Information providing device, information providing system, control method and program

Abstract

To provide an information providing device, an information providing system, a control method, and a program capable of providing information effective for determining a risk of secondary infection in an air-conditioned space.SOLUTION: A contact information generation portion 102 discriminates persons staying in an air-conditioned space from images of the air-conditioned space, determining distances and positional relations of the discriminated persons, and generating contact information 1062 indicating the discriminated persons, presence or absence of contact of the persons, and the positional relationships of the persons. A providing portion 104 refers to the contact information 1062 to identify one or more contact persons having contacted one or more infected persons of an infection disease, and the positional relations of the infected persons and the contact persons, identifies environment information of a period when the contact persons stay in the air-conditioned space with the infected persons, in the environment information 1061 including operation information 1063 indicating an operation state of an air conditioner and state information 1064 indicating a state of the air in the air-conditioned space, and provides the discrimination information for discriminating the contact persons, the information indicating the positional relations, and the environment information as secondary infection risk information.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present disclosure relates to an information providing device, an information providing system, a control method, and a program. [Background technology]

[0002] In recent years, there has been a demand for information on infection risks in order to understand the risk of infection with infectious diseases in daily life. In response to this demand, various technologies have been proposed. For example, Patent Document 1 discloses a technology for identifying people who are suspected of excreting infectious substances such as viruses from among people present in a space, and displaying information on the identified people. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2019-083395 Summary of the Invention [Problem to be solved by the invention]

[0004] For infectious diseases that are transmitted through the air and droplets, the risk of secondary infection varies depending on the air quality in the space and the relative positions of people. In particular, in air-conditioned spaces where air conditioning is controlled by an air conditioner, the operating status of the air conditioner affects the air quality, and so the risk of secondary infection varies. Therefore, in order to grasp the risk of secondary infection more accurately, it is necessary to provide information on the air quality in air-conditioned spaces, the operating status of the air conditioner, the relative positions of people, etc.

[0005] The present disclosure has been made in consideration of the above-mentioned circumstances, and aims to provide an information providing device, an information providing system, a control method, and a program capable of providing information useful for determining the risk of secondary infection in an air-conditioned space. [Means for solving the problem]

[0006] In order to achieve the above object, an information providing device according to the present disclosure includes: An environmental information acquisition means for acquiring environmental information including operating information indicating an operating status of an air conditioner that controls the air conditioning of a space to be air-conditioned and status information indicating an air condition of the space to be air-conditioned; a contact information generating means for acquiring an image of the air-conditioned space, identifying people present in the air-conditioned space from the acquired image, determining the distance and positional relationship between the identified people, and generating contact information indicating the identified people, whether or not there is contact between the people, and the positional relationship between the people; A storage means for storing the acquired environmental information and the generated contact information; An infected person information acquisition means for acquiring infected person information indicating a person infected with an infectious disease; a provision means for referring to the stored contact information, identifying a contact person who has come into contact with an infected person related to the acquired infected person information and a positional relationship between the infected person and the contact person, identifying environmental information from the stored environmental information for a period when the contact person was present in the air-conditioned space together with the infected person, and providing identification information for identifying the contact person, information indicating the identified positional relationship, and the identified environmental information as secondary infection risk information; The operating information includes information indicating the strength of airflow of the air conditioner, The status information includes information indicating a carbon dioxide concentration and a volatile organic compound concentration in the air conditioned space, The information indicating the strength of the airflow is used to determine whether or not the person is a contact person. The information indicating the concentration of carbon dioxide and the concentration of volatile organic compounds is used to determine whether or not ventilation is required for the air-conditioned space. In order to It is used in. Effect of the Invention

[0007] According to the present disclosure, it is possible to provide an information providing device, an information providing system, a control method, and a program capable of providing information useful for determining the risk of secondary infection in an air-conditioned space. [Brief description of the drawings]

[0008] [Figure 1] Block diagram of an information providing system according to a first embodiment. [Diagram 2] FIG. 1 is a block diagram showing a hardware configuration of an information providing device according to a first embodiment. [Diagram 3] FIG. 1 is a block diagram showing a functional configuration of an information providing device according to a first embodiment. [Figure 4] FIG. 1 is a diagram showing an example of environmental information according to the first embodiment. [Diagram 5] FIG. 1 is a diagram showing an example of contact information according to the first embodiment. [Figure 6] FIG. 1 is a diagram showing an example of infection condition information according to the first embodiment. [Figure 7] FIG. 1 is a diagram showing an example of secondary infection risk information according to the first embodiment. [Figure 8] 1 is a flowchart showing a contact information generating process executed by the information providing device according to the first embodiment. [Figure 9] 1 is a flowchart showing an information providing process executed by the information providing device according to the first embodiment; [Figure 10] 1 is a flowchart showing an infection risk value calculation process executed by an information providing device according to a first embodiment. [Figure 11] Block diagram of an information providing system according to a second embodiment. [Figure 12] FIG. 13 is a diagram showing an example of secondary infection information according to the second embodiment. [Figure 13] 11 is a flowchart showing an information providing process executed by an information providing device according to a second embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] (Embodiment 1) The information providing system 1 according to the first embodiment is a system that provides information regarding the risk of secondary infection.

[0010] 1, the information providing system 1 includes one or more information providing devices 100 and one or more air conditioners 200. The information providing device 100 is connected to the air conditioner 200 via a network 500 so as to be able to communicate with each other.

[0011] The information providing device 100 provides information on the risk of secondary infection of people 400 present in the air-conditioned space 300, based on operation information of the air conditioner 200 and the air condition of the air-conditioned space 300, both transmitted from the air conditioner 200. The information providing device 100 is, for example, a system controller having a function of controlling the air conditioner 200.

[0012] The air conditioner 200 controls the air conditioning of the air conditioned space 300. The air conditioner 200 includes one or more indoor units 201 and one or more outdoor units 202. The indoor units 201 are disposed inside the air conditioned space 300, and the outdoor units 202 are disposed outside the air conditioned space 300. The air conditioner 200 transmits operating information indicating the operating state to the information providing device 100 at a predetermined cycle.

[0013] The air conditioner 200 also includes a camera 203 that acquires images of the air conditioned space 300, and various sensors for acquiring information indicating the state of the air in the air conditioned space 300. The sensors are, for example, a temperature and humidity sensor 204 that detects the temperature and humidity of the air conditioned space 300, a CO2 concentration sensor 205 that detects the concentration of carbon dioxide, and a VOC concentration sensor 206 that detects the concentration of volatile organic compounds. The camera 203, the temperature and humidity sensor 204, the CO2 concentration sensor 205, and the VOC concentration sensor 206 acquire images of the air conditioned space 300 and information indicating the state of the air at predetermined intervals. The camera 203 and the various sensors are communicably connected to the indoor unit 201, and transmit the acquired information to the information providing device 100 via the indoor unit 201.

[0014] The network 500 is a wireless or wired communication network, such as the Internet, an intranet, an extranet, a LAN (Local Area Network), a VPN (Virtual Private Network), or a telephone network.

[0015] Next, the hardware configuration of the information providing device 100 will be described with reference to FIG.

[0016] First, a hardware configuration of the information providing device 100 will be described. The information providing device 100 has a processor 11 that executes various processes, a main memory unit 12 used as a working area for the processor 11, an auxiliary memory unit 13 that stores various data used in the processing of the processor 11, a communication unit 14 for communicating with an external device, an input unit 15 that acquires input information, an output unit 16 that presents various information, and an RTC (Real Time Clock) 17 that keeps time. The main memory unit 12, the auxiliary memory unit 13, the communication unit 14, the input unit 15, the output unit 16, and the RTC 17 are all connected to the processor 11 via a bus 18.

[0017] The processor 11 includes a CPU (Central Processing Unit). The processor 11 executes programs stored in the auxiliary storage unit 13 to realize various functions of the information providing device 100.

[0018] The main memory unit 12 includes a RAM (Random Access Memory). Programs are loaded into the main memory unit 12 from the auxiliary memory unit 13. The main memory unit 12 is used as a working area for the processor 11.

[0019] The auxiliary storage unit 13 includes a non-volatile memory such as an EEPROM (Electrically Erasable Programmable Read-Only Memory). In addition to programs, the auxiliary storage unit 13 stores various data used in the processing of the processor 11. In accordance with instructions from the processor 11, the auxiliary storage unit 13 supplies the processor 11 with data used by the processor 11 and stores the data supplied from the processor 11.

[0020] The communication unit 14 includes a network interface circuit for communicating with an external device. The communication unit 14 receives a signal from the external device and outputs data indicated by the signal to the processor 11. The communication unit 14 also transmits a signal indicating the data output from the processor 11 to the external device.

[0021] The input unit 15 includes input devices such as an input key, a pointing device, etc. The input unit 15 acquires information input by a user of the information providing device 100, and notifies the processor 11 of the acquired information.

[0022] The output unit 16 includes output devices such as an LCD (Liquid Crystal Display) and a speaker. The output unit 16 may be configured as a touch screen integrally formed with a pointing device constituting the input unit 15. The output unit 16 presents various information to the user according to instructions from the processor 11.

[0023] The RTC 17 is a clock device that includes an oscillation circuit using a crystal oscillator. The RTC 17 includes, for example, a built-in battery and continues to measure time even when the information providing device 100 is powered off.

[0024] Next, the function of the information providing device 100 will be described with reference to FIG.

[0025] Functionally, the information providing device 100 comprises an environmental information acquisition unit 101 that acquires environmental information 1061 from the air conditioner 200, a contact information generation unit 102 that generates contact information 1062 regarding people present in the air-conditioned space 300, an infected person information acquisition unit 103 that acquires infected person information, a providing unit 104 that provides information regarding the risk of secondary infection, an infection risk calculation unit 105 that calculates an infection risk value, and a memory unit 106 that stores the environmental information 1061 and the contact information 1062.

[0026] The environmental information acquisition unit 101 acquires environmental information 1061. The environmental information 1061 is information including operation information 1063 indicating the operation status of the air conditioner 200 that controls the air conditioning of the air conditioned space 300, and status information 1064 indicating the state of the air in the air conditioned space 300. The environmental information acquisition unit 101 is realized by cooperation between the processor 11 and the communication unit 14. The environmental information acquisition unit 101 is an example of an environmental information acquisition means.

[0027] The operation information 1063 is, for example, information indicating the strength of the airflow of the air conditioner 200. The status information 1064 is, for example, information indicating values ​​detected by the temperature and humidity sensor 204, the CO2 concentration sensor 205, and the VOC concentration sensor 206. The information on the strength of the airflow is used to determine whether or not the person is a contact person, as described later, the information detected by the temperature and humidity sensor 204 is used to calculate a risk value, as described later, and the information detected by the CO2 concentration sensor 205 and the VOC concentration sensor 206 is used to determine whether or not ventilation is performed in the air-conditioned space, as described later. The environmental information acquisition unit 101 receives the operation information 1063 and the status information 1064 from the air conditioner 200 at a predetermined cycle, and stores the received information in the storage unit 106.

[0028] FIG. 4 shows an example of environmental information 1061. The environmental information 1061 includes operation information 1063 and status information 1064 in association with each other. Specifically, the environmental information 1061 includes the time at which each value was acquired, the airflow strength of the air conditioner 200, the temperature of the air-conditioned space 300, the humidity, the CO2 concentration, and the VOC concentration in association with each other. The first row of the table in FIG. 4 indicates that at the time "9:00:00 on September 14, 2020", the airflow strength of the air conditioner 200 is "high", the temperature of the air-conditioned space 300 is "20°C", the humidity is "58%, the CO2 concentration is "900 ppm", and the VOC concentration is "0.03 ppm".

[0029] The contact information generating unit 102 acquires an image of the air-conditioned space 300, identifies people present in the air-conditioned space 300, and determines the distance and positional relationship between the identified people. The contact information generating unit 102 then generates contact information indicating the presence or absence of contact between people and their positional relationship. The process for generating the contact information is performed at regular intervals. This regular period can be arbitrarily determined by the user of the information providing device 100, and is determined, for example, taking into consideration the time when it is determined that the possibility of infection is high. Hereinafter, this regular period is referred to as a "first period" and is set to 7.5 minutes. The contact information generating unit 102 is realized by the processor 11 and the communication unit 14 working together. The contact information generating unit 102 is an example of a contact information generating means.

[0030] Here, the air-conditioned space 300 is assumed to be an indoor space used by specific people, such as an office or a school. In the air-conditioned space 300, a plurality of seats are provided, and seat position information in the space and identification information for identifying the person to whom the seat is assigned are associated and stored in the storage unit 106. Hereinafter, information in which seat position information and person identification information are associated is referred to as seat information. For example, it is assumed that "Person A", "Person B", "Person C", etc. are assigned "Seat A", "Seat B", "Seat C", etc. The contact information generating unit 102 identifies the people present in the air-conditioned space 300 based on the positions of the people obtained from the image of the air-conditioned space 300 and the seat information.

[0031] Specifically, the contact information generating unit 102 analyzes the image acquired from the camera 203 and determines whether or not multiple people are present in the air-conditioned space 300. When the contact information generating unit 102 determines that multiple people are present, it obtains the positions of the people in the air-conditioned space 300, and identifies the seat closest to the position where the person is present as the seat where the person is present, with reference to the seat information. Next, the contact information generating unit 102 obtains identification information associated with the identified seat with reference to the seat information, and identifies the person indicated by the identification information as a person present in the air-conditioned space 300. For example, when the contact information generating unit 102 determines that the seat closest to the position where the person is present is "seat A," it identifies the person present in the air-conditioned space 300 as "person A."

[0032] Next, the contact information generating unit 102 determines the distance between people present in the air-conditioned space 300. For example, when the identified people are "person A" and "person B," the contact information generating unit 102 refers to the seat information to determine position information of "seat A" and "seat B" of "person A" and "person B," and determines the distance between "seat A" and "seat B" as the distance between "person A" and "person B." Note that the contact information generating unit 102 may determine the distance between "person A" and "person B" by analyzing an image, rather than from the seat position information.

[0033] Then, the contact information generating unit 102 judges whether people present in the air-conditioned space 300 are located close to each other for a certain period of time. For example, the contact information generating unit 102 compares the analysis result of the most recently acquired image with the analysis result of the image immediately before the most recently acquired image, and judges whether the two images include multiple identical people. If it is judged that multiple identical people are included, it judges whether the distance between the same people is continuously close. Whether or not the people are close to each other is judged based on whether or not the distance between the people exceeds a predetermined distance threshold. The predetermined distance threshold is, for example, a value indicating the distance at which there is a risk of droplet infection, and is set to "1 m."

[0034] For example, when the contact information generating unit 102 determines from the analysis results of the most recently acquired image and the analysis results of the previous image that both images contain "person A" and "person B," it considers that "person A" and "person B" continue to be present in the same air-conditioned space 300. Then, when the contact information generating unit 102 determines from the analysis results of the most recently acquired image that the distance between "person A" and "person B" is equal to or less than the distance threshold of "1 m" and also from the analysis results of the previous image that the distance between "person A" and "person B" is equal to or less than the distance threshold of "1 m," it considers that "person A" and "person B" were located in close proximity during the first period and determines that "person B" is a contact of "person A," and that "person A" is a contact of "person B."

[0035] The contact information generating unit 102 also determines the positional relationship between people present in the air-conditioned space 300. The positional relationship is represented, for example, by items such as "downwind", "upwind" and "other". "Downwind" indicates a positional relationship in which one person is located downwind of another person, "upwind" indicates a positional relationship in which one person is located upwind of another person, and "other" indicates a positional relationship not included in "downwind" and "upwind". For example, when the air conditioner 200 is blowing air, i.e., when the blowing strength in Fig. 4 is other than "stopped", the positional relationship is determined from the position of the air conditioner 200 and the positions of people present in the air-conditioned space 300.

[0036] Even if the contact information generating unit 102 determines that the distance between people exceeds a predetermined distance threshold, if one person is downwind of the other person, the contact information generating unit 102 determines that the two people are in contact. For example, if the contact information generating unit 102 determines that "person B" is downwind of "person A" when the distance between "person A" and "person B" is more than "1 m" but less than "2 m," the contact information generating unit 102 determines that "person B" is a contact of "person A" and that "person A" is a contact of "person B."

[0037] Furthermore, when the distance between "person A" and "person B" exceeds "2 m," but "person B" is downwind of "person A," and the airflow strength is "strong," the contact information generation unit 102 determines that "person B" is a person in contact with "person A," and that "person A" is a person in contact with "person B."

[0038] Furthermore, the contact information generating unit 102 determines from the acquired image whether the identified person is wearing a mask.

[0039] When the contact information generating unit 102 identifies the contact persons, the contact information generating unit 102 generates contact information for each contact person and stores the contact information in the storage unit 106 .

[0040] FIG. 5 shows an example of contact information. The contact information in FIG. 5 is contact information for "person A." The contact information includes the time when it was determined that there was a contact, information identifying the contacts who came into contact with "person A," information indicating the positional relationship of "downwind," "upwind," and "other," and information indicating whether "person A" was wearing a mask, all in association with each other. The first row of the table in FIG. 5 indicates that at the time "9:00:00 on September 14, 2020," among the contacts who came into contact with "person A," the person who was located downwind was "person B" and the person who was located upwind was "person C," and that "person A" was wearing a mask at this time.

[0041] The contact information generation unit 102 generates contact information as shown in FIG. 5 for each of "person A," "person B," "person C," ... and stores it in the memory unit 106. The contact information stored in the memory unit 106 is deleted after a certain period of time has passed. This certain period can be determined arbitrarily by the user of the information providing device 100. In this embodiment, the certain period of time is a period that is sufficiently longer than the incubation period of the infectious disease, for example, 14 days.

[0042] 3 acquires infected person information indicating a person infected with an infectious disease. The infected person information acquisition unit 103 is realized by cooperation between the processor 11, the communication unit 14, and the input unit 15. The infected person information acquisition unit 103 is an example of an infected person information acquisition means.

[0043] For example, when an infection occurs in a person with a certain infectious disease and the infected person is “person A”, the user of the information providing device 100 inputs infected person information indicating the infected person “person A” using the input unit 15, and the infected person information acquiring unit 103 acquires the infected person information indicating the infected person “person A”. Alternatively, the infected person information acquiring unit 103 may accept the input of the infected person information via a terminal device capable of communicating with the information providing device 100.

[0044] The providing unit 104 refers to the stored contact information 1062 to identify the contactor who has come into contact with the infected person related to the acquired infected person information and the positional relationship between the infected person and the contactor. Furthermore, the providing unit 104 identifies environmental information of the time when the contactor was present in the air-conditioned space 300 together with the infected person from the stored environmental information 1061. Then, the providing unit 104 provides the identification information of the identified contactor, information indicating the identified positional relationship, and the identified environmental information as secondary infection risk information. The secondary infection risk information indicates information regarding the risk of secondary infection for the contactor of the infected person. Furthermore, the providing unit 104 further provides the infection risk value calculated by the infection risk calculation unit 105 as the secondary infection risk information. The providing unit 104 is realized by the processor 11, the communication unit 14, and the output unit 16 working together. The providing unit 104 is an example of a providing means.

[0045] Specifically, when the infected person information is acquired, the providing unit 104 searches the contact information 1062 stored in the storage unit 106 to identify contact persons. For example, when the infected person information indicating an infected person "person A" is acquired, the providing unit 104 refers to the contact information in Fig. 5 and identifies contact persons who have come into contact with the infected person "person A" as "person B", "person C", "person D", "person E", .... The providing unit 104 also identifies a positional relationship indicating that the contact persons were in the "upwind", "downwind", or "other" position of the infected person "person A".

[0046] Next, the providing unit 104 obtains the time when the infected person and the contact person came into contact from the contact information 1062, and searches the environmental information 1061 stored in the memory unit 106 to identify the environmental information at the time of contact. For example, if the time when the infected person "person A" came into contact with the contact person "person B" is obtained as "September 14, 2020, 9:00:00", "September 14, 2020, 9:07:30", "September 14, 2020, 9:15:00", ..., the environmental information in FIG. 4 is referenced to identify the airflow strength, temperature, humidity, CO2 concentration, and VOC concentration at the obtained time.

[0047] Next, the infection risk calculation unit 105 in Fig. 3 calculates an infection risk value indicating the risk of secondary infection of the contact person from the status information of the period when the contact person was present in the air-conditioned space 300 and the infection condition information. The infection risk value is calculated using a risk value included in the infection condition information, as will be described later. The infection risk calculation unit 105 is realized by the processor 11. The infection risk calculation unit 105 is an example of an infection risk calculation means.

[0048] Here, the infection condition information is information in which the conditions regarding the state of the air that may cause infection with an infectious disease are associated with a risk value indicating the risk of infection. For example, the infection condition information is information in which the activation conditions of pathogens in the air are associated with a risk value. The higher the risk value, the higher the risk of infection; for example, the closer the risk value is to the pathogen activation condition, the higher the value assigned. The infection condition information is stored in the memory unit 106 for each type of infectious disease pathogen.

[0049] An example of infection condition information is shown in Fig. 6. The infection condition information in Fig. 6 indicates risk values ​​for activation conditions of pathogen X, and indicates the air conditions at which pathogen X activates by temperature and humidity. In the infection condition information in Fig. 6, risk values ​​are associated with combinations of air temperature and humidity. For example, if pathogen X activates at a temperature of "less than 23°C" and humidity of "less than 50%, "the closer the combination of temperature and humidity is to these conditions, the greater the risk value assigned.

[0050] The infection risk calculation unit 105 refers to the infection condition information and calculates a risk value from the state information included in the environmental information specified by the providing unit 104. For example, when the temperature is calculated to be "20°C" and the humidity is calculated to be "58%" on "September 14, 2020, 9:00:00," the infection risk calculation unit 105 refers to the infection condition information in FIG. 6 and calculates the risk value to be "1."

[0051] Here, the infection risk calculation unit 105 corrects the risk value based on whether or not the air conditioned space is ventilated and whether or not the infected person is wearing a mask.

[0052] In general, when the air-conditioned space 300 is ventilated, the infection risk is reduced. Therefore, when the air-conditioned space 300 is ventilated, the infection risk calculation unit 105 corrects the risk value calculated from the state information to decrease it. Here, the information for determining whether the air-conditioned space is ventilated is information on the concentration of carbon dioxide detected by the CO2 concentration sensor 205 and information on the concentration of volatile organic compounds detected by the VOC concentration sensor 206. For example, when the concentration of carbon dioxide detected by the CO2 concentration sensor 205 is lower than a predetermined first concentration, or when the concentration of volatile organic compounds detected by the VOC concentration sensor 206 is lower than a predetermined second concentration, it is considered that ventilation is present in the air-conditioned space 300. The first concentration and the second concentration can be arbitrarily set by the user of the information providing device 100 based on the number of people present in the air-conditioned space 300, the size of the air-conditioned space 300, and the like.

[0053] For example, the infection risk calculation unit 105 refers to the contact information in Fig. 4 to determine whether ventilation was performed at "9:00:00 on September 14, 2020," the time when the infected person "person A" came into contact with the contact person "person B." If the infection risk calculation unit 105 determines that the concentration detected by the CO2 concentration sensor 205 at this time is lower than the first concentration, or the concentration detected by the VOC concentration sensor 206 is lower than the second concentration, it adds, for example, a predetermined first correction value "-0.1" to the risk value "1," thereby correcting the risk value to "0.9."

[0054] Generally, when an infected person wears a mask, the risk of infection is reduced. Therefore, the infection risk calculation unit 105 corrects the risk value to decrease.

[0055] For example, the infection risk calculation unit 105 refers to the contact information in Fig. 5 and determines whether the infected person "person A" was wearing a mask at the time "9:00:00 on September 14, 2020" when the infected person "person A" came into contact with the contact person "person B". Since the infected person "person A" was wearing a mask at this time, the infection risk calculation unit 105 adds, for example, a predetermined second correction value "-0.2" to the corrected risk value "0.9" to correct the risk value to "0.7".

[0056] The predetermined first and second correction values ​​can be arbitrarily set by the user of the information providing device 100. The correction may be performed based on only one of the information on the presence or absence of a mask and the presence or absence of ventilation.

[0057] The infection risk calculation unit 105 calculates a risk value for each time when it is determined from the contact information that the infected person and the contact person have come into contact. The infection risk calculation unit 105 regards the time when the risk value is equal to or greater than a predetermined risk threshold as the contact time when the infected person and the contact person have come into contact, and accumulates this contact time for each contact person. Then, the infection risk calculation unit 105 calculates the infection risk value based on the accumulated time. Specifically, the infection risk calculation unit 105 calculates an infection risk value indicating that the greater the accumulated value of the contact time equal to or greater than the risk threshold, the higher the risk of secondary infection. For example, when the condition for the time to be determined as a close contact of an infected person of an infectious disease is "15 minutes," the infection risk value of a contact whose accumulated contact time is "15 minutes or more" is calculated as "high," the infection risk value of a contact whose accumulated contact time is "less than 15 minutes, 7 minutes 30 seconds or more" is calculated as "medium," and the infection risk value of a contact whose accumulated contact time is "less than 7 minutes 30 seconds" is calculated as "low."

[0058] The providing unit 104 provides information on the identified contact person, environmental information for the period when the contact person was present in the air-conditioned space together with the infected person, information on the identified location relationship, and the infection risk value calculated by the infection risk calculation unit 105 as secondary infection risk information.

[0059] An example of secondary infection risk information is shown in FIG. 7. The secondary infection risk information in FIG. 7 is information on the risk of secondary infection of a person determined to have come into contact with an infected person "person A". The secondary infection risk information includes, in association with each other, identification information of the contact, environmental information at the time when the contact came into contact with the infected person, the positional relationship between the contact and the infected person, and an infection risk value. The first row of the table in FIG. 7 indicates that, at the time when the contact "person B" came into contact with the infected person "person A", the air conditioner 200 was operating with the airflow strength set to "high", the temperature of the air-conditioned space 300 was "20°C", the humidity was "48%, the CO2 concentration was "1200 ppm", and the VOC concentration was "0.03 ppm", the contact "person B" was located downwind of the infected person "person A", and the infection risk value was "high". Each value of the environmental information included in the secondary infection risk information is a value that represents the operating status and air condition of the air conditioner 200 during the accumulated contact time, such as the average, median, or mode of the accumulated contact time.

[0060] The providing unit 104 displays the secondary infection risk information in Fig. 7 on the display of the information providing device 100, for example. Alternatively, the providing unit 104 may transmit the secondary infection risk information in Fig. 7 to a terminal device capable of communicating with the information providing device 100.

[0061] 3 stores environmental information 1061, contact information 1062, and infection condition information 1065. The storage unit 106 is realized by the auxiliary storage unit 13. Note that the storage unit 106 is an example of a storage means.

[0062] Next, the process executed by the information providing device 100 according to the present embodiment will be described with reference to the flowcharts of Fig. 8 to Fig. 10. First, the contact information generating process executed by the contact information generating unit 102 of the information providing device 100 will be described with reference to the flowchart of Fig. 8.

[0063] The contact information generating unit 102 judges whether or not the first period has elapsed (step S101). If the contact information generating unit 102 judges that the first period has elapsed (step S101; YES), the contact information generating unit 102 acquires an image from the camera 203 (step S102). On the other hand, if the contact information generating unit 102 judges that the first period has not elapsed (step S101; NO), the contact information generating unit 102 waits as it is.

[0064] The contact information generating unit 102 analyzes the image acquired from the camera 203 and extracts people present in the air conditioned space 300 (step S103). Then, the contact information generating unit 102 determines whether or not multiple people are present in the air conditioned space 300 (step S104).

[0065] When the contact information generating unit 102 determines that multiple people are present in the air conditioned space 300 (step S104; YES), it identifies the people present in the air conditioned space 300 and determines the distance and positional relationship between the people (step S105). On the other hand, when the contact information generating unit 102 determines that multiple people are not present in the air conditioned space 300 (step S104; NO), it ends the contact information generation process.

[0066] The contact information generating unit 102 judges whether or not a contact person has been identified (step S106). Specifically, the contact information generating unit 102 judges whether or not people present in the air conditioned space 300 are located close to each other for a certain period of time, and identifies people who are determined to be located close to each other for a certain period of time as contact people. When the contact information generating unit 102 judges that a contact person has been identified (step S106; YES), it generates contact information for each contact person and stores it in the storage unit 106 (step S107). On the other hand, when the contact information generating unit 102 judges that a contact person has not been identified (step S106; NO), it ends the contact information generation process.

[0067] Next, the information providing process executed by the information providing device 100 will be described with reference to the flowchart of FIG.

[0068] The infected person information acquisition unit 103 acquires infected person information indicating a person infected with an infectious disease (step S201). The providing unit 104 searches for contact information stored in the memory unit 106 and identifies a contact of the infected person related to the acquired infected person information (step S202). The providing unit 104 then obtains the time when the infected person and the contact person came into contact from the contact information, and searches for environmental information stored in the memory unit 106 to identify environmental information for the time of contact (step S203).

[0069] Next, the infection risk calculation unit 105 calculates an infection risk value indicating the risk of secondary infection from the status information of the period when the contact person was present in the air-conditioned space 300 and the infection condition information (step S204). The infection risk value calculation process executed by the infection risk calculation unit 105 will be described with reference to the flowchart in FIG.

[0070] The infection risk calculation unit 105 calculates a risk value from the infection condition information and the state information included in the environmental information specified by the provision unit 104 for each time when it is determined that an infected person and a contact person have come into contact (step S301). Next, the infection risk calculation unit 105 corrects the risk value based on whether the infected person is wearing a mask, the CO2 concentration value, and the VOC concentration value (step S302). The infection risk calculation unit 105 accumulates the contact time during which the risk value is equal to or greater than the risk threshold (step S303). Then, the infection risk calculation unit 105 calculates the infection risk value based on the accumulated contact time (step S304).

[0071] Returning to step S205 in Figure 9, the providing unit 104 provides information on the identified contact person, environmental information for the period when the contact person was in the air-conditioned space, locational relationship information, and the infection risk value calculated by the infection risk calculation unit 105 as secondary infection risk information (step S205).

[0072] According to this embodiment, it is possible to provide information useful for determining the risk of secondary infection, including information on the contacts of an infected person, information on the air condition in the air-conditioned space, information on the operating status of the air conditioner, and information on the positional relationship between the infected person and the contacts, and it is possible to provide information useful for determining the risk of secondary infection. This makes it possible to accurately determine the risk of secondary infection by considering not only the presence or absence of contact based on distance, but also the air condition in the air-conditioned space, the operating status of the air conditioner, and the positional relationship between the infected person and the contacts, and to prevent the spread of infection by quickly isolating those who are at risk of secondary infection.

[0073] Furthermore, according to this embodiment, it is possible to provide an infection risk value indicating the risk of secondary infection for a contact person, which is calculated based on the air condition of the air-conditioned space. Furthermore, it is possible to provide an infection risk value taking into account whether or not the infected person is wearing a mask and whether or not the air-conditioned space is ventilated. This makes it possible to more accurately indicate the risk of secondary infection.

[0074] Furthermore, according to the present embodiment, it is possible to identify the person in contact with the infected person by taking into consideration the positional relationship between the infected person and the person in contact with the infected person, thereby making it possible to more accurately identify the person at risk of secondary infection.

[0075] (Embodiment 2) The information providing system 1 according to the second embodiment is a system that updates infection condition information based on secondary infection information.

[0076] 11, the information providing system 1 according to the second embodiment is obtained by adding a server device 600 to the information providing system 1 of the first embodiment. The following describes the differences from the information providing system 1 of the first embodiment.

[0077] The infected person information acquisition unit 103 acquires secondary infected person information indicating secondary infected persons of an infectious disease. For example, when an infected person of a certain infectious disease occurs and the infected person is "person A" and the secondary infected persons are "person B" and "person D", the user of the information providing device 100 inputs secondary infected person information indicating the secondary infected persons "person B" and "person D" using the input unit 15, and the infected person information acquisition unit 103 acquires secondary infected person information indicating the secondary infected persons "person B" and "person D". Hereinafter, the secondary infected persons of the infected person "person A" are referred to as "person B" and "person D", and the contact persons who are not secondary infected persons are referred to as "person C" and "person E".

[0078] The contact information generating unit 102 generates secondary infection information including status information of a period when a secondary infection person was present in the air-conditioned space 300 together with an infected person, and status information of a period when a contact of the infected person, other than the secondary infection person, was present in the air-conditioned space 300 together with the infected person. In other words, the secondary infection information is information indicating a situation in which a secondary infection has occurred and a situation in which it has not occurred. The secondary infection information includes information indicating whether or not a secondary infection has occurred, status information, and information on the cumulative contact time between the infected person and contacts including the secondary infection person.

[0079] For example, when the infected person information acquisition unit 103 acquires secondary infection person information indicating a secondary infection person "person B" as a secondary infection person of an infected person "person A," the contact information generation unit 102 refers to the contact information 1062 to identify the time when the secondary infection person "person B" came into contact with the infected person "person A," and refers to the environmental information 1061 to obtain the temperature and humidity at the identified time. Then, the contact information generation unit 102 obtains the cumulative contact time between the secondary infection person "person B" and the infected person "person A" in the air-conditioned space 300 at the obtained temperature and humidity. Similarly, the contact information generation unit 102 obtains the temperature and humidity at the time of contact and the cumulative contact time for contact persons of the infected person "person A," who are not secondary infection persons.

[0080] FIG. 12 shows an example of secondary infection information. The secondary infection information in FIG. 12 shows secondary infection information about an infected person "person A". The secondary infection information includes information indicating the presence or absence of secondary infection, status information, and accumulated contact time, which are associated with each other. The status information and contact time information associated with the records "Yes", "Yes", "No", and "No" in the column of the presence or absence of secondary infection in FIG. 12 are information about the secondary infections "person B", "person D", and the contacts "person C", and "person E", respectively. The secondary infection information does not include information that identifies individuals. The first row of the table in FIG. 12 shows that the temperature of the air-conditioned space 300 where the secondary infection occurred was "20°C", the humidity was "58%, and the accumulated contact time between the infected person and the secondary infection in the air-conditioned space 300 with such air conditions was "15 minutes".

[0081] The providing unit 104 transmits the generated secondary infection information to the server device 600.

[0082] The server device 600 accumulates the secondary infection information received from the information providing device 100. The server device 600 accumulates the secondary infection information received from various information providing devices 100, and can accumulate the situations in which secondary infection has occurred and the situations in which secondary infection has not occurred as big data. Based on the accumulated secondary infection information, the infection condition information is updated according to an instruction from a user of the server device 600 or at a predetermined timing. The infection condition information is updated by a known method such as machine learning. For example, the server device 600 identifies the air condition in which secondary infection has actually occurred and the air condition in which secondary infection has not occurred based on the accumulated secondary infection information, and updates the risk value of the infection condition information based on this. That is, the server device 600 uses the accumulated secondary infection information to update the infection condition information to one that more accurately indicates the risk of infection.

[0083] When the server device 600 updates the infection condition information, it transmits the updated infection condition information to the information providing device 100 .

[0084] The providing unit 104 receives the updated infection condition information from the server device 600 and stores the updated infection condition information in the storage unit 106 .

[0085] The infection risk calculation unit 105 calculates an infection risk value using the updated infection condition information.

[0086] Next, the information providing process executed by the information providing device 100 in this embodiment will be described with reference to the flowchart in Fig. 13. Step S401 in the flowchart in Fig. 13 shows the processes in steps S201 to S205 in Fig. 9.

[0087] When the process of step S401 is completed, the infected person information acquisition unit 103 judges whether or not a certain period has elapsed (step S402). Hereinafter, this certain period will be referred to as a second period. When the infected person information acquisition unit 103 judges that the second period has elapsed (step S402; YES), it requests input of secondary infection information indicating secondary infections of an infectious disease (step S403). Hereinafter, the input request is made by displaying an input image for inputting secondary infection information on the display of the information providing device 100. Alternatively, a message requesting the input request may be sent to a pre-registered email address of the user, or a notification may be sent to a smartphone app. On the other hand, when the infected person information acquisition unit 103 judges that the second period has not elapsed (step S402; NO), it waits as it is.

[0088] Next, the infected person information acquisition unit 103 judges whether or not the input of secondary infection information has been received (step S404). If the infected person information acquisition unit 103 judges that the input of secondary infection information has been received (step S404; YES), the contact information generation unit 102 generates secondary infection information (step S405). On the other hand, if the infected person information acquisition unit 103 judges that the input of secondary infection information has not been received (step S404; NO), the information provision process is terminated. The provision unit 104 transmits the generated secondary infection information to the server device 600 (step S406).

[0089] According to this embodiment, information on the air condition in air-conditioned spaces where secondary infections occur and where secondary infections do not occur can be accumulated as big data. As a result, even if the properties of the pathogen that causes an infectious disease have not been elucidated, it is possible to know the tendency of infectious disease outbreaks by analyzing the big data. Then, by reflecting the tendency obtained by the analysis in the calculation of the infection risk value, more accurate secondary infection risk information can be provided.

[0090] (Modification) Although the embodiment of the present disclosure has been described above, various modifications and applications are possible in implementing the present disclosure.

[0091] In the above embodiment, a system controller having a function of controlling the air conditioner 200 has been given as an example of the information providing device 100, but the information providing device 100 is not limited to this. The information providing device 100 may be realized by, for example, a personal computer, a smartphone, a Home Energy Management System (HEMS), an AI speaker, or the like.

[0092] In the above embodiment, the camera 203, the temperature and humidity sensor 204, the CO2 concentration sensor 205, and the VOC concentration sensor 206 are communicatively connected to the indoor unit 201, and the acquired information is transmitted to the information providing device 100 via the indoor unit 201; however, this is not limited thereto. The camera 203 and the various sensors may each be communicatively connected to the information providing device 100, and the acquired information may be transmitted directly to the information providing device 100.

[0093] In the above embodiment, the position information of the seat is associated with the identification information of the person to whom the seat is assigned, but this is not limited thereto. For example, face recognition technology may be used to identify people present in the air-conditioned space 300, and the distance between the identified people may be obtained. Also, each person present in the air-conditioned space 300 may carry a terminal device, and the terminal device may transmit position information and identification information of the holder to the information providing device 100 via the network 500. Alternatively, an application for contact confirmation may be installed in the indoor unit 201 and the terminal device, and the indoor unit 201 may obtain position information of the terminal device and identification information of the holder using short-range wireless communication, and transmit the obtained position information and identification information to the information providing device 100. The information providing device 100 may identify people present in the air-conditioned space 300 based on the received position information and identification information, and obtain the distance between the identified people.

[0094] In the above embodiment, the information for determining whether or not ventilation of the air conditioned space 300 is performed is information indicating the concentration of carbon dioxide and the concentration of volatile organic compounds, but is not limited thereto. For example, a ventilation device may be installed in the air conditioned space 300, and the information providing device 100 may be communicably connected to the ventilation device and acquire operation information of the ventilation device. The information providing device 100 may use the acquired operation information of the ventilation device as information for determining whether or not ventilation of the air conditioned space 300 is performed, and may determine whether or not ventilation of the air conditioned space 300 is performed.

[0095] In the above embodiment, the infection risk calculation unit 105 corrects the risk value based on the information on whether the infected person is wearing a mask, but the use of the information on whether the infected person is wearing a mask is not limited to this. For example, the contact information generation unit 102 may determine that the infected person has no contacts if the infected person is wearing a mask.

[0096] In addition, by applying an operating program that specifies the operation of the information providing device 100 according to the above embodiment to an existing personal computer or information terminal device, it is also possible to cause the personal computer or information terminal device to function as the information providing device 100 according to the embodiment.

[0097] Furthermore, the method of distribution of such a program is arbitrary; for example, the program may be stored on a computer-readable recording medium such as a CD-ROM (Compact Disk Read-Only Memory), a DVD (Digital Versatile Disk), or a memory card and distributed, or the program may be distributed via a communications network such as the Internet.

[0098] Various embodiments and modifications of the present disclosure are possible without departing from the broad spirit and scope of the present disclosure. The above-described embodiments are for explaining the present disclosure and do not limit the scope of the present disclosure. In other words, the scope of the present disclosure is indicated by the claims, not the embodiments. Various modifications made within the scope of the claims and the scope of the disclosure equivalent thereto are considered to be within the scope of the present disclosure. [Industrial Applicability]

[0099] The present disclosure can provide an information providing device, an information providing system, a control method, and a program capable of providing information useful for determining the risk of secondary infection in an air-conditioned space. [Explanation of symbols]

[0100] 1 information providing system, 11 processor, 12 main memory unit, 13 auxiliary memory unit, 14 communication unit, 15 input unit, 16 output unit, 17 RTC, 18 bus, 100 information providing device, 101 environmental information acquisition unit, 102 contact information generation unit, 103 infected person information acquisition unit, 104 provision unit, 105 infection risk calculation unit, 106 memory unit, 1061 environmental information, 1062 contact information, 1063 operation information, 1064 status information, 1065 infection condition information, 200 air conditioner, 300 air conditioned space, 400 person, 500 network, 600 server device.

Claims

1. An environmental information acquisition means for acquiring environmental information including operating information indicating an operating status of an air conditioner that controls the air conditioning of a target space for air conditioning and status information indicating an air condition of the target space for air conditioning; a contact information generating means for acquiring an image of the air-conditioned space, identifying people present in the air-conditioned space from the acquired image, determining the distance and positional relationship between the identified people, and generating contact information indicating the identified people, whether or not there is contact between the people, and the positional relationship between the people; A storage means for storing the acquired environmental information and the generated contact information; An infected person information acquisition means for acquiring infected person information indicating a person infected with an infectious disease; a provision means for referring to the stored contact information, identifying a contact person who has come into contact with an infected person related to the acquired infected person information and a positional relationship between the infected person and the contact person, identifying environmental information from the stored environmental information for a period when the contact person was present in the air-conditioned space together with the infected person, and providing identification information for identifying the contact person, information indicating the identified positional relationship, and the identified environmental information as secondary infection risk information; The operating information includes information indicating the strength of airflow of the air conditioner, The status information includes information indicating a carbon dioxide concentration and a volatile organic compound concentration in the air conditioned space, The information indicating the strength of the airflow is used to determine whether or not the person is a contact person. The information indicating the concentration of carbon dioxide and the concentration of volatile organic compounds is used to determine whether or not ventilation is required for the air-conditioned space. Information providing device.

2. The storage means further stores infection condition information in which conditions regarding air conditions that may cause infection with the infectious disease are associated with risk values ​​indicating the risk of infection; An infection risk calculation means for calculating an infection risk value indicating a risk of secondary infection of the contact person from status information relating to a period during which the contact person was present in the air-conditioned space together with the infected person and the infection condition information, The providing means further provides the infection risk value as the secondary infection risk information.

2. The information providing device according to claim 1.

3. the infection condition information is information in which an activation condition of the pathogen of the infectious disease in the air is associated with the risk value; the infection risk calculation means, by referring to the infection condition information, calculates an infection risk value indicating that the risk of secondary infection is higher as the air condition indicated by the status information relating to the period when the contact person was present in the air-conditioned space together with the infected person approaches the activation condition; 3. The information providing device according to claim 2.

4. The status information further includes information on temperature and humidity of the air conditioned space, The activation conditions are dictated by the temperature and humidity of the air, The infection risk calculation means calculates an infection risk value indicating a higher risk of secondary infection as the temperature and humidity values ​​of the air-conditioned space during the time when the contact person was present in the air-conditioned space together with the infected person approach the temperature and humidity values ​​related to the activation condition.

4. The information providing device according to claim 3.

5. The status information further includes information for determining whether or not ventilation is present in the air conditioned space, When the infection risk calculation means determines that ventilation was present in the air-conditioned space during the period when the contact person was present in the air-conditioned space together with the infected person based on the information for determining the presence or absence of ventilation, the infection risk calculation means corrects the infection risk value to decrease.

5. The information providing device according to claim 4.

6. The information for determining whether or not ventilation is present in the air conditioned space is information indicating a carbon dioxide concentration in the air conditioned space related to state information included in the environmental information, The infection risk calculation means determines that ventilation is being performed in the air conditioned space when the concentration of the carbon dioxide is lower than a predetermined first concentration.

6. An information providing device according to claim 5.

7. the information for determining whether or not ventilation is present in the air conditioned space is information indicating a concentration of volatile organic compounds in the air conditioned space related to state information included in the environmental information, The infection risk calculation means determines that ventilation is being performed in the air conditioned space when the concentration of the volatile organic compounds is lower than a predetermined second concentration.

7. The information providing device according to claim 5 or 6.

8. The contact information generating means determines whether or not a person in the air conditioned space is wearing a mask from the image of the air conditioned space, When the infection risk calculation means determines that the infected person was wearing a mask during the time when the contact person was present in the air-conditioned space together with the infected person, the infection risk calculation means corrects the infection risk value to be reduced. The information providing device according to any one of claims 3 to 7.

9. The contact information generating means If the distance between the people is equal to or less than a predetermined distance threshold, it is determined that the people have come into contact with each other; Even if the distance between the people exceeds the predetermined distance threshold, if one of the people is downwind of the other, it is determined that the people have come into contact with each other.

9. An information providing device according to claim 1.

10. An environmental information acquisition means for acquiring environmental information including operating information indicating an operating status of an air conditioner that controls the air conditioning of a target space for air conditioning and status information indicating an air condition of the target space for air conditioning; a contact information generating means for acquiring an image of the air-conditioned space, identifying people present in the air-conditioned space from the acquired image, determining the distance and positional relationship between the identified people, and generating contact information indicating the identified people, whether or not there is contact between the people, and the positional relationship between the people; A storage means for storing the acquired environmental information, the generated contact information, infection condition information in which conditions regarding air conditions that may cause infection with an infectious disease and a risk value indicating the risk of infection are associated with each other; An infected person information acquisition means for acquiring infected person information indicating a person infected with the infectious disease; a provision means for referring to the stored contact information, identifying a contact person who has come into contact with an infected person related to the acquired infected person information and a positional relationship between the infected person and the contact person, identifying environmental information from the stored environmental information for a period when the contact person was present in the air-conditioned space together with the infected person, and providing identification information for identifying the contact person, information indicating the identified positional relationship, and the identified environmental information as secondary infection risk information; an infection risk calculation means for calculating an infection risk value indicating a risk of secondary infection of the contact person from status information relating to a period during which the contact person was present in the air-conditioned space together with the infected person and the infection condition information; The providing means further provides the infection risk value as the secondary infection risk information, The infected person information acquisition means further acquires secondary infection information indicating a secondary infection of the infectious disease, the contact information generating means generates secondary infection information including status information relating to a period when the secondary infection person was present in the air-conditioned space together with the infected person, and status information relating to a period when a contact of the infected person, other than the secondary infection person, was present in the air-conditioned space together with the infected person; The providing means transmits the secondary infection information, receives infection condition information updated based on the transmitted secondary infection information, and stores the received infection condition information in the storage means; The operating information includes information indicating the strength of airflow of the air conditioner, The status information includes information indicating a carbon dioxide concentration and a volatile organic compound concentration in the air conditioned space, The information indicating the strength of the airflow is used to determine whether or not the person is a contact person. The information indicating the concentration of carbon dioxide and the concentration of volatile organic compounds is used to determine whether or not ventilation is required for the air-conditioned space. Information provision system.

11. a contact information generating means for generating contact information indicating whether or not the identified people are in contact with each other and the positional relationship between the identified people, and storing the generated contact information in a storage means; The infected person information acquisition means acquires infected person information indicating persons infected with an infectious disease, The providing means refers to the contact information stored in the storage means, identifies a contact person who came into contact with the infected person related to the acquired infected person information and a positional relationship between the infected person and the contact person, and identifies environmental information stored in the storage means, including operating information indicating the operating status of an air conditioner that controls the air conditioning of the air-conditioned space and status information indicating the air condition of the air-conditioned space, for a period when the contact person was present in the air-conditioned space together with the infected person, and provides identification information for identifying the contact person, information indicating the specified positional relationship, and the specified environmental information as secondary infection risk information; The operating information includes information indicating the strength of airflow of the air conditioner, The status information includes information indicating a carbon dioxide concentration and a volatile organic compound concentration in the air conditioned space, The information indicating the strength of the airflow is used to determine whether or not the person is a contact person. The information indicating the concentration of carbon dioxide and the concentration of volatile organic compounds is used to determine whether or not ventilation is required for the air-conditioned space. Control methods.

12. Computer, An environmental information acquisition means for acquiring environmental information including operating information indicating an operating status of an air conditioner that controls the air conditioning of a space to be air conditioned and status information indicating an air condition of the space to be air conditioned; a contact information generating means for acquiring an image of the air-conditioned space, identifying people present in the air-conditioned space from the acquired image, determining the distance and positional relationship between the identified people, and generating contact information indicating the identified people, whether or not there is contact between the people, and the positional relationship between the people; a storage means for storing the acquired environmental information and the generated contact information; An infected person information acquisition means for acquiring infected person information indicating a person infected with an infectious disease; a provision means for referring to the stored contact information, identifying a contact person who has come into contact with an infected person related to the acquired infected person information and a positional relationship between the infected person and the contact person, identifying environmental information from the stored environmental information for a period when the contact person was present in the air-conditioned space together with the infected person, and providing identification information for identifying the contact person, information indicating the identified positional relationship, and the identified environmental information as secondary infection risk information; Functioning as a The operating information includes information indicating the strength of airflow of the air conditioner, The status information includes information indicating a carbon dioxide concentration and a volatile organic compound concentration in the air conditioned space, The information indicating the strength of the airflow is used to determine whether or not the person is a contact person. The information indicating the concentration of carbon dioxide and the concentration of volatile organic compounds is used to determine whether or not ventilation is required for the air-conditioned space. program.

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