JP2019002604A - Air-conditioning control system - Google Patents

Abstract

To provide an air-conditioning control system capable of obtaining an optimal energy saving effect by appropriately performing schedule control of a plurality of air-conditioning apparatuses.SOLUTION: An air-conditioning control system includes: at least one indoor unit; at least one outdoor unit connected to the at least one indoor unit via a refrigerant circuit; demand control means provided in each of the at least one outdoor unit to switch a state of the outdoor unit to a first state where electric power use amount is not limited, a second state where the electric power use amount is limited to a predetermined rate or a third state where the electric power use amount is limited to approximately zero; and schedule control means for controlling the demand control means of the at least one outdoor unit on the basis of predetermined schedule and performing switching control of the electric power use amount of the at least one outdoor unit to the first state, the second state or the third state. The schedule control means performs the schedule control of the demand control means on the basis of control details set in accordance with seasons and time so that a coefficient of performance COP of the outdoor unit exceeds 1.0.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an air conditioning control system that schedules one or more installed air conditioning equipment.

  As an air conditioner that performs schedule control, Patent Literature 1 creates operating time commands for heaters, air conditioners, and the like for maintaining each room at a predetermined temperature based on a seasonal command corresponding to a seasonal transition determination. It is described that the operation time of a heater, an air conditioner or the like is adjusted so that the room is kept at a predetermined temperature by transmitting.

  Further, Patent Document 2 describes a schedule control device that can set a schedule at the start of operation of an air conditioner or at the end of operation, and adjusts a set temperature for each set time.

  Both of these schedule control devices described in Patent Documents 1 and 2 perform schedule control of the operation start and operation end of the air conditioner so that the room temperature becomes the set temperature.

JP 2004-028440 A JP 2005-337614 A

  However, according to the conventional schedule control device described in Patent Documents 1 and 2, it is possible to schedule the room temperature to the set temperature, but appropriately reduce the total amount of power consumed by the air conditioning equipment. It was not possible to expect the optimum energy saving effect. In addition, these conventional schedule control devices are devices designed to perform schedule control from the stage of manufacturing air conditioning equipment, and are scheduled for existing general air conditioning equipment that does not have such a schedule control function. Control could not be applied.

  Accordingly, an object of the present invention is to provide an air conditioning control system capable of obtaining an optimal energy saving effect by appropriately scheduling a plurality of air conditioning devices.

  Another object of the present invention is to provide an air conditioning control system capable of performing schedule control for general air conditioning equipment that does not have a schedule control function.

  According to the present invention, the air conditioning control system is provided in each of at least one indoor unit, at least one outdoor unit connected to the at least one indoor unit via a refrigerant circuit, and at least one outdoor unit. In order to switch the state of the outdoor unit to the first state where the power consumption is not limited, the second state where the power usage is limited to a predetermined ratio, or the third state where the power usage is limited to almost zero. And the demand control means of at least one outdoor unit based on a predetermined schedule, and the power usage of at least one outdoor unit is set to the first state, the second state, or the third state. And schedule control means for switching control. The schedule control means schedules the demand control means with the control content set according to the season and time so that the coefficient of performance COP by the outdoor unit exceeds 1.0.

  When the schedule control means controls the demand control means of the outdoor unit according to the season and time, the coefficient of performance COP by the outdoor unit is controlled to exceed 1.0, so the room temperature is set according to the schedule. While being able to control to preset temperature, total electric energy can be reduced according to a season and time, and it becomes possible to acquire the optimal energy-saving effect.

  The schedule control means schedules the demand control means so that the outdoor unit is in a first state first and then in a second state until a predetermined time in the morning from winter morning. It is preferable to do.

  The schedule control means schedule-controls the demand control means so that the outdoor unit is in the first state first and then in the second state from the summer noon to the predetermined time in the afternoon. It is also preferable to do.

  In this case, the apparatus includes a plurality of indoor units provided in the same building and a plurality of outdoor units respectively connected to the plurality of indoor units via a refrigerant circuit, and the schedule control means includes a plurality of indoor units. The unit and the plurality of outdoor units are divided into a plurality of groups, and the rotation operation is performed so that the states of the plurality of groups of outdoor units repeat the first state and the second state alternately. More preferably.

  It is also preferable that the schedule control unit schedule-controls the demand control unit so that the outdoor unit is first in the second state and then in the third state in the spring and autumn.

  In this case, the apparatus includes a plurality of indoor units provided in the same building and a plurality of outdoor units respectively connected to the plurality of indoor units via a refrigerant circuit, and the schedule control means includes a plurality of indoor units. The unit and the plurality of outdoor units are divided into a plurality of groups, and the plurality of groups of outdoor units are configured to rotate so that the states of the plurality of groups of outdoor units alternately repeat the second state and the third state. More preferably.

  It is also preferable that the schedule control unit schedule-controls the demand control unit so that the outdoor unit is in the first state when the outdoor unit is on a regular holiday or a closed day.

  According to the present invention, the room temperature can be controlled to a set temperature according to the schedule, and the total amount of power can be reduced according to the season and time, so that an optimum energy saving effect can be obtained. In addition, it is possible to perform schedule control for general air conditioning equipment that does not have a schedule control function.

It is a block diagram showing roughly the whole system configuration in one embodiment of the air-conditioning control system of the present invention. It is a figure which shows the flow of the signal between each element in the air-conditioning control system of FIG. It is a figure showing the relationship between the load factor of an air-conditioning apparatus (air conditioner) controlled by the air-conditioning control system of FIG. 1, and COP. It is a flowchart which shows roughly the processing flow of the schedule control in the air-conditioning control system of FIG. It is a figure explaining the effect acquired by the air-conditioning control system of FIG. It is a figure showing transition of the annual air-conditioning electric energy in the air-conditioning control system of FIG. It is a figure showing transition of the air-conditioning electric energy at the time of the start-up of winter at the time of not carrying out schedule control, and when carrying out schedule control, and room temperature. It is a figure showing transition of the air-conditioning electric energy and the average load factor at the peak of summer when schedule control is not performed and when schedule control is performed by rotation operation. It is a figure showing transition of the air-conditioning electric energy and the average load factor of the spring and autumn when not carrying out schedule control and carrying out schedule control by rotation operation.

  FIG. 1 schematically shows the overall system configuration in an embodiment of the air conditioning control system of the present invention, and FIG. 2 shows the flow of signals between the elements in the air conditioning control system of the present embodiment.

  As shown in FIG. 1, the air conditioning control system in the present embodiment is installed outdoors with an indoor unit 11 provided in a building 10, and is connected to the indoor unit 11 via a refrigerant circuit 12. And an outdoor unit 13. In the illustrated example, a single indoor unit 11 is provided in the building 10, and one indoor unit is constituted by the indoor unit 11 and the outdoor unit 13, but a plurality of indoor units are connected to a single outdoor unit. You may make it correspond to a machine. It should be noted that a plurality of indoor units are provided in the building 10 and a plurality of outdoor units corresponding to the indoor units are provided outdoors, and are configured so that they can be grouped and controlled separately (group control). Also good. In the present embodiment, as shown in the figure, a plurality of outdoor units other than the outdoor unit 13 are provided, and each outdoor unit has a refrigerant circuit in one or more indoor units provided in a building not shown. Connected through.

  In the building 10, a temperature sensor 14 for detecting the indoor temperature and a corresponding distribution board 15 for the outdoor unit 13 or its input / output electric wires are attached to measure the electric energy of the outdoor unit 13. A current sensor (CT sensor) 16 for detecting current and a gateway device (GW device) 17 connected to the temperature sensor 14 and the CT sensor 16 are provided. In the present embodiment, the room temperature information detected by the temperature sensor 14 is configured to be transmitted to the GW device 17 wirelessly, and the current information detected by the CT sensor 16 is transmitted to the GW device 17 by wire. It is configured as follows. The GW device 17 is connected to an IPC cloud server 18 that is a server on the cloud using an IPC (inter-process communication) channel via a high-speed wireless line employing LTE (next-generation high-speed portable communication standard) or the like. Yes. A demand control device 19 that sends a contact signal for demand control is connected to a control terminal of a contact control interface (for example, a demand adapter) of a plurality of outdoor units including the outdoor unit 13 by wire. The demand control device 19 is connected to the IPC cloud server 18 via a high-speed wireless line adopting LTE or the like, and various contact signals based on schedule control information and time sent from the IPC cloud server 18. It has a computer function to create and output.

  In the present embodiment, two demand control devices 19 connected to each other by a LAN are provided, and each demand control device 19 is connected to a demand control terminal of a plurality of (up to eight in this embodiment) outdoor units. Wired connection.

  As shown in FIG. 2, schedule control information of the air conditioning control system is registered in the IPC cloud server 18 in advance, and control initial settings such as target outdoor unit information for specifying an outdoor unit to be controlled are included. Initial setting information including initial setting information for measurement such as information and information for designating a temperature sensor and a CT sensor to be measured is registered. The IPC cloud server 18 is configured to send control initial setting information such as target outdoor unit information at the time of initial setting and schedule control information of the outdoor unit for each season. Has been. Conversely, control state information representing the control state of the air conditioner to be controlled, that is, the control state of the outdoor unit 13 is sent from the demand control device 19 to the IPC cloud server 18. Also, initial setting information for measurement such as target temperature sensor and CT sensor information is sent from the IPC cloud server 18 to the GW device 17 at the time of initial setting. The temperature sensor 14 measures the temperature of the initially set measurement target area, in this embodiment, the room 10, and the measurement result is sent from the GW device 17 to the IPC cloud server 18. The CT sensor measures the current of the initially set air conditioning equipment to be measured, in this embodiment, the outdoor unit 13, and the measurement result is sent from the GW device 17 to the IPC cloud server 18.

  The IPC cloud server 18 includes a plurality of GW devices including the GW device 17 and a plurality of demand control apparatuses including the demand control apparatus 19, a wireless communication apparatus that transmits and receives information and instructions via a high-speed wireless line, a server body, And a database storing schedule control information for each air conditioner (outdoor unit) of the server main body, and based on the predetermined schedule control information stored in the database, Perform demand control. This demand control is a schedule control for 365 days and 24 hours. The outdoor unit is in a first state (100% control, no demand control) in which the power usage is not limited, and the power usage is predetermined. Switch to the second state (for example, 40% control) that limits the ratio, or the third state (thermo-off) that limits the power consumption to almost zero, and the coefficient of performance COP by each outdoor unit exceeds 1.0 As described above, the schedule control is performed with the control content set according to the season and time. In this embodiment, the state of the outdoor unit is controlled to the three states of the first state, the second state, and the third state, but the number of states to be controlled is limited to three in this way. Four or more may be sufficient. Further, although the second state is 40% control, this ratio may be other values exceeding 0% and less than 100%. Furthermore, the control time of the first state, the second state, and the third state is not limited to the time described later.

  FIG. 3 shows the relationship between the load factor and the coefficient of performance COP of the air conditioner (outdoor unit, air conditioner) controlled by the air conditioning control system of the present embodiment. By performing demand control of the outdoor unit based on the schedule control information determined in advance as described above, the air conditioner is not operated in the inefficient load factor area 30 where the COP is 1.0 or less. Can be operated in a high COP area (area 31 with an efficient load factor, area where the load factor is close to 50%).

The coefficient of performance COP (Coefficient of Performance) is an index indicating the consumption efficiency of the air conditioner, and is a value indicating the amount of electric power used to keep the air at a constant temperature, and is obtained by the following equation.
COP = (Rated cooling or heating capacity (kW)) / (Rated power consumption (kW))
The higher the COP value, the higher the efficiency of air conditioning. The lower the COP value, the lower the efficiency. Therefore, if the schedule control is performed so as to improve the COP, the amount of power used for air conditioning can be reduced. In other words, if schedule control is performed so that the COP exceeds 1.0, the room temperature can be controlled to a set temperature according to the schedule, and the total power consumption can be reduced according to the season and time, so that the optimum energy saving effect can be achieved. Can be obtained.

  FIG. 4 schematically shows a process flow of schedule control in the air conditioning control system of the present embodiment. The server body of the IPC cloud server 18 executes a schedule control process as shown in the figure according to the installed control program.

  First, an air conditioner (outdoor unit) to be controlled is determined (step S1). Next, with reference to the database, it is determined whether or not the control target area of the air conditioner is an area where schedule control is to be performed (step S2). When it is determined that the air conditioner is in an area where schedule control is not performed (in the case of NO), a signal instructing to execute 100% control (no demand control, contact 0 control) for 24 hours is supplied to the air conditioner. Transmit to the device using LTE (step S3). Thus, the demand control device outputs a contact 0 signal for turning on the contact 0 of the demand control terminal of the outdoor unit to the control terminal for 24 hours.

  When it is determined in step S2 that the air conditioner is in the area where the schedule control is to be performed (in the case of YES), the database and the current date are referred to, and the control target area of the air conditioner is a regular holiday, a closed day, or It is determined whether it is a special holiday (step S4). When it is determined that it is a regular holiday, a closed day, or a special closed day (in the case of YES), the process proceeds to the above-described step S3, and a signal instructing to perform 100% control (no demand control, contact 0 control) for 24 hours Is transmitted to the demand control device of the air conditioner using LTE. Thus, the demand control device outputs a contact 0 signal for turning on the contact 0 of the demand control terminal of the outdoor unit to the control terminal for 24 hours.

  If it is determined in step S4 that it is not a regular holiday, a closed day, or a special closed day (in the case of NO), the database and the current month / day are referred to read out the daily schedule control information of the air-conditioning equipment and the air-conditioner It transmits to the demand control apparatus of an apparatus using LTE (step S5). Thereby, the demand control device creates a contact signal for each time and outputs it to the demand control terminal of the outdoor unit. The demand control device is configured to generate a contact signal based on the previously received daily schedule control information and output it to the demand control terminal until the next schedule control information is received.

  Table 1 shows an example of schedule control for the air conditioner according to the date (season) and time.

  In this schedule control, for example, if the date is December 10 of winter, 100% control (no demand control) is performed for 20 minutes from 00:00 to 10:00 (operation 1), and then 40 % Control (contact 1 control) is performed for 10 minutes (operation 2), and the cycle of operation 1 and operation 2 every 30 minutes is repeated until 10:00. From 10 o'clock to 24 o'clock, 40% control is performed for 50 minutes (operation 1), then 0% control (contact 2 control) is performed for 10 minutes (operation 2), and operation 1 and operation 2 are performed until 24:00. This is a control to repeat the cycle.

  In this schedule control, the demand control device receives one day of schedule control information for the corresponding month and day from the IPC cloud server 18 and turns on contact 0 of the demand control terminal of the outdoor unit from 00:00 to 10:00. The contact 0 signal is output for 20 minutes, and then the contact 1 signal for turning on the contact 1 is output for 10 minutes. From 10:00 to 24:00, the contact 1 signal for turning on the contact 1 of the demand control terminal of the outdoor unit is output for 50 minutes, and then the contact 2 signal for turning on the contact 2 is continuously output for 10 minutes.

  Also, for example, if the date is August 1 of summer, 100% control (no demand control) is performed for 20 minutes from 00:00 to 16:00 (operation 1), and then 40% control ( (Contact 1 control) is performed for 10 minutes (operation 2), and the cycle of operation 1 and operation 2 every 30 minutes is repeated until 16:00. From the time of 16:00 to 24:00, the 40% control is performed continuously.

  In this schedule control, the demand control device receives one day of schedule control information for the corresponding month and day from the IPC cloud server 18 and turns on the contact 0 of the demand control terminal of the outdoor unit from 00:00 to 16:00. The contact 0 signal is output for 20 minutes, and then the contact 1 signal for turning on the contact 1 is output for 10 minutes. From 16:00 to 24:00, the output of the contact 1 signal for turning on the contact 1 of the demand control terminal of the outdoor unit is continued.

  For example, if the date is April or October in spring or autumn, 40% control (contact 1 control) is performed for 40 minutes from 00:00 to 24:00 (operation 1), and then 0% Control (contact 2 control) is performed for 20 minutes (operation 2), and the cycle of operation 1 and operation 2 is repeated every 24 hours and 1 hour.

  In this schedule control, the demand control device receives one day of schedule control information for the corresponding month and day from the IPC cloud server 18 and turns on the contact 1 of the demand control terminal of the outdoor unit from 00:00 to 24:00. The contact 1 signal is output for 40 minutes, and then the contact 2 signal for turning on the contact 2 is output for 20 minutes.

  Thereafter, the IPC cloud server 18 determines whether or not the schedule control has been performed for all the air-conditioning equipment (step S6). If it is determined that the schedule control has not been performed (NO), the process returns to step S1 and repeats the above-described processing. In step S6, when it is determined that the schedule control has been performed for all the air conditioners (in the case of YES), the schedule control process is terminated.

By performing such schedule control, the following effects can be obtained.
(1) The rise of winter Especially at 07:00 to 10:00 from December 1 to March 31 (in stores, companies, etc., it may be different time depending on business hours), contact 0 (100% control) The cycle of contact 1 (40% control) for 10 minutes is repeated for 10 minutes, and normal control is performed after 10:00. At the start of winter, the difference between the outside air temperature and the desired room temperature is often large, and since heat is required until the heat is stored, heat storage is promoted as a minimum demand control at the start. After that, by starting normal control from a predetermined time (10 o'clock in this example), an energy saving effect can be obtained while maintaining comfort.
(2) Summer peak From July 1st to September 30th, especially from 12:00 to 16:00, contact 0 (100% control) is repeated for 20 minutes, and contact 1 (40% control) is repeated for 10 minutes. Since the outside air temperature is high at the peak of summer, the temperature rise is suppressed as a minimum demand control at the peak, and the normal control is performed outside the peak to obtain an energy saving effect while maintaining comfort. be able to.
(3) Spring and Autumn (off season)
Contact 1 (40% control) is 40 minutes and contact 2 (0% control, thermo-off) is 20 on April 1 to June 30 and all days (24 hours) from October 1 to November 30. Repeat the minute cycle. Since the load factor of the air conditioner is low and the COP is reduced during the off-season of spring and autumn, control including the thermo-off is performed during this off-season, especially when a plurality of air-conditioners are installed in the room. Thus, an energy saving effect can be obtained while maintaining comfort.
(4) Regular holiday, closed day, or special closed day Since air conditioning is not basically performed on this day, an energy saving effect is obtained by not performing demand control as contact 0 (100% control) for 24 hours. Only when necessary, it operates with temperature control of the air conditioner itself.

  FIG. 5 explains the effects obtained by the air conditioning control system of the present embodiment, and shows that surplus air conditioning power can be reduced by performing schedule control. That is, when the amount of air-conditioning power before control is controlled by 50%, for example, the broken line portion above 50% is reduced, and further, the COP for the first negative is improved in the field below 50%.

  FIG. 6 shows the results of actual measurement of the annual change in the air conditioning power amount in the air conditioning control system of the present embodiment. The horizontal axis represents the date and the vertical axis represents the air conditioning power amount. As shown in the figure, in the winter 60 from January to March, the air-conditioning power amount is considerably large on average, and its peak is in the morning. In summer 61 from July to August, the amount of air-conditioning power is large on average, and its peak is in the afternoon. Air conditioning is not used much in the spring 62 from April to May and the autumn 63 in October, and the load factor is also low because the amount of air conditioning power is low even during use.

  FIG. 7 shows changes in the amount of air-conditioning power and the room temperature at the start of winter when schedule control is not performed and when schedule control is performed. In the figure, the horizontal axis represents time, and the vertical axis represents the amount of air conditioning power and room temperature. In addition, a does not perform schedule control, and the air-conditioning power amount when demand control is performed so that the room temperature is within the range of 17 ° C. to 28 ° C. of the occupational health and safety law, b is the room temperature in that case, and c is 00:00 to 00 10:00 is 100% control, 10: 0 to 24:00 is schedule control of 40% control, and demand control is performed so that the room temperature is within the range of 17 ° C to 28 ° C of the Occupational Health and Safety Act. The air conditioning power amount, d, represents the room temperature in that case.

  When the schedule control was not performed, the room temperature b was 17.1 ° C. at 08:00 and was within the room temperature range of the Industrial Safety and Health Act, so 40% control was started. When the schedule control was not performed in this way, the control was 40%, so that the room temperature b was difficult to rise and did not reach 20 ° C. in the morning. It was 14:00 that the temperature reached 20 ° C. On the other hand, when schedule control is performed, the room temperature d is 17.5 ° C. at 08:00. At 09:00, the room temperature d was 20.1 ° C. when the schedule was controlled, but the room temperature b was 17.2 ° C. when the schedule was not controlled. At 10:00, the room temperature d was 21.6 ° C. when the schedule was controlled, but the room temperature b was 17.4 ° C. when the schedule was not controlled. When schedule control is performed, 40% control is performed after 10:00.

  FIG. 8 shows the transition of the air conditioning power amount and the average load factor at the peak of summer when the schedule control is not performed and when the schedule control is performed by the rotation operation. In the figure, the horizontal axis represents time, and the vertical axis represents air conditioning power amount and average load factor. In addition, e is an average load factor when schedule control is not performed, and f is one group when schedule control is performed by rotating operation with 60% intervals of 100% control and 40% control by dividing the air-conditioning equipment into two groups. Represents the amount of air conditioning power.

  When the schedule control is not performed, the average load factor e is constant at about 30% throughout the day. On the other hand, when a plurality of air conditioners are divided into two groups and schedule control is performed in which 100% control and 40% control are rotated at intervals of 60 minutes, the air conditioning power f of one group is an average. The load factor increased and the energy saving effect improved. Even if 100% control and 40% control were alternately operated without rotating, it was confirmed that the average load factor increased and the energy saving effect was improved.

  FIG. 9 shows changes in the amount of air-conditioning power and the average load factor in the spring and autumn when the schedule control is not performed and when the schedule control is performed in the rotation operation. In the figure, the horizontal axis represents time, and the vertical axis represents air conditioning power amount and average load factor. In addition, g is an average load factor when schedule control is not performed, and h and i are 2 when the air conditioner is divided into two groups and schedule control is performed by rotation operation of 60% intervals of 100% control and 40% control. Each group represents air conditioning power.

  When the schedule control is not performed, the average load factor g is constant at about 15% throughout the day. On the other hand, when a plurality of air conditioners are divided into two groups and schedule control is performed in which 40% control and 0% control (thermo-off) are rotated at intervals of 30 minutes, the air conditioning power amount h of the two groups And i increased the average load factor and improved the energy saving effect. It was confirmed that even if 40% control and 0% control were alternately operated without rotating operation, the average load factor increased and the energy saving effect was improved.

  In the air conditioning control system of the present invention, the IPC cloud server 18 receives room temperature information detected by the temperature sensor 14 via the GW device 17, and if the room temperature is outside a specified temperature range (for example, 17 ° C to 28 ° C), The demand control based on the schedule may be forcibly canceled, and the demand control may be resumed when the room temperature returns to the specified temperature range.

  In the schedule control described above, one day of schedule control information for the corresponding month and day is sent from the IPC cloud server 18 to the demand control device, and the demand control device performs individual control based on this one day of schedule control information. Demand control is performed by creating contact signals. According to such control, the amount of communication between the IPC cloud server 18 and the demand control device is reduced, and the load on the LTE radio line can be reduced. However, in the air conditioning control system of the present invention, each contact signal corresponding to one day of schedule control information is created on the IPC cloud server 18 side, and this contact signal is transmitted to the demand control device to perform demand control. You may comprise as follows.

  All the embodiments described above are illustrative of the present invention and are not intended to be limiting, and the present invention can be implemented in other various modifications and changes. Therefore, the scope of the present invention is defined only by the claims and their equivalents.

DESCRIPTION OF SYMBOLS 10 Building 11 Indoor unit 12 Refrigerant circuit 13 Outdoor unit 14 Temperature sensor 15 Distribution board 16 CT sensor 17 GW device 18 IPC cloud server 19 Demand control apparatus

Claims (7)

At least one indoor unit, at least one outdoor unit connected to the at least one indoor unit via a refrigerant circuit, and each of the at least one outdoor unit, the state of the outdoor unit A demand control means for switching to a first state in which the usage amount is not limited, a second state in which the power usage amount is limited to a predetermined ratio, or a third state in which the power usage amount is limited to substantially zero; Based on the schedule, the demand control means of the at least one outdoor unit is controlled, and the power usage of the at least one outdoor unit is switched to the first state, the second state, or the third state. And schedule control means to
The air-conditioning control system characterized in that the schedule control means schedule-controls the demand control means with the control content set according to the season and time so that the coefficient of performance COP by the outdoor unit exceeds 1.0. .   The schedule control means is configured to repeat the demand control so that the outdoor unit is in the first state first and then in the second state from a winter morning to a predetermined time in the morning. The air conditioning control system according to claim 1, wherein the means is subjected to schedule control.   The schedule control means is configured to control the demand control so as to repeat that the outdoor unit is in the first state first and then in the second state from summer noon to a predetermined time in the afternoon. The air conditioning control system according to claim 1 or 2, wherein the means is subjected to schedule control.   A plurality of indoor units provided in the same building, and a plurality of outdoor units respectively connected to the plurality of indoor units via a refrigerant circuit, and the schedule control means includes the plurality of indoor units And the plurality of outdoor units are divided into a plurality of groups, and the rotation operation is performed so that the states of the outdoor units of the plurality of divided groups alternately repeat the first state and the second state. The air-conditioning control system according to claim 3.   The schedule control means schedules the demand control means so that the outdoor unit is first in the second state and then in the third state in spring and autumn. The air-conditioning control system according to any one of claims 1 to 4, wherein   A plurality of indoor units provided in the same building, and a plurality of outdoor units respectively connected to the plurality of indoor units via a refrigerant circuit, and the schedule control means includes the plurality of indoor units And the plurality of outdoor units are divided into a plurality of groups, and the rotation operation is performed so that the states of the outdoor units of the plurality of divided groups repeat the second state and the third state alternately. The air conditioning control system according to claim 5, wherein   7. The schedule control unit according to claim 1, wherein the schedule control unit schedules the demand control unit so that the outdoor unit is in the first state when the outdoor unit is closed or closed. The air conditioning control system according to claim 1.