Air conditioning system, air conditioning system control methods and programs

Abstract

This disclosure provides an air conditioning system that can suppress the increase in energy consumption of the air conditioning device caused by changes in the set temperature. The air conditioning system of this disclosure is an air conditioning system that uses an air conditioning device to conditioned space, and includes: a memory unit that stores the number of times the set temperature of the air conditioning device has been changed for each set temperature of the air conditioning device; and a determination unit that determines the set temperature to be set on the air conditioning device based on the number of changes stored in the memory unit.

Description

Air conditioning system, control method and program for an air conditioning system The present disclosure relates to an air conditioning system, a control method for an air conditioning system, and a program. Patent Document 1 discloses a technique for changing the set temperature of an air conditioner in stages in response to changes in the external air temperature. Prior Art Documents Patent Documents Patent Document 1: Japanese Patent Application Laid-Open No. 2005-061716 Problems to be Solved by the Invention The present disclosure provides an air conditioning system, a control method for an air conditioning system, and a program that can suppress an increase in the energy consumption of an air conditioning device due to a change in the set temperature. Means for Solving the Problems The air conditioning system in the present disclosure air-conditions an air-conditioned space by means of an air conditioning device, and the air conditioning system includes: a memory unit that stores the number of times of change in the set temperature of the air conditioning device for each set temperature of the air conditioning device; and a determination unit that determines the set temperature to be set for the air conditioning device based on the number of times of change stored in the memory unit. Furthermore, the control method for the air conditioning system in the present disclosure air-conditions an air-conditioned space by means of an air conditioning device, and the control method for the air conditioning system is: storing the number of times of change in the set temperature of the air conditioning device for each set temperature of the air conditioning device; and determining the set temperature to be set for the air conditioning device based on the stored number of times of change. Furthermore, the program in the present disclosure causes a computer of an air conditioning system that air-conditions an air-conditioned space by means of an air conditioning device to function as a determination unit, and the determination unit determines the set temperature to be set for the air conditioning device based on the number of times of change stored in a memory unit that stores the number of times of change in the set temperature of the air conditioning device for each set temperature of the air conditioning device. Moreover, the entire content of Japanese Patent Application: Japanese Patent Application No. 2023-170023 filed on September 29, 2023 is included in this specification. Effects of the Invention The air conditioning system, the control method for the air conditioning system, and the program in the present disclosure determine the set temperature to be set for the air conditioning device based on the number of times of change in the set temperature of the air conditioning device. Thereby, since it becomes possible to set the set temperature of the air conditioning device to a temperature with a lower possibility of making the user feel uncomfortable, the number of times the user changes the set temperature of the air conditioning device can be reduced. Accordingly, an increase in the energy consumption of the air conditioning device due to a change in the set temperature can be suppressed. Modes for Carrying Out the Invention (Knowledge and Insights on which the Present Disclosure is Based) At the time when the inventors came up with the present disclosure, there was already a technology for changing the set temperature of an air conditioning device in response to changes in the external air temperature. However, even if the set temperature of the air conditioning device is changed according to the external air temperature, the comfort of the air-conditioned space may not necessarily be ensured. Therefore, in order to demand the comfort of the air-conditioned space, it may happen that the user changes the set temperature of the air conditioning device. Generally speaking, when the set temperature of the air conditioning device is changed, there is a tendency for the user to demand excessive comfort. The inventors have found the following problem: when the set temperature is changed, the energy consumption of the air conditioning device is likely to increase, and thus the present disclosure is finally constituted to solve this problem. Furthermore, demanding excessive comfort means, for example, setting the set temperature lower than necessary during cooling operation, and setting the set temperature higher than necessary during heating operation. Thus, the present disclosure provides an air conditioning system, a control method for an air conditioning system, and a program that can suppress an increase in the energy consumption of the air conditioning device caused by a change in the set temperature. Hereinafter, embodiments will be described in detail with reference to the drawings. However, sometimes detailed descriptions that are unnecessary will be omitted. For example, sometimes detailed descriptions of well-known matters or repeated descriptions of substantially the same configurations will be omitted. Furthermore, the attached drawings and the following description are provided to enable those of ordinary skill in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims by these. (Embodiment 1) [1-1. Configuration] [1-1-1. Configuration of the Air Conditioning System] FIG. 1 is a diagram showing the configuration of the air conditioning system 1000. The air conditioning system 1000 is a system for air conditioning the air-conditioned space S by the air conditioning device 1. Examples of the air conditioning of the air-conditioned space S include cooling, heating, dehumidification, air supply, and ventilation. In the present embodiment, the case where the air-conditioned space S is cooled and heated by the air conditioning device 1 will be described. The air-conditioned space S is a space possessed by the facility H and is a space air-conditioned by the air conditioning device 1. Furthermore, examples of the facility H include a house, an office, a store, a medical facility, and a public facility. The air conditioning system 1000 includes an air conditioner 1. In FIG. 1, the air conditioning system 1000 includes four or more air conditioners 1. Furthermore, the number of air conditioners 1 included in the air conditioning system 1000 is not limited to four or more, and may also be less than four. The air conditioner 1 includes an indoor unit 11 and an outdoor unit 12, and performs air conditioning operation through the indoor unit 11 and the outdoor unit 12 to condition the air-conditioned space S where the indoor unit 11 is installed. The air conditioner 1 is connected to the network NW and communicates with the machines connected to the network NW. The network NW is a communication network composed of a public line, a dedicated line, the Internet, or other communication networks. The air conditioning system 1000 includes a terminal device 2. The terminal device 2 is a terminal used by the manager P of the facility H. Furthermore, the manager P is not limited to a person, and may also be a subject having the management authority of the facility H (for example, a company operating the facility H). Although the terminal device 2 shown in FIG. 1 is a laptop computer, it may also be a tablet computer, a desktop computer, or a smart phone. The terminal device 2 is connected to the network NW. The terminal device 2 displays information related to the air conditioner 1 such as the power consumption per facility H. The air conditioning system 1000 includes a management server 3. The management server 3 is a server device that manages the air conditioner 1. The management server 3 is connected to the network NW and performs information processing with the air conditioner 1 and the terminal device 2 as clients. Furthermore, the management server 3 may also be a server device owned by the manager P, or may not be a server device owned by the manager P. The air conditioning system 1000 includes a weather server 4. The weather server 4 is a server device that provides weather data services. The weather data provided by the server includes at least the forecast value of the outside air of the facility H. Furthermore, in each figure, although each of the management server 3 and the weather server 4 is represented by one block, this does not necessarily mean that the management server 3 and the weather server 4 are composed of a single device. For example, the management server 3 and the weather server 4 may also be composed of a plurality of server devices with different processing contents, or may be composed of the same server device. [1-1-2. Configuration of the air conditioner] Referring to FIG. 1, the configuration of the air conditioner 1 will be described. The air conditioner 1 includes an indoor unit 11, an outdoor unit 12, a remote controller 13, and a communication device 14. Furthermore, the number of indoor units 11 and outdoor units 12 included in the air conditioner 1 may also be plural. The indoor unit 11 and the outdoor unit 12 are connected by a refrigerant pipe and a control wiring. Thereby, in the air conditioner 1, a refrigerant cycle can be formed by the indoor unit 11 and the outdoor unit 12. The remote controller 13 is installed on the wall surface of the air-conditioned space S or the like. The remote controller 13 is provided with a plurality of operation buttons for the user of the air conditioner 1 to perform operations such as starting or stopping the operation, menu operation, cursor key operation, etc. Further, the remote controller 13 is provided with a display panel for displaying, for example, the set temperature of the air conditioner 1 or the operation state of the indoor unit 11, etc. The communication device 14 is a device connected to the network NW and communicating with the management server 3. Further, the communication device 14 may also be a device for controlling each part of the air conditioner 1. The communication device 14 sends the operation data RD to the management server 3 every time there is a change in the set temperature of the air conditioner 1. The operation data RD is data indicating that a change operation of the set temperature has been accepted. The operation data RD records the air conditioner ID (Identification), the change date and time, the type of air conditioner, the set temperature before the change, and the set temperature after the change. The air conditioner ID is identification information of the air conditioner 1. The change date and time is the date and time when the set temperature of the air conditioner 1 has been changed. The type of air conditioner is the type of air conditioning being performed by the air conditioner 1, which in this embodiment shows cooling or heating. The set temperature before the change is the set temperature of the air conditioner 1 before the change. The set temperature after the change is the set temperature of the air conditioner 1 after the change. The communication device 14 receives the set data SD from the management server 3. The set data SD is data for instructing the setting of the set temperature of the air conditioner 1, and records the set temperature to be set in the air conditioner 1. The communication device 14 operates the air conditioner 1 with the set temperature recorded in the received set data SD. [1-1-3. Configuration of the management server] FIG. 2 is a diagram showing the configuration of the management server 3. The management server 3 includes a server control device 30 and a server communication device 31. The server control device 30 is an example of a "computer". The server control device 30 includes a server processor 300 such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit), a server memory 310, and an interface circuit for connecting other devices or sensors. The server memory 310 is an example of a "memory unit". The server memory 310 is a memory for storing programs or data. The server memory 310 stores data that can be processed by the control program 311, the management DB (database) 312, and the server processor 300. The server memory 310 has a non-volatile memory area. Also, the server memory 310 may have a volatile memory area to form the working area of the server processor 300. The server memory 310 is constituted by, for example, a ROM (Read Only Memory) or a RAM (Random Access Memory). The control program 311 is an example of a "program". The management DB 312 is a database that manages data related to the air conditioner 1. The management DB 312 has one record R for each air conditioner 1. One record R records the air conditioner ID, communication information, the location of the facility H, the type of air conditioner, the current set temperature, the first management data MD1, and the second management data MD2. The communication information is information for communicating with the air conditioner 1, such as the address information of the communication device 14. The location of the facility H is the location of the facility H where the air conditioner 1 is installed, such as the address of the facility H. The current set temperature is the set temperature set in the air conditioner 1. The first management data MD1 is data for managing information related to the change in the set temperature of the air conditioner 1 during cooling. The second management data MD2 is data for managing information related to the change in the set temperature of the air conditioner 1 during heating. Hereinafter, when not distinguishing between the first management data MD1 and the second management data MD2, the symbol "MD" is attached and expressed as "management data MD". Figure 3 is a diagram showing an example of the first management data MD. In the first management data MD1, time periods at one-hour intervals from 0:00 to 23:59 are recorded. More specifically, in the first management data MD1, for each of the time periods from 0 o'clock to 23 o'clock, the time period from N:00 to N:59 is recorded. Here, N is an integer from 0 to 23. Also, in the first management data MD1, a plurality of outside air temperatures are recorded at 1°C intervals. The range of the outside air temperature recorded in the first management data MD includes at least the range of the temperature that the outside air of the facility H may become. Furthermore, the range of the outside air temperature recorded in the first management data MD1 may be set to the same range regardless of the location of the facility H, or may be set to different ranges according to the location of the facility H. The first management data MD1 records one piece of collected data AD for a combination of one time period and one external air temperature. The collected data AD is data having information related to the actual record of the change in the set temperature of the air conditioner 1. The collected data AD is data for collecting various data within a predetermined range of the set temperature. The set temperature to be set in the air conditioner 1 can be determined from the predetermined range of the set temperature shown in the collected data AD through the processing of the flowchart described later. The collected data AD records the set temperatures of a plurality of air conditioners 1 at intervals of 1°C within a predetermined range. In the example of FIG. 3, 23°C, 24°C, 25°C, 26°C, and 27°C are recorded in the collected data AD. That is, in the example of FIG. 3, the predetermined range of the set temperature shown in the collected data AD is the range of 23°C to 27°C. 1°C is an example of the "predetermined temperature". In the collected data AD, for each of the recorded set temperatures, the actual record number, the number of changes, and the change probability are recorded. In the example of FIG. 3, in the collected data AD, the actual record number, the number of changes, and the change probability are recorded for each of 23°C, 24°C, 25°C, 26°C, and 27°C. The actual record number indicates the number of times the corresponding set temperature has been set in the air conditioner 1. The number of changes indicates the number of times the corresponding set temperature has been changed to another set temperature. The change probability indicates the probability that the corresponding set temperature has been changed to another set temperature. The change probability is a probability calculated by dividing the corresponding number of changes by the corresponding actual record number. FIG. 4 is a diagram showing an example of the second management data MD2. The second management data MD2 has a different predetermined range of the set temperature shown in the recorded collected data AD compared to the first management data MD1. The collected data AD recorded in the first management data MD1 has a predetermined range of the set temperature in the range of 23°C to 27°C. In contrast, the collected data AD recorded in the second management data MD2 has a predetermined range of the set temperature in the range of 18°C to 23°C. Returning to the description of FIG. 2, the server communication device 31 includes hardware such as a communication circuit according to a predetermined communication specification, and communicates with the air conditioner 1, the terminal device 2, and the meteorological server 4 under the control of the server control device 30. The server processor 300 functions as a communication control unit 301, an acquisition unit 302, an update unit 303, a determination unit 304, and a setting unit 305 by reading and executing the control program 311 stored in the server memory 310. The communication control unit 301 communicates with the air conditioner 1, the terminal device 2, and the meteorological server 4 through the server communication device 31. The acquisition unit 302 acquires the outside air temperature. The acquisition unit 302 takes one record R as the object to be processed, and acquires the outside air temperature based on the record R of the object to be processed. To describe in detail, the acquisition unit 302 generates forecast value requirement information based on the record R of the object to be processed, and outputs the generated forecast value requirement information to the communication control unit 301. The forecast value requirement information refers to the information that requests the forecast value of the outside air temperature for the time period including the current time, and records the location of the facility H that has been recorded in the record R of the object to be processed and the time period of the object to be requested. For example, when the current time is H:M, the time period from H:00 to (H + 1):00 is recorded in the forecast value requirement information. Furthermore, H is an integer from 0 to 24, and M is an integer from 0 to 59. After receiving the forecast value requirement information from the acquisition unit 302, the communication control unit 301 sends the received forecast value requirement information to the meteorological server 4. Then, the communication control unit 301 receives a plurality of forecast values corresponding to the location of the facility H and the time period recorded in the sent forecast value requirement information from the meteorological server 4. The acquisition unit 302 calculates the average of the forecast values received by the communication control unit 301, and obtains the calculated average value as the outside air temperature. Furthermore, when calculating the average value of the forecast values, the acquisition unit 302 of the present embodiment can unconditionally discard the digits after the decimal point or round the digits after the decimal point. The update unit 303 updates the management DB 312. The update unit 303 updates the actual record number recorded in the collected data AD at L minutes per hour. The update unit 303 updates the actual record number for each record R. Here, L is an integer from 0 to 59, for example, 0. To describe in detail the update of the actual record number: when the update unit 303 is at L minutes per hour, first, the acquisition unit 302 is made to acquire the outside air temperature based on the record R of the object to be processed. Next, the update unit 303 refers to the management data MD of the record R of the object to be processed, and specifies the collected data AD corresponding to the combination of the time period including the current time and the outside air temperature that has been acquired by the acquisition unit 302. More specifically, when the air-conditioning type of the record R of the object to be processed is cooling, the update unit 303 specifies the collected data AD from the first management data MD1, and when the air-conditioning type of the record R of the object to be processed is heating, the collected data AD is specified from the second management data MD2. Then, the update unit 303 increments the actual record number corresponding to the current set temperature recorded in the record R of the object to be processed among the actual record numbers recorded in the specified collected data AD. Also, the update unit 303 updates the change probability corresponding to the incremented actual record number to the change probability that reflects the incremented actual record number. Here, referring to FIG. 5, the update of the actual record number will be described. FIG. 5 is a diagram for explaining the update of the actual record number. In the description of FIG. 5, an example is given where the current time when updating the actual record count is the 14 o'clock period, and the outside air temperature obtained by the obtaining unit 302 is 34°C. Also, in the description of FIG. 5, an example is given where the air conditioner 1 is performing cooling operation. In the case of FIG. 5, the updating unit 303 specifies, from the first management data MD1 recorded in the record R of the processing target, the collection data AD corresponding to the combination of the time period of the 14 o'clock period and the outside air temperature of 34°C. In the description of FIG. 5, an example is given where the current set temperature recorded in the record R of the processing target is 25°C. That is, in the description of FIG. 5, an example is given where the set temperature set in the air conditioner 1 is 25°C. In the case of FIG. 5, the updating unit 303 increments the actual record count corresponding to 25°C from "4" to "5" among the actual record counts recorded in the specified collection data AD. Also, in the case of FIG. 5, the updating unit 303 updates the change probability corresponding to 25°C from "3 / 4" to "3 / 5" along with the update of the actual record count. In addition, the update by the updating unit 303 will be described. When the communication control unit 301 receives the operation data RD, the updating unit 303 updates the management DB312 according to the received operation data RD. The updating unit 303 specifies the record R with the air conditioner ID of the received operation data RD from the management DB312. Then, the updating unit 303 updates the current set temperature of the specified record R to the changed set temperature recorded in the received operation data RD. Also, the updating unit 303 updates the air conditioner type of the specified record R to the air conditioner type recorded in the received operation data RD. Further, the update unit 303 causes the acquisition unit 302 to acquire the outside air temperature based on the record R specified by the received operation data RD. Next, when the air conditioner type of "cooling" is recorded in the received operation data RD, the update unit 303 specifies the collection data AD corresponding to the combination of the time period including the current time and the outside air temperature that has been acquired by the acquisition unit 302 from the first management data MD1 of the specified record R. Further, when the air conditioner type of "heating" is recorded in the received operation data RD, the update unit 303 specifies the collection data AD corresponding to the combination of the time period including the current time and the outside air temperature that has been acquired by the acquisition unit 302 from the second management data MD2 of the specified record R. Next, the update unit 303 refers to the received operation data RD. When the air conditioner type indicates "cooling" and the set temperature after the change is lower than the set temperature before the change, the update unit 303 increments the number of changes corresponding to the set temperature before the change recorded in the received operation data RD among the number of changes recorded in the specified collection data AD. Further, the update unit 303 refers to the received operation data RD. When the air conditioner type indicates "heating" and the set temperature after the change is higher than the set temperature before the change, the update unit 303 increments the number of changes corresponding to the set temperature before the change recorded in the received operation data RD among the number of changes recorded in the specified collection data AD. Furthermore, the update unit 303 also updates the change probability corresponding to the incremented number of changes to the change probability reflecting the incremented number of changes. Here, referring to FIG. 6, the update of the number of changes will be described. FIG. 6 is a diagram for explaining the update of the number of changes. In the description of FIG. 6, it is an example where the current time is the 14:00 time period when updating the number of changes, and the outside air temperature acquired by the acquisition unit 302 is 34°C. Further, in the description of FIG. 6, it is an example where the air conditioner 1 is operating in the cooling mode. In the case of FIG. 6, the update unit 303 specifies the collection data AD corresponding to the combination of the time period of the 14:00 time period and the outside air temperature of 34°C from the first management data MD1 recorded in the record R to be processed. In the description of FIG. 6, it is an example where the set temperature before the change recorded in the received operation data RD is 25°C. Further, in the description of FIG. 6, it is an example where the set temperature after the change recorded in the received operation data RD is 24°C. In this example, the update unit 303 increments the number of changes corresponding to 25°C from "3" to "4" among the number of changes recorded in the specified collection data AD. Also, in the case of FIG. 6, the update unit 303 updates the change probability corresponding to 25°C from "3 / 4" to "4 / 4" along with the update of the number of changes. Referring back to the description of FIG. 2, the determination unit 304 determines the set temperature to be set for the air conditioner 1. The details of the determination method of the determination unit 304 will be described later. The setting unit 305 sets the set temperature determined by the determination unit 304 for the air conditioner 1. The setting unit 305 sets the set temperature for the air conditioner 1 based on the record R of the processing target. Specifically, the setting unit 305 generates setting data SD, and outputs the generated setting data SD and the communication information recorded in the record R of the processing target to the communication control unit 301. The set temperature determined by the determination unit 304 is recorded in the generated setting data SD. The communication control unit 301 sends the setting data SD received from the setting unit 305 to the air conditioner 1 based on the communication information received from the setting unit 305. [1-2. Operations] Next, the operations of each part of the air conditioning system 1000 according to Embodiment 1 will be described. FIG. 7 is a flowchart showing the operations of the management server 3. The flowchart of FIG. 7 starts at K minutes past each hour. Here, K is an integer from 0 to 59, for example, 0. Also, the flowchart of FIG. 7 is performed for each air conditioner 1. That is, the flowchart of FIG. 7 is an operation performed for each record R stored in the management DB 312. The acquisition unit 302 acquires the outside air temperature based on the record R of the processing target (step SA1). Step SA1 will be described in detail. The acquisition unit 302 generates forecast value request information based on the record R of the processing target, and outputs the generated forecast value request information to the communication control unit 301. For example, when the current time is 10:00, the time period from 10:00 to 11:00 is recorded in the forecast value request information. After receiving the forecast value request information from the acquisition unit 302, the communication control unit 301 sends the received forecast value request information to the meteorological server 4. Then, the communication control unit 301 receives a plurality of forecast values (for example, the forecast value at 10:00 and the forecast value at 11:00) corresponding to the location of the facility H and the time period recorded in the sent forecast value request information from the meteorological server 4. The acquisition unit 302 calculates the average of the forecast values received by the communication control unit 301, and acquires the calculated average value as the outside air temperature. Next, the determination unit 304 specifies the collected data AD of the processing target from the management data MD recorded in the record R of the processing target (step SA2). This will be described in detail with respect to step SA2. When the air conditioner type of the record R2 of the processing target indicates cooling, the determination unit 304 specifies the collection data AD corresponding to the combination of the time period including the current time and the outside air temperature obtained in step SA1 from the first management data MD1 recorded in the record R of the processing target. Further, when the air conditioner type of the record R2 of the processing target indicates heating, the determination unit 304 specifies the collection data AD corresponding to the combination of the time period including the current time and the outside air temperature obtained in step SA1 from the second management data MD2 recorded in the record R of the processing target. Next, the determination unit 304 performs a determination process (step SA3). The determination process is a process for determining the set temperature to be set in the air conditioner 1. In the determination process, the collection data AD specified in step SA2 is the processing target. FIG. 8 is a flowchart showing the operation of the determination unit 304 in the determination process. The operation shown in FIG. 8 is an operation performed when the air conditioner type of the record R of the processing target indicates cooling. The determination unit 304 determines whether the set temperature within the predetermined range shown in the collection data AD of the processing target satisfies the next first condition (step SA31). First condition: There are a first set temperature and a second set temperature. The first set temperature is a set temperature for which the corresponding change probability is equal to or higher than a predetermined threshold value. Further, as an example of the predetermined threshold value, 0.1 (10% in percentage) can be cited. The second set temperature is the second lowest value of the first set temperature within the predetermined range and is a set temperature for which the corresponding change probability is less than the predetermined threshold value. Here, referring to FIG. 3, the first set temperature and the second set temperature will be described. For the collection data AD shown in FIG. 3, the change probability of "0 / 3" is recorded for the set temperature of 23°C, the change probability of "0 / 1" is recorded for the set temperature of 24°C, the change probability of "3 / 4" is recorded for the set temperature of 25°C, the change probability of "2 / 3" is recorded for the set temperature of 26°C, and the change probability of "4 / 4" is recorded for the set temperature of 27°C. When the predetermined threshold value is 0.1, in the collection data AD shown in FIG. 3, 25°C, 26°C, and 27°C meet the first set temperature, and 24°C meets the second set temperature. Further, with respect to the collection data AD shown in FIG. 3, the above first condition is satisfied. Returning to the description of the flowchart shown in FIG. 8, when the determination unit 304 determines that the first condition is satisfied (step SA31: Yes), it determines whether there are a plurality of second set temperatures among the set temperatures recorded in the collection data AD of the processing target (step SA32). When the determination unit 304 determines that there are no multiple second set temperatures (step SA32: No), it determines the second set temperature as the set temperature to be set in the air conditioner 1 (step SA33). Here, referring to FIG. 3, step SA33 will be specifically described. When the predetermined threshold is 0.1, in the collected data AD shown in FIG. 3, 24°C is the second set temperature, and the other set temperatures do not conform to the second set temperature. Accordingly, when the predetermined threshold is 0.1 and the collected data AD to be processed is the collected data AD shown in FIG. 3, the determination unit 304 determines 24°C as the set temperature to be set in the air conditioner 1 in step 33. On the other hand, when the determination unit 304 determines that there are multiple second set temperatures (step SA33: Yes), it determines the second set temperature with the highest comfort level in the air-conditioned space S among the set temperatures recorded in the collected data AD to be processed as the set temperature to be set in the air conditioner 1 (step SA34). Among the set temperatures recorded in the collected data AD, the set temperature with the highest comfort level in the air-conditioned space S, when the air conditioning being executed in the air conditioner 1 is cooling, refers to the lowest set temperature recorded in the collected data AD. Here, step SA34 will be specifically described with reference to FIG. 9. FIG. 9 is a diagram showing an example of the collected data AD. For the set temperature of 23°C in the collected data AD shown in FIG. 9, the change probability of "0 / 3" is recorded, for the set temperature of 24°C, the change probability of "1 / 4" is recorded, for the set temperature of 25°C, the change probability of "0 / 2" is recorded, for the set temperature of 26°C, the change probability of "2 / 3" is recorded, and for the set temperature of 27°C, the change probability of "4 / 4" is recorded. When the predetermined threshold is 0.1, in the collected data AD shown in FIG. 9, 24°C, 26°C, and 27°C conform to the first set temperature, and 23°C and 25°C conform to the second set temperature. Accordingly, when the predetermined threshold is 0.1 and the collected data AD to be processed is the collected data AD shown in FIG. 9, when the air conditioning being executed in the air conditioner 1 is cooling, the determination unit 304 determines the second set temperature of 23°C as the set temperature to be set in the air conditioner 1. Returning to the description of step SA31, when the determination unit 304 determines that the first condition is not satisfied (step SA31: No), it determines that all the set temperatures recorded in the collected data AD to be processed are the first set temperature or the third set temperature (step SA35). The third set temperature refers to the set temperature whose corresponding change probability is less than the predetermined threshold. When the determination unit 304 determines that all the set temperatures recorded in the collected data AD of the processing target are the first set temperature (step SA35: first set temperature), it determines the set temperature at which the comfort of the air-conditioned space S becomes the highest among the set temperatures recorded in the collected data AD of the processing target as the set temperature to be set in the air conditioner 1 (step SA36). Returning to the description of step SA35, when the determination unit 304 determines that all the set temperatures recorded in the collected data AD of the processing target are the third set temperature (step SA35: third set temperature), it determines the set temperature at which the energy saving of the air conditioner 1 becomes the smallest among the set temperatures recorded in the collected data AD of the processing target as the set temperature to be set in the air conditioner 1 (step SA37). Among the set temperatures recorded in the collected data AD, the set temperature at which the energy consumption of the air conditioner 1 becomes the smallest, when the air conditioning being executed by the air conditioner 1 is cooling, is the highest set temperature among the set temperatures recorded in the collected data AD. Figure 10 is a flowchart showing the operation of the determination unit 304 in the determination process. The operation shown in Figure 10 is the operation performed when the air conditioning type in the record R of the processing target indicates heating. In the description of Figure 10, the same symbols are added to the steps that are the same as those in Figure 8, and the detailed description thereof is omitted. The determination unit 304 determines whether the set temperature within the predetermined range shown in the collected data AD included in the processing target satisfies the next second condition (step SA41). Second condition: There are a third set temperature and a fourth set temperature. The third set temperature refers to the set temperature at which the corresponding change probability is less than the predetermined threshold. The fourth set temperature refers to the second lowest value of the third set temperature within the predetermined range, and the corresponding change probability is equal to or greater than the predetermined threshold. Here, referring to Figure 4, the fourth set temperature will be described. In the collected data AD shown in Figure 4, the change probability of "4 / 4" is recorded for the set temperature of 18°C, the change probability of "2 / 3" is recorded for the set temperature of 19°C, the change probability of "1 / 4" is recorded for the set temperature of 20°C, the change probability of "0 / 2" is recorded for the set temperature of 21°C, the change probability of "0 / 3" is recorded for the set temperature of 22°C, and the change probability of "0 / 2" is recorded for the set temperature of 23°C. When the predetermined threshold is 0.1, in the collected data AD shown in Figure 4, 21°C, 22°C, and 23°C meet the third set temperature, and 20°C meets the fourth set temperature. Furthermore, regarding the collected data AD shown in Figure 4, the above second condition is satisfied. Returning to the description of the flowchart shown in FIG. 10, when the determination unit 304 determines that the second condition is satisfied (step SA41: Yes), it determines whether there are a plurality of third set temperatures among the set temperatures recorded in the collected data AD of the processing target (step SA42). When the determination unit 304 determines that there are not a plurality of third set temperatures (step SA32: No), it determines the third set temperature as the set temperature to be set in the air conditioner 1 (step SA43). On the other hand, when the determination unit 304 determines that there are a plurality of third set temperatures (step SA43: Yes), it determines the third set temperature with the highest comfort level of the air-conditioned space S among the set temperatures recorded in the collected data AD of the processing target as the set temperature to be set in the air conditioner 1 (step SA44). Among the set temperatures recorded in the collected data AD, the set temperature with the highest comfort level of the air-conditioned space S, when the air conditioning being executed in the air conditioner 1 is heating, refers to the highest set temperature among the set temperatures recorded in the collected data AD. Returning to the description of step SA41, when the determination unit 304 determines that the second condition is not satisfied (step SA41: No), it performs the processing after step SB35. Furthermore, among the set temperatures recorded in the collected data AD, the set temperature at which the energy consumption of the air conditioner 1 becomes the minimum, when the air conditioning being executed in the air conditioner 1 is heating, refers to the lowest set temperature among the set temperatures recorded in the collected data AD. Returning to the description of the flowchart in FIG. 7, the setting unit 305 sets the set temperature of the air conditioner 1 to the set temperature determined in the determination process of step SA3 (step SA4). [1-3. Effects, etc.] As described above, the air conditioning system 1000 air-conditions the air-conditioned space S by the air conditioner 1. The air conditioning system 1000 includes: a server memory 310 that stores the number of times the set temperature of the air conditioner 1 has been changed for each set temperature of the air conditioner 1; and a determination unit 304 that determines the set temperature to be set in the air conditioner 1 based on the number of times of change stored in the server memory 310. Accordingly, by determining the set temperature to be set in the air conditioner 1 based on the number of times the set temperature of the air conditioner 1 has been changed, it becomes possible to set the set temperature of the air conditioner 1 to a temperature with a lower possibility of making the user feel uncomfortable. Therefore, the number of times the user changes the set temperature of the air conditioner 1 can be reduced. Accordingly, an increase in the energy consumption of the air conditioner 1 caused by the change of the set temperature can be suppressed. The air conditioning system 1000 includes an acquisition unit 302 that acquires the external air temperature. The server memory 310 stores the number of changes in each set temperature of the air conditioner 1 for the combination of time periods and external air temperatures. The determination unit 304 determines the set temperature to be set for the air conditioner 1 based on the number of changes corresponding to the combination of the time period including the current time and the external air temperature acquired by the acquisition unit 302 among the number of changes stored in the server memory 310. Generally, the comfort level of the air-conditioned space S required by the user varies according to the time period and the external air temperature. Therefore, the set temperature to be set for the air conditioner 1 is determined based on the number of changes corresponding to the time period and the external air temperature. As a result, it becomes possible to set the set temperature of the air conditioner 1 to a temperature with a lower probability of making the user uncomfortable according to the time period and the external air temperature, and the number of times the user changes the set temperature of the air conditioner 1 can be further reduced. Accordingly, the increase in the energy consumption of the air conditioner 1 caused by the change in the set temperature can be further suppressed. The acquisition unit 302 acquires a forecast value of the external air temperature for the time period including the current time from a service that provides weather data, and acquires the external air temperature based on the acquired forecast value. Accordingly, the set temperature to be set for the air conditioner 1 can be determined based on the number of changes corresponding to the correct external air temperature. Therefore, the number of times the user changes the set temperature of the air conditioner 1 can be further reduced. Accordingly, the increase in the energy consumption of the air conditioner 1 caused by the change in the set temperature can be further suppressed. The server memory 310 stores the actual recording number, the number of changes, and the change probability for each set temperature within a predetermined range of the set temperature included in the air conditioner 1. The actual recording number is the number of times the set temperature has been set for the air conditioner 1. The change probability is a probability calculated from the actual recording number and the number of changes, and is the probability that the set temperature has been changed. When the air conditioner 1 is operating in the cooling mode, if the first condition that there are a first set temperature and a second set temperature is satisfied for the set temperature within the predetermined range, the determination unit 304 determines the second set temperature as the set temperature to be set for the air conditioner 1. The first set temperature is a temperature at which the change probability is equal to or higher than a predetermined threshold value. The second set temperature is the second lowest value of the first set temperature within the predetermined range and a temperature at which the change probability is less than the predetermined threshold value. Accordingly, when there are a first set temperature and a second set temperature within a set temperature included in a predetermined range, the set temperature to be set for the air conditioner 1 can be determined as the set temperature with a lower change probability and the temperature that is the second lowest value among the set temperatures with a higher change probability. Therefore, during cooling, the set temperature to be set for the air conditioner 1 can be determined as an appropriate set temperature with a lower possibility of making the user feel uncomfortable. Accordingly, during cooling, an increase in the energy consumption of the air conditioner 1 caused by a change in the set temperature can be suppressed. When the set temperature included in the predetermined range satisfies the first condition and there are a plurality of second set temperatures among the set temperatures included in the predetermined range, the determination unit 304 determines the second set temperature with the highest comfort level of the air-conditioned space S as the set temperature to be set for the air conditioner 1. Accordingly, when there are a plurality of second set temperatures, since the second set temperature with a higher comfort level of the air-conditioned space S is determined, the set temperature to be set for the air conditioner 1 can be determined as a more appropriate set temperature. Accordingly, during cooling, an increase in the energy consumption of the air conditioner 1 caused by a change in the set temperature can be further suppressed. When the air conditioner 1 is in the heating operation state, if the set temperature included in the predetermined range satisfies the second condition that there are a third set temperature and a fourth set temperature, the determination unit 304 determines the third set temperature as the set temperature to be set for the air conditioner 1, where the third set temperature is a temperature with a change probability less than a predetermined threshold value, and the fourth set temperature is a temperature that is the second lowest value of the third set temperature in the predetermined range and has a change probability of the predetermined threshold value or more. Accordingly, when there are a third set temperature and a fourth set temperature within a set temperature included in a predetermined range, the set temperature to be set for the air conditioner 1 can be determined as the set temperature with a lower change probability and the temperature that is the second highest value among the set temperatures with a higher change probability. Therefore, during heating, the set temperature to be set for the air conditioner 1 can be determined as an appropriate set temperature with a lower possibility of making the user feel uncomfortable. Accordingly, during heating, an increase in the energy consumption of the air conditioner 1 caused by a change in the set temperature can be suppressed. When the set temperature included in the predetermined range satisfies the second condition and there are a plurality of third set temperatures among the set temperatures included in the predetermined range, the determination unit 304 determines the third set temperature with the highest comfort level of the air-conditioned space S as the set temperature to be set for the air conditioner 1. Accordingly, in the case where there are a plurality of third set temperatures, since the third set temperature that makes the comfort of the air-conditioned space S higher is determined, the set temperature to be set in the air conditioner 1 can be determined as a more appropriate set temperature. Accordingly, during heating, an increase in the energy consumption of the air conditioner 1 caused by a change in the set temperature can be further suppressed. When all the set temperatures included in the predetermined range conform to the first set temperature, the determination unit 304 determines, as the set temperature to be set in the air conditioner 1, the set temperature with the highest comfort of the air-conditioned space S among the predetermined range. Accordingly, in the case where an appropriate set temperature cannot be determined from the set temperatures included in the predetermined range and the change probability of any set temperature is high, the set temperature to be set in the air conditioner 1 can be determined as a set temperature that can suppress an increase in the number of changes in the set temperature. Accordingly, even in the case where an appropriate set temperature cannot be determined due to multiple changes in the set temperature, an increase in the energy consumption of the air conditioner 1 caused by the change in the set temperature can still be suppressed. When all the set temperatures included in the predetermined range all conform to the third set temperature with a change probability less than the predetermined threshold, the determination unit 304 determines, as the set temperature to be set in the air conditioner 1, the set temperature at which the energy consumption of the air conditioner 1 becomes the minimum among the predetermined range. Accordingly, in the case where an appropriate set temperature cannot be determined from the set temperatures included in the predetermined range and the change probability of any set temperature is low, the set temperature to be set in the air conditioner 1 is determined as a set temperature that makes the energy consumption of the air conditioner 1 smaller. Accordingly, even in the case where an appropriate set temperature cannot be determined due to infrequent changes in the set temperature, an increase in the energy consumption of the air conditioner 1 caused by the change in the set temperature can still be suppressed. The control method of the air conditioning system 1000 memorizes the number of times the set temperature of the air conditioner 1 has been changed for each set temperature of the air conditioner 1, and determines the set temperature to be set in the air conditioner 1 based on the memorized number of changes. Accordingly, the same effect as that of the above-described air conditioning system 1000 can be exhibited. The control program 311 causes the server control device 30 of the air conditioning system 1000 to function as the determination unit 304. The determination unit 304 determines the set temperature to be set in the air conditioner 1 based on the number of changes memorized in the server memory 310 that memorizes the number of times the set temperature of the air conditioner 1 has been changed for each set temperature of the air conditioner 1. Accordingly, the same effect as that of the above-described air conditioning system 1000 can be exhibited. (Embodiment 2) Next, Embodiment 2 will be described. [2-1. Configuration] The configuration of each part of the air conditioning system 1000 in Embodiment 2 is the same as that of each part of the air conditioning system 1000 in Embodiment 1, and detailed description thereof will be appropriately omitted. [2-2. Operation] Next, the operation of each part of the air conditioning system 1000 in Embodiment 2 will be described. Compared with Embodiment 1, in Embodiment 2, the operation of the management server 3 related to the setting of the set temperature of the air conditioning device 1 is different. Furthermore, in this embodiment, the operation related to the setting of the set temperature is also performed for each air conditioning device 1. That is, in this embodiment as well, the operation related to the setting of the set temperature is performed for each record R stored in the management DB 312. First, the operation in the case where the air conditioning type of the record R to be processed is cooling will be described. FIG. 11 is a flowchart showing the operation of the management server 3 in Embodiment 2. In the description of FIG. 11, the same symbols are added to the steps that are the same as the steps in FIG. 7, and detailed description thereof will be appropriately omitted. The flowchart of FIG. 11 starts at P minutes per hour. Here, P is an integer from 0 to 59, for example, 0. As shown in the flowchart of FIG. 11, the determination unit 304 determines whether the set temperature included in the predetermined range shown in the collected data AD specified in step SA2 satisfies the above-mentioned first condition (step SB1). When the determination unit 304 determines that the first condition is satisfied (step SB1: Yes), it performs a determination process (step SB2). Step SB2 is a process of determining the set temperature to be set in the air conditioning device 1, and only the steps SA32, SA34, and SA35 of the determination process performed only in Embodiment 1 are performed. In the determination process of step SB2, the collected data AD specified in step SA2 is set as the processing target. Returning to the description of step SB1, when the determination unit 304 determines that the first condition is not satisfied (step SB1: No), it performs a process for making the first condition hold (step SB3). The process for making the first condition hold is a process for making the set temperature recorded in the collected data AD satisfy the above-mentioned first condition. In the process for making the first condition hold, the collected data AD specified in step SA2 is set as the processing target. FIG. 12 is a flowchart showing the operation of the determination unit 304 in the process for making the first condition hold. The determination unit 304 determines whether all the actual record numbers recorded in the collected data AD that is the processing target are zero (step SB31). When the determination unit 304 determines that the actual recorded number is all zero (step SB31: Yes), it determines the median of the plurality of set temperatures of the collected data AD to be processed as the set temperature to be set for the air conditioner 1 (step SB32). Further, in the present embodiment, when calculating the median of the set temperatures, the decimal part can be unconditionally discarded or rounded off. Furthermore, the set temperature determined in step SB32 is not limited to the median. For example, the set temperature determined in step SB32 can also be set to the lowest set temperature among the plurality of set temperatures of the collected data AD to be processed, or can also be set to the highest set temperature, or can also be set to the set temperature that is second higher than the median, or can also be set to the set temperature that is second lower than the median. Returning to the description of step SB31, when the determination unit 304 determines that the actual recorded number is not all zero (step SB31: No), it determines whether the change probability of the fifth set temperature (hereinafter referred to as the "fifth set temperature") at which the energy consumption becomes the smallest among the set temperatures where the actual recorded number is 1 or more (hereinafter referred to as the "energy-saving side fifth set temperature") is less than a predetermined threshold value (step SB33). This predetermined threshold value can be, for example, 0.1 (10% in percentage). Here, referring to FIG. 13, the energy-saving side fifth set temperature will be described. FIG. 13 is a diagram showing an example of the collected data AD. In the collected data AD shown in FIG. 13, for each set temperature from 23°C to 24°C, the actual recorded number of "4", the number of changes of "0", and the change probability of "0 / 4" are recorded. Also, in the collected data AD shown in FIG. 13, for each set temperature from 25°C to 27°C, the actual recorded number of "0" and the number of changes of "0" are recorded. On the other hand, since the actual recorded number is zero, the change probability is not recorded. When the air conditioner type in the record R to be processed is a cooler, in the collected data AD shown in FIG. 13, 24°C corresponds to the energy-saving side fifth set temperature. Returning to the description of the flowchart in FIG. 12, when the determination unit 304 determines that the change probability of the energy-saving side fifth set temperature is less than the predetermined threshold value (step SB33: Yes), it determines whether the added temperature obtained by adding 1°C to the energy-saving side fifth set temperature is higher than the highest set temperature among the set temperatures of the collected data AD to be processed (step SB34). The added temperature is an example corresponding to the "first calculated temperature". Here, FIG. 13 is referred to for a specific description of the process of step SB34. As described above, in FIG. 13, when the air conditioner 1 is operating in the cooling mode, 24°C is the fifth set temperature on the energy-saving side. Therefore, in the case of FIG. 13, the added temperature when the air conditioner 1 is operating in the cooling mode is 25°C. Also, among the set temperatures recorded in the collected data AD shown in FIG. 13, 27°C is the highest set temperature. Accordingly, in the case of FIG. 13, the determination unit 304 makes a negative determination in step SB34. When the determination unit 304 determines that the added temperature does not exceed the highest set temperature among the set temperatures recorded in the collected data AD of the processing target (step SB34: No), the added temperature is determined as the set temperature to be set in the air conditioner 1 (step SB35). On the other hand, when the determination unit 304 determines that the added temperature exceeds the highest set temperature among the set temperatures recorded in the collected data AD of the processing target (step SB34: Yes), the set temperature with the smallest actual record count in the collected data AD of the processing target is determined as the set temperature to be set in the air conditioner 1 (step SB36). Furthermore, when there are multiple set temperatures with the smallest actual record count, the determination unit 304 determines the set temperature that minimizes the energy consumption of the air conditioner 1 among the set temperatures with the smallest actual record count as the set temperature to be set in the air conditioner 1. Here, FIG. 14 is referred to for an explanation of step SB36. FIG. 14 is a diagram showing an example of the collected data AD. In the collected data AD shown in FIG. 14, for each set temperature from 23°C to 26°C, an actual record count of "0" and a change count of "0" are recorded. On the other hand, since the actual record count is zero, the change probability is not recorded. Also, in the collected data AD shown in FIG. 14, for the set temperature of 27°C, an actual record count of "3", a change count of "4", and a change probability of "3 / 4" are recorded. In FIG. 14, 27°C is the fifth set temperature on the energy-saving side. Accordingly, the added temperature becomes 28°C, which is higher than the highest set temperature among the set temperatures recorded in the collected data AD. Therefore, in the case of FIG. 14, when the air conditioner 1 is operating in the cooling mode, the determination unit 304 determines 26°C as the set temperature to be set in the air conditioner 1. Referring back to the description of step SB33 in FIG. 12, when the determination unit 304 determines that the change probability of the fifth set temperature on the energy-saving side is not less than the predetermined threshold (step SB33: No), it determines whether there is a sixth set temperature with an actual record count of zero between the lowest set temperature and the fifth set temperature on the energy-saving side within the predetermined range of the set temperature shown in the collected data AD of the processing target (step SB37). When the determination unit 304 determines that there is a sixth set temperature between the lowest set temperature and the fifth set temperature on the energy-saving side (step SB37: Yes), it determines the sixth set temperature as the set temperature to be set in the air conditioner 1 (step SB38). Further, when there are multiple sixth set temperatures, the determination unit 304 determines the sixth set temperature that minimizes the energy saving of the air conditioner 1 as the set temperature to be set in the air conditioner 1. Here, step SB38 will be described with reference to FIG. 15. FIG. 15 is a diagram showing an example of the collected data AD. In the collected data AD shown in FIG. 15, for each of the set temperatures of 23°C, 24°C, and 27°C, the actual record count of "0" and the change count of "0" are recorded. On the other hand, since the actual record count is zero, the change probability is not recorded. Also, in the collected data AD shown in FIG. 15, for the set temperature of 25°C, the actual record count of "3", the change count of "2", and the change probability of "2 / 3" are recorded. Also, in the collected data AD shown in FIG. 15, for the set temperature of 26°C, the actual record count of "4", the change count of "4", and the change probability of "4 / 4" are recorded. When the predetermined threshold is 0.1 and the air conditioner type recorded in the record R of the processing target is a cooler, in the collected data AD shown in FIG. 15, 26°C corresponds to the fifth set temperature on the energy-saving side. In the collected data AD of FIG. 15, 23°C is the lowest set temperature. That is, in the collected data AD of FIG. 15, there is a sixth set temperature of 23°C and a sixth set temperature of 24°C between 26°C and the fifth set temperature on the energy-saving side. Accordingly, in the case of FIG. 15, in step SB38, when the air conditioner 1 is operating as a cooler, the determination unit 304 sets 24°C as the set temperature to be set in the air conditioner 1. Returning to the description of the flowchart in FIG. 12, when the determination unit 304 determines that there is no sixth set temperature between the lowest set temperature and the fifth set temperature on the energy-saving side (step SB37: No), it will determine the set temperature with the smallest actual recorded number between the lowest set temperature and the fifth set temperature on the energy-saving side within the predetermined range shown in the collected data AD as the set temperature to be set in the air conditioner 1 (step SB39). Furthermore, when there are multiple set temperatures with the smallest actual recorded number, the determination unit 304 will determine the set temperature with the smallest energy consumption of the air conditioner 1 among the set temperatures with the smallest actual recorded number as the set temperature to be set in the air conditioner 1. Returning to the description of the flowchart in FIG. 11, the setting unit 305 sets the set temperature of the air conditioner 1 to the set temperature determined in step SB2 or step SB3 (step SB4). Next, the operation in the case where the air-conditioning type of the record R to be processed is heating will be described. FIG. 16 is a flowchart showing the operation of the management server 3 in the second embodiment. In the description of FIG. 16, the same symbols are added to the steps that are the same as those in FIG. 7, and their detailed descriptions are appropriately omitted. The flowchart in FIG. 16 is a flowchart that starts at P minutes per hour. As shown in the flowchart of FIG. 16, the determination unit 304 determines whether the set temperature included in the predetermined range shown in the collected data AD specified in step SA2 satisfies the above-mentioned second condition (step SC1). When the determination unit 304 determines that the second condition is satisfied (step SC1: Yes), it performs a determination process (step SC2). Step SC2 is a process of determining the set temperature to be set in the air conditioner 1, and only the steps SA42, SA44, and SA45 of the determination process performed only in the first embodiment are performed. In the determination process of step SC2, the collected data AD specified in step SA2 is set as the processing target. Returning to the description of step SC1, when the determination unit 304 determines that the second condition is not satisfied (step SC1: No), it performs a process for making the second condition hold (step SC3). The process for making the second condition hold refers to a process for making the set temperature recorded in the collected data AD satisfy the above-mentioned second condition. In the process for making the second condition hold, the collected data AD specified in step SA2 is set as the processing target. FIG. 17 is a flowchart showing the operation of the determination unit 304 in the process for making the second condition hold. In the description of FIG. 17, the same symbols are added to the steps that are the same as those in FIG. 12, and their detailed descriptions are appropriately omitted. When the determination unit 304 determines that the change probability of the fifth set temperature on the energy-saving side is less than the predetermined threshold (step SB33: Yes), it determines whether the subtracted temperature obtained by reducing the fifth set temperature on the energy-saving side by 1°C is lower than the lowest set temperature among the set temperatures recorded in the collected data AD of the processing target (step SC31). The subtracted temperature is an example corresponding to the "second calculated temperature". Here, referring to FIG. 18, the fifth set temperature on the energy-saving side during heating will be described. FIG. 18 is a diagram showing an example of the collected data AD. In the collected data AD shown in FIG. 18, for each set temperature from 19°C to 20°C, the actual record number of "2", the change number of "1", and the change probability of "1 / 2" are recorded. Also, in the collected data AD shown in FIG. 18, for each set temperature of 18°C and from 21°C to 23°C, the actual record number of "0" and the change number of "0" are recorded. On the other hand, since the actual record number is zero, the change probability is not recorded. When the type of air conditioner recorded in the record R of the processing target is heating, in the collected data AD shown in FIG. 18, 19°C corresponds to the fifth set temperature on the energy-saving side. Here, FIG. 18 is used to specifically explain the process of step SC31. As described above, in FIG. 18, 19°C is the fifth set temperature on the energy-saving side. Therefore, in the case of FIG. 18, the subtracted temperature is 18°C. Also, among the set temperatures recorded in the collected data AD of FIG. 18, 18°C is the lowest set temperature. Accordingly, in the case of FIG. 18, the determination unit 304 makes a negative determination in step SC41. When the determination unit 304 determines that the subtracted temperature is not lower than the lowest set temperature among the set temperatures recorded in the collected data AD of the processing target (step SC41: No), it determines the subtracted temperature as the set temperature to be set in the air conditioner 1 (step SC42). Returning to the description of step SB33 in FIG. 17, when the determination unit 304 determines that the change probability of the fifth set temperature on the energy-saving side is not less than the predetermined threshold (step SB33: No), it determines whether there is a sixth set temperature with an actual record number of zero between the highest set temperature and the fifth set temperature on the energy-saving side within the predetermined range of the set temperatures shown in the collected data AD of the processing target (step SC33). When the determination unit 304 determines that there is a sixth set temperature between the highest set temperature and the fifth set temperature on the energy-saving side (step SC33: Yes), it determines the sixth set temperature as the set temperature to be set for the air conditioner 1 (step SB38). Further, when there are a plurality of sixth set temperatures, the determination unit 304 determines the sixth set temperature that minimizes the energy consumption of the air conditioner 1 as the set temperature to be set for the air conditioner 1. When the determination unit 304 determines that there is no sixth set temperature between the highest set temperature and the fifth set temperature on the energy-saving side (step SC33: No), it determines the set temperature with the minimum actual record number between the highest set temperature and the fifth set temperature on the energy-saving side within the predetermined range shown in the collected data AD as the set temperature to be set for the air conditioner 1 (step SC34). Further, when there are a plurality of set temperatures with the minimum actual record number, the determination unit 304 determines the set temperature that minimizes the energy consumption of the air conditioner 1 among the set temperatures with the minimum actual record number as the set temperature to be set for the air conditioner 1. Returning to the description of the flowchart in FIG. 16, the setting unit 305 sets the set temperature of the air conditioner 1 to the set temperature determined in step SC2 or step SC3 (step SC4). [2-3. Effects, etc.] As described above, when the set temperature included in the predetermined range shown in the collected data AD does not satisfy the first condition, the determination unit 304 performs the process for making the first condition hold, and the process for making the first condition hold is a process for making the set temperature included in the predetermined range shown in the collected data AD satisfy the first condition. Accordingly, when it is impossible to determine an appropriate set temperature from the predetermined range of the set temperatures shown in the collected data AD, the process for making the first condition hold can be executed. Therefore, it is possible to reduce the occurrence of a situation where an appropriate set temperature cannot be determined from the predetermined range of the set temperatures shown in the collected data AD during cooling, and it is possible to suppress an increase in the energy consumption of the air conditioner 1. The predetermined range includes a plurality of set temperatures with an interval of 1°C. In the process for making the first condition hold when there is a fifth set temperature with an actual record number of 1 or more among the set temperatures included in the predetermined range, when the change probability of the fifth set temperature on the energy-saving side is less than the predetermined threshold value and the added temperature obtained by adding 1°C to the fifth set temperature on the energy-saving side does not exceed the highest set temperature within the predetermined range, the added temperature is determined as the set temperature to be set for the air conditioner 1. Accordingly, in the process for the case where the first condition is satisfied, the set temperature to be set for the air conditioner 1 is determined as the set temperature with an actual record number of zero and a set temperature at which the comfort level of the air-conditioned space S becomes relatively low. Therefore, the possibility of changing from the set temperature with an actual record number of zero to other set temperatures can be increased. Accordingly, the occurrence of a situation where it is impossible to determine an appropriate set temperature from the predetermined range of set temperatures shown in the collected data AD during cooling can be further reduced, and an increase in the energy consumption of the air conditioner 1 can be effectively suppressed. When the change probability of the fifth set temperature on the energy-saving side is less than the predetermined threshold value and the added temperature is higher than the highest set temperature within the predetermined range, the determination unit 304 determines the set temperature with the minimum actual record number within the predetermined range as the set temperature to be set for the air conditioner 1. Accordingly, in the process for the case where the first condition is satisfied, the set temperature to be set for the air conditioner 1 is determined as the set temperature with the minimum actual record number. Therefore, the possibility of changing from the set temperature with the minimum actual record number to other set temperatures can be increased. Accordingly, the occurrence of a situation where it is impossible to determine an appropriate set temperature from the predetermined range of set temperatures shown in the collected data AD during cooling can be further reduced, and an increase in the energy consumption of the air conditioner 1 can be effectively suppressed. In the process for the case where the first condition is satisfied when there is a fifth set temperature with an actual record number of 1 or more among the set temperatures included in the predetermined range, when the change probability of the fifth set temperature on the energy-saving side is equal to or higher than the predetermined threshold value and there is a sixth set temperature with an actual record number of zero between the lowest set temperature and the fifth set temperature on the energy-saving side within the predetermined range, the determination unit 304 determines the sixth set temperature as the set temperature to be set for the aforementioned air conditioner. Accordingly, in the process for the case where the first condition is satisfied, the set temperature to be set for the air conditioner 1 is determined as the sixth set temperature with an actual record number of zero and lower than the fifth set temperature on the energy-saving side. Therefore, the possibility that the actual record number of the set temperature lower than the fifth set temperature on the energy-saving side becomes 1 or more can be increased. Accordingly, during cooling, the possibility of satisfying the first condition within the predetermined range of set temperatures shown in the collected data AD can be increased, and an increase in the energy consumption of the air conditioner 1 can be effectively suppressed. When the change probability of the fifth set temperature on the energy-saving side is equal to or higher than the predetermined threshold value and there is no sixth set temperature between the lowest set temperature and the fifth set temperature on the energy-saving side within the predetermined range, the determination unit 304 determines the set temperature with the minimum actual record number between the lowest set temperature and the fifth set temperature on the energy-saving side within the predetermined range as the set temperature to be set for the air conditioner 1. Accordingly, in the process for the satisfaction of the first condition, the set temperature to be set for the air conditioner 1 is determined to be a set temperature lower than the fifth energy-saving side set temperature and having the lowest actual recorded number. Therefore, the possibility of increasing the actual recorded number of set temperatures lower than the fifth energy-saving side set temperature can be increased. Based on this, the possibility of satisfying the first condition within the predetermined range of the set temperature shown in the collected data AD can be increased, and an increase in the energy consumption of the air conditioner 1 can be effectively suppressed. When the set temperature included in the predetermined range shown in the collected data AD does not satisfy the second condition, the determination unit 304 executes the process for the satisfaction of the second condition, and the process for the satisfaction of the second condition is a process for enabling the set temperature included in the predetermined range shown in the collected data AD to satisfy the second condition. Accordingly, when an appropriate set temperature cannot be determined from the predetermined range of the set temperature shown in the collected data AD, the process for the satisfaction of the second condition is executed. Therefore, the occurrence of a situation where an appropriate set temperature cannot be determined from the predetermined range of the set temperature shown in the collected data AD during heating can be reduced, and an increase in the energy consumption of the air conditioner 1 can be suppressed. The predetermined range includes a plurality of set temperatures at intervals of 1°C. In the process for the satisfaction of the second condition when there is a fifth set temperature with an actual recorded number of 1 or more among the set temperatures included in the predetermined range, when the change probability of the fifth energy-saving side set temperature is less than the predetermined threshold value and the subtracted temperature obtained by subtracting 1°C from the fifth energy-saving side set temperature is not lower than the lowest set temperature within the predetermined range, the subtracted temperature is determined as the set temperature to be set for the air conditioner 1. Accordingly, in the process for the satisfaction of the second condition, the set temperature to be set for the air conditioner 1 is determined to be a set temperature with an actual recorded number of zero and a lower comfort level of the air-conditioned space S. Therefore, the possibility of changing from a set temperature with an actual recorded number of zero to other set temperatures can be increased. Based on this, the occurrence of a situation where an appropriate set temperature cannot be determined from the predetermined range of the set temperature shown in the collected data AD during heating can be further reduced, and an increase in the energy consumption of the air conditioner 1 can be effectively suppressed. When the change probability of the fifth energy-saving side set temperature is less than the predetermined threshold value and the subtracted temperature is lower than the lowest set temperature within the predetermined range, the determination unit 304 determines the set temperature with the smallest actual recorded number within the predetermined range as the set temperature to be set for the air conditioner 1. Accordingly, in the process for the establishment of the second condition, the set temperature to be set for the air conditioner 1 is determined as the set temperature with the fewest actual records. Therefore, the possibility of changing from the set temperature with the fewest actual records to other set temperatures can be increased. Thereby, the occurrence of a situation where it is impossible to determine an appropriate set temperature from the predetermined range of the set temperatures shown in the collected data AD during heating can be further reduced, and an increase in the energy consumption of the air conditioner 1 can be effectively suppressed. In the process for the establishment of the second condition when there is a fifth set temperature with one or more actual records among the set temperatures included in the predetermined range, if the change probability of the fifth set temperature on the energy-saving side is equal to or higher than a predetermined threshold value, and there is a sixth set temperature with zero actual records between the highest set temperature and the fifth set temperature on the energy-saving side within the predetermined range, the sixth set temperature is determined as the set temperature to be set for the air conditioner. Accordingly, in the process for the establishment of the second condition, the set temperature to be set for the air conditioner 1 is determined as the sixth set temperature with zero actual records and higher than the fifth set temperature on the energy-saving side. Therefore, the possibility that the actual record count of a set temperature higher than the fifth set temperature on the energy-saving side becomes one or more can be increased. Thereby, during heating, the possibility of satisfying the second condition for the predetermined range of the set temperatures shown in the collected data AD can be increased, and an increase in the energy consumption of the air conditioner 1 can be effectively suppressed. When the change probability of the fifth set temperature on the energy-saving side is equal to or higher than a predetermined threshold value and there is no sixth set temperature between the highest set temperature and the fifth set temperature on the energy-saving side within the predetermined range, the determination unit 304 determines the set temperature with the smallest actual record count between the highest set temperature and the fifth set temperature on the energy-saving side within the predetermined range as the set temperature to be set for the air conditioner 1. Accordingly, in the process for the establishment of the second condition, the set temperature to be set for the air conditioner 1 is determined as the set temperature higher than the fifth set temperature on the energy-saving side and with the lowest actual record count. Therefore, the possibility of increasing the actual record count of a set temperature higher than the fifth set temperature on the energy-saving side can be increased. Thereby, the possibility of satisfying the second condition for the predetermined range of the set temperatures shown in the collected data AD can be increased, and an increase in the energy consumption of the air conditioner 1 can be effectively suppressed. (Other Embodiments) As described above, as examples disclosed in the present application, the above-described Embodiments 1 and 2 have been described. However, the technology in the present disclosure is not limited thereto, and it can also be applied to embodiments with changes, replacements, additions, omissions, etc. Also, the respective constituent elements described in the above Embodiments 1 and 2 can be combined to form a new embodiment. Then, other embodiments are exemplified below. In the above-described Embodiments 1 and 2, the configuration includes the outside air temperature as a parameter for determining the set temperature to be set in the air conditioner 1. In other embodiments, the configuration may be as follows: as this parameter, instead of or together with the outside air temperature, it includes: the outside air humidity, or the amount of sunlight in a predetermined area including the location of the facility H, the amount of precipitation in a predetermined area including the location of the facility H, etc. In other embodiments, the management server 3 may further record the update date and time when actually recording the number of times or the number of changes. And, in other embodiments, the configuration may be as follows: the more recent the update date and time, the higher the priority for calculating the change probability. In the above-described embodiment, although the predetermined range shown in the collected data AD is in the range from 23°C to 27°C, this predetermined range is only an example, and it may also be the range of set temperatures that can be set by the air conditioner 1, or it may be envisioned as the range set by the user within the range of set temperatures that can be set by the air conditioner 1. In the above-described embodiment, the plurality of set temperatures included in the predetermined range shown in the collected data AD are set temperatures with an interval of 1°C. In other embodiments, the interval of the set temperatures included in the predetermined range is not limited to 1°C, and it may be made, for example, with an interval of 0.5°C. In other embodiments, the configuration may be as follows: the functions of at least any one of the acquisition unit 302, the update unit 303, the determination unit 304, and the setting unit 305 are not executed by the server control device 30, but by the control device for each part of the control terminal device 2, or the control device for each part of the air conditioner 1 (such as the communication device 14), etc. In the case of other embodiments, the control device for each part of the control terminal device 2, or the control device for each part of the air conditioner 1 corresponds to a "computer". Also, in the case of other embodiments, the program for realizing the functions of at least any one of the acquisition unit 302, the update unit 303, the determination unit 304, and the setting unit 305, and which is executed by the control device for each part of the control terminal device 2 or the control device for each part of the air conditioner 1, corresponds to a "program". Also, in the case of other embodiments, the memory of the terminal device 2 or the air conditioner 1 may store the management data MD. Furthermore, in the case where the control device for each part of the air conditioner 1 functions as the setting unit 305, the setting unit 305 sets the set temperature in the air conditioner 1 by controlling each part of the air conditioner 1. That is, in this case, the setting unit 305 does not generate the setting data SD. In the above-described embodiment, the first management data MD1 is configured to store the number of changes for the combination of time periods and the external air temperature. In other embodiments, the configuration may be as follows: the server memory 310 stores the number of changes for each set temperature for a time period, rather than for the combination of time periods and the external air temperature. In the case of other embodiments, the determination unit 304 determines the set temperature based on the number of changes corresponding to the time period. In the above-described embodiment, the first management data MD1 is configured to store the number of changes for the combination of time periods and the external air temperature. In other embodiments, the configuration may be as follows: the server memory 310 stores the number of changes for each set temperature for the external air temperature, rather than for the combination of time periods and the external air temperature. In the case of other embodiments, the determination unit 304 determines the set temperature based on the number of changes corresponding to the external air temperature. In the above-described embodiment, the set temperature is determined based on the number of changes that matches the time period including the current time and the external air temperature acquired by the acquisition unit 302. That is, in the above-described embodiment, the set temperature is determined based on the number of changes that matches the current conditions. In other embodiments, the set temperature may also be determined by considering the number of changes close to the current conditions (for example, the number of changes within ±1°C of the external air temperature acquired by the acquisition unit 302). In the above-described embodiment, when there are multiple second set temperatures and third set temperatures, the set temperature that maximizes the comfort of the air-conditioned space S is determined as the set temperature to be set. However, the set temperature that minimizes the energy consumption of the air conditioner 1 may also be determined as the set temperature to be set. In the above-described embodiment, the calculation rule for the "first calculated temperature" is the rule of adding 1°C. In other embodiments, the calculation rule for the "first calculated temperature" may also be the rule of adding a predetermined temperature (for example, 2°C), or the rule of multiplying by a predetermined coefficient (for example, 1.1). Furthermore, in the case of the multiplication rule, rounding up or rounding down may be performed unconditionally for the digits after the decimal point. Regarding this rule, the same applies to the "second calculated temperature", and it is not limited to the rule of subtracting 1°C. The server processor 300 can be constituted by a single processor or by a plurality of processors. These processors can also be hardware programmed to implement the corresponding functional units. That is, these processors can also be constituted by, for example, an ASIC (Application Specific Integrated Circuit) or an FPGA (Field Programmable Gate Array). Taking the constitution of the management server 3 shown in FIG. 2 as an example, the specific assembly form is not particularly limited. That is, it is not necessarily required to assemble the corresponding hardware individually for each part, and it can also be configured to implement the functions of each part by executing a program with one processor. Also, a part of the functions implemented by software in the above-described embodiment can be set as hardware, or a part of the functions implemented by hardware can be implemented by software. The step units of the operations shown in FIGS. 7, 8, 10, 11, 12, 16, and 17 are divided according to the main processing content for easy understanding of the operations, and the operations are not limited by the division method or name of the processing units. It can also be further divided into more step units according to the processing content. Also, it can be divided so that one step unit includes more processing. Also, the order of these steps can be appropriately replaced within the scope that does not hinder the gist of this disclosure. Furthermore, since the above-described embodiments are used to illustrate the embodiments of the technology in this disclosure, various changes, replacements, additions, omissions, etc. can be made in the scope of the claims or their equivalents. (Supplementary Note) Through the description of the above embodiments, the following technology is disclosed. (Technology 1) An air conditioning system that air conditions an air-conditioned space by means of an air conditioning device, the air conditioning system comprising: a memory unit that stores the number of times the set temperature of the air conditioning device has been changed for each set temperature of the air conditioning device; and a determination unit that determines the set temperature to be set for the air conditioning device based on the number of times the set temperature has been changed stored in the memory unit. Accordingly, by determining the set temperature to be set for the air conditioning device based on the number of times the set temperature of the air conditioning device has been changed, it becomes possible to set the set temperature of the air conditioning device to a temperature with a lower possibility of making the user feel uncomfortable. Therefore, the number of times the user changes the set temperature of the air conditioning device can be reduced. Accordingly, an increase in the energy consumption of the air conditioning device caused by the change of the set temperature can be suppressed. (Technology 2) The air conditioning system as described in Technology 1 includes an acquisition unit that acquires the external air temperature. The memory unit stores the number of times of change of each set temperature of the air conditioning device for each combination of time period and external air temperature. The determination unit determines the set temperature to be set for the air conditioning device based on the number of times of change corresponding to the combination of the time period including the current time and the external air temperature acquired by the acquisition unit among the number of times of change stored in the memory unit. Thereby, generally, the comfort of the air-conditioned space required by the user varies according to the time period and the external air temperature. Then, the set temperature to be set for the air conditioning device is determined based on the number of times of change corresponding to the time period and the external air temperature. Therefore, it becomes possible to set the set temperature of the air conditioning device to a temperature with a lower possibility of making the user feel uncomfortable according to the time period and the external air temperature, and the number of times the user changes the set temperature of the air conditioning device can be further reduced. Accordingly, the increase in the energy consumption of the air conditioning device caused by the change of the set temperature can be further suppressed. (Technology 3) In the air conditioning system as described in Technology 2, the acquisition unit acquires a forecast value of the external air temperature including the time period including the current time from a service that provides meteorological data, and acquires the external air temperature based on the acquired forecast value. Accordingly, the set temperature to be set for the air conditioning device can be determined based on the number of times of change corresponding to the correct external air temperature. Therefore, the number of times the user changes the set temperature of the air conditioning device can be further reduced. Accordingly, the increase in the energy consumption of the air conditioning device caused by the change of the set temperature can be further suppressed. (Technology 4) An air conditioning system as described in any one of Technologies 1 to 3, wherein the memory unit stores, for each set temperature within a predetermined range of the set temperature included in the air conditioner, the number of times the set temperature has been set in the air conditioner, i.e., the actual record number, the number of changes, and the change probability. The change probability is a probability calculated from the actual record number and the number of changes and is the probability that the set temperature has been changed. When the air conditioner is operating in the cooling mode, if a first condition that there is a first set temperature and a second set temperature is satisfied for the set temperature within the predetermined range, the determination unit determines the second set temperature as the set temperature to be set in the air conditioner. The first set temperature is a temperature at which the change probability is equal to or greater than a predetermined threshold value, and the second set temperature is a temperature that is the second lowest value among the first set temperature within the predetermined range and at which the change probability is less than the predetermined threshold value. Thereby, when there is a first set temperature and a second set temperature for the set temperature within the predetermined range, the set temperature to be set in the air conditioner can be determined as a set temperature with a lower change probability and a temperature that is the second lowest value among the set temperatures with a higher change probability. Therefore, during cooling, the set temperature to be set in the air conditioner can be determined as an appropriate set temperature with a lower possibility of making the user feel uncomfortable. Accordingly, during cooling, an increase in the energy consumption of the air conditioner caused by a change in the set temperature can be suppressed. (Technology 5) An air conditioning system as described in Technology 4, wherein when the set temperature within the predetermined range satisfies the first condition and there are a plurality of the second set temperatures among the set temperatures within the predetermined range, the determination unit determines the second set temperature with the highest comfort level of the air-conditioned space or the second set temperature at which the energy consumption of the air conditioner becomes the minimum as the set temperature to be set in the air conditioner. Accordingly, when there are a plurality of second set temperatures, since the second set temperature with a higher comfort level of the air-conditioned space or the second set temperature at which the energy consumption of the air conditioner becomes the minimum is determined, the set temperature to be set in the air conditioner can be determined as a more appropriate set temperature. Accordingly, during cooling, an increase in the energy consumption of the air conditioner caused by a change in the set temperature can be further suppressed. (Technology 6) An air conditioning system as described in any one of Technologies 1 to 3, wherein the memory unit stores, for each set temperature within a predetermined range of the set temperature included in the air conditioner, the number of times the set temperature has been set in the air conditioner, i.e., the actual record number, the number of changes, and the change probability. The change probability is a probability calculated from the actual record number and the number of changes and is the probability that the set temperature has been changed. When the air conditioner is operating in heating mode, if the set temperature within the predetermined range satisfies a second condition that there is a third set temperature and a fourth set temperature, the decision unit determines the third set temperature as the set temperature to be set in the air conditioner. The third set temperature is a temperature at which the change probability is less than a predetermined threshold value, and the fourth set temperature is the second lowest value of the third set temperature within the predetermined range and a temperature at which the change probability is equal to or greater than the predetermined threshold value. Accordingly, when there is a third set temperature and a fourth set temperature within the set temperature included in the predetermined range, the set temperature to be set in the air conditioner can be determined as a set temperature with a relatively low change probability and a temperature that is the second highest value of the set temperature with a relatively high change probability. Therefore, during heating, the set temperature to be set in the air conditioner can be determined as an appropriate set temperature with a relatively low possibility of making the user feel uncomfortable. Accordingly, during heating, an increase in the energy consumption of the air conditioner caused by a change in the set temperature can be suppressed. (Technology 7) An air conditioning system as described in Technology 6, wherein when the set temperature within the predetermined range satisfies the second condition and there are multiple third set temperatures within the set temperature included in the predetermined range, the decision unit determines the third set temperature with the highest comfort level of the air-conditioned space or the third set temperature at which the energy consumption of the air conditioner becomes the minimum as the set temperature to be set in the air conditioner. Accordingly, when there are multiple third set temperatures, since the third set temperature with a higher comfort level of the air-conditioned space or the third set temperature at which the energy consumption of the air conditioner becomes the minimum will be determined, the set temperature to be set in the air conditioner can be determined as a more appropriate set temperature. Accordingly, during heating, an increase in the energy consumption of the air conditioner caused by a change in the set temperature can be further suppressed. (Technology 8) The air-conditioning system described in any one of Technologies 4 to 7, wherein when all the set temperatures included in the aforementioned predetermined range conform to the first set temperature with the aforementioned change probability being equal to or higher than the predetermined threshold, the determination unit determines the set temperature with the highest comfort level of the air-conditioned space among the aforementioned predetermined range as the set temperature to be set in the aforementioned air conditioner. Accordingly, when it is impossible to determine an appropriate set temperature from the set temperatures included in the predetermined range and the change probability of any set temperature is relatively high, the set temperature to be set in the air conditioner can be determined as a set temperature that can suppress an increase in the number of changes in the set temperature. Accordingly, even when it is impossible to determine an appropriate set temperature after changing the set temperature multiple times, it is still possible to suppress an increase in the energy consumption of the air conditioner caused by the change in the set temperature. (Technology 9) The air-conditioning system described in any one of Technologies 4 to 7, wherein when all the set temperatures included in the aforementioned predetermined range conform to the third set temperature with the aforementioned change probability being less than the predetermined threshold, the determination unit determines the set temperature with the minimum energy consumption of the aforementioned air conditioner among the aforementioned predetermined range as the set temperature to be set in the aforementioned air conditioner. Accordingly, when it is impossible to determine an appropriate set temperature from the set temperatures included in the predetermined range and the change probability of any set temperature is relatively low, the set temperature to be set in the air conditioner can be determined as a set temperature with relatively low energy consumption of the air conditioner. Accordingly, even when it is impossible to determine an appropriate set temperature due to infrequent changes in the set temperature, it is still possible to suppress an increase in the energy consumption of the air conditioner caused by the change in the set temperature. (Technology 10) The air-conditioning system described in Technology 4, wherein when the set temperature included in the aforementioned predetermined range does not satisfy the aforementioned first condition, the determination unit executes the process for making the first condition hold, and the process for making the first condition hold is a process for enabling the set temperature included in the aforementioned predetermined range to satisfy the aforementioned first condition. Accordingly, when it is impossible to determine an appropriate set temperature from the predetermined range of set temperatures, the process for making the first condition hold can be executed. Therefore, it is possible to reduce the occurrence of situations such as being unable to determine an appropriate set temperature from the predetermined range of set temperatures during cooling, and it is possible to seek to suppress an increase in the energy consumption of the air conditioner. (Technique 11) The air conditioning system as described in Technique 10, wherein in the process for the establishment of the first condition when there is a fifth set temperature with one or more actual recorded counts among the set temperatures included in the aforementioned predetermined range, the change probability of the aforementioned fifth set temperature before the energy consumption of the aforementioned air conditioning device becomes minimum within the aforementioned predetermined range is less than the aforementioned predetermined threshold value, and when the first calculated temperature calculated according to a predetermined rule and higher than the aforementioned fifth set temperature does not exceed the highest set temperature within the aforementioned predetermined range, the aforementioned first calculated temperature is determined as the set temperature to be set for the aforementioned air conditioning device. Accordingly, in the process for the establishment of the first condition, the set temperature to be set for the air conditioning device can be determined as the set temperature with an actual recorded count of zero and a set temperature with relatively low comfort level of the air-conditioned space. Therefore, the possibility of changing from the set temperature with an actual recorded count of zero to other set temperatures can be increased. Accordingly, the occurrence of a situation where it is impossible to determine an appropriate set temperature from the predetermined range of the set temperature during cooling can be further reduced, and an effective increase in the energy consumption of the air conditioning device 1 can be suppressed. (Technique 12) The air conditioning system as described in Technique 11, wherein in the process for the establishment of the first condition when the change probability of the aforementioned fifth set temperature before the energy consumption of the aforementioned air conditioning device becomes minimum within the aforementioned predetermined range is less than the aforementioned predetermined threshold value and the first calculated temperature exceeds the highest set temperature within the aforementioned predetermined range, the set temperature with the minimum actual recorded count within the aforementioned predetermined range is determined as the set temperature to be set for the aforementioned air conditioning device. Thereby, in the process for the establishment of the first condition, the set temperature to be set for the air conditioning device can be determined as the set temperature with the minimum actual recorded count. Therefore, the possibility of changing from the set temperature with the minimum actual recorded count to other set temperatures can be increased. Accordingly, the occurrence of a situation where it is impossible to determine an appropriate set temperature from the predetermined range of the set temperature during cooling can be further reduced, and an effective increase in the energy consumption of the air conditioning device can be suppressed. (Technology 13) An air-conditioning system as described in any one of Technologies 10 to 12, wherein in the process for the establishment of the first condition when there is a fifth set temperature with an actual record number of 1 or more among the set temperatures included in the aforementioned predetermined range, the change probability of the aforementioned fifth set temperature before the energy consumption of the aforementioned air-conditioning device becomes the minimum within the aforementioned predetermined range is equal to or higher than the aforementioned predetermined threshold value, and when there is a sixth set temperature with an actual record number of zero between the lowest set temperature and the aforementioned fifth set temperature within the aforementioned predetermined range, the aforementioned sixth set temperature is determined as the set temperature to be set for the aforementioned air-conditioning device. Thereby, in the process for the establishment of the first condition, the set temperature to be set for the air-conditioning device can be determined as the sixth set temperature lower than the fifth set temperature with an actual record number of zero and the minimum energy consumption of the air-conditioning device. Therefore, the possibility that the actual record number of set temperatures lower than this fifth set temperature becomes 1 or more can be increased. Accordingly, in the case of cooling, the possibility that the predetermined range of the set temperature can satisfy the first condition can be increased, and an effective increase in the energy consumption of the air-conditioning device can be suppressed. (Technology 14) An air-conditioning system as described in Technology 13, wherein in the process for the establishment of the first condition when the change probability of the aforementioned fifth set temperature before the energy consumption of the aforementioned air-conditioning device becomes the minimum within the aforementioned predetermined range is equal to or higher than the aforementioned predetermined threshold value, and when there is no aforementioned sixth set temperature between the lowest set temperature and the aforementioned fifth set temperature within the aforementioned predetermined range, the set temperature with the minimum actual record number between the lowest set temperature and the aforementioned fifth set temperature before the energy consumption of the aforementioned air-conditioning device becomes the minimum within the aforementioned predetermined range is determined as the set temperature to be set for the aforementioned air-conditioning device. Thereby, in the process for the establishment of the first condition, the set temperature to be set for the air-conditioning device 1 can be determined as the set temperature lower than the fifth set temperature with the minimum energy consumption of the air-conditioning device and with the minimum actual record number. Therefore, the possibility that the actual record number of set temperatures lower than this fifth set temperature is increased can be increased. Accordingly, in the case of cooling, the possibility that the predetermined range of the set temperature can satisfy the first condition can be increased, and an effective increase in the energy consumption of the air-conditioning device 1 can be suppressed. (Technology 15) The air conditioning system as described in Technology 6, wherein when the set temperature within the aforementioned predetermined range does not satisfy the aforementioned second condition, the determination unit performs processing for the establishment of the second condition, and the processing for the establishment of the second condition is processing for making the set temperature within the aforementioned predetermined range satisfy the aforementioned second condition. Accordingly, when it is impossible to determine an appropriate set temperature from the predetermined range of the set temperature, the processing for the establishment of the second condition can be performed. Therefore, it is possible to reduce the occurrence of situations such as being unable to determine an appropriate set temperature from the predetermined range of the set temperature during heating, and it is possible to seek to suppress an increase in the energy consumption of the air conditioning device. (Technology 16) The air conditioning system as described in Technology 15, wherein when there is a fifth set temperature with an actual record number of 1 or more among the set temperatures within the aforementioned predetermined range in the aforementioned processing for the establishment of the second condition by the determination unit, and the change probability of the aforementioned fifth set temperature before the energy consumption of the aforementioned air conditioning device becomes the minimum within the aforementioned predetermined range is less than the aforementioned predetermined threshold value, and the second calculated temperature calculated according to a predetermined rule and lower than the aforementioned fifth set temperature does not fall below the lowest set temperature within the aforementioned predetermined range, the aforementioned second calculated temperature is determined as the set temperature to be set in the aforementioned air conditioning device. Accordingly, in the processing for the establishment of the second condition, the set temperature to be set in the air conditioning device can be determined as a set temperature with an actual record number of zero and a set temperature with relatively low comfort of the air-conditioned space. Therefore, it is possible to increase the possibility of changing from a set temperature with an actual record number of zero to other set temperatures. Accordingly, it is possible to further reduce the occurrence of situations such as being unable to determine an appropriate set temperature from the predetermined range of the set temperature during heating, and it is possible to effectively seek to suppress an increase in the energy consumption of the air conditioning device. (Technology 17) The air conditioning system as described in Technology 16, wherein when the change probability of the aforementioned fifth set temperature before the energy consumption of the aforementioned air conditioning device becomes the minimum within the aforementioned predetermined range is less than the aforementioned predetermined threshold value, and the aforementioned second calculated temperature is lower than the lowest set temperature within the aforementioned predetermined range, the set temperature with the minimum actual record number within the aforementioned predetermined range is determined as the set temperature to be set in the aforementioned air conditioning device. Thereby, in the processing for the establishment of the second condition, the set temperature to be set in the air conditioning device can be determined as the set temperature with the least actual record number. Therefore, it is possible to increase the possibility of changing from the set temperature with the least actual record number to other set temperatures. Accordingly, it is possible to further reduce the occurrence of situations such as being unable to determine an appropriate set temperature from the predetermined range of the set temperature during heating, and it is possible to effectively seek to suppress an increase in the energy consumption of the air conditioning device. (Technology 18) An air conditioning system as described in any one of Technologies 15 to 17, wherein in the process for the second condition to hold when there is a fifth set temperature with one or more actual recorded counts among the set temperatures included in the aforementioned predetermined range, the change probability of the aforementioned fifth set temperature before the energy consumption of the aforementioned air conditioning device becomes minimum within the aforementioned predetermined range is equal to or higher than the aforementioned predetermined threshold value, and when there is a sixth set temperature with zero actual recorded counts between the highest set temperature and the aforementioned fifth set temperature within the aforementioned predetermined range, the aforementioned sixth set temperature is determined as the set temperature to be set for the aforementioned air conditioning device. Thereby, in the process for the second condition to hold, the set temperature to be set for the air conditioning device can be determined as the sixth set temperature with zero actual recorded counts and higher than the fifth set temperature at which the energy consumption of the air conditioning device becomes minimum. Therefore, the possibility that the actual recorded count of set temperatures higher than this fifth set temperature becomes one or more can be increased. Accordingly, during heating, the possibility that the predetermined range of the set temperature can satisfy the second condition can be increased, and an increase in the energy consumption of the air conditioning device can be effectively suppressed. (Technology 19) An air conditioning system as described in Technology 18, wherein in the process for the second condition to hold when the change probability of the aforementioned fifth set temperature before the energy consumption of the aforementioned air conditioning device becomes minimum within the aforementioned predetermined range is equal to or higher than the aforementioned predetermined threshold value, and when there is no aforementioned sixth set temperature between the highest set temperature and this fifth set temperature within the aforementioned predetermined range, the set temperature with the minimum actual recorded count between the highest set temperature and the aforementioned fifth set temperature at which the energy consumption of the aforementioned air conditioning device becomes minimum within the aforementioned predetermined range is determined as the set temperature to be set for the aforementioned air conditioning device. Thereby, in the process for the second condition to hold, the set temperature to be set for the air conditioning device can be determined as a set temperature higher than the fifth set temperature at which the energy consumption of the air conditioning device becomes minimum and with the minimum actual recorded count. Therefore, the possibility of increasing the actual recorded count of set temperatures higher than this fifth set temperature can be increased. Accordingly, during heating, the possibility that the predetermined range of the set temperature can satisfy the second condition can be increased, and an increase in the energy consumption of the air conditioning device 1 can be effectively suppressed. (Technology 20) A control method for an air conditioning system, which air-conditions an air-conditioned space by an air conditioning device, the control method for the air conditioning system being: memorizing the number of times of change in which the set temperature of the air conditioning device has been changed for each set temperature of the air conditioning device; determining the set temperature to be set for the air conditioning device based on the memorized number of times of change. Accordingly, the same effects as those of the air conditioning system described in Technology 1 can be achieved. (Technology 21) A program causes a computer of an air-conditioning system that air-conditions an air-conditioned space by means of an air-conditioning device to function as a determination unit. The determination unit determines the set temperature to be set in the air-conditioning device based on the number of changes memorized by a memory unit that memorizes the number of changes in the set temperature of the air-conditioning device for each set temperature of the air-conditioning device. Accordingly, the same effects as those of the air-conditioning system described in Technology 1 can be exhibited. Industrial applicability As described above, the air-conditioning system, the control method of the air-conditioning system, and the program of the present invention can be used for the purpose of determining the set temperature to be set in the air-conditioning device. 1: Air-conditioning device 2: Terminal device 3: Management server 4: Meteorological server 11: Indoor unit 12: Outdoor unit 13: Remote controller 14: Communication device 30: Server control device (computer) 31: Server communication device 300: Server processor 301: Communication control unit 302: Acquisition unit 303: Update unit 304: Determination unit 305: Setting unit 310: Server memory (memory unit) 311: Control program (program) 312: Management DB 1000: Air-conditioning system AD: Collected data H: Facility MD: Management data MD1: First management data MD2: Second management data NW: Network P: Manager R: Record RD: Operation data S: Air-conditioned space SA1~SA4, SA31~SA37, SA41~SA44, SB1~SB4, SB31~SB39, SC1~SC4, SC31~SC34: Steps SD: Setting data FIG. 1 is a diagram showing the configuration of the air conditioning system in Embodiment 1. FIG. 2 is a diagram showing the configuration of the management server in Embodiment 1. FIG. 3 is a diagram showing an example of the first management data in Embodiment 1. FIG. 4 is a diagram showing an example of the second management data in Embodiment 1. FIG. 5 is a diagram for explaining the update of the actual record count in Embodiment 1. FIG. 6 is a diagram for explaining the update of the change count in Embodiment 1. FIG. 7 is a flowchart showing the operation of the management server in Embodiment 1. FIG. 8 is a flowchart showing the operation of the determination unit in the determination process of Embodiment 1. FIG. 9 is a diagram showing an example of the collected data in Embodiment 1. FIG. 10 is a flowchart showing the operation of the determination unit in the determination process of Embodiment 1. FIG. 11 is a flowchart showing the operation of the management server in Embodiment 2. FIG. 12 is a flowchart showing the operation of the determination unit in the process for the establishment of the first condition in Embodiment 2. FIG. 13 is a diagram showing an example of the collected data in Embodiment 2. FIG. 14 is a diagram showing an example of the collected data in Embodiment 2. FIG. 15 is a diagram showing an example of the collected data in Embodiment 2. FIG. 16 is a flowchart showing the operation of the management server in Embodiment 2. FIG. 17 is a flowchart showing the operation of the determination unit in the process for the establishment of the second condition in Embodiment 2. FIG. 18 is a diagram showing an example of the collected data in Embodiment 2. 1: Air conditioner 2: Terminal device 3: Management server 4: Meteorological server 11: Indoor unit 12: Outdoor unit 13: Remote controller 14: Communication device 1000: Air conditioning system H: Facility NW: Network P: Manager RD: Operation data S: Air-conditioned space SD: Setting data

Claims

1. An air conditioning system that air-conditions a space by means of an air conditioning device, the air conditioning system comprising: a memory unit that stores the number of times the set temperature of the air conditioning device has been changed for each set temperature of the air conditioning device; and a decision unit that determines the set temperature to be set on the air conditioning device based on the number of changes stored in the memory unit.

2. The air conditioning system of claim 1, which includes an acquisition unit for acquiring the outside air temperature, wherein the aforementioned memory unit stores the aforementioned number of changes to each set temperature of the aforementioned air conditioning device in combination with a time period and the outside air temperature, and the aforementioned decision unit determines the set temperature to be set on the aforementioned air conditioning device based on the aforementioned number of changes stored in the aforementioned memory unit and the combination of the aforementioned time period including the current time and the outside air temperature acquired by the aforementioned acquisition unit corresponding to the aforementioned number of changes.

3. The air conditioning system of claim 2, wherein the aforementioned acquisition unit obtains the forecast value of the outside air temperature for the time period prior to the current time from the meteorological data service, and obtains the outside air temperature based on the obtained forecast value.

4. The air conditioning system of claim 1, wherein the aforementioned memory unit stores the number of times the set temperature has been set in the aforementioned air conditioning device, i.e., the actual number of records, the number of changes, and the probability of change for each set temperature within a predetermined range of set temperatures included in the aforementioned air conditioning device, wherein the probability of change is calculated from the aforementioned actual number of records and the aforementioned number of changes and is the probability that the set temperature has been changed; wherein, when the aforementioned air conditioning device is operating in cooling mode, if the set temperature within the aforementioned predetermined range already satisfies the first condition that there are a first set temperature and a second set temperature, the aforementioned decision unit determines the aforementioned second set temperature as the set temperature to be set in the aforementioned air conditioning device, wherein the aforementioned first set temperature is a temperature with a probability of change of more than a predetermined threshold, and the aforementioned second set temperature is a temperature within the aforementioned predetermined range that is the second lowest value of the aforementioned first set temperature and the aforementioned probability of change is less than the aforementioned predetermined threshold.

5. The air conditioning system of claim 4, wherein the aforementioned determining unit determines to set the aforementioned air conditioning device to the aforementioned second setting temperature when the set temperature within the aforementioned predetermined range satisfies the aforementioned first condition and there are a plurality of the aforementioned second setting temperatures within the aforementioned predetermined range.

6. The air conditioning system of claim 1, wherein the aforementioned memory unit stores the number of times a set temperature has been set on the aforementioned air conditioning device, i.e., the actual number of records, the number of changes, and the probability of change for each set temperature within a predetermined range of set temperatures included in the aforementioned air conditioning device, wherein the probability of change is calculated from the aforementioned actual number of records and the aforementioned number of changes and is the probability that the set temperature has been changed; wherein, when the aforementioned air conditioning device is operating in heating mode, if the aforementioned determination unit satisfies the second condition that there are a third set temperature and a fourth set temperature within the aforementioned predetermined range, then the aforementioned third set temperature is determined as the set temperature to be set on the aforementioned air conditioning device, wherein the aforementioned third set temperature is a temperature where the probability of change is less than a predetermined threshold, and the aforementioned fourth set temperature is a temperature within the aforementioned predetermined range that is the second lowest value of the aforementioned third set temperature and where the probability of change is greater than or equal to the aforementioned predetermined threshold.

7. The air conditioning system of claim 6, wherein the aforementioned determining unit determines to set the aforementioned air conditioning device to the aforementioned third setting temperature when the set temperature within the aforementioned predetermined range satisfies the aforementioned second condition and there are a plurality of the aforementioned third setting temperatures within the aforementioned predetermined range.

8. In the air conditioning system of request item 4 or 6, if all set temperatures within the aforementioned predetermined range meet the first set temperature where the probability of change is above the predetermined threshold, the aforementioned determining unit determines the set temperature within the aforementioned predetermined range where the comfort of the air-conditioned space is the highest as the set temperature to be set in the aforementioned air conditioning device.

9. In the air conditioning system of claim 4 or 6, if all set temperatures within the aforementioned predetermined range meet the third set temperature where the probability of change is less than the aforementioned predetermined threshold, the aforementioned determining unit determines the set temperature within the aforementioned predetermined range where the energy consumption of the aforementioned air conditioning device is minimized as the set temperature to be set for the aforementioned air conditioning device.

10. The air conditioning system of claim 4, wherein the aforementioned decision unit performs a first condition fulfillment process when the set temperature within the aforementioned predetermined range does not meet the aforementioned first condition, the aforementioned first condition fulfillment process is a process used to make the set temperature within the aforementioned predetermined range meet the aforementioned first condition.

11. In the air conditioning system of claim 10, if the aforementioned decision unit determines that, in the first condition fulfillment process, when there is a fifth set temperature with more than one actual record among the set temperatures included in the aforementioned predetermined range, the aforementioned probability of change of the aforementioned fifth set temperature is less than the aforementioned predetermined threshold before the energy consumption of the aforementioned air conditioning device becomes minimal within the aforementioned predetermined range, and a first calculated temperature higher than the aforementioned fifth set temperature calculated according to a predetermined rule does not exceed the highest set temperature within the aforementioned predetermined range, the aforementioned first calculated temperature is determined as the set temperature to be set for the aforementioned air conditioning device.

12. In the air conditioning system of claim 11, if the probability of change of the aforementioned fifth set temperature is less than the aforementioned predetermined threshold before the energy consumption of the aforementioned air conditioning device becomes the minimum within the aforementioned predetermined range, and the aforementioned first calculated temperature exceeds the highest set temperature within the aforementioned predetermined range, then the set temperature with the minimum actual recorded number within the aforementioned predetermined range shall be determined as the set temperature to be set for the aforementioned air conditioning device.

13. In the air conditioning system of claim 10, if the aforementioned decision unit determines that, in the processing of the first condition being met when there is a fifth set temperature with more than one actual record among the set temperatures included in the aforementioned predetermined range, the aforementioned change probability of the aforementioned fifth set temperature is above the aforementioned predetermined threshold when the energy consumption of the aforementioned air conditioning device becomes minimal within the aforementioned predetermined range, and if there is a sixth set temperature with zero actual record among the aforementioned fifth set temperature from the lowest set temperature within the aforementioned predetermined range, then the aforementioned sixth set temperature is determined to be the set temperature to be set for the aforementioned air conditioning device.

14. The air conditioning system of claim 13, wherein the aforementioned determination unit determines the setting temperature of the aforementioned fifth set temperature to be set at the predetermined temperature when the aforementioned change probability of the aforementioned fifth set temperature before the energy consumption of the aforementioned air conditioning device becomes the minimum within the aforementioned predetermined range is above the aforementioned predetermined threshold, and when there is no aforementioned sixth set temperature between the aforementioned fifth set temperature and the lowest set temperature within the aforementioned predetermined range, the set temperature between the aforementioned fifth set temperature and the lowest set temperature within the aforementioned predetermined range where the actual number of records is the minimum is determined to be set at the aforementioned air conditioning device.

15. The air conditioning system of claim 6, wherein the aforementioned decision unit performs a second condition fulfillment process when the set temperature within the aforementioned predetermined range does not meet the aforementioned second condition, the aforementioned second condition fulfillment process is a process used to make the set temperature within the aforementioned predetermined range meet the aforementioned second condition.

16. In the air conditioning system of claim 15, if the aforementioned decision unit determines that, in the processing of the second condition being met when there is a fifth set temperature with more than one actual record within the set temperature range, the probability of change of the fifth set temperature is less than the aforementioned predetermined threshold before the energy consumption of the air conditioning device becomes minimal within the aforementioned predetermined range, and a second calculated temperature lower than the aforementioned fifth set temperature calculated according to a predetermined rule is not lower than the lowest set temperature within the aforementioned predetermined range, then the aforementioned second calculated temperature is determined as the set temperature to be set for the aforementioned air conditioning device.

17. In the air conditioning system of claim 16, if the probability of change of the aforementioned fifth set temperature is less than the aforementioned predetermined threshold before the energy consumption of the aforementioned air conditioning device becomes the minimum within the aforementioned predetermined range, and the aforementioned second calculated temperature is lower than the lowest set temperature within the aforementioned predetermined range, then the set temperature with the smallest actual recorded number within the aforementioned predetermined range shall be determined as the set temperature to be set for the aforementioned air conditioning device.

18. In the air conditioning system of claim 15, if the aforementioned determination unit, in the aforementioned second condition fulfillment process, when there is a fifth set temperature with more than one actual record among the set temperatures included in the aforementioned predetermined range, the aforementioned change probability of the aforementioned fifth set temperature before the energy consumption of the aforementioned air conditioning device becomes minimal in the aforementioned predetermined range is above the aforementioned predetermined threshold, and if there is a sixth set temperature with zero actual record among the aforementioned fifth set temperature from the highest set temperature in the aforementioned predetermined range, the aforementioned sixth set temperature is determined to be the set temperature to be set for the aforementioned air conditioning device.

19. The air conditioning system of claim 18, wherein the aforementioned determination unit determines the setting temperature of the fifth set temperature to be set at the predetermined temperature when the aforementioned probability of change of the aforementioned fifth set temperature before the energy consumption of the aforementioned air conditioning device becomes the minimum within the aforementioned predetermined range is greater than or equal to the aforementioned predetermined threshold, and when there is no aforementioned sixth set temperature between the highest set temperature and the aforementioned fifth set temperature within the aforementioned predetermined range, the set temperature between the highest set temperature and the aforementioned fifth set temperature before the energy consumption of the aforementioned air conditioning device becomes the minimum is the set temperature of the aforementioned air conditioning device.

20. A method for controlling an air conditioning system, wherein an air conditioning device is used to air-condition a space, the method comprising: memorizing the number of times the set temperature of the air conditioning device has been changed for each set temperature of the air conditioning device; and determining the set temperature to be set on the air conditioning device based on the memorized number of changes.

21. A program that enables a computer of an air conditioning system that uses an air conditioning device to air-condition a space to function as a decision unit, wherein the decision unit determines the set temperature to be set on the air conditioning device based on the number of times the set temperature of the air conditioning device has been changed, which is stored in a memory unit that stores the number of times the set temperature of the air conditioning device has been changed for each set temperature of the air conditioning device.

22. An air conditioning system that air-conditions a space by means of an air conditioning device, the air conditioning system comprising: a determination unit that determines a set temperature to be set on the air conditioning device based on a change probability of a set temperature calculated from the number of setting times and the number of change times, wherein the number of setting times indicates the number of times a specific set temperature has been set, and the number of change times indicates the number of times the specific set temperature has been changed to another set temperature; and a setting unit that sets the set temperature determined by the determination unit on the air conditioning device.

23. The air conditioning system of claim 22, which has a memory unit that remembers the aforementioned change probability for a plurality of set temperatures, wherein the decision unit determines the set temperature set on the aforementioned air conditioning device based on the aforementioned change probability remembered by the memory unit.

24. The air conditioning system of claim 23, wherein the aforementioned memory unit stores the aforementioned change probability corresponding to the aforementioned plurality of set temperatures by combining time and outside air temperature, and the aforementioned decision unit specifies the aforementioned change probability to be referenced based on the combination of target time and outside air temperature at that target time, and determines the set temperature set on the aforementioned air conditioning device based on specifying the aforementioned change probability.

25. In the case of an air conditioning system as requested in item 23 or 24, where there are multiple set temperatures among the aforementioned multiple set temperatures that satisfy the aforementioned change probability conditions, the aforementioned decision unit determines the set temperature among the set temperatures that satisfy the aforementioned conditions that would improve the comfort of the air-conditioned space as the set temperature to be set in the aforementioned air conditioning device.

26. In the air conditioning system of claim 23 or 24, if there are multiple set temperatures among the aforementioned multiple set temperatures that satisfy the aforementioned change probability conditions, the aforementioned decision unit shall determine the set temperature among the set temperatures that satisfy the aforementioned conditions where the energy consumption of the aforementioned air conditioning device is reduced as the set temperature to be set for the aforementioned air conditioning device.

27. In the air conditioning system of claim 23 or 24, if the aforementioned air conditioning device is operating the cooling system and the probability of the change of the aforementioned first set temperature is above a predetermined threshold, and the probability of the change of the second set temperature, which is lower than the aforementioned first set temperature, is less than the aforementioned predetermined threshold, the aforementioned decision unit shall determine the aforementioned second set temperature as the set temperature to be set in the aforementioned air conditioning device.

28. In the air conditioning system of claim 23 or 24, if the aforementioned air conditioning device is performing heating and the probability of a change in the third set temperature is less than a predetermined threshold, and the probability of a change in the fourth set temperature, which is next to the aforementioned third set temperature, is greater than or equal to the aforementioned predetermined threshold, the aforementioned decision unit shall determine the aforementioned third set temperature as the set temperature to be set in the aforementioned air conditioning device.

29. A management server for managing an air conditioning device that conditioned a space, the management server comprising: a determination unit that determines a set temperature to be set on the air conditioning device based on the probability of a set temperature change calculated from the number of setting times and the number of change times, wherein the number of setting times indicates the number of times a specific set temperature has been set, and the number of change times indicates the number of times the specific set temperature has been changed to another set temperature; and a setting unit that sets the set temperature determined by the determination unit on the air conditioning device.

30. A method for controlling an air conditioning system, wherein an air conditioning device is used to air-condition a space, the method comprising: determining a set temperature to be set on the air conditioning device based on the probability of change of a set temperature calculated from the number of setting times and the number of change times, wherein the number of setting times represents the number of times a specific set temperature has been set, and the number of change times represents the number of times the specific set temperature has been changed to another set temperature; and setting the determined set temperature on the air conditioning device.

31. A program that enables a computer of an air conditioning system that conditioned a space by means of an air conditioning device to function as a decision-making unit and a setting unit, wherein the decision-making unit determines the set temperature to be set on the air conditioning device based on the probability of change of the set temperature calculated by the number of setting times and the number of change times, wherein the number of setting times indicates the number of times a specific set temperature has been set, and the number of change times indicates the number of times the specific temperature has been changed to another set temperature, and the setting unit sets the set temperature determined by the decision-making unit on the air conditioning device.

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