Spatial environment improvement system, method, and program

Abstract

To provide a spatial environment improvement system, method, and program capable of improving an environment in a space according to a contamination state.SOLUTION: The spatial environment improvement system includes an environment measurement unit that measures a gaseous environment in the monitoring space, a person measurement unit that measures the presence of a person in the monitoring space, a space state calculation unit that calculates a contamination state of the monitoring space from gaseous environment data measured by the environment measurement unit and person data measured by the person measurement unit, and a space improvement control unit that controls an environment improvement unit that improves the contamination state in the monitoring space based on the contamination state calculated by the space state calculation unit.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a system, method and program for improving a spatial environment. [Background technology]

[0002] Systems for sterilizing and disinfecting spaces have been proposed. For example, Patent Document 1 discloses a space sterilization device that sterilizes a space by diffusing a germicide gasified by ultrasound. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2023-053928 Summary of the Invention [Problem to be solved by the invention]

[0004] However, with conventional space sterilization devices such as those shown in Patent Document 1, it takes time for the effects to become apparent after sterilization / disinfection begins. Also, when many people enter a space at once, the space becomes contaminated with dust and germs dropped by the people, carbon dioxide contained in their breath, moisture, etc., but when a space sterilization device is used to rapidly sterilize and disinfect the space, it involves processes such as dispersing a large amount of disinfectant into the space and rapidly ventilating the space, which may cause great stress to the people in the space.

[0005] The present invention has been made in consideration of the above circumstances, and aims to provide a space environment improvement system, method, and program that can improve the environment within a space depending on the level of contamination. [Means for solving the problem]

[0006] In order to achieve the above object, the spatial environment improving system according to the present invention comprises: In a space environment improvement system that monitors the pollution status of indoor monitoring spaces and improves the space environment, an environment measuring means for measuring the gaseous environment in the monitoring space; a presence detection means for detecting the presence of a person in the monitoring space; a space condition calculation unit that calculates the pollution condition of the monitoring space from the gaseous environment data measured by the environment measurement means and the human data measured by the human measurement means; a space improvement control unit that controls an environment improvement means for improving the contamination state in the monitoring space based on the contamination state calculated by the space state calculation unit; The present invention is characterized by comprising: [Effects of the Invention]

[0007] According to the present invention, the environment within a space can be improved depending on the contamination state. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a diagram showing an example of the configuration of a spatial environment improving system according to an embodiment of the present invention; [Figure 2] FIG. 2 is a diagram illustrating a configuration of a control unit of the control device according to the embodiment of the present invention. [Figure 3] FIG. 2 is a diagram illustrating an example of a hardware configuration of a control device according to the present embodiment. [Figure 4] 10 is an example of a notification screen displayed on the display device according to the embodiment of the present invention. [Figure 5] FIG. 3 is a diagram showing a table of a past performance database according to the embodiment of the present invention. [Figure 6] FIG. 6 is a diagram showing a graph of data from the past performance database shown in FIG. 5. [Figure 7] 4 is a flowchart showing a flow of an environment improvement process executed in the control device according to the embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0009] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings, in which the same or corresponding parts are designated by the same reference numerals.

[0010] The spatial environment improving system 100 according to an embodiment of the present invention has the function of calculating the pollution state within an indoor monitoring space 1 from measured gaseous environment data and human data, and improving the pollution state within the monitoring space 1 based on the calculated pollution state.

[0011] 1 is a diagram showing the configuration of a spatial environment improving system 100 including a control device 3. The spatial environment improving system 100 includes an environment improvement device 11, an environment measurement sensor 12, and an occupancy measurement sensor 13 arranged in a monitored space 1, a notification system 2, and a control device 3. The environment improvement device 11, the environment measurement sensor 12, and the occupancy measurement sensor 13 arranged in the monitored space 1, the notification system 2, and the control device 3 are connected via a wired or wireless network.

[0012] The monitoring space 1 is indoors, and in this embodiment, a floor in a hospital will be used as an example for explanation below. The monitoring space 1 includes an environment improvement device 11 that improves the environmental condition within the space, an environment measurement sensor 12 that measures the environmental condition within the space, and a human measurement sensor 13 that measures the number of people present within the space. The environment improvement device 11 is an environment improvement means for improving the environmental condition within the space, and includes a sterilization device 111, an air conditioning device 112, a DAC (Direct Air Capture) device 113, and a ventilation device 114.

[0013] The sterilization device 111 is a device for sterilizing the space using, for example, chemicals, metal ions, etc. The air conditioning device 112 is a device that conditions the air in the space, including heating and cooling functions. The DAC device 113 is a device that can separate and collect carbon dioxide (hereinafter referred to as CO2) directly from the air in the space. The ventilation device 114 is a device that ventilates the space, such as a circulator.

[0014] The environment measurement sensor 12 is an environment measurement means for measuring the gaseous environment in a space, and includes a CO2 sensor 121, a temperature sensor 122, a humidity sensor 123, an air pressure sensor 124, and a TVOC (Total Volatile Organic Compounds) sensor 125. The CO2 sensor 121 measures the concentration of CO2 contained in the air in the space. The temperature sensor 122 measures the temperature in the space. The humidity sensor 123 measures the humidity contained in the air in the space. The air pressure sensor 124 measures the air pressure in the space. The TVOC sensor 125 measures the total amount of volatile organic compounds contained in the air in the space.

[0015] The human measurement sensor 13 is a means for measuring the number and positions of people present in a space. For example, the human measurement sensor 13 may be a camera capable of detecting people from still images and video information captured in a space, or a LiDAR (Light Detection and Ranging) device that detects the distance to an object and its shape based on information on the reflected light of an irradiated laser beam.

[0016] The notification system 2 is a system for notifying a user of the current environmental state within a space, and includes a display device 21 as a display means. The display device 21 displays the current environmental state within the space. The notification system 2 can be configured using a small portable device such as a tablet or smartphone.

[0017] The control device 3 is, for example, a server that functions as a cloud, and includes a communication unit 31, a storage unit 32, and a control unit 33. The communication unit 31 communicates with the environment improvement device 11, the environment measurement sensor 12, and the human measurement sensor 13 in the monitored space 1, and with the notification system 2. The storage unit 32 stores various data and programs used by the control unit 33 of the control device 3.

[0018] The control unit 33 controls the environment improvement device 11 in accordance with various data acquired from the environment measurement sensor 12 and the occupancy measurement sensor 13 in the monitored space 1, thereby improving the environmental condition within the space. The control unit 33 also causes the display device 21 of the notification system 2 to display the environmental condition within the space. In detail, as shown in FIG. 2 , the control unit 33 includes a data acquisition unit 331, a space condition calculation unit 332, a space change estimation unit 333, a space improvement control unit 334, a replacement time management unit 335, and a display control unit 336.

[0019] 1 . The space state calculation unit 332 calculates the pollution state within the monitoring space 1 from the gaseous environment data measured by the environment measurement sensor 12 and the occupancy data measured by the occupancy measurement sensor 13. The space change estimation unit 333 estimates changes in the pollution state within the monitoring space 1 from past data on the pollution state within the monitoring space 1 (data by day of the week and time period) based on the pollution state within the monitoring space 1 calculated by the space state calculation unit 332.

[0020] The space improvement control unit 334 controls the environment improvement device 11 shown in Fig. 1 based on the environmental state calculated by the space state calculation unit 332 and the environmental state estimated by the space change estimation unit 333. The replacement time management unit 335 manages the replacement times of various catalysts for sterilization, disinfection, etc. and decontamination means such as filters for air purification used in the environment improvement device 11. The display control unit 336 controls the display content of the display device 21 of the notification system 2 shown in Fig. 1.

[0021] Each function of the control unit 33 of the control device 3 shown in Fig. 2 is realized by executing a program stored in the storage unit 32 of the control device 3 shown in Fig. 1. The hardware configuration of the control device 3 for executing the program will be described below with reference to Fig. 3.

[0022] The control device 3 includes a communication device 3301, a storage device 3302, a memory 3303, and a processor 3304. The communication device 3301, the storage device 3302, the memory 3303, and the processor 3304 are connected to each other via a bus 3305.

[0023] The communication device 3301 communicates with the environment improvement device 11, the environment measurement sensor 12, and the occupancy measurement sensor 13 in the monitored space 1, and with the notification system 2 via a network. The communication device 3301 can be configured using various devices equipped with a communication method that can connect to a network, such as a wired or wireless LAN (Local Area Network). The storage device 3302 is a device that stores various programs executed by the processor 3304 and various data acquired by the communication device 3301 from the environment measurement sensor 12 and the occupancy measurement sensor 13. The storage device 3302 can be configured using storage devices such as an HDD (Hard Disk Drive) or SSD (Solid State Drive).

[0024] The memory 3303 is a storage element for loading various programs stored in the storage device 3302. The memory 3303 can be configured using, for example, a storage element and a storage medium such as a RAM (Random Access Memory) or a volatile or non-volatile semiconductor memory such as a flash memory. The processor 3304 reads out the various programs stored in the storage device 3302, loads them into the memory 3303, and executes them. The processor 3304 can be configured using, for example, a processing device such as a CPU (Central Processing Unit) or an MPU (Micro-Processing Unit).

[0025] Next, an example of the configuration of the notification screen 211 displayed on the display device 21 of the notification system 2 is shown in FIG. 4. The notification screen 211 displays the current environmental state of the monitoring space 1. The notification screen 211 includes a date and time display section 212 and an information presentation section 213. The date and time display section 212 displays the current date and time of the monitoring space 1. In FIG. 4, for example, "7:15 AM, Month, Day, Month, 2024 (Monday)" is displayed.

[0026] The information presentation unit 213 includes a location selection unit 2131, an environmental state presentation unit 2132, and a video display unit 2133. The location selection unit 2131 displays buttons, selection items, and the like for selecting a location for which the user wants to check the current environmental state from within the monitoring space 1 whose environmental state is to be managed. For example, in FIG. 4 , the location selection unit 2131 displays a facility selection button 2131a, a floor selection button 2131b, a location selection button 2131c, and a change button 2131d. The facility selection button 2131a, the floor selection button 2131b, and the location selection button 2131c present options for the environmental state to be checked in a pull-down format. The change button 2131d confirms the check target selected with the facility selection button 2131a, the floor selection button 2131b, and the location selection button 2131c, and changes the content presented on the environmental state presentation unit 2132 and the video display unit 2133.

[0027] 4, for example, facility selection button 2131a selects "Facility: ●× Hospital," floor selection button 2131b selects "Floor: 1st Floor," and location selection button 2131c selects "Location: Rehabilitation Room." When change button 2131d is pressed in this state, environmental state presentation section 2132 displays the environmental states of "Facility: ●× Hospital," "Floor: 1st Floor," and "Location: Rehabilitation Room," and video display section 2133 displays the current video of "Rehabilitation Room."

[0028] 4, the environmental state display unit 2132 displays the current number of people in the "rehabilitation room" as "11 people," the congestion level as "25%," and the CO2 concentration as "8%." The video display unit 2133 displays a video of the "rehabilitation room" including people 2133a to 2133f.

[0029] The current environmental conditions of the monitored space 1 are compiled by date and time for each facility and stored as a past performance database 321 in the storage unit 32 of the control device 3 shown in Fig. 1. Fig. 5 is a table of the past performance database 321. The past performance database 321 includes items such as date, location, time period, number of people, congestion level (%), CO2 concentration (%), etc., and stores the date and location items in association with items such as time period, number of people, congestion level (%), CO2 concentration (%), etc.

[0030] For example, the table of the past performance database 321 shown in Fig. 5 is a table that stores data for "facility: ●× Hospital," and stores a date "Monday, ● / ×, 2024" and a location "1st floor rehabilitation room" in association with a time period "0:00-1:59," a number of people "2," a congestion level (%) "4.5," a CO2 concentration (%) "1.5," etc. Note that while Fig. 5 shows the time period divided into two-hour intervals, the intervals may be any interval, such as 30 minutes or one hour.

[0031] Figure 6 shows a graph of data from the past performance database 321 for the date "Monday, ● / × 2024" and the location "1st floor rehabilitation room." In this graph, the horizontal axis represents "time (t)" and the vertical axis represents "number of people" or "%." In the graph, the number of people in monitoring space 1 is shown with a solid line, the congestion level is shown with a two-dot chain line, and the CO2 concentration is shown with a single-dot chain line.

[0032] From the graph, it can be seen that the degree of congestion and CO2 concentration rise or fall in proportion to the number of people in the monitoring space 1. As the degree of congestion rises, the amount of dust, germs, moisture, etc. dropped by people increases in the monitoring space 1. Furthermore, the amount of CO2 contained in people's breath increases, causing the CO2 concentration to rise, which dilutes the oxygen in the monitoring space 1 and makes it difficult for the user to breathe. In this case, the control unit 33 of the control device 3 shown in FIG. 1 operates the environment improvement device 11 to improve the environmental conditions in the space.

[0033] However, when using the environment improvement device 11 to remove dust, germs, moisture, CO2 contained in the breath of people in a space, and other substances, strong ventilation and powerful sterilization and disinfection are required to do so in a short period of time. In particular, when disinfecting and sterilizing to reduce germs, there is a time lag, as it usually takes about 3 to 4 hours for the effect to be seen. Therefore, if you want to see results in a short period of time, you will need to use fairly powerful sterilization and disinfection.

[0034] However, strong ventilation and powerful sterilization and disinfection also have an impact on people in monitoring space 1. For example, strong ventilation can make people feel cold, and strong sterilization and disinfection can cause a large amount of chemicals to spread throughout the space, causing stress.

[0035] Therefore, in this embodiment, the environmental improvement device 11 is operated in advance based on the past number of people, congestion level, CO2 concentration, etc., for the monitored space 1 whose environmental condition is to be improved over time, so that it will be effective when improvement of the environmental condition is necessary.

[0036] For example, in the graph shown in FIG. 6, the degree of congestion in the monitoring space 1 is used as a criterion for the state of contamination to determine whether or not the environment improvement device 11 needs to be operated.

[0037] The vertical axis of Figure 6 shows the threshold value Th1 as a dotted and dashed line. The graph of the dotted and dashed line showing the degree of congestion in the monitoring space 1 at time t1 is below the threshold value Th1. Since it usually takes three to four hours to disinfect and sterilize a space using the environment improvement device 11, for example, the following will look at the change in the degree of congestion after three hours.

[0038] If time t1 is 2:00, then three hours later at 5:00, the congestion level is below threshold Th1. In this case, the control unit 33 of the control device 3 does not turn on the environment improvement device 11. Next, at time t2, the graph of the two-dot chain line showing the congestion level in the monitoring space 1 is below threshold Th1. If time t2 is 7:00, then three hours later at 10:00, the congestion level exceeds threshold Th1. In this case, the control unit 33 of the control device 3 turns on and operates the environment improvement device 11.

[0039] At time t3, the dashed-two-dot line graph showing the degree of congestion in the monitoring space 1 exceeds the threshold value Th1. If time t3 is 1:00 PM, the degree of congestion will exceed the threshold value Th1 three hours later at 4:00 PM. In this case, the control unit 33 of the control device 3 leaves the environment improvement device 11 operating.

[0040] Next, at time t4, the graph of the two-dot chain line showing the congestion level in the monitoring space 1 exceeds the threshold value Th1. If time t4 is 6:00 PM, then three hours later at 9:00 PM, the congestion level is below the threshold value Th1. In this case, the control unit 33 of the control device 3 leaves the environment improvement device 11 operating.

[0041] At time t5, the dashed-two-dot line graph showing the degree of congestion in the monitoring space 1 is below threshold Th1. If time t5 is 9:00 PM, the degree of congestion will be below threshold Th1 at midnight, three hours later. In this case, the control unit 33 of the control device 3 turns off and stops the environment improvement device 11.

[0042] As described above, the control unit 33 of the control device 3 can switch the environment improvement device 11 on and off based on, for example, changes in the past congestion level over time. Note that, although the environment improvement device 11 is switched on and off based on changes in the past congestion level over time in the above example, the environment improvement device 11 may also be switched on and off based on changes in the number of people, CO2 concentration, etc. in the monitored space 1 over time.

[0043] Next, the environment improvement processing in this embodiment will be described below with reference to the flowchart shown in Fig. 7. The environment improvement processing is stored as an environment improvement processing program in the storage unit 32 of the control device 3 shown in Fig. 1. The environment improvement processing program is started when the control device 3 is started. Specifically, the processor 3304 reads the environment improvement processing program stored in the storage device 3302 of the control device 3 shown in Fig. 3, loads it into the memory 3303, and executes it.

[0044] The data acquisition unit 331 of the control unit 33 of the control device 3 shown in Fig. 2 acquires past data similar to the current monitoring space 1 from the past performance database 321 stored in the storage unit 32 of the control device 3 shown in Fig. 1 (step S101). In detail, data similar to the current date and time, facility, location, etc. is acquired from the data stored in the past performance database 321.

[0045] 2 acquires the gaseous environment data measured by the environment measurement sensor 12 and the human data measured by the human measurement sensor 13 (step S102). The space state calculation unit 332 of the control unit 33 of the control device 3 calculates the pollution state within the monitoring space 1 (step S103). In detail, the space state calculation unit 332 calculates the pollution state within the monitoring space 1, i.e., the degree of congestion, CO2 concentration, etc. within the monitoring space 1, based on the gaseous environment data and the human data acquired in step S102.

[0046] 2 causes the pollution state calculated in step S103 to be displayed on the display device 21 of the notification system 2 (step S104). In detail, the display control unit 336 causes the display device 21 to display the current environmental state of the monitoring space 1, including the pollution state calculated in step S103, as in the notification screen 211 shown in FIG. 4, for example.

[0047] The spatial variation estimation unit 333 of the control unit 33 of the control device 3 shown in FIG. 2 estimates the variation over time of the contamination state from the past data acquired in step S101 (step S105).

[0048] The space improvement control unit 334 of the control unit 33 of the control device 3 shown in Fig. 2 determines whether the current pollution state calculated in step S103 and the change over time in the pollution state estimated in step S105 exceed thresholds (step S106). If both exceed the thresholds (step S106; YES), the space improvement control unit 334 determines whether the environment improvement device 11 shown in Fig. 1 is on (step S107).

[0049] If the environment improvement device 11 is on (step S107; YES), the space improvement control unit 334 returns to step S102 and executes the subsequent steps. If the environment improvement device 11 is off (step S107; NO), the space improvement control unit 334 turns on the environment improvement device 11 (step S108). The space improvement control unit 334 updates the total operating time of the environment improvement device 11 (step S109).

[0050] The replacement timing management unit 335 of the control unit 33 of the control device 3 shown in Fig. 2 determines whether the total operating time of the environment improvement device 11 is equal to or greater than a specified time (step S110). If the total operating time of the environment improvement device 11 is equal to or greater than the specified time (step S110; YES), the replacement timing management unit 335 causes the display control unit 336 of the control unit 33 of the control device 3 shown in Fig. 2 to display on the display device 21 of the notification system 2 shown in Fig. 1 that a sterilization filter, catalyst, or other decontamination means needs to be replaced (step S111). If the total operating time of the environment improvement device 11 is less than the specified time (step S110; NO), the replacement timing management unit 335 returns to step S102 and executes the subsequent steps.

[0051] In step S106, if the current pollution state calculated in step S103 and the change over time in the pollution state estimated in step S105 do not exceed the threshold (step S106; NO), the space improvement control unit 334 determines whether the current pollution state calculated in step S103 is equal to or less than the threshold and whether the change over time in the pollution state estimated in step S105 exceeds the threshold (step S112).If the current pollution state is equal to or less than the threshold and the change over time in the pollution state exceeds the threshold (step S112; YES), the space improvement control unit 334 proceeds to step S106 and executes the subsequent steps.

[0052] If the current pollution state is equal to or less than the threshold and the change in the pollution state over time does not exceed the threshold (step S112; NO), the space improvement control unit 334 determines whether the current pollution state exceeds the threshold and the change in the pollution state over time is equal to or less than the threshold (step S113).If the current pollution state exceeds the threshold and the change in the pollution state over time is equal to or less than the threshold (step S113; YES), the space improvement control unit 334 proceeds to step S102 and executes the subsequent steps.

[0053] Furthermore, if the current pollution state is below the threshold and the change in the pollution state over time is not below the threshold (step S113; NO), the space improvement control unit 334 determines whether the environment improvement device 11 is on or not (step S114). If the environment improvement device 11 is on (step S114; YES), the space improvement control unit 334 turns off the environment improvement device 11 (step S115). If the environment improvement device 11 is off (step S114; NO), the space improvement control unit 334 proceeds to step S102 and executes the subsequent steps.

[0054] As described above, according to the spatial environment improving system 100 of this embodiment, the control unit 33 of the control device 3 can switch the environment improving device 11 on and off based on the pollution state within the monitoring space 1 calculated from the measured gaseous environment data and human data, and on past changes in the pollution state within the space over time, thereby improving the pollution state within the monitoring space 1.

[0055] (Variation) In the above-described embodiment, a floor in a hospital has been used as an example of the monitored space 1, but the monitored space 1 is not limited to this. For example, the monitored space 1 may be a food factory that produces cut vegetables, a vegetable factory that grows vegetables, a pharmaceutical factory that produces medicines, a supermarket where an unspecified number of people and goods come and go, etc.

[0056] Furthermore, in the above-described embodiment, the control device 3 is a server that functions as a cloud, but the present invention is not limited to this and may be a stand-alone computer.

[0057] Furthermore, the method of applying the program in this embodiment is arbitrary. For example, the program can be stored in a computer-readable storage medium such as a flexible disk, a CD (Compact Disc)-ROM, a DVD (Digital Versatile Disc)-ROM, or a memory card and applied. Furthermore, the program can be superimposed on a carrier wave and applied via a communication medium such as the Internet. For example, the program can be posted and distributed on a bulletin board system (BBS) on a communication network. Then, the display selection processing program can be started and executed under the control of an operating system (OS) in the same way as other application programs, thereby enabling the above processing to be performed.

[0058] Although the preferred embodiments of the present invention have been described above, the present invention is not limited to such specific embodiments, and the present invention includes the inventions described in the claims and their equivalents. [Explanation of symbols]

[0059] 1. Monitoring space 2. Notification System 3. Control device 11...Environmental improvement equipment 12. Environmental measurement sensor 13. Human measurement sensor 21...Display device 31. Communications Department 32...Storage section 33 Control section 100···Spatial environment improvement system 111...Sterilizer 112...Air conditioning equipment 113...DAC equipment 114 Ventilation equipment 121 CO2 sensor 122 Temperature sensor 123 Humidity Sensor 124 Barometric pressure sensor 125 TVOC sensor 211...Notification screen 212...Date and time display section 213...Information presentation section 321···Past performance database 331 Data Acquisition Unit 332...Spatial state calculation unit 333···Spatial change estimation unit 334···Space Improvement Control Unit 335...Replacement timing management department 336 Display control unit 2131 Location selection section 2131a Facility selection button 2131b Floor selection button 2131c···Location selection button 2131d···Change button 2132 Environmental status display unit 2133 Video display unit 2133a...person 2133b...person 2133c...person 2133d...person 2133e...person 2133f...person 3301 Communication equipment 3302...Storage device 3303 Memory 3304 processor 3305 Bus

Claims

1. In a space environment improvement system that monitors the pollution status of indoor monitoring spaces and improves the space environment, an environment measuring means for measuring the gaseous environment in the monitoring space; a presence detection means for detecting the presence of a person in the monitoring space; a space condition calculation unit that calculates the pollution condition of the monitoring space from the gaseous environment data measured by the environment measurement means and the human data measured by the human measurement means; a space improvement control unit that controls an environment improvement means for improving the contamination state in the monitoring space based on the contamination state calculated by the space state calculation unit; A spatial environment improvement system equipped with:

2. a space variation estimation unit that estimates a contamination state in the monitoring space; the space improvement control unit controls the environment improvement means based on the change over time in the pollution state estimated by the space change estimation unit. The spatial environment improving system according to claim 1 .

3. display means for displaying information to be presented to a user; a display control unit that causes the display means to display information; the display control unit displays the contamination state in the monitoring space calculated by the space state calculation unit on the display means.

3. The spatial environment improving system according to claim 1 or 2.

4. a replacement timing management unit that manages the replacement timing of the decontamination means for the environment improvement means to improve the contamination state based on the contamination state calculated by the space state calculation unit and changes over time in the past contamination state; The spatial environment improving system according to claim 2 .

5. display means for displaying information to be presented to a user; a display control unit that causes the display means to display information; The display control unit displays the catalyst replacement time managed by the replacement time management unit on the display means. The spatial environment improving system according to claim 4.

6. the space change estimation unit estimates the contamination state in the monitoring space based on the contamination state calculated by the space state calculation unit and changes over time in the past contamination state; The spatial environment improving system according to claim 2 .

7. the space change estimation unit estimates the contamination state in the monitoring space based on the time-varying change in the human data measured by the human measurement means and the time-varying change in the past contamination state; The spatial environment improving system according to claim 2 .

8. A method executed by a space environment improvement system for monitoring a pollution state of an indoor monitoring space and improving the space environment, measuring the gaseous environment in the monitoring space; determining the presence of a person in the monitoring space; calculating a pollution state of the monitoring space from gaseous environment data, which is the measured gaseous environment in the monitoring space, and human data, which is the measured presence of people in the monitoring space; improving the contamination state in the monitoring space based on the calculated contamination state; method.

9. On the computer, A process for measuring the gaseous environment within the monitoring space; determining the presence of a person in the monitored space; A process of calculating the pollution state of the monitoring space from gaseous environment data, which is the measured gaseous environment in the monitoring space, and human data, which is the measured presence of people in the monitoring space; a process of improving the contamination state in the monitoring space based on the calculated contamination state; A program to execute.

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