Air-conditioning control device, air-conditioning control system, and air-conditioning control method

Abstract

The invention relates to an air-conditioning control device, an air-conditioning control system, and an air-conditioning control method. In an integrated air conditioner, when a set temperature is changed in a power saving direction, energy saving is facilitated. An air-conditioning control device is provided with: an air-conditioning information acquisition unit that acquires air-conditioning information including the operating states of a plurality of indoor units, the thermal states of the indoor units, a set temperature, and a current room temperature; and a control instruction creation unit that, when switching the operating state of the air conditioner, adjusts the set temperature of the indoor unit, creates a control instruction including the adjusted set temperature, and transmits the created control instruction to a control instruction transmission unit of the indoor unit. When the operation state of the air conditioner is switched from a predetermined state to a power-saving state, the control instruction creation unit uses, as an exception, an indoor unit for which the difference between the set temperature and the current room temperature is inclined toward the reverse comfort side among the indoor units in the indoor unit hot-on state. An adjustment for changing the set temperature of the indoor unit, which does not conform to the exception, to a power-saving set temperature is performed.

Description

Technical Field

[0001] The present invention relates to an air conditioning control device, an air conditioning control system and an air conditioning control method for realizing energy saving by controlling an integrated air conditioner. Background Art

[0002] For example, in small and medium-sized buildings, most of the integrated air conditioners called building multi-split air conditioners / combination air conditioners are installed: the individual refrigerant pipes of multiple indoor units are integrated and connected with the common refrigerant pipes, and the refrigerant is compressed / circulated by the compressor installed in the outdoor unit with the common refrigerant pipe.

[0003] In an integrated air conditioner, a control temperature (thermal shut-off temperature) that stops the compressor and puts the outdoor unit in a thermal shut-off state and a control temperature (thermal start-up temperature) that starts the compressor and puts the outdoor unit in a thermal start-up state are set inside the air conditioner based on the set temperature. The air conditioning control is performed by adjusting the combination of the compressor speed and air volume to make the room temperature converge to the set temperature.

[0004] In such an integrated air conditioner, when the outdoor unit is in a thermal off state, the room temperature rises in cooling operation and decreases in heating operation. When the current room temperature of the air conditioner exceeds the thermal on temperature in cooling operation or is lower than the thermal on temperature in heating operation, the air conditioner restarts the compressor of the outdoor unit to enter the thermal on state of the outdoor unit. Here, when the compressor is restarted, a larger starting power is required compared to the stable operation.

[0005] In an integrated air conditioner, when the current room temperature of each of the multiple indoor units exceeds the set temperature, the valve provided at the connection portion between the individual refrigerant pipes and the common refrigerant pipe of the corresponding indoor unit is closed. This is called indoor unit thermal shutdown. When the valves of all indoor units are closed, the air conditioner controls the outdoor unit so that the thermal state is the outdoor unit thermal shutdown state.

[0006] When the heat-off state of the indoor unit continues and the current room temperature exceeds the heat-on temperature in cooling operation, or the current room temperature is lower than the heat-on temperature in heating operation, the valve of the corresponding indoor unit is opened. At this time, when the compressor of the outdoor unit is temporarily stopped, the air conditioner restarts the compressor.

[0007] Patent document 1 discloses the following technology: In an integrated air conditioner, in order to prevent an increase in power consumption associated with the stop / restart of the compressor, a situation in which the compressor is frequently stopped / restarted is detected, and the set temperature is changed according to the indoor unit, thereby staggering the transition timing from the heat-on state to the heat-off state of each of the multiple indoor units.

[0008] Patent Document 2 discloses a technique of detecting that all indoor units are about to enter a thermo-off state each time while monitoring the indoor temperature, and changing the thermo-off temperature and the thermo-on temperature in advance.

[0009] Prior art literature

[0010] Patent Document 1: Japanese Patent Application Publication No. 2012-154600

[0011] Patent Document 2: WO2016 / 016918 Summary of the invention

[0012] Problems to be solved by the invention

[0013] However, in the air conditioning control technologies of Patent Documents 1 and 2, in an integrated air conditioner, when the set temperature is changed in the direction of power saving, if the heat off temperature corresponding to the set temperature is higher than the current room temperature in cooling operation and lower than the current room temperature in heating operation, the outdoor unit thermal state is changed from the outdoor unit heat on state to the outdoor unit heat off state, and the compressor is stopped. Therefore, when the compressor is restarted, a large amount of power consumption is required compared to the stable operation, so there is a problem that the power saving intention may be violated.

[0014] In order to solve the above-mentioned problem, the purpose of the present invention is to provide an air-conditioning control device, an air-conditioning control system and an air-conditioning control method, in which in an integrated air-conditioning device in which a separate refrigerant piping of each of a plurality of indoor units is integrally connected to a common refrigerant piping of an outdoor unit having a compressor, it can help save energy even when the set temperature is changed in the direction of power saving.

[0015] Means for solving problems

[0016] In order to solve the above-mentioned problem, the air-conditioning control device of the present invention performs control to switch the operating state of an integrated air-conditioner in which a separate refrigerant pipe of each of a plurality of indoor units is integrally connected to a common refrigerant pipe of an outdoor unit having a compressor to a predetermined state or a power-saving state. The most important feature of the air-conditioning control device is that the air-conditioning control device comprises: an air-conditioning information acquisition unit, which acquires air-conditioning information including the operating state, indoor unit thermal state, set temperature, and current room temperature related to each of the plurality of indoor units; and a control instruction making unit, which adjusts the set temperature of the indoor unit when switching the operating state of the air-conditioner. And a control instruction including the adjusted set temperature is produced; and a control instruction sending unit, which sends the control instruction produced by the control instruction producing unit to the indoor unit, and the control instruction producing unit makes the following adjustments when switching the operating state of the air conditioner from the predetermined state to the power-saving state: among the indoor units whose thermal state is the indoor unit heat-on state, at least a specified number of indoor units that are inclined toward the anti-comfort side from the difference between the set temperature and the current room temperature are taken as exceptions, and the set temperature of the indoor units that do not meet the exception is changed to the set temperature of the power-saving state.

[0017] Effects of the Invention

[0018] According to the present invention, in an integrated air conditioner in which individual refrigerant pipes of each of a plurality of indoor units are integrally connected to a common refrigerant pipe of an outdoor unit having a compressor, energy saving can be achieved even when the set temperature is changed in the direction of power saving.

[0019] Problems, structures, and effects other than those described above will be described in detail in the following embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic configuration diagram functionally showing the outline of a first air conditioning control system according to a first embodiment of the present invention.

[0021] Figure 2 It is a hardware configuration diagram of the air conditioning control device according to the embodiment of the present invention.

[0022] Figure 3 It is conceptually expressed Figure 2 FIG. 1 is an explanatory diagram of the data structure of an air conditioner management table stored in a database included in the air conditioning control device shown.

[0023] Figure 4 This is a sequence diagram conceptually showing the operation process of a plurality of functional units when the air conditioner included in the first air conditioning control system of the first embodiment is caused to perform a cooling operation.

[0024] Figure 5A This is a flowchart for explaining the operation of the first air conditioning control device according to the first embodiment.

[0025] Figure 5B It is a timing chart for explaining the operation of the air conditioner included in the first air conditioning control system of the first embodiment.

[0026] Figure 6 This is a schematic configuration diagram functionally showing the outline of a second air-conditioning control system according to a second embodiment of the present invention.

[0027] Fig. 7A This is a flowchart for explaining the operation of the second air conditioning control device according to the second embodiment.

[0028] Figure 7B It is a timing chart for explaining the operation of the air conditioner included in the second air conditioning control system of the second embodiment.

[0029] Figure 8 This is a schematic configuration diagram functionally showing the outline of a third air-conditioning control system according to a third embodiment of the present invention.

[0030] Fig.9A This is a flowchart for explaining the operation of the third air conditioning control device according to the third embodiment.

[0031] Fig. 9B It is a timing chart for explaining the operation of the air conditioner included in the third air-conditioning control system of the third embodiment.

[0032] Fig.10 This is a schematic configuration diagram functionally showing the outline of a fourth air-conditioning control system according to a fourth embodiment of the present invention.

[0033] Fig.11A This is a flowchart for explaining the operation of the fourth air conditioning control device according to the fourth embodiment.

[0034] Fig. 11B This is a flowchart for explaining the operation of the fourth air conditioning control device according to the fourth embodiment.

[0035] Fig. 11C It is a timing chart for explaining the operation of the air conditioner included in the fourth air-conditioning control system of the fourth embodiment.

[0036] Fig.12 It is a timing chart for explaining the cooperative operation of the air conditioners included in the air conditioning control system of the comparative example. DETAILED DESCRIPTION

[0037] An air-conditioning control device, an air-conditioning control system, and an air-conditioning control method according to embodiments of the present invention will be described in detail with reference to appropriate drawings.

[0038] In the description of the air-conditioning control device and the power generation system control device according to the embodiments of the present invention, components having common functions are denoted by common reference numerals, and duplicate descriptions thereof are omitted.

[0039] [Schematic Structure of the First Air Conditioning Control System 1-1 of the First Embodiment]

[0040] First, refer to Figure 1 A schematic configuration of the first air conditioning control system 1 - 1 according to the first embodiment will be described.

[0041] Figure 1 1 is a schematic configuration diagram functionally showing the outline of the first air-conditioning control system 1 - 1 according to the first embodiment.

[0042] like Figure 1 As shown, the first air conditioning control system 1-1 of the first embodiment is configured such that the first air conditioning control device 11-1 of the first embodiment and the first building air conditioning system 13-1 are electrically connected via a communication medium 103 such as the Internet or a dedicated communication line in a manner that data can be exchanged. In the first embodiment, the first air conditioning control device 11-1 is set in a place different from the first building air conditioning system 13-1.

[0043] [Structure of the First Air Conditioning Control Device 11 - 1]

[0044] like Figure 1 As shown, the first air-conditioning control device 11-1 is based on the air-conditioning control device 11, and the air-conditioning control device 11 performs the following control: the operating state of the integrated air conditioner 50 in which the separate refrigerant piping 23a, 25a, 27a, 29a, 31a of each of the multiple indoor units 70 is integratedly connected with the common refrigerant piping 45 of the outdoor unit 60 having the compressor 63 is switched to a predetermined state or a power-saving state.

[0045] In detail, Figure 1 As shown, the first air conditioning control device 11 - 1 is configured to include a target power setting unit 51 , a power consumption acquisition unit 53 , an air conditioning information acquisition unit 55 , a control instruction creation unit 57 , and a control instruction transmission unit 59 .

[0046] The target power setting unit 51 has a function of setting a target power to be a target of power consumption. The target power setting unit 51 may set the target power in accordance with a power reduction instruction from a higher-level system such as a DR electrically connected via a communication medium.

[0047] Here, DR (Demand Response) refers to a structure that adjusts the power consumption of loads such as air conditioners 50 of equipment such as the first building air conditioning system 13-1 installed on the demand side according to the instructions of the power system manager and power retailers in order to achieve the stability of the power system by achieving a balance between local power demand and supply.

[0048] The power consumption acquisition unit 53 has a function of acquiring current power data of the air conditioner 50 belonging to the first building air conditioning system 13 - 1 via the smart meter 15 , the control terminal 17 , etc. The smart meter 15 and the control terminal 17 will be described in detail later.

[0049] The air conditioning information acquisition unit 55 has a function of acquiring air conditioning information including the operating state, set temperature, current room temperature, indoor unit thermal state, and protection state related to energy saving for each of the plurality of indoor units 70. The air conditioning information will be described in detail later.

[0050] The control instruction making unit 57 has a function of adjusting the set temperature of each of the plurality of indoor units 70 when switching the operation state of the air conditioner 50, and making a control instruction including the set temperature after the adjustment. Specifically, when switching the operation state of the air conditioner 50 from the predetermined state to the power saving state, the control instruction making unit 57 makes the following adjustment: among the indoor units 70 whose indoor unit thermal state is the indoor unit heat on state, a predetermined number of indoor units 70 whose difference between the set temperature and the current room temperature is inclined to the high temperature side during cooling operation and to the low temperature side during heating operation are set as exceptions, and the set temperature of the indoor units 70 not meeting the exception is changed to the power saving set temperature.

[0051] Therefore, when the operating state of the air conditioner 50 is switched from a preset state to a power-saving state, the air-conditioning environment at the current time point is set to be equivalent to the degraded indoor unit 70, which is set as the control exclusion indoor unit. On the other hand, the remaining indoor units 70 are set as the control object indoor units, and the set temperature of the control object indoor units can be changed to the set temperature of the power-saving state.

[0052] As a result, it is possible to achieve both the effect of improving the air-conditioning environment of the room which is equivalent to deteriorated at the current point in time and the effect of contributing to energy saving.

[0053] In addition, when the power consumption is greater than the target power, the control instruction generating unit 57 generates a control instruction to switch the operating state of the air conditioner 5 belonging to at least one of the plurality of air conditioning systems from a predetermined state to a power saving state. Here, the case where the power consumption is greater than the target power means a case where a required power reduction is required in order to converge the power consumption to the target power.

[0054] Thus, when power reduction is required in order to bring power consumption within the target power, the power reduction request can be responded to by generating a control instruction to switch the operating state of the air conditioner 5 belonging to at least one of the multiple air conditioning systems from a predetermined state to a power saving state.

[0055] Other functions of the control instruction generating unit 57 will be described in detail later as appropriate.

[0056] The control instruction transmitting unit 59 has a function of transmitting the control instruction generated by the control instruction generating unit 57 to the plurality of indoor units 70 .

[0057] [Definition of terms]

[0058] Here, main terms used in this specification are defined.

[0059] The “predetermined state” in the operating state of the air conditioner 50 refers to an operating state that is preset in order to realize a standard air-conditioning function in the air conditioner 50 .

[0060] The "power saving state" in the operating state of the air conditioner 50 refers to an operating state that is preset in order to achieve energy saving based on power consumption reduction compared to the standard air conditioning function in the air conditioner 50. In order to adjust the energy saving effect, the "power saving state" may be configured to set multiple stages of "power saving states" from the perspective of energy saving effects, such as a strong "power saving state", a normal "power saving state", and a weak "power saving state".

[0061] The "set temperature associated with the power-saving state" refers to the "set temperature for power-saving" used to achieve energy saving based on power consumption reduction compared to the standard air-conditioning function in the air conditioner 50. The "set temperature associated with the power-saving state" is preset to an appropriate value when constructing the air-conditioning control system 1 of the present invention. However, the "set temperature associated with the power-saving state" can also be set in a relative temperature difference relative to the set temperature of a predetermined state (for example, +2°C during cooling operation, -2°C during heating operation, etc.).

[0062] “When the operating state of the air conditioner 50 is switched from the predetermined state to the power saving state, a predetermined number of indoor units 70 are made exceptions” means that a predetermined number of indoor units 70 are excluded from the target indoor units for switching the operating state of the air conditioner 50. Thus, in the exceptional indoor units 70, the setting temperature is not adjusted to the setting temperature for power saving. In addition, the air conditioner excluded from the target indoor units for switching the operating state of the air conditioner 50 is sometimes referred to as a “control excluded indoor unit”.

[0063] The indoor unit 70 in which "the difference between the set temperature and the current room temperature is inclined toward the opposite comfort side" refers to an indoor unit in which the current room temperature relative to the set temperature is inclined toward the high temperature side during cooling operation and is inclined toward the low temperature side during heating operation, that is, an indoor unit installed in a room opposite to the comfort level.

[0064] The indoor unit 70 in which "the difference between the set temperature and the current room temperature is inclined toward the comfort side" refers to an indoor unit in which the current room temperature relative to the set temperature is inclined toward the low temperature side during cooling operation and is inclined toward the high temperature side during heating operation, that is, an indoor unit installed in a room that meets comfort requirements.

[0065] 〔Structure of the first building air conditioning system 13-1〕

[0066] The first building air conditioning system 13-1 is configured to include a smart meter 15, a control terminal 17, a first air conditioning system 41, a second air conditioning system 43, and communication media 105 and 107. The smart meter 15 and the control terminal 17 are electrically connected via the communication medium 105. In addition, the control terminal 17 and the first air conditioning system 41 and the control terminal 17 and the second air conditioning system 43 are electrically connected via the communication medium 107, respectively.

[0067] The smart meter 15 has a function of notifying the first air conditioning control device 11 and the like of current power data of the air conditioner 50 belonging to the first building air conditioning system 13 - 1 via the communication media 103 , 105 .

[0068] The control terminal 17 has the following functions: obtaining the current power data of the air conditioner 50 belonging to the first building air conditioning system 13-1 via the communication medium 105, and on the other hand, obtaining / transmitting the set temperature and current room temperature information related to the air conditioner 50 of the first air conditioning system 41, and the set temperature and current room temperature information related to the air conditioner 50 of the second air conditioning system 43 via the communication medium 107.

[0069] like Figure 1 As shown, the first air conditioning system 41 and the second air conditioning system 43 are a group of air conditioners 50 including an outdoor unit 60 and an indoor unit 70 belonging to the first building air conditioning system 13 - 1 .

[0070] The first air conditioning system 41 has an integrated first air conditioner 81, and the individual refrigerant pipes 23a, 25a, 27a, 29a, 31a of the eleventh to fifteenth indoor units 23, 25, 27, 29, 31 are connected to the common refrigerant pipe 45 of the first outdoor unit 21 having the first compressor 22. A solenoid valve 24, 26, 28, 30, 32 for controlling the refrigerant flow rate to each of the eleventh to fifteenth indoor units 23, 25, 27, 29, 31 is provided in each of the individual refrigerant pipes 23a, 25a, 27a, 29a, 31a.

[0071] In the eleventh to fifteenth indoor units 23, 25, 27, 29, 31 (indoor unit 70: see Figure 1 ) is provided with an indoor remote controller (not shown), which is used when setting the air conditioning information, and the air conditioning information includes the operating status of the air conditioner in each room (including power on / off, operating mode (normal / energy saving) / (cooling / heating / dehumidification)), set temperature, current room temperature, indoor unit thermal status, protection status related to the prohibition of the energy saving (eco) mode, wind volume / wind direction, timer setting, etc. Here, the set temperature refers to the target room temperature that should be targeted as the ambient temperature (current room temperature) of each room.

[0072] In addition, a temperature sensor 75 (see, for example, Figure 6 However, the temperature sensor 75 for detecting the current room temperature may be appropriately provided on an indoor remote controller for setting the air conditioning content of the indoor unit 70, or on a wall of a room in which the indoor unit 70 is provided.

[0073] Each of the first outdoor unit 21 and the eleventh to fifteenth indoor units 23 , 25 , 27 , 29 , and 31 belonging to the first air conditioner 81 is electrically connected to the control terminal 17 via the first communication line 42 and the communication medium 107 .

[0074] The air conditioning information related to the first air conditioner 81 is transmitted to the control terminal 17 via the first communication line 42 and the communication medium 107. In addition, the control instructions related to the first air conditioner 81 are transmitted to each of the first outdoor unit 21 and the eleventh to fifteenth indoor units 23, 25, 27, 29, and 31 via the first communication line 42 and the communication medium 107.

[0075] On the other hand, the second air conditioning system 43 includes a second air conditioner 83, and the separate refrigerant pipe 37a of the twenty-first indoor unit 37 is connected to the separate refrigerant pipe 47 of the second outdoor unit 33 having the second compressor 35 in a one-to-one communication manner. The separate refrigerant pipe 37a is not provided with a solenoid valve for controlling the flow rate of the refrigerant to the twenty-first indoor unit 37. However, the separate refrigerant pipe 37a may be provided with a solenoid valve for controlling the flow rate of the refrigerant to the twenty-first indoor unit 37.

[0076] Each of the second outdoor unit 33 and the twenty-first indoor unit 37 belonging to the second air conditioner 83 is electrically connected to the control terminal 17 via the second communication line 46 and the communication medium 107 .

[0077] The air conditioning information related to the second air conditioner 83 is transmitted to the control terminal 17 via the second communication line 46 and the communication medium 107. In addition, the control instruction related to the second air conditioner 83 is transmitted to each of the second outdoor unit 33 and the twenty-first indoor unit 37 via the second communication line 46 and the communication medium 107.

[0078] [Rules for assigning symbols to components in the present specification]

[0079] Here, the convention for assigning symbols to components in the specification of the present invention is mentioned.

[0080] Regarding the first air conditioning control system 1 - 1 of the first embodiment (see Figure 1 ), the second air conditioning control system 1-2 of the second embodiment (refer to Figure 6 ), the third air conditioning control system 1-3 of the third embodiment (refer to Figure 8 ), the fourth air conditioning control system 1-4 of the fourth embodiment (refer to Fig.10 ), unless there is any need to distinguish between them, the first to fourth air-conditioning control systems 1-1, 1-2, 1-3, and 1-4 are referred to as “air-conditioning control system 1”.

[0081] In addition, regarding the first air conditioning control device 11-1 of the first embodiment (see Figure 1 ), the second air conditioning control device 11-2 of the second embodiment (refer to Figure 6 ), the third air conditioning control device 11-3 of the third embodiment (refer to Figure 8 ), the fourth air conditioning control device 11-4 of the fourth embodiment (refer to Fig.10 ), unless there is any need to distinguish between them, the first to fourth air-conditioning control devices 11-1, 11-2, 11-3, and 11-4 are referred to as "air-conditioning control devices 11".

[0082] In addition, regarding the first building air conditioning system 13-1 of the first embodiment (see Figure 1 ), the second building air conditioning system 13-2 of the second embodiment (refer to Figure 6 ), the third building air conditioning system 13-3 of the third embodiment (refer to Figure 8 ), the fourth building air conditioning system 13-4 of the fourth embodiment (refer to Fig.10 ), unless there is any need to distinguish between them, the first to fourth building air conditioning systems 13-1, 13-2, 13-3, and 13-4 will be referred to as "building air conditioning system 13".

[0083] And, if Figure 1 As shown in FIG. 1 and FIG. 2 , the first air conditioner 81 (see FIG. 1 ) of the first air conditioning system 41 is Figure 1 ) and the second air conditioner 83 of the second air-conditioning system 43, the first air conditioner 81 and the second air conditioner 83 are referred to as "air conditioners 50" unless there is any need to distinguish between them.

[0084] As described above, Figure 1 As shown in the figures, the first outdoor unit 21 belonging to the first air-conditioning system 41 and the second outdoor unit 33 belonging to the second air-conditioning system 43 are referred to as "outdoor units 60" unless there is a need to distinguish between them.

[0085] As described above, Figure 1 As shown in the figures, the first compressor 22 of the first outdoor unit 21 and the second compressor 35 of the second outdoor unit 33 are simply referred to as "compressors 63" unless there is a need to distinguish between them.

[0086] As described above, Figure 1 As shown in the figures, regarding the eleventh to fifteenth indoor units 23, 25, 27, 29, 31 belonging to the first air-conditioning system 41 and the twenty-first indoor unit 37 belonging to the second air-conditioning system 43, as long as there is no need to distinguish between them, the eleventh to fifteenth indoor units 23, 25, 27, 29, 31 and the twenty-first indoor unit 37 are referred to as "indoor units 70".

[0087] [Hardware Configuration Example of Air Conditioning Control Device 11]

[0088] Next, refer to Figure 2 , Figure 3 A hardware configuration example of the air-conditioning control device 11 will be described.

[0089] Figure 2It is a block diagram showing a hardware configuration example of the air-conditioning control device 11 according to the embodiment of the present invention. Figure 3 It is conceptually expressed Figure 2 1 is an explanatory diagram of the data structure of the air conditioner management table stored in the database (DB) 61 included in the air conditioning control device 11 shown.

[0090] like Figure 2 As shown, the air conditioning control device 11 is configured to include: a CPU 91 for performing various calculations, a nonvolatile storage medium 93, a memory 95 such as a RAM, a communication unit 97, and a database (DB) 61. These components are electrically connected to each other via a bus 99 so that data can be exchanged. The communication unit 97 is electrically connected to the communication medium 103.

[0091] In the air conditioner management table of DB61, for example Figure 3 As shown, air conditioning information is recorded corresponding to the identification information of the eleventh to fifteenth indoor units 23, 25, 27, 29, and 31, and the air conditioning information includes the operating status related to the air conditioning of each room where these indoor units 70 are respectively installed (including whether the power is on or off? Is the operating mode normal or energy-saving? Cooling, heating, or dehumidification?), set temperature, current room temperature, indoor unit thermal status, and protection status related to the prohibition of energy-saving (eco) mode.

[0092] Here, the protection state related to prohibition of the energy-saving (eco) mode refers to a service that prohibits the operation state from changing from the normal mode to the energy-saving (eco) mode by setting the protection state to on in the indoor unit 70 installed in the server room or VIP room, for example.

[0093] For example, in a special room that requires special consideration, such as a server room or a VIP room, if a structure is adopted in which the protection state is set to on as the air conditioning information of the indoor unit 70 set in the room, an excellent air-conditioning environment suitable for the special room can be stably provided.

[0094] The air conditioning information stored in the air conditioner management table is referred to when creating a control instruction for each of the plurality of indoor units 70 .

[0095] In the air conditioning control device 11, the CPU 91 executes a control program that is pre-stored in the non-volatile storage medium 93 and records the contents of the calculation processing of the present invention, thereby operating in a manner to implement the functions of the target power setting unit 51, the power consumption acquisition unit 53, the air conditioning information acquisition unit 55, the control instruction generation unit 57, and the control instruction sending unit 59.

[0096] [Operation process of the air conditioning control device 11]

[0097] Next, refer to Figure 4 The operation process of the air conditioning control device 11 will be described.

[0098] Figure 4 This is a sequence diagram conceptually showing the operation process of a plurality of functional units when the air conditioner 50 included in the first air-conditioning control system 1 - 1 is caused to perform a cooling operation.

[0099] The target power setting unit 51 sets an upper power limit (or upper power amount) which is an upper limit value of power consumption of the entire building in which the building air conditioning system 13 is installed, for example, according to a user input.

[0100] Considering the demand charge system described below, the upper limit power is the upper limit value of the average power in 30-minute intervals such as 0 to 30 minutes and 30 to 60 minutes per hour. In order to reduce the basic charge of electricity bills, the user sets the target power to a lower value than the upper limit value when the air conditioning control device 11 is not installed. The upper limit power is usually changed once or several times a year.

[0101] The target power setting unit 51 calculates the target power in the middle of the 30-minute interval so that the power consumption does not exceed the target power at the end of the 30-minute interval. The target power set by the target power setting unit 51 is sequentially transmitted to the DB 61 and stored in a predetermined storage area of ​​the DB 61.

[0102] Here, the background that should be considered when setting the upper limit power will be described.

[0103] Regarding the electricity charges of small and medium-sized buildings, when the power is less than 500kW, the demand charge system is mostly applied. The demand charge system refers to a system that measures the average power in 30-minute intervals such as 0 minutes to 30 minutes and 30 minutes to 60 minutes per hour, and determines the basic power fee based on the monthly maximum value of the 30-minute average power value, and it lasts for 12 months. Corresponding to this system, the air conditioning control device 11 of the embodiment of the present invention has a demand control function, which sounds an alarm, sends an email notification, or controls the air conditioner 50 when the 30-minute average power is about to exceed the target, thereby achieving a reduction in power consumption.

[0104] Specifically, the air conditioning control device 11 performs demand control functions by stopping the compressor 63 of the outdoor unit 60 through the contact terminals (not shown) provided on the outdoor unit 60 of the air conditioner 50, limiting the upper limit output of the compressor 63, switching the operation mode of the air conditioner 50 from cooling and heating operation to air supply, changing the set temperature in the direction of power saving, and other remote operations.

[0105] Furthermore, the target power setting unit 51 may set the target power in accordance with a power reduction request related to demand control from a power system manager or a power retailer who aims to balance power supply and demand.

[0106] According to this structure, in addition to the original energy-saving effect obtained by making the power consumption converge to the target power, an effect of responding to social demands such as promoting the balance between power supply and demand can be obtained.

[0107] The power consumption acquisition unit 53 acquires the current power consumption per unit time of the air conditioner 50 belonging to the building air conditioning system 13, i.e., the current power data, for example, in a one-minute cycle via the smart meter 15 and the control terminal 17. The current power data acquired by the power consumption acquisition unit 53 is transmitted to the DB 61 and stored in a predetermined storage area of ​​the DB 61.

[0108] The air conditioning information acquisition unit 55 acquires air conditioning information, for example, in a one-minute cycle, and the air conditioning information includes an operating state, a set temperature, a current room temperature, a thermal state of the indoor unit, and a protection state related to energy saving related to each of the plurality of indoor units 70. The air conditioning information acquired by the air conditioning information acquisition unit 55 is transmitted to the DB 61 and stored in a predetermined storage area of ​​the DB 61.

[0109] The control instruction generating unit 57 reads a list of indoor units 70 to be controlled from the DB 61 (in Figure 1 In the example shown, the list of the eleventh to fifteenth indoor units 23, 25, 27, 29, 31 is sometimes referred to as an "indoor unit list." ), the target power set by the target power setting unit 51, the current power consumption obtained by the power consumption acquisition unit 53, that is, the current power, the set temperature before the air conditioning information of each of the multiple indoor units 70 is changed, and based on the various information read out, the set temperature before the change and the control instructions of the multiple indoor units 70 are prepared in a 1-minute cycle.

[0110] The set temperatures and control instructions before the change of the plurality of indoor units 70 generated by the control instruction generating unit 57 are sent to the DB 61 and stored in a predetermined storage area of ​​the DB 61 .

[0111] The control instruction transmitting unit 59 reads the control instruction for each of the plurality of indoor units 70 created by the control instruction creating unit 57 from the DB 61 at a cycle of, for example, one minute, and transmits the read control instruction to each of the plurality of indoor units 70 .

[0112] [Basic Operation of Air Conditioner 50]

[0113] Next, the basic operation of the indoor unit 70 will be described using the eleventh indoor unit 23 as a representative example.

[0114] The eleventh indoor unit 23 is provided with an indoor remote controller (not shown) for setting the air-conditioning environment of the room in which the eleventh indoor unit 23 is installed. The user can set the operation state related to the air conditioner (including whether the power is on or off?, cooling, heating or dehumidification?), set the temperature, air volume, wind direction, etc. by operating the operation buttons of the indoor remote controller.

[0115] The eleventh indoor unit 23 adjusts the air volume and the refrigerant inflow amount so that the temperature sensor 75 (for example, see Figure 6 ) The current room temperature detected is consistent with the set temperature.

[0116] The amount of refrigerant flowing into the eleventh indoor unit 23 is adjusted by using the solenoid valve 24, or by making an increase or decrease request for the amount of refrigerant flowing into the first outdoor unit 21 through the eleventh indoor unit 23. The first outdoor unit 21 totals the increase or decrease requests for the amount of refrigerant flowing in from each indoor unit 70, and determines the rotation speed of the first compressor 22 in a manner that satisfies the total increase or decrease request for the amount of refrigerant flowing in.

[0117] When the indoor cooling and heating load is smaller than the capacity of the air conditioner 50, it is easy to fall into an air-conditioning state of overcooling during cooling operation and overheating during heating operation. In this case, a thermal shutdown temperature is set to stop the flow of refrigerant into the eleventh indoor unit 23. When the current room temperature reaches the thermal shutdown temperature, the solenoid valve 24 is closed to stop the flow of refrigerant. In the eleventh indoor unit 23 where the flow of refrigerant is stopped, the current room temperature rises during cooling operation and drops during heating operation. If the current room temperature reaches the thermal opening temperature, the solenoid valve 24 is opened to resume the flow of refrigerant. Generally, the state in which the solenoid valve 24 is open is called the indoor unit thermal opening state, and the state in which the solenoid valve 24 is closed is called the indoor unit thermal closing state.

[0118] When only one of the eleventh to fifteenth indoor units 23, 25, 27, 29, and 31 connected to the first outdoor unit 21 in an integrated form is in the heat-on state, if the current room temperature of the one indoor unit 70 reaches the heat-off temperature, the first outdoor unit 21 stops the first compressor 22. Thereafter, when any one of the eleventh to fifteenth indoor units 23, 25, 27, 29, and 31 reaches the heat-on temperature, the first outdoor unit 21 restarts the first compressor 22.

[0119] In the case where the only indoor unit 70 connected to the second outdoor unit 33 is the twenty-first indoor unit 37 as in the second air conditioning system 43, the electromagnetic valve for controlling the flow rate of the refrigerant to the twenty-first indoor unit 37 may be omitted for the separate refrigerant piping 37a of the twenty-first indoor unit 37. In this case, if the current room temperature reaches the thermal shutoff temperature, the second outdoor unit 33 stops the second compressor 35, and then, if the current room temperature reaches the thermal start-up temperature, the second compressor 35 is restarted.

[0120] The heat on temperature and the heat off temperature of the indoor unit 70 are determined by internal calculation based on the set temperature of the indoor unit 70. The difference between the heat off temperature and the set temperature and the difference between the heat on temperature and the set temperature are predetermined as design values ​​of the indoor unit 70.

[0121] [Operation of the First Air Conditioning Control Device 11 - 1]

[0122] Next, refer to Figure 5A The operation of the first air conditioning control device 11 - 1 of the first embodiment will be described.

[0123] Figure 5A This is a flowchart for explaining the operation of the first air conditioning control device 11 - 1 according to the first embodiment.

[0124] Figure 5A The illustrated flow is executed by the CPU 91 (mainly the control instruction generating unit 57 ) belonging to the first air-conditioning control device 11 - 1 in a cycle of, for example, one minute.

[0125] In step S1, the CPU 91 of the air conditioning control device 11 reads the target power set by the target power setting unit 51 and the current power data obtained by the power consumption acquisition unit 53 from the DB 61, and obtains the power difference (target power - current power) Pdf between the read target power and the current power. Then, the CPU 91 determines whether the sign of the power difference Pdf is positive or negative.

[0126] If the result of the judgment in step S1 is that the sign of the power difference Pdf is positive (step S1 is yes), CPU91 causes the processing flow to enter the next step S2. On the other hand, if the sign of the power difference Pdf is negative (step S1 is no), CPU91 causes the processing flow to jump to step S16.

[0127] In step S2, the CPU 91 sequentially substitutes the system identifications of the first air conditioning system (system identification: 1) 41 and the second air conditioning system (system identification: 2) 43 belonging to the first building air conditioning system 13-1 into the variable i, and executes the repeated processing of steps S2 to S14.

[0128] In step S3, the CPU 91 obtains the number of operating (power-on) indoor units [IDU_ON_num] belonging to the system i.

[0129] In step S4, the CPU 91 obtains a list of target indoor units 70 that belong to the system i and whose set temperatures are not the power saving set temperatures (target indoor unit list).

[0130] In step S5, the CPU 91 determines whether the indoor unit 70 belonging to the system i satisfies a predetermined condition [(IDU_ON_num ≥ 2) and (does the target indoor unit exist?)].

[0131] When the result of the judgment in step S5 is that the specified conditions are met (step S5 is: the number of indoor units in the action belonging to system i [IDU_ON_num] is greater than 2 and the target indoor unit 70 of step S4 exists), CPU91 causes the processing flow to enter the next step S6. On the other hand, when the specified conditions are not met (step S5 is no: the number of indoor units in the action belonging to system i [IDU_ON_num] is less than 2 and / or the target indoor unit 70 of step S4 does not exist), CPU91 ends the repeated processing.

[0132] In step S6, the CPU 91 sorts the target indoor units 70 in the target indoor unit list obtained in step 4 by using the temperature difference (current room temperature - set temperature) of each indoor unit 70 during cooling operation, and sorts them by using the temperature difference (set temperature - current room temperature) of each indoor unit 70 during heating operation (rearranges the listing order in descending order). Through this sorting, the target indoor units 70 in the target indoor unit list are arranged in descending order of anti-comfort.

[0133] In step S8-1, the CPU 91 substitutes 1 into the number of indoor units excluded from control [e_c]. Thus, the number of indoor units excluded from control e_c is initially set.

[0134] In step S9 , the CPU 91 sequentially substitutes the indoor unit identifications associated with the target indoor units 70 present in the target indoor unit list acquired in step S4 into a variable j, and executes repeated processing of S9 to S13 .

[0135] In step S10, the CPU 91 determines whether "the number of controlled excluded indoor units e_c is 1 or more and the indoor unit 70 specified by j is in the thermo-on state".

[0136] When the result of the judgment of step S10 is that the number of indoor units excluded by control e_c is less than 1 or the indoor unit 70 determined by j is in the heat-off state (step S10 No), CPU91 causes the processing flow to enter the next step S11. On the other hand, when the number of indoor units excluded by control e_c is greater than 1 and the indoor unit 70 determined by j is in the heat-on state (step S10 Yes), CPU91 causes the processing flow to jump to step S15.

[0137] In step S11, the CPU 91 records the set temperature before change (non-power saving set temperature) of the indoor unit j (the indoor unit whose indoor unit identification corresponds to the variable j).

[0138] In step S12, the CPU 91 changes the set temperature of the indoor unit j to the power saving set temperature (the set temperature in the power saving state).

[0139] In step S13 , the CPU 91 determines whether to continue the repetitive processing of S9 to S13 .

[0140] The result of the judgment of step S13 is that when the iterative processing of all indoor units 70 existing in the target indoor unit list obtained in step S4 has not been completed, CPU91 continues the iterative processing of S9 to S13. On the other hand, when the iterative processing of all indoor units 70 existing in the target indoor unit list obtained in step S4 is completed, CPU91 completes the iterative processing of S9 to S13 and enters the processing flow into the next step S14.

[0141] In step S14 , the CPU 91 determines whether to continue the repetitive processing of S2 to S14 .

[0142] The result of the judgment of step S13 is that when the iterative processing of all air-conditioning systems belonging to the first building air-conditioning system 13-1 has not been completed, CPU91 continues the iterative processing of S2 to S14. On the other hand, when the iterative processing of all air-conditioning systems belonging to the first building air-conditioning system 13-1 is completed, CPU91 terminates the iterative processing of S2 to S14, thereby terminating the processing of a series of control indication functions.

[0143] In step S15 (in step S10, a judgment is made that the number of controlled excluded indoor units e_c is greater than 1 and the indoor unit 70 determined by j is in the heat-on state), CPU 91 decrements the number of controlled excluded indoor units e_c [e_c=e_c-1], and transfers the processing flow to step S13.

[0144] In step S16 (in step S1, it is determined that the sign of the power difference Pdf is negative), CPU 91 substitutes the system identifications of the first air-conditioning system (system identification: 1) 41 and the second air-conditioning system (system identification: 2) 43 belonging to the first building air-conditioning system 13-1 into the variable i in sequence, and performs repeated processing of steps S16 to S22.

[0145] In step S17, the CPU 91 obtains a list of the indoor units 70 belonging to the system i (indoor unit list).

[0146] In step S18, the CPU 91 sequentially substitutes the indoor unit identifications present in the list of indoor units 70 acquired in step S17 into a variable j, and executes repeated processing of S18 to S21.

[0147] In step S19, the CPU 91 determines whether the set temperature of the indoor unit j (the indoor unit whose indoor unit identification matches the variable j) is the power saving set temperature (the set temperature in the power saving state).

[0148] If the result of the judgment in step S19 is that the set temperature of the indoor unit j is consistent with the set temperature during power saving (step S19 is yes), CPU91 causes the processing flow to enter the next step S20. On the other hand, if the set temperature of the indoor unit j is inconsistent with the set temperature during power saving (step S19 is no), CPU91 causes the processing flow to jump to step S21.

[0149] In step S20, the CPU 91 returns the set temperature of the indoor unit j to the set temperature before the change (the set temperature during non-power saving).

[0150] In step S21 , the CPU 91 determines whether or not to continue the repetitive processing of S18 to S21 .

[0151] The result of the judgment of step S21 is that when the iterative processing of all indoor units 70 existing in the indoor unit list obtained in step S17 has not been completed, CPU91 continues the iterative processing of S18 to S21. On the other hand, when the iterative processing of all indoor units 70 existing in the indoor unit list obtained in step S17 is completed, CPU91 completes the iterative processing of S18 to S21 and enters the processing flow into the next step S22.

[0152] In step S22 , the CPU 91 determines whether to continue the repetitive processing of S16 to S22 .

[0153] If the result of the judgment of step S22 is that the iterative processing of all air-conditioning systems belonging to the first building air-conditioning system 13-1 has not been completed, CPU91 continues the iterative processing of S16 to S22. On the other hand, if the iterative processing of all air-conditioning systems belonging to the first building air-conditioning system 13-1 has been completed, CPU91 terminates the iterative processing of S16 to S22, thereby terminating the processing of a series of control indication functions.

[0154] [Cooperation Operation of the Air Conditioner 50 Included in the First Air Conditioning Control System 13 - 1 ]

[0155] Next, refer to Figure 5B The following describes the cooperative operation of the air conditioner 50 included in the first air conditioning control system 13 - 1 of the first embodiment.

[0156] Figure 5B This is a timing chart for explaining the cooperative operation of the air conditioner 50 (during cooling operation) included in the first air conditioning control system 13 - 1 of the first embodiment.

[0157] exist Figure 5B The timing diagram shown in Figure 5A In step S1 shown, the power difference (target power - current power) Pdf between the target power and the current power (building power consumption) changes from positive (when the current power is smaller than the target power) to negative (when the current power is larger than the target power) before and after the moment t1 when the power difference (target power - current power) Pdf between the target power and the current power (building power consumption) changes from positive (when the current power is smaller than the target power) to negative (when the current power is larger than the target power), and the current room temperature, set temperature, and indoor unit thermal state of the eleventh to fifteenth indoor units 23, 25, 27, 29, 31, respectively, and the outdoor unit thermal state of the first outdoor unit 21 and the air conditioner power consumption change over time.

[0158] When the current room temperature of each indoor unit 70 is decreasing to the right, the thermal state is the indoor unit thermal on, and when the current room temperature is increasing to the right, the thermal state is the indoor unit thermal off.

[0159] exist Figure 5B In the figure, at the time point t1 when the power difference between the target power and the current power (target power - current power) Pdf changes from positive to negative, the indoor units 70 in the indoor unit heat on state are the eleventh indoor unit 23, the thirteenth indoor unit 27, and the fifteenth indoor unit 31. In addition, in the fifteenth indoor unit 31, the time t1 is the time immediately after the indoor unit heat state changes from the indoor unit heat off to the indoor unit heat on.

[0160] At this time, the difference between the set temperature and the current room temperature (current room temperature - set temperature) among the three units is the most inclined to the anti-comfort side in the fifteenth indoor unit 31. Therefore, the fifteenth indoor unit 31 is set as an exception to the indoor unit to which the set temperature is changed to the power saving set temperature (the set temperature in the power saving state) (refer to Figure 5A In step S15 shown in FIG. 1 , the set temperatures of the remaining four indoor units 23, 25, 27, and 29 are changed to the power saving set temperatures (see FIG. 1 ). Figure 5A Step S12 and Figure 5B ).

[0161] As a result, the four indoor units 23, 25, 27, and 29 become the indoor unit thermally closed state, and the air-conditioning load of the first outdoor unit 21 is reduced, thereby reducing power consumption. However, one indoor unit (the fifteenth indoor unit 31) maintains the indoor unit thermally open state, and therefore, the thermal state of the first outdoor unit 21 will not be converted to the outdoor unit thermally closed state.

[0162] Here, it should be noted that the indoor unit 70 (the fifteenth indoor unit 31) maintaining the indoor unit heat on state is the indoor unit 70 installed in the room with the highest anti-comfort, in other words, the room with the lowest comfort, among the indoor units in the indoor unit heat on state. If configured in this way, both the effect of improving the air-conditioning environment of the room with the lowest comfort and the effect of contributing to energy saving can be achieved.

[0163] At the same time, it should also be noted that the indoor unit 70 (the fifteenth indoor unit 31) maintaining the indoor unit heat-on state has the highest probability of being able to maintain the indoor unit heat-on state before any of the indoor units 70 whose set temperatures have been changed next enter the indoor unit heat-on state. With this configuration, the effect of contributing to energy saving can be achieved more reliably.

[0164] In the description of the operation of the first embodiment, the case where the air conditioner 50 is in cooling operation is exemplified, but the same control as in cooling operation is performed in heating operation, thereby achieving the same effects as described above.

[0165] Then, at time t2, the room temperature of the fifteenth indoor unit reaches the thermal shutdown temperature, and the indoor unit is changed to the thermal shutdown state. At time t3, the first air conditioning control system 13-1 changes the set temperature of the fifteenth indoor unit to the power saving set temperature. This is because the fifteenth indoor unit becomes the indoor unit thermal shutdown, so it cannot play the role of preventing the outdoor unit from thermal shutdown. As a result, in the fifteenth indoor unit, the indoor unit thermal shutdown continues for a long time, so the effect of helping to save energy becomes greater.

[0166] According to the first air conditioning control device 11-1 and the first air conditioning control system 1-1 of the first embodiment, in the integrated air conditioner 50, even when the set temperature is changed toward power saving, the air conditioning environment of the room with low comfort can be improved while contributing to energy saving.

[0167] [Schematic Structure of Second Air Conditioning Control System 1-2 of Second Embodiment]

[0168] Next, refer to Figure 6 A schematic configuration of the second air-conditioning control system 1 - 2 according to the second embodiment will be described.

[0169] Figure 6 1 is a schematic configuration diagram functionally showing the outline of the second air-conditioning control system 1 - 2 according to the second embodiment.

[0170] The first air conditioning control system 1 - 1 of the first embodiment and the second air conditioning control system 1 - 2 of the second embodiment have the same basic structure. Therefore, the second air conditioning control system 1 - 2 of the second embodiment will be described by focusing on the differences between the two.

[0171] In the first embodiment, the first air conditioning control device 11-1 is installed in a different place from the first building air conditioning system 13-1, while in the second embodiment, the second air conditioning control device 11-2 is installed in the same building as the second building air conditioning system 13-2. Due to this difference, the control terminal function unit 54 that performs the same function as the control terminal 17 installed in the first building air conditioning system 13-1 is installed in the second air conditioning control device 11-2.

[0172] In the first embodiment, the current room temperature of each of the plurality of indoor units 70 is detected by the temperature sensor 75 provided at the air inlet, whereas in the second embodiment, the current room temperature of each of the plurality of indoor units 70 is detected by the temperature sensors 23b, 25b, 27b, 29b, 31b (see Figure 6 ) detects the current room temperature of each room.

[0173] In addition, the hardware structure of the second air conditioning control device 11 - 2 is the same as that of the first air conditioning control device 11 - 1 .

[0174] [Operation of the Second Air Conditioning Control Device 11 - 2]

[0175] Next, refer to Fig. 7A The operation of the second air conditioning control device 11 - 2 according to the second embodiment will be described.

[0176] Fig. 7A This is a flowchart for explaining the operation of the second air conditioning control device 11 - 2 according to the second embodiment.

[0177] Fig. 7A The illustrated flow is executed by the CPU 91 (mainly the control instruction generating unit 57 ) belonging to the second air-conditioning control device 11 - 2 in a cycle of, for example, one minute.

[0178] The first air conditioning control device 11-1 of the first embodiment and the second air conditioning control device 11-2 of the second embodiment have the same basic operation. Therefore, the operation of the second air conditioning control device 11-2 of the second embodiment will be described by focusing on the differences between the two.

[0179] In the first embodiment, in step S8-1, CPU91 substitutes 1 into the control to exclude the number of indoor units [e_c]. In contrast, in the second embodiment, in step S8-2, CPU91 substitutes 1-[the number of indoor units with set temperature and heat-on state during power saving] into the control to exclude the number of indoor units [e_c].

[0180] Therefore, when determining whether to change the set temperature to the power-saving set temperature, in the first embodiment, one unit is excluded. In contrast, in the second embodiment, when there are already indoor units 70 that have been changed to the power-saving set temperature and any one of them is in the indoor unit heat-on state, the indoor unit 70 that has not yet been changed to the power-saving set temperature can be removed from the exclusion when changing to the power-saving set temperature, thereby changing to the power-saving set temperature.

[0181] Therefore, in the second embodiment, compared with the first embodiment, it is expected that all the indoor units 70 can be changed to the power saving temperature setting more quickly.

[0182] [Cooperation Operation of the Air Conditioner 50 Included in the Second Air Conditioning Control System 13 - 2]

[0183] Next, refer to Figure 7B The cooperative operation of the air conditioner 50 included in the second air conditioning control system 13 - 2 of the second embodiment will be described.

[0184] Figure 7B This is a timing chart for explaining the cooperative operation of the air conditioner 50 (during cooling operation) included in the second air conditioning control system 13 - 2 of the second embodiment.

[0185] The difference between the first embodiment and the second embodiment lies in that, in the first embodiment, regarding the control exclusion of the indoor unit (the fifteenth indoor unit 31) from the object range (as an exception) of the indoor unit 70 when the set temperature is changed to the power saving set temperature, in the second embodiment, the timing of the moment t4 when one indoor unit (the twelfth indoor unit 25) among the four indoor units 23, 25, 27, 29 whose set temperatures have been changed to the power saving set temperature is changed to the indoor unit heat-on state is used as a trigger, and the set temperature of the excluded indoor unit (the fifteenth indoor unit 31) is changed to the power saving set temperature at a timing of a moment t5 slightly delayed relative to the moment t4.

[0186] According to the second embodiment, all the indoor units 70 are quickly changed to the power saving set temperature compared to the first embodiment, so a further power saving effect can be expected.

[0187] Furthermore, according to the second embodiment, an additional effect can be obtained in which each of the plurality of indoor units 70 is equally given an opportunity to change the set temperature to the power saving set temperature.

[0188] [Schematic Structure of the Third Air Conditioning Control System 1-3 of the Third Embodiment]

[0189] Next, refer to Figure 8 A schematic configuration of a third air-conditioning control system 1 - 3 according to the third embodiment will be described.

[0190] Figure 8 1 is a schematic configuration diagram functionally showing an outline of a third air-conditioning control system 1 - 3 according to the third embodiment.

[0191] The first air conditioning control system 1 - 1 of the first embodiment and the third air conditioning control system 1 - 3 of the third embodiment have the same basic structure. Therefore, the third air conditioning control system 1 - 3 of the third embodiment will be described by focusing on the differences between the two instead of the description.

[0192] In the first embodiment, the first air-conditioning control device 11-1 adopts, for example, the amount of electric power appropriately set by the user as the target power of the target power setting unit 51. In contrast, in the third embodiment, the target power based on demand control transmitted from the aggregation coordinator system (equivalent to the "superior system" of the present invention) 19 connected to the third air-conditioning control device 11-3 via the communication medium 101 is adopted as the target power of the target power setting unit 51.

[0193] In addition, the hardware structure of the third air conditioning control device 11 - 3 is the same as that of the first air conditioning control device 11 - 1 .

[0194] [Operation of the Third Air Conditioning Control Device 11 - 3]

[0195] Next, refer to Fig.9A The operation of the third air conditioning control device 11 - 3 of the third embodiment will be described.

[0196] Fig.9A This is a flowchart for explaining the operation of the third air conditioning control device 11 - 3 according to the third embodiment.

[0197] Fig.9A The illustrated flow is executed by the CPU 91 (mainly the control instruction generating unit 57 ) belonging to the third air-conditioning control device 11 - 3 in a cycle of, for example, one minute.

[0198] The second air conditioning control device 11-2 of the second embodiment and the third air conditioning control device 11-3 of the third embodiment have the same basic operation. Therefore, the operation of the third air conditioning control device 11-3 of the third embodiment will be described by focusing on the differences between the two.

[0199] In the second embodiment, in step S8-1, CPU91 adopts a process of substituting 1-〔the number of indoor units with the temperature set during power saving and the heat turned on〕into the control to exclude the calculation of the number of indoor units〔e_c〕. In contrast, in the third embodiment, in step S8-3, CPU91 adopts a process of substituting 2-〔the number of indoor units with the temperature set during power saving and the heat turned on〕into the control to exclude the calculation of the number of indoor units〔e_c〕.

[0200] Therefore, regarding the number of indoor units excluded from control e_c whose set temperature has not been changed to the set temperature for power saving, when there is no "number of indoor units with the set temperature for power saving and heat on state", in the second embodiment, the number of indoor units excluded from control e_c is set to 1, whereas in the third embodiment, the number of indoor units excluded from control e_c is set to 2.

[0201] Therefore, according to the third embodiment, compared with the second embodiment, the effect of further suppressing the outdoor unit 60 from falling into the outdoor unit thermo-off state can be expected.

[0202] [Cooperation Operation of the Air Conditioner 50 Included in the Third Air Conditioning Control System 13 - 3]

[0203] Next, refer to Fig. 9B The cooperative operation of the air conditioner 50 included in the third air conditioning control system 13 - 3 of the third embodiment will be described.

[0204] Fig. 9B It is a timing chart for explaining the cooperative operation of the air conditioner 50 (during cooling operation) included in the third air conditioning control system 13 - 3 of the third embodiment.

[0205] The differences between the second embodiment and the third embodiment are as follows.

[0206] That is, in the second embodiment, at the time point t1 when the power difference between the target power and the current power (target power - current power) Pdf changes from positive to negative, the indoor units 70 in the indoor unit heat on state are the eleventh indoor unit 23, the thirteenth indoor unit 27, and the fifteenth indoor unit 31. In addition, in the fifteenth indoor unit 31, the time t1 is the timing immediately after the indoor unit heat state changes from the indoor unit heat off to the indoor unit heat on.

[0207] At this time, the difference between the set temperature and the current room temperature (current room temperature - set temperature) among the three units is the most inclined to the anti-comfort side in the fifteenth indoor unit 31. Therefore, in the second embodiment, the fifteenth indoor unit 31 is set as an exception (refer to Fig. 7A In step S15 shown in FIG. 1 , the set temperatures of the remaining four indoor units 23, 25, 27, and 29 are changed to the power saving set temperatures (see FIG. 1 ). Fig. 7A Step S12 and Figure 7B ).

[0208] In contrast, in the third embodiment, in addition to the fifteenth indoor unit 31 of the three indoor units, the difference between the set temperature and the current room temperature (current room temperature - set temperature) is most inclined toward the anti-comfort side, and the eleventh indoor unit 23 of the difference between the set temperature and the current room temperature (current room temperature - set temperature) is set as an exception (refer to Fig.9A In step S15 shown in FIG. 1 , the set temperatures of the remaining three indoor units 25, 27, and 29 are changed to the power saving set temperatures (see FIG. 1 ). Fig.9A Step S12 and Fig. 9B ).

[0209] As a result, the three indoor units 25, 27, and 29 become the indoor unit thermally closed state, and the air-conditioning load of the first outdoor unit 21 is reduced, thereby reducing power consumption. However, two indoor units (the eleventh indoor unit 23 and the fifteenth indoor unit 31) maintain the indoor unit thermally open state, thereby further reducing the risk of the first outdoor unit 21 turning into the outdoor unit thermally closed state.

[0210] In the third embodiment, compared with the second embodiment, at the time point t1 when the power difference between the target power and the current power (target power - current power) Pdf changes from positive to negative, the indoor units (the eleventh indoor unit 23 and the fifteenth indoor unit 31) that maintain the indoor unit thermally on state are increased from one to two. Therefore, even if any one of the two units accidentally and quickly becomes the indoor unit thermally off state, the other unit maintains the indoor unit thermally on state.

[0211] Therefore, according to the third embodiment, the risk of the first outdoor unit 21 being switched to the outdoor unit heat-off state can be further reduced compared to the second embodiment. As a result, it can be expected that the increase in power consumption generated when the first outdoor unit 21 is switched to the outdoor unit heat-off state will be reduced (see Fig.12 The comparative example shown) has the effect of suppressing it before it occurs.

[0212] Furthermore, in the second embodiment, with respect to the control exclusion indoor unit (the fifteenth indoor unit 31) which is excluded from the object range (as an exception) of the indoor unit 70 when the set temperature is changed to the power saving set temperature, the set temperature of the excluded indoor unit (the fifteenth indoor unit 31) is changed to the power saving set temperature at the timing of moment t2 when one indoor unit (the twelfth indoor unit 25) among the four indoor units 23, 25, 27, and 29 whose set temperatures have been changed to the power saving set temperature is changed to the indoor unit heat-on state, and the set temperature of the excluded indoor unit (the fifteenth indoor unit 31) is changed to the power saving set temperature at the timing of moment t3 which is slightly delayed relative to moment t2.

[0213] In contrast, in the third embodiment, with regard to the control of excluding indoor units (the eleventh indoor unit 23 and the fifteenth indoor unit 31), the timing of moment t6 when one indoor unit (the twelfth indoor unit 25) among the four indoor units 23, 25, 27, 29 whose set temperatures have been changed to the power saving set temperatures is switched to the indoor unit heat-on state is used as a trigger, and the set temperature of the excluded indoor unit (the fifteenth indoor unit 31) is changed to the power saving set temperature at a timing of moment t7 which is slightly delayed relative to moment t6.

[0214] According to the third embodiment, the number of indoor units 70 whose set temperatures are changed to the power saving set temperatures can be increased rapidly compared to the second embodiment. In addition, the effect of evenly giving each of the plurality of indoor units 70 an opportunity to change the set temperatures to the power saving set temperatures can be further improved.

[0215] [Schematic Structure of the Fourth Air Conditioning Control System 1-4 of the Fourth Embodiment]

[0216] Next, refer to Fig.10 A schematic configuration of a fourth air-conditioning control system 1 - 4 according to the fourth embodiment will be described.

[0217] Fig.10 1 is a schematic configuration diagram functionally showing an outline of a fourth air-conditioning control system 1 - 4 according to the fourth embodiment.

[0218] The first air conditioning control system 1 - 1 of the first embodiment and the fourth air conditioning control system 1 - 4 of the fourth embodiment have the same basic structure. Therefore, the fourth air conditioning control system 1 - 4 of the fourth embodiment will be described by focusing on the differences between the two instead of describing the fourth air conditioning control system 1 - 4 of the fourth embodiment.

[0219] The first air-conditioning control device 11-4 of the fourth embodiment differs from the structure of the first air-conditioning control device 11-1 of the first embodiment (target power setting unit 51, power consumption acquisition unit 53, air-conditioning information acquisition unit 55, control instruction preparation unit 57 and control instruction sending unit 59) in that a time change rate recording unit 56 is added.

[0220] The time change rate recording unit 56 has a function of recording the time change rate of the current room temperature of the indoor unit 70 when each indoor unit 70 changes from the indoor unit heat on state to the indoor unit heat off state. The time change rate data recorded by the time change rate recording unit 56 is referred to when predicting the timing when the thermal state of a certain indoor unit 70 changes from the indoor unit heat on state to the indoor unit heat off state.

[0221] In addition, in the first embodiment, the current room temperature of each of the multiple indoor units 70 is detected by a temperature sensor 75 installed at the air intake port. In contrast, in the fourth embodiment, based on the temperature sensor 75, the outdoor atmosphere temperature is detected by an external air temperature sensor 76 installed outside the fourth building air conditioning system 13-4.

[0222] In the first air conditioning control device 11-4 of the fourth embodiment, the CPU 91 obtains the correlation between the slope data of the time change rate of the current room temperature for several hours, for example, and the outdoor ambient temperature, based on the time change rate of the current room temperature of each indoor unit 70 when the indoor unit 70 changes from the indoor unit heat-on state to the indoor unit heat-off state recorded by the time change rate recording unit 56 and the outdoor ambient temperature detected by the outdoor air temperature sensor 76, thereby obtaining the correlation between the slope data of the time change rate of the current room temperature for several hours and the outdoor ambient temperature, and the outdoor ambient temperature detected by the outdoor air temperature sensor 76, for a certain indoor unit (in Fig. 11C In the example shown, the fifteenth indoor unit 31) 70 is used, and the timing of transition from the indoor unit thermo-on state to the indoor unit thermo-off state is predicted.

[0223] In addition, the hardware structure of the fourth air conditioning control device 11 - 4 is substantially the same as that of the first air conditioning control device 11 - 1 .

[0224] [Operation of the Fourth Air Conditioning Control Device 11 - 4]

[0225] Next, refer to Fig.11A and Fig. 11B The operation of the fourth air conditioning control device 11 - 4 of the fourth embodiment will be described.

[0226] Fig.11A and Fig. 11B This is a flowchart for explaining the operation of the fourth air conditioning control device 11 - 4 according to the fourth embodiment.

[0227] Fig.11A and Fig. 11B The illustrated flow is executed by the CPU 91 (mainly the control instruction generating unit 57 ) belonging to the fourth air conditioning control device 11 - 4 in a cycle of, for example, one minute.

[0228] The second air conditioning control device 11-2 of the second embodiment and the fourth air conditioning control device 11-4 of the fourth embodiment have the same basic operation. Therefore, the operation of the fourth air conditioning control device 11-4 of the fourth embodiment will be described by focusing on the differences between the two.

[0229] In the second embodiment, in step S8-2, the CPU 91 adopts a process of substituting 1-〔the number of indoor units in the power saving set temperature and the heat on state〕 into the calculation of the control exclusion indoor unit number〔e_c〕. In contrast, in the fourth embodiment, in step S8-4 (refer to Fig.11A ) in which the CPU 91 performs a control operation to exclude the number of indoor units [e_c=1].

[0230] Therefore, regarding the number of indoor units e_c excluded from the control that has not changed the set temperature to the set temperature for power saving, in the second embodiment, the number of indoor units e_c excluded from the control is set to 1 or 0 (the case where the number of indoor units in the set temperature for power saving and the heat-on state does not exist), and in contrast, in the fourth embodiment, the number of indoor units e_c excluded from the control is set to 1.

[0231] Furthermore, in the fourth embodiment, the processing of step S7 and step S23 is inserted before step S8-2 (before step S8-4) of the second embodiment.

[0232] exist Fig.11A In step S7 shown in FIG. 1 , the CPU 91 substitutes the number of indoor units belonging to the system i and in the indoor unit heat-on state into the indoor unit heat-on number ThOn_num.

[0233] In step S23 , the CPU 91 determines whether the number of indoor unit thermo-ON units ThOn_num is 1.

[0234] If the result of the determination in step S23 is that the number of indoor units turned on by heat ThOn_num is not equal to 1 (step S23 No), the CPU 91 causes the processing flow to proceed to the aforementioned step S8-4. On the other hand, if the number of target indoor units is 1 (step S23 Yes), the CPU 91 causes the processing flow to proceed to the next step S24 (refer to Fig. 11B ).

[0235] exist Fig. 11B In step S24 shown in FIG. 1 , the CPU 91 obtains the indoor unit identification of one target indoor unit 70 listed in the target indoor unit list.

[0236] In step S25, the CPU 91 calculates the predicted transition time t_th required for the next transition to the heat-off state based on the temperature change within a predetermined time t_fx (e.g., a time length of 2 minutes) of the target indoor unit 70 with indoor unit identification. Here, the predicted transition time t_th is equivalent to the "delay time length" of the present invention, and the predetermined time t_fx is equivalent to the "prescribed time threshold" of the present invention.

[0237] In step S26 , the CPU 91 determines whether the predicted transition time t_th calculated in step S25 is equal to or shorter than the predetermined time t_fx.

[0238] When the result of the judgment of step S26 is that the transition prediction time t_th is less than the prescribed time t_fx (step S26 is yes), CPU91 causes the processing flow to enter the next step S27. On the other hand, when the transition prediction time t_th exceeds the prescribed time t_fx (step S26 is no), that is, when it is predicted that there is a certain degree of delay before the object indoor unit 70 in the heat-on state is converted to the heat-off state, CPU91 causes the processing flow to return to step S14.

[0239] In step S27, the CPU 91 obtains a list (target indoor unit list) of target indoor units 70 that belong to the system i, are in the indoor unit heat-on state, and have a set temperature that is a power saving set temperature.

[0240] In step S28, CPU 91 obtains the indoor unit identification of the indoor unit 70 having the largest temperature difference (current room temperature - set temperature) among the indoor units 70 during cooling operation and the largest temperature difference (set temperature - current room temperature) among the indoor units 70 during heating operation, from the target indoor unit list obtained in step S27, that is, the indoor unit 70 with the worst air-conditioning environment at the current time point.

[0241] In step S29, the CPU 91 returns the set temperature of the indoor unit 70 to which the indoor unit identification acquired in step S28 is assigned to the set temperature before the change (the non-power saving set temperature). Thereafter, the CPU 91 returns the processing flow to step S14.

[0242] [Cooperation Operation of the Air Conditioner 50 Included in the Fourth Air Conditioning Control System 13 - 4]

[0243] Next, refer to Fig. 11C The cooperative operation of the air conditioner 50 included in the fourth air conditioning control system 13 - 4 of the fourth embodiment will be described.

[0244] Fig. 11CIt is a timing chart for explaining the cooperative operation of the air conditioner 50 (during cooling operation) included in the fourth air conditioning control system 13 - 4 of the fourth embodiment.

[0245] In the fourth embodiment, regarding the control exclusion indoor unit (the fifteenth indoor unit 31: refer to Fig. 11C ), based on the time change rate of the current room temperature of each indoor unit 70 recorded by the time change rate recording unit 56 when the indoor unit 70 changes from the indoor unit heat on state to the indoor unit heat off state, the timing of the thermal state of the indoor unit (the fifteenth indoor unit 31) changing from the indoor unit heat on state to the indoor unit heat off state is predicted, and based on the prediction result (in Fig. 11C In the example of the predicted transition time t10, the set temperature of the indoor unit (the twelfth indoor unit 25) with the worst air-conditioning environment among the four indoor units 23, 25, 27, and 29 whose set temperatures have been changed to the power-saving set temperatures is returned to the predetermined set temperature before the change (the non-power-saving set temperature) at the timing of the predicted transition time t8. As a result, the twelfth indoor unit 25 is changed from the indoor unit heat-off state to the indoor unit heat-on state.

[0246] According to the fourth embodiment, in an integrated air conditioner 50, even when the set temperature is changed in the direction of power saving, the effect of the first embodiment which improves the air-conditioning environment of the room equivalent to a degraded room at the current time point and contributes to energy saving, as well as a further power saving effect can be obtained. In addition to the effect of the second embodiment which equally gives each of the multiple indoor units 70 the opportunity to change the set temperature to the set temperature for power saving, the effect of scheduling management of the set temperature of each of the multiple indoor units 70 in a timely and appropriate manner can also be expected in the integrated air conditioner 50.

[0247] As a result, the first outdoor unit 21 can be switched to the outdoor unit thermal off state (see Fig.12 After that, the outdoor unit will be switched to the outdoor unit heat-on state (refer to the outdoor unit heat-off state in the comparative example shown in FIG. Fig.12 The increase in power consumption generated at time t11) is suppressed before it occurs.

[0248] In addition, as the air conditioning control system 1 of the present invention, Figure 1As shown, the following structure may also be adopted: a building air conditioning system 13 having an air conditioning control device 11 and an air conditioner 50 provided in an integrated form, which are electrically connected via a communication medium 103, and each of a plurality of indoor units 70 notifies the air conditioning information of the indoor unit 70 to the air conditioning control device 11, and the air conditioning control device 11 calculates a change value of the set temperature in the power saving state (the set temperature during power saving) based on the set temperature of the indoor unit in the air conditioning information notified from the object indoor unit that does not conform to the exception, and notifies the indoor unit of the calculated change value of the set temperature.

[0249] With this configuration, a more specific configuration of the air-conditioning control system 1 can be presented for improving the air-conditioning environment of a room with low comfort and contributing to energy saving.

[0250] In addition, as an air-conditioning control method of the present invention, the following structure can also be adopted: the air-conditioning control method has the following steps: a step of obtaining air-conditioning information including an operating state, an indoor unit thermal state, a set temperature, and a current room temperature related to each of a plurality of indoor units 70; a step of adjusting the set temperature of the indoor unit 70 when switching the operating state of the air conditioner 50, and making a control instruction including the adjusted set temperature; and a step of sending the made control instruction to the indoor unit 70, in which, when the operating state of the air conditioner 50 is switched from a predetermined state to a power-saving state, a predetermined number of indoor units 70, including at least one indoor unit 70 whose indoor unit thermal state is an indoor unit heat-on state and whose value is inclined toward the anti-comfort side from the difference between the set temperature and the current room temperature, are taken as exceptions, and an adjustment is made to change the set temperature of the indoor units that do not meet the exception to the set temperature for power saving.

[0251] According to this configuration, it is possible to present a specific procedure of an air-conditioning control method for improving the air-conditioning environment of a room with low comfort and contributing to energy saving.

[0252] [Other implementation methods]

[0253] The above-described multiple embodiments represent examples of the present invention. Therefore, the technical scope of the present invention should not be interpreted in such a limited manner. This is because the present invention can be implemented in various ways without departing from its gist or its main features.

[0254] In addition, a part of the structure of the embodiment described here can be replaced with the structure of another embodiment, and a structure of another embodiment can be added to a structure of a certain embodiment. Furthermore, with respect to a part of the structure of each embodiment, other structures can be added, deleted, or replaced.

[0255] For example, as a building air conditioning system 13 having an integrated form of air conditioner 50 to which the air conditioning control device 11 according to the embodiment of the present invention is applied, Figure 1 As shown, the following method is illustrated for explanation: an air-conditioning system having two systems, a first air-conditioning system 41 and a second air-conditioning system 43, in a first air-conditioning machine 81 in an integrated form of the first air-conditioning system 41, one first outdoor unit 21 is combined with five eleventh to fifteenth indoor units 23, 25, 27, 29, 31, and on the other hand, in a second air-conditioning machine 83 of the second air-conditioning system 43, one second outdoor unit 33 is combined with one twenty-first indoor unit 37, but the present invention is not limited to this example.

[0256] The number of outdoor units 60 and indoor units 70 belonging to one air conditioning system (air conditioner 50) is arbitrary, and for example, an appropriate number of combinations such as two outdoor units 60 and five indoor units 70 may be used. In addition, the number of air conditioning systems belonging to one building air conditioning system 13 is also arbitrary as described above, and of course an appropriate number may be set.

[0257] Explanation of symbols

[0258] 1 Air conditioning control system

[0259] 11 Air conditioning control device

[0260] 13 Building air conditioning system

[0261] 15. Smart Meter

[0262] 17 Control Terminal

[0263] 19 Aggregation Coordinator System (Upper System)

[0264] 23a, 25a, 27a, 29a, 31a Individual refrigerant pipes

[0265] 45 Common refrigerant piping

[0266] 50 Air conditioner

[0267] 51 Target power setting unit

[0268] 53 Power consumption acquisition unit

[0269] 54 Control terminal function unit

[0270] 55 Air conditioning information acquisition unit

[0271] 56 Time change rate recording unit

[0272] 57 Control Instruction Production Department

[0273] 59 Control instruction sending unit

[0274] 60 Outdoor unit (air conditioner)

[0275] 61 Database

[0276] 63 Compressor

[0277] 70 Indoor unit (air conditioner)

[0278] 75 Temperature Sensor

[0279] 76 Outside air temperature sensor

[0280] 91CPU

[0281] 103, 105, 107 communication media.

Claims

1. An air conditioning control device for switching the operating state of an integrated air conditioner in which a separate refrigerant pipe of each of a plurality of indoor units is integrally connected to a common refrigerant pipe of an outdoor unit having a compressor to a predetermined state or a power-saving state, characterized in that: The air conditioning control device comprises: an air conditioning information acquisition unit that acquires air conditioning information including an operation state, a thermal state of the indoor unit, a set temperature, and a current room temperature related to each of the plurality of indoor units; a control instruction generating unit that adjusts the set temperature of the indoor unit when the operating state of the air conditioner is switched, and generates a control instruction including the adjusted set temperature; and a control instruction sending unit that sends the control instruction generated by the control instruction generating unit to the indoor unit, When the control instruction making unit switches the operating state of the air conditioner from the predetermined state to the power saving state, the control instruction making unit makes the following adjustments: among the indoor units whose thermal state is the indoor unit heat on state, at least a specified number of indoor units whose thermal state is the indoor unit heat on state and whose value is inclined toward the anti-comfort side from the difference between the set temperature and the current room temperature are taken as exceptions, and the set temperature of the indoor units that do not meet the exception is changed to the set temperature of the power saving state.

2. The air conditioning control device according to claim 1, characterized in that: When the operating state of the air conditioner is in the power saving state, the control instruction generating unit makes the following adjustment when at least one of the indoor units whose set temperature has been changed to the set temperature of the power saving state changes from the indoor unit heat OFF state to the indoor unit heat ON state: the set temperature of the indoor unit whose difference between the set temperature and the current room temperature is inclined toward the comfort side and which has not been changed to the set temperature of the power saving state as an exception is changed to the set temperature of the power saving state.

3. The air conditioning control device according to claim 1, characterized in that: The air conditioning control device further comprises: a time change rate recording unit for recording a time change rate of a current room temperature when the indoor unit thermal state associated with each of the indoor units is in an indoor unit thermal on state; When the delay time before the indoor unit thermal state of the indoor unit changes from the indoor unit thermal on state to the indoor unit thermal off state calculated based on the time change rate related to the indoor unit whose difference between the set temperature and the current room temperature is inclined toward the opposite comfort side among the indoor units whose set temperature has not been changed to the set temperature of the power saving state as an exception and whose set temperature is inclined toward the opposite comfort side is less than the prescribed time threshold, the control instruction making unit makes the following adjustment: the set temperature of the indoor unit whose difference between the set temperature and the current room temperature is inclined toward the opposite comfort side among the indoor units whose set temperature has been changed to the set temperature of the power saving state is returned to the set temperature before it was changed to the set temperature of the power saving state.

4. The air conditioning control device according to claim 3, characterized in that: The time change rate recording unit records a time change rate of a current room temperature when the indoor unit thermal state of each of the indoor units changes from an indoor unit thermal on state to an indoor unit thermal off state.

5. The air conditioning control device according to claim 1, characterized in that: The integrated air conditioner belongs to a plurality of air conditioning systems constituting a building air conditioning system. The air conditioning control device also has: a power consumption acquisition unit that acquires power consumption related to the building air conditioning system; as well as a target power setting unit for setting a target power which is a target value of power consumption of the entire building in which the building air conditioning system is installed, When the power consumption is greater than the target power, the control instruction generating unit generates a control instruction for switching the operation state of the air conditioner belonging to at least one of the plurality of air conditioning systems from the predetermined state to the power saving state.

6. The air conditioning control device according to claim 5, characterized in that: The target power setting unit sets the target power based on a power saving request obtained from a host system.

7. The air conditioning control device according to any one of claims 1 to 6, characterized in that: The air conditioning information acquisition unit further acquires a protection state related to energy saving as the air conditioning information. When the control instruction making unit switches the operating state of the air conditioner from the predetermined state to the power-saving state, the control instruction making unit makes the following adjustments: the indoor units among the multiple indoor units for which the protection state related to energy saving is set as the air-conditioning information are taken as exceptions, and the set temperatures of the indoor units that do not conform to the exceptions are changed to the set temperatures of the power-saving state.

8. An air conditioning control system comprising: an integrated air conditioner in which a separate refrigerant pipe of each of a plurality of indoor units is integrally connected to a common refrigerant pipe of an outdoor unit having a compressor; and an air conditioning control device for switching the operating state of the air conditioner to at least a predetermined state or a power-saving state, characterized in that: The air conditioning control device comprises: an air conditioning information acquisition unit that acquires air conditioning information including an operation state, a set temperature, a current room temperature, and a thermal state of the indoor unit related to each of the plurality of indoor units; a control instruction generating unit that adjusts the set temperature of the indoor unit when the operating state of the air conditioner is switched, and generates a control instruction including the adjusted set temperature; and a control instruction sending unit that sends the control instruction generated by the control instruction generating unit to the indoor unit, When the operating state of the air conditioner is switched from the predetermined state to the power-saving state, the control instruction making unit makes the following adjustments: among the indoor units whose thermal state is the indoor unit heat-on state, at least one of the specified number of indoor units whose thermal state is the indoor unit heat-on state and whose value is inclined toward the anti-comfort side from the difference between the set temperature and the current room temperature is taken as exceptions, and the set temperatures of the indoor units not meeting the exceptions are changed to the set temperature of the power-saving state; The indoor units that meet the exceptions perform air-conditioning control operations according to the set temperature, while the indoor units that do not meet the exceptions perform air-conditioning control operations according to the changed values ​​of the set temperature.

9. The air conditioning control system according to claim 8, characterized in that: The integrated air conditioner is electrically connected to the air conditioning control device via a communication medium. Each of the plurality of indoor units notifies the air conditioning information of the indoor unit to the air conditioning control device, The air conditioning control device calculates a change value of the set temperature in the power saving state based on the set temperature of the indoor unit in the air conditioning information notified from the indoor unit not meeting the exception, and notifies the indoor unit of the calculated change value of the set temperature.

10. An air conditioning control method for an air conditioning control device, which switches the operating state of an integrated air conditioner in which a separate refrigerant pipe of each of a plurality of indoor units is integrally connected to a common refrigerant pipe of an outdoor unit having a compressor to a predetermined state or a power-saving state, characterized in that: The air conditioning control method comprises the following steps: A step of acquiring air conditioning information including an operation state, a thermal state of the indoor unit, a set temperature, and a current room temperature related to each of the plurality of indoor units; When the operating state of the air conditioner is switched, the set temperature of the indoor unit is adjusted, and a control instruction including the adjusted set temperature is generated; as well as The step of sending the generated control instruction to the indoor unit, In the step of making the control indication, when the operating state of the air conditioner is switched from the predetermined state to the power-saving state, the following adjustment is performed: among the indoor units whose thermal state is the indoor unit heat-on state, at least a specified number of indoor units that are inclined toward the anti-comfort side from the difference between the set temperature and the current room temperature are taken as exceptions, and the set temperatures of the indoor units that do not meet the exceptions are changed to the set temperature of the power-saving state.

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