset target temperature Tt in the room 80. The temperature difference value calculation unit 51 outputs the calculated high-load temperature difference value TdH and low-load temperature difference value TdL to the target index value update unit 55 and the airflow rate setting unit 90. The high-load temperature difference value TdH and the low-load temperature difference value TdL are also referred to as "temperature difference values ​​Td."

[0074] During cooling operation, the temperature difference value calculation unit 51 calculates the high-load temperature difference value TdH by subtracting the target temperature Tt from the high-load temperature average value TiavH, and calculates the low-load temperature difference value TdL by subtracting the target temperature Tt from the low-load temperature average value TiavL.On the other hand, during heating operation, the temperature difference value calculation unit 51 calculates the high-load temperature difference value TdH by subtracting the high-load temperature average value TiavH from the target temperature Tt, and calculates the low-load temperature difference value TdL by subtracting the low-load temperature average value TiavL from the target temperature Tt.

[0075] The current index value acquisition unit 53 acquires each index value for each of the indoor units 10a to 10i. That is, the current index value acquisition unit 53 acquires the current index value Ln, which is the current index value, from each of the indoor units 10a to 10i that are in operation. The current index value acquisition unit 53 also outputs the acquired current index value Ln to the target index value update unit 55, the average index value calculation unit 63, and the temperature management unit 65.

[0076] The target index value update unit 55 determines the level at which the output distributed from the outdoor unit 15 to the indoor units 10a to 10i, i.e., the index value, should be equalized for each group. In other words, it updates the high-load target index value LtH and the low-load target index value LtL, which are target values ​​of the index value required to achieve the target temperature Tt in the room 80. The high-load target index value LtH and the low-load target index value LtL are also referred to as "target index value Lt." The target index value update unit 55 includes an index difference value acquisition unit 57 and a target index value calculation unit 59.

[0077] The index difference value acquisition unit 57 acquires a high load index difference value ΔLH corresponding to the high load temperature difference value TdH based on the high load temperature difference value TdH calculated by the temperature difference value calculation unit 51 and a first table (see FIG. 3 described later) stored in the index value change amount storage unit 61 described later, and outputs the high load index difference value ΔLH to the target index value calculation unit 59. The index difference value acquisition unit 57 also acquires a low load index difference value ΔLL corresponding to the low load temperature difference value TdL based on the low load temperature difference value TdL calculated by the temperature difference value calculation unit 51 and the first table stored in the index value change amount storage unit 61, and outputs the low load index difference value ΔLL to the target index value calculation unit 59. The high load index difference value ΔLH and the low load index difference value ΔLL are also referred to as "index difference values ​​ΔL."

[0078] The target indicator value calculation unit 59 determines a new high load target indicator value LtH by adding the high load indicator difference value ΔLH acquired by the indicator difference value acquisition unit 57 to the high load reference indicator value LsH. The target indicator value calculation unit 59 also determines a new low load target indicator value LtL by adding the load indicator difference value ΔLL to the low load reference indicator value LsL. The high load reference indicator value LsH and the low load target indicator value LtL are also referred to as "reference indicator values ​​Ls."

[0079] The high load reference index value LsH is initially set to a high load average index value LnavH, which is the average value of the current index values ​​Ln of the high load indoor units 10H, from the average index value calculation unit 63. The low load reference index value LsL is initially set to a low load average index value LnavH, which is the average value of the current index values ​​Ln of the high load indoor units 10H, from the average index value calculation unit 63. A low-load average index value LnavL, which is the average value of the current index values ​​Ln of the machine 10L, is given. In other words, in the initial index value maintenance process, the high-load average index value LnavH is used as the high-load reference index value LsH. Also, the low-load average index value LnavL is used as the low-load reference index value LsL. The high-load average index value LnavH and the low-load average index value LnavL are also referred to as "average index values ​​Lnav."

[0080] In the second and subsequent index value maintenance processes for the high-load indoor unit 10H, the target index value calculation unit 59 itself uses the high-load target index value LtH that it used in the immediately preceding index value maintenance process as the high-load reference index value LsH. In addition, in the second and subsequent index value maintenance processes for the low-load indoor unit 10L, the target index value calculation unit 59 itself uses the low-load target index value LtL that it used in the immediately preceding index value maintenance process as the low-load reference index value LsL.

[0081] The average index value calculation unit 63 calculates LnavH, which is the average value of the current index values ​​Ln acquired from the high-load indoor units 10H, only during the first index value maintenance process after operation has started, and outputs this to the target index value calculation unit 59. In addition, the average index value calculation unit 63 calculates a low-load average index value LnavL, which is the average value of the current index values ​​Ln acquired from the low-load indoor units 10L, only during the first index value maintenance process after operation has started, and outputs this to the target index value calculation unit 59.

[0082] The temperature management unit 65 determines a high-load set temperature TsetH for each high-load indoor unit 10H based on the high-load target index value LtH calculated by the target index value update unit 55, and operates the high-load indoor unit 10H at the high-load set temperature TsetH. Also, the temperature management unit 65 determines a low-load set temperature TsetL for each low-load indoor unit 10L based on the low-load target index value LtL calculated by the target index value update unit 55, and operates the low-load indoor unit 10L at the low-load set temperature TsetL.

[0083] More specifically, the temperature management unit 65 includes a calculated index difference value calculation unit 67, a temperature change amount acquisition unit 69, a set temperature calculation unit 71, a set temperature change unit 73, and an index value maintenance unit 75.

[0084] The calculated index differential value calculation unit 67 subtracts the current index value Ln of each of the high-load indoor units 10H from the high-load target index value LtH calculated by the target index value calculation unit 59 to calculate a high-load calculation index differential value LdH, and outputs this to the temperature change amount acquisition unit 69. The calculated index differential value calculation unit 67 also subtracts the current index value Ln of each of the low-load indoor units 10L from the low-load target index value LtL calculated by the target index value calculation unit 59 to calculate a low-load calculation index differential value LdL, and outputs this to the temperature change amount acquisition unit 69. The high-load calculation index differential value LdH and the low-load calculation index differential value LdL are also referred to as "calculated index differential values ​​Ld."

[0085] The temperature change amount acquisition unit 69 acquires a high-load temperature change amount ΔTH corresponding to the high-load calculation index difference value LdH calculated by the calculation index difference value calculation unit 67 and a second table (see FIG. 4 described later) stored in the set temperature change amount storage unit 77, which will be described later, and outputs the acquired high-load temperature change amount ΔTH to the set temperature calculation unit 71. Furthermore, the temperature change amount acquisition unit 69 acquires a low-load temperature change amount ΔTL corresponding to the low-load calculation index difference value LdL based on the low-load calculation index difference value LdL calculated by the calculation index difference value calculation unit 67 and a second table stored in the set temperature change amount storage unit 77, which will be described later, and outputs the acquired low-load temperature change amount ΔTL to the set temperature calculation unit 71. The high-load temperature change amount ΔTH and the low-load temperature change amount ΔTL are also referred to as "temperature change amount ΔT."

[0086] The set temperature calculation unit 71 adds the high-load temperature change amount ΔTH output from the temperature change amount acquisition unit 69 to the suction temperature Ti for each high-load indoor unit 10H to calculate the high-load set temperature TsetH for the high-load indoor unit 10H, and outputs this to the set temperature change unit 73. The set temperature calculation unit 71 also adds the low-load temperature change amount ΔTL output from the temperature change amount acquisition unit 69 to the suction temperature Ti for each low-load indoor unit 10L to calculate the low-load set temperature TsetL for each low-load indoor unit 10L. and outputs it to the set temperature changing unit 73. The high load set temperature TsetH and the low load set temperature TsetL are also referred to as "set temperatures Tset."

[0087] The set temperature changing unit 73 changes the set temperature by changing the set temperature for each high-load indoor unit 10H to the high-load set temperature TsetH calculated by the set temperature calculation unit 71. The set temperature changing unit 73 also changes the set temperature by changing the set temperature for each low-load indoor unit 10L to the low-load set temperature TsetL calculated by the set temperature calculation unit 71.

[0088] The index value maintaining unit 75 operates the high-load indoor units 10H at the high-load set temperature TsetH changed by the set temperature changing unit 73. This uniformly maintains the current index value Ln and the high-load target index value LtH for each high-load indoor unit 10H. The index value maintaining unit 75 also operates the low-load indoor unit 10L at the low-load set temperature TsetL changed by the set temperature changing unit 73. This uniformly maintains the current index value Ln and the low-load target index value LtL for each low-load indoor unit 10L.

[0089] Next, the index value change amount storage unit 61 will be described with reference to Fig. 3. Fig. 3 is a diagram showing the relationship between the temperature difference value Td and the index difference value ΔL.

[0090] The index value change amount storage unit 61 is a so-called memory that associates multiple temperature difference values ​​Td with an index difference value ΔL, which is the range of increase or decrease in the index value, and stores the associated values ​​for each of the multiple temperature difference values ​​Td. In this embodiment, as shown in Table 1, a range of multiple temperature difference values ​​Td is defined as one group, and the group is associated with the index difference value ΔL. This association is determined appropriately taking into consideration the rated capacity of the outdoor unit 15 or the desired power consumption. In this embodiment, the index difference value ΔL increases as the temperature difference value Td increases. Furthermore, the index difference value ΔL decreases as the temperature difference value Td decreases.

[0091] Next, the set temperature change amount storage unit 77 will be described with reference to Fig. 4. Fig. 4 is a diagram showing the relationship between the calculated index difference value Ld and the set temperature change amount ΔT.

[0092] The set temperature change amount storage unit 77 is a so-called memory that associates a plurality of calculated index difference values ​​Ld with set temperature change amounts ΔT, which are amounts of change in the set temperatures Ti of the indoor units 10a to 10i, and stores the calculated index difference values ​​Ld for each calculated index difference value Ld. Note that, in the second table, ranges of the calculated index difference values ​​Ld are grouped together, and these groups are associated with set temperature change amounts ΔT, just like the temperature difference values ​​Td in the first table. This association is determined appropriately taking into consideration the rated capacity of the outdoor unit 15 or the desired power consumption. In this embodiment, as the calculated index difference value Ld decreases, the set temperature change amount ΔT increases, and as the index difference value Ld increases, the set temperature change amount ΔT decreases.

[0093] Next, the configuration of the airflow rate setting unit 90 and its related configuration will be described with reference to Fig. 5. Fig. 5 is a functional block diagram showing the connection relationships of the components required for the airflow rate setting process. Note that, for ease of understanding, Fig. 5 omits the illustration of some of the components of the control unit 50 described with reference to Fig. 2 (for example, the target index value updating unit 55, the temperature management unit 65, etc.).

[0094] The control unit 50 includes, in addition to each component (e.g., the target index value update unit 55, the temperature management unit 65, etc.) including the airflow rate setting unit 90 shown in Figure 2, a classification information memory unit 87, a start-up fan memory unit 82, an airflow rate memory unit 84, and an airflow rate change amount memory unit 86.

[0095] The airflow rate setting unit 90 sets the airflow rate of the high-load fan 20H associated with the high-load indoor unit 10H based on the magnitude of the load of the high-load indoor unit 10H. This allows the high-load fan 20H to agitate the air in the room 80 and eliminate temperature variations. In other words, the airflow rate setting unit 90 When the difference between the target temperature Tt of the living room 80 and the suction temperature Ti is tending to increase, the airflow rate setting unit 90 sets the airflow rate of the high-load fan 20H to be larger than the current airflow rate. When the difference between the target temperature Tt of the living room 80 and the suction temperature Ti is tending to decrease, the airflow rate setting unit 90 sets the airflow rate of the high-load fan 20H to be smaller than the current airflow rate. More specifically, the airflow rate setting unit 90 includes a fan stop determination unit 81, a load difference value calculation unit 83, and an airflow rate determination unit 85.

[0096] The blower stop determination unit 81 references the classification information of the indoor units 10a-10i stored in the classification information storage unit 87, which will be described later, and stops all of the blowers 20j-20u if the indoor units 10a-10i are all low-load indoor units 10L. Note that the blower stop determination unit 81 does not necessarily have to stop all of the blowers 20j-20u. For example, the blower stop determination unit 81 may operate, at an appropriate airflow rate, the blowers 20j-20u corresponding to the indoor units 10a-10i, among the low-load indoor units 10L, that have the largest difference between the suction temperature Ti and the target temperature Tt.

[0097] The load difference value calculation unit 83 calculates the load difference value Tdd by subtracting the high-load differential temperature value TdH(n-1) of the previous air flow rate setting process from the high-load differential temperature value TdH(n) of the current air flow rate setting process. Here, (n) is an arbitrary integer and indicates the number of times the air flow rate setting process has been performed since the air conditioning system 100 started operating. For example, n = 1 means the high-load differential temperature value TdH calculated in the first air flow rate setting process since the air conditioning system 100 started operating. Furthermore, n = 2 means the high-load differential temperature value TdH calculated in the second air flow rate setting process since the air conditioning system 100 started operating.

[0098] The airflow rate determination unit 85 determines whether an indoor unit classified as a high-load indoor unit 10H in the previous airflow rate setting process is the same as an indoor unit classified as a high-load indoor unit 10H in the current airflow rate setting process, based on the classification information of the indoor units 10a-10i stored in the classification information storage unit 82, which will be described later. Specifically, for example, it is assumed that the airflow rate determination unit 85 classified indoor units 10g-10i as high-load indoor units 10H in the previous airflow rate setting process. If the airflow rate determination unit 85 classifies indoor units 10g-10i as high-load indoor units 10H in the current airflow rate setting process, it determines that there is "no change" in the high-load indoor unit 10H. On the other hand, if the airflow rate determination unit 85 classifies, for example, indoor unit 10a and indoor units 10g-10i as high-load indoor units 10H in the current airflow rate setting process, it determines that there is "a change" in the high-load indoor unit 10H.

[0099] The airflow rate determining unit 85 determines the airflow rates of the fans 20j to 20u using two methods.

[0100] In the first method, when the combination of indoor units classified in the previous and current airflow rate setting processes is the same, the airflow rate determination unit 85 increases, decreases, or maintains the airflow rate of the high-load fan 20H from the airflow rate set in the previous airflow rate setting process based on the load difference value Tdd. In other words, when there is a "change" in the combination of high-load indoor units 10H, the airflow rate determination unit 85 increases, decreases, or maintains the airflow rate of the high-load fan 20H from the airflow rate set in the previous airflow rate setting process based on the load difference value Tdd. More specifically, when the load difference value Tdd is positive, the airflow rate determination unit 85 sets the airflow rate of the high-load fan 20H to a value greater than the airflow rate set in the previous airflow rate setting process. On the other hand, when the load difference value Tdd is negative, the airflow rate determination unit 85 sets the airflow rate of the high-load fan 20H to a value smaller than the airflow rate set in the previous airflow rate setting process. When the load difference value is 0, the airflow rate determined in the previous airflow rate setting process is maintained. In other words, when the indoor unit classified as a high-load indoor unit 10H in the previous airflow rate setting process and the indoor unit classified as a high-load indoor unit 10H in the current airflow rate setting process are the same, the airflow rate determination unit 85 sets the airflow rate of the high-load fan 20H based on the load difference value Tdd and the airflow rate change amount storage unit 86, which will be described later.

[0101] As a second method, when the combinations of indoor units classified in the previous and current airflow rate setting processes are not the same, or when this is the first time the airflow rate setting process is being performed, the airflow rate determination unit 85 determines the airflow rate of the high-load fan 20H based on the high-load differential temperature value TdH. In other words, when there is "no change" in the high-load indoor unit 10H, the airflow rate determination unit 85 determines the airflow rate of the high-load fan 20H based on the high-load differential temperature value TdH. Specifically, the larger the high-load differential temperature value TdH, the larger the airflow rate of the high-load fan 20H is set to be, and the smaller the high-load differential temperature value TdH, the smaller the airflow rate of the high-load fan 20H is set to be. In other words, the airflow rate determination unit 85 sets the airflow rate of the high-load fan 20H based on the high-load differential temperature value TdH and the airflow rate storage unit 84, which will be described later.

[0102] Next, the classification information storage unit 87 will be described with reference to Fig. 6. Fig. 6 is a diagram showing changes over time in the classification information of the indoor units.

[0103] The classification information storage unit 87 is a so-called memory that stores whether the indoor units 10a-10i have been classified as high-load indoor units 10H or low-load indoor units 10L by the indoor unit classification unit 54, as shown in the third table of Fig. 6. In other words, the classification information storage unit 87 stores whether the classification of the indoor units 10a-10i has changed between the previous and current air flow rate setting processes. Specifically, if the indoor unit 10a was classified as a low-load indoor unit 10L in the previous air flow rate setting process and the indoor unit 10a is similarly classified as a low-load indoor unit 10L in the current air flow rate setting classification process, the classification of the indoor unit 10a is stored as "no change."

[0104] Next, the activated fan storage unit 82 will be described with reference to Fig. 7. Fig. 7 is a diagram showing the combinations of corresponding fans 20j to 20u and indoor units 10a to 10i.

[0105] As shown in the fourth table of FIG. 7, the activated fan storage unit 82 is a so-called memory that stores the indoor units 10a-10i corresponding to each fan 20j-20u in association with the corresponding fan. Specifically, the activated fan storage unit 82 stores combinations of fans and indoor units where the distance between the fan and the indoor unit is shorter than a predetermined distance. For example, if the predetermined distance is [3] and the distance between the fan 20j and the indoor unit 10a is [2], the activated fan storage unit 82 stores the combination of the fan 20j and the indoor unit 10a as a corresponding combination. In other words, if the distance between the fan 20j and the indoor unit 10b is [4], the combination of the fan 20j and the indoor unit 10b is not considered to be a corresponding combination. Furthermore, multiple indoor units 10a-10i may be associated with each fan 20j-20u. In this embodiment, for example, the indoor unit 10a and the indoor unit 10b are associated with the fan 20k.

[0106] Next, the airflow rate storage unit 84 will be described with reference to Fig. 8. Fig. 8 is a diagram showing the relationship between the high load temperature difference value TdH and the airflow rate S.

[0107] The airflow rate storage unit 84 is a so-called memory that associates a plurality of high-load differential temperature values ​​TdH with the airflow rate S of the blower, and stores the associations for each high-load differential temperature value TdH. Specifically, as shown in the fifth table of FIG. 8, a range of a plurality of high-load differential temperature values ​​TdH is defined as one group, and the group is associated with the airflow rate S. In this embodiment, the smaller the high-load differential temperature value TdH, the smaller the airflow rate S is set. Also, the larger the high-load differential temperature value TdH, the larger the airflow rate S is set. The magnitude relationship of the airflow rates S is strong > medium > weak > weak. Also, the association between the high-load differential temperature value TdH and the airflow rate S may be determined appropriately taking into consideration various circumstances. Such various circumstances include, for example, the size of the room in which the blowers 20j-20u are installed, or the number or arrangement of the blowers 20j-20u.

[0108] Next, the airflow rate change amount storage unit 86 will be described with reference to Fig. 9. Fig. 9 is a diagram showing the relationship between the load difference value Tdd and the airflow rate change amount ΔS.

[0109] The airflow rate change storage unit 86 is a so-called memory that associates multiple load difference values ​​Tdd with airflow rate change amounts ΔS of the blower, and stores the associations for each load difference value Tdd. Specifically, as shown in the sixth table of FIG. 9, the airflow rate change storage unit 86 associates multiple ranges of load difference values ​​Tdd as one group with the airflow rate change amounts ΔS. In this embodiment, when the load difference value Tdd is positive, the airflow rate of the high-load blower 20H is stored to be larger than the current airflow rate. Note that in the range [0]≦Tdd<[1.0], the airflow rate change amount ΔS is set to [0], i.e., the current value is maintained. Also, when the load difference value Tdd is negative, the airflow rate of the high-load blower 20H is stored to be smaller than the current airflow rate. Note that the association between the load difference value Tdd and the airflow rate change amounts ΔS may be determined appropriately taking various circumstances into consideration. The various circumstances include, for example, the size of the room in which the fans 20j to 20u are installed, or the number or arrangement of the fans 20j to 20u.

[0110] The configuration of the air conditioning system 100 is as described above.

[0111] Next, the operation of the air conditioning system 100 will be described with reference to Figs. 10 to 14. Fig. 10 is a flow diagram showing the overall operation of the air conditioning system 100. Fig. 11 is a flow diagram showing the initial condition setting process. Fig. 12 is a flow diagram showing the air flow rate setting process. Fig. 13 is a flow diagram showing the target index value update process. Fig. 14 is a flow diagram showing the set temperature update process. Here, in the flow charts, numbers are assigned starting with the initial letter S. For example, S1 indicates a processing step. However, the magnitude of the numerical value indicating the processing step does not affect the processing order.

[0112] First, the control flow of the entire air conditioning system 100 will be described using Figure 10. The control unit 50 executes an initial condition setting process S100, an airflow rate setting process S150, a target index value maintenance process S200, and a set temperature update process S300. The control unit 50 also repeatedly executes the airflow rate setting process S150, the target index value update process S200, and the set temperature update process S300 every 10 minutes. The target index value update process S200 and the set temperature update process S300 are collectively referred to as "index value maintenance process."

[0113] The initial condition setting process S100 is a process for acquiring and calculating parameters required to execute the index value maintenance process.

[0114] The airflow rate setting process S150 is a process for agitating the air in the living room 80 and suppressing temperature unevenness in the living room 80 by controlling the airflow rates of the fans 20j to 20u.

[0115] The target index value update process S200 is a process for calculating the degree to which the index values ​​of the indoor units 10a to 10i should be evenly allocated, that is, the target index value Lt, which is the target value for the index values. In other words, the target index value update process S200 is a process for updating the high-load target index value LtH of the high-load indoor unit 10H and the low-load target index value LtL of the low-load indoor unit 10L, to bring the room temperature of the room 80 closer to the target temperature Tt.

[0116] The set temperature update process S300 is a process for changing the set temperature of the high-load indoor unit 10H so that the high-load indoor unit 10H operates at the high-load target index value LtH determined in the target index value update process S200. Similarly, the set temperature update process S300 is a process for changing the set temperature of the low-load indoor unit 10L so that the low-load indoor unit 10L operates at the low-load target index value LtL determined in the target index value update process S200.

[0117] The control unit 50 repeatedly performs the airflow amount setting process S150 and the index value maintenance process to operate the indoor units 10a to 10i in a state in which the current index values ​​Ln of the indoor units 10a to 10i match the target index values ​​Lt.

[0118] By executing the above process, the output of the outdoor unit to each indoor unit is evenly allocated to each indoor unit. This prevents the output of some indoor units from increasing relatively, which would result in a deterioration in energy consumption efficiency. As a result, it is possible to reduce the energy consumption of the air conditioning system 100. Furthermore, by controlling the airflow rate of the fans 20j to 20u using the airflow rate setting process S150, temperature variations in the living room 80 are suppressed.

[0119] When the user sets the target temperature Tt in the living room 80 to, for example, 26°C and starts operation of the air conditioning system 100, the set temperatures of the indoor units 10a-10i are set to the target temperature Tt (26°C). After the target temperature Tt is set, the control unit 50 executes the initial condition setting process S100. Here, as an example, it is assumed that the air conditioning system 100 performs cooling operation in the summer. Furthermore, as the state of the living room 80 (see FIG. 1) immediately before the cooling operation starts, the room temperatures of the spaces 80a-80c located farthest from the window 97 are 28°C. The room temperatures of the spaces 80d-80f located in the middle are 29°C. Furthermore, the room temperatures of the spaces 80g-80i located on the window 97 side are 30°C.

[0120] When the initial condition setting process S100 is executed, as shown in Fig. 11, the current index value acquisition unit 53 acquires the current index values ​​Ln(a) to Ln(i) for each of the indoor units 10a to 10i from the indoor units 10a to 10i (S101). Specifically, the current index values ​​Ln(a) to Ln(c) acquired from the indoor units 10a to 10c are set to [8]. The current index values ​​Ln(d) to Ln(f) acquired from the indoor units 10d to 10f are set to

[10] . The current index values ​​Ln(g) to Ln(i) acquired from the indoor units 10g to 10i are set to

[12] .

[0121] Next, the current index value acquisition unit 53 outputs each acquired current index value Ln to the average index value calculation unit 63. The average index value calculation unit 63, which has received each current index value Ln, calculates the current index value average value Lnav, which is the average value of the current index values ​​Ln of the indoor units 10a to 10i (S102). Specifically, Lnav=

[10] is calculated from the above-mentioned Ln(a) to Ln(i).

[0122] Next, when the airflow rate setting process S150 is executed, the suction temperature difference calculation unit 52 acquires the suction temperatures Ti, which are the temperatures of the air drawn into the indoor units 10a to 10f, from the temperature acquisition units 30a to 30f (S151), as shown in Fig. 12. Specifically, Ti(a) to Ti(c) = 28°C, Ti(d) to Ti(f) = 29°C, and Ti(g) to Ti(i) = 30°C.

[0123] Next, the suction temperature difference calculation unit 52 calculates the suction temperature difference Tid, which is the temperature difference between the suction temperature Ti and the room target temperature Tt, for each of the indoor units 10a to 10i, and outputs this to the indoor unit classification unit 54 (S152). Specifically, since the target temperature Tt is 26°C and Ti(a) to Ti(c) are 28°C, Tid(a) to Tid(c) are 2°C. Furthermore, since Ti(d) to Tid(f) are 29°C, Tid(d) to Tid(f) are 3°C. Furthermore, since Ti(g) to Tid(i) are 30°C, Tid(g) to Tid(i) are 4°C.

[0124] Next, if the suction temperature difference Tid for each of the indoor units 10a to 10i is equal to or greater than a predetermined threshold, the indoor unit classification unit 54 classifies the indoor unit as a high-load indoor unit 10H, and if it is less than the predetermined threshold, classifies the indoor unit as a low-load indoor unit 10L (S153). In this embodiment, the predetermined threshold is set to 3.5°C. That is, since Tid(a) to Tid(c) = 2°C and Tid(d) to Tid(f) = 3°C, the indoor units 10a to 10f are classified as low-load indoor units 10L (S155). Furthermore, since Tid(g) to Tid(i) = 4°C, the indoor units 10g to 10i are classified as high-load indoor units 10H (S154).

[0125] In addition, the airflow volume setting process S150 is performed every predetermined time (every 10 minutes in this embodiment). By performing the above, it is possible to optimize the classification of the indoor units 10a to 10i depending on the situation. For example, if a heat-generating device such as a personal computer is installed in the space 80a, the indoor unit 10a can be classified as a high-load indoor unit 10H when the personal computer is in use, and as a low-load indoor unit 10L when the personal computer is not in use.

[0126] With this configuration, it is possible to suppress temperature variations while continuously reducing energy consumption even if factors arise that change the temperature distribution in room 80. In addition to the heat-generating devices, other factors that can change the temperature distribution include changes in the amount of sunlight or crowding of people.

[0127] Once the indoor unit classification section 54 has completed classification of all of the indoor units 10a to 10i, the classification information storage section 87 stores whether the indoor units 10a to 10i have been classified as high-load indoor units 10H or low-load indoor units 10L.

[0128] Next, the fan stop determination unit 81 determines whether all of the indoor units 10a-10i are low-load indoor units 10L based on the classification information of the indoor units 10a-10i stored in the classification information storage unit 87 (S157). If all of the indoor units 10a-10i are classified as low-load indoor units 10L, the fan stop determination unit 81 stops the operation of the fans 20j-20u or maintains the stopped state (S158).

[0129] With this configuration, fans 20j to 20u can be operated only when temperature variations occur in room 80. In other words, when temperature variations do not occur, operation of fans 20j to 20u is stopped. In other words, by operating fans 20j to 20u only when air agitation by fans 20j to 20u is effective, it is possible to reduce energy consumption.

[0130] If there is an indoor unit classified as a high-load indoor unit 10H, the temperature difference value calculation unit 51 calculates the high-load temperature average value TiavH, which is the average value of the suction temperatures Ti of the indoor units 10a to 10i that belong to the high-load indoor unit 10H (S159). Specifically, from the above Ti(a) to Ti(i), TiavH = 30°C.

[0131] Next, the temperature difference value calculation unit 51 calculates the high load temperature difference value TdH by subtracting the target temperature Tt from the calculated high load temperature average value TiavH (S160). Specifically, since TiavH=30°C and Tt=26°C, TdH=4°C.

[0132] Next, the airflow rate determination unit 85 determines whether there has been a change in the combination of high-load indoor units 10H between the previous airflow rate setting process S150 and the current airflow rate setting process S150, based on the classification information of the indoor units 10a-10i stored in the classification information storage unit 87. If the airflow rate determination unit 85 determines that there has been a change in the high-load indoor units 10H, or in the case of the initial airflow rate setting process S150, the airflow rate determination unit 85 determines the airflow rate of the high-load fan 20H based on the high-load differential temperature value TdH and the airflow rate storage unit 84. Specifically, the airflow rate determination unit 85 determines the airflow rates of the fans 20r-20u corresponding to the indoor units 10g-10i belonging to the high-load indoor unit 10H, based on the high-load differential temperature value TdH and the airflow rate storage unit 84. More specifically, the airflow rate determination unit 85 sets the airflow rate S of the fans 20r to 20u to "medium" based on the fifth table (see FIG. 8) stored in the airflow rate storage unit 84 and the high load differential temperature value TdH=4°C.

[0133] The specific processing (S163, S164) to be performed when the airflow amount determination section 85 determines that there is "no change" in the high-load indoor unit 10H will be described later.

[0134] Next, when the target index value update process S200 is executed, the current index is updated as shown in FIG. The value acquisition unit 53 acquires the current index value Ln for each of the indoor units 10a to 10i (S202). Specifically, the current index values ​​Ln(a) to Ln(c) acquired from the indoor units 10a to 10c are set to [8]. The current index values ​​Ln(b) to Ln(d) acquired from the indoor units 10b to 10d are set to

[10] . The current index values ​​Ln(g) to Ln(i) acquired from the indoor units 10g to 10i are set to

[12] .

[0135] Next, the temperature difference value calculation unit 51 acquires the suction temperatures Ti of the indoor units 10a to 10i from the temperature acquisition units 30a to 30i (S201). Specifically, Ti(a) to Ti(c) = 28°C, Ti(d) to Ti(f) = 29°C, and Ti(g) to Ti(i) = 30°C.

[0136] Next, the temperature difference value calculation unit 51 calculates a high-load temperature average value TiavH, which is the average temperature of the suction temperatures Ti of the indoor units 10g-10i belonging to the high-load indoor unit 10H, and a low-load temperature average value TiavL, which is the average value of the suction temperatures Ti of the indoor units 10a-10f belonging to the low-load indoor unit 10L (S202). Specifically, TiavH=30°C, and TiavL=28.5°C.

[0137] Next, the temperature difference value calculation unit 51 calculates the high-load temperature difference value TdH by subtracting the target temperature Tt from the high-load temperature average value Tiav (S203). Similarly, it calculates the low-load temperature difference value TdH by subtracting the target temperature Tt from the low-load temperature average value TiavL. Specifically, since the target temperature Tt = 26°C, the high-load temperature difference value TdH = 4°C and the low-load temperature difference value TdL = 2.5°C.

[0138] Next, the index difference value acquisition unit 57 acquires a high load index difference value ΔLH corresponding to the high load temperature difference value TdH (=4°C) from the first table (see FIG. 3) stored in the index value change amount storage unit 61 (S204). Similarly, the index difference value acquisition unit 57 acquires a low load index difference value ΔLL corresponding to the low load temperature difference value TdL (=2.5°C) from the first table (see FIG. 3) stored in the index value change amount storage unit 61 (S204). Specifically, the high load index difference value ΔLH=+2.5, and the low load index difference value ΔLL=+1.0.

[0139] Next, the average index value calculation unit 63 calculates a high-load average index value LnavH, which is the average value of the current index values ​​Ln(g) to Ln(i) of the indoor units belonging to the high-load indoor unit 10H (S205). Similarly, the average index value calculation unit 63 calculates a low-load average index value LnavL, which is the average value of the current index values ​​Ln(a) to Ln(f) of the indoor units belonging to the low-load indoor unit 10L (S205). Specifically, since Ln(g) to Ln(i) =

[12] , the high-load average index value LnavH =

[12] , and since Ln(a) to Ln(c) = [8] and Ln(d) to Ln(f) =

[10] , the low-load average index value LnavL = [9]. Note that the calculation of the high-load average index value LnavH and the low-load average index value LnavL by the average index value calculation unit 63 need only be performed at least during the first index value update process.

[0140] Next, the target indicator value calculation unit 59 adds the high load indicator difference value ΔLH to the high load average indicator value LnavH calculated by the average indicator value calculation unit 63 to determine a new high load target indicator value LtH (S206). Similarly, the target indicator value calculation unit 59 adds the low load indicator difference value ΔLL to the low load average indicator value LnavL calculated by the average indicator value calculation unit 63 to determine a new low load target indicator value LtL (S206). Specifically, since LnavH=

[12] and ΔLH=+2.5, the high load target indicator value LtH=[14.5], and since LnavL=[9] and ΔLL=+1.0, the low load target indicator value LtL=

[10] .

[0141] Next, when the set temperature update process S300 is executed, as shown in Fig. 14, the current index value acquisition unit 53 acquires the current index values ​​Ln of the indoor units 10a to 10i (S301). Specifically, Ln(a) to Ln(c) = [8]. Furthermore, Ln(b) to Ln(d) =

[10] . Furthermore, Ln(g) to Ln(i) =

[12] .

[0142] Next, the calculation index differential value calculation unit 67 subtracts the current index value Ln(g)-Ln(i) for each high-load indoor unit 10H from the high-load target index value LtH, and calculates a high-load calculation index differential value LdH(g)-LdH(i) for each high-load indoor unit 10H (S302). Similarly, the calculation index differential value calculation unit 67 subtracts the current index value Ln(g)-Ln(i) for each low-load indoor unit 10L from the low-load target index value LtL, and calculates a high-load calculation index differential value LdH(g)-LdH(i) for each high-load indoor unit 10H (S302). Specifically, the high-load target index value LtH=[14.5] and the current index values ​​Ln(g)-Ln(i)=

[12] , so the high-load calculation index differential value LdH(g)-LdH(i)=[2.5]. Furthermore, since the low load target index value LtL =

[10] and the current index values ​​Ln(a) to Ln(c) = [8], the low load calculation index difference values ​​LdL(a) to LdL(c) = [2.0]. Furthermore, since the low load target index value LtL =

[10] and the current index values ​​Ln(d) to Ln(f) =

[10] , the low load calculation index difference values ​​LdL(d) to LdL(f) = [0].

[0143] Next, the temperature change amount acquisition unit 69 acquires the high-load set temperature change amounts ΔTH(g) to ΔTH(i) for each high-load indoor unit 10H based on the calculated high-load calculation index difference value LdH and the second table (see FIG. 4) stored in the set temperature change amount storage unit 77 (S303). Similarly, the temperature change amount acquisition unit 69 acquires the low-load set temperature change amounts ΔTL(a) to ΔTL(f) for each low-load indoor unit 10L based on the calculated low-load calculation index difference value LdL and the second table stored in the set temperature change amount storage unit 77 (S303). Specifically, since the high-load calculation index difference values ​​LdH(g) to LdH(i) = [2.5], the high-load set temperature change amounts ΔTH(g) to ΔTH(i) = -1.5°C. Furthermore, since the low load calculation index difference values ​​LdL(a) to LdL(c) = [2.0], the low load setting temperature change amounts ΔTL(a) to ΔTL(c) = -1.5°C. Furthermore, since the low load calculation index difference values ​​LdH(d) to LdH(f) = [0], the low load setting temperature change amounts ΔTL(d) to ΔTL(f) = -0.5°C.

[0144] Next, the set temperature calculation unit 71 adds the acquired high-load set temperature changes ΔTH(g) to ΔTH(i) to the suction temperatures Ti(g) to Ti(i) of the corresponding high-load indoor units 10H to calculate new high-load set temperatures TsetH(g) to TsetH(i) for each high-load indoor unit 10H (S304). The set temperature calculation unit 71 also adds the acquired low-load set temperature changes ΔTL(a) to ΔTL(f) to the suction temperatures Ti(a) to Ti(f) of the corresponding low-load indoor units 10L to calculate new low-load set temperatures TsetL(a) to TsetL(f) for each low-load indoor unit 10L (S304). Specifically, since Ti(g) to Ti(i) = 30°C and ΔTH(g) to ΔTH(i) = -1.5°C, TsetH(g) to TsetH(i) = 28.5°C. Furthermore, since Ti(a) to Ti(c) = 28°C and ΔTL(a) to ΔTL(c) = -1.5°C, TsetL(a) to TsetL(c) = 26.5°C. Furthermore, since Ti(d) to Ti(f) = 29°C and ΔTL(d) to ΔTL(f) = -0.5°C, TsetL(d) to TsetL(f) = 28.5°C.

[0145] Next, the set temperature changing unit 73 transmits the calculated new high-load set temperatures TsetH(g) to TsetH(i) to the corresponding high-load indoor units 10H (S305). Similarly, the set temperature changing unit 73 transmits the calculated new low-load set temperatures TsetL(a) to TsetL(f) to the corresponding low-load indoor units 10L (S305).

[0146] Next, the index value maintaining unit 75 controls the indoor units 10g to 10i belonging to the high-load indoor unit 10H to operate at the corresponding high-load set temperatures TsetH(g) to TsetH(i). As a result, the index value maintaining unit 75 maintains the operation of the indoor units 10g to 10i in a state where the current index values ​​Ln(g) to Ln(i) of the indoor units 10g to 10i match the high-load target index value LtH. In other words, the high-load set temperatures TsetH(g) to TsetH(i) are controlled. As a result, each index value for each high-load indoor unit 10H coincides with the high-load target index value LtH.

[0147] Furthermore, the index value maintenance unit 75 controls the indoor units 10a to 10f belonging to the low-load indoor unit 10L to operate at the corresponding low-load set temperatures TsetL(a) to TsetL(f). As a result, the index value maintenance unit 75 maintains the operation of the indoor units 10a to 10f in a state where the current index values ​​Ln(a) to Ln(f) of the indoor units 10a to 10f match the low-load target index value LtL. In other words, as a result of controlling the low-load set temperatures TsetL(a) to TsetL(f), each index value for each low-load indoor unit 10L matches the low-load target index value LtL.

[0148] The above is a description of the initial condition setting process S100, the airflow rate setting process S150, the index value update process S200, and the set temperature update process S300 that are performed after the air conditioning system 100 starts operating.

[0149] Next, the second and subsequent airflow rate setting processes S150 will be described using the second airflow rate setting process S150 as an example, but explanations of content that is similar to the first process will be omitted or simplified. It is assumed that in S153 of the second airflow rate setting process S150, the indoor units 10a-10f are classified as low-load indoor units 10L, and the indoor units 10g-10i are classified as high-load indoor units 10H (see FIG. 6). It is also assumed that in S160 of the second airflow rate setting process S150, a high-load differential temperature value TdH=3°C is calculated.

[0150] 12, if the airflow rate determination unit 85 determines that there is "no change" in the combination of high-load indoor units 10H, the load difference value calculation unit 83 calculates the load difference value Tdd from the change over time in the high-load temperature difference value TdH. Specifically, the load difference value Tdd is calculated by subtracting the high-load temperature difference value TdH(n-1) calculated in the previous (first) airflow rate setting process S150 from the high-load temperature difference value TdH(n) calculated in the current (second) airflow rate setting process S150 (S163). Here, if the high-load temperature difference value TdH(n)=3°C and the high-load temperature difference value TdH(n-1)=4°C, then the load difference value Tdd=-1°C.

[0151] Next, the airflow rate determination unit 85 increases, decreases, or maintains the airflow rate of the high-load fan 20H based on the calculated load difference value Tdd and the sixth table (see FIG. 9) stored in the airflow rate change amount storage unit 86. Specifically, when Tdd=−1°C, the airflow rate of the high-load fan 20H (fans 20r to 20u) is “decreased by one level.” That is, since the airflow rates of the fans 20r to 20u set in the previous airflow rate setting process S150 were “medium,” the airflow rate is changed to “weak.” In other words, since the temperature variation in the living room 80 is decreasing, the airflow rate determination unit 85 reduces energy consumption by decreasing the airflow rate. In other words, if the temperature variation is increasing, the airflow rate determination unit 85 increases the airflow rate of the high-load fan 20H, for example, from “medium” to “strong,” to suppress the temperature variation and thereby reduce discomfort caused by the temperature variation. Furthermore, by suppressing temperature variations in the living room 80, it becomes easier to allocate output to the indoor units 10a to 10i evenly, and the index values ​​of the indoor units 10a to 10i can be made to match the target index value Lt quickly. In other words, after the air conditioning system 100 is started, it is possible to shorten the time during which some of the indoor units operate with extremely high output, which means that operation that reduces energy consumption quickly becomes possible.

[0152] Through the above process, the index values ​​of the indoor units 10a to 10i, i.e., the output from the outdoor unit 15 to the indoor units 10a to 10i, are evenly allocated. This prevents the output of only some of the indoor units from increasing, and reduces deterioration in energy consumption efficiency. As a result, an air conditioning system 100 is provided that can reduce the energy consumption of the air conditioning system. (Embodiment 2) In the first embodiment, an example of the index value maintenance process during cooling operation has been described. In the following, an example of the index value maintaining process and the fan air volume determining process during heating operation will be described. Note that the description of the same processes as those in the first embodiment will be omitted or simplified.

[0153] In the target index value update process S200 and the airflow rate setting process S150 during heating operation, the temperature difference value calculation unit 51 calculates a high-load temperature difference value TdH by subtracting a high-load temperature average value TiavH, which is the average value of the suction temperatures Ti of the high-load indoor units 10H, from the preset target temperature Tt in the room 80. The temperature difference value calculation unit 51 also calculates a low-load temperature difference value TdL by subtracting a low-load temperature average value TiavL, which is the average value of the suction temperatures Ti of the low-load indoor units 10L, from the preset target temperature Tt in the room 80.

[0154] Furthermore, the set temperature calculation unit 71 subtracts the high-load temperature change amount ΔTH output from the temperature change amount acquisition unit 69 from the suction temperature Ti of the high-load indoor unit 10H to calculate the high-load set temperature TsetH of the high-load indoor unit 10H. Furthermore, the set temperature calculation unit 71 subtracts the low-load temperature change amount ΔTL output from the temperature change amount acquisition unit 69 from the suction temperature Ti of the low-load indoor unit 10L to calculate the low-load set temperature TsetL of the low-load indoor unit 10L. Other processing is the same as in the first embodiment.

[0155] By performing the above-described process, it is possible to reduce the energy consumption of the air conditioning system 100 even during heating operation. (Variation) In the air conditioning system 100 according to the first and second embodiments, the target index value update process (S200) and the set temperature change process (S300) are repeatedly performed every 10 minutes. However, a process of repeating only the set temperature change process (S300) may be added. Specifically, the set temperature change process (S300) may be repeated every minute, for example.

[0156] By adopting such a configuration, it is possible to operate the indoor units 10a to 10i with higher accuracy at the target index value Lt, and as a result, it is possible to provide an air conditioning system 100 that can reduce power consumption.

[0157] Furthermore, in the air conditioning systems 100 according to the first and second embodiments, examples have been shown in which the target index value update process S200 and the set temperature update process S300 are performed when a temperature difference occurs within the same space. However, the air conditioning system 100 may also be configured to air-condition spaces in which there is almost no temperature difference within the same space, such as basements or highly insulated spaces without windows. [Industrial Applicability]

[0158] It can be widely used in air conditioning systems that have multiple indoor units in the same space. [Explanation of symbols]

[0159] 10 Indoor unit group 10a, 10b, 10c, 10d, 10e, 10f, 10g, 10h, 10i indoor unit 10H High load indoor unit 10L low load indoor unit 15 Outdoor unit 20j, 20k, 20l, 20m, 20n, 20o, 20p, 20q, 20r, 20s, 20t, 20u blower 25 Control section 30a, 30b, 30c, 30d, 30e, 30f, 30g, 30h, 30i Temperature acquisition section 50 control section 51 Temperature difference calculation unit 52 Intake temperature difference calculation unit 53 Current index value acquisition unit 54 Indoor unit classification section 55 Target index value update unit 57 Index difference value acquisition part 59 Target index value calculation unit 61 Index value change amount storage unit 63 Average index value calculation unit 65 Temperature control section 67 Calculation index difference value calculation unit 69 Temperature change amount acquisition unit 71 Set temperature calculation section 73 Temperature setting change section 75 Index value maintenance unit 77 Set temperature change amount memory section 80 Room 80a, 80b, 80c, 80d, 80e, 80f, 80g, 80h, 80i space 81 Blower stop judgment section 82 Start-up fan memory unit 83 Load differential value calculation unit 84 Air blowing amount memory section 85 Airflow volume determination unit 86 Airflow rate change amount memory unit 87 Classification information storage unit 94 First side wall 95 Second side wall 96 Third side wall 97 Windows 100 Air Conditioning System

Claims

1. An outdoor unit whose output can be controlled by temperature setting, a plurality of indoor units arranged in the same space and connected to the outdoor unit; a control unit that independently controls the set temperatures of the indoor units so as to evenly allocate the outputs to the indoor units; a plurality of fans that agitate the air in the same space; The control unit determining the air volume of the blower based on the magnitude of the load of a high-load indoor unit, which is an indoor unit with a relatively high load among the indoor units; Air conditioning system.

2. The control unit determining the airflow rate of a high-load fan that is a fan installed within a predetermined distance from the high-load indoor unit, based on the magnitude of the load of the high-load indoor unit; The air conditioning system of claim 1 .

3. a temperature acquisition unit that acquires suction temperatures, which are the temperatures of air drawn into the indoor units, The control unit using the suction temperature acquired by the temperature acquisition unit, when the difference between the target temperature of the same space and the suction temperature of the high-load indoor unit tends to increase, set the airflow rate of the high-load fan to be larger than the current airflow rate; When the difference between the target temperature and the suction temperature of the high-load indoor unit is tending to decrease, the airflow rate of the high-load fan is set to be smaller than the current airflow rate.

3. The air conditioning system of claim 2.

4. the control unit includes a suction temperature difference calculation unit, an indoor unit classification unit, a temperature difference value calculation unit, a load difference value calculation unit, and an airflow amount determination unit; The control unit an airflow rate setting process for changing the airflow rate of the air blower is executed at predetermined time intervals; The airflow rate setting process is as follows: The suction temperature difference calculation unit calculates a suction temperature difference, which is the difference between the suction temperature and the target temperature, for each indoor unit; the indoor unit classification unit classifies the indoor units into high-load indoor units in which the suction temperature difference is equal to or greater than a predetermined threshold, and low-load indoor units in which the suction temperature difference is smaller than a predetermined threshold; The differential temperature value calculation unit calculates a high-load temperature average value, which is an average value of the intake temperatures of the high-load indoor units, and the high-load differential temperature value, which is the difference between the high-load temperature average value and the target temperature; the load difference value calculation unit calculates a load difference value by subtracting the high-load temperature difference value calculated in the previous air flow rate setting process from the high-load temperature difference value calculated in the current air flow rate setting process; an airflow rate determination unit that increases or decreases the airflow rate of the high-load fan from the airflow rate set in the previous airflow rate setting process based on the load difference value; 4. The air conditioning system of claim 3.

5. The control unit When the load difference value is positive, the airflow rate of the fan is increased from the airflow rate set in the previous airflow rate setting process; If the load difference value is negative, the airflow rate of the blower is reduced from the airflow rate set in the previous airflow rate setting process; If the load difference value is 0, the airflow rate determined in the previous airflow rate setting process is maintained.

5. The air conditioning system of claim 4.

6. The control unit when the indoor unit classification unit classifies all of the indoor units as low-load indoor units, operation of the blower is stopped.

5. The air conditioning system of claim 4.

7. an airflow rate storage unit that stores the high-load temperature difference value and the airflow rate in association with each other; an airflow rate change amount storage unit that stores the load difference value and the airflow rate change amount in association with each other, The airflow amount determination unit If the indoor unit classified as the high-load indoor unit in the previous airflow rate setting process is the same as the indoor unit classified as the high-load indoor unit in the current airflow rate setting process, the airflow rate of the high-load fan is set based on the load difference value and the airflow rate change amount storage unit; If the indoor unit classified as the high-load indoor unit in the previous airflow rate setting process is not the same as the indoor unit classified as the high-load indoor unit in the current airflow rate setting process, or if this is the first airflow rate setting process, set the airflow rate of the high-load fan based on the high-load temperature difference value and the airflow rate storage unit.

5. The air conditioning system of claim 4.

8. The control unit an indoor unit classification unit that classifies the indoor units into high-load indoor units whose outputs should be relatively increased among the indoor units and low-load indoor units whose outputs should be reduced relative to the high-load indoor units; allocating the first output evenly to the high-load indoor units; The air conditioning system according to claim 1 , wherein a second output smaller than the first output is evenly allocated to the low-load indoor units.

9. The control unit an index value change amount storage unit that stores a plurality of differential temperature values ​​and an index difference value that indicates an increase or decrease range of an index value related to the output of the outdoor unit, in association with each of the differential temperature values; a temperature change amount storage unit that stores a plurality of the index difference values ​​and a temperature change amount, which is an amount of change in the set temperature of the indoor unit, in association with each of the index difference values; The control unit, as the index value maintenance process, a current index value acquisition unit acquires a current index value from the indoor unit that is in operation; a target index value update unit updates a high-load target index value, which is the index value corresponding to the first output of the high-load indoor unit, and a low-load target index value, which is the index value corresponding to the second output of the low-load indoor unit; a temperature management unit that changes the set temperature of the indoor unit; In the target index value update unit, The temperature difference value acquisition unit A high-load temperature average value which is the average value of the suction temperatures of the high-load indoor units; the high-load temperature difference value being the difference between the high-load temperature average value and the target temperature; A low load temperature average value which is the average value of the suction temperatures of the low load indoor units; Calculating a low-load temperature difference value, which is the difference between the low-load temperature average value and the target temperature; An index difference value acquisition unit acquiring a high load indicator difference value, which is the indicator difference value corresponding to the high load temperature difference value, based on the high load temperature difference value and the indicator value change amount storage unit; acquiring a low load indicator difference value, which is the indicator difference value corresponding to the low load temperature difference value, based on the low load temperature difference value and the indicator value change amount storage unit; The target index value calculation unit adding the acquired high load index difference value to the reference index value of the high load indoor unit to calculate the high load target index value of the high load indoor unit; adding the acquired low-load index difference value to the reference index value of the low-load indoor unit to calculate a low-load target index value for the low-load indoor unit; In the temperature control unit, A calculated index difference value calculation unit calculating a high-load calculated index difference value, which is a calculated index difference value obtained by subtracting the current index value of the high-load indoor unit from the high-load target index value; calculating a low-load calculated index difference value, which is a calculated index difference value obtained by subtracting the current index value of the low-load indoor unit from the low-load target index value; a temperature change amount acquisition unit acquires the temperature change amount corresponding to the calculated index difference value based on the calculated calculated index difference value and the temperature change amount storage unit; a set temperature calculation unit adding the acquired temperature change amount to the suction temperature of the indoor unit to calculate the set temperature of the indoor unit; a set temperature change unit changes the set temperature of the indoor unit to the set temperature calculated by the set temperature calculation unit, The index value maintaining unit operates the indoor unit at the set temperature changed by the set temperature changing unit, The current index value of the high-load indoor unit and the high-load target index value are maintained in a consistent state, The current index value and the low-load target index value of the low-load indoor unit are maintained in a consistent state.

9. The air conditioning system of claim 8.

Images